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39329017 | how to build console command in spring boot web application using spring shell? | 15 | 2016-09-05 10:50:38 | <p>I have created restfull web application using spring boot web starter which works well. I am able to access it through urls. </p>
<p>But I have requirement to create console command which can compute and store some values at the backend. I want to be able to run console command manually or through bash script.</p>
... | 17,568 | 1,191,081 | 2018-08-16 20:03:06 | 39,329,520 | 12 | 2016-09-05 11:22:01 | 641,627 | 2018-08-16 20:03:06 | https://stackoverflow.com/q/39329017 | https://stackoverflow.com/a/39329520 | <p>Here's 2 options:</p>
<blockquote>
<p><strong>(1) Rest API called from the command line</strong></p>
</blockquote>
<p>You could create a Spring <code>@RestController</code>, which you then call from the command line ?</p>
<pre><code>curl -X POST -i -H "Content-type: application/json" -c cookies.txt -X POST http... | <p>Here's 2 options:</p> <blockquote> <p><strong>(1) Rest API called from the command line</strong></p> </blockquote> <p>You could create a Spring <code>@RestController</code>, which you then call from the command line ?</p> <pre><code>curl -X POST -i -H "Content-type: application/json" -c cookies.txt -X POST http... | 17, 1211, 95875, 104375, 111386 | java, spring, spring-boot, spring-shell, spring-web | <h1>how to build console command in spring boot web application using spring shell?</h1>
<p>I have created restfull web application using spring boot web starter which works well. I am able to access it through urls. </p>
<p>But I have requirement to create console command which can compute and store some values at th... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,672 | bash | # how to build console command in spring boot web application using spring shell?
I have created restfull web application using spring boot web starter which works well. I am able to access it through urls.
But I have requirement to create console command which can compute and store some values at the backend. I want... | Here's 2 options:
> **(1) Rest API called from the command line**
You could create a Spring `@RestController`, which you then call from the command line ?
```
curl -X POST -i -H "Content-type: application/json" -c cookies.txt -X POST http://hostname:8080/service -d '
{
"field":"value",
"field2":"... |
27607323 | PowerShell - How to use 'Start-Process' and rename the newly launched windowtitle | 15 | 2014-12-22 17:14:23 | <p>I am trying to use the PowerShell (version 2) <code>Start-Process</code> and rename the newly launched window title. I have the following snippet of code that works fine, it launches a new PowerShell window and tails logs (<code>$c</code> contains the log file to tail):-</p>
<pre class="lang-powershell prettyprin... | 16,399 | 2,977,451 | 2022-03-18 05:11:17 | 27,607,611 | 12 | 2014-12-22 17:32:15 | 702,944 | 2014-12-22 17:32:15 | https://stackoverflow.com/q/27607323 | https://stackoverflow.com/a/27607611 | <p>A "dirty" solution would be:</p>
<pre><code>start-process powershell.exe -argument "`$host.ui.RawUI.WindowTitle = 'New window title rename example text'; get-content -Path $c -wait"
</code></pre>
<p>I would recommend creating a script for you commands and use parameters for input.</p>
<p>Untitled2.ps1</p>
<pre><... | <p>A "dirty" solution would be:</p> <pre><code>start-process powershell.exe -argument "`$host.ui.RawUI.WindowTitle = 'New window title rename example text'; get-content -Path $c -wait" </code></pre> <p>I would recommend creating a script for you commands and use parameters for input.</p> <p>Untitled2.ps1</p> <pre><... | 526 | powershell | <h1>PowerShell - How to use 'Start-Process' and rename the newly launched windowtitle</h1>
<p>I am trying to use the PowerShell (version 2) <code>Start-Process</code> and rename the newly launched window title. I have the following snippet of code that works fine, it launches a new PowerShell window and tails logs (<co... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,673 | bash | # PowerShell - How to use 'Start-Process' and rename the newly launched windowtitle
I am trying to use the PowerShell (version 2) `Start-Process` and rename the newly launched window title. I have the following snippet of code that works fine, it launches a new PowerShell window and tails logs (`$c` contains the log f... | A "dirty" solution would be:
```
start-process powershell.exe -argument "`$host.ui.RawUI.WindowTitle = 'New window title rename example text'; get-content -Path $c -wait"
```
I would recommend creating a script for you commands and use parameters for input.
Untitled2.ps1
```
param($c)
$host.ui.RawUI.WindowTitle = '... |
27002192 | Bash "declare -A" does not work on macOS | 15 | 2014-11-18 19:16:40 | <p>My guess is that Bash is not updated on macOS. When googling update Bash macOS, I keep getting the bug fix patch. Anyway, I need to use associative arrays in macOS Bash where the command:</p>
<pre><code>declare -A
</code></pre>
<p>yields the error:</p>
<blockquote>
<p>-bash: declare: -A: invalid option<br>
de... | 8,777 | 1,103,966 | 2024-05-02 06:53:38 | 27,002,208 | 12 | 2014-11-18 19:17:41 | 258,523 | 2014-11-18 19:17:41 | https://stackoverflow.com/q/27002192 | https://stackoverflow.com/a/27002208 | <p><code>declare -A</code> (associative arrays) are a bash 4+ feature.</p>
<p>The OS X bash is likely 3.X.</p>
<p>I don't know that OS X has an official update for bash 4+.</p>
<p>brew/etc. might though.</p>
| <p><code>declare -A</code> (associative arrays) are a bash 4+ feature.</p> <p>The OS X bash is likely 3.X.</p> <p>I don't know that OS X has an official update for bash 4+.</p> <p>brew/etc. might though.</p> | 58, 369, 387, 2575 | associative-array, bash, linux, macos | <h1>Bash "declare -A" does not work on macOS</h1>
<p>My guess is that Bash is not updated on macOS. When googling update Bash macOS, I keep getting the bug fix patch. Anyway, I need to use associative arrays in macOS Bash where the command:</p>
<pre><code>declare -A
</code></pre>
<p>yields the error:</p>
<blockquote... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,674 | bash | # Bash "declare -A" does not work on macOS
My guess is that Bash is not updated on macOS. When googling update Bash macOS, I keep getting the bug fix patch. Anyway, I need to use associative arrays in macOS Bash where the command:
```
declare -A
```
yields the error:
> -bash: declare: -A: invalid option
> declare... | `declare -A` (associative arrays) are a bash 4+ feature.
The OS X bash is likely 3.X.
I don't know that OS X has an official update for bash 4+.
brew/etc. might though. |
23581519 | How to create a valid empty JSON array with PowerShell? | 15 | 2014-05-10 13:17:41 | <p>Converting arrays to JSON string in PowerShell couldn't be more simple:</p>
<pre><code>@(1,2,3) | ConvertTo-Json
</code></pre>
<p>Produces:</p>
<pre><code>[
1,
2,
3
]
</code></pre>
<p>However if the array is empty the result is an empty string:</p>
<pre><code>@() | ConvertTo-Json
</code></pre>
<p>R... | 13,359 | 1,269,946 | 2024-05-14 01:23:10 | 23,581,702 | 12 | 2014-05-10 13:35:15 | 570,689 | 2014-05-10 13:35:15 | https://stackoverflow.com/q/23581519 | https://stackoverflow.com/a/23581702 | <p>It works without pipelining</p>
<pre><code>PS C:\> ConvertTo-Json @()
[
]
</code></pre>
| <p>It works without pipelining</p> <pre><code>PS C:\> ConvertTo-Json @() [ ] </code></pre> | 114, 526, 1508 | arrays, json, powershell | <h1>How to create a valid empty JSON array with PowerShell?</h1>
<p>Converting arrays to JSON string in PowerShell couldn't be more simple:</p>
<pre><code>@(1,2,3) | ConvertTo-Json
</code></pre>
<p>Produces:</p>
<pre><code>[
1,
2,
3
]
</code></pre>
<p>However if the array is empty the result is an empty... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,675 | bash | # How to create a valid empty JSON array with PowerShell?
Converting arrays to JSON string in PowerShell couldn't be more simple:
```
@(1,2,3) | ConvertTo-Json
```
Produces:
```
[
1,
2,
3
]
```
However if the array is empty the result is an empty string:
```
@() | ConvertTo-Json
```
Results an empty ... | It works without pipelining
```
PS C:\> ConvertTo-Json @()
[
]
``` |
17731345 | How to terminate variable expansion to create a string in Powershell | 15 | 2013-07-18 18:34:25 | <p>How do I tell powershell the end of a variable to be expanded into a string when it sits next to other alphabetic characters?</p>
<p>$StringToAdd = "iss"<br>
$CompeteString = "Miss$StringToAddippi"</p>
<p>Thanks!</p>
| 4,654 | 1,008,452 | 2013-11-30 21:42:58 | 17,731,393 | 12 | 2013-07-18 18:38:06 | 509,839 | 2013-07-18 18:44:08 | https://stackoverflow.com/q/17731345 | https://stackoverflow.com/a/17731393 | <p>Use curly braces, <code>{</code> and <code>}</code>, to delimit the variable expansion. For example:</p>
<pre><code>PS C:\> $StringToAdd = "iss"
PS C:\> $CompeteString = "Miss${StringToAdd}ippi"
PS C:\> $CompeteString
Mississippi
</code></pre>
| <p>Use curly braces, <code>{</code> and <code>}</code>, to delimit the variable expansion. For example:</p> <pre><code>PS C:\> $StringToAdd = "iss" PS C:\> $CompeteString = "Miss${StringToAdd}ippi" PS C:\> $CompeteString Mississippi </code></pre> | 526 | powershell | <h1>How to terminate variable expansion to create a string in Powershell</h1>
<p>How do I tell powershell the end of a variable to be expanded into a string when it sits next to other alphabetic characters?</p>
<p>$StringToAdd = "iss"<br>
$CompeteString = "Miss$StringToAddippi"</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 | 10,676 | bash | # How to terminate variable expansion to create a string in Powershell
How do I tell powershell the end of a variable to be expanded into a string when it sits next to other alphabetic characters?
$StringToAdd = "iss"
$CompeteString = "Miss$StringToAddippi"
Thanks! | Use curly braces, `{` and `}`, to delimit the variable expansion. For example:
```
PS C:\> $StringToAdd = "iss"
PS C:\> $CompeteString = "Miss${StringToAdd}ippi"
PS C:\> $CompeteString
Mississippi
``` |
13755082 | How do I install PSCX Powershell module? | 15 | 2012-12-07 00:27:38 | <p>I'm running Windows 7 with PowerShell 2 installed.</p>
<p>I've downloaded version 2.1 from here - <a href="http://pscx.codeplex.com/releases" rel="noreferrer">http://pscx.codeplex.com/releases</a></p>
<p>The Release notes say </p>
<ul>
<li>unblock the zip file - {which I did}</li>
<li>extract the contents of the ... | 23,209 | 6,268 | 2021-07-27 20:34:55 | 13,755,218 | 12 | 2012-12-07 00:42:32 | 6,268 | 2012-12-07 00:42:32 | https://stackoverflow.com/q/13755082 | https://stackoverflow.com/a/13755218 | <p>I hadn't actually completed the last step of my above question completely which turned out to be the answer.</p>
<p>Here is that answer for completeness</p>
<ul>
<li>Unblock the zip file you have downloaded</li>
<li>extract the zip file - this will likely give a folder structure of <code>Pscx-2.1.0/Pscx-2.1.0/{lot... | <p>I hadn't actually completed the last step of my above question completely which turned out to be the answer.</p> <p>Here is that answer for completeness</p> <ul> <li>Unblock the zip file you have downloaded</li> <li>extract the zip file - this will likely give a folder structure of <code>Pscx-2.1.0/Pscx-2.1.0/{lot... | 526, 24067 | powershell, powershell-2.0 | <h1>How do I install PSCX Powershell module?</h1>
<p>I'm running Windows 7 with PowerShell 2 installed.</p>
<p>I've downloaded version 2.1 from here - <a href="http://pscx.codeplex.com/releases" rel="noreferrer">http://pscx.codeplex.com/releases</a></p>
<p>The Release notes say </p>
<ul>
<li>unblock the zip file - {... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,677 | bash | # How do I install PSCX Powershell module?
I'm running Windows 7 with PowerShell 2 installed.
I've downloaded version 2.1 from here - <http://pscx.codeplex.com/releases>
The Release notes say
- unblock the zip file - {which I did}
- extract the contents of the ZIP file to your $env:Home\Documents\WindowsPowerShell\... | I hadn't actually completed the last step of my above question completely which turned out to be the answer.
Here is that answer for completeness
- Unblock the zip file you have downloaded
- extract the zip file - this will likely give a folder structure of `Pscx-2.1.0/Pscx-2.1.0/{lots of files}`
- rename the child f... |
13672420 | Using bash process substitution for a sudo command | 15 | 2012-12-02 18:35:43 | <p>I would like to use bash process substitution for a sudo command.</p>
<p>For example, here's a non-sudo command that works for me:</p>
<pre><code>$ cat <(echo "installed.txt")
installed.txt
</code></pre>
<p>And here's a sudo version of the command that does not work:</p>
<pre><code>$ sudo cat <(echo "insta... | 4,223 | 822,162 | 2021-07-23 19:39:43 | 13,672,556 | 12 | 2012-12-02 18:52:00 | 465,183 | 2012-12-02 18:52:00 | https://stackoverflow.com/q/13672420 | https://stackoverflow.com/a/13672556 | <p>Try doing this in your shell :</p>
<pre><code>$ sudo bash -c 'cat <(echo "installed.txt for UID=$UID")'
installed.txt for UID=0
</code></pre>
| <p>Try doing this in your shell :</p> <pre><code>$ sudo bash -c 'cat <(echo "installed.txt for UID=$UID")' installed.txt for UID=0 </code></pre> | 387 | bash | <h1>Using bash process substitution for a sudo command</h1>
<p>I would like to use bash process substitution for a sudo command.</p>
<p>For example, here's a non-sudo command that works for me:</p>
<pre><code>$ cat <(echo "installed.txt")
installed.txt
</code></pre>
<p>And here's a sudo version of the command tha... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,678 | bash | # Using bash process substitution for a sudo command
I would like to use bash process substitution for a sudo command.
For example, here's a non-sudo command that works for me:
```
$ cat <(echo "installed.txt")
installed.txt
```
And here's a sudo version of the command that does not work:
```
$ sudo cat <(echo "in... | Try doing this in your shell :
```
$ sudo bash -c 'cat <(echo "installed.txt for UID=$UID")'
installed.txt for UID=0
``` |
6595129 | Delete positional parameters in Bash? | 15 | 2011-07-06 10:45:41 | <p>You can skip positional parameters with <code>shift</code> but can you delete positional parameters by passing the position?</p>
<pre><code>x(){ CODE; echo "$@"; }; x 1 2 3 4 5 6 7 8
> 1 2 4 5 6 7 8
</code></pre>
<p>I would like to add CODE to <code>x()</code> to delete positional parameter 3. I don't want to d... | 14,293 | 827,886 | 2018-02-10 11:07:16 | 6,595,442 | 12 | 2011-07-06 11:11:09 | 96,588 | 2011-07-06 11:16:21 | https://stackoverflow.com/q/6595129 | https://stackoverflow.com/a/6595442 | <p>The best way, if you want to be able to pass on the parameters to another process, or handle space separated parameters, is to re-<code>set</code> the parameters:</p>
<pre><code>$ x(){ echo "Parameter count before: $#"; set -- "${@:1:2}" "${@:4:8}"; echo "$@"; echo "Parameter count after: $#"; }
$ x 1 2 3 4 5 6 7 8... | <p>The best way, if you want to be able to pass on the parameters to another process, or handle space separated parameters, is to re-<code>set</code> the parameters:</p> <pre><code>$ x(){ echo "Parameter count before: $#"; set -- "${@:1:2}" "${@:4:8}"; echo "$@"; echo "Parameter count after: $#"; } $ x 1 2 3 4 5 6 7 8... | 360, 387, 390 | bash, parameters, shell | <h1>Delete positional parameters in Bash?</h1>
<p>You can skip positional parameters with <code>shift</code> but can you delete positional parameters by passing the position?</p>
<pre><code>x(){ CODE; echo "$@"; }; x 1 2 3 4 5 6 7 8
> 1 2 4 5 6 7 8
</code></pre>
<p>I would like to add CODE to <code>x()</code> to d... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,679 | bash | # Delete positional parameters in Bash?
You can skip positional parameters with `shift` but can you delete positional parameters by passing the position?
```
x(){ CODE; echo "$@"; }; x 1 2 3 4 5 6 7 8
> 1 2 4 5 6 7 8
```
I would like to add CODE to `x()` to delete positional parameter 3. I don't want to do `echo "${... | The best way, if you want to be able to pass on the parameters to another process, or handle space separated parameters, is to re-`set` the parameters:
```
$ x(){ echo "Parameter count before: $#"; set -- "${@:1:2}" "${@:4:8}"; echo "$@"; echo "Parameter count after: $#"; }
$ x 1 2 3 4 5 6 7 8
Parameter count before: ... |
5665169 | Looping through directories in Bash | 15 | 2011-04-14 14:57:11 | <p>I require the script to <code>cd</code> to a directory, then delete all but a few files in sub-directories—but leave the folders alone. Would it help to use <code>switch</code>/<code>case</code>s for each file I need to preserve?</p>
<p>Ideally, I think it should keep searching for further sub-dirs, instead of me ... | 46,999 | 706,380 | 2018-05-08 16:43:04 | 5,665,578 | 12 | 2011-04-14 15:25:01 | 459,745 | 2013-07-03 13:49:39 | https://stackoverflow.com/q/5665169 | https://stackoverflow.com/a/5665578 | <p>How about this?</p>
<pre class="lang-sh prettyprint-override"><code>$ find /Users/YourName/Desktop/Test -type f -maxdepth 2 -not -name watch.log -delete
</code></pre>
<p><br></p>
<h2>Explanation</h2>
<ul>
<li><code>-type</code>: look for files only</li>
<li><code>-maxdepth</code>: go down two levels at most</li>... | <p>How about this?</p> <pre class="lang-sh prettyprint-override"><code>$ find /Users/YourName/Desktop/Test -type f -maxdepth 2 -not -name watch.log -delete </code></pre> <p><br></p> <h2>Explanation</h2> <ul> <li><code>-type</code>: look for files only</li> <li><code>-maxdepth</code>: go down two levels at most</li>... | 387, 531, 2314 | bash, loops, scripting | <h1>Looping through directories in Bash</h1>
<p>I require the script to <code>cd</code> to a directory, then delete all but a few files in sub-directories—but leave the folders alone. Would it help to use <code>switch</code>/<code>case</code>s for each file I need to preserve?</p>
<p>Ideally, I think it should keep s... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,680 | bash | # Looping through directories in Bash
I require the script to `cd` to a directory, then delete all but a few files in sub-directories—but leave the folders alone. Would it help to use `switch`/`case`s for each file I need to preserve?
Ideally, I think it should keep searching for further sub-dirs, instead of me havin... | How about this?
```
$ find /Users/YourName/Desktop/Test -type f -maxdepth 2 -not -name watch.log -delete
```
## Explanation
- `-type`: look for files only
- `-maxdepth`: go down two levels at most
- `-not -name` (combo): exclude `watch.log` from the search
- `-delete`: deletes files
## Recommendation
Try out the a... |
4453177 | How to use TFS PowerShell to get list of changesets and associated work items? | 15 | 2010-12-15 17:50:52 | <p>I'm a novice with the PowerShell and TFS cmdlets and I'm trying to retrieve a list of changesets in an area path, and their associated work items.</p>
<p>I've got as far as listing changesets since a certain date:</p>
<pre><code>Get-TfsItemHistory "$/Project/Branch" -Version “D01/12/10~” -Recurse
</code></pre>
<... | 17,235 | 370,692 | 2015-05-05 12:03:03 | 4,453,417 | 12 | 2010-12-15 18:18:13 | 153,982 | 2010-12-15 18:18:13 | https://stackoverflow.com/q/4453177 | https://stackoverflow.com/a/4453417 | <p>Yes, you're on the right track. Try this as a way to view workitems associated with a changeset:</p>
<pre><code>Get-TfsItemHistory "$/Project/Branch" -Version "D01/12/10~" -Recurse |
Select ChangesetId -exp WorkItems |
Format-Table Id,Title -GroupBy ChangesetId -Auto
</code></pre>
| <p>Yes, you're on the right track. Try this as a way to view workitems associated with a changeset:</p> <pre><code>Get-TfsItemHistory "$/Project/Branch" -Version "D01/12/10~" -Recurse | Select ChangesetId -exp WorkItems | Format-Table Id,Title -GroupBy ChangesetId -Auto </code></pre> | 526, 733 | powershell, tfs | <h1>How to use TFS PowerShell to get list of changesets and associated work items?</h1>
<p>I'm a novice with the PowerShell and TFS cmdlets and I'm trying to retrieve a list of changesets in an area path, and their associated work items.</p>
<p>I've got as far as listing changesets since a certain date:</p>
<pre><cod... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,681 | bash | # How to use TFS PowerShell to get list of changesets and associated work items?
I'm a novice with the PowerShell and TFS cmdlets and I'm trying to retrieve a list of changesets in an area path, and their associated work items.
I've got as far as listing changesets since a certain date:
```
Get-TfsItemHistory "$/Pro... | Yes, you're on the right track. Try this as a way to view workitems associated with a changeset:
```
Get-TfsItemHistory "$/Project/Branch" -Version "D01/12/10~" -Recurse |
Select ChangesetId -exp WorkItems |
Format-Table Id,Title -GroupBy ChangesetId -Auto
``` |
4434797 | Read a config file in BASH without using "source" | 15 | 2010-12-14 00:24:14 | <p>I'm attempting to read a config file that is formatted as follows:</p>
<pre><code>USER = username
TARGET = arrows
</code></pre>
<p>I realize that if I got rid of the spaces, I could simply source the config file, but for security reasons I'm trying to avoid that. I know there is a way to read the config file line... | 19,419 | 541,289 | 2019-02-28 20:53:55 | 4,434,843 | 12 | 2010-12-14 00:34:13 | 207,248 | 2013-06-06 09:27:41 | https://stackoverflow.com/q/4434797 | https://stackoverflow.com/a/4434843 | <p>The following script iterates over each line in your input file (<em>vars</em> in my case) and does a pattern match against <code>=</code>. If the equal sign is found it will use <a href="http://www.network-theory.co.uk/docs/bashref/ShellParameterExpansion.html">Parameter Expansion</a> to parse out the variable <em>... | <p>The following script iterates over each line in your input file (<em>vars</em> in my case) and does a pattern match against <code>=</code>. If the equal sign is found it will use <a href="http://www.network-theory.co.uk/docs/bashref/ShellParameterExpansion.html">Parameter Expansion</a> to parse out the variable <em>... | 387, 1271, 3574, 4413 | bash, config, eval, grep | <h1>Read a config file in BASH without using "source"</h1>
<p>I'm attempting to read a config file that is formatted as follows:</p>
<pre><code>USER = username
TARGET = arrows
</code></pre>
<p>I realize that if I got rid of the spaces, I could simply source the config file, but for security reasons I'm trying to avoi... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,682 | bash | # Read a config file in BASH without using "source"
I'm attempting to read a config file that is formatted as follows:
```
USER = username
TARGET = arrows
```
I realize that if I got rid of the spaces, I could simply source the config file, but for security reasons I'm trying to avoid that. I know there is a way to ... | The following script iterates over each line in your input file (*vars* in my case) and does a pattern match against `=`. If the equal sign is found it will use [Parameter Expansion](http://www.network-theory.co.uk/docs/bashref/ShellParameterExpansion.html) to parse out the variable *name* from the *value*. It then sto... |
1132135 | Is Perl faster than bash? | 15 | 2009-07-15 15:27:52 | <p>I have a bash script that cuts out a section of a logfile between 2 timestamps, but because of the size of the files, it takes quite a while to run.</p>
<p>If I were to rewrite the script in Perl, could I achieve a significant speed increase - or would I have to move to something like C to accomplish this?</p>
<pr... | 20,386 | 3,764 | 2009-09-23 13:41:45 | 1,132,279 | 12 | 2009-07-15 15:51:18 | 100,754 | 2009-07-15 23:09:56 | https://stackoverflow.com/q/1132135 | https://stackoverflow.com/a/1132279 | <p><strong>Updated script based on Brent's comment:</strong> This one is untested.</p>
<pre><code>#!/usr/bin/perl
use strict;
use warnings;
my %months = (
jan => 1, feb => 2, mar => 3, apr => 4,
may => 5, jun => 6, jul => 7, aug => 8,
sep => 9, oct => 10, nov => 11, d... | <p><strong>Updated script based on Brent's comment:</strong> This one is untested.</p> <pre><code>#!/usr/bin/perl use strict; use warnings; my %months = ( jan => 1, feb => 2, mar => 3, apr => 4, may => 5, jun => 6, jul => 7, aug => 8, sep => 9, oct => 10, nov => 11, d... | 387, 543, 580, 588, 598 | bash, comparison, optimization, performance, perl | <h1>Is Perl faster than bash?</h1>
<p>I have a bash script that cuts out a section of a logfile between 2 timestamps, but because of the size of the files, it takes quite a while to run.</p>
<p>If I were to rewrite the script in Perl, could I achieve a significant speed increase - or would I have to move to something ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,683 | bash | # Is Perl faster than bash?
I have a bash script that cuts out a section of a logfile between 2 timestamps, but because of the size of the files, it takes quite a while to run.
If I were to rewrite the script in Perl, could I achieve a significant speed increase - or would I have to move to something like C to accomp... | **Updated script based on Brent's comment:** This one is untested.
```
#!/usr/bin/perl
use strict;
use warnings;
my %months = (
jan => 1, feb => 2, mar => 3, apr => 4,
may => 5, jun => 6, jul => 7, aug => 8,
sep => 9, oct => 10, nov => 11, dec => 12,
);
while ( my $line = <> ) {
my $ts = substr ... |
73939916 | How to upgrade PowerShell version | 14 | 2022-10-03 19:22:59 | <p>Lately, firing up PowerShell, I noticed that there is a phrase that says:</p>
<blockquote>
<p>Install the latest PowerShell for new features and improvements!
<a href="https://aka.ms/PSWindows" rel="noreferrer">https://aka.ms/PSWindows</a></p>
</blockquote>
<p>So why not trying it following the actual Microsoft docu... | 42,234 | 4,652,358 | 2024-06-21 18:45:51 | 73,940,006 | 12 | 2022-10-03 19:31:23 | 12,251,609 | 2022-10-03 19:31:23 | https://stackoverflow.com/q/73939916 | https://stackoverflow.com/a/73940006 | <p>Powershell 7 (core) is its own application. Search for <code>pwsh.exe</code> and run that</p>
| <p>Powershell 7 (core) is its own application. Search for <code>pwsh.exe</code> and run that</p> | 64, 526, 108010, 144089 | powershell, powershell-5.0, powershell-7.0, windows | <h1>How to upgrade PowerShell version</h1>
<p>Lately, firing up PowerShell, I noticed that there is a phrase that says:</p>
<blockquote>
<p>Install the latest PowerShell for new features and improvements!
<a href="https://aka.ms/PSWindows" rel="noreferrer">https://aka.ms/PSWindows</a></p>
</blockquote>
<p>So why not tr... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,684 | bash | # How to upgrade PowerShell version
Lately, firing up PowerShell, I noticed that there is a phrase that says:
> Install the latest PowerShell for new features and improvements!
