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17975232 | Shell redirection i/o order | 25 | 2013-07-31 15:58:39 | <p>I'm playing with i/o shell redirection. The commands I've tried (in bash):</p>
<pre><code>ls -al *.xyz 2>&1 1> files.lst
</code></pre>
<p>and</p>
<pre><code>ls -al *.xyz 1> files.lst 2>&1
</code></pre>
<p>There is no any <code>*.xyz</code> file in current folder.</p>
<p>These commands gives ... | 8,887 | 689,990 | 2022-08-25 08:04:42 | 17,975,577 | 15 | 2013-07-31 16:13:57 | 548,225 | 2013-07-31 16:13:57 | https://stackoverflow.com/q/17975232 | https://stackoverflow.com/a/17975577 | <p>This error:</p>
<pre><code>ls: *.xyz: No such file or directory
</code></pre>
<p>is being written on <code>stderr</code> by <code>ls</code> binary.</p>
<p>However in this command:</p>
<pre><code>ls -al *.xyz 2>&1 1> files.lst
</code></pre>
<p><strong>You're first redirecting</strong> <code>stderr</cod... | <p>This error:</p> <pre><code>ls: *.xyz: No such file or directory </code></pre> <p>is being written on <code>stderr</code> by <code>ls</code> binary.</p> <p>However in this command:</p> <pre><code>ls -al *.xyz 2>&1 1> files.lst </code></pre> <p><strong>You're first redirecting</strong> <code>stderr</cod... | 387, 390, 4867, 19156, 26698 | bash, io-redirection, shell, stderr, stdout | <h1>Shell redirection i/o order</h1>
<p>I'm playing with i/o shell redirection. The commands I've tried (in bash):</p>
<pre><code>ls -al *.xyz 2>&1 1> files.lst
</code></pre>
<p>and</p>
<pre><code>ls -al *.xyz 1> files.lst 2>&1
</code></pre>
<p>There is no any <code>*.xyz</code> file in current ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,062 | bash | # Shell redirection i/o order
I'm playing with i/o shell redirection. The commands I've tried (in bash):
```
ls -al *.xyz 2>&1 1> files.lst
```
and
```
ls -al *.xyz 1> files.lst 2>&1
```
There is no any `*.xyz` file in current folder.
These commands gives me the different results. The first command shows an error... | This error:
```
ls: *.xyz: No such file or directory
```
is being written on `stderr` by `ls` binary.
However in this command:
```
ls -al *.xyz 2>&1 1> files.lst
```
**You're first redirecting** `stderr` to `stdout` which by default goes to `tty` (terminal)
And then you're redirecting `stdout` to a file `files.ls... |
12561654 | BASH: difference between "export k=1" vs. "k=1" | 25 | 2012-09-24 08:52:25 | <p>I am going to write an script and It looks there is no difference between:</p>
<pre><code>export k=1
</code></pre>
<p>and</p>
<pre><code>k=1
</code></pre>
<p>Am I right?</p>
| 7,733 | 1,501,388 | 2012-09-24 10:04:58 | 12,562,787 | 15 | 2012-09-24 10:04:58 | 736,308 | 2012-09-24 10:04:58 | https://stackoverflow.com/q/12561654 | https://stackoverflow.com/a/12562787 | <p>Every process, even on Windows, has a block of memory known as the <em>environment block</em>, this contains <em>environment variables</em>. When a new process is created, by default, the environment block of the parent process is copied to the child, so environment variables are a simple way of passing text data ... | <p>Every process, even on Windows, has a block of memory known as the <em>environment block</em>, this contains <em>environment variables</em>. When a new process is created, by default, the environment block of the parent process is copied to the child, so environment variables are a simple way of passing text data ... | 58, 387, 390 | bash, linux, shell | <h1>BASH: difference between "export k=1" vs. "k=1"</h1>
<p>I am going to write an script and It looks there is no difference between:</p>
<pre><code>export k=1
</code></pre>
<p>and</p>
<pre><code>k=1
</code></pre>
<p>Am I right?</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,063 | bash | # BASH: difference between "export k=1" vs. "k=1"
I am going to write an script and It looks there is no difference between:
```
export k=1
```
and
```
k=1
```
Am I right? | Every process, even on Windows, has a block of memory known as the *environment block*, this contains *environment variables*. When a new process is created, by default, the environment block of the parent process is copied to the child, so environment variables are a simple way of passing text data to a child process.... |
