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11523150 | How Do You Monitor The CPU Utilization of a Process Using PowerShell? | 13 | 2012-07-17 13:06:31 | <p>I'm trying to write a PowerShell script to monitor % CPU utilization of a SQL Server process. I'd like to record snapshots of this number every day so we can monitor it over time and watch for trends.</p>
<p>My research online said this WMI query should give me what I want:</p>
<pre><code>Get-WmiObject -Query "SEL... | 29,759 | 1,066,291 | 2012-09-03 14:58:48 | 11,565,773 | 16 | 2012-07-19 16:59:49 | 1,066,291 | 2012-08-22 17:24:53 | https://stackoverflow.com/q/11523150 | https://stackoverflow.com/a/11565773 | <p>Everything I've learned about WMI and performance counters over the last couple of days.</p>
<p>WMI stands for Windows Management Instrumentation. WMI is a collection of classes registered with the WMI system and the Windows COM subsystem. These classes are known as providers and have any number of public propertie... | <p>Everything I've learned about WMI and performance counters over the last couple of days.</p> <p>WMI stands for Windows Management Instrumentation. WMI is a collection of classes registered with the WMI system and the Windows COM subsystem. These classes are known as providers and have any number of public propertie... | 72, 526, 680 | powershell, sql-server, wmi | <h1>How Do You Monitor The CPU Utilization of a Process Using PowerShell?</h1>
<p>I'm trying to write a PowerShell script to monitor % CPU utilization of a SQL Server process. I'd like to record snapshots of this number every day so we can monitor it over time and watch for trends.</p>
<p>My research online said this ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,762 | bash | # How Do You Monitor The CPU Utilization of a Process Using PowerShell?
I'm trying to write a PowerShell script to monitor % CPU utilization of a SQL Server process. I'd like to record snapshots of this number every day so we can monitor it over time and watch for trends.
My research online said this WMI query should... | Everything I've learned about WMI and performance counters over the last couple of days.
WMI stands for Windows Management Instrumentation. WMI is a collection of classes registered with the WMI system and the Windows COM subsystem. These classes are known as providers and have any number of public properties that ret... |
6362428 | How do I determine if a shell script is running with root permissions? | 13 | 2011-06-15 18:21:14 | <p>I've got a script I want to require be run with su privileges, but the interesting scripted command that will fail comes very late in the script, so I'd like a clean test up front to determine if the scrip will fail without SU capabilities.</p>
<p>What is a good way to do this for bash, sh, and/or csh?</p>
| 10,584 | 523,113 | 2019-10-21 06:20:07 | 6,362,604 | 16 | 2011-06-15 18:36:54 | 530,160 | 2019-10-21 06:20:07 | https://stackoverflow.com/q/6362428 | https://stackoverflow.com/a/6362604 | <p>bash/sh:</p>
<pre><code>#!/usr/bin/env bash
# (Use #!/bin/sh for sh)
if [ `id -u` = 0 ] ; then
echo "I AM ROOT, HEAR ME ROAR"
fi
</code></pre>
<p>csh:</p>
<pre><code>#!/bin/csh
if ( `id -u` == "0" ) then
echo "I AM ROOT, HEAR ME ROAR"
endif
</code></pre>
| <p>bash/sh:</p> <pre><code>#!/usr/bin/env bash # (Use #!/bin/sh for sh) if [ `id -u` = 0 ] ; then echo "I AM ROOT, HEAR ME ROAR" fi </code></pre> <p>csh:</p> <pre><code>#!/bin/csh if ( `id -u` == "0" ) then echo "I AM ROOT, HEAR ME ROAR" endif </code></pre> | 359, 390, 1674 | permissions, shell, sudo | <h1>How do I determine if a shell script is running with root permissions?</h1>
<p>I've got a script I want to require be run with su privileges, but the interesting scripted command that will fail comes very late in the script, so I'd like a clean test up front to determine if the scrip will fail without SU capabiliti... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,763 | bash | # How do I determine if a shell script is running with root permissions?
I've got a script I want to require be run with su privileges, but the interesting scripted command that will fail comes very late in the script, so I'd like a clean test up front to determine if the scrip will fail without SU capabilities.
What... | bash/sh:
```
#!/usr/bin/env bash
# (Use #!/bin/sh for sh)
if [ `id -u` = 0 ] ; then
echo "I AM ROOT, HEAR ME ROAR"
fi
```
csh:
```
#!/bin/csh
if ( `id -u` == "0" ) then
echo "I AM ROOT, HEAR ME ROAR"
endif
``` |
4926060 | PowerShell: Runspace problem with DownloadFileAsync | 13 | 2011-02-07 20:16:13 | <p>I needed to download file using <code>WebClient</code> in PowerShell 2.0, and I wanted to show download progress, so I did it this way:</p>
<pre><code>$activity = "Downloading"
$client = New-Object System.Net.WebClient
$urlAsUri = New-Object System.Uri($url)
$event = New-Object System.Threading.ManualResetEvent($... | 8,540 | 39,068 | 2013-03-18 08:49:02 | 4,927,295 | 16 | 2011-02-07 22:16:44 | 6,920 | 2013-03-18 08:49:02 | https://stackoverflow.com/q/4926060 | https://stackoverflow.com/a/4927295 | <p>Thanks stej for the nod. </p>
<p>Andrey, powershell has its own threadpool and each service thread keeps a threadstatic pointer to a runspace (the System.Management.Automation.Runspaces.Runspace.DefaultRunspace static member exposes this - and would be a null ref in your callbacks.) Ultimately this means it's diffi... | <p>Thanks stej for the nod. </p> <p>Andrey, powershell has its own threadpool and each service thread keeps a threadstatic pointer to a runspace (the System.Management.Automation.Runspaces.Runspace.DefaultRunspace static member exposes this - and would be a null ref in your callbacks.) Ultimately this means it's diffi... | 526, 1381 | multithreading, powershell | <h1>PowerShell: Runspace problem with DownloadFileAsync</h1>
<p>I needed to download file using <code>WebClient</code> in PowerShell 2.0, and I wanted to show download progress, so I did it this way:</p>
<pre><code>$activity = "Downloading"
$client = New-Object System.Net.WebClient
$urlAsUri = New-Object System.Uri($... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,764 | bash | # PowerShell: Runspace problem with DownloadFileAsync
I needed to download file using `WebClient` in PowerShell 2.0, and I wanted to show download progress, so I did it this way:
```
$activity = "Downloading"
$client = New-Object System.Net.WebClient
$urlAsUri = New-Object System.Uri($url)
$event = New-Object Syste... | Thanks stej for the nod.
Andrey, powershell has its own threadpool and each service thread keeps a threadstatic pointer to a runspace (the System.Management.Automation.Runspaces.Runspace.DefaultRunspace static member exposes this - and would be a null ref in your callbacks.) Ultimately this means it's difficult - espe... |
3927062 | Problem with backticks in shellscript | 13 | 2010-10-13 19:00:51 | <p>I am having a problem getting my shellscript working using backticks. Here is an example version of the script I am having an issue with:</p>
<pre><code>#!/bin/sh
ECHO_TEXT="Echo this"
ECHO_CMD="echo ${ECHO_TEXT} | awk -F' ' '{print \$1}'"
result=`${ECHO_CMD}`;
echo $result;
result=`echo ${ECHO_TEXT} | awk -F' ... | 26,687 | 45,129 | 2010-10-13 20:45:35 | 3,927,167 | 16 | 2010-10-13 19:14:18 | 227,665 | 2010-10-13 19:19:19 | https://stackoverflow.com/q/3927062 | https://stackoverflow.com/a/3927167 | <p>You need to use <code>eval</code> to get it working</p>
<pre><code>result=`eval ${ECHO_CMD}`;
</code></pre>
<p>in place of</p>
<pre><code>result=`${ECHO_CMD}`;
</code></pre>
<p>Without <code>eval</code> </p>
<pre><code>${ECHO_TEXT} | awk -F' ' '{print \$1}
</code></pre>
<p>which will be expanded to</p>
<pre><... | <p>You need to use <code>eval</code> to get it working</p> <pre><code>result=`eval ${ECHO_CMD}`; </code></pre> <p>in place of</p> <pre><code>result=`${ECHO_CMD}`; </code></pre> <p>Without <code>eval</code> </p> <pre><code>${ECHO_TEXT} | awk -F' ' '{print \$1} </code></pre> <p>which will be expanded to</p> <pre><... | 390, 28438 | backticks, shell | <h1>Problem with backticks in shellscript</h1>
<p>I am having a problem getting my shellscript working using backticks. Here is an example version of the script I am having an issue with:</p>
<pre><code>#!/bin/sh
ECHO_TEXT="Echo this"
ECHO_CMD="echo ${ECHO_TEXT} | awk -F' ' '{print \$1}'"
result=`${ECHO_CMD}`;
echo... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,765 | bash | # Problem with backticks in shellscript
I am having a problem getting my shellscript working using backticks. Here is an example version of the script I am having an issue with:
```
#!/bin/sh
ECHO_TEXT="Echo this"
ECHO_CMD="echo ${ECHO_TEXT} | awk -F' ' '{print \$1}'"
result=`${ECHO_CMD}`;
echo $result;
result=`ec... | You need to use `eval` to get it working
```
result=`eval ${ECHO_CMD}`;
```
in place of
```
result=`${ECHO_CMD}`;
```
Without `eval`
```
${ECHO_TEXT} | awk -F' ' '{print \$1}
```
which will be expanded to
```
Echo this | awk -F' ' '{print \$1}
```
will be treated as argument to `echo` and will be output verbati... |
3605522 | how to iterate over files with powershell? | 13 | 2010-08-31 01:54:10 | <p>I want to iterate over files in a folder using powershell script;</p>
| 12,311 | 161,758 | 2013-02-13 15:30:26 | 3,605,532 | 16 | 2010-08-31 02:00:14 | 73,070 | 2013-02-13 15:30:26 | https://stackoverflow.com/q/3605522 | https://stackoverflow.com/a/3605532 | <pre><code>Get-ChildItem | ForEach-Object { <# do what you need to do #> }
</code></pre>
<p>or shorter:</p>
<pre><code>gci | % { <# ... #> }
</code></pre>
<p>or if you want an explicit looping construct:</p>
<pre><code>foreach ($file in Get-ChildItem) {
# ...
}
</code></pre>
<p>Note however, that <... | <pre><code>Get-ChildItem | ForEach-Object { <# do what you need to do #> } </code></pre> <p>or shorter:</p> <pre><code>gci | % { <# ... #> } </code></pre> <p>or if you want an explicit looping construct:</p> <pre><code>foreach ($file in Get-ChildItem) { # ... } </code></pre> <p>Note however, that <... | 526 | powershell | <h1>how to iterate over files with powershell?</h1>
<p>I want to iterate over files in a folder using powershell script;</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,766 | bash | # how to iterate over files with powershell?
I want to iterate over files in a folder using powershell script; | ```
Get-ChildItem | ForEach-Object { <# do what you need to do #> }
```
or shorter:
```
gci | % { <# ... #> }
```
or if you want an explicit looping construct:
```
foreach ($file in Get-ChildItem) {
# ...
}
```
Note however, that `foreach` will only run once all output from `Get-ChildItem` is collected. In my ... |
1831527 | Simple way to colour alternate output lines in bash | 13 | 2009-12-02 08:46:09 | <p>I have need to grep an entire directory for a string, and I get about 50 results. I would like to colour each second line, either text colour or background colour. Best would be a script that I can pipe the output of any command to, and so that it spits out the same (albeit coloured) output.</p>
| 9,872 | 210,945 | 2014-08-14 21:57:41 | 1,831,633 | 16 | 2009-12-02 09:04:58 | 180,174 | 2014-08-14 21:57:41 | https://stackoverflow.com/q/1831527 | https://stackoverflow.com/a/1831633 | <p>Not very pretty but does the trick:</p>
<p>(save this to <code>foo.bash</code> and do <code>grep whatever wherever | ./foo.bash</code>)</p>
<pre><code>#!/bin/bash
while read line
do
echo -e "\e[1;31m$line"
read line
echo -e "\e[1;32m$line"
done
echo -en "\e[0m"
</code></pre>
<p>Here you can find the <a href... | <p>Not very pretty but does the trick:</p> <p>(save this to <code>foo.bash</code> and do <code>grep whatever wherever | ./foo.bash</code>)</p> <pre><code>#!/bin/bash while read line do echo -e "\e[1;31m$line" read line echo -e "\e[1;32m$line" done echo -en "\e[0m" </code></pre> <p>Here you can find the <a href... | 387, 390, 1231, 6439 | bash, colors, command-line, shell | <h1>Simple way to colour alternate output lines in bash</h1>
<p>I have need to grep an entire directory for a string, and I get about 50 results. I would like to colour each second line, either text colour or background colour. Best would be a script that I can pipe the output of any command to, and so that it spits ou... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,767 | bash | # Simple way to colour alternate output lines in bash
I have need to grep an entire directory for a string, and I get about 50 results. I would like to colour each second line, either text colour or background colour. Best would be a script that I can pipe the output of any command to, and so that it spits out the sam... | Not very pretty but does the trick:
(save this to `foo.bash` and do `grep whatever wherever | ./foo.bash`)
```
#!/bin/bash
while read line
do
echo -e "\e[1;31m$line"
read line
echo -e "\e[1;32m$line"
done
echo -en "\e[0m"
```
Here you can find the [list of color codes in bash](http://wiki.archlinux.org/index.p... |
803653 | bash completion for certain types of files in a special directory | 13 | 2009-04-29 18:32:58 | <p>I have a list of unison profiles which exists in <code>~/.unison/*.prf</code>.</p>
<p>I'd like to have bash completion so that when I type <code>unison</code> or <code>unison-gtk</code> and hit tab it would list the <code>.prf</code> files from that folder without the <code>.prf</code> part.</p>
<p>Perhaps an exam... | 2,086 | 95,818 | 2009-04-29 19:34:22 | 803,714 | 16 | 2009-04-29 18:46:26 | 69,952 | 2009-04-29 19:34:22 | https://stackoverflow.com/q/803653 | https://stackoverflow.com/a/803714 | <p>If you are running debian/ubuntu or possibly other GNU/Linux distros, there should be examples of this type of completion in your /etc/bash_completion.d/ directory. Here is an example of how you might set up a completion script for unison:</p>
<pre><code>have unison &&
_unison_show()
{
local cur
... | <p>If you are running debian/ubuntu or possibly other GNU/Linux distros, there should be examples of this type of completion in your /etc/bash_completion.d/ directory. Here is an example of how you might set up a completion script for unison:</p> <pre><code>have unison && _unison_show() { local cur ... | 387, 4682 | autocomplete, bash | <h1>bash completion for certain types of files in a special directory</h1>
<p>I have a list of unison profiles which exists in <code>~/.unison/*.prf</code>.</p>
<p>I'd like to have bash completion so that when I type <code>unison</code> or <code>unison-gtk</code> and hit tab it would list the <code>.prf</code> files f... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,768 | bash | # bash completion for certain types of files in a special directory
I have a list of unison profiles which exists in `~/.unison/*.prf`.
I'd like to have bash completion so that when I type `unison` or `unison-gtk` and hit tab it would list the `.prf` files from that folder without the `.prf` part.
Perhaps an example... | If you are running debian/ubuntu or possibly other GNU/Linux distros, there should be examples of this type of completion in your /etc/bash_completion.d/ directory. Here is an example of how you might set up a completion script for unison:
```
have unison &&
_unison_show()
{
local cur
COMPREPLY=()
... |
497681 | Using mplayer to determine length of audio/video file | 13 | 2009-01-30 23:27:49 | <p>The following works very nicely to determine the length of various audio/video files:</p>
<pre><code>mplayer -identify file.ogg 2>/dev/null | grep ID_LENGTH
</code></pre>
<p>However, I want to kill mplayer's output so I can determine the length of many files more efficiently. How do I do that?</p>
| 16,857 | null | 2020-04-08 13:05:49 | 498,138 | 16 | 2009-01-31 03:09:17 | 20,713 | 2009-01-31 03:09:17 | https://stackoverflow.com/q/497681 | https://stackoverflow.com/a/498138 | <p>The <code>MPlayer</code> source ships with a sample script called <code>midentify</code>, which looks like this:</p>
<pre><code>#!/bin/sh
#
# This is a wrapper around the -identify functionality.
# It is supposed to escape the output properly, so it can be easily
# used in shellscripts by 'eval'ing the output of th... | <p>The <code>MPlayer</code> source ships with a sample script called <code>midentify</code>, which looks like this:</p> <pre><code>#!/bin/sh # # This is a wrapper around the -identify functionality. # It is supposed to escape the output properly, so it can be easily # used in shellscripts by 'eval'ing the output of th... | 390 | shell | <h1>Using mplayer to determine length of audio/video file</h1>
<p>The following works very nicely to determine the length of various audio/video files:</p>
<pre><code>mplayer -identify file.ogg 2>/dev/null | grep ID_LENGTH
</code></pre>
<p>However, I want to kill mplayer's output so I can determine the length of m... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,769 | bash | # Using mplayer to determine length of audio/video file
The following works very nicely to determine the length of various audio/video files:
```
mplayer -identify file.ogg 2>/dev/null | grep ID_LENGTH
```
However, I want to kill mplayer's output so I can determine the length of many files more efficiently. How do I... | The `MPlayer` source ships with a sample script called `midentify`, which looks like this:
```
#!/bin/sh
#
# This is a wrapper around the -identify functionality.
# It is supposed to escape the output properly, so it can be easily
# used in shellscripts by 'eval'ing the output of this script.
#
# Written by Tobias Die... |
240661 | What's the best practice for changing working directories inside scripts? | 13 | 2008-10-27 17:09:55 | <p>Do you think changing directories inside bash or Perl scripts is acceptable? Or should one avoid doing this at all costs?</p>
<p>What is the best practice for this issue?</p>
| 20,272 | 13,523 | 2008-10-28 04:06:35 | 240,703 | 16 | 2008-10-27 17:19:16 | 972 | 2008-10-27 17:19:16 | https://stackoverflow.com/q/240661 | https://stackoverflow.com/a/240703 | <p>The current working directory is local to the executing shell, so you can't affect the user unless he is "dotting" (running it in the current shell, as opposed to running it normally creating a new shell process) your script.</p>
<p>A very good way of doing this is to use subshells, which i often do in aliases.</p>... | <p>The current working directory is local to the executing shell, so you can't affect the user unless he is "dotting" (running it in the current shell, as opposed to running it normally creating a new shell process) your script.</p> <p>A very good way of doing this is to use subshells, which i often do in aliases.</p>... | 387, 390, 580, 3791 | bash, perl, shell, zsh | <h1>What's the best practice for changing working directories inside scripts?</h1>
<p>Do you think changing directories inside bash or Perl scripts is acceptable? Or should one avoid doing this at all costs?</p>
<p>What is the best practice for this issue?</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,770 | bash | # What's the best practice for changing working directories inside scripts?
Do you think changing directories inside bash or Perl scripts is acceptable? Or should one avoid doing this at all costs?
What is the best practice for this issue? | The current working directory is local to the executing shell, so you can't affect the user unless he is "dotting" (running it in the current shell, as opposed to running it normally creating a new shell process) your script.
A very good way of doing this is to use subshells, which i often do in aliases.
```
alias bu... |
67852305 | How to prepend to a file in PowerShell? | 12 | 2021-06-05 17:37:28 | <p>I'm generating two files, <code>userscript.meta.js</code> and <code>userscript.user.js</code>. I need the output of <code>userscript.meta.js</code> to be placed at the very beginning of <code>userscript.user.js</code>.</p>
<p><code>Add-Content</code> doesn't seem to accept a parameter to prepend and <code>Get-Conten... | 5,452 | 5,083,247 | 2023-01-05 12:47:12 | 67,852,426 | 16 | 2021-06-05 17:52:52 | 15,339,544 | 2023-01-05 12:47:12 | https://stackoverflow.com/q/67852305 | https://stackoverflow.com/a/67852426 |
<p>The <a href="https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_operators?view=powershell-7.2#subexpression-operator--" rel="noreferrer">Subexpression operator <code>$( )</code></a> can evaluate both <a href="https://learn.microsoft.com/en-us/powershell/module/microsoft.powers... | <p>The <a href="https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_operators?view=powershell-7.2#subexpression-operator--" rel="noreferrer">Subexpression operator <code>$( )</code></a> can evaluate both <a href="https://learn.microsoft.com/en-us/powershell/module/microsoft.powers... | 526, 33096, 130616 | powershell, powershell-core, prepend | <h1>How to prepend to a file in PowerShell?</h1>
<p>I'm generating two files, <code>userscript.meta.js</code> and <code>userscript.user.js</code>. I need the output of <code>userscript.meta.js</code> to be placed at the very beginning of <code>userscript.user.js</code>.</p>
<p><code>Add-Content</code> doesn't seem to a... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,771 | bash | # How to prepend to a file in PowerShell?
I'm generating two files, `userscript.meta.js` and `userscript.user.js`. I need the output of `userscript.meta.js` to be placed at the very beginning of `userscript.user.js`.
`Add-Content` doesn't seem to accept a parameter to prepend and `Get-Content | Set-Content` will fail... | The [Subexpression operator `$( )`](https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_operators?view=powershell-7.2#subexpression-operator--) can evaluate both [`Get-Content`](https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.management/get-content?view=pow... |
65346260 | Get real architecture of M1 Mac regardless of Rosetta | 12 | 2020-12-17 18:19:26 | <p>I need to retrieve the real architecture of a Mac regardless of if the process is running through Rosetta or not.</p>
<p>Right now in Node.js, <code>process.arch</code> returns <code>x64</code> and in shell, <code>uname -m</code> returns <code>x86_64</code>.</p>
| 6,704 | 864,101 | 2021-12-17 22:11:52 | 65,347,893 | 16 | 2020-12-17 20:28:28 | 864,101 | 2020-12-17 20:28:28 | https://stackoverflow.com/q/65346260 | https://stackoverflow.com/a/65347893 | <p>Thanks to @Ouroborus, <a href="https://developer.apple.com/documentation/apple_silicon/about_the_rosetta_translation_environment#3616845" rel="noreferrer">this note</a> describes how to figure out if your app is translated.</p>
<p>If it's translated:</p>
<pre class="lang-sh prettyprint-override"><code>$ sysctl sysct... | <p>Thanks to @Ouroborus, <a href="https://developer.apple.com/documentation/apple_silicon/about_the_rosetta_translation_environment#3616845" rel="noreferrer">this note</a> describes how to figure out if your app is translated.</p> <p>If it's translated:</p> <pre class="lang-sh prettyprint-override"><code>$ sysctl sysct... | 3, 369, 390, 46426, 54021 | javascript, macos, node.js, rosetta, shell | <h1>Get real architecture of M1 Mac regardless of Rosetta</h1>
<p>I need to retrieve the real architecture of a Mac regardless of if the process is running through Rosetta or not.</p>
<p>Right now in Node.js, <code>process.arch</code> returns <code>x64</code> and in shell, <code>uname -m</code> returns <code>x86_64</co... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,772 | bash | # Get real architecture of M1 Mac regardless of Rosetta
I need to retrieve the real architecture of a Mac regardless of if the process is running through Rosetta or not.
Right now in Node.js, `process.arch` returns `x64` and in shell, `uname -m` returns `x86_64`. | Thanks to @Ouroborus, [this note](https://developer.apple.com/documentation/apple_silicon/about_the_rosetta_translation_environment#3616845) describes how to figure out if your app is translated.
If it's translated:
```
$ sysctl sysctl.proc_translated
sysctl.proc_translated: 1
```
If not:
```
$ sysctl sysctl.proc_t... |
63629990 | Set KUBECONFIG environment variable dynamically | 12 | 2020-08-28 08:15:59 | <p>I am quite new to Bash and working on multiple kubernetes cluster. I wanted some kind of utility wherein I can set my KUBECONFIG variable dynamically as I work on multiple clusters. My kubeconfig file lies in multiple folders. What I want is to find all the kubeconfig files , get the paths and concatenate the paths ... | 50,524 | 9,311,364 | 2020-08-28 13:23:28 | 63,634,642 | 16 | 2020-08-28 13:23:28 | 13,891,405 | 2020-08-28 13:23:28 | https://stackoverflow.com/q/63629990 | https://stackoverflow.com/a/63634642 | <p>You can try something like that:</p>
<pre><code>export KUBECONFIG=$(for i in $(find /Users/anandabhishe/gitlab/ -iname 'kubeconfig.yaml') ; do echo -n ":$i"; done | cut -c 2-)
</code></pre>
| <p>You can try something like that:</p> <pre><code>export KUBECONFIG=$(for i in $(find /Users/anandabhishe/gitlab/ -iname 'kubeconfig.yaml') ; do echo -n ":$i"; done | cut -c 2-) </code></pre> | 387, 390, 10193 | bash, find, shell | <h1>Set KUBECONFIG environment variable dynamically</h1>
<p>I am quite new to Bash and working on multiple kubernetes cluster. I wanted some kind of utility wherein I can set my KUBECONFIG variable dynamically as I work on multiple clusters. My kubeconfig file lies in multiple folders. What I want is to find all the ku... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,773 | bash | # Set KUBECONFIG environment variable dynamically
I am quite new to Bash and working on multiple kubernetes cluster. I wanted some kind of utility wherein I can set my KUBECONFIG variable dynamically as I work on multiple clusters. My kubeconfig file lies in multiple folders. What I want is to find all the kubeconfig ... | You can try something like that:
```
export KUBECONFIG=$(for i in $(find /Users/anandabhishe/gitlab/ -iname 'kubeconfig.yaml') ; do echo -n ":$i"; done | cut -c 2-)
``` |
55423220 | Can't get all excel processes to stop when closing through Powershell | 12 | 2019-03-29 18:04:11 | <p>With this code, I am opening excel(with visible = false so the user cannot see it), writing to a workbook, and then either opening excel(making it visible) after the script ends or closing it completely without saving. When I save excel, leave it open, end the script, and then manually close excel later, there are n... | 6,081 | 11,096,683 | 2024-09-17 16:30:17 | 55,423,449 | 16 | 2019-03-29 18:19:53 | 45,375 | 2024-09-17 16:30:17 | https://stackoverflow.com/q/55423220 | https://stackoverflow.com/a/55423449 |
<p><strong>tl;dr</strong></p>
<p>Use the following <strong>idiom</strong> to ensure that all references to COM objects are released, which, in combination with calling <code>$excel.Quit()</code>, ensures that the Excel process (eventually) terminates:</p>
<pre class="lang-bash prettyprint-override"><code>& { # Cr... | <p><strong>tl;dr</strong></p> <p>Use the following <strong>idiom</strong> to ensure that all references to COM objects are released, which, in combination with calling <code>$excel.Quit()</code>, ensures that the Excel process (eventually) terminates:</p> <pre class="lang-bash prettyprint-override"><code>& { # Cr... | 162, 522, 526, 865, 24034 | com, excel, powershell, rcw, user-interface | <h1>Can't get all excel processes to stop when closing through Powershell</h1>
<p>With this code, I am opening excel(with visible = false so the user cannot see it), writing to a workbook, and then either opening excel(making it visible) after the script ends or closing it completely without saving. When I save excel, ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,774 | bash | # Can't get all excel processes to stop when closing through Powershell
With this code, I am opening excel(with visible = false so the user cannot see it), writing to a workbook, and then either opening excel(making it visible) after the script ends or closing it completely without saving. When I save excel, leave it ... | **tl;dr**
Use the following **idiom** to ensure that all references to COM objects are released, which, in combination with calling `$excel.Quit()`, ensures that the Excel process (eventually) terminates:
```
& { # Create a temporary child scope.