> <https://aka.ms/PSWindows>
So why not trying it following the actual Microsoft documentation:
1. I run `$PSVersionTable` and the version ... | Powershell 7 (core) is its own application. Search for `pwsh.exe` and run that |
38082179 | How to translate a Windows path for Windows Subsystem for Linux | 14 | 2016-06-28 17:00:52 | <p>I'm looking for a way to translate Win32 paths into POSIX paths, preferably using Win32 tools.</p>
<p><strong>Background</strong></p>
<p>The latest Windows 10 Insider Build introduced the Windows Subsystem for Linux (WSL) including a native <code>bash</code> provided by Canonical, the company behind Ubuntu. Their im... | 10,983 | 1,329,116 | 2022-03-23 09:15:47 | 69,510,047 | 12 | 2021-10-09 19:41:56 | 15,964,568 | 2022-03-23 09:15:47 | https://stackoverflow.com/q/38082179 | https://stackoverflow.com/a/69510047 | <p>The <a href="https://github.com/wslutilities/wslu" rel="noreferrer">WSL Utilities</a> package now provides this capability via the <code>wslpath</code> command.</p>
<p>WSLU is installed by default with the Ubuntu distribution, but may need to be added manually to other distributions. Instructions for package instal... | <p>The <a href="https://github.com/wslutilities/wslu" rel="noreferrer">WSL Utilities</a> package now provides this capability via the <code>wslpath</code> command.</p> <p>WSLU is installed by default with the Ubuntu distribution, but may need to be added manually to other distributions. Instructions for package instal... | 387, 107329, 119526 | bash, windows-10, windows-subsystem-for-linux | <h1>How to translate a Windows path for Windows Subsystem for Linux</h1>
<p>I'm looking for a way to translate Win32 paths into POSIX paths, preferably using Win32 tools.</p>
<p><strong>Background</strong></p>
<p>The latest Windows 10 Insider Build introduced the Windows Subsystem for Linux (WSL) including a native <co... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,685 | bash | # How to translate a Windows path for Windows Subsystem for Linux
I'm looking for a way to translate Win32 paths into POSIX paths, preferably using Win32 tools.
**Background**
The latest Windows 10 Insider Build introduced the Windows Subsystem for Linux (WSL) including a native `bash` provided by Canonical, the com... | The [WSL Utilities](https://github.com/wslutilities/wslu) package now provides this capability via the `wslpath` command.
WSLU is installed by default with the Ubuntu distribution, but may need to be added manually to other distributions. Instructions for package installation are on the Github page linked above.
Exam... |
39898824 | What does |% mean in PowerShell | 14 | 2016-10-06 14:34:50 | <p>I've come across this today:</p>
<pre><code>$tests = (Get-ChildItem . -Recurse -Name bin |% { Get-ChildItem $_ -Recurse -Filter *.Unit.Tests.dll } |% { $($_.FullName) })
Write-Host ------------- TESTS -----------
Write-Host $tests
Write-Host -------------------------------
.\tools\xunit\xunit.console.exe $tests -x... | 20,970 | 4,572,605 | 2019-03-06 16:29:36 | 39,898,932 | 12 | 2016-10-06 14:39:22 | 3,905,079 | 2016-10-06 14:39:22 | https://stackoverflow.com/q/39898824 | https://stackoverflow.com/a/39898932 | <p><code>%</code> is an <a href="https://technet.microsoft.com/en-us/library/hh847830.aspx" rel="noreferrer">alias</a> for <a href="https://technet.microsoft.com/en-us/library/hh849731.aspx" rel="noreferrer">the <code>ForEach-Object</code> cmdlet</a>.</p>
<p>An alias is just another name by which you can reference a c... | <p><code>%</code> is an <a href="https://technet.microsoft.com/en-us/library/hh847830.aspx" rel="noreferrer">alias</a> for <a href="https://technet.microsoft.com/en-us/library/hh849731.aspx" rel="noreferrer">the <code>ForEach-Object</code> cmdlet</a>.</p> <p>An alias is just another name by which you can reference a c... | 526 | powershell | <h1>What does |% mean in PowerShell</h1>
<p>I've come across this today:</p>
<pre><code>$tests = (Get-ChildItem . -Recurse -Name bin |% { Get-ChildItem $_ -Recurse -Filter *.Unit.Tests.dll } |% { $($_.FullName) })
Write-Host ------------- TESTS -----------
Write-Host $tests
Write-Host -------------------------------
... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,686 | bash | # What does |% mean in PowerShell
I've come across this today:
```
$tests = (Get-ChildItem . -Recurse -Name bin |% { Get-ChildItem $_ -Recurse -Filter *.Unit.Tests.dll } |% { $($_.FullName) })
Write-Host ------------- TESTS -----------
Write-Host $tests
Write-Host -------------------------------
.\tools\xunit\xunit.... | `%` is an [alias](https://technet.microsoft.com/en-us/library/hh847830.aspx) for [the `ForEach-Object` cmdlet](https://technet.microsoft.com/en-us/library/hh849731.aspx).
An alias is just another name by which you can reference a cmdlet or function. For example `dir`, `ls`, and `gci` are all aliases for `Get-ChildItem... |
22812853 | SSH to server, Sudo su - then run commands in bash | 14 | 2014-04-02 13:21:00 | <p>I have the following </p>
<pre><code>#!/bin/bash
USER='scott'
PASS='tiger'
ssh -t $USER@server006.web.com "sudo su - http"
</code></pre>
<p>This Works, but I was trying to get it to run a script afterwards, and if I do, using -c or <
<p>The script does a grep like this:</p>
<pre><code>grep -i "Exception:" ... | 38,312 | 1,053,904 | 2014-04-02 15:25:58 | 22,813,198 | 12 | 2014-04-02 13:35:04 | 3,489,298 | 2014-04-02 13:35:04 | https://stackoverflow.com/q/22812853 | https://stackoverflow.com/a/22813198 | <p>Try</p>
<pre><code>ssh -t $USER@server006.web.com 'sudo -u http grep -i "Exception:" /opt/local/server/logs/exceptions.log | grep -e "|*-*-*:*:*,*|" | tail -1 | awk -F"|" "{print $2}" >> log.log'
</code></pre>
<p>Sudo already runs the command as a different user to there's no need to su again.</p>
<p>Only r... | <p>Try</p> <pre><code>ssh -t $USER@server006.web.com 'sudo -u http grep -i "Exception:" /opt/local/server/logs/exceptions.log | grep -e "|*-*-*:*:*,*|" | tail -1 | awk -F"|" "{print $2}" >> log.log' </code></pre> <p>Sudo already runs the command as a different user to there's no need to su again.</p> <p>Only r... | 386, 387, 390, 989, 1674 | aix, bash, shell, ssh, sudo | <h1>SSH to server, Sudo su - then run commands in bash</h1>
<p>I have the following </p>
<pre><code>#!/bin/bash
USER='scott'
PASS='tiger'
ssh -t $USER@server006.web.com "sudo su - http"
</code></pre>
<p>This Works, but I was trying to get it to run a script afterwards, and if I do, using -c or <
<p>The script ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,687 | bash | # SSH to server, Sudo su - then run commands in bash
I have the following
```
#!/bin/bash
USER='scott'
PASS='tiger'
ssh -t $USER@server006.web.com "sudo su - http"
```
This Works, but I was trying to get it to run a script afterwards, and if I do, using -c or <
The script does a grep like this:
```
grep -i "Exce... | Try
```
ssh -t $USER@server006.web.com 'sudo -u http grep -i "Exception:" /opt/local/server/logs/exceptions.log | grep -e "|*-*-*:*:*,*|" | tail -1 | awk -F"|" "{print $2}" >> log.log'
```
Sudo already runs the command as a different user to there's no need to su again.
Only reason to do sudo su is to have a fast wa... |
19029850 | PowerShell release COM object | 14 | 2013-09-26 13:35:46 | <p>I have a small utility function in one PowerShell script:</p>
<pre><code>function Unzip-File{
param(
[Parameter(Mandatory=$true)]
[string]$ZipFile,
[Parameter(Mandatory=$true)]
[string]$Path
)
$shell=New-Object -ComObject shell.application
$zip = $shell.namespace($Z... | 17,984 | 588,868 | 2018-10-01 18:43:01 | 19,030,001 | 12 | 2013-09-26 13:43:23 | 520,612 | 2013-12-15 13:12:51 | https://stackoverflow.com/q/19029850 | https://stackoverflow.com/a/19030001 | <p>Usually I use this function:</p>
<pre><code>function Release-Ref ($ref) {
[System.Runtime.InteropServices.Marshal]::ReleaseComObject([System.__ComObject]$ref) | out-null
[System.GC]::Collect()
[System.GC]::WaitForPendingFinalizers()
}
</code></pre>
<p>because I've noted that my comobject always stay alive, I thi... | <p>Usually I use this function:</p> <pre><code>function Release-Ref ($ref) { [System.Runtime.InteropServices.Marshal]::ReleaseComObject([System.__ComObject]$ref) | out-null [System.GC]::Collect() [System.GC]::WaitForPendingFinalizers() } </code></pre> <p>because I've noted that my comobject always stay alive, I thi... | 526 | powershell | <h1>PowerShell release COM object</h1>
<p>I have a small utility function in one PowerShell script:</p>
<pre><code>function Unzip-File{
param(
[Parameter(Mandatory=$true)]
[string]$ZipFile,
[Parameter(Mandatory=$true)]
[string]$Path
)
$shell=New-Object -ComObject shell.appl... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,688 | bash | # PowerShell release COM object
I have a small utility function in one PowerShell script:
```
function Unzip-File{
param(
[Parameter(Mandatory=$true)]
[string]$ZipFile,
[Parameter(Mandatory=$true)]
[string]$Path
)
$shell=New-Object -ComObject shell.application
$zip = ... | Usually I use this function:
```
function Release-Ref ($ref) {
[System.Runtime.InteropServices.Marshal]::ReleaseComObject([System.__ComObject]$ref) | out-null
[System.GC]::Collect()
[System.GC]::WaitForPendingFinalizers()
}
```
because I've noted that my comobject always stay alive, I think Powershell 2.0 is not ab... |
6502836 | Interactive search and replace from shell | 14 | 2011-06-28 07:06:56 | <p>Search and replace over multiple files is difficult in my editor. There are plenty of tricks that can be done with <code>find</code>, <code>xargs</code> and <code>sed</code>/<code>awk</code> incluing search-and replace in multiple files. But somehow I couldn't find a way to make this interactive. Do you know a way t... | 5,559 | 61,342 | 2019-03-22 11:50:54 | 13,513,811 | 12 | 2012-11-22 13:32:27 | 1,820,630 | 2013-06-26 12:49:38 | https://stackoverflow.com/q/6502836 | https://stackoverflow.com/a/13513811 | <p>KISS principle:</p>
<pre><code>vim
:args `ls`
:argdo %s#SEARCH#REPLACE#gec |update
</code></pre>
<p>First character afer %s is used as separator</p>
| <p>KISS principle:</p> <pre><code>vim :args `ls` :argdo %s#SEARCH#REPLACE#gec |update </code></pre> <p>First character afer %s is used as separator</p> | 390, 2498, 10193 | find, replace, shell | <h1>Interactive search and replace from shell</h1>
<p>Search and replace over multiple files is difficult in my editor. There are plenty of tricks that can be done with <code>find</code>, <code>xargs</code> and <code>sed</code>/<code>awk</code> incluing search-and replace in multiple files. But somehow I couldn't find ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,689 | bash | # Interactive search and replace from shell
Search and replace over multiple files is difficult in my editor. There are plenty of tricks that can be done with `find`, `xargs` and `sed`/`awk` incluing search-and replace in multiple files. But somehow I couldn't find a way to make this interactive. Do you know a way to ... | KISS principle:
```
vim
:args `ls`
:argdo %s#SEARCH#REPLACE#gec |update
```
First character afer %s is used as separator |
6185994 | Unix find: list of files from stdin | 14 | 2011-05-31 10:07:49 | <p>I'm working in Linux & bash (or Cygwin & bash).</p>
<p>I have a huge--<em>huge</em>--directory structure, and I have to find a few needles in the haystack.</p>
<p>Specifically, I'm looking for these files (20 or so):</p>
<pre><code>foo.c
bar.h
...
quux.txt
</code></pre>
<p>I know that they are in a subdi... | 16,302 | 15,456 | 2011-05-31 13:25:52 | 6,186,687 | 12 | 2011-05-31 11:10:48 | 632,407 | 2011-05-31 11:16:32 | https://stackoverflow.com/q/6185994 | https://stackoverflow.com/a/6186687 | <p>If your directory structure is huge but not changing frequently, it is good to run</p>
<pre><code>cd /to/root/of/the/files
find . -type f -print > ../LIST_OF_FILES.txt #and sometimes handy the next one too
find . -type d -print > ../LIST_OF_DIRS.txt
</code></pre>
<p>after it you can really FAST find anything... | <p>If your directory structure is huge but not changing frequently, it is good to run</p> <pre><code>cd /to/root/of/the/files find . -type f -print > ../LIST_OF_FILES.txt #and sometimes handy the next one too find . -type d -print > ../LIST_OF_DIRS.txt </code></pre> <p>after it you can really FAST find anything... | 34, 387, 10193 | bash, find, unix | <h1>Unix find: list of files from stdin</h1>
<p>I'm working in Linux & bash (or Cygwin & bash).</p>
<p>I have a huge--<em>huge</em>--directory structure, and I have to find a few needles in the haystack.</p>
<p>Specifically, I'm looking for these files (20 or so):</p>
<pre><code>foo.c
bar.h
...
quux.txt
</co... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,690 | bash | # Unix find: list of files from stdin
I'm working in Linux & bash (or Cygwin & bash).
I have a huge--*huge*--directory structure, and I have to find a few needles in the haystack.
Specifically, I'm looking for these files (20 or so):
```
foo.c
bar.h
...
quux.txt
```
I know that they are in a subdirectory somewhere... | If your directory structure is huge but not changing frequently, it is good to run
```
cd /to/root/of/the/files
find . -type f -print > ../LIST_OF_FILES.txt #and sometimes handy the next one too
find . -type d -print > ../LIST_OF_DIRS.txt
```
after it you can really FAST find anything (with grep, sed, etc..) and upda... |
5038803 | Function local read-only vs. global read-only variable with the same name | 14 | 2011-02-18 07:45:18 | <p>I get a suprising behaviour when I have a function local read-only variable and global read-only variable with the same name.</p>
<p>When read-only option is removed from global declaration. I.e.</p>
<pre><code>declare -r var="main"
</code></pre>
<p>is changed to:</p>
<pre><code>declare var="main"
</code></pre>
... | 4,326 | 272,735 | 2011-03-07 05:31:22 | 5,039,040 | 12 | 2011-02-18 08:22:47 | 131,966 | 2011-03-07 05:31:22 | https://stackoverflow.com/q/5038803 | https://stackoverflow.com/a/5039040 | <p>Actually, making local copies of readonly global variables is explicitely forbidden for security reasons, as documented in bash source code (in <code>variables.c:make_local_variable</code>):</p>
<blockquote>
<p><strong>The test against old_var's context level is to disallow local copies of readonly global variabl... | <p>Actually, making local copies of readonly global variables is explicitely forbidden for security reasons, as documented in bash source code (in <code>variables.c:make_local_variable</code>):</p> <blockquote> <p><strong>The test against old_var's context level is to disallow local copies of readonly global variabl... | 387, 2182 | bash, scope | <h1>Function local read-only vs. global read-only variable with the same name</h1>
<p>I get a suprising behaviour when I have a function local read-only variable and global read-only variable with the same name.</p>
<p>When read-only option is removed from global declaration. I.e.</p>
<pre><code>declare -r var="main"... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,691 | bash | # Function local read-only vs. global read-only variable with the same name
I get a suprising behaviour when I have a function local read-only variable and global read-only variable with the same name.
When read-only option is removed from global declaration. I.e.
```
declare -r var="main"
```
is changed to:
```
d... | Actually, making local copies of readonly global variables is explicitely forbidden for security reasons, as documented in bash source code (in `variables.c:make_local_variable`):
> **The test against old_var's context level is to disallow local copies of readonly global variables (since "I" believe that this could be... |
4198233 | Spread 'sed' command over multiple lines | 14 | 2010-11-16 19:41:09 | <p>I am trying to spread one sed command over several lines in a bash file. I have multiple patterns that sed checks for and I am hoping to separate some of the patterns by a line change. Here is my current script that does not work, putting everything on one line works but I was hoping to just clean it up a bit and sp... | 19,372 | 217,114 | 2018-07-16 06:43:47 | 4,198,487 | 12 | 2010-11-16 20:11:23 | 26,428 | 2018-05-16 15:31:06 | https://stackoverflow.com/q/4198233 | https://stackoverflow.com/a/4198487 | <p>The problem is on this line:</p>
<pre><code>-e 's/\ Xvid\-Lol//i; s/\ Xvid\-Xor//i; s/\ Xvid\-Notv//i; s/\ Xvid\-Fqm//i; s/\ Xvid\-p0w4//i; Xvid\-BIA//i; s/\ Xvid\-Chgrp//i; s/\ Xvid\-Fov//i' \
</code></pre>
<p>There's a missing <code>s/</code>. It should be:</p>
<pre><code>-e 's/\ Xvid\-Lol//i; s/\ Xvid\-Xor//i;... | <p>The problem is on this line:</p> <pre><code>-e 's/\ Xvid\-Lol//i; s/\ Xvid\-Xor//i; s/\ Xvid\-Notv//i; s/\ Xvid\-Fqm//i; s/\ Xvid\-p0w4//i; Xvid\-BIA//i; s/\ Xvid\-Chgrp//i; s/\ Xvid\-Fov//i' \ </code></pre> <p>There's a missing <code>s/</code>. It should be:</p> <pre><code>-e 's/\ Xvid\-Lol//i; s/\ Xvid\-Xor//i;... | 387, 5282 | bash, sed | <h1>Spread 'sed' command over multiple lines</h1>
<p>I am trying to spread one sed command over several lines in a bash file. I have multiple patterns that sed checks for and I am hoping to separate some of the patterns by a line change. Here is my current script that does not work, putting everything on one line works... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,692 | bash | # Spread 'sed' command over multiple lines
I am trying to spread one sed command over several lines in a bash file. I have multiple patterns that sed checks for and I am hoping to separate some of the patterns by a line change. Here is my current script that does not work, putting everything on one line works but I wa... | The problem is on this line:
```
-e 's/\ Xvid\-Lol//i; s/\ Xvid\-Xor//i; s/\ Xvid\-Notv//i; s/\ Xvid\-Fqm//i; s/\ Xvid\-p0w4//i; Xvid\-BIA//i; s/\ Xvid\-Chgrp//i; s/\ Xvid\-Fov//i' \
```
There's a missing `s/`. It should be:
```
-e 's/\ Xvid\-Lol//i; s/\ Xvid\-Xor//i; s/\ Xvid\-Notv//i; s/\ Xvid\-Fqm//i; s/\ Xvid\-p... |
3174883 | How to remove last directory from a path with sed? | 14 | 2010-07-04 13:54:15 | <p>How to remove the last dir with <code>sed</code> (not <code>dirname</code>), like this:</p>
<pre><code>echo "/dir1/dir2/dir3/dir4" | sed .....
</code></pre>
<p>So I would get <code>/dir1/dir2/dir3</code>.</p>
| 34,291 | 381,293 | 2020-08-20 12:27:16 | 3,174,901 | 12 | 2010-07-04 14:00:42 | 241,521 | 2010-07-04 14:00:42 | https://stackoverflow.com/q/3174883 | https://stackoverflow.com/a/3174901 | <pre><code>sed 's,/*[^/]\+/*$,,'
</code></pre>
<p>If it's part of the shell script, then <code>dirname</code> will be definitely more clear.</p>
| <pre><code>sed 's,/*[^/]\+/*$,,' </code></pre> <p>If it's part of the shell script, then <code>dirname</code> will be definitely more clear.</p> | 390, 5282, 6268 | path, sed, shell | <h1>How to remove last directory from a path with sed?</h1>
<p>How to remove the last dir with <code>sed</code> (not <code>dirname</code>), like this:</p>
<pre><code>echo "/dir1/dir2/dir3/dir4" | sed .....
</code></pre>
<p>So I would get <code>/dir1/dir2/dir3</code>.</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,693 | bash | # How to remove last directory from a path with sed?
How to remove the last dir with `sed` (not `dirname`), like this:
```
echo "/dir1/dir2/dir3/dir4" | sed .....
```
So I would get `/dir1/dir2/dir3`. | ```
sed 's,/*[^/]\+/*$,,'
```
If it's part of the shell script, then `dirname` will be definitely more clear. |
53135226 | What am I allowed to name a function in Powershell? | 13 | 2018-11-03 20:29:42 | <pre><code>PS > function ]{1}
PS > ]
1
PS >
PS
</code></pre>
<p>Why does this work? </p>
<p>What else can I name a function? All I've found so far that works is <code>*</code> and <code>]</code>. </p>
| 1,534 | 6,726,363 | 2018-11-03 21:11:30 | 53,135,308 | 12 | 2018-11-03 20:38:58 | 3,905,079 | 2018-11-03 21:11:30 | https://stackoverflow.com/q/53135226 | https://stackoverflow.com/a/53135308 | <p>You can name it almost anything. You can even include newlines and emoji* in the name.</p>
<pre><code>function Weird`nFunctionの名前😀 { Write-Host hey }
$c = gcm Weird*
$c.Name
& $c
</code></pre>
<p>Escaping helps with lots of things like that:</p>
<pre><code>function `{ { Write-Host cool }
`{
function `0 { Wr... | <p>You can name it almost anything. You can even include newlines and emoji* in the name.</p> <pre><code>function Weird`nFunctionの名前😀 { Write-Host hey } $c = gcm Weird* $c.Name & $c </code></pre> <p>Escaping helps with lots of things like that:</p> <pre><code>function `{ { Write-Host cool } `{ function `0 { Wr... | 526 | powershell | <h1>What am I allowed to name a function in Powershell?</h1>
<pre><code>PS > function ]{1}
PS > ]
1
PS >
PS
</code></pre>
<p>Why does this work? </p>
<p>What else can I name a function? All I've found so far that works is <code>*</code> and <code>]</code>. </p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,694 | bash | # What am I allowed to name a function in Powershell?
```
PS > function ]{1}
PS > ]
1
PS >
PS
```
Why does this work?
What else can I name a function? All I've found so far that works is `*` and `]`. | You can name it almost anything. You can even include newlines and emoji* in the name.
```
function Weird`nFunctionの名前😀 { Write-Host hey }
$c = gcm Weird*
$c.Name
& $c
```
Escaping helps with lots of things like that:
```
function `{ { Write-Host cool }
`{
function `0 { Write-Host null }
gci function:\?
```
I'll ... |
47570866 | PowerShell cmdlet Test-NetConnection not available | 13 | 2017-11-30 10:13:04 | <p>I noticed that the cmdlet <code>Test-NetConnection</code> was not installed on Server 2012. Since Server 2012 comes with PowerShell version 3 so I thought it might help to update to the latest version 5.1.</p>
<p>I did the update but the cmdlet <code>Test-NetConnection</code> is still not available.</p>
<p>Only <c... | 73,461 | 5,675,553 | 2022-02-23 21:46:26 | 47,571,225 | 12 | 2017-11-30 10:31:24 | 1,630,171 | 2017-11-30 10:31:24 | https://stackoverflow.com/q/47570866 | https://stackoverflow.com/a/47571225 | <p>The availability of many cmdlets is tied to the Windows version, not the PowerShell version. If you can't upgrade your Windows version you can't have <code>Test-NetConnection</code>.</p>
<p>You could use a commandline port scanner like <a href="https://nmap.org/download.html" rel="noreferrer">nmap</a> or <a href="h... | <p>The availability of many cmdlets is tied to the Windows version, not the PowerShell version. If you can't upgrade your Windows version you can't have <code>Test-NetConnection</code>.</p> <p>You could use a commandline port scanner like <a href="https://nmap.org/download.html" rel="noreferrer">nmap</a> or <a href="h... | 526, 84278 | powershell, windows-server-2012 | <h1>PowerShell cmdlet Test-NetConnection not available</h1>
<p>I noticed that the cmdlet <code>Test-NetConnection</code> was not installed on Server 2012. Since Server 2012 comes with PowerShell version 3 so I thought it might help to update to the latest version 5.1.</p>
<p>I did the update but the cmdlet <code>Test-... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,695 | bash | # PowerShell cmdlet Test-NetConnection not available
I noticed that the cmdlet `Test-NetConnection` was not installed on Server 2012. Since Server 2012 comes with PowerShell version 3 so I thought it might help to update to the latest version 5.1.
I did the update but the cmdlet `Test-NetConnection` is still not avai... | The availability of many cmdlets is tied to the Windows version, not the PowerShell version. If you can't upgrade your Windows version you can't have `Test-NetConnection`.
You could use a commandline port scanner like [nmap](https://nmap.org/download.html) or [scanline](https://www.mcafee.com/ca/downloads/free-tools/s... |
46562463 | How to load environment variables for the process of a systemd service? | 13 | 2017-10-04 10:20:42 | <p>i am developing some services scripts that need to be executed on boot on Raspbian (Jessie) and i decided to use systemd. I just started to read some quick tutorials on how to use it, but I have problems with the environment.</p>
<p>The processes that are executed require (in their code) some environment variables ... | 19,309 | 6,119,246 | 2017-10-05 05:53:59 | 46,578,750 | 12 | 2017-10-05 05:53:59 | 7,449,540 | 2017-10-05 05:53:59 | https://stackoverflow.com/q/46562463 | https://stackoverflow.com/a/46578750 | <p>Environment can be set in systemd service file as below under Exec options</p>
<pre><code>Environment=LD_LIBRARY_PATH=/usr/lib
</code></pre>
<p>Below is the official documentation of systemd Environment/EnvironmentFile usage</p>
<p><strong>Environment=</strong></p>
<p>Sets environment variables for executed proc... | <p>Environment can be set in systemd service file as below under Exec options</p> <pre><code>Environment=LD_LIBRARY_PATH=/usr/lib </code></pre> <p>Below is the official documentation of systemd Environment/EnvironmentFile usage</p> <p><strong>Environment=</strong></p> <p>Sets environment variables for executed proc... | 387, 390, 9013, 81442, 84436 | bash, environment-variables, raspbian, shell, systemd | <h1>How to load environment variables for the process of a systemd service?</h1>
<p>i am developing some services scripts that need to be executed on boot on Raspbian (Jessie) and i decided to use systemd. I just started to read some quick tutorials on how to use it, but I have problems with the environment.</p>
<p>Th... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,696 | bash | # How to load environment variables for the process of a systemd service?
i am developing some services scripts that need to be executed on boot on Raspbian (Jessie) and i decided to use systemd. I just started to read some quick tutorials on how to use it, but I have problems with the environment.