5917439 | Bash bad substitution with subshell and substring | 25 | 2011-05-06 21:59:10 | <p>A contrived example... given </p>
<pre><code>FOO="/foo/bar/baz"
</code></pre>
<p>this works (in bash)</p>
<pre><code>BAR=$(basename $FOO) # result is BAR="baz"
BAZ=${BAR:0:1} # result is BAZ="b"
</code></pre>
<p>this doesn't</p>
<pre><code>BAZ=${$(basename $FOO):0:1} # result is bad substitution
</code><... | 42,898 | 123,054 | 2019-09-03 15:02:07 | 5,917,742 | 15 | 2011-05-06 22:39:40 | 107,331 | 2011-05-06 22:39:40 | https://stackoverflow.com/q/5917439 | https://stackoverflow.com/a/5917742 | <p>First off, note that when you say this:</p>
<pre><code>BAR=$(basename $FOO) # result is BAR="baz"
BAZ=${BAR:0:1} # result is BAZ="b"
</code></pre>
<p>the first bit in the construct for <code>BAZ</code> is <code>BAR</code> and not the <em>value</em> that you want to take the first character of. So even if bas... | <p>First off, note that when you say this:</p> <pre><code>BAR=$(basename $FOO) # result is BAR="baz" BAZ=${BAR:0:1} # result is BAZ="b" </code></pre> <p>the first bit in the construct for <code>BAZ</code> is <code>BAR</code> and not the <em>value</em> that you want to take the first character of. So even if bas... | 139, 387, 16107, 57788 | bash, string, subshell, substitution | <h1>Bash bad substitution with subshell and substring</h1>
<p>A contrived example... given </p>
<pre><code>FOO="/foo/bar/baz"
</code></pre>
<p>this works (in bash)</p>
<pre><code>BAR=$(basename $FOO) # result is BAR="baz"
BAZ=${BAR:0:1} # result is BAZ="b"
</code></pre>
<p>this doesn't</p>
<pre><code>BAZ=${... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,064 | bash | # Bash bad substitution with subshell and substring
A contrived example... given
```
FOO="/foo/bar/baz"
```
this works (in bash)
```
BAR=$(basename $FOO) # result is BAR="baz"
BAZ=${BAR:0:1} # result is BAZ="b"
```
this doesn't
```
BAZ=${$(basename $FOO):0:1} # result is bad substitution
```
My question is... | First off, note that when you say this:
```
BAR=$(basename $FOO) # result is BAR="baz"
BAZ=${BAR:0:1} # result is BAZ="b"
```
the first bit in the construct for `BAZ` is `BAR` and not the *value* that you want to take the first character of. So even if bash allowed variable names to contain arbitrary characters... |
54372601 | Running "Git-Clone" from Powershell giving errors even when it seems to work | 24 | 2019-01-25 20:52:22 | <p>How do I interpret the errors coming out of this PowerShell script that calls "Git Clone" (actually using GitLab). And can I clone an empty directory and cause it to work without getting errors?</p>
<pre><code>$path1 = "d:\GitPath"
$path2 = "${path1}\mycompany-mygroup-nealtestautomation01-... | 19,172 | 160,245 | 2025-03-25 18:09:23 | 54,624,579 | 15 | 2019-02-11 05:45:49 | 6,309 | 2025-03-25 18:09:23 | https://stackoverflow.com/q/54372601 | https://stackoverflow.com/a/54624579 | <p>As I mention in "<a href="https://stackoverflow.com/a/47367768/6309">PowerShell Capture Git Output</a>", since a Git command can output information message on stderr (<a href="https://stackoverflow.com/a/37561629/6309">instead of stdout</a>), (for Git 2.16+) try this in the command prompt</p>
<pre><code>se... | <p>As I mention in "<a href="https://stackoverflow.com/a/47367768/6309">PowerShell Capture Git Output</a>", since a Git command can output information message on stderr (<a href="https://stackoverflow.com/a/37561629/6309">instead of stdout</a>), (for Git 2.16+) try this in the command prompt</p> <pre><code>se... | 119, 95686 | git, powershell-4.0 | <h1>Running "Git-Clone" from Powershell giving errors even when it seems to work</h1>
<p>How do I interpret the errors coming out of this PowerShell script that calls "Git Clone" (actually using GitLab). And can I clone an empty directory and cause it to work without getting errors?</p>
<pre><code>$path1 = &... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,065 | bash | # Running "Git-Clone" from Powershell giving errors even when it seems to work
How do I interpret the errors coming out of this PowerShell script that calls "Git Clone" (actually using GitLab). And can I clone an empty directory and cause it to work without getting errors?