$excel = New-Object -ComObject excel.application # create excel obj... |
51861707 | Error parsing parameter '--expression-attribute-values': Invalid JSON: Expecting property name enclosed in double quotes: line 1 column 3 (char 2) | 12 | 2018-08-15 15:24:50 | <p>I am running the following query</p>
<pre><code>aws dynamodb query `
--table-name user`
--key-condition-expression "datecreated = :d" `
--expression-attribute-values "{ ':d': { 'S': '2018-08-15' } }" --endpoint-url http://localhost:8000
</code></pre>
<p>Does dynamodb even understand what a double quote is?</p>
<o... | 24,575 | 2,462,878 | 2025-05-30 14:50:11 | 51,861,924 | 16 | 2018-08-15 15:38:40 | 45,375 | 2021-11-27 13:40:26 | https://stackoverflow.com/q/51861707 | https://stackoverflow.com/a/51861924 | <p>There are two immediate problems:</p>
<ul>
<li><p><strong><code>'</code> (single quotes) aren't valid string delimiters</strong> in JSON; you <strong>must use <code>"</code></strong> (double quotes):</p>
</li>
<li><p>Sadly, as of v7.2 <strong>PowerShell requires you to <code>\</code>-escape argument-internal <c... | <p>There are two immediate problems:</p> <ul> <li><p><strong><code>'</code> (single quotes) aren't valid string delimiters</strong> in JSON; you <strong>must use <code>"</code></strong> (double quotes):</p> </li> <li><p>Sadly, as of v7.2 <strong>PowerShell requires you to <code>\</code>-escape argument-internal <c... | 526, 33388, 76578, 99166 | amazon-dynamodb, amazon-web-services, aws-cli, powershell | <h1>Error parsing parameter '--expression-attribute-values': Invalid JSON: Expecting property name enclosed in double quotes: line 1 column 3 (char 2)</h1>
<p>I am running the following query</p>
<pre><code>aws dynamodb query `
--table-name user`
--key-condition-expression "datecreated = :d" `
--expression-attribute-v... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,775 | bash | # Error parsing parameter '--expression-attribute-values': Invalid JSON: Expecting property name enclosed in double quotes: line 1 column 3 (char 2)
I am running the following query
```
aws dynamodb query `
--table-name user`
--key-condition-expression "datecreated = :d" `
--expression-attribute-values "{ ':d': { 'S'... | There are two immediate problems:
- **`'` (single quotes) aren't valid string delimiters** in JSON; you **must use `"`** (double quotes):
- Sadly, as of v7.2 **PowerShell requires you to `\`-escape argument-internal `"` characters *when calling external programs***, *even though that **shouldn't be necessary***.
- ... |
49480275 | Add SSL Certificate to Windows Docker Container | 12 | 2018-03-25 19:53:30 | <p>How can I add a <em>.cer</em>-Certificate inside a Docker container? It has to be done via powershell since the container has no interface to open <code>mms.exe</code>.</p>
<p><a href="http://colmprunty1.azurewebsites.net/2017/06/07/import-and-bind-an-ssl-cert-in-windows-container/" rel="noreferrer">This</a> is a g... | 18,491 | 2,470,546 | 2018-03-27 15:51:22 | 49,517,359 | 16 | 2018-03-27 15:51:22 | 2,470,546 | 2018-03-27 15:51:22 | https://stackoverflow.com/q/49480275 | https://stackoverflow.com/a/49517359 | <p>The problem does not appear when importing to the LocalMachine folder: </p>
<p><code>Import-Certificate -FilePath C:\myCertificateToAdd.cert -CertStoreLocation Cert:\LocalMachine\Root\</code></p>
<p>Like this, the certificate is importet to every "CurrentUser" on the machine. If this is ok, as for the typical Dock... | <p>The problem does not appear when importing to the LocalMachine folder: </p> <p><code>Import-Certificate -FilePath C:\myCertificateToAdd.cert -CertStoreLocation Cert:\LocalMachine\Root\</code></p> <p>Like this, the certificate is importet to every "CurrentUser" on the machine. If this is ok, as for the typical Dock... | 64, 526, 14423, 90304 | docker, powershell, ssl-certificate, windows | <h1>Add SSL Certificate to Windows Docker Container</h1>
<p>How can I add a <em>.cer</em>-Certificate inside a Docker container? It has to be done via powershell since the container has no interface to open <code>mms.exe</code>.</p>
<p><a href="http://colmprunty1.azurewebsites.net/2017/06/07/import-and-bind-an-ssl-cer... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,776 | bash | # Add SSL Certificate to Windows Docker Container
How can I add a *.cer*-Certificate inside a Docker container? It has to be done via powershell since the container has no interface to open `mms.exe`.
[This](http://colmprunty1.azurewebsites.net/2017/06/07/import-and-bind-an-ssl-cert-in-windows-container/) is a good t... | The problem does not appear when importing to the LocalMachine folder:
`Import-Certificate -FilePath C:\myCertificateToAdd.cert -CertStoreLocation Cert:\LocalMachine\Root\`
Like this, the certificate is importet to every "CurrentUser" on the machine. If this is ok, as for the typical DockerContainer, the problem is s... |
46313746 | IFS=: leads to different behavior while looping over colon-separated values | 12 | 2017-09-20 05:11:40 | <h3>Experiment 1</h3>
<p>Here is my first script in file named <code>foo.sh</code>.</p>
<pre><code>IFS=:
for i in foo:bar:baz
do
echo $i
done
</code></pre>
<p>This produces the following output.</p>
<pre><code>$ bash foo.sh
foo bar baz
</code></pre>
<h3>Experiment 2</h3>
<p>This is my second script.</p>
<pre... | 437 | 1,175,080 | 2018-03-22 04:13:52 | 46,633,130 | 16 | 2017-10-08 16:01:10 | 641,955 | 2017-10-08 18:21:41 | https://stackoverflow.com/q/46313746 | https://stackoverflow.com/a/46633130 | <p>I found this a very interesting experiment.
Thank you for that.</p>
<hr>
<p>To understand what is going on,
the relevant section from <code>man bash</code> is this:</p>
<blockquote>
<pre> Word Splitting
The shell scans the results of parameter expansion, command substitu-
tion, and arithmetic expan... | <p>I found this a very interesting experiment. Thank you for that.</p> <hr> <p>To understand what is going on, the relevant section from <code>man bash</code> is this:</p> <blockquote> <pre> Word Splitting The shell scans the results of parameter expansion, command substitu- tion, and arithmetic expan... | 387, 390, 2531, 26793 | bash, for-loop, ifs, shell | <h1>IFS=: leads to different behavior while looping over colon-separated values</h1>
<h3>Experiment 1</h3>
<p>Here is my first script in file named <code>foo.sh</code>.</p>
<pre><code>IFS=:
for i in foo:bar:baz
do
echo $i
done
</code></pre>
<p>This produces the following output.</p>
<pre><code>$ bash foo.sh
foo... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,777 | bash | # IFS=: leads to different behavior while looping over colon-separated values
### Experiment 1
Here is my first script in file named `foo.sh`.
```
IFS=:
for i in foo:bar:baz
do
echo $i
done
```
This produces the following output.
```
$ bash foo.sh
foo bar baz
```
### Experiment 2
This is my second script.
`... | I found this a very interesting experiment.
Thank you for that.
---
To understand what is going on,
the relevant section from `man bash` is this:
> ```
> Word Splitting
> The shell scans the results of parameter expansion, command substitu-
> tion, and arithmetic expansion that did not occur within d... |
45422255 | Determine if windows is currently playing sound | 12 | 2017-07-31 17:48:45 | <p>So I've been pondering on this problem for a while and I can't figure out what the right way to go about this is. I want to determine if Windows is outputting sound at a certain time using a <code>Powershell</code> script. I can determine whether or not the audio driver has an error, but I cannot for the life of me ... | 6,991 | 7,195,907 | 2017-08-08 21:08:23 | 45,493,621 | 16 | 2017-08-03 20:04:29 | 5,229,138 | 2017-08-06 22:35:37 | https://stackoverflow.com/q/45422255 | https://stackoverflow.com/a/45493621 | <p>Here's how to use the code that Simon Mourier provided.</p>
<p>Run the code below:</p>
<pre><code>Add-Type -TypeDefinition @'
using System;
using System.Runtime.InteropServices;
namespace Foo
{
public class Bar
{
public static bool IsWindowsPlayingSound()
{
IMMDeviceEnumerator ... | <p>Here's how to use the code that Simon Mourier provided.</p> <p>Run the code below:</p> <pre><code>Add-Type -TypeDefinition @' using System; using System.Runtime.InteropServices; namespace Foo { public class Bar { public static bool IsWindowsPlayingSound() { IMMDeviceEnumerator ... | 1, 64, 526, 24067, 34595 | .net, powershell, powershell-2.0, windows, windows-7 | <h1>Determine if windows is currently playing sound</h1>
<p>So I've been pondering on this problem for a while and I can't figure out what the right way to go about this is. I want to determine if Windows is outputting sound at a certain time using a <code>Powershell</code> script. I can determine whether or not the au... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,778 | bash | # Determine if windows is currently playing sound
So I've been pondering on this problem for a while and I can't figure out what the right way to go about this is. I want to determine if Windows is outputting sound at a certain time using a `Powershell` script. I can determine whether or not the audio driver has an er... | Here's how to use the code that Simon Mourier provided.
Run the code below:
```
Add-Type -TypeDefinition @'
using System;
using System.Runtime.InteropServices;
namespace Foo
{
public class Bar
{
public static bool IsWindowsPlayingSound()
{
IMMDeviceEnumerator enumerator = (IMMDevi... |
40894631 | How does one enter a Python virtualenv when executing a bashscript? | 12 | 2016-11-30 17:30:59 | <p>If one defines which version of python to use in a bash script, it would be </p>
<pre><code>export PYTHON = "/path/python/python-3.5.1/bin/python"
</code></pre>
<p>But for Python virtualenv's, one executes these commands in the command line</p>
<pre><code>cd /path/pathto/virtualenv
source activate
cd another_dire... | 19,883 | 4,596,596 | 2025-03-04 12:52:00 | 40,896,676 | 16 | 2016-11-30 19:33:04 | 674,064 | 2019-08-12 14:49:59 | https://stackoverflow.com/q/40894631 | https://stackoverflow.com/a/40896676 | <p>We have to distinguish two cases here:</p>
<ol>
<li>You want to use/call python (or python-based tools) in your bash script, but python or those tools should be taken from and run in a virtualenv</li>
<li>You want a script that, amongst other things, lets the shell from which you call it enter the virtualenv, so th... | <p>We have to distinguish two cases here:</p> <ol> <li>You want to use/call python (or python-based tools) in your bash script, but python or those tools should be taken from and run in a virtualenv</li> <li>You want a script that, amongst other things, lets the shell from which you call it enter the virtualenv, so th... | 16, 387, 14529 | bash, python, virtualenv | <h1>How does one enter a Python virtualenv when executing a bashscript?</h1>
<p>If one defines which version of python to use in a bash script, it would be </p>
<pre><code>export PYTHON = "/path/python/python-3.5.1/bin/python"
</code></pre>
<p>But for Python virtualenv's, one executes these commands in the command li... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,779 | bash | # How does one enter a Python virtualenv when executing a bashscript?
If one defines which version of python to use in a bash script, it would be
```
export PYTHON = "/path/python/python-3.5.1/bin/python"
```
But for Python virtualenv's, one executes these commands in the command line
```
cd /path/pathto/virtualenv... | We have to distinguish two cases here:
1. You want to use/call python (or python-based tools) in your bash script, but python or those tools should be taken from and run in a virtualenv
2. You want a script that, amongst other things, lets the shell from which you call it enter the virtualenv, so that you can interact... |
40787766 | `Add-Type` C# 6+ features throwing errors | 12 | 2016-11-24 13:33:21 | <p>I am trying to compile <a href="/questions/tagged/c%23" class="post-tag" title="show questions tagged 'c#'" rel="tag">c#</a> source code in <a href="/questions/tagged/powershell" class="post-tag" title="show questions tagged 'powershell'" rel="tag">powershell</a> by using this command:</p>
<pre><cod... | 5,124 | 960,055 | 2023-10-21 13:03:57 | 40,789,694 | 16 | 2016-11-24 15:10:11 | 993,547 | 2016-11-24 15:10:11 | https://stackoverflow.com/q/40787766 | https://stackoverflow.com/a/40789694 | <p><a href="https://msdn.microsoft.com/en-us/powershell/reference/5.1/microsoft.powershell.utility/add-type" rel="noreferrer">Powershell uses <code>CodeDomProvider</code> to compile their assemblies.</a> The version provided with the framework just supports C# 5, so no new features are available by default.</p>
<p>How... | <p><a href="https://msdn.microsoft.com/en-us/powershell/reference/5.1/microsoft.powershell.utility/add-type" rel="noreferrer">Powershell uses <code>CodeDomProvider</code> to compile their assemblies.</a> The version provided with the framework just supports C# 5, so no new features are available by default.</p> <p>How... | 9, 526, 74656 | c#, powershell, roslyn | <h1>`Add-Type` C# 6+ features throwing errors</h1>
<p>I am trying to compile <a href="/questions/tagged/c%23" class="post-tag" title="show questions tagged 'c#'" rel="tag">c#</a> source code in <a href="/questions/tagged/powershell" class="post-tag" title="show questions tagged 'powershell'" rel="tag">p... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,780 | bash | # `Add-Type` C# 6+ features throwing errors
I am trying to compile [c#](/questions/tagged/c%23 "show questions tagged 'c#'") source code in [powershell](/questions/tagged/powershell "show questions tagged 'powershell'") by using this command:
```
Add-Type -ReferencedAssemblies $assemblies -TypeDefinition $source
```
... | [Powershell uses `CodeDomProvider` to compile their assemblies.](https://msdn.microsoft.com/en-us/powershell/reference/5.1/microsoft.powershell.utility/add-type) The version provided with the framework just supports C# 5, so no new features are available by default.
However, if you provide another `CodeDomProvider`, y... |
36733777 | Error on "docker-compose" when I use by pipe with sh ( echo "docker-compose... " | sh ) | 12 | 2016-04-20 04:23:42 | <p>I've a application which has multi container.
to easy installation, I decide to use packaging image.
what I expected is like below</p>
<pre><code>$ docker run my_application install | sh
</code></pre>
<p>-> pull all related images from registry</p>
<pre><code>$ docker run my_application up | sh
</code></pre>
<... | 9,484 | 6,228,117 | 2018-08-10 12:18:13 | 37,782,095 | 16 | 2016-06-13 05:00:36 | 10,831 | 2016-06-13 05:00:36 | https://stackoverflow.com/q/36733777 | https://stackoverflow.com/a/37782095 | <p>This is an <a href="https://github.com/docker/compose/issues/3352" rel="noreferrer">open bug</a> in docker-compose.</p>
<p>As a workaround, you can pass the <code>-T</code> option to <code>docker-compose exec</code>:</p>
<pre><code>$ docker-compose exec --help
[...]
-T Disable pseudo-tty allocation.... | <p>This is an <a href="https://github.com/docker/compose/issues/3352" rel="noreferrer">open bug</a> in docker-compose.</p> <p>As a workaround, you can pass the <code>-T</code> option to <code>docker-compose exec</code>:</p> <pre><code>$ docker-compose exec --help [...] -T Disable pseudo-tty allocation.... | 16, 5813, 10327, 90304, 110604 | docker, docker-compose, pipe, python, sh | <h1>Error on "docker-compose" when I use by pipe with sh ( echo "docker-compose... " | sh )</h1>
<p>I've a application which has multi container.
to easy installation, I decide to use packaging image.
what I expected is like below</p>
<pre><code>$ docker run my_application install | sh
</code></pre>
<p>-> pull all ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,781 | bash | # Error on "docker-compose" when I use by pipe with sh ( echo "docker-compose... " | sh )
I've a application which has multi container.
to easy installation, I decide to use packaging image.
what I expected is like below
```
$ docker run my_application install | sh
```
-> pull all related images from registry
```
$... | This is an [open bug](https://github.com/docker/compose/issues/3352) in docker-compose.
As a workaround, you can pass the `-T` option to `docker-compose exec`:
```
$ docker-compose exec --help
[...]
-T Disable pseudo-tty allocation. By default `docker-compose exec`
allocates a TTY.
``... |
37731609 | Curl: don't wait for response | 12 | 2016-06-09 16:32:53 | <p>I currently have a shell script which relies on a curl command like this:</p>
<pre><code>curl --request POST -u name:pass -H "Content-Type: application/json"
--data "{data}" https://url.com --cacert ./my_crt
</code></pre>
<p>I don't need the response of the command, and this command is in a big for loop, so waiti... | 62,189 | 5,362,438 | 2016-06-09 18:56:18 | 37,734,083 | 16 | 2016-06-09 18:56:18 | 1,899,640 | 2016-06-09 18:56:18 | https://stackoverflow.com/q/37731609 | https://stackoverflow.com/a/37734083 | <p>If you have a large number of requests you want to issue quickly, and you don't care about the output, there are two things you should do:</p>
<ol>
<li><strong>Do more requests with the same connection.</strong></li>
</ol>
<p>For small requests, it's generally much faster to do 10 requests each on 1 connection, th... | <p>If you have a large number of requests you want to issue quickly, and you don't care about the output, there are two things you should do:</p> <ol> <li><strong>Do more requests with the same connection.</strong></li> </ol> <p>For small requests, it's generally much faster to do 10 requests each on 1 connection, th... | 387, 390 | bash, shell | <h1>Curl: don't wait for response</h1>
<p>I currently have a shell script which relies on a curl command like this:</p>
<pre><code>curl --request POST -u name:pass -H "Content-Type: application/json"
--data "{data}" https://url.com --cacert ./my_crt
</code></pre>
<p>I don't need the response of the command, and this... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,782 | bash | # Curl: don't wait for response
I currently have a shell script which relies on a curl command like this:
```
curl --request POST -u name:pass -H "Content-Type: application/json"
--data "{data}" https://url.com --cacert ./my_crt
```
I don't need the response of the command, and this command is in a big for loop, so... | If you have a large number of requests you want to issue quickly, and you don't care about the output, there are two things you should do:
1. **Do more requests with the same connection.**
For small requests, it's generally much faster to do 10 requests each on 1 connection, than 1 request each on 10 connections. For... |
37378375 | "cannot execute binary file" when trying to run a shell script on linux | 12 | 2016-05-22 18:58:39 | <p>I am very new to linux and shell scriprting.
I am trying to run a shellscript from secure shell (ssh) on linux using following commands:</p>
<pre><code>chmod +x path/to/mynewshell.sh
sh path/to/mynewshell.sh
</code></pre>
<p>I get this error: </p>
<pre><code>path/to/mynewshell.sh: path/to/mynewshell.sh: cannot e... | 159,788 | 6,237,321 | 2022-10-28 13:09:45 | 37,378,396 | 16 | 2016-05-22 19:00:52 | 3,744,681 | 2016-05-22 21:31:42 | https://stackoverflow.com/q/37378375 | https://stackoverflow.com/a/37378396 | <p><code>chmod -x</code> removes execution permission from a file. Do this:</p>
<pre><code>chmod +x path/to/mynewshell.sh
</code></pre>
<p>And run it with</p>
<pre><code>/path/to/mynewshell.sh
</code></pre>
<p>As the error report says, you script is not actually a script, it's a binary file.</p>
| <p><code>chmod -x</code> removes execution permission from a file. Do this:</p> <pre><code>chmod +x path/to/mynewshell.sh </code></pre> <p>And run it with</p> <pre><code>/path/to/mynewshell.sh </code></pre> <p>As the error report says, you script is not actually a script, it's a binary file.</p> | 58, 387, 390 | bash, linux, shell | <h1>"cannot execute binary file" when trying to run a shell script on linux</h1>
<p>I am very new to linux and shell scriprting.
I am trying to run a shellscript from secure shell (ssh) on linux using following commands:</p>
<pre><code>chmod +x path/to/mynewshell.sh
sh path/to/mynewshell.sh
</code></pre>
<p>I get th... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,783 | bash | # "cannot execute binary file" when trying to run a shell script on linux
I am very new to linux and shell scriprting.
I am trying to run a shellscript from secure shell (ssh) on linux using following commands:
```
chmod +x path/to/mynewshell.sh
sh path/to/mynewshell.sh
```
I get this error:
```
path/to/mynewshell... | `chmod -x` removes execution permission from a file. Do this:
```
chmod +x path/to/mynewshell.sh
```
And run it with
```
/path/to/mynewshell.sh
```
As the error report says, you script is not actually a script, it's a binary file. |
29927005 | How to check if a files exists in a specific directory in a bash script? | 12 | 2015-04-28 18:18:42 | <p>This is what I have been trying and it is unsuccessful. If I wanted to check if a file exists in the ~/.example directory</p>
<pre><code>FILE=$1
if [ -e $FILE ~/.example ]; then
echo "File exists"
else
echo "File does not exist"
fi
</code></pre>
| 38,635 | 4,843,328 | 2020-03-14 06:09:00 | 29,927,050 | 16 | 2015-04-28 18:21:34 | 4,687,135 | 2017-05-14 23:29:12 | https://stackoverflow.com/q/29927005 | https://stackoverflow.com/a/29927050 | <p>You can use <code>$FILE</code> to concatenate with the directory to make the full path as below.</p>
<pre><code>FILE="$1"
if [ -e ~/.myexample/"$FILE" ]; then
echo "File exists"
else
echo "File does not exist"
fi
</code></pre>
| <p>You can use <code>$FILE</code> to concatenate with the directory to make the full path as below.</p> <pre><code>FILE="$1" if [ -e ~/.myexample/"$FILE" ]; then echo "File exists" else echo "File does not exist" fi </code></pre> | 58, 387, 391, 531, 5310 | bash, file, linux, scripting, terminal | <h1>How to check if a files exists in a specific directory in a bash script?</h1>
<p>This is what I have been trying and it is unsuccessful. If I wanted to check if a file exists in the ~/.example directory</p>
<pre><code>FILE=$1
if [ -e $FILE ~/.example ]; then
echo "File exists"
else
echo "File does not ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,784 | bash | # How to check if a files exists in a specific directory in a bash script?
This is what I have been trying and it is unsuccessful. If I wanted to check if a file exists in the ~/.example directory
```
FILE=$1
if [ -e $FILE ~/.example ]; then
echo "File exists"
else
echo "File does not exist"
fi
``` | You can use `$FILE` to concatenate with the directory to make the full path as below.
```
FILE="$1"
if [ -e ~/.myexample/"$FILE" ]; then
echo "File exists"
else
echo "File does not exist"
fi
``` |
28899561 | Temporarily disable 'set-e' / 'set -o errexit' in bash? | 12 | 2015-03-06 13:15:10 | <p>I have a script that uses <code>killall</code> to make sure an app isn't already running before starting it:</p>
<pre><code>#!/bin/bash
set -e
some_command
another_command
sudo killall myapp # this causes the script to fail if myapp isn't running
sleep 10
myapp start
</code></pre>
<p>However, if myapp isn't run... | 7,600 | 1,033,422 | 2019-02-27 14:44:13 | 28,899,718 | 16 | 2015-03-06 13:23:49 | 2,807,880 | 2019-02-27 14:44:13 | https://stackoverflow.com/q/28899561 | https://stackoverflow.com/a/28899718 | <p>If you want just allow this single command to end with error and consider it normal you can:</p>
<pre><code>sudo killall myapp || :
</code></pre>
<p>: is a noop in bash. Effectively the line above is as explicitly as possible expressing "on error do nothing". You can achieve the same effect with maybe a little mor... | <p>If you want just allow this single command to end with error and consider it normal you can:</p> <pre><code>sudo killall myapp || : </code></pre> <p>: is a noop in bash. Effectively the line above is as explicitly as possible expressing "on error do nothing". You can achieve the same effect with maybe a little mor... | 58, 387, 549 | bash, linux, ubuntu | <h1>Temporarily disable 'set-e' / 'set -o errexit' in bash?</h1>
<p>I have a script that uses <code>killall</code> to make sure an app isn't already running before starting it:</p>
<pre><code>#!/bin/bash
set -e
some_command
another_command
sudo killall myapp # this causes the script to fail if myapp isn't running
s... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,785 | bash | # Temporarily disable 'set-e' / 'set -o errexit' in bash?
I have a script that uses `killall` to make sure an app isn't already running before starting it:
```
#!/bin/bash
set -e
some_command
another_command
sudo killall myapp # this causes the script to fail if myapp isn't running
sleep 10
myapp start
```
Howeve... | If you want just allow this single command to end with error and consider it normal you can:
```
sudo killall myapp || :
```
: is a noop in bash. Effectively the line above is as explicitly as possible expressing "on error do nothing". You can achieve the same effect with maybe a little more idiomatic:
```
sudo kill... |
28846194 | Generate Machine Key using Power shell | 12 | 2015-03-04 03:29:12 | <p>I am trying to generate machine key to share between a few machine, after a quick google search i found this <a href="http://support.microsoft.com/kb/2915218#AppendixA" rel="noreferrer">article KB 2915218, Appendix A </a>.</p>
<ol>
<li>I copied the code and save as .ps1 extension which i believe is power shell exte... | 20,403 | 1,172,730 | 2020-04-17 03:23:27 | 28,847,132 | 16 | 2015-03-04 05:18:22 | 3,517,626 | 2015-03-04 05:26:59 | https://stackoverflow.com/q/28846194 | https://stackoverflow.com/a/28847132 | <p>The script contains a function so you'll have to first load the script and then run the function for it to work.</p>
<p>First we'll have to load the file, i called my ps1 "MachineKey" so this is how i load it</p>
<pre><code>PS E:\> . .\MachineKey.ps1
</code></pre>
<p>Once i've loaded the file if i want to run ... | <p>The script contains a function so you'll have to first load the script and then run the function for it to work.</p> <p>First we'll have to load the file, i called my ps1 "MachineKey" so this is how i load it</p> <pre><code>PS E:\> . .\MachineKey.ps1 </code></pre> <p>Once i've loaded the file if i want to run ... | 526 | powershell | <h1>Generate Machine Key using Power shell</h1>
<p>I am trying to generate machine key to share between a few machine, after a quick google search i found this <a href="http://support.microsoft.com/kb/2915218#AppendixA" rel="noreferrer">article KB 2915218, Appendix A </a>.</p>
<ol>
<li>I copied the code and save as .p... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,786 | bash | # Generate Machine Key using Power shell
I am trying to generate machine key to share between a few machine, after a quick google search i found this [article KB 2915218, Appendix A](http://support.microsoft.com/kb/2915218#AppendixA) .
1. I copied the code and save as .ps1 extension which i believe is power shell ext... | The script contains a function so you'll have to first load the script and then run the function for it to work.
First we'll have to load the file, i called my ps1 "MachineKey" so this is how i load it
```
PS E:\> . .\MachineKey.ps1
```
Once i've loaded the file if i want to run the function called "Generate-Machine... |
27660888 | IntelliJ 14 on OSX: How to specify version of SVN client used through the IDE | 12 | 2014-12-26 19:04:19 | <p>I'm on OSX Yosemite which came with a default SVN client 1.7.x.<br/>
I used macports to install 1.8.11 and checked out a repo using 1.8.11 (through zshell).<br/>
When i use the <code>svn</code> command through the shell (both on zshell and bash), it points to 1.8.11.<br/></p>
<p>However in IntelliJ 14, it reluctant... | 4,196 | 4,271,755 | 2015-08-13 11:41:37 | 27,661,045 | 16 | 2014-12-26 19:21:25 | 4,271,755 | 2014-12-26 19:21:25 | https://stackoverflow.com/q/27660888 | https://stackoverflow.com/a/27661045 | <p>Found one working solution.<br/>
All I really had to do is use the full path of <code>svn</code> 1.8.11 (ie. <code>/opt/local/bin/svn</code>) installed by macports, under Preferences -> Version Control -> Subversion -> Use command line client<br/></p>
<p>Though I still don't understand why it didn't pick this up by... | <p>Found one working solution.<br/> All I really had to do is use the full path of <code>svn</code> 1.8.11 (ie. <code>/opt/local/bin/svn</code>) installed by macports, under Preferences -> Version Control -> Subversion -> Use command line client<br/></p> <p>Though I still don't understand why it didn't pick this up by... | 63, 387, 8945, 93854 | bash, intellij-idea, oh-my-zsh, svn | <h1>IntelliJ 14 on OSX: How to specify version of SVN client used through the IDE</h1>
<p>I'm on OSX Yosemite which came with a default SVN client 1.7.x.<br/>
I used macports to install 1.8.11 and checked out a repo using 1.8.11 (through zshell).<br/>
When i use the <code>svn</code> command through the shell (both on z... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,787 | bash | # IntelliJ 14 on OSX: How to specify version of SVN client used through the IDE
I'm on OSX Yosemite which came with a default SVN client 1.7.x.