The processes that... | Environment can be set in systemd service file as below under Exec options
```
Environment=LD_LIBRARY_PATH=/usr/lib
```
Below is the official documentation of systemd Environment/EnvironmentFile usage
**Environment=**
Sets environment variables for executed processes. Takes a space-separated list of variable assign... |
44111831 | bash: read multi-line string into multiple variables | 13 | 2017-05-22 11:33:53 | <p>How can I assign a newline-separated string with e.g. three lines to three variables ?</p>
<pre><code># test string
s='line 01
line 02
line 03'
# this doesn't seem to make any difference at all
IFS=$'\n'
# first naive attempt
read a b c <<< "${s}"
# this prints 'line 01||':
# everything after the first ... | 10,088 | 217,844 | 2023-09-14 18:28:33 | 44,112,055 | 12 | 2017-05-22 11:46:05 | 1,454,708 | 2023-09-14 18:28:33 | https://stackoverflow.com/q/44111831 | https://stackoverflow.com/a/44112055 | <p>read default input delimiter is \n</p>
<pre><code>{ read a; read b; read c;} <<< "${s}"
</code></pre>
<p>-d char : allows to specify another input delimiter</p>
<p>For example is there is no character SOH (1 ASCII) in input string</p>
<pre><code>IFS=$'\n' read -r -d$'\1' a b c <<< "$... | <p>read default input delimiter is \n</p> <pre><code>{ read a; read b; read c;} <<< "${s}" </code></pre> <p>-d char : allows to specify another input delimiter</p> <p>For example is there is no character SOH (1 ASCII) in input string</p> <pre><code>IFS=$'\n' read -r -d$'\1' a b c <<< "$... | 139, 387 | bash, string | <h1>bash: read multi-line string into multiple variables</h1>
<p>How can I assign a newline-separated string with e.g. three lines to three variables ?</p>
<pre><code># test string
s='line 01
line 02
line 03'
# this doesn't seem to make any difference at all
IFS=$'\n'
# first naive attempt
read a b c <<< "$... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,697 | bash | # bash: read multi-line string into multiple variables
How can I assign a newline-separated string with e.g. three lines to three variables ?
```
# test string
s='line 01
line 02
line 03'
# this doesn't seem to make any difference at all
IFS=$'\n'
# first naive attempt
read a b c <<< "${s}"
# this prints 'line 01|... | read default input delimiter is \n
```
{ read a; read b; read c;} <<< "${s}"
```
-d char : allows to specify another input delimiter
For example is there is no character SOH (1 ASCII) in input string
```
IFS=$'\n' read -r -d$'\1' a b c <<< "${s}"
```
We set `IFS` to `$'\n'` because IFS default value is :
```
$ pr... |
35296482 | Invalid Web Uri error on Register-PSRepository | 13 | 2016-02-09 15:58:56 | <p>After Windows November update (<code>PackageManagement</code> and <code>PowerShellGet</code> modules of 1.0.0.1 version) I can't register HTTPS NuGet servers as PSRepository anymore:</p>
<pre><code>Register-PSRepository -Name test -SourceLocation https://some-nuget/api/v2
</code></pre>
<p>It returns error:</p>
<p... | 21,817 | 515,835 | 2023-06-14 11:06:41 | 35,296,483 | 12 | 2016-02-09 15:58:56 | 515,835 | 2016-03-21 14:51:50 | https://stackoverflow.com/q/35296482 | https://stackoverflow.com/a/35296483 | <p>This is caused with a bug related to accessing HTTPS endpoints which probably will be fixed soon.</p>
<p>I still want to share a workaround kindly hinted by <a href="https://github.com/OneGet/oneget" rel="noreferrer">OneGet team</a>:</p>
<pre><code>Function Register-PSRepositoryFix {
[CmdletBinding()]
Para... | <p>This is caused with a bug related to accessing HTTPS endpoints which probably will be fixed soon.</p> <p>I still want to share a workaround kindly hinted by <a href="https://github.com/OneGet/oneget" rel="noreferrer">OneGet team</a>:</p> <pre><code>Function Register-PSRepositoryFix { [CmdletBinding()] Para... | 526, 115517, 115604 | oneget, powershell, powershellget | <h1>Invalid Web Uri error on Register-PSRepository</h1>
<p>After Windows November update (<code>PackageManagement</code> and <code>PowerShellGet</code> modules of 1.0.0.1 version) I can't register HTTPS NuGet servers as PSRepository anymore:</p>
<pre><code>Register-PSRepository -Name test -SourceLocation https://some-... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,698 | bash | # Invalid Web Uri error on Register-PSRepository
After Windows November update (`PackageManagement` and `PowerShellGet` modules of 1.0.0.1 version) I can't register HTTPS NuGet servers as PSRepository anymore:
```
Register-PSRepository -Name test -SourceLocation https://some-nuget/api/v2
```
It returns error:
```
#... | This is caused with a bug related to accessing HTTPS endpoints which probably will be fixed soon.
I still want to share a workaround kindly hinted by [OneGet team](https://github.com/OneGet/oneget):
```
Function Register-PSRepositoryFix {
[CmdletBinding()]
Param (
[Parameter(Mandatory=$true)]
... |
30269722 | Declaring arrays in ZSH | 13 | 2015-05-15 22:33:43 | <p>I'm having trouble converting a shell script to zsh. I have the following array defined, but it is throwing the error <code>unknown file attribute: \n</code>. (I'm converting a dotfiles repo to my zsh)</p>
<pre><code>declare -r -a FILES_TO_SOURCE=(
"bash_aliases"
"bash_exports"
"bash_functions"
"bas... | 19,207 | 3,272,411 | 2015-05-16 21:12:08 | 30,270,126 | 12 | 2015-05-15 23:20:23 | 258,523 | 2015-05-16 21:12:08 | https://stackoverflow.com/q/30269722 | https://stackoverflow.com/a/30270126 | <p>From <code>man zshbuiltins</code>, under the entry for <code>typeset</code> (of which <code>declare</code> is a synonym):</p>
<blockquote>
<p>For each <em>name=value</em> assignment, the parameter <em>name</em> is set to <em>value</em>. Note that arrays currently cannot
be assigned in <stron... | <p>From <code>man zshbuiltins</code>, under the entry for <code>typeset</code> (of which <code>declare</code> is a synonym):</p> <blockquote> <p>For each <em>name=value</em> assignment, the parameter <em>name</em> is set to <em>value</em>. Note that arrays currently cannot be assigned in <stron... | 390, 1231, 3791 | command-line, shell, zsh | <h1>Declaring arrays in ZSH</h1>
<p>I'm having trouble converting a shell script to zsh. I have the following array defined, but it is throwing the error <code>unknown file attribute: \n</code>. (I'm converting a dotfiles repo to my zsh)</p>
<pre><code>declare -r -a FILES_TO_SOURCE=(
"bash_aliases"
"bash_expor... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,699 | bash | # Declaring arrays in ZSH
I'm having trouble converting a shell script to zsh. I have the following array defined, but it is throwing the error `unknown file attribute: \n`. (I'm converting a dotfiles repo to my zsh)
```
declare -r -a FILES_TO_SOURCE=(
"bash_aliases"
"bash_exports"
"bash_functions"
"b... | From `man zshbuiltins`, under the entry for `typeset` (of which `declare` is a synonym):
> For each *name=value* assignment, the parameter *name* is set to *value*. Note that arrays currently cannot
> be assigned in **typeset** expressions, only scalars and integers.
Try this instead:
```
declare -a FILES_TO_SOURCE
... |
25450521 | File Name Contains Certain Text | 13 | 2014-08-22 15:26:14 | <p>I know this is a new guy question, but I cant find anything. I think the issue might have to do with variable type issue?</p>
<p>I'm trying to look at a files name and see if pattern1 is contained in the file name. If so then replace the pattern text with "TEST".</p>
<p>Right now it doesn't error out, but it skip... | 79,994 | 3,557,977 | 2014-08-22 16:09:24 | 25,450,723 | 12 | 2014-08-22 15:38:40 | 3,245,749 | 2014-08-22 15:38:40 | https://stackoverflow.com/q/25450521 | https://stackoverflow.com/a/25450723 | <p>The whole issue is that you use -Contains where you should use -Match. Try this though, it's easily expandable if you have more conditions to add:</p>
<pre><code>$pattern1 = "January"
$pattern2 = "December 31"
$path = "C:\Users\...\METRICS-TEST\Metrics 2014\January 2014 Client Metrics"
Switch(Get-ChildItem -Path $... | <p>The whole issue is that you use -Contains where you should use -Match. Try this though, it's easily expandable if you have more conditions to add:</p> <pre><code>$pattern1 = "January" $pattern2 = "December 31" $path = "C:\Users\...\METRICS-TEST\Metrics 2014\January 2014 Client Metrics" Switch(Get-ChildItem -Path $... | 526, 24067 | powershell, powershell-2.0 | <h1>File Name Contains Certain Text</h1>
<p>I know this is a new guy question, but I cant find anything. I think the issue might have to do with variable type issue?</p>
<p>I'm trying to look at a files name and see if pattern1 is contained in the file name. If so then replace the pattern text with "TEST".</p>
<p>Ri... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,700 | bash | # File Name Contains Certain Text
I know this is a new guy question, but I cant find anything. I think the issue might have to do with variable type issue?
I'm trying to look at a files name and see if pattern1 is contained in the file name. If so then replace the pattern text with "TEST".
Right now it doesn't error... | The whole issue is that you use -Contains where you should use -Match. Try this though, it's easily expandable if you have more conditions to add:
```
$pattern1 = "January"
$pattern2 = "December 31"
$path = "C:\Users\...\METRICS-TEST\Metrics 2014\January 2014 Client Metrics"
Switch(Get-ChildItem -Path $path){
{$_... |
20790798 | Start-Process -wait doesn't work when script is launched from command prompt opened with runas or as a scheduled task | 13 | 2013-12-26 20:22:30 | <p>I've got a script that's I want to run as a scheduled task, but it's not doing the thing it's supposed to. I'm trying to call an executable with Start-Process and the -Wait switch before continuing. Line is</p>
<blockquote>
<p>Start-Process -FilePath "C:\Pfx Engagement\Admin\Utilities\Backup Restore\BackupRestore... | 24,025 | 3,137,716 | 2013-12-26 20:39:45 | 20,790,955 | 12 | 2013-12-26 20:39:45 | 574,168 | 2013-12-26 20:39:45 | https://stackoverflow.com/q/20790798 | https://stackoverflow.com/a/20790955 | <p>Can't tell you why it's doing it, but I think this might work around it:</p>
<pre><code>$proc = Start-Process -FilePath "C:\Pfx Engagement\Admin\Utilities\Backup Restore\BackupRestoreUtil.exe" -ArgumentList "/f "$backup_directory"" -Passthru
do {start-sleep -Milliseconds 500}
until ($proc.HasExited)
</code></pre>
... | <p>Can't tell you why it's doing it, but I think this might work around it:</p> <pre><code>$proc = Start-Process -FilePath "C:\Pfx Engagement\Admin\Utilities\Backup Restore\BackupRestoreUtil.exe" -ArgumentList "/f "$backup_directory"" -Passthru do {start-sleep -Milliseconds 500} until ($proc.HasExited) </code></pre> ... | 526, 9299, 21289, 26462, 36466 | powershell, scheduled-tasks, start-process, wait, windows-server-2008-r2 | <h1>Start-Process -wait doesn't work when script is launched from command prompt opened with runas or as a scheduled task</h1>
<p>I've got a script that's I want to run as a scheduled task, but it's not doing the thing it's supposed to. I'm trying to call an executable with Start-Process and the -Wait switch before con... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,701 | bash | # Start-Process -wait doesn't work when script is launched from command prompt opened with runas or as a scheduled task
I've got a script that's I want to run as a scheduled task, but it's not doing the thing it's supposed to. I'm trying to call an executable with Start-Process and the -Wait switch before continuing. ... | Can't tell you why it's doing it, but I think this might work around it:
```
$proc = Start-Process -FilePath "C:\Pfx Engagement\Admin\Utilities\Backup Restore\BackupRestoreUtil.exe" -ArgumentList "/f "$backup_directory"" -Passthru
do {start-sleep -Milliseconds 500}
until ($proc.HasExited)
```
The -Passthru switch wil... |
19563737 | Change current directory with node | 13 | 2013-10-24 10:44:41 | <p>I'm trying to write a command line utility in node.js. As one of the features it should change the current working directory of the shell it was called from. Something like node.js version of <code>cd</code>. Is it possible to achieve this? If so, how?</p>
<p> </p>
<hr>
<p> </p>
<p>To clarify, I'd like... | 23,815 | 876,409 | 2022-01-28 11:41:24 | 19,565,916 | 12 | 2013-10-24 12:26:06 | 893,780 | 2013-10-24 12:35:31 | https://stackoverflow.com/q/19563737 | https://stackoverflow.com/a/19565916 | <p>In short: you can't. The working directory is limited to the context of a process (and perhaps child processes, but certainly not parent processes). So the cwd of your Node process cannot propagate back to your shell process.</p>
<p>A common trick is to have your Node app print the working directory to stdout, and ... | <p>In short: you can't. The working directory is limited to the context of a process (and perhaps child processes, but certainly not parent processes). So the cwd of your Node process cannot propagate back to your shell process.</p> <p>A common trick is to have your Node app print the working directory to stdout, and ... | 3, 387, 390, 46426 | bash, javascript, node.js, shell | <h1>Change current directory with node</h1>
<p>I'm trying to write a command line utility in node.js. As one of the features it should change the current working directory of the shell it was called from. Something like node.js version of <code>cd</code>. Is it possible to achieve this? If so, how?</p>
<p> </p>
... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,702 | bash | # Change current directory with node
I'm trying to write a command line utility in node.js. As one of the features it should change the current working directory of the shell it was called from. Something like node.js version of `cd`. Is it possible to achieve this? If so, how?
---
To clarify, I'd like to be able to... | In short: you can't. The working directory is limited to the context of a process (and perhaps child processes, but certainly not parent processes). So the cwd of your Node process cannot propagate back to your shell process.
A common trick is to have your Node app print the working directory to stdout, and have your ... |
19456184 | CLI: implement something like git commit (open a text editor and get value) | 13 | 2013-10-18 17:59:57 | <p>I am making a command line app. I want to allow the user, when they are adding values for things in the terminal, to be able to add the value with their text editor. How does git achieve this? </p>
<p>I want to open their default editor, allow them to enter text, and when they save get the value and use that value ... | 2,488 | 2,433,617 | 2013-10-18 18:07:31 | 19,456,297 | 12 | 2013-10-18 18:07:31 | 1,126,841 | 2013-10-18 18:07:31 | https://stackoverflow.com/q/19456184 | https://stackoverflow.com/a/19456297 | <p>Typically, you do four things:</p>
<ol>
<li>Create a temporary file</li>
<li>Fork an external process which execs the program specified in the environment variable <code>$EDITOR</code>, giving the name of the temporary file as an argument.</li>
<li>Wait for the process to return.</li>
<li>Open and read from the tem... | <p>Typically, you do four things:</p> <ol> <li>Create a temporary file</li> <li>Fork an external process which execs the program specified in the environment variable <code>$EDITOR</code>, giving the name of the temporary file as an argument.</li> <li>Wait for the process to return.</li> <li>Open and read from the tem... | 119, 390, 1231, 11225, 46426 | command-line, command-line-interface, git, node.js, shell | <h1>CLI: implement something like git commit (open a text editor and get value)</h1>
<p>I am making a command line app. I want to allow the user, when they are adding values for things in the terminal, to be able to add the value with their text editor. How does git achieve this? </p>
<p>I want to open their default e... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,703 | bash | # CLI: implement something like git commit (open a text editor and get value)
I am making a command line app. I want to allow the user, when they are adding values for things in the terminal, to be able to add the value with their text editor. How does git achieve this?
I want to open their default editor, allow them... | Typically, you do four things:
1. Create a temporary file
2. Fork an external process which execs the program specified in the environment variable `$EDITOR`, giving the name of the temporary file as an argument.
3. Wait for the process to return.
4. Open and read from the temporary file to see what the user wrote. |
17847276 | Is an exception from a .NET method a terminating or not-terminating error? | 13 | 2013-07-25 01:02:21 | <p>In this <a href="http://rkeithhill.wordpress.com/2009/08/03/effective-powershell-item-16-dealing-with-errors/" rel="nofollow noreferrer">great article</a> Keith explains the difference between terminating and non-terminating errors in Powershell. According to Keith exceptions thrown from calls to a member of a .NET ... | 4,203 | 284,111 | 2025-03-15 22:42:01 | 17,849,307 | 12 | 2013-07-25 04:56:19 | 153,982 | 2013-07-25 05:01:52 | https://stackoverflow.com/q/17847276 | https://stackoverflow.com/a/17849307 | <p>Yeah, this came up on the PowerShell MVP email list earlier this year. PowerShell changes its error handling behavior for .NET exceptions depending on whether or not there is an outer try/catch. This is just speculation but I'm guessing that this was for simple scripting scenarios. That is, if the scripter (admin... | <p>Yeah, this came up on the PowerShell MVP email list earlier this year. PowerShell changes its error handling behavior for .NET exceptions depending on whether or not there is an outer try/catch. This is just speculation but I'm guessing that this was for simple scripting scenarios. That is, if the scripter (admin... | 379, 526, 5142 | error-handling, exception, powershell | <h1>Is an exception from a .NET method a terminating or not-terminating error?</h1>
<p>In this <a href="http://rkeithhill.wordpress.com/2009/08/03/effective-powershell-item-16-dealing-with-errors/" rel="nofollow noreferrer">great article</a> Keith explains the difference between terminating and non-terminating errors i... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,704 | bash | # Is an exception from a .NET method a terminating or not-terminating error?
In this [great article](http://rkeithhill.wordpress.com/2009/08/03/effective-powershell-item-16-dealing-with-errors/) Keith explains the difference between terminating and non-terminating errors in Powershell. According to Keith exceptions th... | Yeah, this came up on the PowerShell MVP email list earlier this year. PowerShell changes its error handling behavior for .NET exceptions depending on whether or not there is an outer try/catch. This is just speculation but I'm guessing that this was for simple scripting scenarios. That is, if the scripter (admin) mess... |
13976472 | What does if [ "x" != x ] do in bash? | 13 | 2012-12-20 16:29:05 | <p>I'm looking at the source code of virtualenv, and the activate script contains this code: </p>
<pre><code>if [ -z "$VIRTUAL_ENV_DISABLE_PROMPT" ] ; then
_OLD_VIRTUAL_PS1="$PS1"
if [ "x" != x ] ; then
PS1="$PS1"
else
if [ "`basename \"$VIRTUAL_ENV\"`" = "__" ] ; then
# special... | 6,283 | 1,559,908 | 2012-12-20 16:34:40 | 13,976,553 | 12 | 2012-12-20 16:33:23 | 978,917 | 2012-12-20 16:33:23 | https://stackoverflow.com/q/13976472 | https://stackoverflow.com/a/13976553 | <p>In Bash, that test is guaranteed to fail; <code>[ "x" != x ]</code> always returns a non-zero exit status (i.e. "false"), because <code>"x"</code> and <code>x</code> are both the string consisting of the single character <code>x</code>. (The quotation marks don't really have any effect in this case.)</p>
<p>What's ... | <p>In Bash, that test is guaranteed to fail; <code>[ "x" != x ]</code> always returns a non-zero exit status (i.e. "false"), because <code>"x"</code> and <code>x</code> are both the string consisting of the single character <code>x</code>. (The quotation marks don't really have any effect in this case.)</p> <p>What's ... | 390 | shell | <h1>What does if [ "x" != x ] do in bash?</h1>
<p>I'm looking at the source code of virtualenv, and the activate script contains this code: </p>
<pre><code>if [ -z "$VIRTUAL_ENV_DISABLE_PROMPT" ] ; then
_OLD_VIRTUAL_PS1="$PS1"
if [ "x" != x ] ; then
PS1="$PS1"
else
if [ "`basename \"$VI... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,705 | bash | # What does if [ "x" != x ] do in bash?
I'm looking at the source code of virtualenv, and the activate script contains this code:
```
if [ -z "$VIRTUAL_ENV_DISABLE_PROMPT" ] ; then
_OLD_VIRTUAL_PS1="$PS1"
if [ "x" != x ] ; then
PS1="$PS1"
else
if [ "`basename \"$VIRTUAL_ENV\"`" = "__" ]... | In Bash, that test is guaranteed to fail; `[ "x" != x ]` always returns a non-zero exit status (i.e. "false"), because `"x"` and `x` are both the string consisting of the single character `x`. (The quotation marks don't really have any effect in this case.)
What's more, the command `PS1="$PS1"` doesn't really do anyth... |
12818987 | Pass ATTR{idVendor} as argument in udev script | 13 | 2012-10-10 12:08:15 | <p>I have a script which is run whenever a usb device by vendor 1004 is connected. The udev rule I am using works and looks like this.</p>
<pre><code>SUBSYSTEM=="usb", ATTR{idVendor}=="1004", RUN+="/var/www/beta/trigger.php"
</code></pre>
<p>Now I would like to have this script run whenever ANY usb device is connecte... | 18,562 | 1,230,420 | 2017-05-10 13:44:14 | 12,819,134 | 12 | 2012-10-10 12:15:49 | 1,686,814 | 2012-10-10 12:15:49 | https://stackoverflow.com/q/12818987 | https://stackoverflow.com/a/12819134 | <p><code>udev</code> sets for you several environmental variables that you can use, among others <code>ID_VENDOR</code>. Try that little script:</p>
<pre><code>#!/bin/bash
echo "Called by udev" >> /tmp/testenv
env >> /tmp/testenv
echo "Vendor id is $ID_VENDOR" >> /tmp/testenv
</code></pre>
<p>Put i... | <p><code>udev</code> sets for you several environmental variables that you can use, among others <code>ID_VENDOR</code>. Try that little script:</p> <pre><code>#!/bin/bash echo "Called by udev" >> /tmp/testenv env >> /tmp/testenv echo "Vendor id is $ID_VENDOR" >> /tmp/testenv </code></pre> <p>Put i... | 58, 390, 393, 11490 | linux, shell, udev, usb | <h1>Pass ATTR{idVendor} as argument in udev script</h1>
<p>I have a script which is run whenever a usb device by vendor 1004 is connected. The udev rule I am using works and looks like this.</p>
<pre><code>SUBSYSTEM=="usb", ATTR{idVendor}=="1004", RUN+="/var/www/beta/trigger.php"
</code></pre>
<p>Now I would like to ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,706 | bash | # Pass ATTR{idVendor} as argument in udev script
I have a script which is run whenever a usb device by vendor 1004 is connected. The udev rule I am using works and looks like this.
```
SUBSYSTEM=="usb", ATTR{idVendor}=="1004", RUN+="/var/www/beta/trigger.php"
```
Now I would like to have this script run whenever ANY... | `udev` sets for you several environmental variables that you can use, among others `ID_VENDOR`. Try that little script:
```
#!/bin/bash
echo "Called by udev" >> /tmp/testenv
env >> /tmp/testenv
echo "Vendor id is $ID_VENDOR" >> /tmp/testenv
```
Put it in a rule, and you will see how much things are set up for you. |
12405119 | Unix cut: Print same Field twice | 13 | 2012-09-13 11:22:29 | <p>Say I have file - a.csv</p>
<pre><code>ram,33,professional,doc
shaym,23,salaried,eng
</code></pre>
<p>Now I need this output (pls dont ask me why)</p>
<pre><code>ram,doc,doc,
shayam,eng,eng,
</code></pre>
<p>I am using cut command</p>
<pre><code>cut -d',' -f1,4,4 a.csv
</code></pre>
<p>But the output remains<... | 8,901 | 1,662,774 | 2019-07-14 13:24:54 | 12,405,420 | 12 | 2012-09-13 11:39:52 | 387,076 | 2012-09-13 11:48:09 | https://stackoverflow.com/q/12405119 | https://stackoverflow.com/a/12405420 | <p>You can't print the same field twice. <code>cut</code> prints a selection of fields (or characters or bytes) in order. See <a href="https://unix.stackexchange.com/questions/47048/combining-2-different-cut-outputs-in-a-single-command">Combining 2 different cut outputs in a single command?</a> and <a href="https://uni... | <p>You can't print the same field twice. <code>cut</code> prints a selection of fields (or characters or bytes) in order. See <a href="https://unix.stackexchange.com/questions/47048/combining-2-different-cut-outputs-in-a-single-command">Combining 2 different cut outputs in a single command?</a> and <a href="https://uni... | 34, 390, 4257, 5282 | cut, sed, shell, unix | <h1>Unix cut: Print same Field twice</h1>
<p>Say I have file - a.csv</p>
<pre><code>ram,33,professional,doc
shaym,23,salaried,eng
</code></pre>
<p>Now I need this output (pls dont ask me why)</p>
<pre><code>ram,doc,doc,
shayam,eng,eng,
</code></pre>
<p>I am using cut command</p>
<pre><code>cut -d',' -f1,4,4 a.csv... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,707 | bash | # Unix cut: Print same Field twice
Say I have file - a.csv
```
ram,33,professional,doc
shaym,23,salaried,eng
```
Now I need this output (pls dont ask me why)
```
ram,doc,doc,
shayam,eng,eng,
```
I am using cut command
```
cut -d',' -f1,4,4 a.csv
```
But the output remains
```
ram,doc
shyam,eng
```
That means *... | You can't print the same field twice. `cut` prints a selection of fields (or characters or bytes) in order. See [Combining 2 different cut outputs in a single command?](https://unix.stackexchange.com/questions/47048/combining-2-different-cut-outputs-in-a-single-command) and [Reorder fields/characters with cut command](... |
10700660 | Add-PsSnapin WebAdministration in Windows7 | 13 | 2012-05-22 10:58:08 | <p>I want to use PowerShell to administer my IIS7 on Windows7 64 bits. </p>
<p>I try install IIS7 Powershell snap-in <a href="http://www.iis.net/download/PowerShell" rel="nofollow noreferrer">http://www.iis.net/download/PowerShell</a></p>
<p>I "Run as administrator", then typing the command listed below: msiexec /I ... | 29,484 | 206,730 | 2012-05-22 13:48:41 | 10,701,434 | 12 | 2012-05-22 11:48:26 | 311,712 | 2012-05-22 11:48:26 | https://stackoverflow.com/q/10700660 | https://stackoverflow.com/a/10701434 | <p>Here is the function I have in my profile.ps1 for loading the WebAdmin module. It covers IIS 7 and 7.5</p>
<pre><code># Web administration is loaded as a module on Windows 2008 R2 but as a set of snapins
# for Windows 2008 (not R2)
function Util-Load-Web-Administration
{
$ModuleName = "WebAdministration"
$... | <p>Here is the function I have in my profile.ps1 for loading the WebAdmin module. It covers IIS 7 and 7.5</p> <pre><code># Web administration is loaded as a module on Windows 2008 R2 but as a set of snapins # for Windows 2008 (not R2) function Util-Load-Web-Administration { $ModuleName = "WebAdministration" $... | 526, 23478, 34595, 35311, 68067 | iis-7.5, powershell, snap-in, web-administration, windows-7 | <h1>Add-PsSnapin WebAdministration in Windows7</h1>
<p>I want to use PowerShell to administer my IIS7 on Windows7 64 bits. </p>
<p>I try install IIS7 Powershell snap-in <a href="http://www.iis.net/download/PowerShell" rel="nofollow noreferrer">http://www.iis.net/download/PowerShell</a></p>
<p>I "Run as administrator... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,708 | bash | # Add-PsSnapin WebAdministration in Windows7
I want to use PowerShell to administer my IIS7 on Windows7 64 bits.