```
$path1 = "d:\GitPath"
$path2 = "${path1... | As I mention in "[PowerShell Capture Git Output](https://stackoverflow.com/a/47367768/6309)", since a Git command can output information message on stderr ([instead of stdout](https://stackoverflow.com/a/37561629/6309)), (for Git 2.16+) try this in the command prompt
```
set GIT_REDIRECT_STDERR=2>&1
```
or this comma... |
22996645 | Brace expansion in python glob | 24 | 2014-04-10 18:55:04 | <p>I have python 2.7 and am trying to issue:</p>
<pre><code>glob('{faint,bright*}/{science,calib}/chip?/')
</code></pre>
<p>I obtain no matches, however from the shell <code>echo {faint,bright*}/{science,calib}/chip?</code> gives:</p>
<pre><code>faint/science/chip1 faint/science/chip2 faint/calib/chip1 faint/calib/c... | 12,469 | 1,040,266 | 2024-05-06 03:46:07 | 38,485,954 | 15 | 2016-07-20 16:27:20 | 912,236 | 2022-05-01 15:12:08 | https://stackoverflow.com/q/22996645 | https://stackoverflow.com/a/38485954 | <p>Combining globbing with brace expansion.</p>
<pre><code>pip install braceexpand
</code></pre>
<p>Sample:</p>
<pre class="lang-py prettyprint-override"><code>from glob import glob
from braceexpand import braceexpand
def braced_glob(path):
l = []
for x in braceexpand(path):
l.extend(glob(x))
... | <p>Combining globbing with brace expansion.</p> <pre><code>pip install braceexpand </code></pre> <p>Sample:</p> <pre class="lang-py prettyprint-override"><code>from glob import glob from braceexpand import braceexpand def braced_glob(path): l = [] for x in braceexpand(path): l.extend(glob(x)) ... | 16, 387, 390, 3889, 19863 | bash, expansion, glob, python, shell | <h1>Brace expansion in python glob</h1>
<p>I have python 2.7 and am trying to issue:</p>
<pre><code>glob('{faint,bright*}/{science,calib}/chip?/')
</code></pre>
<p>I obtain no matches, however from the shell <code>echo {faint,bright*}/{science,calib}/chip?</code> gives:</p>
<pre><code>faint/science/chip1 faint/scien... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,066 | bash | # Brace expansion in python glob
I have python 2.7 and am trying to issue:
```
glob('{faint,bright*}/{science,calib}/chip?/')
```
I obtain no matches, however from the shell `echo {faint,bright*}/{science,calib}/chip?` gives:
```
faint/science/chip1 faint/science/chip2 faint/calib/chip1 faint/calib/chip2 bright1/sc... | Combining globbing with brace expansion.