I used macports to install 1.8.11 and checked out a repo using 1.8.11 (through zshell).
When i use the `svn` command through the shell (both on zshell and bash), it points... | Found one working solution.
All I really had to do is use the full path of `svn` 1.8.11 (ie. `/opt/local/bin/svn`) installed by macports, under Preferences -> Version Control -> Subversion -> Use command line client
Though I still don't understand why it didn't pick this up by default even though the shells did.
![... |
26624116 | How can I import data to Mongodb from Json file using java | 12 | 2014-10-29 06:39:30 | <p>I am struggling with importing data into <code>Mongodb</code> from a <code>Json</code> file.<br>
I can do the same in command line by using <code>mongoimport command</code>.<br>
I explored and tried lot but not able to import from Json file using java.</p>
<p><strong>sample.json</strong></p>
<pre><code> { "test... | 24,667 | 1,491,414 | 2020-12-23 22:29:32 | 26,626,377 | 16 | 2014-10-29 09:11:00 | 3,943,271 | 2016-01-22 08:10:01 | https://stackoverflow.com/q/26624116 | https://stackoverflow.com/a/26626377 | <p>Suppose you can read the JSON string respectively. For example, you read the first JSON text</p>
<pre><code>{ "test_id" : 1245362, "name" : "ganesh", "age" : "28", "Job" :
{"company name" : "company1", "designation" : "SSE" }
}
</code></pre>
<p>and assign it to a variable (String json1), the next step is to p... | <p>Suppose you can read the JSON string respectively. For example, you read the first JSON text</p> <pre><code>{ "test_id" : 1245362, "name" : "ganesh", "age" : "28", "Job" : {"company name" : "company1", "designation" : "SSE" } } </code></pre> <p>and assign it to a variable (String json1), the next step is to p... | 17, 390, 1231, 1508, 30073 | command-line, java, json, mongodb, shell | <h1>How can I import data to Mongodb from Json file using java</h1>
<p>I am struggling with importing data into <code>Mongodb</code> from a <code>Json</code> file.<br>
I can do the same in command line by using <code>mongoimport command</code>.<br>
I explored and tried lot but not able to import from Json file using ja... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,788 | bash | # How can I import data to Mongodb from Json file using java
I am struggling with importing data into `Mongodb` from a `Json` file.
I can do the same in command line by using `mongoimport command`.
I explored and tried lot but not able to import from Json file using java.
**sample.json**
```
{ "test_id" : 12... | Suppose you can read the JSON string respectively. For example, you read the first JSON text
```
{ "test_id" : 1245362, "name" : "ganesh", "age" : "28", "Job" :
{"company name" : "company1", "designation" : "SSE" }
}
```
and assign it to a variable (String json1), the next step is to parse it,
```
DBObject dbo ... |
26604333 | Change the system version of nodejs - ubuntu | 12 | 2014-10-28 09:03:43 | <p>I just started to use node.js in local projects few days ago. My application works good, if I run it from command shell</p>
<pre><code>nvm run 0.10.32 ./bin/www app
</code></pre>
<p>or </p>
<pre><code>node ./bin/www app
</code></pre>
<p>So, it works with node version 0.10.xx or higher. But there is a problem: I ... | 14,956 | 2,861,891 | 2021-12-20 06:27:11 | 26,613,584 | 16 | 2014-10-28 16:31:34 | 745,121 | 2014-10-28 16:31:34 | https://stackoverflow.com/q/26604333 | https://stackoverflow.com/a/26613584 | <p>Verify that default node is really coming from nvm with <code>which node</code>, if its not, you can safely run :</p>
<pre><code>rm `which node`
</code></pre>
<p>To set the default node version with nvm use :</p>
<pre><code>nvm alias default 0.10.32
</code></pre>
<p>If you have many apps that use different node ... | <p>Verify that default node is really coming from nvm with <code>which node</code>, if its not, you can safely run :</p> <pre><code>rm `which node` </code></pre> <p>To set the default node version with nvm use :</p> <pre><code>nvm alias default 0.10.32 </code></pre> <p>If you have many apps that use different node ... | 390, 549, 46426 | node.js, shell, ubuntu | <h1>Change the system version of nodejs - ubuntu</h1>
<p>I just started to use node.js in local projects few days ago. My application works good, if I run it from command shell</p>
<pre><code>nvm run 0.10.32 ./bin/www app
</code></pre>
<p>or </p>
<pre><code>node ./bin/www app
</code></pre>
<p>So, it works with node... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,789 | bash | # Change the system version of nodejs - ubuntu
I just started to use node.js in local projects few days ago. My application works good, if I run it from command shell
```
nvm run 0.10.32 ./bin/www app
```
or
```
node ./bin/www app
```
So, it works with node version 0.10.xx or higher. But there is a problem: I can'... | Verify that default node is really coming from nvm with `which node`, if its not, you can safely run :
```
rm `which node`
```
To set the default node version with nvm use :
```
nvm alias default 0.10.32
```
If you have many apps that use different node version, add a .npmrc in the root directory in each of them. .... |
22634065 | Bash 'read' command does not accept -i parameter on Mac. Any alternatives? | 12 | 2014-03-25 12:04:44 | <p>I have a bash script that works fine on my work Ubuntu machine, but sadly breaks when I try and run it on my Mac OSX <strike>Lion</strike> Mountain Lion laptop. The line that kills it is this:</p>
<pre><code>while [[ -z "$SSHFS_PATH" ]] ; do
read -e -p "Please enter the path on which to mount your file system: `e... | 12,144 | 1,025,702 | 2018-02-25 19:21:48 | 22,635,266 | 16 | 2014-03-25 12:54:25 | 612,462 | 2014-03-25 12:54:25 | https://stackoverflow.com/q/22634065 | https://stackoverflow.com/a/22635266 | <p>Mac OS X 10.7 Lion (and to this date all more recent versions as well, thanks @kojiro) ships with <code>bash 3.2</code> whereas <code>read -i</code> was introduced with <code>bash 4.0-alpha</code> (see the <a href="http://tiswww.case.edu/php/chet/bash/CHANGES" rel="noreferrer">ChangeLog</a>).</p>
<p>You can either ... | <p>Mac OS X 10.7 Lion (and to this date all more recent versions as well, thanks @kojiro) ships with <code>bash 3.2</code> whereas <code>read -i</code> was introduced with <code>bash 4.0-alpha</code> (see the <a href="http://tiswww.case.edu/php/chet/bash/CHANGES" rel="noreferrer">ChangeLog</a>).</p> <p>You can either ... | 369, 387 | bash, macos | <h1>Bash 'read' command does not accept -i parameter on Mac. Any alternatives?</h1>
<p>I have a bash script that works fine on my work Ubuntu machine, but sadly breaks when I try and run it on my Mac OSX <strike>Lion</strike> Mountain Lion laptop. The line that kills it is this:</p>
<pre><code>while [[ -z "$SSHFS_PATH... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,790 | bash | # Bash 'read' command does not accept -i parameter on Mac. Any alternatives?
I have a bash script that works fine on my work Ubuntu machine, but sadly breaks when I try and run it on my Mac OSX Lion Mountain Lion laptop. The line that kills it is this:
```
while [[ -z "$SSHFS_PATH" ]] ; do
read -e -p "Please enter ... | Mac OS X 10.7 Lion (and to this date all more recent versions as well, thanks @kojiro) ships with `bash 3.2` whereas `read -i` was introduced with `bash 4.0-alpha` (see the [ChangeLog](http://tiswww.case.edu/php/chet/bash/CHANGES)).
You can either install a more recent version of `bash` using [`homebrew`](http://brew.... |
18647841 | Retrieve exit status from php script inside of shell script | 12 | 2013-09-06 00:04:26 | <p>I have a bash shell script that calls a few PHP scripts like this.</p>
<pre><code>#!/bin/bash
php -f somescript.php
php -f anotherscript.php
</code></pre>
<p>I want to compose an error log and/or an activity report based on the results of those scripts.</p>
<p>Is there any way I can get the exit status of the p... | 13,830 | 631,764 | 2021-06-01 07:17:17 | 21,118,232 | 16 | 2014-01-14 16:10:15 | 1,023,107 | 2015-11-18 00:45:33 | https://stackoverflow.com/q/18647841 | https://stackoverflow.com/a/21118232 | <p>You can easily catch the output using the <em>backtick</em> operator, and get the exit code of the <strong>last command</strong> by using <em>$?</em>:</p>
<pre><code>#!/bin/bash
output=`php -f somescript.php`
exitcode=$?
anotheroutput=`php -f anotherscript.php`
anotherexitcode=$?
</code></pre>
| <p>You can easily catch the output using the <em>backtick</em> operator, and get the exit code of the <strong>last command</strong> by using <em>$?</em>:</p> <pre><code>#!/bin/bash output=`php -f somescript.php` exitcode=$? anotheroutput=`php -f anotherscript.php` anotherexitcode=$? </code></pre> | 5, 387, 390, 10021 | bash, exit-code, php, shell | <h1>Retrieve exit status from php script inside of shell script</h1>
<p>I have a bash shell script that calls a few PHP scripts like this.</p>
<pre><code>#!/bin/bash
php -f somescript.php
php -f anotherscript.php
</code></pre>
<p>I want to compose an error log and/or an activity report based on the results of those... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,791 | bash | # Retrieve exit status from php script inside of shell script
I have a bash shell script that calls a few PHP scripts like this.
```
#!/bin/bash
php -f somescript.php
php -f anotherscript.php
```
I want to compose an error log and/or an activity report based on the results of those scripts.
Is there any way I can... | You can easily catch the output using the *backtick* operator, and get the exit code of the **last command** by using *$?*:
```
#!/bin/bash
output=`php -f somescript.php`
exitcode=$?
anotheroutput=`php -f anotherscript.php`
anotherexitcode=$?
``` |
21034043 | How to use Jenkins environment variable in shell script? | 12 | 2014-01-10 00:26:56 | <p>I want to update a java file with the jenkins build number. I plan on using a shell script to sed the value to the correct build number. I'm currently doing this:</p>
<pre><code>sed -i 's/Version 3.0/Version $BUILD_DISPLAY_NAME/g'
/var/lib/jenkins/jobs/AndroidTest/workspace/xxx/res/values/strings.xml
</code></pre... | 26,399 | 542,322 | 2018-02-21 15:56:23 | 21,034,720 | 16 | 2014-01-10 01:39:00 | 1,899,640 | 2014-01-10 01:39:00 | https://stackoverflow.com/q/21034043 | https://stackoverflow.com/a/21034720 | <p>As <a href="http://www.shellcheck.net">shellcheck</a> would tell you, expansions don't happen in single quotes. Use double quotes instead: </p>
<pre><code>sed -i "s/Version 3.0/Version $BUILD_DISPLAY_NAME/g" /var/lib/jenkins/jobs/AndroidTest/workspace/xxx/res/values/strings.xml
</code></pre>
| <p>As <a href="http://www.shellcheck.net">shellcheck</a> would tell you, expansions don't happen in single quotes. Use double quotes instead: </p> <pre><code>sed -i "s/Version 3.0/Version $BUILD_DISPLAY_NAME/g" /var/lib/jenkins/jobs/AndroidTest/workspace/xxx/res/values/strings.xml </code></pre> | 387, 64999 | bash, jenkins | <h1>How to use Jenkins environment variable in shell script?</h1>
<p>I want to update a java file with the jenkins build number. I plan on using a shell script to sed the value to the correct build number. I'm currently doing this:</p>
<pre><code>sed -i 's/Version 3.0/Version $BUILD_DISPLAY_NAME/g'
/var/lib/jenkins/... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,792 | bash | # How to use Jenkins environment variable in shell script?
I want to update a java file with the jenkins build number. I plan on using a shell script to sed the value to the correct build number. I'm currently doing this:
```
sed -i 's/Version 3.0/Version $BUILD_DISPLAY_NAME/g'
/var/lib/jenkins/jobs/AndroidTest/works... | As [shellcheck](http://www.shellcheck.net) would tell you, expansions don't happen in single quotes. Use double quotes instead:
```
sed -i "s/Version 3.0/Version $BUILD_DISPLAY_NAME/g" /var/lib/jenkins/jobs/AndroidTest/workspace/xxx/res/values/strings.xml
``` |
19912681 | Build a string in Bash with newlines | 12 | 2013-11-11 17:50:52 | <p>I'm going through a script in Bash where, depending on the conditionals, I want to append to a variable different things and then display it at the very end. Something like this:</p>
<pre><code>VAR="The "
if [[ whatever ]]; then
VAR="$VAR cat wears a mask"
elif [[ whatevs ]]; then
VAR=&q... | 18,294 | 970,171 | 2022-06-17 20:16:06 | 19,912,771 | 16 | 2013-11-11 17:57:12 | 1,815,797 | 2022-03-27 15:47:10 | https://stackoverflow.com/q/19912681 | https://stackoverflow.com/a/19912771 | <p>Using <a href="http://www.gnu.org/software/bash/manual/bashref.html#ANSI_002dC-Quoting" rel="noreferrer">ANSI C quoting</a>:</p>
<pre><code>var="$var"$'\n'"in a box"
</code></pre>
<p>You could put the <code>$'\n'</code> in a variable:</p>
<pre><code>newline=$'\n'
var="$var${newline}in a box&... | <p>Using <a href="http://www.gnu.org/software/bash/manual/bashref.html#ANSI_002dC-Quoting" rel="noreferrer">ANSI C quoting</a>:</p> <pre><code>var="$var"$'\n'"in a box" </code></pre> <p>You could put the <code>$'\n'</code> in a variable:</p> <pre><code>newline=$'\n' var="$var${newline}in a box&... | 387, 390, 3705 | bash, newline, shell | <h1>Build a string in Bash with newlines</h1>
<p>I'm going through a script in Bash where, depending on the conditionals, I want to append to a variable different things and then display it at the very end. Something like this:</p>
<pre><code>VAR="The "
if [[ whatever ]]; then
VAR="$VAR cat wears a ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,793 | bash | # Build a string in Bash with newlines
I'm going through a script in Bash where, depending on the conditionals, I want to append to a variable different things and then display it at the very end. Something like this:
```
VAR="The "
if [[ whatever ]]; then
VAR="$VAR cat wears a mask"
elif [[ whatevs ]]; then
... | Using [ANSI C quoting](http://www.gnu.org/software/bash/manual/bashref.html#ANSI_002dC-Quoting):
```
var="$var"$'\n'"in a box"
```
You could put the `$'\n'` in a variable:
```
newline=$'\n'
var="$var${newline}in a box"
```
By the way, in this case, it's better to use the concatenation operator:
```
var+="${newline... |
19302572 | How to put sshpass command inside a bash script? | 12 | 2013-10-10 17:40:37 | <p>I am trying to run a sshpass command inside a bash script but it isn't working.</p>
<p>If I run the same command from the terminal it works fine but running it in a bash script it doesn't.</p>
<pre><code>#! /bin/bash
sshpass -p 'password' ssh user@host command
</code></pre>
<p>I am aware of the security issues b... | 133,704 | 2,764,739 | 2017-01-17 10:37:03 | 19,303,264 | 16 | 2013-10-10 18:19:34 | 220,710 | 2013-10-10 18:19:34 | https://stackoverflow.com/q/19302572 | https://stackoverflow.com/a/19303264 | <p>Do <code>which sshpass</code> in your command line to get the absolute path to <code>sshpass</code> and replace it in the bash script. </p>
<p>You should also probably do the same with the <code>command</code> you are trying to run.</p>
<p>The problem might be that it is not finding it.</p>
| <p>Do <code>which sshpass</code> in your command line to get the absolute path to <code>sshpass</code> and replace it in the bash script. </p> <p>You should also probably do the same with the <code>command</code> you are trying to run.</p> <p>The problem might be that it is not finding it.</p> | 386, 387 | bash, ssh | <h1>How to put sshpass command inside a bash script?</h1>
<p>I am trying to run a sshpass command inside a bash script but it isn't working.</p>
<p>If I run the same command from the terminal it works fine but running it in a bash script it doesn't.</p>
<pre><code>#! /bin/bash
sshpass -p 'password' ssh user@host com... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,794 | bash | # How to put sshpass command inside a bash script?
I am trying to run a sshpass command inside a bash script but it isn't working.
If I run the same command from the terminal it works fine but running it in a bash script it doesn't.
```
#! /bin/bash
sshpass -p 'password' ssh user@host command
```
I am aware of the... | Do `which sshpass` in your command line to get the absolute path to `sshpass` and replace it in the bash script.
You should also probably do the same with the `command` you are trying to run.
The problem might be that it is not finding it. |
17557487 | Linux: The command ls -la shows a file pointing to another file. What does that mean? | 12 | 2013-07-09 20:24:16 | <p>When I type <code>ls -la</code> to list all the files, I see this:</p>
<pre><code>11 Jul 9 12:04 libcrypto.so -> libcrypto.so.0
</code></pre>
<p>I tried to change the name of libcrypto:</p>
<pre><code>mv libcryto.so libpmcrypto.so
</code></pre>
<p>And now it shows:</p>
<pre><code>11 Jul 9 12:04 libpmcrypto... | 28,985 | 1,522,257 | 2013-07-26 15:13:58 | 17,557,657 | 16 | 2013-07-09 20:31:55 | 18,796 | 2013-07-09 20:57:00 | https://stackoverflow.com/q/17557487 | https://stackoverflow.com/a/17557657 | <p>The file in question is a symbolic link. This is conceptually similar to the idea of a shortcut, but it appears to be the real file if you use it (Open it, copy it, etc.). The symbolic link is another name that "points to" the real file. When you do <code>ls -l</code> it also shows you which file is pointed to by... | <p>The file in question is a symbolic link. This is conceptually similar to the idea of a shortcut, but it appears to be the real file if you use it (Open it, copy it, etc.). The symbolic link is another name that "points to" the real file. When you do <code>ls -l</code> it also shows you which file is pointed to by... | 387, 1122, 3589 | bash, ls, symlink | <h1>Linux: The command ls -la shows a file pointing to another file. What does that mean?</h1>
<p>When I type <code>ls -la</code> to list all the files, I see this:</p>
<pre><code>11 Jul 9 12:04 libcrypto.so -> libcrypto.so.0
</code></pre>
<p>I tried to change the name of libcrypto:</p>
<pre><code>mv libcryto.so... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,795 | bash | # Linux: The command ls -la shows a file pointing to another file. What does that mean?
When I type `ls -la` to list all the files, I see this:
```
11 Jul 9 12:04 libcrypto.so -> libcrypto.so.0
```
I tried to change the name of libcrypto:
```
mv libcryto.so libpmcrypto.so
```
And now it shows:
```
11 Jul 9 12:0... | The file in question is a symbolic link. This is conceptually similar to the idea of a shortcut, but it appears to be the real file if you use it (Open it, copy it, etc.). The symbolic link is another name that "points to" the real file. When you do `ls -l` it also shows you which file is pointed to by the link. Renami... |
15439542 | how to use PowerShell to inventory Scheduled Tasks | 12 | 2013-03-15 18:21:46 | <p>Does anyone have a link or script that uses PowerShell to inventory the Scheduled Tasks on a server, including the Action?</p>
<p>I am able to get the Scheduled Service com object and what I would call "top level" properties (name, state, lastruntime), but would like to also get information from the "Actions" part ... | 58,937 | 1,130,790 | 2018-12-13 20:26:14 | 15,449,451 | 16 | 2013-03-16 12:48:29 | 702,944 | 2013-03-16 16:35:20 | https://stackoverflow.com/q/15439542 | https://stackoverflow.com/a/15449451 | <p>This is probably very similar to current answers, but I wrote a quick script to get you going. The problem with your current script is that there is no <code>Actions</code> property in a task. You need to extract it from the xml task-definition that the comobject provides. The following script will return an array o... | <p>This is probably very similar to current answers, but I wrote a quick script to get you going. The problem with your current script is that there is no <code>Actions</code> property in a task. You need to extract it from the xml task-definition that the comobject provides. The following script will return an array o... | 526, 9299 | powershell, scheduled-tasks | <h1>how to use PowerShell to inventory Scheduled Tasks</h1>
<p>Does anyone have a link or script that uses PowerShell to inventory the Scheduled Tasks on a server, including the Action?</p>
<p>I am able to get the Scheduled Service com object and what I would call "top level" properties (name, state, lastruntime), but... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,796 | bash | # how to use PowerShell to inventory Scheduled Tasks
Does anyone have a link or script that uses PowerShell to inventory the Scheduled Tasks on a server, including the Action?
I am able to get the Scheduled Service com object and what I would call "top level" properties (name, state, lastruntime), but would like to a... | This is probably very similar to current answers, but I wrote a quick script to get you going. The problem with your current script is that there is no `Actions` property in a task. You need to extract it from the xml task-definition that the comobject provides. The following script will return an array of objects, one... |
13969817 | Send text file, line by line, with netcat | 12 | 2012-12-20 10:14:36 | <p>I'm trying to send a file, line by line, with the following commands:</p>
<pre><code>nc host port < textfile
cat textfile | nc host port
</code></pre>
<p>I've tried with <em>tail</em> and <em>head</em>, but with the same result: the entire file is sent as a unique line.
The server is listening with a specific d... | 38,230 | 329,584 | 2019-09-12 14:18:49 | 13,971,251 | 16 | 2012-12-20 11:31:27 | 793,796 | 2014-04-01 09:50:04 | https://stackoverflow.com/q/13969817 | https://stackoverflow.com/a/13971251 | <p>Do you HAVE TO use netcat?</p>
<pre><code>cat textfile > /dev/tcp/HOST/PORT
</code></pre>
<p>can also serve your purpose, at least with bash.</p>
<hr>
<blockquote>
<p>I'de like to send, and receive, one by one the lines, not all the file in a single shot.</p>
</blockquote>
<p>Try</p>
<pre><code>while read... | <p>Do you HAVE TO use netcat?</p> <pre><code>cat textfile > /dev/tcp/HOST/PORT </code></pre> <p>can also serve your purpose, at least with bash.</p> <hr> <blockquote> <p>I'de like to send, and receive, one by one the lines, not all the file in a single shot.</p> </blockquote> <p>Try</p> <pre><code>while read... | 34, 390, 24801 | netcat, shell, unix | <h1>Send text file, line by line, with netcat</h1>
<p>I'm trying to send a file, line by line, with the following commands:</p>
<pre><code>nc host port < textfile
cat textfile | nc host port
</code></pre>
<p>I've tried with <em>tail</em> and <em>head</em>, but with the same result: the entire file is sent as a uni... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,797 | bash | # Send text file, line by line, with netcat
I'm trying to send a file, line by line, with the following commands:
```
nc host port < textfile
cat textfile | nc host port
```
I've tried with *tail* and *head*, but with the same result: the entire file is sent as a unique line.
The server is listening with a specific ... | Do you HAVE TO use netcat?
```
cat textfile > /dev/tcp/HOST/PORT
```
can also serve your purpose, at least with bash.
---
> I'de like to send, and receive, one by one the lines, not all the file in a single shot.
Try
```
while read x; do echo "$x" | nc host port; done < textfile
``` |
13962703 | How do I call exec in psake to an executable with a variable path? | 12 | 2012-12-19 23:01:47 | <p>I can't seem to call this executable correctly in my psake deploy script.</p>
<p>If I do this:</p>
<pre><code>exec { "$ArchiverOutputDir\NServiceBus.Host.exe /install" }
</code></pre>
<p>It simply outputs this (and is clearly not calling the executable - just outputting the value of that expression):</p>
<pre><c... | 2,833 | 549 | 2015-03-31 13:01:07 | 13,962,946 | 16 | 2012-12-19 23:28:11 | 153,982 | 2015-03-31 13:01:07 | https://stackoverflow.com/q/13962703 | https://stackoverflow.com/a/13962946 | <p>Classic PowerShell issue. Try this instead:</p>
<pre><code>exec { & "$ArchiverOutputDir\NServiceBus.Host.exe" /install }
</code></pre>
<p>PowerShell not only executes commands, it also evaluates expressions e.g.:</p>
<pre><code>C:\PS> 2 + 2
4
C:\PS> "hello world"
hello world
</code></pre>
<p>What you h... | <p>Classic PowerShell issue. Try this instead:</p> <pre><code>exec { & "$ArchiverOutputDir\NServiceBus.Host.exe" /install } </code></pre> <p>PowerShell not only executes commands, it also evaluates expressions e.g.:</p> <pre><code>C:\PS> 2 + 2 4 C:\PS> "hello world" hello world </code></pre> <p>What you h... | 526, 17062 | powershell, psake | <h1>How do I call exec in psake to an executable with a variable path?</h1>
<p>I can't seem to call this executable correctly in my psake deploy script.</p>
<p>If I do this:</p>
<pre><code>exec { "$ArchiverOutputDir\NServiceBus.Host.exe /install" }
</code></pre>
<p>It simply outputs this (and is clearly not calling ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,798 | bash | # How do I call exec in psake to an executable with a variable path?
I can't seem to call this executable correctly in my psake deploy script.
If I do this:
```
exec { "$ArchiverOutputDir\NServiceBus.Host.exe /install" }
```
It simply outputs this (and is clearly not calling the executable - just outputting the val... | Classic PowerShell issue. Try this instead:
```
exec { & "$ArchiverOutputDir\NServiceBus.Host.exe" /install }
```
PowerShell not only executes commands, it also evaluates expressions e.g.:
```
C:\PS> 2 + 2
4
C:\PS> "hello world"
hello world
```
What you have given to PowerShell at the beginning of a pipeline is a s... |
12750293 | Find line number in a text file - without opening the file | 12 | 2012-10-05 16:22:33 | <p>In a very large file I need to find the position (line number) of a string, then extract the 2 lines above and below that string. </p>
<p>To do this right now - I launch vi, find the string, note it's line number, exit vi, then use sed to extract the lines surrounding that string. </p>
<p>Is there a way to streaml... | 56,590 | 159,610 | 2023-11-23 11:29:50 | 12,750,353 | 16 | 2012-10-05 16:26:44 | 1,014,586 | 2012-10-05 17:18:55 | https://stackoverflow.com/q/12750293 | https://stackoverflow.com/a/12750353 | <p>Maybe using grep like this:</p>
<pre><code>grep -n -2 your_searched_for_string your_large_text_file
</code></pre>
<p>Will give you almost what you expect</p>
<p>-n : tells grep to print the line number</p>
<p>-2 : print 2 additional lines (and the wanted string, of course)</p>
| <p>Maybe using grep like this:</p> <pre><code>grep -n -2 your_searched_for_string your_large_text_file </code></pre> <p>Will give you almost what you expect</p> <p>-n : tells grep to print the line number</p> <p>-2 : print 2 additional lines (and the wanted string, of course)</p> | 58, 390 | linux, shell | <h1>Find line number in a text file - without opening the file</h1>
<p>In a very large file I need to find the position (line number) of a string, then extract the 2 lines above and below that string. </p>
<p>To do this right now - I launch vi, find the string, note it's line number, exit vi, then use sed to extract t... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,799 | bash | # Find line number in a text file - without opening the file
In a very large file I need to find the position (line number) of a string, then extract the 2 lines above and below that string.