I try install IIS7 Powershell snap-in <http://www.iis.net/download/PowerShell>
I "Run as administrator", then typing the command listed below: msiexec /I iis7psprov_x64.msi but I get this error message: "... | Here is the function I have in my profile.ps1 for loading the WebAdmin module. It covers IIS 7 and 7.5
```
# Web administration is loaded as a module on Windows 2008 R2 but as a set of snapins
# for Windows 2008 (not R2)
function Util-Load-Web-Administration
{
$ModuleName = "WebAdministration"
$ModuleLoaded =... |
8641109 | Encrypt a file using bash shell script | 13 | 2011-12-27 04:18:34 | <p>I want to encrypt a file using openssl. I can do it by using </p>
<pre><code>openssl des3 -salt -in /pritom/uaeyha_com.sql -out /pritom/a.ss
</code></pre>
<p>When I run this command, it gets password from me two times. I want to set password with the script and I used </p>
<pre><code>openssl des3 -salt -in /prit... | 14,623 | 1,044,804 | 2014-12-27 09:48:29 | 8,641,318 | 12 | 2011-12-27 04:56:47 | 970,195 | 2011-12-27 04:56:47 | https://stackoverflow.com/q/8641109 | https://stackoverflow.com/a/8641318 | <p>Try something like this - </p>
<pre><code>openssl des3 -salt -in /pritom/uaeyha_com.sql -out /pritom/a.ss -pass pass:pritom
</code></pre>
<p>From the <code>man</code> page:</p>
<blockquote>
<p><code>PASS PHRASE ARGUMENTS<br>
Several commands accept password arguments, typically using -passin and -passo... | <p>Try something like this - </p> <pre><code>openssl des3 -salt -in /pritom/uaeyha_com.sql -out /pritom/a.ss -pass pass:pritom </code></pre> <p>From the <code>man</code> page:</p> <blockquote> <p><code>PASS PHRASE ARGUMENTS<br> Several commands accept password arguments, typically using -passin and -passo... | 58, 219, 387, 390, 1999 | bash, encryption, linux, openssl, shell | <h1>Encrypt a file using bash shell script</h1>
<p>I want to encrypt a file using openssl. I can do it by using </p>
<pre><code>openssl des3 -salt -in /pritom/uaeyha_com.sql -out /pritom/a.ss
</code></pre>
<p>When I run this command, it gets password from me two times. I want to set password with the script and I us... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,709 | bash | # Encrypt a file using bash shell script
I want to encrypt a file using openssl. I can do it by using
```
openssl des3 -salt -in /pritom/uaeyha_com.sql -out /pritom/a.ss
```
When I run this command, it gets password from me two times. I want to set password with the script and I used
```
openssl des3 -salt -in /pri... | Try something like this -
```
openssl des3 -salt -in /pritom/uaeyha_com.sql -out /pritom/a.ss -pass pass:pritom
```
From the `man` page:
> `PASS PHRASE ARGUMENTS
> Several commands accept password arguments, typically using -passin and -passout for input and output
> passwords respectively. These allow the passwor... |
8082947 | How to pass an array to a bash function | 13 | 2011-11-10 16:34:41 | <p>How do I pass an array to a function, and why wouldn't this work?
The solutions in other questions didn't work for me.
For the record, I don't need to copy the array so I don't mind passing a reference. All I want to do is loop over it.</p>
<pre><code>$ ar=(a b c)
$ function test() { echo ${1[@]}; }
$ echo ${ar[@]}... | 8,503 | 995,421 | 2013-09-04 02:10:49 | 8,083,147 | 12 | 2011-11-10 16:46:53 | 378,193 | 2011-11-10 16:46:53 | https://stackoverflow.com/q/8082947 | https://stackoverflow.com/a/8083147 | <pre><code>#!/bin/bash
ar=( a b c )
test() {
local ref=$1[@]
echo ${!ref}
}
test ar
</code></pre>
| <pre><code>#!/bin/bash ar=( a b c ) test() { local ref=$1[@] echo ${!ref} } test ar </code></pre> | 114, 387, 390 | arrays, bash, shell | <h1>How to pass an array to a bash function</h1>
<p>How do I pass an array to a function, and why wouldn't this work?
The solutions in other questions didn't work for me.
For the record, I don't need to copy the array so I don't mind passing a reference. All I want to do is loop over it.</p>
<pre><code>$ ar=(a b c)
$ ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,710 | bash | # How to pass an array to a bash function
How do I pass an array to a function, and why wouldn't this work?
The solutions in other questions didn't work for me.
For the record, I don't need to copy the array so I don't mind passing a reference. All I want to do is loop over it.
```
$ ar=(a b c)
$ function test() { ec... | ```
#!/bin/bash
ar=( a b c )
test() {
local ref=$1[@]
echo ${!ref}
}
test ar
``` |
7721081 | Does there exist standard way to run external program in Common Lisp? | 13 | 2011-10-11 03:24:18 | <p>In clisp, the following code works:</p>
<pre><code>(defun hit-history () (shell "tail ssqHitNum.txt"))
</code></pre>
<p>However, in Clozure CL, the <code>shell</code> function is not supported!</p>
| 8,029 | 777,131 | 2019-09-27 20:11:21 | 7,721,356 | 12 | 2011-10-11 04:24:09 | 271,324 | 2017-01-03 22:45:12 | https://stackoverflow.com/q/7721081 | https://stackoverflow.com/a/7721356 | <p>No, there is no standard way, but there are libraries which provide this functionality for the important implementations. For example, there's trivial-shell available in <a href="http://www.quicklisp.org/" rel="nofollow noreferrer">Quicklisp</a>, which provides <code>shell-command</code>. (I didn't actually test it,... | <p>No, there is no standard way, but there are libraries which provide this functionality for the important implementations. For example, there's trivial-shell available in <a href="http://www.quicklisp.org/" rel="nofollow noreferrer">Quicklisp</a>, which provides <code>shell-command</code>. (I didn't actually test it,... | 390, 7610, 7932, 58311 | ccl, common-lisp, exec, shell | <h1>Does there exist standard way to run external program in Common Lisp?</h1>
<p>In clisp, the following code works:</p>
<pre><code>(defun hit-history () (shell "tail ssqHitNum.txt"))
</code></pre>
<p>However, in Clozure CL, the <code>shell</code> function is not supported!</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,711 | bash | # Does there exist standard way to run external program in Common Lisp?
In clisp, the following code works:
```
(defun hit-history () (shell "tail ssqHitNum.txt"))
```
However, in Clozure CL, the `shell` function is not supported! | No, there is no standard way, but there are libraries which provide this functionality for the important implementations. For example, there's trivial-shell available in [Quicklisp](http://www.quicklisp.org/), which provides `shell-command`. (I didn't actually test it, but its among the [recommended libraries](http://w... |
2331936 | Bash Scripting and bc | 13 | 2010-02-25 05:50:20 | <p>I'm trying to write a bash script and I needed to do some floating point math. Basically I want to do something like this:</p>
<pre><code>NUM=$(echo "scale=25;$1/10" | bc)
if [ $? -ne 0 ]
then
echo bad
fi
</code></pre>
<p>The problem I'm running into is $? tends to hold the output from the echo program and not th... | 62,030 | 262,125 | 2013-07-09 23:44:56 | 2,331,976 | 12 | 2010-02-25 05:59:19 | 131,527 | 2010-02-25 08:31:22 | https://stackoverflow.com/q/2331936 | https://stackoverflow.com/a/2331976 | <p>I don't see anything wrong. $NUM is supposed to hold your <code>bc</code> command results</p>
<p>see:</p>
<pre><code>NUM=$(echo "scale=25;$1/10" | bc)
echo "\$? is $?"
echo "NUM is $NUM"
</code></pre>
<p>output</p>
<pre><code>$ ./shell.sh 10
$? is 0
NUM is 1.0000000000000000000000000
</code></pre>
<p>another wa... | <p>I don't see anything wrong. $NUM is supposed to hold your <code>bc</code> command results</p> <p>see:</p> <pre><code>NUM=$(echo "scale=25;$1/10" | bc) echo "\$? is $?" echo "NUM is $NUM" </code></pre> <p>output</p> <pre><code>$ ./shell.sh 10 $? is 0 NUM is 1.0000000000000000000000000 </code></pre> <p>another wa... | 387, 531, 10327, 34696 | bash, bc, scripting, sh | <h1>Bash Scripting and bc</h1>
<p>I'm trying to write a bash script and I needed to do some floating point math. Basically I want to do something like this:</p>
<pre><code>NUM=$(echo "scale=25;$1/10" | bc)
if [ $? -ne 0 ]
then
echo bad
fi
</code></pre>
<p>The problem I'm running into is $? tends to hold the output f... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,712 | bash | # Bash Scripting and bc
I'm trying to write a bash script and I needed to do some floating point math. Basically I want to do something like this:
```
NUM=$(echo "scale=25;$1/10" | bc)
if [ $? -ne 0 ]
then
echo bad
fi
```
The problem I'm running into is $? tends to hold the output from the echo program and not the b... | I don't see anything wrong. $NUM is supposed to hold your `bc` command results
see:
```
NUM=$(echo "scale=25;$1/10" | bc)
echo "\$? is $?"
echo "NUM is $NUM"
```
output
```
$ ./shell.sh 10
$? is 0
NUM is 1.0000000000000000000000000
```
another way is to use awk
```
NUM=$(awk -vinput="$1" 'BEGIN{printf "%.25f", in... |
1127994 | To bind clear to ^l in Bash | 13 | 2009-07-14 20:56:53 | <p>I would like to have <code>Ctrl-l</code> for <code>clear</code> in my Bash.</p>
<p><strong>How can you bind <code>Ctrl-l</code> to <code>clear</code> in Bash?</strong></p>
| 5,431 | 54,964 | 2020-07-06 03:06:20 | 1,128,021 | 12 | 2009-07-14 21:02:15 | 47,529 | 2009-07-14 21:02:15 | https://stackoverflow.com/q/1127994 | https://stackoverflow.com/a/1128021 | <p>Put this in your <code>~/.inputrc</code>:</p>
<pre><code>C-L: backward-kill-line
</code></pre>
<p>(assuming by "clear" you mean "clear current input line"; if you mean "clear screen" then put <code>clear-screen</code> instead of <code>backward-kill-line</code>).</p>
| <p>Put this in your <code>~/.inputrc</code>:</p> <pre><code>C-L: backward-kill-line </code></pre> <p>(assuming by "clear" you mean "clear current input line"; if you mean "clear screen" then put <code>clear-screen</code> instead of <code>backward-kill-line</code>).</p> | 387, 1137 | bash, binding | <h1>To bind clear to ^l in Bash</h1>
<p>I would like to have <code>Ctrl-l</code> for <code>clear</code> in my Bash.</p>
<p><strong>How can you bind <code>Ctrl-l</code> to <code>clear</code> in Bash?</strong></p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,713 | bash | # To bind clear to ^l in Bash
I would like to have `Ctrl-l` for `clear` in my Bash.
**How can you bind `Ctrl-l` to `clear` in Bash?** | Put this in your `~/.inputrc`:
```
C-L: backward-kill-line
```
(assuming by "clear" you mean "clear current input line"; if you mean "clear screen" then put `clear-screen` instead of `backward-kill-line`). |
548676 | How useful/difficult would it be for me to learn linux shell scripting? Alternative recommendations? | 13 | 2009-02-14 07:15:10 | <p>I am in desperate need of some advice.</p>
<p>I'm almost done with my junior year as a CS major. I sort of feel like a late comer because I didn't really get into computer science until sophomore year... Through hard work, lots of credit hours during the year and summer school I am almost caught up to my peers b... | 14,494 | 14,013 | 2017-10-22 05:35:36 | 548,720 | 12 | 2009-02-14 08:02:09 | 1,438 | 2009-02-17 22:24:15 | https://stackoverflow.com/q/548676 | https://stackoverflow.com/a/548720 | <p>Sounds like a fine plan. Some suggestions:</p>
<ol>
<li><p>Learn to automate everything you can. Make it a habit. If you do something more than a couple times, put it in a script. It's not just to avoid typing but to document the process. Improve your scripts as you notice problems. Share your scripts when ap... | <p>Sounds like a fine plan. Some suggestions:</p> <ol> <li><p>Learn to automate everything you can. Make it a habit. If you do something more than a couple times, put it in a script. It's not just to avoid typing but to document the process. Improve your scripts as you notice problems. Share your scripts when ap... | 58, 390 | linux, shell | <h1>How useful/difficult would it be for me to learn linux shell scripting? Alternative recommendations?</h1>
<p>I am in desperate need of some advice.</p>
<p>I'm almost done with my junior year as a CS major. I sort of feel like a late comer because I didn't really get into computer science until sophomore year... ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,714 | bash | # How useful/difficult would it be for me to learn linux shell scripting? Alternative recommendations?
I am in desperate need of some advice.
I'm almost done with my junior year as a CS major. I sort of feel like a late comer because I didn't really get into computer science until sophomore year... Through hard work,... | Sounds like a fine plan. Some suggestions:
1. Learn to automate everything you can. Make it a habit. If you do something more than a couple times, put it in a script. It's not just to avoid typing but to document the process. Improve your scripts as you notice problems. Share your scripts when appropriate.
2. Learn th... |
63508364 | Azure DevOps reports PowerShell task as passed even with non-0 exit code | 12 | 2020-08-20 15:26:48 | <p>In Azure DevOps I have a task to run a PowerShell script. In certain scenarios, the script should exit with a non-0 code, causing the task to be reported as failed. However, Azure DevOps reports the task as passed regardless.</p>
<p>This is a problem because I have a subsequent job that should run if this job fails,... | 16,254 | 567,059 | 2022-09-22 11:52:52 | 63,516,324 | 12 | 2020-08-21 03:58:58 | 11,882,186 | 2020-08-21 03:58:58 | https://stackoverflow.com/q/63508364 | https://stackoverflow.com/a/63516324 | <p>It seems that the Azure PowerShell task has an issue capturing the exit code from a script file, it works fine with the inline scripts. You can <a href="https://developercommunity.visualstudio.com/content/problem/post.html?space=21" rel="noreferrer">report this problem</a> to Microsoft development team. Hope they wi... | <p>It seems that the Azure PowerShell task has an issue capturing the exit code from a script file, it works fine with the inline scripts. You can <a href="https://developercommunity.visualstudio.com/content/problem/post.html?space=21" rel="noreferrer">report this problem</a> to Microsoft development team. Hope they wi... | 526, 10001, 116537 | azure-devops, powershell, task | <h1>Azure DevOps reports PowerShell task as passed even with non-0 exit code</h1>
<p>In Azure DevOps I have a task to run a PowerShell script. In certain scenarios, the script should exit with a non-0 code, causing the task to be reported as failed. However, Azure DevOps reports the task as passed regardless.</p>
<p>Th... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,715 | bash | # Azure DevOps reports PowerShell task as passed even with non-0 exit code
In Azure DevOps I have a task to run a PowerShell script. In certain scenarios, the script should exit with a non-0 code, causing the task to be reported as failed. However, Azure DevOps reports the task as passed regardless.
This is a problem... | It seems that the Azure PowerShell task has an issue capturing the exit code from a script file, it works fine with the inline scripts. You can [report this problem](https://developercommunity.visualstudio.com/content/problem/post.html?space=21) to Microsoft development team. Hope they will provide a fix soon.
However... |
62367579 | Jshell in intellij doesn't allow generic types | 12 | 2020-06-14 02:00:06 | <p>I just started using jshell in intellij idea community version. When I write the below code in jshell, it works.</p>
<pre><code>List<String> list = List.of("a", "b", "c");
System.out.println(list);
</code></pre>
<p>However the same code doesn't work in intellij. It says "Expression expected". It executes fin... | 1,250 | 13,741,014 | 2020-06-14 11:38:37 | 62,367,608 | 12 | 2020-06-14 02:06:39 | 6,099,347 | 2020-06-14 02:06:39 | https://stackoverflow.com/q/62367579 | https://stackoverflow.com/a/62367608 | <p>Not an IntelliJ IDEA expert but I get my way around by writing a anonymous class:</p>
<pre><code>new Object() {
void method() {
List<String> list = List.of("a", "b", "c");
System.out.println(list);
}
}.method();
</code></pre>
| <p>Not an IntelliJ IDEA expert but I get my way around by writing a anonymous class:</p> <pre><code>new Object() { void method() { List<String> list = List.of("a", "b", "c"); System.out.println(list); } }.method(); </code></pre> | 17, 8945, 116030, 141882 | intellij-idea, java, java-14, jshell | <h1>Jshell in intellij doesn't allow generic types</h1>
<p>I just started using jshell in intellij idea community version. When I write the below code in jshell, it works.</p>
<pre><code>List<String> list = List.of("a", "b", "c");
System.out.println(list);
</code></pre>
<p>However the same code doesn't work in ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,716 | bash | # Jshell in intellij doesn't allow generic types
I just started using jshell in intellij idea community version. When I write the below code in jshell, it works.
```
List<String> list = List.of("a", "b", "c");
System.out.println(list);
```
However the same code doesn't work in intellij. It says "Expression expected"... | Not an IntelliJ IDEA expert but I get my way around by writing a anonymous class:
```
new Object() {
void method() {
List<String> list = List.of("a", "b", "c");
System.out.println(list);
}
}.method();
``` |
41096875 | Programmatically change keyboard layout | 12 | 2016-12-12 08:35:06 | <p>I work in a Swiss company environment with <code>de-CH</code> as the standard keyboard layout, while using a <code>de-DE</code> keyboard.</p>
<p>I'm able to change my keyboard settings manually to the preferred <code>de-DE</code>-layout, set it as standard and and assign a shortcut.</p>
<p>However: somehow my settin... | 37,431 | 5,979,902 | 2025-04-09 21:43:58 | 48,477,139 | 12 | 2018-01-27 15:10:52 | 9,276,816 | 2018-01-27 15:10:52 | https://stackoverflow.com/q/41096875 | https://stackoverflow.com/a/48477139 | <p>Use this command</p>
<pre><code>powershell -command "Set-WinUserLanguageList -Force 'en-US'"
</code></pre>
<p>or</p>
<pre><code>powershell -command "Set-WinUserLanguageList -Force 'fr-FR'"
</code></pre>
| <p>Use this command</p> <pre><code>powershell -command "Set-WinUserLanguageList -Force 'en-US'" </code></pre> <p>or</p> <pre><code>powershell -command "Set-WinUserLanguageList -Force 'fr-FR'" </code></pre> | 526 | powershell | <h1>Programmatically change keyboard layout</h1>
<p>I work in a Swiss company environment with <code>de-CH</code> as the standard keyboard layout, while using a <code>de-DE</code> keyboard.</p>
<p>I'm able to change my keyboard settings manually to the preferred <code>de-DE</code>-layout, set it as standard and and ass... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,717 | bash | # Programmatically change keyboard layout
I work in a Swiss company environment with `de-CH` as the standard keyboard layout, while using a `de-DE` keyboard.
I'm able to change my keyboard settings manually to the preferred `de-DE`-layout, set it as standard and and assign a shortcut.
However: somehow my settings di... | Use this command
```
powershell -command "Set-WinUserLanguageList -Force 'en-US'"
```
or
```
powershell -command "Set-WinUserLanguageList -Force 'fr-FR'"
``` |
45086059 | How can I reference UWP classes in PowerShell | 12 | 2017-07-13 16:12:15 | <p>I want to use a data type from a Universal Windows Platform library, how can I reference the containing namespace or assembly in PowerShell?</p>
<p>For example, I want to use the <a href="https://learn.microsoft.com/en-us/uwp/api/Windows.Data.Json.JsonObject" rel="noreferrer"><code>Windows.Data.Json.JsonObject</cod... | 2,783 | 712,649 | 2017-07-13 16:29:43 | 45,086,380 | 12 | 2017-07-13 16:29:43 | 712,649 | 2017-07-13 16:29:43 | https://stackoverflow.com/q/45086059 | https://stackoverflow.com/a/45086380 | <p>Shortly after posting this question, I stumbled on <a href="https://github.com/Windos/BurntToast/blob/c0abfdac392ace8dd7c28bb0cd46842024aaaf30/BurntToast/Public/Submit-BTNotification.ps1" rel="noreferrer">the GitHub repo for BurntToast</a>, a module that allows raising UWP Toast Notifications from PowerShell, and it... | <p>Shortly after posting this question, I stumbled on <a href="https://github.com/Windos/BurntToast/blob/c0abfdac392ace8dd7c28bb0cd46842024aaaf30/BurntToast/Public/Submit-BTNotification.ps1" rel="noreferrer">the GitHub repo for BurntToast</a>, a module that allows raising UWP Toast Notifications from PowerShell, and it... | 1, 64, 526, 113708 | .net, powershell, uwp, windows | <h1>How can I reference UWP classes in PowerShell</h1>
<p>I want to use a data type from a Universal Windows Platform library, how can I reference the containing namespace or assembly in PowerShell?</p>
<p>For example, I want to use the <a href="https://learn.microsoft.com/en-us/uwp/api/Windows.Data.Json.JsonObject" r... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,718 | bash | # How can I reference UWP classes in PowerShell
I want to use a data type from a Universal Windows Platform library, how can I reference the containing namespace or assembly in PowerShell?
For example, I want to use the [`Windows.Data.Json.JsonObject` class](https://learn.microsoft.com/en-us/uwp/api/Windows.Data.Json... | Shortly after posting this question, I stumbled on [the GitHub repo for BurntToast](https://github.com/Windos/BurntToast/blob/c0abfdac392ace8dd7c28bb0cd46842024aaaf30/BurntToast/Public/Submit-BTNotification.ps1), a module that allows raising UWP Toast Notifications from PowerShell, and it references the WinRT ToastNoti... |
40332945 | Deployment slot specific appsettin in ARM template? | 12 | 2016-10-30 19:50:21 | <p>I'm trying to get into that Visual Studio Resource Group template.
So far it's looking good, and I have added some appsettings for a web app, but my question is, how can I make them deployment slot specific? Is there something in the json for the template or the parameter file?</p>
| 11,665 | 1,105,889 | 2023-12-27 14:59:49 | 40,342,821 | 12 | 2016-10-31 13:07:10 | 7,005,159 | 2016-11-03 01:39:21 | https://stackoverflow.com/q/40332945 | https://stackoverflow.com/a/40342821 | <p>Please have a try to add the json code snipped in the ARM template. I have tested it. It works successfully.</p>
<pre><code> "resources": [
{
"apiVersion": "2015-08-01",
"name": "appsettings",
"type": "config",
"dependsOn": [
"[resourceId('Microsoft.Web/Si... | <p>Please have a try to add the json code snipped in the ARM template. I have tested it. It works successfully.</p> <pre><code> "resources": [ { "apiVersion": "2015-08-01", "name": "appsettings", "type": "config", "dependsOn": [ "[resourceId('Microsoft.Web/Si... | 81879, 108005, 108143, 115276, 119184 | azure-deployment-slots, azure-powershell, azure-resource-group, azure-resource-manager, visual-studio-2015 | <h1>Deployment slot specific appsettin in ARM template?</h1>
<p>I'm trying to get into that Visual Studio Resource Group template.
So far it's looking good, and I have added some appsettings for a web app, but my question is, how can I make them deployment slot specific? Is there something in the json for the template ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,719 | bash | # Deployment slot specific appsettin in ARM template?
I'm trying to get into that Visual Studio Resource Group template.
So far it's looking good, and I have added some appsettings for a web app, but my question is, how can I make them deployment slot specific? Is there something in the json for the template or the pa... | Please have a try to add the json code snipped in the ARM template. I have tested it. It works successfully.
```
"resources": [
{
"apiVersion": "2015-08-01",
"name": "appsettings",
"type": "config",
"dependsOn": [
"[resourceId('Microsoft.Web/Sites/Slots', va... |
38705320 | Multiple commands within ScriptBlock | 12 | 2016-08-01 18:02:31 | <p>I'm having trouble running multiple commands within a Scriptblock parameter. All documentation points towards using a semicolon for separation between cmdlets. Using the same methodology of separating cmdlets via a semicolon works on my local machine, but not on a remote machine through invoke-command. </p>
<p>F... | 44,938 | 5,405,559 | 2022-11-14 01:46:24 | 38,705,532 | 12 | 2016-08-01 18:18:15 | 3,905,079 | 2022-11-14 01:46:24 | https://stackoverflow.com/q/38705320 | https://stackoverflow.com/a/38705532 | <p>I am able to reproduce this.. it only returns the first statement. It's not the semicolon, it does the same thing if you use line breaks.</p>
<p>These options work:</p>
<pre><code>Invoke-Command -ComputerName computer -ScriptBlock {
(Get-Service)
Get-Process
}
</code></pre>
<p>Or this curiously:</p>
<pre><co... | <p>I am able to reproduce this.. it only returns the first statement. It's not the semicolon, it does the same thing if you use line breaks.</p> <p>These options work:</p> <pre><code>Invoke-Command -ComputerName computer -ScriptBlock { (Get-Service) Get-Process } </code></pre> <p>Or this curiously:</p> <pre><co... | 526, 43391 | invoke-command, powershell | <h1>Multiple commands within ScriptBlock</h1>
<p>I'm having trouble running multiple commands within a Scriptblock parameter. All documentation points towards using a semicolon for separation between cmdlets. Using the same methodology of separating cmdlets via a semicolon works on my local machine, but not on a remo... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,720 | bash | # Multiple commands within ScriptBlock
I'm having trouble running multiple commands within a Scriptblock parameter. All documentation points towards using a semicolon for separation between cmdlets. Using the same methodology of separating cmdlets via a semicolon works on my local machine, but not on a remote machine ... | I am able to reproduce this.. it only returns the first statement. It's not the semicolon, it does the same thing if you use line breaks.
These options work:
```
Invoke-Command -ComputerName computer -ScriptBlock {
(Get-Service)
Get-Process
}
```
Or this curiously:
```
Invoke-Command -ComputerName computer ... |
38697974 | How to append line to empty file using sed, but not echo? | 12 | 2016-08-01 11:42:27 | <p>I have the following problem: in a script, that must not be executed as root, I have to write a line to a newly created, empty file. This file is in /etc, so I need elevated privilages to write to it.</p>
<p>Creating the file is simple:</p>
<pre><code>sudo touch /etc/myfile
</code></pre>
<p>Now, just using echo t... | 10,415 | 3,617,426 | 2020-08-26 19:27:01 | 38,698,093 | 12 | 2016-08-01 11:48:41 | 1,983,854 | 2016-08-01 11:54:04 | https://stackoverflow.com/q/38697974 | https://stackoverflow.com/a/38698093 | <p>You can use <code>tee</code>:</p>
<pre><code>echo "something" | sudo tee /etc/myfile # tee -a to append
</code></pre>
<p>Or redirect to <code>/dev/null</code> if you don't want to see the output:</p>
<pre><code>echo "something" | sudo tee /etc/myfile > /dev/null
</code></pre>
<p>Another option is to use <co... | <p>You can use <code>tee</code>:</p> <pre><code>echo "something" | sudo tee /etc/myfile # tee -a to append </code></pre> <p>Or redirect to <code>/dev/null</code> if you don't want to see the output:</p> <pre><code>echo "something" | sudo tee /etc/myfile > /dev/null </code></pre> <p>Another option is to use <co... | 387, 390, 1674, 5282, 13824 | bash, echo, sed, shell, sudo | <h1>How to append line to empty file using sed, but not echo?</h1>
<p>I have the following problem: in a script, that must not be executed as root, I have to write a line to a newly created, empty file. This file is in /etc, so I need elevated privilages to write to it.</p>
<p>Creating the file is simple:</p>
<pre><c... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,721 | bash | # How to append line to empty file using sed, but not echo?
I have the following problem: in a script, that must not be executed as root, I have to write a line to a newly created, empty file. This file is in /etc, so I need elevated privilages to write to it.
Creating the file is simple:
```
sudo touch /etc/myfile
... | You can use `tee`:
```
echo "something" | sudo tee /etc/myfile # tee -a to append
```
Or redirect to `/dev/null` if you don't want to see the output:
```
echo "something" | sudo tee /etc/myfile > /dev/null
```
Another option is to use `sh -c` to perform the full command under sudo:
```
sudo sh -c 'echo "somethin... |
37935415 | Bash regex string variable match | 12 | 2016-06-21 04:08:22 | <p>I have the following script i wrote in perl that works just fine. But i am trying to achieve the same thing using bash.</p>
<pre><code>#!/usr/bin/perl
use 5.010;
use strict;
INIT {
my $string = 'Seconds_Behind_Master: 1';
my ($s) = ($string =~ /Seconds_Behind_Master: ([\d]+)/);
if ($s > 10) {
... | 48,634 | 2,105,790 | 2021-04-17 00:56:55 | 37,935,476 | 12 | 2016-06-21 04:13:42 | 48,382 | 2016-06-21 05:09:46 | https://stackoverflow.com/q/37935415 | https://stackoverflow.com/a/37935476 | <p>You can use a tool for it e.g. <code>sed</code> if you want to stay with regexps:</p>
<pre><code>#!/bin/sh
string="Seconds_Behind_Master: 1"
s=`echo $string | sed -r 's/Seconds_Behind_Master: ([0-9]+)/\1/g'`
if [ $s -gt 10 ]
then
echo "Too long... $s"
else
echo "It's OK"
fi
</code></pre>
| <p>You can use a tool for it e.g. <code>sed</code> if you want to stay with regexps:</p> <pre><code>#!/bin/sh string="Seconds_Behind_Master: 1" s=`echo $string | sed -r 's/Seconds_Behind_Master: ([0-9]+)/\1/g'` if [ $s -gt 10 ] then echo "Too long... $s" else echo "It's OK" fi </code></pre> | 18, 387, 580 | bash, perl, regex | <h1>Bash regex string variable match</h1>
<p>I have the following script i wrote in perl that works just fine. But i am trying to achieve the same thing using bash.</p>
<pre><code>#!/usr/bin/perl
use 5.010;
use strict;
INIT {
my $string = 'Seconds_Behind_Master: 1';
my ($s) = ($string =~ /Seconds_Behind_Maste... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,722 | bash | # Bash regex string variable match
I have the following script i wrote in perl that works just fine. But i am trying to achieve the same thing using bash.
```
#!/usr/bin/perl
use 5.010;
use strict;
INIT {
my $string = 'Seconds_Behind_Master: 1';
my ($s) = ($string =~ /Seconds_Behind_Master: ([\d]+)/);
i... | You can use a tool for it e.g. `sed` if you want to stay with regexps:
```
#!/bin/sh
string="Seconds_Behind_Master: 1"
s=`echo $string | sed -r 's/Seconds_Behind_Master: ([0-9]+)/\1/g'`
if [ $s -gt 10 ]
then
echo "Too long... $s"
else
echo "It's OK"
fi
``` |
33460595 | Fatal: bad numeric config value for 'core.sharedrepository' in .git/config : invalid unit (in Git Bash) | 12 | 2015-11-01 08:58:03 | <p>On performing :</p>
<pre><code>$ git push -u origin --all
</code></pre>
<p>I got an error: </p>
<pre><code>remote: error: insufficient permission for adding an object to repository database ./objects
</code></pre>
<p>I googled, and find out a solution by <a href="https://stackoverflow.com/questions/6448242/git-p... | 5,748 | 4,357,799 | 2015-11-01 09:31:14 | 33,460,604 | 12 | 2015-11-01 08:59:00 | 6,309 | 2015-11-01 09:31:14 | https://stackoverflow.com/q/33460595 | https://stackoverflow.com/a/33460604 | <blockquote>
<p>I thought I have to enter name of group in the actual command</p>
</blockquote>
<p>No: <code>dev</code> is simply not a valid value for that setting.</p>
<p>Try '<code>group</code>' only.</p>
<pre><code>git config core.sharedRepository group
</code></pre>
<p>If you need to modify manually the conf... | <blockquote> <p>I thought I have to enter name of group in the actual command</p> </blockquote> <p>No: <code>dev</code> is simply not a valid value for that setting.</p> <p>Try '<code>group</code>' only.</p> <pre><code>git config core.sharedRepository group </code></pre> <p>If you need to modify manually the conf... | 119, 3574, 61874 | config, git, git-bash | <h1>Fatal: bad numeric config value for 'core.sharedrepository' in .git/config : invalid unit (in Git Bash)</h1>
<p>On performing :</p>
<pre><code>$ git push -u origin --all
</code></pre>
<p>I got an error: </p>
<pre><code>remote: error: insufficient permission for adding an object to repository database ./objects
<... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,723 | bash | # Fatal: bad numeric config value for 'core.sharedrepository' in .git/config : invalid unit (in Git Bash)
On performing :
```
$ git push -u origin --all
```
I got an error:
```
remote: error: insufficient permission for adding an object to repository database ./objects
```
I googled, and find out a solution by [Ri... | > I thought I have to enter name of group in the actual command
No: `dev` is simply not a valid value for that setting.
Try '`group`' only.
```
git config core.sharedRepository group
```
If you need to modify manually the config, make sure to look for the `.git/config` file in your *local* cloned repo (not on the s... |
30524456 | PowerShell quotes for Start-Process ArgumentList | 12 | 2015-05-29 08:11:20 | <p>I'm trying to have the app <a href="http://www.eonet.ne.jp/%7Egakana/tablacus/explorer_en.html" rel="nofollow noreferrer">tablacus explorer</a> open a folder path. This works fine with the following formatting:</p>
<pre><code>$exe = 'S:\Tools\explorer\TE64.exe'
Start-Process $exe -ArgumentList '"Tabs,Close othe... | 21,622 | 2,304,170 | 2023-11-10 07:29:02 | 30,524,642 | 12 | 2015-05-29 08:21:28 | 2,304,170 | 2023-11-10 07:27:13 | https://stackoverflow.com/q/30524456 | https://stackoverflow.com/a/30524642 | <p>I found two solutions for this on the <a href="https://social.technet.microsoft.com/Forums/en-US/455837c4-44a5-4359-b179-02f6b6f4d95b/using-double-quotes-within-a-string?forum=winserverpowershell" rel="nofollow noreferrer">MS Blog</a>:</p>
<pre><code>$Args = @"
"Tabs,Close other tabs" "Open,$dir&... | <p>I found two solutions for this on the <a href="https://social.technet.microsoft.com/Forums/en-US/455837c4-44a5-4359-b179-02f6b6f4d95b/using-double-quotes-within-a-string?forum=winserverpowershell" rel="nofollow noreferrer">MS Blog</a>:</p> <pre><code>$Args = @" "Tabs,Close other tabs" "Open,$dir&... | 430, 526 | powershell, quotes | <h1>PowerShell quotes for Start-Process ArgumentList</h1>
<p>I'm trying to have the app <a href="http://www.eonet.ne.jp/%7Egakana/tablacus/explorer_en.html" rel="nofollow noreferrer">tablacus explorer</a> open a folder path. This works fine with the following formatting:</p>
<pre><code>$exe = 'S:\Tools\explorer\TE64.ex... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,724 | bash | # PowerShell quotes for Start-Process ArgumentList
I'm trying to have the app [tablacus explorer](http://www.eonet.ne.jp/%7Egakana/tablacus/explorer_en.html) open a folder path. This works fine with the following formatting:
```
$exe = 'S:\Tools\explorer\TE64.exe'
Start-Process $exe -ArgumentList '"Tabs,Close other t... | I found two solutions for this on the [MS Blog](https://social.technet.microsoft.com/Forums/en-US/455837c4-44a5-4359-b179-02f6b6f4d95b/using-double-quotes-within-a-string?forum=winserverpowershell):
```
$Args = @"
"Tabs,Close other tabs" "Open,$dir"
"@
Start-Process $exe -ArgumentList $Args
```
or
```
Start-Pro... |
28204622 | Possible to change tab completion behavior in fish shell? | 12 | 2015-01-28 23:50:04 | <p><strong>Update</strong>: <strong>This complaint relates to an old version of fish -- see the below comment from one of the fish developers describing the awesome improvements to the fish pager behavior which nullified this complaint.</strong></p>
<p>The fish shell is pretty cool -- however I hate one of the feature... | 6,072 | 2,619,765 | 2015-11-25 23:51:32 | 28,207,051 | 12 | 2015-01-29 04:32:25 | 1,441,328 | 2015-01-29 04:32:25 | https://stackoverflow.com/q/28204622 | https://stackoverflow.com/a/28207051 | <p>I commend you for writing up this detailed and thoughtful post, and it deserves an equally detailed and thoughtful response!</p>
<p>The tab completion behavior has been rewritten in fish top-of-tree (not yet released), and is referred to as the "new pager." You can see the design goals and discussion <a href="https... | <p>I commend you for writing up this detailed and thoughtful post, and it deserves an equally detailed and thoughtful response!</p> <p>The tab completion behavior has been rewritten in fish top-of-tree (not yet released), and is referred to as the "new pager." You can see the design goals and discussion <a href="https... | 387, 390, 1177, 55824 | bash, fish, shell, tabs | <h1>Possible to change tab completion behavior in fish shell?</h1>
<p><strong>Update</strong>: <strong>This complaint relates to an old version of fish -- see the below comment from one of the fish developers describing the awesome improvements to the fish pager behavior which nullified this complaint.</strong></p>
<p... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,725 | bash | # Possible to change tab completion behavior in fish shell?
**Update**: **This complaint relates to an old version of fish -- see the below comment from one of the fish developers describing the awesome improvements to the fish pager behavior which nullified this complaint.**
The fish shell is pretty cool -- however ... | I commend you for writing up this detailed and thoughtful post, and it deserves an equally detailed and thoughtful response!
The tab completion behavior has been rewritten in fish top-of-tree (not yet released), and is referred to as the "new pager." You can see the design goals and discussion [here](https://github.co... |
26187170 | Difference between \n and \r in expect? | 12 | 2014-10-03 21:37:33 | <p>In this particular script they use <code>\n</code>.</p>
<pre><code>#!/usr/bin/expect
set password [lindex $argv 0]
spawn asadmin enable-secure-admin
expect "admin"
send "admin\n"
expect "password"
send "$password\n"
expect eof
exit
</code></pre>
<p><strong>Question</strong></p>
<p>Could <code>\r</code> just as ... | 12,135 | 3,293,148 | 2014-10-03 21:59:19 | 26,187,389 | 12 | 2014-10-03 21:59:19 | 13,317 | 2014-10-03 21:59:19 | https://stackoverflow.com/q/26187170 | https://stackoverflow.com/a/26187389 | <p><code>\n</code> is linefeed, Ctrl-J or character 012. <code>\r</code> is carriage return, Ctrl-M or character 015.</p>
<p>In an interactive unix context, when you're typing them (or simulating typing them, as with expect), they are interchangeable. Linefeed is the formal line-terminator character, but tty devices n... | <p><code>\n</code> is linefeed, Ctrl-J or character 012. <code>\r</code> is carriage return, Ctrl-M or character 015.</p> <p>In an interactive unix context, when you're typing them (or simulating typing them, as with expect), they are interchangeable. Linefeed is the formal line-terminator character, but tty devices n... | 58, 387, 9048 | bash, expect, linux | <h1>Difference between \n and \r in expect?</h1>
<p>In this particular script they use <code>\n</code>.</p>
<pre><code>#!/usr/bin/expect
set password [lindex $argv 0]
spawn asadmin enable-secure-admin
expect "admin"
send "admin\n"
expect "password"
send "$password\n"
expect eof
exit
</code></pre>
<p><strong>Questio... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,726 | bash | # Difference between \n and \r in expect?
In this particular script they use `\n`.
```
#!/usr/bin/expect
set password [lindex $argv 0]
spawn asadmin enable-secure-admin
expect "admin"
send "admin\n"
expect "password"
send "$password\n"
expect eof
exit
```
**Question**
Could `\r` just as well have been used? If no... | `\n` is linefeed, Ctrl-J or character 012. `\r` is carriage return, Ctrl-M or character 015.
In an interactive unix context, when you're typing them (or simulating typing them, as with expect), they are interchangeable. Linefeed is the formal line-terminator character, but tty devices normally translate carriage retur... |
24374784 | Backslashes in Powershell | 12 | 2014-06-23 20:29:26 | <p>Why does the string for the -split parameter require two backslashes while the string for the -join parameter requires only one backslash? The backtick is the escape character in Powershell. What does a backslash preceding a character do for you?</p>
<pre><code>$path = 'C:\folder\test\unit1\testing\results\report.t... | 14,210 | 447,901 | 2014-06-24 01:56:27 | 24,374,828 | 12 | 2014-06-23 20:32:32 | 153,982 | 2014-06-24 01:56:27 | https://stackoverflow.com/q/24374784 | https://stackoverflow.com/a/24374828 | <p><code>-split</code> splits on a regex by default. So it is the regex that requires escaping a backslash. You can tell PowerShell not to use a regex like so:</p>
<pre><code>$path -split '\',-1,'SimpleMatch'
</code></pre>
<p><code>-join</code> is just taking whatever characters you supply to use as the delimiter to... | <p><code>-split</code> splits on a regex by default. So it is the regex that requires escaping a backslash. You can tell PowerShell not to use a regex like so:</p> <pre><code>$path -split '\',-1,'SimpleMatch' </code></pre> <p><code>-join</code> is just taking whatever characters you supply to use as the delimiter to... | 64, 526, 10804 | powershell, quoting, windows | <h1>Backslashes in Powershell</h1>
<p>Why does the string for the -split parameter require two backslashes while the string for the -join parameter requires only one backslash? The backtick is the escape character in Powershell. What does a backslash preceding a character do for you?</p>
<pre><code>$path = 'C:\folder\... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,727 | bash | # Backslashes in Powershell
Why does the string for the -split parameter require two backslashes while the string for the -join parameter requires only one backslash? The backtick is the escape character in Powershell. What does a backslash preceding a character do for you?
```
$path = 'C:\folder\test\unit1\testing\r... | `-split` splits on a regex by default. So it is the regex that requires escaping a backslash. You can tell PowerShell not to use a regex like so:
```
$path -split '\',-1,'SimpleMatch'
```
`-join` is just taking whatever characters you supply to use as the delimiter to stick between the strings being joined. |
23424783 | OSTYPE not available in shell script | 12 | 2014-05-02 09:22:54 | <p>Currently I'm setting up a new system using the new Xubuntu trusty tahr.
I'm not very familiar with shell scripting, but I have one which needs the OSTYPE environment variable to determine what to do.</p>
<p>If I call <code>echo $OSTYPE</code> in the xfce-terminal I get succesfully <code>linux-gnu</code>.</p>
<p>I... | 9,858 | 651,601 | 2019-05-14 07:08:49 | 23,425,163 | 12 | 2014-05-02 09:45:29 | 2,199,765 | 2017-03-23 12:02:39 | https://stackoverflow.com/q/23424783 | https://stackoverflow.com/a/23425163 | <p>The <code>OSTYPE</code> environment variable is not recognized by the original Bourne shell, which is what is being invoked by the first line of your script. </p>
<p>Replace it with:</p>
<pre><code>#!/bin/bash
</code></pre>
<p>or</p>
<pre><code>#!/bin/ksh
</code></pre>
<p>as appropriate to your setup.</p>
| <p>The <code>OSTYPE</code> environment variable is not recognized by the original Bourne shell, which is what is being invoked by the first line of your script. </p> <p>Replace it with:</p> <pre><code>#!/bin/bash </code></pre> <p>or</p> <pre><code>#!/bin/ksh </code></pre> <p>as appropriate to your setup.</p> | 58, 390, 9013, 10327, 103312 | environment-variables, linux, sh, shell, ubuntu-14.04 | <h1>OSTYPE not available in shell script</h1>
<p>Currently I'm setting up a new system using the new Xubuntu trusty tahr.
I'm not very familiar with shell scripting, but I have one which needs the OSTYPE environment variable to determine what to do.</p>
<p>If I call <code>echo $OSTYPE</code> in the xfce-terminal I get... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,728 | bash | # OSTYPE not available in shell script
Currently I'm setting up a new system using the new Xubuntu trusty tahr.
I'm not very familiar with shell scripting, but I have one which needs the OSTYPE environment variable to determine what to do.
If I call `echo $OSTYPE` in the xfce-terminal I get succesfully `linux-gnu`.
... | The `OSTYPE` environment variable is not recognized by the original Bourne shell, which is what is being invoked by the first line of your script.
Replace it with:
```
#!/bin/bash
```
or
```
#!/bin/ksh
```
as appropriate to your setup. |
22863783 | bash script - can't get for loop working | 12 | 2014-04-04 13:08:57 | <p><strong>Background Info:</strong></p>
<p>I'm trying to follow the example posted here: <a href="http://www.cyberciti.biz/faq/bash-for-loop/" rel="noreferrer">http://www.cyberciti.biz/faq/bash-for-loop/</a>
I would like loop 9 times using a control variable called "i". </p>
<p><strong>Problem Description</strong><... | 14,403 | 1,078,009 | 2016-04-22 23:18:06 | 22,863,926 | 12 | 2014-04-04 13:16:10 | 1,364,218 | 2016-04-22 23:18:06 | https://stackoverflow.com/q/22863783 | https://stackoverflow.com/a/22863926 | <p>Ubuntu's default shell is <code>dash</code>, which doesn't recognise either of the bashisms (brace expansion, C-style for loop) you tried. Try running your script using <code>bash</code> explicitly:</p>
<pre><code>bash myscript.sh
</code></pre>
<p>or by setting the shebang to <code>#!/bin/bash</code>. Make sure NO... | <p>Ubuntu's default shell is <code>dash</code>, which doesn't recognise either of the bashisms (brace expansion, C-style for loop) you tried. Try running your script using <code>bash</code> explicitly:</p> <pre><code>bash myscript.sh </code></pre> <p>or by setting the shebang to <code>#!/bin/bash</code>. Make sure NO... | 58, 387, 2531 | bash, for-loop, linux | <h1>bash script - can't get for loop working</h1>
<p><strong>Background Info:</strong></p>
<p>I'm trying to follow the example posted here: <a href="http://www.cyberciti.biz/faq/bash-for-loop/" rel="noreferrer">http://www.cyberciti.biz/faq/bash-for-loop/</a>
I would like loop 9 times using a control variable called "... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,729 | bash | # bash script - can't get for loop working
**Background Info:**
I'm trying to follow the example posted here: <http://www.cyberciti.biz/faq/bash-for-loop/>
I would like loop 9 times using a control variable called "i".
**Problem Description**
My code looks like this:
```
for i in {0..8..1}
do
echo "i is $i"
tm... | Ubuntu's default shell is `dash`, which doesn't recognise either of the bashisms (brace expansion, C-style for loop) you tried. Try running your script using `bash` explicitly:
```
bash myscript.sh
```
or by setting the shebang to `#!/bin/bash`. Make sure NOT to run the script with `sh myscript.sh`.
dash should work... |
22380733 | How to write a text file with color | 12 | 2014-03-13 13:52:31 | <p>I'm trying to write a text file with two colors depending on the output. I using the <code>echo -e</code> command as I would when printing with colors in the console, like this:</p>
<pre><code>RETURNED=$?
if [ $RETURNED == 0 ]
then
echo -e "\e[1;32mffmpeg -t $DURACION -f x11grab -s $RESOLUCION -r ${FPS[j]}... | 16,623 | 3,364,845 | 2020-06-11 15:37:20 | 22,382,293 | 12 | 2014-03-13 14:48:22 | 96,588 | 2014-03-13 22:16:11 | https://stackoverflow.com/q/22380733 | https://stackoverflow.com/a/22382293 | <p>Have you tried <code>less -R file.txt</code>? That should show you the colour (works for me at least).</p>
<p>If you want colour coding which is supported by non-shell applications your best bet is probably to output HTML, for example:</p>
<pre><code>printf '<code style="color: %s;">%s</code>' "green" ... | <p>Have you tried <code>less -R file.txt</code>? That should show you the colour (works for me at least).</p> <p>If you want colour coding which is supported by non-shell applications your best bet is probably to output HTML, for example:</p> <pre><code>printf '<code style="color: %s;">%s</code>' "green" ... | 387 | bash | <h1>How to write a text file with color</h1>
<p>I'm trying to write a text file with two colors depending on the output. I using the <code>echo -e</code> command as I would when printing with colors in the console, like this:</p>
<pre><code>RETURNED=$?
if [ $RETURNED == 0 ]
then
echo -e "\e[1;32mffmpeg -t $DU... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,730 | bash | # How to write a text file with color
I'm trying to write a text file with two colors depending on the output. I using the `echo -e` command as I would when printing with colors in the console, like this:
```
RETURNED=$?
if [ $RETURNED == 0 ]
then
echo -e "\e[1;32mffmpeg -t $DURACION -f x11grab -s $RESOLUCIO... | Have you tried `less -R file.txt`? That should show you the colour (works for me at least).
If you want colour coding which is supported by non-shell applications your best bet is probably to output HTML, for example:
```
printf '<code style="color: %s;">%s</code>' "green" "ffmpeg -t $DURACION -f x11grab -s $RESOLUCI... |
20520303 | Get Azure VM Detail by PowerShell | 12 | 2013-12-11 13:21:53 | <p>I am trying to run <code>Get-AzureVM</code> PowerShell command, it is running fine but not return any output. </p>
<p>Also tried in following flavor but still blank result any idea?</p>
<pre><code>Get-AzureVM -Name "vmname" |Select-Object name,instancesize,location
</code></pre>
| 23,905 | 2,940,180 | 2017-02-07 13:48:21 | 20,521,167 | 12 | 2013-12-11 14:02:15 | 3,015,576 | 2015-03-17 02:25:45 | https://stackoverflow.com/q/20520303 | https://stackoverflow.com/a/20521167 | <p>You should call <code>Select-AzureSubscription "subscription name"</code> first.</p>
<p>It likely is defaulting to a subscription that doesn't have any virtual machines in it. </p>
<p>To view your current subscription names call:</p>
<pre><code>Get-AzureSubscription | select SubscriptionName
</code></pre>
| <p>You should call <code>Select-AzureSubscription "subscription name"</code> first.</p> <p>It likely is defaulting to a subscription that doesn't have any virtual machines in it. </p> <p>To view your current subscription names call:</p> <pre><code>Get-AzureSubscription | select SubscriptionName </code></pre> | 526, 14158, 73157 | azure, powershell, powershell-3.0 | <h1>Get Azure VM Detail by PowerShell</h1>
<p>I am trying to run <code>Get-AzureVM</code> PowerShell command, it is running fine but not return any output. </p>
<p>Also tried in following flavor but still blank result any idea?</p>
<pre><code>Get-AzureVM -Name "vmname" |Select-Object name,instancesize,location
</code... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,731 | bash | # Get Azure VM Detail by PowerShell
I am trying to run `Get-AzureVM` PowerShell command, it is running fine but not return any output.
Also tried in following flavor but still blank result any idea?
```
Get-AzureVM -Name "vmname" |Select-Object name,instancesize,location
``` | You should call `Select-AzureSubscription "subscription name"` first.
It likely is defaulting to a subscription that doesn't have any virtual machines in it.
To view your current subscription names call:
```
Get-AzureSubscription | select SubscriptionName
``` |
17272968 | Escaping characters in variables inside sed expression | 12 | 2013-06-24 10:12:17 | <p>So im having an issue where this portion of my script is not working. I'm not sure exactly whats going on, but I get the feeling its because I have not escaped certain characters inside the variables. I tried the following with no luck:</p>
<pre><code>crontab -l | sed "s%$CTMP%\*\/$FREQ \* \* \* \* cd $DIR &&am... | 18,124 | 2,272,450 | 2013-06-24 11:05:39 | 17,273,270 | 12 | 2013-06-24 10:28:06 | 1,258,041 | 2013-06-24 10:58:37 | https://stackoverflow.com/q/17272968 | https://stackoverflow.com/a/17273270 | <p>Yes, the problem is likely that <code>$CTMP</code> contains asterisks, which are interpreted by <code>sed</code> as quantifiers. <code>.</code> is also a special character. Try escaping them:</p>
<pre><code>CTMP_ESC=$(sed 's/[\*\.]/\\&/g' <<<"$CTMP")
</code></pre>
<p>and then use <code>CTMP_ESC</code>... | <p>Yes, the problem is likely that <code>$CTMP</code> contains asterisks, which are interpreted by <code>sed</code> as quantifiers. <code>.</code> is also a special character. Try escaping them:</p> <pre><code>CTMP_ESC=$(sed 's/[\*\.]/\\&/g' <<<"$CTMP") </code></pre> <p>and then use <code>CTMP_ESC</code>... | 387, 5282 | bash, sed | <h1>Escaping characters in variables inside sed expression</h1>
<p>So im having an issue where this portion of my script is not working. I'm not sure exactly whats going on, but I get the feeling its because I have not escaped certain characters inside the variables. I tried the following with no luck:</p>
<pre><code>... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,732 | bash | # Escaping characters in variables inside sed expression
So im having an issue where this portion of my script is not working. I'm not sure exactly whats going on, but I get the feeling its because I have not escaped certain characters inside the variables. I tried the following with no luck:
```
crontab -l | sed "s%... | Yes, the problem is likely that `$CTMP` contains asterisks, which are interpreted by `sed` as quantifiers. `.` is also a special character. Try escaping them:
```
CTMP_ESC=$(sed 's/[\*\.]/\\&/g' <<<"$CTMP")
```
and then use `CTMP_ESC` instead of `CTMP`.
Also, you don't need to escape `/` in your `sed` command, becau... |
14275224 | Exit after trap fires | 12 | 2013-01-11 09:35:03 | <p>Take this script</p>
<pre class="lang-sh prettyprint-override"><code>#!/bin/sh
fd ()
{
echo Hello world
exit
}
trap fd EXIT INT
for g in {1..5}
do
echo foo
sleep 1
done
</code></pre>
<p>I would like <code>fd</code> to fire once, either from Control-C or if the script exits normally. However if you hit C... | 1,468 | 1,002,260 | 2017-04-06 11:01:13 | 14,275,357 | 12 | 2013-01-11 09:42:41 | 874,188 | 2013-01-11 11:00:23 | https://stackoverflow.com/q/14275224 | https://stackoverflow.com/a/14275357 | <p>Do cascading traps. <code>exit 127</code> will run the <code>EXIT</code> trap and set the exit code to 127, so you can say</p>
<pre><code>#!/bin/sh
fd () {
echo Hello world
# No explicit exit here!
}
trap fd EXIT
trap 'exit 127' INT
</code></pre>
<p>I remember learning this from other people's scripts after ... | <p>Do cascading traps. <code>exit 127</code> will run the <code>EXIT</code> trap and set the exit code to 127, so you can say</p> <pre><code>#!/bin/sh fd () { echo Hello world # No explicit exit here! } trap fd EXIT trap 'exit 127' INT </code></pre> <p>I remember learning this from other people's scripts after ... | 387, 124723 | bash, shell-trap | <h1>Exit after trap fires</h1>
<p>Take this script</p>
<pre class="lang-sh prettyprint-override"><code>#!/bin/sh
fd ()
{
echo Hello world
exit
}
trap fd EXIT INT
for g in {1..5}
do
echo foo
sleep 1
done
</code></pre>
<p>I would like <code>fd</code> to fire once, either from Control-C or if the script exits... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,733 | bash | # Exit after trap fires
Take this script
```
#!/bin/sh
fd ()
{
echo Hello world
exit
}
trap fd EXIT INT
for g in {1..5}
do
echo foo
sleep 1
done
```
I would like `fd` to fire once, either from Control-C or if the script exits normally. However if you hit Control-C it will run twice. How can I fix this? | Do cascading traps. `exit 127` will run the `EXIT` trap and set the exit code to 127, so you can say
```
#!/bin/sh
fd () {
echo Hello world
# No explicit exit here!
}
trap fd EXIT
trap 'exit 127' INT
```
I remember learning this from other people's scripts after struggling with various workarounds to your probl... |
13010420 | Bash ignore error and get return code | 12 | 2012-10-22 11:23:45 | <p>I am using <code>set -e</code> to abort on errors. </p>
<p>But for particular one function I want to ignore error and on error I want return code of the function. </p>
<p>Example:</p>
<pre><code>do_work || true
if [ $? -ne 0 ]
then
echo "Error"
fi
</code></pre>
<p>But it is not work return code is al... | 9,278 | 428,705 | 2015-08-18 22:41:26 | 13,014,483 | 12 | 2012-10-22 15:17:26 | 89,817 | 2012-10-22 15:17:26 | https://stackoverflow.com/q/13010420 | https://stackoverflow.com/a/13014483 | <pre><code>do_work || {
status=$?
echo "Error"
}
</code></pre>
| <pre><code>do_work || { status=$? echo "Error" } </code></pre> | 387 | bash | <h1>Bash ignore error and get return code</h1>
<p>I am using <code>set -e</code> to abort on errors. </p>
<p>But for particular one function I want to ignore error and on error I want return code of the function. </p>
<p>Example:</p>
<pre><code>do_work || true
if [ $? -ne 0 ]
then
echo "Error"
fi
</code>... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,734 | bash | # Bash ignore error and get return code
I am using `set -e` to abort on errors.