To do this right now - I launch vi, find the string, note it's line number, exit vi, then use sed to extract the lines surround... | Maybe using grep like this:
```
grep -n -2 your_searched_for_string your_large_text_file
```
Will give you almost what you expect
-n : tells grep to print the line number
-2 : print 2 additional lines (and the wanted string, of course) |
12211560 | What is the difference between ">" and "&>" in bash? | 12 | 2012-08-31 08:28:03 | <p>In bash we have 3 stream types:</p>
<ul>
<li>0 (STDIN)</li>
<li>1 (STDOUT)</li>
<li>2 (STDERR)</li>
</ul>
<p>So, while executing some program i can use these streams (e.g. i can redirect them from console to a file or smth like /dev/null, etc):</p>
<pre><code># only errors from STDERR will be shown, STDOUT will be m... | 6,303 | 1,391,074 | 2021-02-27 08:02:56 | 12,211,600 | 16 | 2012-08-31 08:30:41 | 714,501 | 2012-08-31 08:30:41 | https://stackoverflow.com/q/12211560 | https://stackoverflow.com/a/12211600 | <blockquote>
<p>what is the difference between ">" and "&>" in bash?</p>
</blockquote>
<p>It's a bashism that redirects both <code>stdout</code> and <code>stderr</code>. It can also be achieved with the more portable:</p>
<pre><code>command > file 2>&1
</code></pre>
| <blockquote> <p>what is the difference between ">" and "&>" in bash?</p> </blockquote> <p>It's a bashism that redirects both <code>stdout</code> and <code>stderr</code>. It can also be achieved with the more portable:</p> <pre><code>command > file 2>&1 </code></pre> | 58, 387, 488 | bash, console, linux | <h1>What is the difference between ">" and "&>" in bash?</h1>
<p>In bash we have 3 stream types:</p>
<ul>
<li>0 (STDIN)</li>
<li>1 (STDOUT)</li>
<li>2 (STDERR)</li>
</ul>
<p>So, while executing some program i can use these streams (e.g. i can redirect them from console to a file or smth like /dev/null, etc):</p>
<pre><... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,800 | bash | # What is the difference between ">" and "&>" in bash?
In bash we have 3 stream types:
- 0 (STDIN)
- 1 (STDOUT)
- 2 (STDERR)
So, while executing some program i can use these streams (e.g. i can redirect them from console to a file or smth like /dev/null, etc):
```
# only errors from STDERR will be shown, STDOUT wil... | > what is the difference between ">" and "&>" in bash?
It's a bashism that redirects both `stdout` and `stderr`. It can also be achieved with the more portable:
```
command > file 2>&1
``` |
11905649 | Unicode support for Invoke-Sqlcmd in PowerShell | 12 | 2012-08-10 16:24:38 | <p>The PowerShell <a href="http://msdn.microsoft.com/en-us/library/hh245198">sqlps module</a> provides core support for SQL Server access from within PowerShell and its <a href="http://msdn.microsoft.com/en-us/library/cc281720">Invoke-Sqlcmd</a> cmdlet is its main workhorse for executing literal queries or SQL script f... | 15,494 | 115,690 | 2021-01-23 22:21:34 | 11,911,050 | 16 | 2012-08-11 01:10:24 | 135,965 | 2012-08-12 13:03:27 | https://stackoverflow.com/q/11905649 | https://stackoverflow.com/a/11911050 | <p><strong>Update</strong> I tested invoke-sqlcmd on another machine and it works, so maybe the rest of this doesn't apply...</p>
<p><strong>Update 2</strong> Only seems to have issue with -inputfile when executing via -Query parameter invoke-sqlcmd works fine.</p>
<p>From what I can tell this has something to do wit... | <p><strong>Update</strong> I tested invoke-sqlcmd on another machine and it works, so maybe the rest of this doesn't apply...</p> <p><strong>Update 2</strong> Only seems to have issue with -inputfile when executing via -Query parameter invoke-sqlcmd works fine.</p> <p>From what I can tell this has something to do wit... | 72, 279, 526, 7445 | powershell, sqlcmd, sql-server, unicode | <h1>Unicode support for Invoke-Sqlcmd in PowerShell</h1>
<p>The PowerShell <a href="http://msdn.microsoft.com/en-us/library/hh245198">sqlps module</a> provides core support for SQL Server access from within PowerShell and its <a href="http://msdn.microsoft.com/en-us/library/cc281720">Invoke-Sqlcmd</a> cmdlet is its mai... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,801 | bash | # Unicode support for Invoke-Sqlcmd in PowerShell
The PowerShell [sqlps module](http://msdn.microsoft.com/en-us/library/hh245198) provides core support for SQL Server access from within PowerShell and its [Invoke-Sqlcmd](http://msdn.microsoft.com/en-us/library/cc281720) cmdlet is its main workhorse for executing liter... | **Update** I tested invoke-sqlcmd on another machine and it works, so maybe the rest of this doesn't apply...
**Update 2** Only seems to have issue with -inputfile when executing via -Query parameter invoke-sqlcmd works fine.
From what I can tell this has something to do with ADO.NET DataTable when converting a strin... |
11364722 | run bash script without input | 12 | 2012-07-06 15:00:31 | <p>I have written a bash script which installs a number of packages, however for each consecutive package installation i am promoted with the following message:</p>
<pre><code>After this operation, 1,006 kB of additional disk space will be used.
Do you want to continue [Y/n]?
</code></pre>
<p>Is there a way of set... | 6,368 | 1,285,948 | 2012-07-06 16:26:18 | 11,364,864 | 16 | 2012-07-06 15:08:39 | 1,085,062 | 2012-07-06 15:08:39 | https://stackoverflow.com/q/11364722 | https://stackoverflow.com/a/11364864 | <p>Two methods come to mind. The first (and better option) is to use the options in your package manager. For example: </p>
<pre><code>apt-get install -y [YOUR_PACKAGE]
</code></pre>
<p>if you use <code>apt</code> (type <code>apt-get install --help</code> for more help there). </p>
<p>The second is more of a quick-'... | <p>Two methods come to mind. The first (and better option) is to use the options in your package manager. For example: </p> <pre><code>apt-get install -y [YOUR_PACKAGE] </code></pre> <p>if you use <code>apt</code> (type <code>apt-get install --help</code> for more help there). </p> <p>The second is more of a quick-'... | 34, 387, 390 | bash, shell, unix | <h1>run bash script without input</h1>
<p>I have written a bash script which installs a number of packages, however for each consecutive package installation i am promoted with the following message:</p>
<pre><code>After this operation, 1,006 kB of additional disk space will be used.
Do you want to continue [Y/n]?
... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,802 | bash | # run bash script without input
I have written a bash script which installs a number of packages, however for each consecutive package installation i am promoted with the following message:
```
After this operation, 1,006 kB of additional disk space will be used.
Do you want to continue [Y/n]?
```
Is there a way o... | Two methods come to mind. The first (and better option) is to use the options in your package manager. For example:
```
apt-get install -y [YOUR_PACKAGE]
```
if you use `apt` (type `apt-get install --help` for more help there).
The second is more of a quick-'n-dirty one...use a pipe after `yes`:
```
yes | apt-get i... |
9568611 | How does argparse (and the deprecated optparse) respond to 'tab' keypress after python program name, in bash? | 12 | 2012-03-05 14:47:41 | <p>I have tested <a href="http://furius.ca/optcomplete/"><code>optcomplete</code></a> working with the <code>optparse</code> module. Its example is a simple file so I could get that working. I also tested it using the <code>argparse</code> module as the prior one is deprecated. But I really do not understand how and by... | 3,130 | 860,421 | 2023-09-27 18:53:44 | 9,571,453 | 16 | 2012-03-05 17:52:58 | 916,657 | 2023-09-27 18:53:44 | https://stackoverflow.com/q/9568611 | https://stackoverflow.com/a/9571453 | <p>To understand what's happening here, let's check what that bash function actually does:</p>
<pre><code>COMPREPLY=( $( \
COMP_LINE=$COMP_LINE COMP_POINT=$COMP_POINT \
COMP_WORDS="${COMP_WORDS[*]}" COMP_CWORD=$COMP_CWORD \
OPTPARSE_AUTO_COMPLETE=1 $1 ) )
</code></pre>
<p>See the <code>$1</code>... | <p>To understand what's happening here, let's check what that bash function actually does:</p> <pre><code>COMPREPLY=( $( \ COMP_LINE=$COMP_LINE COMP_POINT=$COMP_POINT \ COMP_WORDS="${COMP_WORDS[*]}" COMP_CWORD=$COMP_CWORD \ OPTPARSE_AUTO_COMPLETE=1 $1 ) ) </code></pre> <p>See the <code>$1</code>... | 16, 387, 4682, 8780, 59189 | argparse, autocomplete, bash, python, shebang | <h1>How does argparse (and the deprecated optparse) respond to 'tab' keypress after python program name, in bash?</h1>
<p>I have tested <a href="http://furius.ca/optcomplete/"><code>optcomplete</code></a> working with the <code>optparse</code> module. Its example is a simple file so I could get that working. I also tes... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,803 | bash | # How does argparse (and the deprecated optparse) respond to 'tab' keypress after python program name, in bash?
I have tested [`optcomplete`](http://furius.ca/optcomplete/) working with the `optparse` module. Its example is a simple file so I could get that working. I also tested it using the `argparse` module as the ... | To understand what's happening here, let's check what that bash function actually does:
```
COMPREPLY=( $( \
COMP_LINE=$COMP_LINE COMP_POINT=$COMP_POINT \
COMP_WORDS="${COMP_WORDS[*]}" COMP_CWORD=$COMP_CWORD \
OPTPARSE_AUTO_COMPLETE=1 $1 ) )
```
See the `$1` at the end? That means that it actually calls... |
4418378 | Wrap all commands entered within a Bash-Shell with a Python script | 12 | 2010-12-11 19:00:20 | <p>What i'd like to have is a mechanism that all commands i enter on a Bash-Terminal are wrapped by a Python-script. The Python-script executes the entered command, but it adds some additional magic (for example setting "dynamic" environment variables).
Is that possible somehow? </p>
<p>I'm running Ubuntu and Debian ... | 4,719 | 319,905 | 2012-01-17 21:29:57 | 8,893,138 | 16 | 2012-01-17 10:36:15 | 319,905 | 2012-01-17 21:29:57 | https://stackoverflow.com/q/4418378 | https://stackoverflow.com/a/8893138 | <p>The perfect way to wrap every command that is typed into a Bash Shell is to change the variable <code>PROMPT_COMMAND</code> inside the .bashrc. For example, if I want to do some Python stuff before every command, liked asked in my question:</p>
<p>.bashrc:</p>
<pre><code># ...
PROMPT_COMMAND="python mycoolscript.p... | <p>The perfect way to wrap every command that is typed into a Bash Shell is to change the variable <code>PROMPT_COMMAND</code> inside the .bashrc. For example, if I want to do some Python stuff before every command, liked asked in my question:</p> <p>.bashrc:</p> <pre><code># ... PROMPT_COMMAND="python mycoolscript.p... | 16, 58, 387 | bash, linux, python | <h1>Wrap all commands entered within a Bash-Shell with a Python script</h1>
<p>What i'd like to have is a mechanism that all commands i enter on a Bash-Terminal are wrapped by a Python-script. The Python-script executes the entered command, but it adds some additional magic (for example setting "dynamic" environment va... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,804 | bash | # Wrap all commands entered within a Bash-Shell with a Python script
What i'd like to have is a mechanism that all commands i enter on a Bash-Terminal are wrapped by a Python-script. The Python-script executes the entered command, but it adds some additional magic (for example setting "dynamic" environment variables).... | The perfect way to wrap every command that is typed into a Bash Shell is to change the variable `PROMPT_COMMAND` inside the .bashrc. For example, if I want to do some Python stuff before every command, liked asked in my question:
.bashrc:
```
# ...
PROMPT_COMMAND="python mycoolscript.py; $PROMPT_COMMAND;"
export $PRO... |
7773738 | Execute an array of string describing shell command | 12 | 2011-10-14 21:25:13 | <p>I'm struggling to execute a set of command lines stored as strings in an array.
My code looks like this :</p>
<pre><code>arr=( "sudo apt-get update" "sudo apt-get install xxx" )
...
arr=( ${arr[@]} "ln -s /path1 /path2" )
etc...
# Then I loop on the array of command
for (( i = 0 ; i < ${#arr[@]} ; i++ ))
do
... | 24,168 | 808,724 | 2024-08-06 00:50:30 | 7,774,197 | 16 | 2011-10-14 22:22:21 | 836,407 | 2011-10-14 23:07:15 | https://stackoverflow.com/q/7773738 | https://stackoverflow.com/a/7774197 | <p>Use <code>${#arr[@]}</code> to get the number of items in the array (<code>${arr[@]}</code> gives the word count). Using either <code>eval</code> or back-ticks (<kbd>`</kbd>) to execute the command works:</p>
<pre><code>[ 15:20 jon@host ~ ]$ cat run_yum_test.sh
#!/bin/bash
declare -a arr=("sudo yum search zsh" "s... | <p>Use <code>${#arr[@]}</code> to get the number of items in the array (<code>${arr[@]}</code> gives the word count). Using either <code>eval</code> or back-ticks (<kbd>`</kbd>) to execute the command works:</p> <pre><code>[ 15:20 jon@host ~ ]$ cat run_yum_test.sh #!/bin/bash declare -a arr=("sudo yum search zsh" "s... | 387 | bash | <h1>Execute an array of string describing shell command</h1>
<p>I'm struggling to execute a set of command lines stored as strings in an array.
My code looks like this :</p>
<pre><code>arr=( "sudo apt-get update" "sudo apt-get install xxx" )
...
arr=( ${arr[@]} "ln -s /path1 /path2" )
etc...
# Then I loop on the arra... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,805 | bash | # Execute an array of string describing shell command
I'm struggling to execute a set of command lines stored as strings in an array.
My code looks like this :
```
arr=( "sudo apt-get update" "sudo apt-get install xxx" )
...
arr=( ${arr[@]} "ln -s /path1 /path2" )
etc...
# Then I loop on the array of command
for ((... | Use `${#arr[@]}` to get the number of items in the array (`${arr[@]}` gives the word count). Using either `eval` or back-ticks (`` ` ``) to execute the command works:
```
[ 15:20 jon@host ~ ]$ cat run_yum_test.sh
#!/bin/bash
declare -a arr=("sudo yum search zsh" "sudo yum list zsh")
for (( i = 0; i < ${#arr[@]} ; i+... |
6947925 | Add app to OSX "Login Items" during a Package Maker installer postflight script | 12 | 2011-08-04 20:11:15 | <p>I need a way to add an application to the Login Items from a postflight script which is run as part of my installer. It needs to work on 10.5+. Preferably, it would work in a bash script. My application already requires administrative rights.</p>
<p>The approach I found here: <a href="https://stackoverflow.com/q... | 12,088 | 67,268 | 2017-07-30 00:48:24 | 7,643,260 | 16 | 2011-10-04 04:19:49 | 67,268 | 2013-03-13 00:30:21 | https://stackoverflow.com/q/6947925 | https://stackoverflow.com/a/7643260 | <p>Here's the options I investigated and experimented with:</p>
<h2>Option 1: Use Login Items</h2>
<p>This is the method I used. It's very easy to do from a bash file by adding the following line to your postflight.</p>
<pre><code>defaults write /Library/Preferences/loginwindow AutoLaunchedApplicationDictionary -ar... | <p>Here's the options I investigated and experimented with:</p> <h2>Option 1: Use Login Items</h2> <p>This is the method I used. It's very easy to do from a bash file by adding the following line to your postflight.</p> <pre><code>defaults write /Library/Preferences/loginwindow AutoLaunchedApplicationDictionary -ar... | 369, 387, 19696 | bash, macos, packagemaker | <h1>Add app to OSX "Login Items" during a Package Maker installer postflight script</h1>
<p>I need a way to add an application to the Login Items from a postflight script which is run as part of my installer. It needs to work on 10.5+. Preferably, it would work in a bash script. My application already requires admin... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,806 | bash | # Add app to OSX "Login Items" during a Package Maker installer postflight script
I need a way to add an application to the Login Items from a postflight script which is run as part of my installer. It needs to work on 10.5+. Preferably, it would work in a bash script. My application already requires administrative ri... | Here's the options I investigated and experimented with:
## Option 1: Use Login Items
This is the method I used. It's very easy to do from a bash file by adding the following line to your postflight.
```
defaults write /Library/Preferences/loginwindow AutoLaunchedApplicationDictionary -array-add '{Path="/Application... |
6854118 | Bash 'for' loop syntax? | 12 | 2011-07-28 04:32:51 | <p>What is the syntax for a Bash <code>for</code> loop?</p>
<p>I have tried:</p>
<pre><code>for (($i=0;$i<10;$i ++))
do
echo $i
done
</code></pre>
<p>I get this error:</p>
<pre><code>line 1: ((: =0: syntax error: operand expected (error token is "=0")
</code></pre>
| 14,820 | null | 2016-02-13 18:52:23 | 6,854,122 | 16 | 2011-07-28 04:33:45 | 417,980 | 2013-08-28 21:08:01 | https://stackoverflow.com/q/6854118 | https://stackoverflow.com/a/6854122 | <p>Replace </p>
<pre><code>for (($i=0...
</code></pre>
<p>with </p>
<pre><code>for ((i=0;i<10;i++))
</code></pre>
| <p>Replace </p> <pre><code>for (($i=0... </code></pre> <p>with </p> <pre><code>for ((i=0;i<10;i++)) </code></pre> | 387, 390, 531 | bash, scripting, shell | <h1>Bash 'for' loop syntax?</h1>
<p>What is the syntax for a Bash <code>for</code> loop?</p>
<p>I have tried:</p>
<pre><code>for (($i=0;$i<10;$i ++))
do
echo $i
done
</code></pre>
<p>I get this error:</p>
<pre><code>line 1: ((: =0: syntax error: operand expected (error token is "=0")
</code></pre>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,807 | bash | # Bash 'for' loop syntax?
What is the syntax for a Bash `for` loop?
I have tried:
```
for (($i=0;$i<10;$i ++))
do
echo $i
done
```
I get this error:
```
line 1: ((: =0: syntax error: operand expected (error token is "=0")
``` | Replace
```
for (($i=0...
```
with
```
for ((i=0;i<10;i++))
``` |
6756360 | How do I get "previous executed command" in a bash script? | 12 | 2011-07-20 02:32:50 | <p>I use multiple bash sessions, and I want to keep track of history from all of them in one file (I don't care that it is multiplexed from multiple sessions, I can always put a session identifier in front of it.) I have tried doing </p>
<pre><code>shopt -s histappend
</code></pre>
<p>and also adding </p>
<pre><code... | 11,866 | 2,344,982 | 2011-07-20 02:36:54 | 6,756,392 | 16 | 2011-07-20 02:36:54 | 643,977 | 2011-07-20 02:36:54 | https://stackoverflow.com/q/6756360 | https://stackoverflow.com/a/6756392 | <p>Something like</p>
<pre><code>fc -ln -1
</code></pre>
<p>should work. That said, you're probably running into concurrent access issues (read: multiple shells overwriting each others' history) and you may not be able to do any better by hand.</p>
| <p>Something like</p> <pre><code>fc -ln -1 </code></pre> <p>should work. That said, you're probably running into concurrent access issues (read: multiple shells overwriting each others' history) and you may not be able to do any better by hand.</p> | 387 | bash | <h1>How do I get "previous executed command" in a bash script?</h1>
<p>I use multiple bash sessions, and I want to keep track of history from all of them in one file (I don't care that it is multiplexed from multiple sessions, I can always put a session identifier in front of it.) I have tried doing </p>
<pre><code>sh... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,808 | bash | # How do I get "previous executed command" in a bash script?
I use multiple bash sessions, and I want to keep track of history from all of them in one file (I don't care that it is multiplexed from multiple sessions, I can always put a session identifier in front of it.) I have tried doing
```
shopt -s histappend
```... | Something like
```
fc -ln -1
```
should work. That said, you're probably running into concurrent access issues (read: multiple shells overwriting each others' history) and you may not be able to do any better by hand. |
5590375 | Recursively unzip files and then delete original file, leaving unzipped files in place from shell | 12 | 2011-04-08 04:18:52 | <p>I've so far figured out how to use find to recursively unzip all the files:</p>
<pre><code>find . -depth -name `*.zip` -exec /usr/bin/unzip -n {} \;
</code></pre>
<p>But, I can't figure out how to remove the zip files one at a time after the extraction. Adding rm *.zip in an -a -exec ends up deleting most of the ... | 37,997 | 697,974 | 2016-03-31 23:03:29 | 5,590,522 | 16 | 2011-04-08 04:41:39 | 246,762 | 2015-05-20 01:36:09 | https://stackoverflow.com/q/5590375 | https://stackoverflow.com/a/5590522 | <p>have you tried:</p>
<pre><code>find . -depth -name '*.zip' -exec /usr/bin/unzip -n {} \; -exec rm {} \;
</code></pre>
<p>or </p>
<pre><code>find . -depth -name '*.zip' -exec /usr/bin/unzip -n {} \; -delete
</code></pre>
<p>or running a second find after the unzip one</p>
<pre><code>find . -depth -name '*.zip' -... | <p>have you tried:</p> <pre><code>find . -depth -name '*.zip' -exec /usr/bin/unzip -n {} \; -exec rm {} \; </code></pre> <p>or </p> <pre><code>find . -depth -name '*.zip' -exec /usr/bin/unzip -n {} \; -delete </code></pre> <p>or running a second find after the unzip one</p> <pre><code>find . -depth -name '*.zip' -... | 387, 5610, 7597 | bash, rm, unzip | <h1>Recursively unzip files and then delete original file, leaving unzipped files in place from shell</h1>
<p>I've so far figured out how to use find to recursively unzip all the files:</p>
<pre><code>find . -depth -name `*.zip` -exec /usr/bin/unzip -n {} \;
</code></pre>
<p>But, I can't figure out how to remove the... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,809 | bash | # Recursively unzip files and then delete original file, leaving unzipped files in place from shell
I've so far figured out how to use find to recursively unzip all the files:
```
find . -depth -name `*.zip` -exec /usr/bin/unzip -n {} \;
```
But, I can't figure out how to remove the zip files one at a time after the... | have you tried:
```
find . -depth -name '*.zip' -exec /usr/bin/unzip -n {} \; -exec rm {} \;
```
or
```
find . -depth -name '*.zip' -exec /usr/bin/unzip -n {} \; -delete
```
or running a second find after the unzip one
```
find . -depth -name '*.zip' -exec rm {} \;
``` |
4731344 | Display all service names matching a string pattern | 12 | 2011-01-19 02:57:34 | <p>I'm trying to display the name (just the name) of all of the installed services that contain the string "SQL". For example, I want to see</p>
<ul>
<li>SQLAgent$SQL2008_R2</li>
<li>SQLBrowser</li>
<li>SQLWriter</li>
</ul>
<p>So I try this:</p>
<pre><code>Get-WmiObject Win32_Service
</code></pre>
<p>This displays ... | 66,310 | 25,216 | 2015-02-25 19:09:01 | 4,731,390 | 16 | 2011-01-19 03:11:34 | 236,131 | 2011-01-19 06:27:19 | https://stackoverflow.com/q/4731344 | https://stackoverflow.com/a/4731390 | <p>The easiest way to achieve that is using <code>-Filter</code> Parameter</p>
<pre><code>Get-WMIObject Win32_Service -Filter "Name LIKE '%SQL%'" |
Select -ExpandProperty Name
</code></pre>
<p>In case, you want to go with your code only, here is the way you can modify it:</p>
<pre><code>Get-WmiObject Win32_Service ... | <p>The easiest way to achieve that is using <code>-Filter</code> Parameter</p> <pre><code>Get-WMIObject Win32_Service -Filter "Name LIKE '%SQL%'" | Select -ExpandProperty Name </code></pre> <p>In case, you want to go with your code only, here is the way you can modify it:</p> <pre><code>Get-WmiObject Win32_Service ... | 526, 2596 | powershell, windows-services | <h1>Display all service names matching a string pattern</h1>
<p>I'm trying to display the name (just the name) of all of the installed services that contain the string "SQL". For example, I want to see</p>
<ul>
<li>SQLAgent$SQL2008_R2</li>
<li>SQLBrowser</li>
<li>SQLWriter</li>
</ul>
<p>So I try this:</p>
<pre><code... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,810 | bash | # Display all service names matching a string pattern
I'm trying to display the name (just the name) of all of the installed services that contain the string "SQL". For example, I want to see
- SQLAgent$SQL2008_R2
- SQLBrowser
- SQLWriter
So I try this:
```
Get-WmiObject Win32_Service
```
This displays all of the ... | The easiest way to achieve that is using `-Filter` Parameter
```
Get-WMIObject Win32_Service -Filter "Name LIKE '%SQL%'" |
Select -ExpandProperty Name
```
In case, you want to go with your code only, here is the way you can modify it:
```
Get-WmiObject Win32_Service | Select-Object -ExpandProperty Name |
Select-St... |
70609175 | How to format date in bash to YYYY-DD-MMTHH:MM:SS.sss | 11 | 2022-01-06 15:06:18 | <p>can someone give me a point how to format data in bash with miliseconds? Thanks for help.</p>
<p>BR.</p>
<p>Petr</p>
| 18,100 | 403,675 | 2025-02-08 13:54:17 | 70,609,414 | 16 | 2022-01-06 15:23:20 | 403,675 | 2022-02-02 16:52:42 | https://stackoverflow.com/q/70609175 | https://stackoverflow.com/a/70609414 | <p>Solution is pretty simple. It is <code>date '+%Y-%m-%dT%T.%3N'</code>.</p>
| <p>Solution is pretty simple. It is <code>date '+%Y-%m-%dT%T.%3N'</code>.</p> | 58, 245, 387, 5002 | bash, date, format, linux | <h1>How to format date in bash to YYYY-DD-MMTHH:MM:SS.sss</h1>
<p>can someone give me a point how to format data in bash with miliseconds? Thanks for help.</p>
<p>BR.</p>
<p>Petr</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,811 | bash | # How to format date in bash to YYYY-DD-MMTHH:MM:SS.sss
can someone give me a point how to format data in bash with miliseconds? Thanks for help.
BR.