But for particular one function I want to ignore error and on error I want return code of the function.
Example:
```
do_work || true
if [ $? -ne 0 ]
then
echo "Error"
fi
```
But it is not work return code is always true due |... | ```
do_work || {
status=$?
echo "Error"
}
``` |
12060557 | Solution to error 'find: missing argument to -exec' with find -exec cp {} TARGET_DIR + | 12 | 2012-08-21 18:06:30 | <p>I was getting ready to post this as a question, but after fiddling around with it a little longer, I found the solution. So I thought I would go ahead and post it here in case it helps someone else.</p>
<p>I had trouble with find -exec cmd +. I got the error: </p>
<pre><code>$ find ./ -name "*JIM*" -exec cp {} $... | 8,962 | 1,303,577 | 2012-08-21 18:10:24 | 12,060,558 | 12 | 2012-08-21 18:06:30 | 1,303,577 | 2012-08-21 18:10:24 | https://stackoverflow.com/q/12060557 | https://stackoverflow.com/a/12060558 | <p>As mentioned in the opening post, the solution I found is:</p>
<pre><code>$ find ./ -name "*JIM*" -exec cp --target-directory=$TARGET_DIR {} +
</code></pre>
<p>Where <code>--target-directory=</code> could also be replaced with <code>-t</code></p>
| <p>As mentioned in the opening post, the solution I found is:</p> <pre><code>$ find ./ -name "*JIM*" -exec cp --target-directory=$TARGET_DIR {} + </code></pre> <p>Where <code>--target-directory=</code> could also be replaced with <code>-t</code></p> | 387, 2313, 7932, 10193, 25299 | arguments, bash, cp, exec, find | <h1>Solution to error 'find: missing argument to -exec' with find -exec cp {} TARGET_DIR +</h1>
<p>I was getting ready to post this as a question, but after fiddling around with it a little longer, I found the solution. So I thought I would go ahead and post it here in case it helps someone else.</p>
<p>I had trouble... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,735 | bash | # Solution to error 'find: missing argument to -exec' with find -exec cp {} TARGET_DIR +
I was getting ready to post this as a question, but after fiddling around with it a little longer, I found the solution. So I thought I would go ahead and post it here in case it helps someone else.
I had trouble with find -exec ... | As mentioned in the opening post, the solution I found is:
```
$ find ./ -name "*JIM*" -exec cp --target-directory=$TARGET_DIR {} +
```
Where `--target-directory=` could also be replaced with `-t` |
11049748 | How to cut multiple columns from several files and print the output to different files | 12 | 2012-06-15 11:22:32 | <p>I have several files and I only want to take specific columns from it. At the moment, I am using the following code:</p>
<pre><code>$cut -f 1,2,5 AD0062-C.vcf > cutAD0062.txt
</code></pre>
<p>However, to speed up the process I was wondering if I could cut the same columns (fields 1,2,5) in multiple files and th... | 49,884 | 1,458,512 | 2017-12-13 05:03:43 | 11,049,831 | 12 | 2012-06-15 11:27:39 | 348,785 | 2012-06-15 11:27:39 | https://stackoverflow.com/q/11049748 | https://stackoverflow.com/a/11049831 | <p>You can write a for...loop:</p>
<pre><code>for i in AD*-C.vcf
do
cut -f 1,2,5 $i > cut${i%-C.vcf}.txt
done
</code></pre>
| <p>You can write a for...loop:</p> <pre><code>for i in AD*-C.vcf do cut -f 1,2,5 $i > cut${i%-C.vcf}.txt done </code></pre> | 34, 58, 390, 4257 | cut, linux, shell, unix | <h1>How to cut multiple columns from several files and print the output to different files</h1>
<p>I have several files and I only want to take specific columns from it. At the moment, I am using the following code:</p>
<pre><code>$cut -f 1,2,5 AD0062-C.vcf > cutAD0062.txt
</code></pre>
<p>However, to speed up the... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,736 | bash | # How to cut multiple columns from several files and print the output to different files
I have several files and I only want to take specific columns from it. At the moment, I am using the following code:
```
$cut -f 1,2,5 AD0062-C.vcf > cutAD0062.txt
```
However, to speed up the process I was wondering if I could ... | You can write a for...loop:
```
for i in AD*-C.vcf
do
cut -f 1,2,5 $i > cut${i%-C.vcf}.txt
done
``` |
9529791 | set multiple variables from one awk command? | 12 | 2012-03-02 07:52:06 | <p>This is a very common script:</p>
<pre><code>#!/bin/bash
teststr="col1 col2"
var1=`echo ${teststr} | awk '{print $1}'`
var2=`echo ${teststr} | awk '{print $2}'`
echo var1=${var1}
echo var2=${var2}
</code></pre>
<p>However I dont like this, especially when there are more fields to parse.
I guess there should be... | 29,679 | 393,414 | 2023-09-28 13:36:46 | 9,529,999 | 12 | 2012-03-02 08:10:39 | 967,492 | 2023-09-28 13:36:46 | https://stackoverflow.com/q/9529791 | https://stackoverflow.com/a/9529999 | <p>This might work for you:</p>
<pre><code>var=(col0 col1 col2)
echo "${var[1]}"
</code></pre>
<p>Will output:</p>
<pre><code>col1
</code></pre>
| <p>This might work for you:</p> <pre><code>var=(col0 col1 col2) echo "${var[1]}" </code></pre> <p>Will output:</p> <pre><code>col1 </code></pre> | 387, 990 | awk, bash | <h1>set multiple variables from one awk command?</h1>
<p>This is a very common script:</p>
<pre><code>#!/bin/bash
teststr="col1 col2"
var1=`echo ${teststr} | awk '{print $1}'`
var2=`echo ${teststr} | awk '{print $2}'`
echo var1=${var1}
echo var2=${var2}
</code></pre>
<p>However I dont like this, especially when th... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,737 | bash | # set multiple variables from one awk command?
This is a very common script:
```
#!/bin/bash
teststr="col1 col2"
var1=`echo ${teststr} | awk '{print $1}'`
var2=`echo ${teststr} | awk '{print $2}'`
echo var1=${var1}
echo var2=${var2}
```
However I dont like this, especially when there are more fields to parse.
I g... | This might work for you:
```
var=(col0 col1 col2)
echo "${var[1]}"
```
Will output:
```
col1
``` |
9458752 | Variable for number of lines in a file | 12 | 2012-02-27 00:41:29 | <p>I'm trying to put the number of lines in a file into an integer variable.</p>
<p>This is how i'm doing it</p>
<pre><code>typeset -i x
x=`wc -l $1`
</code></pre>
<p>where $1 is the command line arg</p>
<p>The problem is that wc -l gives a number and the filename like: 5 blah</p>
<p>Is there a way to only put the... | 25,692 | 1,056,858 | 2018-04-23 15:17:28 | 9,458,764 | 12 | 2012-02-27 00:44:41 | 129,570 | 2012-02-27 00:44:41 | https://stackoverflow.com/q/9458752 | https://stackoverflow.com/a/9458764 | <p>You could do <code>cat $1 | wc -l</code> instead.</p>
<p>Or <code>wc -l $1 | cut -d " " -f 1</code>.</p>
| <p>You could do <code>cat $1 | wc -l</code> instead.</p> <p>Or <code>wc -l $1 | cut -d " " -f 1</code>.</p> | 34, 387 | bash, unix | <h1>Variable for number of lines in a file</h1>
<p>I'm trying to put the number of lines in a file into an integer variable.</p>
<p>This is how i'm doing it</p>
<pre><code>typeset -i x
x=`wc -l $1`
</code></pre>
<p>where $1 is the command line arg</p>
<p>The problem is that wc -l gives a number and the filename lik... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,738 | bash | # Variable for number of lines in a file
I'm trying to put the number of lines in a file into an integer variable.
This is how i'm doing it
```
typeset -i x
x=`wc -l $1`
```
where $1 is the command line arg
The problem is that wc -l gives a number and the filename like: 5 blah
Is there a way to only put the numbe... | You could do `cat $1 | wc -l` instead.
Or `wc -l $1 | cut -d " " -f 1`. |
9044661 | Are shell aliases POSIX compliant? | 12 | 2012-01-28 10:45:43 | <p>I am writing a utility which lets you set shell aliases persistently.</p>
<p>I have it in my head that unix shell aliases are POSIX compliant, but I can't remember where I heard this and my google fu has not yielded any definitive answer.</p>
<p>Most of my experience is with zsh and bash.</p>
<p>Is it safe to ass... | 1,820 | 133,414 | 2012-01-28 10:54:15 | 9,044,709 | 12 | 2012-01-28 10:54:15 | 635,608 | 2012-01-28 10:54:15 | https://stackoverflow.com/q/9044661 | https://stackoverflow.com/a/9044709 | <p><a href="http://pubs.opengroup.org/onlinepubs/007904975/utilities/alias.html" rel="noreferrer"><code>alias</code></a> (and <code>unalias</code>) are indeed in POSIX.</p>
<p>See also <a href="http://pubs.opengroup.org/onlinepubs/007904975/utilities/xcu_chap02.html#tag_02_03_01" rel="noreferrer">alias substitution</... | <p><a href="http://pubs.opengroup.org/onlinepubs/007904975/utilities/alias.html" rel="noreferrer"><code>alias</code></a> (and <code>unalias</code>) are indeed in POSIX.</p> <p>See also <a href="http://pubs.opengroup.org/onlinepubs/007904975/utilities/xcu_chap02.html#tag_02_03_01" rel="noreferrer">alias substitution</... | 390, 1448, 1993 | alias, posix, shell | <h1>Are shell aliases POSIX compliant?</h1>
<p>I am writing a utility which lets you set shell aliases persistently.</p>
<p>I have it in my head that unix shell aliases are POSIX compliant, but I can't remember where I heard this and my google fu has not yielded any definitive answer.</p>
<p>Most of my experience is ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,739 | bash | # Are shell aliases POSIX compliant?
I am writing a utility which lets you set shell aliases persistently.
I have it in my head that unix shell aliases are POSIX compliant, but I can't remember where I heard this and my google fu has not yielded any definitive answer.
Most of my experience is with zsh and bash.
Is ... | [`alias`](http://pubs.opengroup.org/onlinepubs/007904975/utilities/alias.html) (and `unalias`) are indeed in POSIX.
See also [alias substitution](http://pubs.opengroup.org/onlinepubs/007904975/utilities/xcu_chap02.html#tag_02_03_01) and [alias names](http://pubs.opengroup.org/onlinepubs/007904975/basedefs/xbd_chap03.h... |
6870362 | Can I create a script with parameter that has [alias("db")] in Powershell? | 12 | 2011-07-29 08:13:13 | <p>If I define the following</p>
<pre><code>[parameter(Mandatory = $true)]
[alias("db")]
[string]$database,
</code></pre>
<p>then I get an error</p>
<pre><code>Parameter alias cannot be specified because an alias with the name 'db'
was defined multiple times for the command.
</code></pre>
<p>Which is true, since <c... | 9,218 | 39,068 | 2022-10-27 13:36:12 | 6,874,332 | 12 | 2011-07-29 14:01:38 | 22,211 | 2022-10-27 13:36:12 | https://stackoverflow.com/q/6870362 | https://stackoverflow.com/a/6874332 | <p>Sorry, you can't. <code>-Debug</code> is a common parameter, so <code>-Debug</code> and <code>-db</code> are switches that are available on pretty much everything including the functions you write yourself. As the error tells you, it's already defined.</p>
<p>Even if it were possible to go around undefining built-in... | <p>Sorry, you can't. <code>-Debug</code> is a common parameter, so <code>-Debug</code> and <code>-db</code> are switches that are available on pretty much everything including the functions you write yourself. As the error tells you, it's already defined.</p> <p>Even if it were possible to go around undefining built-in... | 526 | powershell | <h1>Can I create a script with parameter that has [alias("db")] in Powershell?</h1>
<p>If I define the following</p>
<pre><code>[parameter(Mandatory = $true)]
[alias("db")]
[string]$database,
</code></pre>
<p>then I get an error</p>
<pre><code>Parameter alias cannot be specified because an alias with the name 'db'
w... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,740 | bash | # Can I create a script with parameter that has [alias("db")] in Powershell?
If I define the following
```
[parameter(Mandatory = $true)]
[alias("db")]
[string]$database,
```
then I get an error
```
Parameter alias cannot be specified because an alias with the name 'db'
was defined multiple times for the command.
`... | Sorry, you can't. `-Debug` is a common parameter, so `-Debug` and `-db` are switches that are available on pretty much everything including the functions you write yourself. As the error tells you, it's already defined.
Even if it were possible to go around undefining built-in aliases, that unexpectantly changes the m... |
3321738 | Shell Scripting: Using xargs to execute parallel instances of a shell function | 12 | 2010-07-23 19:33:42 | <p>I'm trying to use xargs in a shell script to run parallel instances of a function I've defined in the same script. The function times the fetching of a page, and so it's important that the pages are actually fetched concurrently in parallel processes, and not in background processes (if my understanding of this is w... | 11,317 | 385,123 | 2010-07-24 15:21:53 | 3,322,993 | 12 | 2010-07-23 23:03:19 | 26,428 | 2010-07-23 23:03:19 | https://stackoverflow.com/q/3321738 | https://stackoverflow.com/a/3322993 | <p>Here's a demo of how you might be able to get your function to work:</p>
<pre><code>$ f() { echo "[$@]"; }
$ export -f f
$ echo -e "b 1\nc 2\nd 3 4" | xargs -P 0 -n 1 -I{} bash -c f\ \{\}
[b 1]
[d 3 4]
[c 2]
</code></pre>
<p>The keys to making this work are to <code>export</code> the function so the <code>bash</co... | <p>Here's a demo of how you might be able to get your function to work:</p> <pre><code>$ f() { echo "[$@]"; } $ export -f f $ echo -e "b 1\nc 2\nd 3 4" | xargs -P 0 -n 1 -I{} bash -c f\ \{\} [b 1] [d 3 4] [c 2] </code></pre> <p>The keys to making this work are to <code>export</code> the function so the <code>bash</co... | 387, 390, 10326 | bash, shell, xargs | <h1>Shell Scripting: Using xargs to execute parallel instances of a shell function</h1>
<p>I'm trying to use xargs in a shell script to run parallel instances of a function I've defined in the same script. The function times the fetching of a page, and so it's important that the pages are actually fetched concurrently ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,741 | bash | # Shell Scripting: Using xargs to execute parallel instances of a shell function
I'm trying to use xargs in a shell script to run parallel instances of a function I've defined in the same script. The function times the fetching of a page, and so it's important that the pages are actually fetched concurrently in parall... | Here's a demo of how you might be able to get your function to work:
```
$ f() { echo "[$@]"; }
$ export -f f
$ echo -e "b 1\nc 2\nd 3 4" | xargs -P 0 -n 1 -I{} bash -c f\ \{\}
[b 1]
[d 3 4]
[c 2]
```
The keys to making this work are to `export` the function so the `bash` that `xargs` spawns will see it and to escape... |
451713 | How to learn your way through Linux's shell | 12 | 2009-01-16 19:50:10 | <p><strong>I want to stop losing precious time when dealing with Linux/Unix's shell.</strong></p>
<p>If I could get to understand it well, that would be great. Otherwise:</p>
<ul>
<li>I may end up losing a day just for setting up a crontab.</li>
<li>I'll keep wondering why the shebang in <em>this</em> script doesn't ... | 4,104 | 25,167 | 2011-03-16 00:38:50 | 451,791 | 12 | 2009-01-16 20:11:13 | 28,804 | 2009-01-16 20:11:13 | https://stackoverflow.com/q/451713 | https://stackoverflow.com/a/451791 | <p>Man pages are probably the "ultimate" solution. I'm always amazed at what gems they contain.</p>
<p>You can even use <code>man bash</code> to answer some of the questions you raise in this question.</p>
| <p>Man pages are probably the "ultimate" solution. I'm always amazed at what gems they contain.</p> <p>You can even use <code>man bash</code> to answer some of the questions you raise in this question.</p> | 34, 58, 387, 390 | bash, linux, shell, unix | <h1>How to learn your way through Linux's shell</h1>
<p><strong>I want to stop losing precious time when dealing with Linux/Unix's shell.</strong></p>
<p>If I could get to understand it well, that would be great. Otherwise:</p>
<ul>
<li>I may end up losing a day just for setting up a crontab.</li>
<li>I'll keep wonde... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,742 | bash | # How to learn your way through Linux's shell
**I want to stop losing precious time when dealing with Linux/Unix's shell.**
If I could get to understand it well, that would be great. Otherwise:
- I may end up losing a day just for setting up a crontab.
- I'll keep wondering why the shebang in *this* script doesn't w... | Man pages are probably the "ultimate" solution. I'm always amazed at what gems they contain.
You can even use `man bash` to answer some of the questions you raise in this question. |
68136128 | How do I call the PowerShell CLI robustly, with respect to character encoding, input and output streams, quoting and escaping? | 11 | 2021-06-25 19:16:49 | <p>This self-answered question aims to give a <strong>systematic overview of the PowerShell CLI (command-line interface)</strong>, both for <em>Windows PowerShell</em> (<code>powershell.exe</code>) and <a href="https://github.com/PowerShell/PowerShell/blob/master/README.md" rel="noreferrer"><em>PowerShell (Core) v6+</e... | 1,727 | 45,375 | 2021-06-27 19:23:13 | 68,136,129 | 12 | 2021-06-25 19:16:49 | 45,375 | 2021-06-27 19:23:13 | https://stackoverflow.com/q/68136128 | https://stackoverflow.com/a/68136129 |
<h3>PowerShell CLI fundamentals:</h3>
<ul>
<li><p><strong>PowerShell editions</strong>: The CLI of the legacy, bundled-with-Windows <em><strong>Windows PowerShell</strong></em> edition is <strong><a href="https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_powershell_exe" rel="nor... | <h3>PowerShell CLI fundamentals:</h3> <ul> <li><p><strong>PowerShell editions</strong>: The CLI of the legacy, bundled-with-Windows <em><strong>Windows PowerShell</strong></em> edition is <strong><a href="https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_powershell_exe" rel="nor... | 526, 10804, 11225, 12658, 26698 | character-encoding, command-line-interface, io-redirection, powershell, quoting | <h1>How do I call the PowerShell CLI robustly, with respect to character encoding, input and output streams, quoting and escaping?</h1>
<p>This self-answered question aims to give a <strong>systematic overview of the PowerShell CLI (command-line interface)</strong>, both for <em>Windows PowerShell</em> (<code>powershel... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,743 | bash | # How do I call the PowerShell CLI robustly, with respect to character encoding, input and output streams, quoting and escaping?
This self-answered question aims to give a **systematic overview of the PowerShell CLI (command-line interface)**, both for *Windows PowerShell* (`powershell.exe`) and [*PowerShell (Core) v6... | ### PowerShell CLI fundamentals:
- **PowerShell editions**: The CLI of the legacy, bundled-with-Windows ***Windows PowerShell*** edition is **[`powershell.exe`](https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_powershell_exe)**, whereas that of the cross-platform, install-on-de... |
48148664 | The Term '-Execution Policy' is not recognized | 11 | 2018-01-08 10:44:50 | <p>I would like to run such a statement in powershell:</p>
<pre><code>-ExecutionPolicy Bypass -File install-sshd.ps1
</code></pre>
<p>But I get this error message:</p>
<blockquote>
<p>-ExecutionPolicy : The term '-ExecutionPolicy' is not recognized as the name of a cmdlet, function, script file, or operable progra... | 68,246 | 2,107,488 | 2022-07-02 07:51:37 | 48,160,516 | 12 | 2018-01-09 02:04:22 | 9,132,707 | 2018-01-09 02:04:22 | https://stackoverflow.com/q/48148664 | https://stackoverflow.com/a/48160516 | <p>As for..
.
"Sorry, I am really new in PowerShel world. What is typo? – Kaja"</p>
<p>Please watch this series
<a href="https://www.youtube.com/results?search_query=beginning+powershell" rel="noreferrer">https://www.youtube.com/results?search_query=beginning+powershell</a></p>
<p>If you are in the cmd prompt or any... | <p>As for.. . "Sorry, I am really new in PowerShel world. What is typo? – Kaja"</p> <p>Please watch this series <a href="https://www.youtube.com/results?search_query=beginning+powershell" rel="noreferrer">https://www.youtube.com/results?search_query=beginning+powershell</a></p> <p>If you are in the cmd prompt or any... | 526 | powershell | <h1>The Term '-Execution Policy' is not recognized</h1>
<p>I would like to run such a statement in powershell:</p>
<pre><code>-ExecutionPolicy Bypass -File install-sshd.ps1
</code></pre>
<p>But I get this error message:</p>
<blockquote>
<p>-ExecutionPolicy : The term '-ExecutionPolicy' is not recognized as the nam... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,744 | bash | # The Term '-Execution Policy' is not recognized
I would like to run such a statement in powershell:
```
-ExecutionPolicy Bypass -File install-sshd.ps1
```
But I get this error message:
> -ExecutionPolicy : The term '-ExecutionPolicy' is not recognized as the name of a cmdlet, function, script file, or operable pro... | As for..
.
"Sorry, I am really new in PowerShel world. What is typo? – Kaja"
Please watch this series
<https://www.youtube.com/results?search_query=beginning+powershell>
If you are in the cmd prompt or any other cmd terminal, you do this..
```
powershell.exe -ExecutionPolicy Bypass "D:\Scripts\Script.ps1"
```
If yo... |
47304329 | Error "syntax error near unexpected token '('" in Bash script when selecting files | 11 | 2017-11-15 09:59:33 | <p>Running this script, <code>bash ./cleanup.bash</code>,</p>
<pre><code>#!/bin/bash
## Going to directory-moving stuff
rm -rf !(composer.json|.git)
</code></pre>
<p>Gives the error:</p>
<blockquote>
<p>cleanup.bash: line 10: syntax error near unexpected token '('
cleanup.bash: line 10: 'rm -rf !(composer.json|.git)'</... | 12,372 | 933,065 | 2021-11-27 13:51:53 | 47,305,041 | 12 | 2017-11-15 10:31:38 | 5,291,015 | 2021-11-27 13:45:37 | https://stackoverflow.com/q/47304329 | https://stackoverflow.com/a/47305041 | <p>I guess your problem is due to the shell extended glob option not set when run from the script. When you claim it works in the command line, you have somehow set the <code>extglob</code> flag which allow to <code>!()</code> globs.</p>
<p>Since the Bash script, whenever started with a <code>#!/bin/bash</code>, starts... | <p>I guess your problem is due to the shell extended glob option not set when run from the script. When you claim it works in the command line, you have somehow set the <code>extglob</code> flag which allow to <code>!()</code> globs.</p> <p>Since the Bash script, whenever started with a <code>#!/bin/bash</code>, starts... | 58, 387, 391 | bash, linux, terminal | <h1>Error "syntax error near unexpected token '('" in Bash script when selecting files</h1>
<p>Running this script, <code>bash ./cleanup.bash</code>,</p>
<pre><code>#!/bin/bash
## Going to directory-moving stuff
rm -rf !(composer.json|.git)
</code></pre>
<p>Gives the error:</p>
<blockquote>
<p>cleanup.bash: line 10: sy... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,745 | bash | # Error "syntax error near unexpected token '('" in Bash script when selecting files
Running this script, `bash ./cleanup.bash`,
```
#!/bin/bash
## Going to directory-moving stuff
rm -rf !(composer.json|.git)
```
Gives the error:
> cleanup.bash: line 10: syntax error near unexpected token '('
> cleanup.bash: line 1... | I guess your problem is due to the shell extended glob option not set when run from the script. When you claim it works in the command line, you have somehow set the `extglob` flag which allow to `!()` globs.
Since the Bash script, whenever started with a `#!/bin/bash`, starts a new sub-shell, the extended options set... |
46452001 | Task Scheduler - get history information into script variables | 11 | 2017-09-27 15:39:01 | <p>Is there a way of getting the task scheduler history information into an array or variable inside a batch or PowerShell script.</p>
<p>For example, get the information such as task name, date and time when the task started (event ID: 100 ) and when it completed (event ID: 102).
This is so I can update a SQL databa... | 11,225 | 4,555,823 | 2017-09-27 17:38:07 | 46,454,037 | 12 | 2017-09-27 17:38:07 | 712,649 | 2017-09-27 17:38:07 | https://stackoverflow.com/q/46452001 | https://stackoverflow.com/a/46454037 | <p>The Task Scheduler logs to the following event channel:<br>
<code>Microsoft-Windows-TaskScheduler/Operational</code></p>
<p>You can use <code>Get-WinEvent</code> to gather the events. Start out by defining a filter hash table for the id <code>100</code> start events</p>
<pre><code># Event filter for the initial qu... | <p>The Task Scheduler logs to the following event channel:<br> <code>Microsoft-Windows-TaskScheduler/Operational</code></p> <p>You can use <code>Get-WinEvent</code> to gather the events. Start out by defining a filter hash table for the id <code>100</code> start events</p> <pre><code># Event filter for the initial qu... | 526, 7002, 115698 | batch-file, powershell, taskscheduler | <h1>Task Scheduler - get history information into script variables</h1>
<p>Is there a way of getting the task scheduler history information into an array or variable inside a batch or PowerShell script.</p>
<p>For example, get the information such as task name, date and time when the task started (event ID: 100 ) and ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,746 | bash | # Task Scheduler - get history information into script variables
Is there a way of getting the task scheduler history information into an array or variable inside a batch or PowerShell script.