Petr | Solution is pretty simple. It is `date '+%Y-%m-%dT%T.%3N'`. |
61103034 | Avoid command line arguments propagation when sourcing bash script | 11 | 2020-04-08 14:22:59 | <p>I have a bash script <code>a.sh</code> that looks like this:</p>
<pre class="lang-sh prettyprint-override"><code>#!/bin/bash
echo $#
echo $1
</code></pre>
<p>and a script <code>b.sh</code> that looks like this:</p>
<pre class="lang-sh prettyprint-override"><code>#!/bin/bash
source ./a.sh
</code></pre>
<p>If I ca... | 3,838 | 1,028,138 | 2022-09-21 14:15:52 | 61,106,037 | 16 | 2020-04-08 17:00:50 | 89,817 | 2021-09-23 03:15:00 | https://stackoverflow.com/q/61103034 | https://stackoverflow.com/a/61106037 | <p>The root of the problem is an anomaly in how the <code>source</code> command works. From the <a href="https://linux.die.net/man/1/bash" rel="noreferrer">bash man page</a>, in the "Shell Builtin Commands" section:</p>
<blockquote>
<p>. <em>filename</em> [<em>arguments</em>]<br />
source <em>filename</em> [<... | <p>The root of the problem is an anomaly in how the <code>source</code> command works. From the <a href="https://linux.die.net/man/1/bash" rel="noreferrer">bash man page</a>, in the "Shell Builtin Commands" section:</p> <blockquote> <p>. <em>filename</em> [<em>arguments</em>]<br /> source <em>filename</em> [<... | 387 | bash | <h1>Avoid command line arguments propagation when sourcing bash script</h1>
<p>I have a bash script <code>a.sh</code> that looks like this:</p>
<pre class="lang-sh prettyprint-override"><code>#!/bin/bash
echo $#
echo $1
</code></pre>
<p>and a script <code>b.sh</code> that looks like this:</p>
<pre class="lang-sh pre... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,812 | bash | # Avoid command line arguments propagation when sourcing bash script
I have a bash script `a.sh` that looks like this:
```
#!/bin/bash
echo $#
echo $1
```
and a script `b.sh` that looks like this:
```
#!/bin/bash
source ./a.sh
```
If I call `./a.sh` I'm correctly getting 0 and an empty line as output. When calling... | The root of the problem is an anomaly in how the `source` command works. From the [bash man page](https://linux.die.net/man/1/bash), in the "Shell Builtin Commands" section:
> . *filename* [*arguments*]
> source *filename* [*arguments*]
> [...] If any *arguments* are supplied, they become the positional parameters... |
53380988 | How to execute Shell Script from Flask App | 11 | 2018-11-19 18:57:17 | <p>I've created and deployed a Flask App with Apache2 server WSGI in which now would like to run a .sh script from the App. However, from calling from python code, it doesn't execute. </p>
<p>Here is the test.sh:</p>
<pre><code>#!/bin/bash
echo "hi from shell script"
</code></pre>
<p>Here is my python flask app cod... | 31,627 | 3,866,549 | 2020-09-19 03:12:39 | 53,381,744 | 16 | 2018-11-19 19:55:20 | 3,129,414 | 2020-09-19 03:12:39 | https://stackoverflow.com/q/53380988 | https://stackoverflow.com/a/53381744 | <p>To show command output inside Python, there are two popular methods:</p>
<ol>
<li><code>check_output()</code>: It runs command with arguments and return its output. <a href="https://docs.python.org/3/library/subprocess.html#subprocess.check_output" rel="noreferrer">(official documentation)</a></li>
<li><code>subproc... | <p>To show command output inside Python, there are two popular methods:</p> <ol> <li><code>check_output()</code>: It runs command with arguments and return its output. <a href="https://docs.python.org/3/library/subprocess.html#subprocess.check_output" rel="noreferrer">(official documentation)</a></li> <li><code>subproc... | 16, 387, 390, 54712 | bash, flask, python, shell | <h1>How to execute Shell Script from Flask App</h1>
<p>I've created and deployed a Flask App with Apache2 server WSGI in which now would like to run a .sh script from the App. However, from calling from python code, it doesn't execute. </p>
<p>Here is the test.sh:</p>
<pre><code>#!/bin/bash
echo "hi from shell scrip... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,813 | bash | # How to execute Shell Script from Flask App
I've created and deployed a Flask App with Apache2 server WSGI in which now would like to run a .sh script from the App. However, from calling from python code, it doesn't execute.
Here is the test.sh:
```
#!/bin/bash
echo "hi from shell script"
```
Here is my python fla... | To show command output inside Python, there are two popular methods:
1. `check_output()`: It runs command with arguments and return its output. [(official documentation)](https://docs.python.org/3/library/subprocess.html#subprocess.check_output)
2. `subprocess.communicate()`: Interact with process: Send data to stdin.... |
51178003 | Run bash script with Django | 11 | 2018-07-04 16:40:15 | <p>I'm really new in django. I need to run a bash script when I push a button in html, and I need to do it with Django Framework, because I used it to build my web. I'd be grateful if anybody could help me </p>
<p>Edit: I have added my template and my views for being more helpful. In the 'nuevaCancion' template, I use... | 16,664 | 9,499,537 | 2024-06-10 05:19:05 | 51,178,308 | 16 | 2018-07-04 17:04:16 | 7,003,620 | 2019-07-09 06:04:24 | https://stackoverflow.com/q/51178003 | https://stackoverflow.com/a/51178308 | <p>You can do this with empty <code>form</code>.</p>
<p>In your template make a empty <code>form</code></p>
<pre><code># index.html
<form action="{% url 'run_sh' %}" method="POST">
{% csrf_token %}
<button type="submit">Call</button>
</form>
</code></pre>
<p>Add <code>url</code> for y... | <p>You can do this with empty <code>form</code>.</p> <p>In your template make a empty <code>form</code></p> <pre><code># index.html <form action="{% url 'run_sh' %}" method="POST"> {% csrf_token %} <button type="submit">Call</button> </form> </code></pre> <p>Add <code>url</code> for y... | 2, 16, 243, 387, 390 | bash, django, html, python, shell | <h1>Run bash script with Django</h1>
<p>I'm really new in django. I need to run a bash script when I push a button in html, and I need to do it with Django Framework, because I used it to build my web. I'd be grateful if anybody could help me </p>
<p>Edit: I have added my template and my views for being more helpful. ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,814 | bash | # Run bash script with Django
I'm really new in django. I need to run a bash script when I push a button in html, and I need to do it with Django Framework, because I used it to build my web. I'd be grateful if anybody could help me
Edit: I have added my template and my views for being more helpful. In the 'nuevaCanc... | You can do this with empty `form`.
In your template make a empty `form`
```
# index.html
<form action="{% url 'run_sh' %}" method="POST">
{% csrf_token %}
<button type="submit">Call</button>
</form>
```
Add `url` for your `form`
```
from django.conf.urls import url
from . import views
urlpatterns = [
... |
48424152 | Compare System.Version in Powershell | 11 | 2018-01-24 13:52:24 | <p>I have a case where I have to make a decision in script based on comparing versions
Consider this example: </p>
<pre><code>PS C:\>
[version]$SomeVersion='1.1.1'
[version]$OtherVersion='1.1.1.0'
PS C:\> $SomeVersion
Major Minor Build Revision
----- ----- ----- --------
1 1 1 -1
P... | 31,193 | 5,917,637 | 2019-06-19 18:42:56 | 48,424,304 | 16 | 2018-01-24 14:00:48 | 696,808 | 2019-06-19 18:42:56 | https://stackoverflow.com/q/48424152 | https://stackoverflow.com/a/48424304 | <p>Use the <a href="https://learn.microsoft.com/en-us/dotnet/api/system.version.-ctor?view=netframework-4.0" rel="noreferrer">three argument <code>System.Version</code> constructor</a> to make new instances with the relevant properties:</p>
<pre><code>[Version]::new($scriptversion.Major,$scriptversion.Minor,$scriptver... | <p>Use the <a href="https://learn.microsoft.com/en-us/dotnet/api/system.version.-ctor?view=netframework-4.0" rel="noreferrer">three argument <code>System.Version</code> constructor</a> to make new instances with the relevant properties:</p> <pre><code>[Version]::new($scriptversion.Major,$scriptversion.Minor,$scriptver... | 526 | powershell | <h1>Compare System.Version in Powershell</h1>
<p>I have a case where I have to make a decision in script based on comparing versions
Consider this example: </p>
<pre><code>PS C:\>
[version]$SomeVersion='1.1.1'
[version]$OtherVersion='1.1.1.0'
PS C:\> $SomeVersion
Major Minor Build Revision
----- ----- --... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,815 | bash | # Compare System.Version in Powershell
I have a case where I have to make a decision in script based on comparing versions
Consider this example:
```
PS C:\>
[version]$SomeVersion='1.1.1'
[version]$OtherVersion='1.1.1.0'
PS C:\> $SomeVersion
Major Minor Build Revision
----- ----- ----- --------
1 1 ... | Use the [three argument `System.Version` constructor](https://learn.microsoft.com/en-us/dotnet/api/system.version.-ctor?view=netframework-4.0) to make new instances with the relevant properties:
```
[Version]::new($scriptversion.Major,$scriptversion.Minor,$scriptversion.Build) -gt [Version]::new($currentVersion.Major,... |
47891523 | How do I git grep for a string including a ">"? | 11 | 2017-12-19 16:45:53 | <p><code>git grep</code> seems to have simpler rules than regular GNU <code>grep</code>, which will allow you to <a href="https://stackoverflow.com/q/4262150/209139">search for tabs</a> and to <a href="https://stackoverflow.com/q/11234858/209139">escape special characters with a backslash</a>. I am trying to find occur... | 6,438 | 209,139 | 2022-11-01 15:17:51 | 47,891,554 | 16 | 2017-12-19 16:47:32 | 14,122 | 2017-12-19 16:57:53 | https://stackoverflow.com/q/47891523 | https://stackoverflow.com/a/47891554 | <p>When doubt, use a single-character class rather than a backslash to make a single character literal inside a regex:</p>
<pre><code>git grep -e '-[>]upload'
</code></pre>
<p>Whereas the meaning of a backslash can be different depending on the specific character and the specific regex syntax in use, <code>[>]<... | <p>When doubt, use a single-character class rather than a backslash to make a single character literal inside a regex:</p> <pre><code>git grep -e '-[>]upload' </code></pre> <p>Whereas the meaning of a backslash can be different depending on the specific character and the specific regex syntax in use, <code>[>]<... | 119, 387 | bash, git | <h1>How do I git grep for a string including a ">"?</h1>
<p><code>git grep</code> seems to have simpler rules than regular GNU <code>grep</code>, which will allow you to <a href="https://stackoverflow.com/q/4262150/209139">search for tabs</a> and to <a href="https://stackoverflow.com/q/11234858/209139">escape special c... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,816 | bash | # How do I git grep for a string including a ">"?
`git grep` seems to have simpler rules than regular GNU `grep`, which will allow you to [search for tabs](https://stackoverflow.com/q/4262150/209139) and to [escape special characters with a backslash](https://stackoverflow.com/q/11234858/209139). I am trying to find o... | When doubt, use a single-character class rather than a backslash to make a single character literal inside a regex:
```
git grep -e '-[>]upload'
```
Whereas the meaning of a backslash can be different depending on the specific character and the specific regex syntax in use, `[>]` means the same thing consistently.
*... |
47661909 | Need a string with a $ in powershell inside ' ' | 11 | 2017-12-05 20:13:16 | <p>I am trying to write a PS script to find a share named C$$ but PS is interpreting the $ sign and I want to pass it into the filter.
Normally \ stops this but after googling I cant get a working solution. </p>
<pre><code>$string = "Name='C\$\$'"
Write-Host $string
get-wmiobject -Class Win32_share -filter $string
</c... | 18,902 | 7,837,492 | 2017-12-05 20:56:10 | 47,661,943 | 16 | 2017-12-05 20:16:02 | 7,869,690 | 2017-12-05 20:16:02 | https://stackoverflow.com/q/47661909 | https://stackoverflow.com/a/47661943 | <p>You can use the backtick to escape characters in a string.</p>
<pre><code>$string = "Name='C`$`$'"
</code></pre>
<p>That should return <code>Name='C$$'</code></p>
| <p>You can use the backtick to escape characters in a string.</p> <pre><code>$string = "Name='C`$`$'" </code></pre> <p>That should return <code>Name='C$$'</code></p> | 526, 24067 | powershell, powershell-2.0 | <h1>Need a string with a $ in powershell inside ' '</h1>
<p>I am trying to write a PS script to find a share named C$$ but PS is interpreting the $ sign and I want to pass it into the filter.
Normally \ stops this but after googling I cant get a working solution. </p>
<pre><code>$string = "Name='C\$\$'"
Write-Host $st... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,817 | bash | # Need a string with a $ in powershell inside ' '
I am trying to write a PS script to find a share named C$$ but PS is interpreting the $ sign and I want to pass it into the filter.
Normally \ stops this but after googling I cant get a working solution.
```
$string = "Name='C\$\$'"
Write-Host $string
get-wmiobject -C... | You can use the backtick to escape characters in a string.
```
$string = "Name='C`$`$'"
```
That should return `Name='C$$'` |
46034256 | Bash: How to check if a zip file contain a specified path/file.ext? | 11 | 2017-09-04 09:37:57 | <p>I've to handle 46 .zip file according to their internal structure.</p>
<p>The first usefull check to branch the elaboration is check if a specific file is presente in the .zip. </p>
<p>Actually i'm unzipping and testing the existence of unzipped file. </p>
<p><strong>But, I ask you, is there a way to check if a f... | 17,942 | 1,055,279 | 2020-05-06 12:51:31 | 46,034,900 | 16 | 2017-09-04 10:15:44 | 8,536,377 | 2017-09-04 10:53:24 | https://stackoverflow.com/q/46034256 | https://stackoverflow.com/a/46034900 | <p>To check for specific file, you can combine <code>unzip -l</code> with <code>grep</code> to search for that file. The command will look something like this</p>
<pre><code>unzip -l archive.zip | grep -q name_of_file && echo $?
</code></pre>
<p>What this does is it lists all files in <code>archive.zip</code>... | <p>To check for specific file, you can combine <code>unzip -l</code> with <code>grep</code> to search for that file. The command will look something like this</p> <pre><code>unzip -l archive.zip | grep -q name_of_file && echo $? </code></pre> <p>What this does is it lists all files in <code>archive.zip</code>... | 387, 7597 | bash, unzip | <h1>Bash: How to check if a zip file contain a specified path/file.ext?</h1>
<p>I've to handle 46 .zip file according to their internal structure.</p>
<p>The first usefull check to branch the elaboration is check if a specific file is presente in the .zip. </p>
<p>Actually i'm unzipping and testing the existence of u... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,818 | bash | # Bash: How to check if a zip file contain a specified path/file.ext?
I've to handle 46 .zip file according to their internal structure.
The first usefull check to branch the elaboration is check if a specific file is presente in the .zip.
Actually i'm unzipping and testing the existence of unzipped file.
**But, I ... | To check for specific file, you can combine `unzip -l` with `grep` to search for that file. The command will look something like this
```
unzip -l archive.zip | grep -q name_of_file && echo $?
```
What this does is it lists all files in `archive.zip`, pipes them to `grep` which searches for `name_of_file`. `grep` exi... |
45895071 | How to use substitution in xargs? | 11 | 2017-08-26 11:55:33 | <p>What I want to do is </p>
<ol>
<li>find all file with <code>.txt</code> extension</li>
<li>cp them to <code>.dat</code> file</li>
</ol>
<p>it could do like this:</p>
<pre><code>for f in `find . -type f -name "*.txt"`; do cp $f ${f%.txt}.dat; done
</code></pre>
<p>I want to do this with xargs, I have tried this:<... | 12,118 | 2,849,157 | 2022-02-16 15:24:00 | 45,895,212 | 16 | 2017-08-26 12:11:54 | 963,881 | 2022-02-16 15:24:00 | https://stackoverflow.com/q/45895071 | https://stackoverflow.com/a/45895212 | <blockquote>
<ol>
<li>How to do the substitution rightly?</li>
</ol>
</blockquote>
<p>You cannot use substitution in the way you are trying to do because <code>{}</code> is not a bash variable (only part of xargs syntax), therefore bash cannot do substitution on it.</p>
<p>A better way to it would be to create a full b... | <blockquote> <ol> <li>How to do the substitution rightly?</li> </ol> </blockquote> <p>You cannot use substitution in the way you are trying to do because <code>{}</code> is not a bash variable (only part of xargs syntax), therefore bash cannot do substitution on it.</p> <p>A better way to it would be to create a full b... | 390, 10326 | shell, xargs | <h1>How to use substitution in xargs?</h1>
<p>What I want to do is </p>
<ol>
<li>find all file with <code>.txt</code> extension</li>
<li>cp them to <code>.dat</code> file</li>
</ol>
<p>it could do like this:</p>
<pre><code>for f in `find . -type f -name "*.txt"`; do cp $f ${f%.txt}.dat; done
</code></pre>
<p>I want... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,819 | bash | # How to use substitution in xargs?
What I want to do is
1. find all file with `.txt` extension
2. cp them to `.dat` file
it could do like this:
```
for f in `find . -type f -name "*.txt"`; do cp $f ${f%.txt}.dat; done
```
I want to do this with xargs, I have tried this:
```
find . -type f -name "*.txt" | xargs -... | > 1. How to do the substitution rightly?
You cannot use substitution in the way you are trying to do because `{}` is not a bash variable (only part of xargs syntax), therefore bash cannot do substitution on it.
A better way to it would be to create a full bash command and provide it as and argument to xargs (e.g. `xa... |
43022687 | Python subprocess argument with equal sign and space | 11 | 2017-03-25 22:28:44 | <p>I am trying to run a command with <code>subprocess.check_output</code> without using <code>shell=True</code> keyword argument. My command is this:</p>
<pre><code>command --parameter="something with spaces"
</code></pre>
<p>With this:</p>
<pre><code>subprocess.check_output(['command', '--parameter="something with ... | 6,785 | 4,273,690 | 2020-02-12 18:28:15 | 43,022,755 | 16 | 2017-03-25 22:37:21 | 2,203,038 | 2017-03-25 22:37:21 | https://stackoverflow.com/q/43022687 | https://stackoverflow.com/a/43022755 | <p>Here's what you need to know:</p>
<p>Spaces are used for separating arguments on the shell command line. However, if you are not using shell, you don't need to escape spaces. Spaces can be escaped at least two ways ( that I know of ): With quotes ( either single or double ) and the backslash . </p>
<p>When yo... | <p>Here's what you need to know:</p> <p>Spaces are used for separating arguments on the shell command line. However, if you are not using shell, you don't need to escape spaces. Spaces can be escaped at least two ways ( that I know of ): With quotes ( either single or double ) and the backslash . </p> <p>When yo... | 16, 390, 2348 | python, shell, subprocess | <h1>Python subprocess argument with equal sign and space</h1>
<p>I am trying to run a command with <code>subprocess.check_output</code> without using <code>shell=True</code> keyword argument. My command is this:</p>
<pre><code>command --parameter="something with spaces"
</code></pre>
<p>With this:</p>
<pre><code>sub... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,820 | bash | # Python subprocess argument with equal sign and space
I am trying to run a command with `subprocess.check_output` without using `shell=True` keyword argument. My command is this:
```
command --parameter="something with spaces"
```
With this:
```
subprocess.check_output(['command', '--parameter="something with spac... | Here's what you need to know:
Spaces are used for separating arguments on the shell command line. However, if you are not using shell, you don't need to escape spaces. Spaces can be escaped at least two ways ( that I know of ): With quotes ( either single or double ) and the backslash .
When you pass an array to subp... |
41966140 | How can I make an array of lists (or similar) in bash? | 11 | 2017-01-31 19:40:37 | <p>I want to iterate over a few lists in bash. Right now I have</p>
<pre><code>array=("list1item1 list1item2" "list2item list2item2")
for list in "${array[@]}"
do
for item in $list
do
echo $item
done
done
</code></pre>
<p>This doesn't work. Is there any way to make a list of lists, array of array... | 20,026 | 4,208,228 | 2018-12-27 13:16:14 | 41,966,239 | 16 | 2017-01-31 19:46:16 | 1,566,221 | 2017-01-31 19:52:16 | https://stackoverflow.com/q/41966140 | https://stackoverflow.com/a/41966239 | <p>Once I added the missing <code>do</code> and <code>done</code> into your code:</p>
<pre><code>array=("list1item1 list1item2" "list2item list2item2")
for list in "${array[@]}"
do
for item in $list
do
echo $item
done
done
</code></pre>
<p>it produced the expected output:</p>
<pre><code>list1ite... | <p>Once I added the missing <code>do</code> and <code>done</code> into your code:</p> <pre><code>array=("list1item1 list1item2" "list2item list2item2") for list in "${array[@]}" do for item in $list do echo $item done done </code></pre> <p>it produced the expected output:</p> <pre><code>list1ite... | 114, 387, 2314, 5608 | arrays, bash, list, loops | <h1>How can I make an array of lists (or similar) in bash?</h1>
<p>I want to iterate over a few lists in bash. Right now I have</p>
<pre><code>array=("list1item1 list1item2" "list2item list2item2")
for list in "${array[@]}"
do
for item in $list
do
echo $item
done
done
</code></pre>
<p>This doesn'... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,821 | bash | # How can I make an array of lists (or similar) in bash?
I want to iterate over a few lists in bash. Right now I have
```
array=("list1item1 list1item2" "list2item list2item2")
for list in "${array[@]}"
do
for item in $list
do
echo $item
done
done
```
This doesn't work. Is there any way to make ... | Once I added the missing `do` and `done` into your code:
```
array=("list1item1 list1item2" "list2item list2item2")
for list in "${array[@]}"
do
for item in $list
do
echo $item
done
done
```
it produced the expected output:
```
list1item1
list1item2
list2item
list2item2
```
It's not clear to me... |
41014742 | Where will be nohup file created/stored | 11 | 2016-12-07 10:16:12 | <p>On executing below given command within a script file:</p>
<p>Command : </p>
<pre><code>nohup /usr/hp/ism/jboss-3.2.8.SP1/bin/run.sh &
</code></pre>
<p>Where will the nohup.out file be created, assuming that script is running in root directory ?</p>
| 36,425 | 3,817,656 | 2020-01-03 16:07:39 | 41,014,970 | 16 | 2016-12-07 10:26:43 | 6,518,219 | 2016-12-07 10:32:52 | https://stackoverflow.com/q/41014742 | https://stackoverflow.com/a/41014970 | <p>Could you check home directory. </p>
<p>also you can redirect as below;</p>
<pre><code>nohup /usr/hp/ism/jboss-3.2.8.SP1/bin/run.sh &> /tmp/nohup.out
</code></pre>
<blockquote>
<p>man nohup ; </p>
<p>If standard input is a terminal, redirect it from /dev/null. If
standard output is a terminal, ap... | <p>Could you check home directory. </p> <p>also you can redirect as below;</p> <pre><code>nohup /usr/hp/ism/jboss-3.2.8.SP1/bin/run.sh &> /tmp/nohup.out </code></pre> <blockquote> <p>man nohup ; </p> <p>If standard input is a terminal, redirect it from /dev/null. If standard output is a terminal, ap... | 58, 390 | linux, shell | <h1>Where will be nohup file created/stored</h1>
<p>On executing below given command within a script file:</p>
<p>Command : </p>
<pre><code>nohup /usr/hp/ism/jboss-3.2.8.SP1/bin/run.sh &
</code></pre>
<p>Where will the nohup.out file be created, assuming that script is running in root directory ?</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,822 | bash | # Where will be nohup file created/stored
On executing below given command within a script file:
Command :
```
nohup /usr/hp/ism/jboss-3.2.8.SP1/bin/run.sh &
```
Where will the nohup.out file be created, assuming that script is running in root directory ? | Could you check home directory.
also you can redirect as below;
```
nohup /usr/hp/ism/jboss-3.2.8.SP1/bin/run.sh &> /tmp/nohup.out
```
> man nohup ;
>
> If standard input is a terminal, redirect it from /dev/null. If
> standard output is a terminal, append output to 'nohup.out' if
> possible, '$HOME/nohup.out' other... |
40968061 | Bad : modifier in $ (/) | 11 | 2016-12-05 06:07:42 | <pre><code>export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/my/lib
</code></pre>
<p>error:</p>
<pre><code>Bad : modifier in $ (/)
</code></pre>
<p>echo $SHELL</p>
<pre><code>/bin/tcsh
</code></pre>
<p>I want to add my library to LD_LIBRARY_PATH variable. But Gives the above error.</p>
| 35,344 | 7,172,075 | 2016-12-05 09:24:41 | 40,968,165 | 16 | 2016-12-05 06:15:28 | 5,291,015 | 2016-12-05 09:24:41 | https://stackoverflow.com/q/40968061 | https://stackoverflow.com/a/40968165 | <p>As <a href="https://stackoverflow.com/users/20862/ignacio-vazquez-abrams">Ignacio Vazquez-Abrams</a>, pointed out you need to <a href="http://www.tcsh.org/EnvironmentVariable" rel="noreferrer">set environment variable</a> in <code>tcsh</code> syntax as</p>
<pre><code>setenv LD_LIBRARY_PATH ${LD_LIBRARY_PATH}:"/home... | <p>As <a href="https://stackoverflow.com/users/20862/ignacio-vazquez-abrams">Ignacio Vazquez-Abrams</a>, pointed out you need to <a href="http://www.tcsh.org/EnvironmentVariable" rel="noreferrer">set environment variable</a> in <code>tcsh</code> syntax as</p> <pre><code>setenv LD_LIBRARY_PATH ${LD_LIBRARY_PATH}:"/home... | 390, 8599 | shell, tcsh | <h1>Bad : modifier in $ (/)</h1>
<pre><code>export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/my/lib
</code></pre>
<p>error:</p>
<pre><code>Bad : modifier in $ (/)
</code></pre>
<p>echo $SHELL</p>
<pre><code>/bin/tcsh
</code></pre>
<p>I want to add my library to LD_LIBRARY_PATH variable. But Gives the above error.</p>... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,823 | bash | # Bad : modifier in $ (/)
```
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/my/lib
```
error:
```
Bad : modifier in $ (/)
```
echo $SHELL
```
/bin/tcsh
```
I want to add my library to LD_LIBRARY_PATH variable. But Gives the above error. | As [Ignacio Vazquez-Abrams](https://stackoverflow.com/users/20862/ignacio-vazquez-abrams), pointed out you need to [set environment variable](http://www.tcsh.org/EnvironmentVariable) in `tcsh` syntax as
```
setenv LD_LIBRARY_PATH ${LD_LIBRARY_PATH}:"/home/my/lib"
``` |
37258673 | Bash: loop through files that DO NOT match extension | 11 | 2016-05-16 16:24:34 | <p>I'm writing a bash script that needs to loop files inside a directory that do not match a specific extension. So far, I've found that the following code loops all files that matches the given extension:</p>
<pre><code>for f in *.txt ; do
echo $f;
done
</code></pre>
<p>How could insthead loop through files that... | 7,839 | 2,746,388 | 2016-05-17 07:40:30 | 37,258,868 | 16 | 2016-05-16 16:35:51 | 1,126,841 | 2016-05-16 16:41:02 | https://stackoverflow.com/q/37258673 | https://stackoverflow.com/a/37258868 | <p>You can pattern-match with the <code>==</code> operator.</p>
<pre><code>for f in *; do
[[ $f == *.txt ]] && continue
# [[ $f != *.txt ]] || continue
...
done
</code></pre>
<p>If this might run in an empty directory, either use <code>shopt -s nullglob</code> prior to the loop, or put <code>[ -e ... | <p>You can pattern-match with the <code>==</code> operator.</p> <pre><code>for f in *; do [[ $f == *.txt ]] && continue # [[ $f != *.txt ]] || continue ... done </code></pre> <p>If this might run in an empty directory, either use <code>shopt -s nullglob</code> prior to the loop, or put <code>[ -e ... | 18, 387, 2314, 5310 | bash, file, loops, regex | <h1>Bash: loop through files that DO NOT match extension</h1>
<p>I'm writing a bash script that needs to loop files inside a directory that do not match a specific extension. So far, I've found that the following code loops all files that matches the given extension:</p>
<pre><code>for f in *.txt ; do
echo $f;
don... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,824 | bash | # Bash: loop through files that DO NOT match extension
I'm writing a bash script that needs to loop files inside a directory that do not match a specific extension. So far, I've found that the following code loops all files that matches the given extension:
```
for f in *.txt ; do
echo $f;
done
```
How could ins... | You can pattern-match with the `==` operator.
```
for f in *; do
[[ $f == *.txt ]] && continue
# [[ $f != *.txt ]] || continue
...
done
```
If this might run in an empty directory, either use `shopt -s nullglob` prior to the loop, or put `[ -e "$f" ] || continue` in side the loop. (The former is preferabl... |
35217413 | In bash, should I unset a local variable inside a function? | 11 | 2016-02-05 06:12:05 | <p>Should I unset my local variables at the end of a function in a bash script?
As an example, the following function:</p>
<pre><code>square()
{
local var=$1
(( var = var * var ))
echo $var
## should I unset $var here??
}
</code></pre>
<p>Just curious about best practices, thanks!</p>
| 5,406 | 5,813,245 | 2016-02-05 13:37:18 | 35,225,591 | 16 | 2016-02-05 13:37:18 | 1,126,841 | 2016-02-05 13:37:18 | https://stackoverflow.com/q/35217413 | https://stackoverflow.com/a/35225591 | <p>If you weren't using the <code>local</code> command, then you would want to unset the variable before leaving the function to avoid polluting the global namespace.</p>
<pre><code>square () {
var=$1 # var is global, and could be used after square returns
(( var = var * var ))
echo $var
unset var ... | <p>If you weren't using the <code>local</code> command, then you would want to unset the variable before leaving the function to avoid polluting the global namespace.</p> <pre><code>square () { var=$1 # var is global, and could be used after square returns (( var = var * var )) echo $var unset var ... | 34, 58, 387 | bash, linux, unix | <h1>In bash, should I unset a local variable inside a function?</h1>
<p>Should I unset my local variables at the end of a function in a bash script?
As an example, the following function:</p>
<pre><code>square()
{
local var=$1
(( var = var * var ))
echo $var
## should I unset $var here??
}
</code></pre>
<p>J... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,825 | bash | # In bash, should I unset a local variable inside a function?
Should I unset my local variables at the end of a function in a bash script?
As an example, the following function:
```
square()
{
local var=$1
(( var = var * var ))
echo $var
## should I unset $var here??
}
```
Just curious about best practices, ... | If you weren't using the `local` command, then you would want to unset the variable before leaving the function to avoid polluting the global namespace.
```
square () {
var=$1 # var is global, and could be used after square returns
(( var = var * var ))
echo $var
unset var # Remove it from the glob... |
33570391 | How to see all Request URLs the server is doing (final URLs) | 11 | 2015-11-06 15:40:50 | <p>How list from the command line URLs requests that are made from the server (an *ux machine) to another machine.</p>
<p>For instance, I am on the command line of server <strong>ALPHA_RE</strong> .
I do a ping to google.co.uk and another ping to bbc.co.uk
I would like to see, from the prompt :</p>
<p>google.co.uk
bb... | 27,954 | 278,739 | 2015-11-15 19:19:34 | 33,615,540 | 16 | 2015-11-09 18:16:26 | 5,462,012 | 2015-11-15 19:19:34 | https://stackoverflow.com/q/33570391 | https://stackoverflow.com/a/33615540 | <p>You can use <em>tcpdump</em> and <em>grep</em> to get info about activity about network traffic from the host, the following cmd line should get you all lines containing Host:</p>
<pre><code> tcpdump -i any -A -vv -s 0 | grep -e "Host:"
</code></pre>
<p>If I run the above in one shell and start a Links session to... | <p>You can use <em>tcpdump</em> and <em>grep</em> to get info about activity about network traffic from the host, the following cmd line should get you all lines containing Host:</p> <pre><code> tcpdump -i any -A -vv -s 0 | grep -e "Host:" </code></pre> <p>If I run the above in one shell and start a Links session to... | 58, 387, 1231, 5210, 12611 | bash, command-line, http, linux, tcpdump | <h1>How to see all Request URLs the server is doing (final URLs)</h1>
<p>How list from the command line URLs requests that are made from the server (an *ux machine) to another machine.</p>
<p>For instance, I am on the command line of server <strong>ALPHA_RE</strong> .
I do a ping to google.co.uk and another ping to bb... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,826 | bash | # How to see all Request URLs the server is doing (final URLs)
How list from the command line URLs requests that are made from the server (an *ux machine) to another machine.
For instance, I am on the command line of server **ALPHA_RE** .
I do a ping to google.co.uk and another ping to bbc.co.uk
I would like to see, ... | You can use *tcpdump* and *grep* to get info about activity about network traffic from the host, the following cmd line should get you all lines containing Host:
```
tcpdump -i any -A -vv -s 0 | grep -e "Host:"
```
If I run the above in one shell and start a Links session to stackoverflow I see:
```
Host: www.stac... |
33021473 | PowerShell to extract specific column from csv and store in a variable | 11 | 2015-10-08 16:41:09 | <p>My keys.csv file looks like this</p>
<pre><code> PrjKey BldKey key
LS LOOKUPSNAP1 LS-LOOKUPSNAP1
LS LSUH3 LS-LSUH3
LSPERF LPMDS0 LSPERF-LPMDS0
LSPERF LSP0 LSPERF-LSP0
</code></pre>
<p>I want to extract the values column "key" and store in a variable. I tried this</p>
<pre><code>... | 115,959 | 4,438,637 | 2017-09-14 16:58:03 | 33,022,326 | 16 | 2015-10-08 17:27:30 | 3,829,407 | 2017-09-14 16:58:03 | https://stackoverflow.com/q/33021473 | https://stackoverflow.com/a/33022326 | <p>You had the right idea of using <code>Select-Object</code> to get the one property you want. The two issues you had was that <code>Select-Object key</code> returns and object array with a key property when it looks like you just want string array of keys. Also <strong>never</strong> use <code>Format-cmdlets</code> w... | <p>You had the right idea of using <code>Select-Object</code> to get the one property you want. The two issues you had was that <code>Select-Object key</code> returns and object array with a key property when it looks like you just want string array of keys. Also <strong>never</strong> use <code>Format-cmdlets</code> w... | 526 | powershell | <h1>PowerShell to extract specific column from csv and store in a variable</h1>
<p>My keys.csv file looks like this</p>
<pre><code> PrjKey BldKey key
LS LOOKUPSNAP1 LS-LOOKUPSNAP1
LS LSUH3 LS-LSUH3
LSPERF LPMDS0 LSPERF-LPMDS0
LSPERF LSP0 LSPERF-LSP0
</code></pre>
<p>I want to extrac... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,827 | bash | # PowerShell to extract specific column from csv and store in a variable
My keys.csv file looks like this
```
PrjKey BldKey key
LS LOOKUPSNAP1 LS-LOOKUPSNAP1
LS LSUH3 LS-LSUH3
LSPERF LPMDS0 LSPERF-LPMDS0
LSPERF LSP0 LSPERF-LSP0
```
I want to extract the values column "key" and sto... | You had the right idea of using `Select-Object` to get the one property you want. The two issues you had was that `Select-Object key` returns and object array with a key property when it looks like you just want string array of keys. Also **never** use `Format-cmdlets` when you want to save the data or use it in anothe... |
32513203 | pipes and foreach loops | 11 | 2015-09-10 23:32:32 | <p>Recently, I've been playing with PowerShell, and I've noticed some weird behavior when using pipes and <code>foreach</code> loops that I couldn't understand.</p>
<p>This simple code works:</p>
<pre><code>$x = foreach ($i in gci){$i.length}
$x | measure -max
</code></pre>
<p>Makes sense.</p>
<p>But this code won'... | 14,013 | 3,232,836 | 2015-09-11 09:30:58 | 32,520,164 | 16 | 2015-09-11 09:30:58 | 1,630,171 | 2015-09-11 09:30:58 | https://stackoverflow.com/q/32513203 | https://stackoverflow.com/a/32520164 | <p>The <code>foreach</code> statement doesn't use the pipeline architecture, so its output cannot be passed to a pipeline directly (i.e. item by item). To be able to pass output from a <code>foreach</code> loop to a pipeline you must run the loop in a subexpression:</p>
<pre><code>$(foreach ($item in Get-ChildItem) { ... | <p>The <code>foreach</code> statement doesn't use the pipeline architecture, so its output cannot be passed to a pipeline directly (i.e. item by item). To be able to pass output from a <code>foreach</code> loop to a pipeline you must run the loop in a subexpression:</p> <pre><code>$(foreach ($item in Get-ChildItem) { ... | 526, 24067 | powershell, powershell-2.0 | <h1>pipes and foreach loops</h1>
<p>Recently, I've been playing with PowerShell, and I've noticed some weird behavior when using pipes and <code>foreach</code> loops that I couldn't understand.</p>
<p>This simple code works:</p>
<pre><code>$x = foreach ($i in gci){$i.length}
$x | measure -max
</code></pre>
<p>Makes ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,828 | bash | # pipes and foreach loops
Recently, I've been playing with PowerShell, and I've noticed some weird behavior when using pipes and `foreach` loops that I couldn't understand.
This simple code works:
```
$x = foreach ($i in gci){$i.length}
$x | measure -max
```
Makes sense.
But this code won't:
```
foreach ($i in gc... | The `foreach` statement doesn't use the pipeline architecture, so its output cannot be passed to a pipeline directly (i.e. item by item). To be able to pass output from a `foreach` loop to a pipeline you must run the loop in a subexpression:
```
$(foreach ($item in Get-ChildItem) { $item.Length }) | ...
```
or collec... |
31132936 | How to test if a string contains one of multiple substrings? | 11 | 2015-06-30 08:11:23 | <p>I wish to know if a string contains one of <code>abc</code>, <code>def</code>, <code>xyz</code>, etc. I could do it like:</p>
<pre><code>$a.Contains("abc") -or $a.Contains("def") -or $a.Contains("xyz")
</code></pre>
<p>Well it works, but I have to change code if this substring list changes, and the performance is ... | 41,124 | 4,927,124 | 2015-06-30 09:15:04 | 31,133,109 | 16 | 2015-06-30 08:20:31 | 1,163,423 | 2015-06-30 08:20:31 | https://stackoverflow.com/q/31132936 | https://stackoverflow.com/a/31133109 | <p>You could use the -match method and create the regex automatically using string.join:
</p>
<pre class="lang-powershell prettyprint-override"><code>$referenz = @('abc', 'def', 'xyz')
$referenzRegex = [string]::Join('|', $referenz) # create the regex
</code></pre>
<p>Usage:</p>
<pre class="lang-powershell prett... | <p>You could use the -match method and create the regex automatically using string.join: </p> <pre class="lang-powershell prettyprint-override"><code>$referenz = @('abc', 'def', 'xyz') $referenzRegex = [string]::Join('|', $referenz) # create the regex </code></pre> <p>Usage:</p> <pre class="lang-powershell prett... | 139, 526, 2936 | compare, powershell, string | <h1>How to test if a string contains one of multiple substrings?</h1>
<p>I wish to know if a string contains one of <code>abc</code>, <code>def</code>, <code>xyz</code>, etc. I could do it like:</p>
<pre><code>$a.Contains("abc") -or $a.Contains("def") -or $a.Contains("xyz")
</code></pre>
<p>Well it works, but I have ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,829 | bash | # How to test if a string contains one of multiple substrings?
I wish to know if a string contains one of `abc`, `def`, `xyz`, etc. I could do it like:
```
$a.Contains("abc") -or $a.Contains("def") -or $a.Contains("xyz")
```
Well it works, but I have to change code if this substring list changes, and the performance... | You could use the -match method and create the regex automatically using string.join:
```
$referenz = @('abc', 'def', 'xyz')
$referenzRegex = [string]::Join('|', $referenz) # create the regex
```
Usage:
```
"any string containing abc" -match $referenzRegex # true
"any non matching string" -match $referenzRegex #... |
31004140 | How do I silence the HEAD of a curl request while using the silent flag? | 11 | 2015-06-23 13:29:14 | <p>When I run the curl command and direct the data to a file, I get back the content of the site as expected.</p>
<pre><code>$ curl "www.site.com" > file.txt
$ head file.txt
Top of site
...
</code></pre>
<p>However, this command shows a progress bar, which I do not want: </p>
<pre><code> % Total % Received %... | 13,998 | 908,939 | 2020-08-25 06:45:52 | 31,004,282 | 16 | 2015-06-23 13:35:05 | 2,146,346 | 2019-08-25 18:23:38 | https://stackoverflow.com/q/31004140 | https://stackoverflow.com/a/31004282 | <p>Try this:</p>
<pre><code>curl --silent "www.site.com" > file.txt
</code></pre>
<p>If you wish, you can use the shorthand <code>-s</code>.</p>
| <p>Try this:</p> <pre><code>curl --silent "www.site.com" > file.txt </code></pre> <p>If you wish, you can use the shorthand <code>-s</code>.</p> | 387, 390, 1231, 1554, 5813 | bash, command-line, curl, pipe, shell | <h1>How do I silence the HEAD of a curl request while using the silent flag?</h1>
<p>When I run the curl command and direct the data to a file, I get back the content of the site as expected.</p>
<pre><code>$ curl "www.site.com" > file.txt
$ head file.txt
Top of site
...
</code></pre>
<p>However, this command show... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,830 | bash | # How do I silence the HEAD of a curl request while using the silent flag?
When I run the curl command and direct the data to a file, I get back the content of the site as expected.
```
$ curl "www.site.com" > file.txt
$ head file.txt
Top of site
...
```
However, this command shows a progress bar, which I do not wan... | Try this:
```
curl --silent "www.site.com" > file.txt
```
If you wish, you can use the shorthand `-s`. |
28723720 | Terminal cursor disappears when using Rails server and pry/byebug together | 11 | 2015-02-25 16:02:43 | <p>If I trigger <code>pry</code> or <code>byebug</code>, eventually while using the live-debug mode the cursor will disappear, and input will become slow/laggy. Ultimately I have to <code>Ctrl-C</code> and kill the unicorn/puma process. After I've quit the process the terminal works, but the cursor is sometimes still m... | 2,003 | 1,712,406 | 2015-02-26 03:01:35 | 28,723,862 | 16 | 2015-02-25 16:09:22 | 3,920,143 | 2015-02-25 16:09:22 | https://stackoverflow.com/q/28723720 | https://stackoverflow.com/a/28723862 | <p>When the cursor disappears you can enter the command <code>stty echo</code> and hit enter. That should bring the cursor back. </p>
| <p>When the cursor disappears you can enter the command <code>stty echo</code> and hit enter. That should bring the cursor back. </p> | 387, 4984, 72417, 85786 | bash, pry, ruby-on-rails, ruby-on-rails-4 | <h1>Terminal cursor disappears when using Rails server and pry/byebug together</h1>
<p>If I trigger <code>pry</code> or <code>byebug</code>, eventually while using the live-debug mode the cursor will disappear, and input will become slow/laggy. Ultimately I have to <code>Ctrl-C</code> and kill the unicorn/puma process.... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,831 | bash | # Terminal cursor disappears when using Rails server and pry/byebug together
If I trigger `pry` or `byebug`, eventually while using the live-debug mode the cursor will disappear, and input will become slow/laggy. Ultimately I have to `Ctrl-C` and kill the unicorn/puma process. After I've quit the process the terminal ... | When the cursor disappears you can enter the command `stty echo` and hit enter. That should bring the cursor back. |
28504839 | how to delete a file with quote in file name | 11 | 2015-02-13 17:03:24 | <p>When I do <code>ls</code> in my directory, get bunch of these:</p>
<pre><code>data.log".2015-01-22"
data.log".2015-01-23"
</code></pre>
<p>However when I do this:</p>
<pre><code>rm: cannot remove `data.log.2015-01-22': No such file or directory
</code></pre>
<p>If I could somehow do something lin... | 12,226 | 3,616,806 | 2021-12-11 08:26:26 | 28,527,909 | 16 | 2015-02-15 15:51:05 | 648,658 | 2021-01-10 09:35:10 | https://stackoverflow.com/q/28504839 | https://stackoverflow.com/a/28527909 | <p>If you only need to do this once in a while interactively, use</p>
<pre><code>rm -i -- *
</code></pre>
<p>and answer <code>y</code> or <code>n</code> as appropriate. This can be used to get rid of many files having funny characters in their name.</p>
<p>It has the advantage of not needing to type/escape funny charac... | <p>If you only need to do this once in a while interactively, use</p> <pre><code>rm -i -- * </code></pre> <p>and answer <code>y</code> or <code>n</code> as appropriate. This can be used to get rid of many files having funny characters in their name.</p> <p>It has the advantage of not needing to type/escape funny charac... | 387, 390 | bash, shell | <h1>how to delete a file with quote in file name</h1>
<p>When I do <code>ls</code> in my directory, get bunch of these:</p>
<pre><code>data.log".2015-01-22"
data.log".2015-01-23"
</code></pre>
<p>However when I do this:</p>
<pre><code>rm: cannot remove `data.log.2015-01-22': No such file or director... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,832 | bash | # how to delete a file with quote in file name
When I do `ls` in my directory, get bunch of these:
```
data.log".2015-01-22"
data.log".2015-01-23"
```
However when I do this:
```
rm: cannot remove `data.log.2015-01-22': No such file or directory
```
If I could somehow do something line `ls | escape quotes | xargs ... | If you only need to do this once in a while interactively, use
```
rm -i -- *
```
and answer `y` or `n` as appropriate. This can be used to get rid of many files having funny characters in their name.
It has the advantage of not needing to type/escape funny characters, blanks, etc, since the shell globbing with `*` ... |
27443368 | Azure Websites Kudu REST API - Authentication | 11 | 2014-12-12 12:08:14 | <p>I'm trying to use PowerShell to put an updated content file onto an Azure Website via the REST API. However, when supplying my credentials into <code>Invoke-RestMethod -Credentials</code> I am returned the HTML of the standard Azure login page.</p>
<p>How can I authenticate with Kudu from PowerShell? Thanks.</p>
| 5,780 | 107,783 | 2015-12-30 00:48:27 | 27,664,329 | 16 | 2014-12-27 04:29:44 | 1,081,786 | 2014-12-27 04:29:44 | https://stackoverflow.com/q/27443368 | https://stackoverflow.com/a/27664329 | <p>You can first get the website via Powershell and then use the publish credentials from the website to call the Kudu REST API. The example below will get the Kudu version.</p>
<pre><code>$website = Get-AzureWebsite -Name "WebsiteName"
$username = $website.PublishingUsername
$password = $website.PublishingPassword
... | <p>You can first get the website via Powershell and then use the publish credentials from the website to call the Kudu REST API. The example below will get the Kudu version.</p> <pre><code>$website = Get-AzureWebsite -Name "WebsiteName" $username = $website.PublishingUsername $password = $website.PublishingPassword ... | 364, 526, 81099, 116275 | azure-web-app-service, kudu, powershell, rest | <h1>Azure Websites Kudu REST API - Authentication</h1>
<p>I'm trying to use PowerShell to put an updated content file onto an Azure Website via the REST API. However, when supplying my credentials into <code>Invoke-RestMethod -Credentials</code> I am returned the HTML of the standard Azure login page.</p>
<p>How can I... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,833 | bash | # Azure Websites Kudu REST API - Authentication
I'm trying to use PowerShell to put an updated content file onto an Azure Website via the REST API. However, when supplying my credentials into `Invoke-RestMethod -Credentials` I am returned the HTML of the standard Azure login page.
How can I authenticate with Kudu fro... | You can first get the website via Powershell and then use the publish credentials from the website to call the Kudu REST API. The example below will get the Kudu version.
```
$website = Get-AzureWebsite -Name "WebsiteName"
$username = $website.PublishingUsername
$password = $website.PublishingPassword
$base64AuthInfo... |
25094004 | Extended POSIX utilities using command find on Mac OS X? | 11 | 2014-08-02 10:23:44 | <p>I try to do this command on my Mac OS X 10.9 Terminal:</p>
<pre><code>find / -type f -regextype posix-extended -regex "(.*A.*a.*.*)|(.*a.*A.*.*)" -exec tail -n 3 '{}' \;
</code></pre>
<p>But the Bash v 3.2 response is:</p>
<pre><code>find: -regextype: unknown primary or operator
</code></pre>
<p>I have made a de... | 4,001 | 3,901,849 | 2014-11-22 23:13:45 | 27,083,611 | 16 | 2014-11-22 23:13:45 | 2,171,044 | 2014-11-22 23:13:45 | https://stackoverflow.com/q/25094004 | https://stackoverflow.com/a/27083611 | <p>The simplest answer to your question is that on OS X you need to use the <code>-E</code> option instead of <code>-regextype posix-extended</code></p>
<p>ie:</p>
<blockquote>
<p>find / -type f <strong>-regextype posix-extended</strong> -regex "(.*A.<em>a.</em>.*)|(.*a.<em>A.</em>.*)" -exec tail -n 3 '{}' \;</p>
<... | <p>The simplest answer to your question is that on OS X you need to use the <code>-E</code> option instead of <code>-regextype posix-extended</code></p> <p>ie:</p> <blockquote> <p>find / -type f <strong>-regextype posix-extended</strong> -regex "(.*A.<em>a.</em>.*)|(.*a.<em>A.</em>.*)" -exec tail -n 3 '{}' \;</p> <... | 18, 369, 387, 391, 10193 | bash, find, macos, regex, terminal | <h1>Extended POSIX utilities using command find on Mac OS X?</h1>
<p>I try to do this command on my Mac OS X 10.9 Terminal:</p>
<pre><code>find / -type f -regextype posix-extended -regex "(.*A.*a.*.*)|(.*a.*A.*.*)" -exec tail -n 3 '{}' \;
</code></pre>
<p>But the Bash v 3.2 response is:</p>
<pre><code>find: -regexty... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,834 | bash | # Extended POSIX utilities using command find on Mac OS X?
I try to do this command on my Mac OS X 10.9 Terminal:
```
find / -type f -regextype posix-extended -regex "(.*A.*a.*.*)|(.*a.*A.*.*)" -exec tail -n 3 '{}' \;
```
But the Bash v 3.2 response is:
```
find: -regextype: unknown primary or operator
```
I have ... | The simplest answer to your question is that on OS X you need to use the `-E` option instead of `-regextype posix-extended`
ie:
> find / -type f **-regextype posix-extended** -regex "(.*A.*a.*.*)|(.*a.*A.*.*)" -exec tail -n 3 '{}' \;
becomes:
> find **-E** / -type f -regex "(.*A.*a.*.*)|(.*a.*A.*.*)" -exec tail -n ... |
26041934 | How does CVE-2014-7169 work? Breakdown of the test code | 11 | 2014-09-25 15:06:14 | <p>With a bash release which has been patched for shellshock</p>
<pre><code>$ bash --version
GNU bash, version 3.2.52(1)-release (x86_64-apple-darwin12)
Copyright (C) 2007 Free Software Foundation, Inc.
$ env x='() { :;}; echo vulnerable' bash -c "echo this is a test"
bash: warning: x: ignoring function definition at... | 2,039 | 2,891,365 | 2014-09-30 00:47:31 | 26,111,063 | 16 | 2014-09-30 00:47:31 | 371,250 | 2014-09-30 00:47:31 | https://stackoverflow.com/q/26041934 | https://stackoverflow.com/a/26111063 | <h2>The bug</h2>
<p>CVE-2014-7169 is a bug in bash's parser. Bash's parser uses a variable <code>eol_ungetc_lookahead</code> to ungetc characters across lines. That variable wasn't being properly reset from the <code>reset_parser</code> function, which is called e.g. on some syntax errors. Using that bug, it's possibl... | <h2>The bug</h2> <p>CVE-2014-7169 is a bug in bash's parser. Bash's parser uses a variable <code>eol_ungetc_lookahead</code> to ungetc characters across lines. That variable wasn't being properly reset from the <code>reset_parser</code> function, which is called e.g. on some syntax errors. Using that bug, it's possibl... | 387, 2172, 107178 | bash, exploit, shellshock-bash-bug | <h1>How does CVE-2014-7169 work? Breakdown of the test code</h1>
<p>With a bash release which has been patched for shellshock</p>
<pre><code>$ bash --version
GNU bash, version 3.2.52(1)-release (x86_64-apple-darwin12)
Copyright (C) 2007 Free Software Foundation, Inc.
$ env x='() { :;}; echo vulnerable' bash -c "echo ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,835 | bash | # How does CVE-2014-7169 work? Breakdown of the test code
With a bash release which has been patched for shellshock
```
$ bash --version
GNU bash, version 3.2.52(1)-release (x86_64-apple-darwin12)
Copyright (C) 2007 Free Software Foundation, Inc.
$ env x='() { :;}; echo vulnerable' bash -c "echo this is a test"
bash... | ## The bug
CVE-2014-7169 is a bug in bash's parser. Bash's parser uses a variable `eol_ungetc_lookahead` to ungetc characters across lines. That variable wasn't being properly reset from the `reset_parser` function, which is called e.g. on some syntax errors. Using that bug, it's possible to inject a character into th... |
26045893 | Powershell here-string expansion | 11 | 2014-09-25 18:46:23 | <p><strong>Here-strings</strong></p>
<p>There are some examples regarding Powershell 'here-string' but I have hardly come across 'here-string' expansion. so I posted this to be of some help.<br><br>
When you want to add some literal with line breaks, both single and double quotes do not need to be escaped and no need ... | 24,579 | 554,060 | 2015-10-31 17:47:38 | 26,045,894 | 16 | 2014-09-25 18:46:23 | 554,060 | 2014-09-25 23:25:29 | https://stackoverflow.com/q/26045893 | https://stackoverflow.com/a/26045894 | <p>Here is how to introduce CmdLet and a date variable to show current date like so:
<br>For example the following is what we want to achieve:</p>
<pre><code>Hello world! 09/25/2014 11:39:56
'(this will appear as is)'
!
</code></pre>
<p>Here is how:</p>
<pre><code>@"
Hello world! $(Get-Date)
'(this will appear as is... | <p>Here is how to introduce CmdLet and a date variable to show current date like so: <br>For example the following is what we want to achieve:</p> <pre><code>Hello world! 09/25/2014 11:39:56 '(this will appear as is)' ! </code></pre> <p>Here is how:</p> <pre><code>@" Hello world! $(Get-Date) '(this will appear as is... | 526, 73157 | powershell, powershell-3.0 | <h1>Powershell here-string expansion</h1>
<p><strong>Here-strings</strong></p>
<p>There are some examples regarding Powershell 'here-string' but I have hardly come across 'here-string' expansion. so I posted this to be of some help.<br><br>
When you want to add some literal with line breaks, both single and double quo... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,836 | bash | # Powershell here-string expansion
**Here-strings**
There are some examples regarding Powershell 'here-string' but I have hardly come across 'here-string' expansion. so I posted this to be of some help.
When you want to add some literal with line breaks, both single and double quotes do not need to be escaped an... | Here is how to introduce CmdLet and a date variable to show current date like so:
For example the following is what we want to achieve:
```
Hello world! 09/25/2014 11:39:56
'(this will appear as is)'
!
```
Here is how:
```
@"
Hello world! $(Get-Date)
'(this will appear as is)'
!
"@
```
Or with variable:
```
$my... |
23445175 | qwinsta /server:somesrv equivalent in Powershell? | 11 | 2014-05-03 13:38:48 | <p>When I run the <code>qwinsta /server:somesrv</code> command in <code>cmd</code> I can get a listing of all the current RDP sessions that are logged into a particular Windows server. </p>
<pre><code> SESSIONNAME USERNAME ID STATE TYPE DEVICE
console ... | 26,271 | 18,149 | 2024-09-26 00:08:07 | 23,454,741 | 16 | 2014-05-04 09:42:24 | 702,944 | 2023-02-25 19:15:34 | https://stackoverflow.com/q/23445175 | https://stackoverflow.com/a/23454741 | <p>There are multiple alternatives:</p>
<ul>
<li>Use the <a href="https://www.powershellgallery.com/packages/PSTerminalServices/1.0" rel="nofollow noreferrer">Terminal Services PowerShell Module</a>. <em>Easy solution</em>.</li>
<li>Writing a powershell wrapper that parses the output of <code>qwinsta</code> to objects.... | <p>There are multiple alternatives:</p> <ul> <li>Use the <a href="https://www.powershellgallery.com/packages/PSTerminalServices/1.0" rel="nofollow noreferrer">Terminal Services PowerShell Module</a>. <em>Easy solution</em>.</li> <li>Writing a powershell wrapper that parses the output of <code>qwinsta</code> to objects.... | 526, 3356 | powershell, remote-desktop | <h1>qwinsta /server:somesrv equivalent in Powershell?</h1>
<p>When I run the <code>qwinsta /server:somesrv</code> command in <code>cmd</code> I can get a listing of all the current RDP sessions that are logged into a particular Windows server. </p>
<pre><code> SESSIONNAME USERNAME ID STATE TY... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,837 | bash | # qwinsta /server:somesrv equivalent in Powershell?