For example, get the information such as task name, date and time when the task started (event ID: 100 ) and when it complete... | The Task Scheduler logs to the following event channel:
`Microsoft-Windows-TaskScheduler/Operational`
You can use `Get-WinEvent` to gather the events. Start out by defining a filter hash table for the id `100` start events
```
# Event filter for the initial query for all "Start" events in the last 24 hours
$EventFi... |
42211173 | bash script to run a constant number of jobs in the background | 11 | 2017-02-13 18:39:23 | <p>I need a bash script to run some jobs in the background, three jobs at a time.</p>
<p>I know can do this in the following way, and for illustration, I will assume the number of jobs is 6:</p>
<pre><code>./j1 &
./j2 &
./j3 &
wait
./j4 &
./j5 &
./j6 &
wait
</code></pre>
<p>However, this way,... | 6,901 | 7,226,097 | 2025-06-16 06:39:58 | 42,211,360 | 12 | 2017-02-13 18:50:31 | 14,122 | 2017-08-25 22:02:28 | https://stackoverflow.com/q/42211173 | https://stackoverflow.com/a/42211360 | <p>With GNU xargs:</p>
<pre><code>printf '%s\0' j{1..6} | xargs -0 -n1 -P3 sh -c './"$1"' _
</code></pre>
<hr>
<p>With bash (4.x) builtins:</p>
<pre><code>max_jobs=3; cur_jobs=0
for ((i=0; i<6; i++)); do
# If true, wait until the next background job finishes to continue.
((cur_jobs >= max_jobs)) &&... | <p>With GNU xargs:</p> <pre><code>printf '%s\0' j{1..6} | xargs -0 -n1 -P3 sh -c './"$1"' _ </code></pre> <hr> <p>With bash (4.x) builtins:</p> <pre><code>max_jobs=3; cur_jobs=0 for ((i=0; i<6; i++)); do # If true, wait until the next background job finishes to continue. ((cur_jobs >= max_jobs)) &&... | 58, 387, 390 | bash, linux, shell | <h1>bash script to run a constant number of jobs in the background</h1>
<p>I need a bash script to run some jobs in the background, three jobs at a time.</p>
<p>I know can do this in the following way, and for illustration, I will assume the number of jobs is 6:</p>
<pre><code>./j1 &
./j2 &
./j3 &
wait
./... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,747 | bash | # bash script to run a constant number of jobs in the background
I need a bash script to run some jobs in the background, three jobs at a time.
I know can do this in the following way, and for illustration, I will assume the number of jobs is 6:
```
./j1 &
./j2 &
./j3 &
wait
./j4 &
./j5 &
./j6 &
wait
```
However, t... | With GNU xargs:
```
printf '%s\0' j{1..6} | xargs -0 -n1 -P3 sh -c './"$1"' _
```
---
With bash (4.x) builtins:
```
max_jobs=3; cur_jobs=0
for ((i=0; i<6; i++)); do
# If true, wait until the next background job finishes to continue.
((cur_jobs >= max_jobs)) && wait -n
# Increment the current number of jobs ru... |
39583092 | What does "cat > somefilename <<EOF" (particularly, the greater-than and double less-than symbols) do in shell? | 11 | 2016-09-19 22:35:47 | <p>Just came across the following command:</p>
<pre><code>cat > myspider.py <<EOF
</code></pre>
<p>But I'm not sure of the use of <code>></code> and <code><<</code>.</p>
| 8,076 | 4,238,076 | 2024-06-14 09:34:42 | 39,583,120 | 12 | 2016-09-19 22:38:29 | 14,122 | 2023-12-15 16:05:24 | https://stackoverflow.com/q/39583092 | https://stackoverflow.com/a/39583120 | <p><code><<EOF</code> is the start of a heredoc. Content after this line and prior to the next line containing only <code>EOF</code> is fed on stdin to the process <code>cat</code>.</p>
<p><code>> myspider.py</code> is a stdout redirection. <code>myspider.py</code> will be truncated if it already exists (and i... | <p><code><<EOF</code> is the start of a heredoc. Content after this line and prior to the next line containing only <code>EOF</code> is fed on stdin to the process <code>cat</code>.</p> <p><code>> myspider.py</code> is a stdout redirection. <code>myspider.py</code> will be truncated if it already exists (and i... | 387, 390 | bash, shell | <h1>What does "cat > somefilename <<EOF" (particularly, the greater-than and double less-than symbols) do in shell?</h1>
<p>Just came across the following command:</p>
<pre><code>cat > myspider.py <<EOF
</code></pre>
<p>But I'm not sure of the use of <code>></code> and <code><<</code>.</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,748 | bash | # What does "cat > somefilename < Just came across the following command: ``` cat > myspider.py <<EOF ``` But I'm not sure of the use of `>` and `<<`. | `<<EOF` is the start of a heredoc. Content after this line and prior to the next line containing only `EOF` is fed on stdin to the process `cat`.
`> myspider.py` is a stdout redirection. `myspider.py` will be truncated if it already exists (and is a regular file), and output of `cat` will be written into it.
Since `c... |
39443913 | Passing a command with arguments as a string to docker run | 11 | 2016-09-12 05:36:11 | <p>The issue I'm facing is how to pass a command with arguments to <code>docker run</code>. The problem is that <code>docker run</code> does not take command plus arguments as a single string. They need to be provided as individual first-class arguments to <code>docker run</code>, such as:</p>
<pre><code>#!/bin/bash
d... | 22,039 | 143,397 | 2016-09-13 01:25:24 | 39,460,934 | 12 | 2016-09-13 01:25:24 | 147,356 | 2016-09-13 01:25:24 | https://stackoverflow.com/q/39443913 | https://stackoverflow.com/a/39460934 | <p>Start with the syntax of the <code>docker run</code> command, which is:</p>
<pre><code>docker run [OPTIONS] IMAGE[:TAG|@DIGEST] [COMMAND] [ARG...]
</code></pre>
<p>This means if you run:</p>
<pre><code>DOCKER_COMMAND='bash -c "(cd build && make)"'
docker run --rm -it myImage "$DOCKER_COMMAND"
</code></pre... | <p>Start with the syntax of the <code>docker run</code> command, which is:</p> <pre><code>docker run [OPTIONS] IMAGE[:TAG|@DIGEST] [COMMAND] [ARG...] </code></pre> <p>This means if you run:</p> <pre><code>DOCKER_COMMAND='bash -c "(cd build && make)"' docker run --rm -it myImage "$DOCKER_COMMAND" </code></pre... | 58, 387, 390, 19749, 90304 | bash, docker, linux, shell, variable-expansion | <h1>Passing a command with arguments as a string to docker run</h1>
<p>The issue I'm facing is how to pass a command with arguments to <code>docker run</code>. The problem is that <code>docker run</code> does not take command plus arguments as a single string. They need to be provided as individual first-class argument... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,749 | bash | # Passing a command with arguments as a string to docker run
The issue I'm facing is how to pass a command with arguments to `docker run`. The problem is that `docker run` does not take command plus arguments as a single string. They need to be provided as individual first-class arguments to `docker run`, such as:
``... | Start with the syntax of the `docker run` command, which is:
```
docker run [OPTIONS] IMAGE[:TAG|@DIGEST] [COMMAND] [ARG...]
```
This means if you run:
```
DOCKER_COMMAND='bash -c "(cd build && make)"'
docker run --rm -it myImage "$DOCKER_COMMAND"
```
You are passing the entirety of the `$DOCKER_COMMAND` variable a... |
36442572 | How to make RETURN trap in bash preserve the return code? | 11 | 2016-04-06 05:50:36 | <p>Below is the simplified scheme of the script I am writing. The program must take parameters in different ways, so there is a fine division to several functions.</p>
<p>The problem is that the chainloading of the return value from deeper functions breaks on the trap, where the result is to be checked to show a messag... | 6,882 | 685,107 | 2025-05-04 16:42:53 | 36,442,661 | 12 | 2016-04-06 05:56:34 | 685,107 | 2016-04-06 06:10:43 | https://stackoverflow.com/q/36442572 | https://stackoverflow.com/a/36442661 | <p>Funny enough,</p>
<pre><code>trap "return_trap; trap - RETURN" RETURN
</code></pre>
<p>simply works.</p>
<pre><code>[ ! -v MANUAL ] && {
check_params; retval2=$?
[ $retval2 -eq 0 ] \
&& echo "check_params() returned with 0. Not running manual setup." \
|| false
}|| ask_for_... | <p>Funny enough,</p> <pre><code>trap "return_trap; trap - RETURN" RETURN </code></pre> <p>simply works.</p> <pre><code>[ ! -v MANUAL ] && { check_params; retval2=$? [ $retval2 -eq 0 ] \ && echo "check_params() returned with 0. Not running manual setup." \ || false }|| ask_for_... | 58, 387, 124485 | bash, bash-trap, linux | <h1>How to make RETURN trap in bash preserve the return code?</h1>
<p>Below is the simplified scheme of the script I am writing. The program must take parameters in different ways, so there is a fine division to several functions.</p>
<p>The problem is that the chainloading of the return value from deeper functions bre... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,750 | bash | # How to make RETURN trap in bash preserve the return code?
Below is the simplified scheme of the script I am writing. The program must take parameters in different ways, so there is a fine division to several functions.
The problem is that the chainloading of the return value from deeper functions breaks on the trap... | Funny enough,
```
trap "return_trap; trap - RETURN" RETURN
```
simply works.
```
[ ! -v MANUAL ] && {
check_params; retval2=$?
[ $retval2 -eq 0 ] \
&& echo "check_params() returned with 0. Not running manual setup." \
|| false
}|| ask_for_params
```
And here’s the trace.
```
+ check_a_param... |
35308981 | Add double quotes to variable to escape space | 11 | 2016-02-10 07:14:24 | <p>I am running a script which has $FileName variable containing the absolute path with spaces. Due to the space within the directory name and file name, the script fails to executes without finding the actual path. All I need is to add $FilePath within double quotes. How should I append double quotes in the beginning ... | 36,552 | 3,331,975 | 2019-02-15 13:56:26 | 35,309,729 | 12 | 2016-02-10 08:04:59 | 712,649 | 2016-02-10 08:04:59 | https://stackoverflow.com/q/35308981 | https://stackoverflow.com/a/35309729 | <p>In addition to the backtick escape character (<code>`</code>), you can use the <code>-f</code> format operator:</p>
<pre><code>$FilePath = Join-Path $Dir -ChildPath "$File.txt"
$FilePathWithQuotes = '"{0}"' -f $FilePath
</code></pre>
<p>This will ensure that <code>$FilePath</code> is expanded before being placed i... | <p>In addition to the backtick escape character (<code>`</code>), you can use the <code>-f</code> format operator:</p> <pre><code>$FilePath = Join-Path $Dir -ChildPath "$File.txt" $FilePathWithQuotes = '"{0}"' -f $FilePath </code></pre> <p>This will ensure that <code>$FilePath</code> is expanded before being placed i... | 526 | powershell | <h1>Add double quotes to variable to escape space</h1>
<p>I am running a script which has $FileName variable containing the absolute path with spaces. Due to the space within the directory name and file name, the script fails to executes without finding the actual path. All I need is to add $FilePath within double quot... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,751 | bash | # Add double quotes to variable to escape space
I am running a script which has $FileName variable containing the absolute path with spaces. Due to the space within the directory name and file name, the script fails to executes without finding the actual path. All I need is to add $FilePath within double quotes. How s... | In addition to the backtick escape character (`` ` ``), you can use the `-f` format operator:
```
$FilePath = Join-Path $Dir -ChildPath "$File.txt"
$FilePathWithQuotes = '"{0}"' -f $FilePath
```
This will ensure that `$FilePath` is expanded before being placed in the string |
34166077 | Multi-line variables remove new line character - Fish | 11 | 2015-12-08 21:11:00 | <p>When I set any multiline text as a variable in fish, it removes the new line characters and replaces them with space, how can I stop it from doing that? Minimal complete example:</p>
<pre><code>~ ) set lines (cat .lorem); set start 2; set end 4;
~ ) cat .lorem
once upon a midnight dreary while i pondered weak and w... | 4,893 | 3,657,151 | 2024-08-13 04:14:52 | 34,186,172 | 12 | 2015-12-09 18:19:05 | 1,441,328 | 2015-12-09 18:19:05 | https://stackoverflow.com/q/34166077 | https://stackoverflow.com/a/34186172 | <p>fish splits command substitutions on newlines. This means that <code>$lines</code> is a list. You can read more <a href="http://fishshell.com/docs/current/tutorial.html#tut_lists" rel="noreferrer">about lists here</a>.</p>
<p>When you pass a list to a command, each entry in the list becomes a separate argument. <co... | <p>fish splits command substitutions on newlines. This means that <code>$lines</code> is a list. You can read more <a href="http://fishshell.com/docs/current/tutorial.html#tut_lists" rel="noreferrer">about lists here</a>.</p> <p>When you pass a list to a command, each entry in the list becomes a separate argument. <co... | 390, 55824 | fish, shell | <h1>Multi-line variables remove new line character - Fish</h1>
<p>When I set any multiline text as a variable in fish, it removes the new line characters and replaces them with space, how can I stop it from doing that? Minimal complete example:</p>
<pre><code>~ ) set lines (cat .lorem); set start 2; set end 4;
~ ) cat ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,752 | bash | # Multi-line variables remove new line character - Fish
When I set any multiline text as a variable in fish, it removes the new line characters and replaces them with space, how can I stop it from doing that? Minimal complete example:
```
~ ) set lines (cat .lorem); set start 2; set end 4;
~ ) cat .lorem
once upon a... | fish splits command substitutions on newlines. This means that `$lines` is a list. You can read more [about lists here](http://fishshell.com/docs/current/tutorial.html#tut_lists).
When you pass a list to a command, each entry in the list becomes a separate argument. `echo` space-separates its arguments. That explains ... |
34008223 | Check if directory exists on remote machine with ssh | 11 | 2015-11-30 21:21:48 | <p>This question has been already posted but I would like to know if there is a way to know if a directory exists on a remote machine with ssh BUT from the command line directly and not from a script. As I saw in this previous post: <a href="https://stackoverflow.com/questions/15927911/how-to-check-if-dir-exist-over-ss... | 13,279 | 5,577,751 | 2019-08-15 20:17:06 | 34,020,570 | 12 | 2015-12-01 12:34:29 | 3,744,681 | 2015-12-01 12:34:29 | https://stackoverflow.com/q/34008223 | https://stackoverflow.com/a/34020570 | <p>This is a one liner:</p>
<pre><code>ssh armand@127.0.0.1 '[ -d Documents ] && echo exists || echo does not exist'
</code></pre>
| <p>This is a one liner:</p> <pre><code>ssh armand@127.0.0.1 '[ -d Documents ] && echo exists || echo does not exist' </code></pre> | 386, 387 | bash, ssh | <h1>Check if directory exists on remote machine with ssh</h1>
<p>This question has been already posted but I would like to know if there is a way to know if a directory exists on a remote machine with ssh BUT from the command line directly and not from a script. As I saw in this previous post: <a href="https://stackove... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,753 | bash | # Check if directory exists on remote machine with ssh
This question has been already posted but I would like to know if there is a way to know if a directory exists on a remote machine with ssh BUT from the command line directly and not from a script. As I saw in this previous post: [How to check if dir exists over s... | This is a one liner:
```
ssh armand@127.0.0.1 '[ -d Documents ] && echo exists || echo does not exist'
``` |
32774889 | How to round-trip this JSON to PSObject and back in Powershell | 11 | 2015-09-25 04:37:39 | <p>Powershell can't seem to correctly round-trip this JSON object:</p>
<pre><code>{
"settings": {
"minimumApproverCount": 2,
"creatorVoteCounts": false,
"scope": [
{
"refName": "refs/heads/d14rel",
"matchKind": "Exact",
"repository... | 2,405 | 46,926 | 2015-09-25 04:59:14 | 32,775,099 | 12 | 2015-09-25 04:59:14 | 323,582 | 2015-09-25 04:59:14 | https://stackoverflow.com/q/32774889 | https://stackoverflow.com/a/32775099 | <p>Use the parameter <code>Depth</code> with value 3 or larger. The default 2 is not enough, deeper data are simply converted to strings.</p>
<pre><code>$json | ConvertFrom-Json | ConvertTo-Json -Depth 3
</code></pre>
<p>Output</p>
<pre><code>{
"settings": {
"minimumApproverCount": 2,
... | <p>Use the parameter <code>Depth</code> with value 3 or larger. The default 2 is not enough, deeper data are simply converted to strings.</p> <pre><code>$json | ConvertFrom-Json | ConvertTo-Json -Depth 3 </code></pre> <p>Output</p> <pre><code>{ "settings": { "minimumApproverCount": 2, ... | 526, 1508 | json, powershell | <h1>How to round-trip this JSON to PSObject and back in Powershell</h1>
<p>Powershell can't seem to correctly round-trip this JSON object:</p>
<pre><code>{
"settings": {
"minimumApproverCount": 2,
"creatorVoteCounts": false,
"scope": [
{
"refName": "refs/heads/d1... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,754 | bash | # How to round-trip this JSON to PSObject and back in Powershell
Powershell can't seem to correctly round-trip this JSON object:
```
{
"settings": {
"minimumApproverCount": 2,
"creatorVoteCounts": false,
"scope": [
{
"refName": "refs/heads/d14rel",
... | Use the parameter `Depth` with value 3 or larger. The default 2 is not enough, deeper data are simply converted to strings.
```
$json | ConvertFrom-Json | ConvertTo-Json -Depth 3
```
Output
```
{
"settings": {
"minimumApproverCount": 2,
"creatorVoteCounts": false,
... |
28534621 | Remove Files older than 3 years | 11 | 2015-02-16 04:40:10 | <p>I need to remove any file in the directory that is older than 2 years old. It is very important that I keep the newest files and delete the old files. </p>
<p>I have searched and found this. </p>
<pre><code>find /path/to/files* -mtime +365 -exec rm {} \;
</code></pre>
<p>Can I just multiply the number?</p>
<pr... | 29,557 | 4,529,428 | 2016-09-01 09:34:20 | 28,534,707 | 12 | 2015-02-16 04:48:37 | 2,970,947 | 2015-02-16 04:48:37 | https://stackoverflow.com/q/28534621 | https://stackoverflow.com/a/28534707 | <blockquote>
<p>Can I just multiply the number?</p>
<pre><code>find /path/to/files -mtime +1095 -exec rm {} \;
</code></pre>
</blockquote>
<p>Yes. And to "echo" before you remove</p>
<pre><code>find /path/to/files -mtime +1095 -print
</code></pre>
<p>Then the version with <code>-exec rm {} \;</code> to remove... | <blockquote> <p>Can I just multiply the number?</p> <pre><code>find /path/to/files -mtime +1095 -exec rm {} \; </code></pre> </blockquote> <p>Yes. And to "echo" before you remove</p> <pre><code>find /path/to/files -mtime +1095 -print </code></pre> <p>Then the version with <code>-exec rm {} \;</code> to remove... | 58, 387, 37510 | bash, delete-file, linux | <h1>Remove Files older than 3 years</h1>
<p>I need to remove any file in the directory that is older than 2 years old. It is very important that I keep the newest files and delete the old files. </p>
<p>I have searched and found this. </p>
<pre><code>find /path/to/files* -mtime +365 -exec rm {} \;
</code></pre>
<p... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,755 | bash | # Remove Files older than 3 years
I need to remove any file in the directory that is older than 2 years old. It is very important that I keep the newest files and delete the old files.
I have searched and found this.
```
find /path/to/files* -mtime +365 -exec rm {} \;
```
Can I just multiply the number?
```
find /... | > Can I just multiply the number?
>
> ```
> find /path/to/files -mtime +1095 -exec rm {} \;
> ```
Yes. And to "echo" before you remove
```
find /path/to/files -mtime +1095 -print
```
Then the version with `-exec rm {} \;` to remove the files (when you are ready). |
27904943 | Popen.communicate() returns (None, None) even if script print results | 11 | 2015-01-12 15:03:44 | <p>I have problem with Popen.communicate().</p>
<p>I have script which return string. </p>
<p>Then I have wrote second script which takes that variable.</p>
<pre><code>v = "./myscript arg1 arg2"
com = subprocess.Popen(v, shell=True).communicate()
print com
</code></pre>
<p>com returns (None, None). The point is tha... | 8,156 | 2,084,386 | 2018-10-29 10:30:28 | 27,904,973 | 12 | 2015-01-12 15:05:13 | 1,222,951 | 2018-10-29 10:30:28 | https://stackoverflow.com/q/27904943 | https://stackoverflow.com/a/27904973 | <p>From the <a href="https://docs.python.org/2/library/subprocess.html#subprocess.Popen.communicate" rel="nofollow noreferrer">docs</a>:</p>
<blockquote>
<p>Note that if you want to send data to the process’s stdin, you need to create the <code>Popen</code> object with <code>stdin=PIPE</code>. Similarly, to get anyt... | <p>From the <a href="https://docs.python.org/2/library/subprocess.html#subprocess.Popen.communicate" rel="nofollow noreferrer">docs</a>:</p> <blockquote> <p>Note that if you want to send data to the process’s stdin, you need to create the <code>Popen</code> object with <code>stdin=PIPE</code>. Similarly, to get anyt... | 16, 390 | python, shell | <h1>Popen.communicate() returns (None, None) even if script print results</h1>
<p>I have problem with Popen.communicate().</p>
<p>I have script which return string. </p>
<p>Then I have wrote second script which takes that variable.</p>
<pre><code>v = "./myscript arg1 arg2"
com = subprocess.Popen(v, shell=True).commu... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,756 | bash | # Popen.communicate() returns (None, None) even if script print results
I have problem with Popen.communicate().
I have script which return string.
Then I have wrote second script which takes that variable.
```
v = "./myscript arg1 arg2"
com = subprocess.Popen(v, shell=True).communicate()
print com
```
com returns... | From the [docs](https://docs.python.org/2/library/subprocess.html#subprocess.Popen.communicate):
> Note that if you want to send data to the process’s stdin, you need to create the `Popen` object with `stdin=PIPE`. Similarly, to get anything other than `None` in the result tuple, you need to give `stdout=PIPE` and/or ... |
27577478 | What does the semicolon do when it is run in a bash command? | 11 | 2014-12-20 05:56:57 | <p>For example, when running</p>
<pre><code>echo a; echo b
</code></pre>
<p>in the terminal, its output is:</p>
<pre><code>a
b
</code></pre>
<p>It seems to me that the semicolon waits for the first command (<code>echo a</code>) to finish, then it starts the second command (<code>echo b</code>).</p>
<p><strong>Q:</... | 14,417 | null | 2014-12-20 06:13:25 | 27,577,487 | 12 | 2014-12-20 05:58:45 | 3,150,943 | 2014-12-20 06:13:25 | https://stackoverflow.com/q/27577478 | https://stackoverflow.com/a/27577487 | <p>The <code>;</code> separates the two commands.</p>
<pre><code>echo a; echo b
</code></pre>
<p>It lets the bash know that <code>echo a</code> and <code>echo b</code> are two separate commands and need to be run separately one after the other</p>
<p>Try without semicolons</p>
<pre><code>$ echo a echo b
a echo b
<... | <p>The <code>;</code> separates the two commands.</p> <pre><code>echo a; echo b </code></pre> <p>It lets the bash know that <code>echo a</code> and <code>echo b</code> are two separate commands and need to be run separately one after the other</p> <p>Try without semicolons</p> <pre><code>$ echo a echo b a echo b <... | 387, 391, 4072 | bash, gnu, terminal | <h1>What does the semicolon do when it is run in a bash command?</h1>
<p>For example, when running</p>
<pre><code>echo a; echo b
</code></pre>
<p>in the terminal, its output is:</p>
<pre><code>a
b
</code></pre>
<p>It seems to me that the semicolon waits for the first command (<code>echo a</code>) to finish, then it... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,757 | bash | # What does the semicolon do when it is run in a bash command?
For example, when running
```
echo a; echo b
```
in the terminal, its output is:
```
a
b
```
It seems to me that the semicolon waits for the first command (`echo a`) to finish, then it starts the second command (`echo b`).
**Q:** Is the semicolon just... | The `;` separates the two commands.
```
echo a; echo b
```
It lets the bash know that `echo a` and `echo b` are two separate commands and need to be run separately one after the other
Try without semicolons
```
$ echo a echo b
a echo b
```
Here the statement is taken as a single command `echo` and `a echo b` is pa... |
10496758 | 'Unexpected end of file' and 'error importing function definition' error running shellscript using qsub | 11 | 2012-05-08 10:21:50 | <p>I have the following shellscript:</p>
<pre><code>#!/bin/sh
cd /sw/local/bin/
export LD_LIBRARY_PATH=/sw/local/lib:/usr/local/Trolltech/Qt-4.7.2/lib:$LD_LIBRARY_PATH
./FeatureFinderRaw -in /homes/JG-C1-18.mzML -out /homes/test_remove_after_use.featureXML -threads 20
</code></pre>
<p>It works fine when I run it from... | 29,685 | 651,779 | 2022-06-06 08:10:00 | 27,130,671 | 12 | 2014-11-25 15:30:14 | 442,359 | 2014-11-25 15:30:14 | https://stackoverflow.com/q/10496758 | https://stackoverflow.com/a/27130671 | <p>Also have this problem in a wrapper script that uses </p>
<pre><code>qsub -shell no -b yes -cwd -V somescript.bash arg1 arg2 etc
</code></pre>
<p>if you use it to submit another bash shell script. It produces the annonying </p>
<pre><code>/bin/sh: module: line 1: syntax error: unexpected end of file
/bin/sh: erro... | <p>Also have this problem in a wrapper script that uses </p> <pre><code>qsub -shell no -b yes -cwd -V somescript.bash arg1 arg2 etc </code></pre> <p>if you use it to submit another bash shell script. It produces the annonying </p> <pre><code>/bin/sh: module: line 1: syntax error: unexpected end of file /bin/sh: erro... | 58, 390, 9228, 26217 | cluster-computing, linux, qsub, shell | <h1>'Unexpected end of file' and 'error importing function definition' error running shellscript using qsub</h1>
<p>I have the following shellscript:</p>
<pre><code>#!/bin/sh
cd /sw/local/bin/
export LD_LIBRARY_PATH=/sw/local/lib:/usr/local/Trolltech/Qt-4.7.2/lib:$LD_LIBRARY_PATH
./FeatureFinderRaw -in /homes/JG-C1-18... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,758 | bash | # 'Unexpected end of file' and 'error importing function definition' error running shellscript using qsub
I have the following shellscript:
```
#!/bin/sh
cd /sw/local/bin/
export LD_LIBRARY_PATH=/sw/local/lib:/usr/local/Trolltech/Qt-4.7.2/lib:$LD_LIBRARY_PATH
./FeatureFinderRaw -in /homes/JG-C1-18.mzML -out /homes/te... | Also have this problem in a wrapper script that uses
```
qsub -shell no -b yes -cwd -V somescript.bash arg1 arg2 etc
```
if you use it to submit another bash shell script. It produces the annonying
```
/bin/sh: module: line 1: syntax error: unexpected end of file
/bin/sh: error importing function definition for `BAS... |
26298979 | configure command not found cygwin | 11 | 2014-10-10 12:01:24 | <p>This question has been asked many time but I am not able to resolve the problem from them so I am asking</p>
<p>I had installed Cygwin a few days ago.I tried using <code>./configure</code> command but it says</p>
<blockquote>
<p>-bash: ./configure: No such file or directory</p>
</blockquote>
<p>I tried using</p... | 31,121 | null | 2023-04-23 01:50:27 | 26,299,319 | 12 | 2014-10-10 12:19:17 | 60,281 | 2014-10-10 12:24:23 | https://stackoverflow.com/q/26298979 | https://stackoverflow.com/a/26299319 | <p>If a software project is set up to be built using <a href="http://www.gnu.org/software/autoconf/" rel="noreferrer">autoconf</a>, that tool generates a script canonically called <code>configure</code>. It queries the system for various parameters that are subsequently used in the build, and is <em>specific to the sof... | <p>If a software project is set up to be built using <a href="http://www.gnu.org/software/autoconf/" rel="noreferrer">autoconf</a>, that tool generates a script canonically called <code>configure</code>. It queries the system for various parameters that are subsequently used in the build, and is <em>specific to the sof... | 387, 1731 | bash, cygwin | <h1>configure command not found cygwin</h1>
<p>This question has been asked many time but I am not able to resolve the problem from them so I am asking</p>
<p>I had installed Cygwin a few days ago.I tried using <code>./configure</code> command but it says</p>
<blockquote>
<p>-bash: ./configure: No such file or dire... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,759 | bash | # configure command not found cygwin
This question has been asked many time but I am not able to resolve the problem from them so I am asking
I had installed Cygwin a few days ago.I tried using `./configure` command but it says
> -bash: ./configure: No such file or directory
I tried using
```
where configure
```
... | If a software project is set up to be built using [autoconf](http://www.gnu.org/software/autoconf/), that tool generates a script canonically called `configure`. It queries the system for various parameters that are subsequently used in the build, and is *specific to the software package to be built*. Different softwar... |
23369917 | Cleaner way to write multiple sed commands? | 11 | 2014-04-29 16:11:19 | <p>Is there a more DRY way to write the following commands (will be putting them in a bash shell script):</p>
<pre><code>sudo sed -i 's/^#PermitRootLogin yes/PermitRootLogin no/' /etc/ssh/sshd_config
sudo sed -i 's/PermitRootLogin yes/PermitRootLogin no/' /etc/ssh/sshd_config
sudo sed -i 's/^#PermitEmptyPasswords yes... | 2,946 | 3,188,544 | 2016-08-22 17:25:53 | 23,370,005 | 12 | 2014-04-29 16:15:53 | 2,235,132 | 2014-04-29 16:26:11 | https://stackoverflow.com/q/23369917 | https://stackoverflow.com/a/23370005 | <p>Since the patterns to be matched are similar, you could make use of alternation for the 4 strings and capture it. Make the <code>#</code> at the beginning of the string optional.</p>
<p>The following would combine those into one:</p>
<pre><code>sed -i -r 's/^#?(PermitRootLogin|PermitEmptyPasswords|PasswordAuthent... | <p>Since the patterns to be matched are similar, you could make use of alternation for the 4 strings and capture it. Make the <code>#</code> at the beginning of the string optional.</p> <p>The following would combine those into one:</p> <pre><code>sed -i -r 's/^#?(PermitRootLogin|PermitEmptyPasswords|PasswordAuthent... | 58, 387, 390, 549, 5282 | bash, linux, sed, shell, ubuntu | <h1>Cleaner way to write multiple sed commands?</h1>
<p>Is there a more DRY way to write the following commands (will be putting them in a bash shell script):</p>
<pre><code>sudo sed -i 's/^#PermitRootLogin yes/PermitRootLogin no/' /etc/ssh/sshd_config
sudo sed -i 's/PermitRootLogin yes/PermitRootLogin no/' /etc/ssh/s... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,760 | bash | # Cleaner way to write multiple sed commands?