When I run the `qwinsta /server:somesrv` command in `cmd` I can get a listing of all the current RDP sessions that are logged into a particular Windows server.
```
SESSIONNAME USERNAME ID STATE TYPE DEVICE
console ... | There are multiple alternatives:
- Use the [Terminal Services PowerShell Module](https://www.powershellgallery.com/packages/PSTerminalServices/1.0). *Easy solution*.
- Writing a powershell wrapper that parses the output of `qwinsta` to objects. *Easy solution. See example below*
- Use the `Cassia.DLL` .Net wrapper to ... |
20554032 | bash tail on a live log file, counting uniq lines with same date/time | 11 | 2013-12-12 20:54:08 | <p>I'm looking for a good way to tail on a live log file, and display number of lines with the same date/time.</p>
<p>Currently this is working:</p>
<pre><code> tail -F /var/logs/request.log | [cut the date-time] | uniq -c
</code></pre>
<p>BUT the performance is not good enough. There is a delay of more than one min... | 19,798 | 1,424,321 | 2015-03-28 22:16:21 | 20,558,267 | 16 | 2013-12-13 02:49:30 | 1,967,396 | 2013-12-13 02:49:30 | https://stackoverflow.com/q/20554032 | https://stackoverflow.com/a/20558267 | <p>Your problem is most likely related to buffering in your system, not anything intrinsically wrong with your line of code. I was able to create a test scenario where I could reproduce it - then make it go away. I hope it will work for you too.</p>
<p>Here is my test scenario. First I write a short script that writes... | <p>Your problem is most likely related to buffering in your system, not anything intrinsically wrong with your line of code. I was able to create a test scenario where I could reproduce it - then make it go away. I hope it will work for you too.</p> <p>Here is my test scenario. First I write a short script that writes... | 387, 942, 7896, 35617 | bash, logging, tail, uniq | <h1>bash tail on a live log file, counting uniq lines with same date/time</h1>
<p>I'm looking for a good way to tail on a live log file, and display number of lines with the same date/time.</p>
<p>Currently this is working:</p>
<pre><code> tail -F /var/logs/request.log | [cut the date-time] | uniq -c
</code></pre>
<... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,838 | bash | # bash tail on a live log file, counting uniq lines with same date/time
I'm looking for a good way to tail on a live log file, and display number of lines with the same date/time.
Currently this is working:
```
tail -F /var/logs/request.log | [cut the date-time] | uniq -c
```
BUT the performance is not good enough... | Your problem is most likely related to buffering in your system, not anything intrinsically wrong with your line of code. I was able to create a test scenario where I could reproduce it - then make it go away. I hope it will work for you too.
Here is my test scenario. First I write a short script that writes the time ... |
18277308 | Invoke remote powershell command from C# | 11 | 2013-08-16 15:45:47 | <p>I'm trying to run an invoke-command cmdlet using C# but I can't figure out the right syntax. I just want to run this simple command:</p>
<pre><code>invoke-command -ComputerName mycomp.mylab.com -ScriptBlock {"get-childitem C:\windows"}
</code></pre>
<p>In C# code, I have done the following:</p>
<pre><code>Initial... | 13,693 | 819,415 | 2017-08-11 15:11:14 | 18,277,368 | 16 | 2013-08-16 15:49:27 | 819,415 | 2013-08-16 15:49:27 | https://stackoverflow.com/q/18277308 | https://stackoverflow.com/a/18277368 | <p>Ah, the parameter to ScriptBlock itself needs to be of type ScriptBlock.</p>
<p>full code:</p>
<pre><code>InitialSessionState initial = InitialSessionState.CreateDefault();
Runspace runspace = RunspaceFactory.CreateRunspace(initial);
runspace.Open();
PowerShell ps = PowerShell.Create();
ps.Runspace = runspace;
ps.... | <p>Ah, the parameter to ScriptBlock itself needs to be of type ScriptBlock.</p> <p>full code:</p> <pre><code>InitialSessionState initial = InitialSessionState.CreateDefault(); Runspace runspace = RunspaceFactory.CreateRunspace(initial); runspace.Open(); PowerShell ps = PowerShell.Create(); ps.Runspace = runspace; ps.... | 1, 9, 526 | .net, c#, powershell | <h1>Invoke remote powershell command from C#</h1>
<p>I'm trying to run an invoke-command cmdlet using C# but I can't figure out the right syntax. I just want to run this simple command:</p>
<pre><code>invoke-command -ComputerName mycomp.mylab.com -ScriptBlock {"get-childitem C:\windows"}
</code></pre>
<p>In C# code, ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,839 | bash | # Invoke remote powershell command from C#
I'm trying to run an invoke-command cmdlet using C# but I can't figure out the right syntax. I just want to run this simple command:
```
invoke-command -ComputerName mycomp.mylab.com -ScriptBlock {"get-childitem C:\windows"}
```
In C# code, I have done the following:
```
I... | Ah, the parameter to ScriptBlock itself needs to be of type ScriptBlock.
full code:
```
InitialSessionState initial = InitialSessionState.CreateDefault();
Runspace runspace = RunspaceFactory.CreateRunspace(initial);
runspace.Open();
PowerShell ps = PowerShell.Create();
ps.Runspace = runspace;
ps.AddCommand("invoke-co... |
17723790 | How to get first character of variable | 11 | 2013-07-18 12:43:12 | <p>I'm trying to get the first character of a variable, but I'm getting a Bad substitution error. Can anyone help me fix it?</p>
<p>code is:</p>
<pre><code>while IFS=$'\n' read line
do
if [ ! ${line:0:1} == "#"] # Error on this line
then
eval echo "$line"
eval createSymlink $line
fi
done < /some/fil... | 18,433 | 264,276 | 2018-02-09 16:58:07 | 17,723,820 | 16 | 2013-07-18 12:44:54 | 1,983,854 | 2016-08-18 09:24:47 | https://stackoverflow.com/q/17723790 | https://stackoverflow.com/a/17723820 | <p>To get the first character of a variable you need to say:</p>
<pre><code>v="hello"
$ echo "${v:0:1}"
h
</code></pre>
<p>However, your code has a syntax error:</p>
<pre><code>[ ! ${line:0:1} == "#"]
# ^-- missing space
</code></pre>
<p>So this can do the trick:</p>
<pre><code>$ a="123456"
$ [... | <p>To get the first character of a variable you need to say:</p> <pre><code>v="hello" $ echo "${v:0:1}" h </code></pre> <p>However, your code has a syntax error:</p> <pre><code>[ ! ${line:0:1} == "#"] # ^-- missing space </code></pre> <p>So this can do the trick:</p> <pre><code>$ a="123456" $ [... | 387 | bash | <h1>How to get first character of variable</h1>
<p>I'm trying to get the first character of a variable, but I'm getting a Bad substitution error. Can anyone help me fix it?</p>
<p>code is:</p>
<pre><code>while IFS=$'\n' read line
do
if [ ! ${line:0:1} == "#"] # Error on this line
then
eval echo "$line"
e... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,840 | bash | # How to get first character of variable
I'm trying to get the first character of a variable, but I'm getting a Bad substitution error. Can anyone help me fix it?
code is:
```
while IFS=$'\n' read line
do
if [ ! ${line:0:1} == "#"] # Error on this line
then
eval echo "$line"
eval createSymlink $line
fi... | To get the first character of a variable you need to say:
```
v="hello"
$ echo "${v:0:1}"
h
```
However, your code has a syntax error:
```
[ ! ${line:0:1} == "#"]
# ^-- missing space
```
So this can do the trick:
```
$ a="123456"
$ [ ! "${a:0:1}" == "#" ] && echo "doesnt start with #"
doesnt st... |
15777232 | how can I echo/print specific lines from a bash variable | 11 | 2013-04-03 01:13:23 | <p>I am trying to print specific lines from a multi-line bash variable. I've found the following:</p>
<pre><code>while read line; do echo LINE: "$line"; done <<< "$x"
</code></pre>
<p>where x would be the variable, but that simply prints out all lines instead of just a single one (say line 1 for instance). H... | 27,511 | 1,161,841 | 2013-04-03 01:46:28 | 15,777,243 | 16 | 2013-04-03 01:14:38 | 140,750 | 2013-04-03 01:30:00 | https://stackoverflow.com/q/15777232 | https://stackoverflow.com/a/15777243 | <p>To print the Nth line: </p>
<pre><code>sed -n ${N}p <<< "$x"
</code></pre>
<p>or (more portably):</p>
<pre><code>sed -n ${N}p << EOF
$x
EOF
</code></pre>
<p>or</p>
<pre><code>echo "$x" | sed -n "$N"p
</code></pre>
<p>or</p>
<pre><code>echo "$x" | sed -n ${N}p
</code></pre>
<p>or (for the spe... | <p>To print the Nth line: </p> <pre><code>sed -n ${N}p <<< "$x" </code></pre> <p>or (more portably):</p> <pre><code>sed -n ${N}p << EOF $x EOF </code></pre> <p>or</p> <pre><code>echo "$x" | sed -n "$N"p </code></pre> <p>or</p> <pre><code>echo "$x" | sed -n ${N}p </code></pre> <p>or (for the spe... | 276, 387, 1012 | bash, debian, variables | <h1>how can I echo/print specific lines from a bash variable</h1>
<p>I am trying to print specific lines from a multi-line bash variable. I've found the following:</p>
<pre><code>while read line; do echo LINE: "$line"; done <<< "$x"
</code></pre>
<p>where x would be the variable, but that simply prints out a... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,841 | bash | # how can I echo/print specific lines from a bash variable
I am trying to print specific lines from a multi-line bash variable. I've found the following:
```
while read line; do echo LINE: "$line"; done <<< "$x"
```
where x would be the variable, but that simply prints out all lines instead of just a single one (say... | To print the Nth line:
```
sed -n ${N}p <<< "$x"
```
or (more portably):
```
sed -n ${N}p << EOF
$x
EOF
```
or
```
echo "$x" | sed -n "$N"p
```
or
```
echo "$x" | sed -n ${N}p
```
or (for the specific case N==3)
```
echo "$x" | sed -n 3p
```
or
```
while read line; do echo LINE: "$line"; done <<< "$x" | sed ... |
13223279 | how can a sourced file inherit trap DEBUG? | 11 | 2012-11-04 21:47:04 | <p>Running the following snippet:</p>
<pre><code>#!/bin/bash
function preexec ()
{
echo -e "\n-->preexec command: $BASH_COMMAND"
}
trap 'preexec' DEBUG
function testfunc ()
{
echo "testfunc called $1"
}
testfunc "main"
source "source.sh"
exit 0
</code></pre>
<p><br>
where source.sh is</p>
<pre><code>#... | 2,184 | 1,032,370 | 2017-04-10 15:01:13 | 14,674,293 | 16 | 2013-02-03 15:53:45 | 1,032,370 | 2013-12-07 18:10:45 | https://stackoverflow.com/q/13223279 | https://stackoverflow.com/a/14674293 | <p>I solved setting in the main file:</p>
<pre><code>set -o functrace
</code></pre>
<p><br>
From BASH man:</p>
<blockquote>
<p>If set, any traps on DEBUG and RETURN are inherited by shell
functions, command substitutions, and commands executed in a subshell
environment. The DEBUG and RETURN traps are normally ... | <p>I solved setting in the main file:</p> <pre><code>set -o functrace </code></pre> <p><br> From BASH man:</p> <blockquote> <p>If set, any traps on DEBUG and RETURN are inherited by shell functions, command substitutions, and commands executed in a subshell environment. The DEBUG and RETURN traps are normally ... | 277, 387, 124485 | bash, bash-trap, debugging | <h1>how can a sourced file inherit trap DEBUG?</h1>
<p>Running the following snippet:</p>
<pre><code>#!/bin/bash
function preexec ()
{
echo -e "\n-->preexec command: $BASH_COMMAND"
}
trap 'preexec' DEBUG
function testfunc ()
{
echo "testfunc called $1"
}
testfunc "main"
source "source.sh"
exit 0
</code>... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,842 | bash | # how can a sourced file inherit trap DEBUG?
Running the following snippet:
```
#!/bin/bash
function preexec ()
{
echo -e "\n-->preexec command: $BASH_COMMAND"
}
trap 'preexec' DEBUG
function testfunc ()
{
echo "testfunc called $1"
}
testfunc "main"
source "source.sh"
exit 0
```
where source.sh is
```
#... | I solved setting in the main file:
```
set -o functrace
```
From BASH man:
> If set, any traps on DEBUG and RETURN are inherited by shell
> functions, command substitutions, and commands executed in a subshell
> environment. The DEBUG and RETURN traps are normally not inherited in
> such cases.
Being *'source'* a s... |
13736385 | How to write a shell script that checks if git repository is up to date? | 11 | 2012-12-06 03:15:31 | <pre><code>#!/bin/bash
#gedit tidy plugin
init=false
SRC_DIR=~/repos
DIRECTORY="Gedit-Clientside-Plugin"
#making repos directory
if [ ! -d "$SRC_DIR" ]; then mkdir $SRC_DIR; fi
if [ ! -d "$SRC_DIR/$DIRECTORY" ]; then
init=true
cd $SRC_DIR && pwd && git clone git://github.com/trentrichardson/... | 17,412 | 751,969 | 2013-06-04 14:33:34 | 13,738,316 | 16 | 2012-12-06 06:45:18 | 6,309 | 2012-12-06 09:24:11 | https://stackoverflow.com/q/13736385 | https://stackoverflow.com/a/13738316 | <p>I would rather use the solution of "<a href="https://stackoverflow.com/a/12791408/6309">git: check if pull needed</a>":</p>
<pre><code>git fetch origin
reslog=$(git log HEAD..origin/master --oneline)
if [[ "${reslog}" != "" ]] ; then
git merge origin/master # completing the pull
...
</code></pre>
| <p>I would rather use the solution of "<a href="https://stackoverflow.com/a/12791408/6309">git: check if pull needed</a>":</p> <pre><code>git fetch origin reslog=$(git log HEAD..origin/master --oneline) if [[ "${reslog}" != "" ]] ; then git merge origin/master # completing the pull ... </code></pre> | 119, 387, 390 | bash, git, shell | <h1>How to write a shell script that checks if git repository is up to date?</h1>
<pre><code>#!/bin/bash
#gedit tidy plugin
init=false
SRC_DIR=~/repos
DIRECTORY="Gedit-Clientside-Plugin"
#making repos directory
if [ ! -d "$SRC_DIR" ]; then mkdir $SRC_DIR; fi
if [ ! -d "$SRC_DIR/$DIRECTORY" ]; then
init=true
... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,843 | bash | # How to write a shell script that checks if git repository is up to date?
```
#!/bin/bash
#gedit tidy plugin
init=false
SRC_DIR=~/repos
DIRECTORY="Gedit-Clientside-Plugin"
#making repos directory
if [ ! -d "$SRC_DIR" ]; then mkdir $SRC_DIR; fi
if [ ! -d "$SRC_DIR/$DIRECTORY" ]; then
init=true
cd $SRC_DIR ... | I would rather use the solution of "[git: check if pull needed](https://stackoverflow.com/a/12791408/6309)":
```
git fetch origin
reslog=$(git log HEAD..origin/master --oneline)
if [[ "${reslog}" != "" ]] ; then
git merge origin/master # completing the pull
...
``` |
12569123 | regular expression extract string after a colon in bash | 11 | 2012-09-24 16:27:13 | <p>I need to extract the string after the <code>:</code> in an example below:</p>
<p><code>package:project.abc.def</code></p>
<p>Where i would get <code>project.abc.def</code> as a result.</p>
<p>I am attempting this in bash and i believe i have a regular expression that will work <code>:([^:]*)$</code>.</p>
<p>In ... | 17,872 | 427,763 | 2014-08-26 22:37:49 | 12,569,202 | 16 | 2012-09-24 16:33:09 | 1,404,992 | 2014-08-26 22:37:49 | https://stackoverflow.com/q/12569123 | https://stackoverflow.com/a/12569202 | <p>There is no need for a regex here, just a simple prefix substitution:</p>
<pre><code>$ apk="package:project.abc.def"
$ apk=${apk##package:}
project.abc.def
</code></pre>
<p>The ## syntax is one of bash's parameters expansions. Instead of #, % can be used to trim the end. See <a href="https://www.gnu.org/software/b... | <p>There is no need for a regex here, just a simple prefix substitution:</p> <pre><code>$ apk="package:project.abc.def" $ apk=${apk##package:} project.abc.def </code></pre> <p>The ## syntax is one of bash's parameters expansions. Instead of #, % can be used to trim the end. See <a href="https://www.gnu.org/software/b... | 18, 387 | bash, regex | <h1>regular expression extract string after a colon in bash</h1>
<p>I need to extract the string after the <code>:</code> in an example below:</p>
<p><code>package:project.abc.def</code></p>
<p>Where i would get <code>project.abc.def</code> as a result.</p>
<p>I am attempting this in bash and i believe i have a regu... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,844 | bash | # regular expression extract string after a colon in bash
I need to extract the string after the `:` in an example below:
`package:project.abc.def`
Where i would get `project.abc.def` as a result.
I am attempting this in bash and i believe i have a regular expression that will work `:([^:]*)$`.
In my bash script i... | There is no need for a regex here, just a simple prefix substitution:
```
$ apk="package:project.abc.def"
$ apk=${apk##package:}
project.abc.def
```
The ## syntax is one of bash's parameters expansions. Instead of #, % can be used to trim the end. See [this section](https://www.gnu.org/software/bash/manual/html_node/... |
11551509 | Quick benchmark from the command line | 11 | 2012-07-18 22:50:49 | <p>I'd like to benchmark a PHP script, but this would equally apply to anything that can be run from the command line.</p>
<p>Using bash is there a simple way to benchmark a script, i.e. run a command multiple times and time how long it takes?</p>
| 6,658 | 1,196,970 | 2022-06-18 12:26:42 | 11,555,395 | 16 | 2012-07-19 06:53:10 | 217,071 | 2012-07-19 06:59:58 | https://stackoverflow.com/q/11551509 | https://stackoverflow.com/a/11555395 | <p>In command line, you can:</p>
<pre><code>$ time php foobar.php
</code></pre>
<p>Here <code>time</code> is a bash built-in.</p>
<p>For multiple runs:</p>
<pre><code>$ time for a in {1..10}; do php foobar.php; done
real 0m13.042s
user 0m0.021s
sys 0m0.044s
</code></pre>
<p>However, you need to calculate... | <p>In command line, you can:</p> <pre><code>$ time php foobar.php </code></pre> <p>Here <code>time</code> is a bash built-in.</p> <p>For multiple runs:</p> <pre><code>$ time for a in {1..10}; do php foobar.php; done real 0m13.042s user 0m0.021s sys 0m0.044s </code></pre> <p>However, you need to calculate... | 5, 387, 722 | bash, benchmarking, php | <h1>Quick benchmark from the command line</h1>
<p>I'd like to benchmark a PHP script, but this would equally apply to anything that can be run from the command line.</p>
<p>Using bash is there a simple way to benchmark a script, i.e. run a command multiple times and time how long it takes?</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,845 | bash | # Quick benchmark from the command line
I'd like to benchmark a PHP script, but this would equally apply to anything that can be run from the command line.
Using bash is there a simple way to benchmark a script, i.e. run a command multiple times and time how long it takes? | In command line, you can:
```
$ time php foobar.php
```
Here `time` is a bash built-in.
For multiple runs:
```
$ time for a in {1..10}; do php foobar.php; done
real 0m13.042s
user 0m0.021s
sys 0m0.044s
```
However, you need to calculate the average time by hand. |
10718065 | Modifying Visual Studio solution and project files with PowerShell | 11 | 2012-05-23 10:27:16 | <p>We are currently reorganizing our source code, moving stuff around in a new directory
structure. This impacts our Visual Studio solution and project files, where things like assembly references, possibly output directories, pre and post build events, and so on ... must be updated to reflect our changes.</p>
<p>Sinc... | 9,060 | 311,712 | 2023-01-09 20:54:24 | 10,861,645 | 16 | 2012-06-02 10:39:35 | 30,321 | 2012-07-20 09:33:23 | https://stackoverflow.com/q/10718065 | https://stackoverflow.com/a/10861645 | <p>In my experience, the easiest way to manipulate Visual Studio solutions using PowerShell (from within or outside of Visual Studio) is to load the project file as XML and use PowerShell to manipulate it.</p>
<pre class="lang-powershell prettyprint-override"><code>$proj = [xml](get-content Path\To\MyProject.csproj)
$... | <p>In my experience, the easiest way to manipulate Visual Studio solutions using PowerShell (from within or outside of Visual Studio) is to load the project file as XML and use PowerShell to manipulate it.</p> <pre class="lang-powershell prettyprint-override"><code>$proj = [xml](get-content Path\To\MyProject.csproj) $... | 526, 1362, 14456 | automation, powershell, visual-studio-2010 | <h1>Modifying Visual Studio solution and project files with PowerShell</h1>
<p>We are currently reorganizing our source code, moving stuff around in a new directory
structure. This impacts our Visual Studio solution and project files, where things like assembly references, possibly output directories, pre and post buil... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,846 | bash | # Modifying Visual Studio solution and project files with PowerShell
We are currently reorganizing our source code, moving stuff around in a new directory
structure. This impacts our Visual Studio solution and project files, where things like assembly references, possibly output directories, pre and post build events,... | In my experience, the easiest way to manipulate Visual Studio solutions using PowerShell (from within or outside of Visual Studio) is to load the project file as XML and use PowerShell to manipulate it.
```
$proj = [xml](get-content Path\To\MyProject.csproj)
$proj.GetElementsByTagName("PostBuildEvent") | foreach {
... |
9589092 | Read input from redirected stdin with python | 11 | 2012-03-06 17:47:36 | <p>I have this loop that reads lines from stdin until a newline is entered, however, this only works from typing in the input. How do I get the program to read lines from a redirected stdin via the command line?</p>
<p>For instance:</p>
<pre><code>$ python graph.py < input.input
</code></pre>
<p>Here is the loop ... | 31,431 | 412,520 | 2020-06-28 14:43:39 | 9,589,320 | 16 | 2012-03-06 18:02:09 | 916,657 | 2012-03-06 18:02:09 | https://stackoverflow.com/q/9589092 | https://stackoverflow.com/a/9589320 | <p>As others have mentioned, probably your condition <code>line == '\n'</code> never holds true. The proper solution would be to use a loop like:</p>
<pre><code>for line in sys.stdin:
stripped = line.strip()
if not stripped: break
lines.append(stripped)
</code></pre>
| <p>As others have mentioned, probably your condition <code>line == '\n'</code> never holds true. The proper solution would be to use a loop like:</p> <pre><code>for line in sys.stdin: stripped = line.strip() if not stripped: break lines.append(stripped) </code></pre> | 16, 390, 1701 | python, shell, stdin | <h1>Read input from redirected stdin with python</h1>
<p>I have this loop that reads lines from stdin until a newline is entered, however, this only works from typing in the input. How do I get the program to read lines from a redirected stdin via the command line?</p>
<p>For instance:</p>
<pre><code>$ python graph.p... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,847 | bash | # Read input from redirected stdin with python
I have this loop that reads lines from stdin until a newline is entered, however, this only works from typing in the input. How do I get the program to read lines from a redirected stdin via the command line?
For instance:
```
$ python graph.py < input.input
```
Here i... | As others have mentioned, probably your condition `line == '\n'` never holds true. The proper solution would be to use a loop like:
```
for line in sys.stdin:
stripped = line.strip()
if not stripped: break
lines.append(stripped)
``` |
8343894 | AES encrypt with openssl command line tool, and decrypt in Java | 11 | 2011-12-01 15:32:23 | <p>I have a bash script that uses the openssl tool to encrypt.</p>
<pre><code>#!/bin/bash
key128="1234567890123456"
iv="1234567890123456"
openssl enc -aes-128-cbc -in test -out test.enc -K $key128 -iv $iv
</code></pre>
<p>And Java code that tries to decrypt the file produced by the script.</p>
<pre><code>public cla... | 54,051 | 533,212 | 2011-12-02 05:07:30 | 8,352,010 | 16 | 2011-12-02 05:07:30 | 533,212 | 2011-12-02 05:07:30 | https://stackoverflow.com/q/8343894 | https://stackoverflow.com/a/8352010 | <p>As @Polynomial mentioned above, the keys and iv's don't match between the bash script and Java code. Changing the bash script to the following solves the problem.</p>
<pre><code>#!/bin/bash
key128="01020304050607080900010203040506"
iv="01020304050607080900010203040506"
openssl enc -aes-128-cbc -in test -out test.... | <p>As @Polynomial mentioned above, the keys and iv's don't match between the bash script and Java code. Changing the bash script to the following solves the problem.</p> <pre><code>#!/bin/bash key128="01020304050607080900010203040506" iv="01020304050607080900010203040506" openssl enc -aes-128-cbc -in test -out test.... | 17, 219, 387, 2387, 6728 | aes, bash, cryptography, encryption, java | <h1>AES encrypt with openssl command line tool, and decrypt in Java</h1>
<p>I have a bash script that uses the openssl tool to encrypt.</p>
<pre><code>#!/bin/bash
key128="1234567890123456"
iv="1234567890123456"
openssl enc -aes-128-cbc -in test -out test.enc -K $key128 -iv $iv
</code></pre>
<p>And Java code that tri... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,848 | bash | # AES encrypt with openssl command line tool, and decrypt in Java
I have a bash script that uses the openssl tool to encrypt.
```
#!/bin/bash
key128="1234567890123456"
iv="1234567890123456"
openssl enc -aes-128-cbc -in test -out test.enc -K $key128 -iv $iv
```
And Java code that tries to decrypt the file produced b... | As @Polynomial mentioned above, the keys and iv's don't match between the bash script and Java code. Changing the bash script to the following solves the problem.
```
#!/bin/bash
key128="01020304050607080900010203040506"
iv="01020304050607080900010203040506"
openssl enc -aes-128-cbc -in test -out test.enc -K $key128 ... |
8086191 | Create Binary files in UNIX | 11 | 2011-11-10 20:58:30 | <p>This question was out there for a while and I thought I should offer some bonus points if I can get it to work. </p>
<h1>What did I do…</h1>
<p>Recently at work, I wrote a parser that would convert a binary file in a readable format. Binary file isn't an Ascii file with <code>10101010</code> characters. It has bee... | 12,464 | 970,195 | 2017-01-12 12:38:06 | 8,301,961 | 16 | 2011-11-28 20:35:26 | null | 2011-11-29 08:31:47 | https://stackoverflow.com/q/8086191 | https://stackoverflow.com/a/8301961 | <p>You can use <a href="http://linux.die.net/man/1/xxd." rel="noreferrer"><strong>xxd</strong></a> to convert to and from binary files / hexdumps quite simply.</p>
<p>data to hex </p>
<pre><code>echo Hello | xxd -p
48656c6c6f0a
</code></pre>
<p>hex to data</p>
<pre><code>echo 48656c6c6f0a | xxd -r -p
Hello
</code... | <p>You can use <a href="http://linux.die.net/man/1/xxd." rel="noreferrer"><strong>xxd</strong></a> to convert to and from binary files / hexdumps quite simply.</p> <p>data to hex </p> <pre><code>echo Hello | xxd -p 48656c6c6f0a </code></pre> <p>hex to data</p> <pre><code>echo 48656c6c6f0a | xxd -r -p Hello </code... | 387, 1357, 2834, 5004, 73656 | bash, binaryfiles, hexdump, parsing, xxd | <h1>Create Binary files in UNIX</h1>
<p>This question was out there for a while and I thought I should offer some bonus points if I can get it to work. </p>
<h1>What did I do…</h1>
<p>Recently at work, I wrote a parser that would convert a binary file in a readable format. Binary file isn't an Ascii file with <code>1... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,849 | bash | # Create Binary files in UNIX
This question was out there for a while and I thought I should offer some bonus points if I can get it to work.
# What did I do…
Recently at work, I wrote a parser that would convert a binary file in a readable format. Binary file isn't an Ascii file with `10101010` characters. It has b... | You can use [**xxd**](http://linux.die.net/man/1/xxd.) to convert to and from binary files / hexdumps quite simply.
data to hex
```
echo Hello | xxd -p
48656c6c6f0a
```
hex to data
```
echo 48656c6c6f0a | xxd -r -p
Hello
```
or
```
echo 48 65 6c 6c 6f 0a | xxd -r -p
Hello
```
The `-p` is postscript mode which ... |
7907055 | -bash: /usr/local/bin/heroku: /usr/local/bin/ruby: bad interpreter: No such file or directory | 11 | 2011-10-26 18:18:43 | <p>Whenever I open a new terminal window I now get:</p>
<p><code>-bash: /usr/local/bin/heroku: /usr/local/bin/ruby: bad interpreter: No such file or directory</code></p>
<p>Any idea as to why this is happening and how to get rid of it?</p>
| 11,619 | 435,471 | 2018-03-13 20:41:01 | 7,907,130 | 16 | 2011-10-26 18:26:17 | 836,407 | 2011-10-26 18:26:17 | https://stackoverflow.com/q/7907055 | https://stackoverflow.com/a/7907130 | <p>Make sure the first line of the file <code>/usr/local/bin/heroku</code> is <code>#!/path/to/ruby</code>. You may need to change it from <code>/usr/local/bin/ruby</code> to <code>/usr/bin/ruby</code>, or if you cannot find the <code>ruby</code> executable, type <code>which ruby</code> or <code>updatedb && lo... | <p>Make sure the first line of the file <code>/usr/local/bin/heroku</code> is <code>#!/path/to/ruby</code>. You may need to change it from <code>/usr/local/bin/ruby</code> to <code>/usr/bin/ruby</code>, or if you cannot find the <code>ruby</code> executable, type <code>which ruby</code> or <code>updatedb && lo... | 12, 387, 8279 | bash, heroku, ruby | <h1>-bash: /usr/local/bin/heroku: /usr/local/bin/ruby: bad interpreter: No such file or directory</h1>
<p>Whenever I open a new terminal window I now get:</p>
<p><code>-bash: /usr/local/bin/heroku: /usr/local/bin/ruby: bad interpreter: No such file or directory</code></p>
<p>Any idea as to why this is happening and h... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,850 | bash | # -bash: /usr/local/bin/heroku: /usr/local/bin/ruby: bad interpreter: No such file or directory
Whenever I open a new terminal window I now get:
`-bash: /usr/local/bin/heroku: /usr/local/bin/ruby: bad interpreter: No such file or directory`
Any idea as to why this is happening and how to get rid of it? | Make sure the first line of the file `/usr/local/bin/heroku` is `#!/path/to/ruby`. You may need to change it from `/usr/local/bin/ruby` to `/usr/bin/ruby`, or if you cannot find the `ruby` executable, type `which ruby` or `updatedb && locate ruby` to find it.
---
If the above doesn't work...
Check your `~/.bashrc`, ... |
7817637 | Bash: How do I make sub-processes of a script be terminated, when the script is terminated? | 11 | 2011-10-19 07:00:47 | <p>The question applies to a script such as the following:</p>
<h2>Script</h2>
<pre><code>#!/bin/sh
SRC="/tmp/my-server-logs"
echo "STARTING GREP JOBS..."
for f in `find ${SRC} -name '*log*2011*' | sort --reverse`
do
(
OUT=`nice grep -ci -E "${1}" "${f}"`
if [ "${OUT}" != "0" ]
then
... | 4,697 | 964,681 | 2014-02-07 14:16:31 | 7,817,949 | 16 | 2011-10-19 07:34:57 | 918 | 2011-10-19 08:00:54 | https://stackoverflow.com/q/7817637 | https://stackoverflow.com/a/7817949 | <p>Write a trap for <code>Ctrl+c</code> and in the trap kill all of the subprocesses. Put this before your <code>wait</code> command.</p>
<pre><code>function handle_sigint()
{
for proc in `jobs -p`
do
kill $proc
done
}
trap handle_sigint SIGINT
</code></pre>
| <p>Write a trap for <code>Ctrl+c</code> and in the trap kill all of the subprocesses. Put this before your <code>wait</code> command.</p> <pre><code>function handle_sigint() { for proc in `jobs -p` do kill $proc done } trap handle_sigint SIGINT </code></pre> | 58, 387, 2348, 5643 | bash, linux, subprocess, termination | <h1>Bash: How do I make sub-processes of a script be terminated, when the script is terminated?</h1>
<p>The question applies to a script such as the following:</p>
<h2>Script</h2>
<pre><code>#!/bin/sh
SRC="/tmp/my-server-logs"
echo "STARTING GREP JOBS..."
for f in `find ${SRC} -name '*log*2011*' | sort --reverse`
d... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,851 | bash | # Bash: How do I make sub-processes of a script be terminated, when the script is terminated?
The question applies to a script such as the following:
## Script
```
#!/bin/sh
SRC="/tmp/my-server-logs"
echo "STARTING GREP JOBS..."
for f in `find ${SRC} -name '*log*2011*' | sort --reverse`
do
(
OUT=`nice ... | Write a trap for `Ctrl+c` and in the trap kill all of the subprocesses. Put this before your `wait` command.
```
function handle_sigint()
{
for proc in `jobs -p`
do
kill $proc
done
}
trap handle_sigint SIGINT
``` |
6816923 | What does "- <" mean when you run powershell? | 11 | 2011-07-25 13:34:17 | <p>The recommended way to run scripts is </p>
<pre><code>powershell.exe -NonInteractive -Command " & some.ps1 "
</code></pre>
<p>However for example TeamCity PowerShell runner uses:</p>
<pre><code>powershell.exe -NonInteractive -Command - < some.ps1
</code></pre>
<p>I do not have an idea what "- <" means... | 1,123 | 38,975 | 2011-07-25 13:48:07 | 6,817,031 | 16 | 2011-07-25 13:42:10 | 22,211 | 2011-07-25 13:47:46 | https://stackoverflow.com/q/6816923 | https://stackoverflow.com/a/6817031 | <p>Because <code>powershell.exe</code> is being invoked through the Windows shell, it is the same as if you were on a normal command prompt (<code>cmd.exe</code>). In that situation <code><</code> pipes a file to the standard input (<code>stdin</code>) of the previous command. The help for <code>powershell.exe</code... | <p>Because <code>powershell.exe</code> is being invoked through the Windows shell, it is the same as if you were on a normal command prompt (<code>cmd.exe</code>). In that situation <code><</code> pipes a file to the standard input (<code>stdin</code>) of the previous command. The help for <code>powershell.exe</code... | 526, 604 | powershell, teamcity | <h1>What does "- <" mean when you run powershell?</h1>
<p>The recommended way to run scripts is </p>
<pre><code>powershell.exe -NonInteractive -Command " & some.ps1 "
</code></pre>
<p>However for example TeamCity PowerShell runner uses:</p>
<pre><code>powershell.exe -NonInteractive -Command - < some.ps1
</co... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,852 | bash | # What does "- <" mean when you run powershell?
The recommended way to run scripts is
```
powershell.exe -NonInteractive -Command " & some.ps1 "
```
However for example TeamCity PowerShell runner uses:
```
powershell.exe -NonInteractive -Command - < some.ps1
```
I do not have an idea what "- <" means and cannot fi... | Because `powershell.exe` is being invoked through the Windows shell, it is the same as if you were on a normal command prompt (`cmd.exe`). In that situation `<` pipes a file to the standard input (`stdin`) of the previous command. The help for `powershell.exe` states that if the value of `-Command` is simply `-`, the c... |
6618427 | xargs jar tvf - does not work | 11 | 2011-07-07 23:43:53 | <p>Objective: to list files in all jars.</p>
<p>This works:</p>
<pre><code>for f in `find . -name "*.jar"`; do jar tvf $f; done
</code></pre>
<p>This works too:</p>
<pre><code>find . -name "*.jar" -exec jar tvf {} \;
</code></pre>
<p>This does not (it does not print any output):</p>
<pre><code>find . -name "*.jar... | 3,656 | 45,525 | 2019-07-30 19:03:02 | 6,618,445 | 16 | 2011-07-07 23:46:54 | 567,435 | 2011-07-07 23:46:54 | https://stackoverflow.com/q/6618427 | https://stackoverflow.com/a/6618445 | <p>Does this works</p>
<pre><code>find . -name "*.jar"|xargs -n 1 jar -tvf
</code></pre>
| <p>Does this works</p> <pre><code>find . -name "*.jar"|xargs -n 1 jar -tvf </code></pre> | 387, 10326 | bash, xargs | <h1>xargs jar tvf - does not work</h1>
<p>Objective: to list files in all jars.</p>
<p>This works:</p>
<pre><code>for f in `find . -name "*.jar"`; do jar tvf $f; done
</code></pre>
<p>This works too:</p>
<pre><code>find . -name "*.jar" -exec jar tvf {} \;
</code></pre>
<p>This does not (it does not print any outpu... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,853 | bash | # xargs jar tvf - does not work
Objective: to list files in all jars.
This works:
```
for f in `find . -name "*.jar"`; do jar tvf $f; done
```
This works too:
```
find . -name "*.jar" -exec jar tvf {} \;
```
This does not (it does not print any output):
```
find . -name "*.jar" | xargs jar tvf
```
Why does the ... | Does this works
```
find . -name "*.jar"|xargs -n 1 jar -tvf
``` |
4464467 | Add group "Everyone" to directory and all of it's sub-directories | 11 | 2010-12-16 19:08:48 | <p>I'm currently using Vista 32-bit. How do I add the Windows security group "Everyone" and give full control to a directory and all of it's sub-directories and all files? Is there a powershell script that I could use?</p>
<p>Thanks!</p>
| 27,037 | 349,308 | 2014-07-14 20:41:17 | 4,466,027 | 16 | 2010-12-16 22:32:08 | 349,308 | 2010-12-16 22:32:08 | https://stackoverflow.com/q/4464467 | https://stackoverflow.com/a/4466027 | <p>I've expanded on martona's snippet and was able to give access to all folders and sub-folders. Here's my code -</p>
<pre><code>$FilesAndFolders = gci "c:\data" -recurse | % {$_.FullName}
foreach($FileAndFolder in $FilesAndFolders)
{
#using get-item instead because some of the folders have '[' or ']' character a... | <p>I've expanded on martona's snippet and was able to give access to all folders and sub-folders. Here's my code -</p> <pre><code>$FilesAndFolders = gci "c:\data" -recurse | % {$_.FullName} foreach($FileAndFolder in $FilesAndFolders) { #using get-item instead because some of the folders have '[' or ']' character a... | 64, 136, 526, 8084 | powershell, security, usergroups, windows | <h1>Add group "Everyone" to directory and all of it's sub-directories</h1>
<p>I'm currently using Vista 32-bit. How do I add the Windows security group "Everyone" and give full control to a directory and all of it's sub-directories and all files? Is there a powershell script that I could use?</p>
<p>Thanks!</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,854 | bash | # Add group "Everyone" to directory and all of it's sub-directories
I'm currently using Vista 32-bit. How do I add the Windows security group "Everyone" and give full control to a directory and all of it's sub-directories and all files? Is there a powershell script that I could use?
Thanks! | I've expanded on martona's snippet and was able to give access to all folders and sub-folders. Here's my code -
```
$FilesAndFolders = gci "c:\data" -recurse | % {$_.FullName}
foreach($FileAndFolder in $FilesAndFolders)
{
#using get-item instead because some of the folders have '[' or ']' character and Powershell ... |
3707116 | git: stage only new files | 11 | 2010-09-14 08:11:51 | <p>When I have:</p>
<ul>
<li>dirty working directory,</li>
<li>dirty staging area,</li>
<li>and I copied some new files to the project,</li>
</ul>
<p>how do I stage only the new ones?</p>
<pre><code>git alias adduntracked=…
</code></pre>
| 4,273 | 234,780 | 2016-09-15 07:42:25 | 3,709,301 | 16 | 2010-09-14 13:28:17 | 67,022 | 2012-05-21 12:52:25 | https://stackoverflow.com/q/3707116 | https://stackoverflow.com/a/3709301 | <p>This alias will respect your ignore patterns (builtin, global and per-directory, as described by the help for <code>git-ls-files --exclude-standard</code>). It will run at the top level of your tree.</p>
<pre><code>[alias]
adduntracked=!git add $(git ls-files -o --exclude-standard)
</code></pre>
| <p>This alias will respect your ignore patterns (builtin, global and per-directory, as described by the help for <code>git-ls-files --exclude-standard</code>). It will run at the top level of your tree.</p> <pre><code>[alias] adduntracked=!git add $(git ls-files -o --exclude-standard) </code></pre> | 119, 387, 531 | bash, git, scripting | <h1>git: stage only new files</h1>
<p>When I have:</p>
<ul>
<li>dirty working directory,</li>
<li>dirty staging area,</li>
<li>and I copied some new files to the project,</li>
</ul>
<p>how do I stage only the new ones?</p>
<pre><code>git alias adduntracked=…
</code></pre>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,855 | bash | # git: stage only new files
When I have:
- dirty working directory,
- dirty staging area,
- and I copied some new files to the project,
how do I stage only the new ones?
```
git alias adduntracked=…
``` | This alias will respect your ignore patterns (builtin, global and per-directory, as described by the help for `git-ls-files --exclude-standard`). It will run at the top level of your tree.
```
[alias]
adduntracked=!git add $(git ls-files -o --exclude-standard)
``` |
3708647 | replace the first line of text from a file | 11 | 2010-09-14 12:01:35 | <p>I would like to copy a file from one location to another, and replace the first line of text with a string. I almost have the script complete, but not quite there.. (see below)</p>
<pre><code># -- copy the ASCX file to the control templates
$fileName = "LandingUserControl.ascx"
$source = "D:\TfsProjects\LandingPag... | 19,680 | 97,686 | 2021-11-12 16:27:24 | 3,708,704 | 16 | 2010-09-14 12:08:32 | 323,582 | 2010-09-14 12:08:32 | https://stackoverflow.com/q/3708647 | https://stackoverflow.com/a/3708704 | <p>Not a one-liner but it works (replace test1.txt and test2.txt with your paths):</p>
<pre><code>.{
"<text to add>"
Get-Content test1.txt | Select-Object -Skip 1
} |
Set-Content test2.txt
</code></pre>
| <p>Not a one-liner but it works (replace test1.txt and test2.txt with your paths):</p> <pre><code>.{ "<text to add>" Get-Content test1.txt | Select-Object -Skip 1 } | Set-Content test2.txt </code></pre> | 526 | powershell | <h1>replace the first line of text from a file</h1>
<p>I would like to copy a file from one location to another, and replace the first line of text with a string. I almost have the script complete, but not quite there.. (see below)</p>
<pre><code># -- copy the ASCX file to the control templates
$fileName = "LandingUs... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,856 | bash | # replace the first line of text from a file
I would like to copy a file from one location to another, and replace the first line of text with a string. I almost have the script complete, but not quite there.. (see below)
```
# -- copy the ASCX file to the control templates
$fileName = "LandingUserControl.ascx"
$sour... | Not a one-liner but it works (replace test1.txt and test2.txt with your paths):
```
.{
"<text to add>"
Get-Content test1.txt | Select-Object -Skip 1
} |
Set-Content test2.txt
``` |
3589033 | exec line from file in bash | 11 | 2010-08-28 01:08:33 | <p>I'm trying to read commands from a text file and execute each line from a bash script.</p>
<pre><code>#!/bin/bash
while read line; do
$line
done < "commands.txt"
</code></pre>
<p>In some cases, if <code>$line</code> contains commands that are meant to run in background, eg <code>command 2>&1 &am... | 16,428 | 11,301 | 2017-09-09 15:36:06 | 3,589,092 | 16 | 2010-08-28 01:32:53 | 131,527 | 2010-08-28 01:32:53 | https://stackoverflow.com/q/3589033 | https://stackoverflow.com/a/3589092 | <p>if all your commands are inside "commands.txt", essentially, you can call it a shell script. That's why you can either source it, or run it like normal, ie chmod u+x , then you can execute it using <code>sh commands.txt</code></p>
| <p>if all your commands are inside "commands.txt", essentially, you can call it a shell script. That's why you can either source it, or run it like normal, ie chmod u+x , then you can execute it using <code>sh commands.txt</code></p> | 387 | bash | <h1>exec line from file in bash</h1>
<p>I'm trying to read commands from a text file and execute each line from a bash script.</p>
<pre><code>#!/bin/bash
while read line; do
$line
done < "commands.txt"
</code></pre>
<p>In some cases, if <code>$line</code> contains commands that are meant to run in backgro... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,857 | bash | # exec line from file in bash
I'm trying to read commands from a text file and execute each line from a bash script.
```
#!/bin/bash
while read line; do
$line
done < "commands.txt"
```
In some cases, if `$line` contains commands that are meant to run in background, eg `command 2>&1 &` they will not start in... | if all your commands are inside "commands.txt", essentially, you can call it a shell script. That's why you can either source it, or run it like normal, ie chmod u+x , then you can execute it using `sh commands.txt` |
1912328 | How to map Delete and End keys on tcsh shell? | 11 | 2009-12-16 04:39:53 | <p>I use tcsh , and when Delete/End is pressed on cmd line, it simply shows up as <code>~</code> ; I have to press <code><Ctrl><e></code> to go to end of line. Can anyone help me to be able to use Delete/End keys as their name suggests ?</p>
| 7,493 | 212,942 | 2009-12-16 05:45:11 | 1,912,527 | 16 | 2009-12-16 05:36:06 | 54,435 | 2009-12-16 05:36:06 | https://stackoverflow.com/q/1912328 | https://stackoverflow.com/a/1912527 | <p>Those keys already worked on my Debian system. I found these commands in the <code>/etc/csh.cshrc</code> file:</p>
<pre><code>if ($?tcsh && $?prompt) then
bindkey "\e[1~" beginning-of-line # Home
bindkey "\e[7~" beginning-of-line # Home rxvt
bindkey "\e[2~" overwrite-mode # Ins
... | <p>Those keys already worked on my Debian system. I found these commands in the <code>/etc/csh.cshrc</code> file:</p> <pre><code>if ($?tcsh && $?prompt) then bindkey "\e[1~" beginning-of-line # Home bindkey "\e[7~" beginning-of-line # Home rxvt bindkey "\e[2~" overwrite-mode # Ins ... | 267, 390, 8599 | keyboard, shell, tcsh | <h1>How to map Delete and End keys on tcsh shell?</h1>
<p>I use tcsh , and when Delete/End is pressed on cmd line, it simply shows up as <code>~</code> ; I have to press <code><Ctrl><e></code> to go to end of line. Can anyone help me to be able to use Delete/End keys as their name suggests ?</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,858 | bash | # How to map Delete and End keys on tcsh shell?
I use tcsh , and when Delete/End is pressed on cmd line, it simply shows up as `~` ; I have to press `<Ctrl><e>` to go to end of line. Can anyone help me to be able to use Delete/End keys as their name suggests ? | Those keys already worked on my Debian system. I found these commands in the `/etc/csh.cshrc` file:
```
if ($?tcsh && $?prompt) then
bindkey "\e[1~" beginning-of-line # Home
bindkey "\e[7~" beginning-of-line # Home rxvt
bindkey "\e[2~" overwrite-mode # Ins
bindkey "\e[3~" delete-char... |
1567112 | Convert Keith Hill's PowerShell Get-Clipboard and Set-Clipboard to a PSM1 script | 11 | 2009-10-14 15:32:31 | <p>I'd like to convert Keith Hill's C# implementation of Get-Clipboard and Set-Clipboard into pure PowerShell as a .PSM1 file.</p>
<p>Is there a way to spin up an STA thread in PowerShell as he does in his Cmdlet when working with the clipboard?</p>
<p><a href="http://keithhill.spaces.live.com/blog/cns!5A8D2641E0963A... | 8,159 | 3,957 | 2019-11-25 21:05:01 | 1,573,295 | 16 | 2009-10-15 15:54:21 | 183,178 | 2013-01-25 17:57:31 | https://stackoverflow.com/q/1567112 | https://stackoverflow.com/a/1573295 | <p>TextBox doesn't require -STA switch.</p>
<pre><code>function Get-ClipBoard {
Add-Type -AssemblyName System.Windows.Forms
$tb = New-Object System.Windows.Forms.TextBox
$tb.Multiline = $true
$tb.Paste()
$tb.Text
}
function Set-ClipBoard() {
Param(
[Parameter(ValueFromPipeline=$true)]
... | <p>TextBox doesn't require -STA switch.</p> <pre><code>function Get-ClipBoard { Add-Type -AssemblyName System.Windows.Forms $tb = New-Object System.Windows.Forms.TextBox $tb.Multiline = $true $tb.Paste() $tb.Text } function Set-ClipBoard() { Param( [Parameter(ValueFromPipeline=$true)] ... | 9, 526, 1381, 15878 | c#, multithreading, powershell, sta | <h1>Convert Keith Hill's PowerShell Get-Clipboard and Set-Clipboard to a PSM1 script</h1>
<p>I'd like to convert Keith Hill's C# implementation of Get-Clipboard and Set-Clipboard into pure PowerShell as a .PSM1 file.</p>
<p>Is there a way to spin up an STA thread in PowerShell as he does in his Cmdlet when working wit... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,859 | bash | # Convert Keith Hill's PowerShell Get-Clipboard and Set-Clipboard to a PSM1 script
I'd like to convert Keith Hill's C# implementation of Get-Clipboard and Set-Clipboard into pure PowerShell as a .PSM1 file.
Is there a way to spin up an STA thread in PowerShell as he does in his Cmdlet when working with the clipboard?... | TextBox doesn't require -STA switch.
```
function Get-ClipBoard {
Add-Type -AssemblyName System.Windows.Forms
$tb = New-Object System.Windows.Forms.TextBox
$tb.Multiline = $true
$tb.Paste()
$tb.Text
}
function Set-ClipBoard() {
Param(
[Parameter(ValueFromPipeline=$true)]
[string] ... |
49988312 | How do I create files with special characters in Linux? | 10 | 2018-04-23 19:09:41 | <p>I am using the <code>touch</code> command to try and create a file with the name <code>"\?$*'KwaMe'*$?\"</code> (quotation marks included as part of the file name). However when I type <code>touch "\?$*'KwaMe'*$?\"</code> in the Terminal, it doesn't give me the result I am expecting. How can I create this file?</p>
| 45,795 | 9,438,033 | 2023-02-19 11:14:23 | 49,988,431 | 16 | 2018-04-23 19:17:56 | 5,660,517 | 2021-01-26 17:52:53 | https://stackoverflow.com/q/49988312 | https://stackoverflow.com/a/49988431 | <p><strong>You need to <a href="http://tldp.org/LDP/Bash-Beginners-Guide/html/sect_03_03.html" rel="noreferrer">escape special characters</a> with the backslash symbol (<code>\</code>).</strong></p>
<hr />
<p>This command will create a file named <code>"\?$*'KwaMe'*$?\"</code>:</p>
<pre class="lang-sh prettyp... | <p><strong>You need to <a href="http://tldp.org/LDP/Bash-Beginners-Guide/html/sect_03_03.html" rel="noreferrer">escape special characters</a> with the backslash symbol (<code>\</code>).</strong></p> <hr /> <p>This command will create a file named <code>"\?$*'KwaMe'*$?\"</code>:</p> <pre class="lang-sh prettyp... | 58, 387, 390, 1062, 12725 | bash, filenames, linux, shell, special-characters | <h1>How do I create files with special characters in Linux?</h1>
<p>I am using the <code>touch</code> command to try and create a file with the name <code>"\?$*'KwaMe'*$?\"</code> (quotation marks included as part of the file name). However when I type <code>touch "\?$*'KwaMe'*$?\"</code> in the Terminal, it doesn't gi... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,860 | bash | # How do I create files with special characters in Linux?
I am using the `touch` command to try and create a file with the name `"\?$*'KwaMe'*$?\"` (quotation marks included as part of the file name). However when I type `touch "\?$*'KwaMe'*$?\"` in the Terminal, it doesn't give me the result I am expecting. How can I... | **You need to [escape special characters](http://tldp.org/LDP/Bash-Beginners-Guide/html/sect_03_03.html) with the backslash symbol (`\`).**
---
This command will create a file named `"\?$*'KwaMe'*$?\"`:
```
touch \"\\\?\$\*\'KwaMe\'\*\$\?\\\"
```
---
### Explanation
1. **Double your `\`**, like this: `\\`, so tha... |
49626250 | Flask Shell Commands not working | 10 | 2018-04-03 09:10:46 | <p>I'm new to python and flask and currently working on the <a href="https://blog.miguelgrinberg.com/post/the-flask-mega-tutorial-part-iv-database" rel="noreferrer">Flask Mega-Tutorial</a>, however: I'm stuck getting <code>flask shell</code> to recognize my custom symbols/commands. </p>
<p>When I try to access the mod... | 17,104 | 9,589,937 | 2018-11-01 06:01:52 | 49,801,351 | 16 | 2018-04-12 16:12:47 | 9,589,937 | 2018-04-12 16:12:47 | https://stackoverflow.com/q/49626250 | https://stackoverflow.com/a/49801351 | <p>Thanks a lot to <a href="https://stackoverflow.com/users/904393/miguel">Miguel</a>, the writer of the FLASK Mega Tutorial (<a href="https://blog.miguelgrinberg.com/post/the-flask-mega-tutorial-part-i-hello-world" rel="noreferrer">go check that out</a>) wo solved my problem!</p>
<p>As he pointed out in <a href="https... | <p>Thanks a lot to <a href="https://stackoverflow.com/users/904393/miguel">Miguel</a>, the writer of the FLASK Mega Tutorial (<a href="https://blog.miguelgrinberg.com/post/the-flask-mega-tutorial-part-i-hello-world" rel="noreferrer">go check that out</a>) wo solved my problem!</p> <p>As he pointed out in <a href="https... | 16, 390, 54712, 60010 | flask, python, python-3.x, shell | <h1>Flask Shell Commands not working</h1>
<p>I'm new to python and flask and currently working on the <a href="https://blog.miguelgrinberg.com/post/the-flask-mega-tutorial-part-iv-database" rel="noreferrer">Flask Mega-Tutorial</a>, however: I'm stuck getting <code>flask shell</code> to recognize my custom symbols/comma... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 8,861 | bash | # Flask Shell Commands not working
I'm new to python and flask and currently working on the [Flask Mega-Tutorial](https://blog.miguelgrinberg.com/post/the-flask-mega-tutorial-part-iv-database), however: I'm stuck getting `flask shell` to recognize my custom symbols/commands.
When I try to access the model `User` as a... | Thanks a lot to [Miguel](https://stackoverflow.com/users/904393/miguel), the writer of the FLASK Mega Tutorial ([go check that out](https://blog.miguelgrinberg.com/post/the-flask-mega-tutorial-part-i-hello-world)) wo solved my problem!
As he pointed out in [a comment below my question](https://stackoverflow.com/questi... |
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