Is there a more DRY way to write the following commands (will be putting them in a bash shell script):
```
sudo sed -i 's/^#PermitRootLogin yes/PermitRootLogin no/' /etc/ssh/sshd_config
sudo sed -i 's/PermitRootLogin yes/PermitRootLogin no/' /etc/ssh/sshd_config
sudo sed... | Since the patterns to be matched are similar, you could make use of alternation for the 4 strings and capture it. Make the `#` at the beginning of the string optional.
The following would combine those into one:
```
sed -i -r 's/^#?(PermitRootLogin|PermitEmptyPasswords|PasswordAuthentication|X11Forwarding) yes/\1 no/... |
20769621 | Saving the result of a MongoDB query | 11 | 2013-12-25 06:12:16 | <p>When doing a research in mongo shell I often write quite complex queries and want the result to be stored in other collection. I know the way to do it with <code>.forEach()</code>:</p>
<p><code>db.documents.find(query).forEach(function(d){db.results.insert(d)})</code></p>
<p>But it's kind of tedious to write that ... | 23,132 | 1,085,375 | 2017-01-10 09:25:51 | 20,770,564 | 12 | 2013-12-25 08:12:04 | 1,085,375 | 2017-01-10 09:25:51 | https://stackoverflow.com/q/20769621 | https://stackoverflow.com/a/20770564 | <p>Here's a solution I'll use: <code>db.results.insert(db.docs.find(...).toArray())</code></p>
<p>There is still too much noise, though.</p>
<p><em>UPD</em>: There is also an option to rewrite <code>find</code> using aggregation pipeline. Then you can use <a href="https://docs.mongodb.com/v3.2/reference/operator/aggr... | <p>Here's a solution I'll use: <code>db.results.insert(db.docs.find(...).toArray())</code></p> <p>There is still too much noise, though.</p> <p><em>UPD</em>: There is also an option to rewrite <code>find</code> using aggregation pipeline. Then you can use <a href="https://docs.mongodb.com/v3.2/reference/operator/aggr... | 30073, 69521 | mongodb, mongo-shell | <h1>Saving the result of a MongoDB query</h1>
<p>When doing a research in mongo shell I often write quite complex queries and want the result to be stored in other collection. I know the way to do it with <code>.forEach()</code>:</p>
<p><code>db.documents.find(query).forEach(function(d){db.results.insert(d)})</code></... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,761 | bash | # Saving the result of a MongoDB query
When doing a research in mongo shell I often write quite complex queries and want the result to be stored in other collection. I know the way to do it with `.forEach()`:
`db.documents.find(query).forEach(function(d){db.results.insert(d)})`
But it's kind of tedious to write that... | Here's a solution I'll use: `db.results.insert(db.docs.find(...).toArray())`
There is still too much noise, though.
*UPD*: There is also an option to rewrite `find` using aggregation pipeline. Then you can use [`$out` operator](https://docs.mongodb.com/v3.2/reference/operator/aggregation/out/). |
20445398 | Use Backup-SqlDatabase cmdlet with SQL Server Authentication | 11 | 2013-12-07 19:11:11 | <p>Is there a way to call Backup-SqlDatabase cmdlet but have it connect to SQL Server 2012 with SQL Server credentials? </p>
<p>The command I am currently using is:</p>
<pre><code>Backup-SqlDatabase -ServerInstance $serverName -Database $sqldbname -BackupFile "$($backupFolder)$($dbname)_db_$($addinionToName).bak"
</c... | 25,361 | 645,460 | 2013-12-09 20:50:29 | 20,480,506 | 12 | 2013-12-09 20:50:29 | 135,965 | 2013-12-09 20:50:29 | https://stackoverflow.com/q/20445398 | https://stackoverflow.com/a/20480506 | <p>The backup-sqldatabase cmdlet supports the Credential parameter. If you look at the help for the cmdlet there's even an example (from help backup-sqldatabase -full):</p>
<pre><code> -------------------------- EXAMPLE 4 --------------------------
C:\PS>Backup-SqlDatabase -ServerInstance Computer\Instance -Datab... | <p>The backup-sqldatabase cmdlet supports the Credential parameter. If you look at the help for the cmdlet there's even an example (from help backup-sqldatabase -full):</p> <pre><code> -------------------------- EXAMPLE 4 -------------------------- C:\PS>Backup-SqlDatabase -ServerInstance Computer\Instance -Datab... | 526, 74269, 98685 | backup-sqldatabase, powershell, sql-server-2012 | <h1>Use Backup-SqlDatabase cmdlet with SQL Server Authentication</h1>
<p>Is there a way to call Backup-SqlDatabase cmdlet but have it connect to SQL Server 2012 with SQL Server credentials? </p>
<p>The command I am currently using is:</p>
<pre><code>Backup-SqlDatabase -ServerInstance $serverName -Database $sqldbname ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,762 | bash | # Use Backup-SqlDatabase cmdlet with SQL Server Authentication
Is there a way to call Backup-SqlDatabase cmdlet but have it connect to SQL Server 2012 with SQL Server credentials?
The command I am currently using is:
```
Backup-SqlDatabase -ServerInstance $serverName -Database $sqldbname -BackupFile "$($backupFolder... | The backup-sqldatabase cmdlet supports the Credential parameter. If you look at the help for the cmdlet there's even an example (from help backup-sqldatabase -full):
```
-------------------------- EXAMPLE 4 --------------------------
C:\PS>Backup-SqlDatabase -ServerInstance Computer\Instance -Database MyDB -Credent... |
17847390 | How to resume stopped job on a remote machine given pid? | 11 | 2013-07-25 01:15:42 | <p>I have a process on a machine which I stopped (with a Ctrl-Z). After ssh'ing onto the machine, how do I resume the process?</p>
| 12,855 | 807,037 | 2013-07-25 03:14:13 | 17,847,912 | 12 | 2013-07-25 02:15:35 | 41,861 | 2013-07-25 02:15:35 | https://stackoverflow.com/q/17847390 | https://stackoverflow.com/a/17847912 | <p>You will need to find the PID and then issue <code>kill -CONT <pid></code>.</p>
<p>You can find the PID by using <code>ps</code> with some options to produce extended output. Stopped jobs have a <code>T</code> in the <code>STAT</code> (or <code>S</code>) column.</p>
<p>If you succeed in continuing the proce... | <p>You will need to find the PID and then issue <code>kill -CONT <pid></code>.</p> <p>You can find the PID by using <code>ps</code> with some options to produce extended output. Stopped jobs have a <code>T</code> in the <code>STAT</code> (or <code>S</code>) column.</p> <p>If you succeed in continuing the proce... | 58, 390 | linux, shell | <h1>How to resume stopped job on a remote machine given pid?</h1>
<p>I have a process on a machine which I stopped (with a Ctrl-Z). After ssh'ing onto the machine, how do I resume the process?</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,763 | bash | # How to resume stopped job on a remote machine given pid?
I have a process on a machine which I stopped (with a Ctrl-Z). After ssh'ing onto the machine, how do I resume the process? | You will need to find the PID and then issue `kill -CONT <pid>`.
You can find the PID by using `ps` with some options to produce extended output. Stopped jobs have a `T` in the `STAT` (or `S`) column.
If you succeed in continuing the process but it no longer has a controlling terminal (and it needs one) then it could... |
11131389 | Having a optional parameter that requires another parameter to be present | 11 | 2012-06-21 04:13:17 | <p>Quite simply, how do I initialize the <code>params</code> part of my Powershell Script so I can have a command line arguments like</p>
<pre><code>Get-Foo [-foo1] <foo1Arg> [-foo2 <foo2Arg> [-bar <barArg>]]
</code></pre>
<p>So the only time I can use <code>-bar</code> is when <code>foo2</code> has... | 15,113 | 80,274 | 2016-12-31 21:55:15 | 16,058,329 | 12 | 2013-04-17 11:04:11 | 2,290,272 | 2013-04-17 11:04:11 | https://stackoverflow.com/q/11131389 | https://stackoverflow.com/a/16058329 | <p>My reading of the original question is slightly different to C.B.'s. From</p>
<pre><code>Get-Foo [-foo1] <foo1Arg> [-foo2 <foo2Arg> [-bar <barArg>]]
</code></pre>
<p>The first argument $foo1 is always mandatory, while if $bar is specified $foo2 must be specified too.</p>
<p>So my coding of it w... | <p>My reading of the original question is slightly different to C.B.'s. From</p> <pre><code>Get-Foo [-foo1] <foo1Arg> [-foo2 <foo2Arg> [-bar <barArg>]] </code></pre> <p>The first argument $foo1 is always mandatory, while if $bar is specified $foo2 must be specified too.</p> <p>So my coding of it w... | 526, 24067 | powershell, powershell-2.0 | <h1>Having a optional parameter that requires another parameter to be present</h1>
<p>Quite simply, how do I initialize the <code>params</code> part of my Powershell Script so I can have a command line arguments like</p>
<pre><code>Get-Foo [-foo1] <foo1Arg> [-foo2 <foo2Arg> [-bar <barArg>]]
</code></... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,764 | bash | # Having a optional parameter that requires another parameter to be present
Quite simply, how do I initialize the `params` part of my Powershell Script so I can have a command line arguments like
```
Get-Foo [-foo1] <foo1Arg> [-foo2 <foo2Arg> [-bar <barArg>]]
```
So the only time I can use `-bar` is when `foo2` has ... | My reading of the original question is slightly different to C.B.'s. From
```
Get-Foo [-foo1] <foo1Arg> [-foo2 <foo2Arg> [-bar <barArg>]]
```
The first argument $foo1 is always mandatory, while if $bar is specified $foo2 must be specified too.
So my coding of it would be to put $foo1 in both parameter sets.
```
fun... |
15763044 | Why can't I pass a directory as an argument to a for loop in bash? | 11 | 2013-04-02 11:33:41 | <p>I have a simple bash script, simple.sh, as follows:</p>
<pre><code>#/usr/local/bin/bash
for i in $1
do
echo The current file is $i
done
</code></pre>
<p>When I run it with the following argument: </p>
<pre><code>./simple.sh /home/test/*
</code></pre>
<p>it would only print and list out the first fi... | 15,465 | 1,835,622 | 2013-04-02 12:39:03 | 15,763,133 | 12 | 2013-04-02 11:37:36 | 1,952,956 | 2013-04-02 11:52:21 | https://stackoverflow.com/q/15763044 | https://stackoverflow.com/a/15763133 | <p>If you take "$1", it is the first file/directory, which is possible!
You should do it in this way:</p>
<pre><code>for i in "$@"
do
echo The current file is ${i}
done
</code></pre>
<p>If you execute it with:</p>
<pre><code>./simple.sh *
</code></pre>
<p>They list you all files of the actual dictionary</p>
<p>"... | <p>If you take "$1", it is the first file/directory, which is possible! You should do it in this way:</p> <pre><code>for i in "$@" do echo The current file is ${i} done </code></pre> <p>If you execute it with:</p> <pre><code>./simple.sh * </code></pre> <p>They list you all files of the actual dictionary</p> <p>"... | 218, 387 | bash, directory | <h1>Why can't I pass a directory as an argument to a for loop in bash?</h1>
<p>I have a simple bash script, simple.sh, as follows:</p>
<pre><code>#/usr/local/bin/bash
for i in $1
do
echo The current file is $i
done
</code></pre>
<p>When I run it with the following argument: </p>
<pre><code>./simple.sh ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,765 | bash | # Why can't I pass a directory as an argument to a for loop in bash?
I have a simple bash script, simple.sh, as follows:
```
#/usr/local/bin/bash
for i in $1
do
echo The current file is $i
done
```
When I run it with the following argument:
```
./simple.sh /home/test/*
```
it would only print and list... | If you take "$1", it is the first file/directory, which is possible!
You should do it in this way:
```
for i in "$@"
do
echo The current file is ${i}
done
```
If you execute it with:
```
./simple.sh *
```
They list you all files of the actual dictionary
"$1" is alphabetical the first file/directory of your curre... |
14106679 | Is there an inline-if with assignment (ternary conditional) in bash? | 11 | 2012-12-31 23:05:15 | <blockquote>
<p><strong>Possible Duplicate:</strong><br>
<a href="https://stackoverflow.com/questions/3953645/ternary-operator-in-bash">Ternary operator (?:) in Bash</a> </p>
</blockquote>
<p>If this were AS3 or Java, I would do the following:</p>
<pre><code>fileName = dirName + "/" + (useDefault ? defaultName... | 20,968 | 617,937 | 2013-01-01 20:43:08 | 14,106,707 | 12 | 2012-12-31 23:11:15 | 827,263 | 2013-01-01 20:43:08 | https://stackoverflow.com/q/14106679 | https://stackoverflow.com/a/14106707 | <p>There is no <code>?:</code> conditional operator in the shell, but you could make the code a little less redundant like this:</p>
<pre><code>if [ $useDefault ]; then
tmpname="$defaultName"
else
tmpname="$customName"
fi
fileName="$dirName/$tmpname.txt"
</code></pre>
<p>Or you could write your own shell func... | <p>There is no <code>?:</code> conditional operator in the shell, but you could make the code a little less redundant like this:</p> <pre><code>if [ $useDefault ]; then tmpname="$defaultName" else tmpname="$customName" fi fileName="$dirName/$tmpname.txt" </code></pre> <p>Or you could write your own shell func... | 387, 390, 2773, 7992 | bash, if-statement, operators, shell | <h1>Is there an inline-if with assignment (ternary conditional) in bash?</h1>
<blockquote>
<p><strong>Possible Duplicate:</strong><br>
<a href="https://stackoverflow.com/questions/3953645/ternary-operator-in-bash">Ternary operator (?:) in Bash</a> </p>
</blockquote>
<p>If this were AS3 or Java, I would do the f... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,766 | bash | # Is there an inline-if with assignment (ternary conditional) in bash?
> **Possible Duplicate:**
> [Ternary operator (?:) in Bash](https://stackoverflow.com/questions/3953645/ternary-operator-in-bash)
If this were AS3 or Java, I would do the following:
```
fileName = dirName + "/" + (useDefault ? defaultName : cus... | There is no `?:` conditional operator in the shell, but you could make the code a little less redundant like this:
```
if [ $useDefault ]; then
tmpname="$defaultName"
else
tmpname="$customName"
fi
fileName="$dirName/$tmpname.txt"
```
Or you could write your own shell function that acts like the `?:` operator:... |
13903312 | Where is the v2.0 and v3.0 folder for PowerShell? | 11 | 2012-12-16 16:40:09 | <p>On my box, I installed PowerShell 2.0, but the $PSHome varialbe always return the path below：</p>
<p>C:\Windows\System32\WindowsPowerShell\v1.0</p>
<p>So, where is the v2.0 or v3.0 folder?</p>
| 13,676 | 264,052 | 2012-12-16 17:01:53 | 13,903,465 | 12 | 2012-12-16 17:01:53 | 526,535 | 2012-12-16 17:01:53 | https://stackoverflow.com/q/13903312 | https://stackoverflow.com/a/13903465 | <p>Just like how 64-bit system files in Windows are in <code>System32</code>, all versions of Powershell install into the path that says <code>v1.0</code>. One of the things that MS doesn't seem to learn from. Didn't you wonder that Powershell script files have the extension <code>ps1</code>, <code>psm1</code> etc?</p>... | <p>Just like how 64-bit system files in Windows are in <code>System32</code>, all versions of Powershell install into the path that says <code>v1.0</code>. One of the things that MS doesn't seem to learn from. Didn't you wonder that Powershell script files have the extension <code>ps1</code>, <code>psm1</code> etc?</p>... | 526, 24067 | powershell, powershell-2.0 | <h1>Where is the v2.0 and v3.0 folder for PowerShell?</h1>
<p>On my box, I installed PowerShell 2.0, but the $PSHome varialbe always return the path below：</p>
<p>C:\Windows\System32\WindowsPowerShell\v1.0</p>
<p>So, where is the v2.0 or v3.0 folder?</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,767 | bash | # Where is the v2.0 and v3.0 folder for PowerShell?
On my box, I installed PowerShell 2.0, but the $PSHome varialbe always return the path below：
C:\Windows\System32\WindowsPowerShell\v1.0
So, where is the v2.0 or v3.0 folder? | Just like how 64-bit system files in Windows are in `System32`, all versions of Powershell install into the path that says `v1.0`. One of the things that MS doesn't seem to learn from. Didn't you wonder that Powershell script files have the extension `ps1`, `psm1` etc? |
13500866 | How to compare hexadecimal numbers with hexadecimal numbers in shell? | 11 | 2012-11-21 19:41:29 | <p>How to compare hexadecimal number with hexadecimal numbers in shell? </p>
| 18,551 | 1,812,956 | 2019-04-04 14:14:10 | 13,503,150 | 12 | 2012-11-21 22:32:22 | 507,519 | 2012-11-21 22:32:22 | https://stackoverflow.com/q/13500866 | https://stackoverflow.com/a/13503150 | <p>At least <code>bash</code> supports hexadecimal integers directly, provided that they are prefixed with <code>0x</code>:</p>
<pre><code>$ [[ 0xdead -lt 0xcafe ]] && echo yes || echo no
no
$ [[ 0xdead -gt 0xcafe ]] && echo yes || echo no
yes
</code></pre>
<p>You just use the comparison operators nor... | <p>At least <code>bash</code> supports hexadecimal integers directly, provided that they are prefixed with <code>0x</code>:</p> <pre><code>$ [[ 0xdead -lt 0xcafe ]] && echo yes || echo no no $ [[ 0xdead -gt 0xcafe ]] && echo yes || echo no yes </code></pre> <p>You just use the comparison operators nor... | 387, 390 | bash, shell | <h1>How to compare hexadecimal numbers with hexadecimal numbers in shell?</h1>
<p>How to compare hexadecimal number with hexadecimal numbers in shell? </p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,768 | bash | # How to compare hexadecimal numbers with hexadecimal numbers in shell?
How to compare hexadecimal number with hexadecimal numbers in shell? | At least `bash` supports hexadecimal integers directly, provided that they are prefixed with `0x`:
```
$ [[ 0xdead -lt 0xcafe ]] && echo yes || echo no
no
$ [[ 0xdead -gt 0xcafe ]] && echo yes || echo no
yes
```
You just use the comparison operators normally... |
9479814 | How to split a string in bash delimited by / | 11 | 2012-02-28 09:57:47 | <p>I have to split a string in a bash script by "/" but I tried:</p>
<pre><code>for i in $(echo $www | tr "/")
</code></pre>
<p>But it did not work, any suggestion ?</p>
<p>Thanks a lot.</p>
| 16,064 | 554,892 | 2012-02-28 14:48:55 | 9,479,906 | 12 | 2012-02-28 10:04:10 | 20,862 | 2012-02-28 10:04:10 | https://stackoverflow.com/q/9479814 | https://stackoverflow.com/a/9479906 | <pre><code>$ IFS=/ read -a foo <<< 'abc def/ghi/jkl'
$ echo "${foo[0]}*${foo[1]}*${foo[2]}"
abc def*ghi*jkl
</code></pre>
| <pre><code>$ IFS=/ read -a foo <<< 'abc def/ghi/jkl' $ echo "${foo[0]}*${foo[1]}*${foo[2]}" abc def*ghi*jkl </code></pre> | 387 | bash | <h1>How to split a string in bash delimited by /</h1>
<p>I have to split a string in a bash script by "/" but I tried:</p>
<pre><code>for i in $(echo $www | tr "/")
</code></pre>
<p>But it did not work, any suggestion ?</p>
<p>Thanks a lot.</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,769 | bash | # How to split a string in bash delimited by /
I have to split a string in a bash script by "/" but I tried:
```
for i in $(echo $www | tr "/")
```
But it did not work, any suggestion ?
Thanks a lot. | ```
$ IFS=/ read -a foo <<< 'abc def/ghi/jkl'
$ echo "${foo[0]}*${foo[1]}*${foo[2]}"
abc def*ghi*jkl
``` |
2361709 | Efficient way to get your IP address in shell scripts | 11 | 2010-03-02 08:25:24 | <p><strong>Context:</strong>
On *nix systems, one may get the IP address of the machine in a shell script this way:</p>
<pre><code>ifconfig | grep 'inet' | grep -v '127.0.0.1' | cut -d: -f2 | awk '{print $1}'
</code></pre>
<p>Or this way too:</p>
<pre><code>ifconfig | grep 'inet' | grep -v '127.0.0.1' | awk '{print ... | 27,630 | 2,050 | 2016-06-23 13:39:30 | 2,362,674 | 12 | 2010-03-02 11:16:42 | 131,527 | 2010-03-02 11:16:42 | https://stackoverflow.com/q/2361709 | https://stackoverflow.com/a/2362674 | <p>you can do it with just one awk command. No need to use too many pipes.</p>
<pre><code>$ ifconfig | awk -F':' '/inet addr/&&!/127.0.0.1/{split($2,_," ");print _[1]}'
</code></pre>
| <p>you can do it with just one awk command. No need to use too many pipes.</p> <pre><code>$ ifconfig | awk -F':' '/inet addr/&&!/127.0.0.1/{split($2,_," ");print _[1]}' </code></pre> | 390, 531, 1231 | command-line, scripting, shell | <h1>Efficient way to get your IP address in shell scripts</h1>
<p><strong>Context:</strong>
On *nix systems, one may get the IP address of the machine in a shell script this way:</p>
<pre><code>ifconfig | grep 'inet' | grep -v '127.0.0.1' | cut -d: -f2 | awk '{print $1}'
</code></pre>
<p>Or this way too:</p>
<pre><c... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,770 | bash | # Efficient way to get your IP address in shell scripts
**Context:**
On *nix systems, one may get the IP address of the machine in a shell script this way:
```
ifconfig | grep 'inet' | grep -v '127.0.0.1' | cut -d: -f2 | awk '{print $1}'
```
Or this way too:
```
ifconfig | grep 'inet' | grep -v '127.0.0.1' | awk '{... | you can do it with just one awk command. No need to use too many pipes.
```
$ ifconfig | awk -F':' '/inet addr/&&!/127.0.0.1/{split($2,_," ");print _[1]}'
``` |
1827862 | What determines whether the Powershell pipeline will unroll a collection? | 11 | 2009-12-01 18:07:20 | <pre><code># array
C:\> (1,2,3).count
3
C:\> (1,2,3 | measure).count
3
# hashtable
C:\> @{1=1; 2=2; 3=3}.count
3
C:\> (@{1=1; 2=2; 3=3} | measure).count
1
# array returned from function
C:\> function UnrollMe { $args }
C:\> (UnrollMe a,b,c).count
3
C:\> (UnrollMe a,b,c | measure).count
1
C:\> ... | 3,833 | 74,439 | 2009-12-02 04:41:07 | 1,829,401 | 12 | 2009-12-01 22:31:21 | 153,982 | 2009-12-02 04:41:07 | https://stackoverflow.com/q/1827862 | https://stackoverflow.com/a/1829401 | <p>$args is unrolled. Remember that function parameters are normally passed using space to separate them. When you pass in 1,2,3 you are passing in a single argument that is an array of three numbers that gets assigned to $args[0]:</p>
<pre><code>PS> function UnrollMe { $args }
PS> UnrollMe 1 2 3 | measure
Cou... | <p>$args is unrolled. Remember that function parameters are normally passed using space to separate them. When you pass in 1,2,3 you are passing in a single argument that is an array of three numbers that gets assigned to $args[0]:</p> <pre><code>PS> function UnrollMe { $args } PS> UnrollMe 1 2 3 | measure Cou... | 343, 526, 629, 2844 | collections, ienumerable, pipeline, powershell | <h1>What determines whether the Powershell pipeline will unroll a collection?</h1>
<pre><code># array
C:\> (1,2,3).count
3
C:\> (1,2,3 | measure).count
3
# hashtable
C:\> @{1=1; 2=2; 3=3}.count
3
C:\> (@{1=1; 2=2; 3=3} | measure).count
1
# array returned from function
C:\> function UnrollMe { $args }
C... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,771 | bash | # What determines whether the Powershell pipeline will unroll a collection?
```
# array
C:\> (1,2,3).count
3
C:\> (1,2,3 | measure).count
3
# hashtable
C:\> @{1=1; 2=2; 3=3}.count
3
C:\> (@{1=1; 2=2; 3=3} | measure).count
1
# array returned from function
C:\> function UnrollMe { $args }
C:\> (UnrollMe a,b,c).count
3... | $args is unrolled. Remember that function parameters are normally passed using space to separate them. When you pass in 1,2,3 you are passing in a single argument that is an array of three numbers that gets assigned to $args[0]:
```
PS> function UnrollMe { $args }
PS> UnrollMe 1 2 3 | measure
Count : 3
```
Puttin... |
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