```
pip install braceexpand
```
Sample:
```
from glob import glob
from braceexpand import braceexpand
def braced_glob(path):
l = []
for x in braceexpand(path):
l.extend(glob(x))
return l
```
```
>>> braced_glob('/usr/bin/{x,z}*k')
['/usr/b... |
17945514 | Find files which does not contains selected string | 24 | 2013-07-30 11:14:54 | <p>I am trying to find all files, which does not contains a selected string. Find files which contains is easy:</p>
<pre><code>gci | select-string "something"
</code></pre>
<p>but I do not have an idea how to negate this statement.</p>
| 26,180 | 1,749,895 | 2024-06-27 14:24:19 | 17,945,858 | 15 | 2013-07-30 11:30:23 | 1,324,345 | 2013-07-30 11:30:23 | https://stackoverflow.com/q/17945514 | https://stackoverflow.com/a/17945858 | <p>I'm not sure if it can be done without the <code>foreach-object</code> but this works:</p>
<pre><code>gci |foreach-object{if (-not (select-string -inputobject $_ -Pattern "something")){$_}}
</code></pre>
| <p>I'm not sure if it can be done without the <code>foreach-object</code> but this works:</p> <pre><code>gci |foreach-object{if (-not (select-string -inputobject $_ -Pattern "something")){$_}} </code></pre> | 526 | powershell | <h1>Find files which does not contains selected string</h1>
<p>I am trying to find all files, which does not contains a selected string. Find files which contains is easy:</p>
<pre><code>gci | select-string "something"
</code></pre>
<p>but I do not have an idea how to negate this statement.</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,067 | bash | # Find files which does not contains selected string
I am trying to find all files, which does not contains a selected string. Find files which contains is easy:
```
gci | select-string "something"
```
but I do not have an idea how to negate this statement. | I'm not sure if it can be done without the `foreach-object` but this works:
```
gci |foreach-object{if (-not (select-string -inputobject $_ -Pattern "something")){$_}}
``` |
10481685 | Setting colors for prompt in Git Bash on Windows | 24 | 2012-05-07 11:59:51 | <p>I've successfully played around with some of the color settings in the Git Bash on Windows - I'm able to set a few things, like the colors of the local, the current and remote branches in my <code>.gitconfig</code> file:</p>
<pre><code>[color "branch"]
current = cyan bold
local = cyan
remote = red
</code></pre>
<... | 22,973 | 13,302 | 2023-09-14 11:16:59 | 10,483,234 | 15 | 2012-05-07 13:46:28 | 26,428 | 2012-05-07 13:46:28 | https://stackoverflow.com/q/10481685 | https://stackoverflow.com/a/10483234 | <p>In your <code>.bashrc</code> you can set your prompt using the <code>PS1</code> variable (which is likely set to a global value in <code>/etc/profile</code> or another file in <code>/etc</code> which may be distribution dependent).</p>
<p>Here's an example:</p>
<pre><code>PS1='\[\033[1;36m\]\u@\h:\[\033[0m\]\[\033... | <p>In your <code>.bashrc</code> you can set your prompt using the <code>PS1</code> variable (which is likely set to a global value in <code>/etc/profile</code> or another file in <code>/etc</code> which may be distribution dependent).</p> <p>Here's an example:</p> <pre><code>PS1='\[\033[1;36m\]\u@\h:\[\033[0m\]\[\033... | 119, 387, 21628 | bash, git, msysgit | <h1>Setting colors for prompt in Git Bash on Windows</h1>
<p>I've successfully played around with some of the color settings in the Git Bash on Windows - I'm able to set a few things, like the colors of the local, the current and remote branches in my <code>.gitconfig</code> file:</p>
<pre><code>[color "branch"]
curre... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,068 | bash | # Setting colors for prompt in Git Bash on Windows
I've successfully played around with some of the color settings in the Git Bash on Windows - I'm able to set a few things, like the colors of the local, the current and remote branches in my `.gitconfig` file:
```
[color "branch"]
current = cyan bold
local = cyan
re... | In your `.bashrc` you can set your prompt using the `PS1` variable (which is likely set to a global value in `/etc/profile` or another file in `/etc` which may be distribution dependent).
Here's an example:
```
PS1='\[\033[1;36m\]\u@\h:\[\033[0m\]\[\033[1;34m\]\w\[\033[0m\] \[\033[1;32m\]$(__git_ps1)\[\033[0m\]\$ '
`... |
37035300 | How to determine the default location for openssl.cnf? | 23 | 2016-05-04 18:27:43 | <h1>Background</h1>
<p>I'm writing a bash script that will use openssl to generate a certificate signing request with <em>X509v3 extension compliant</em> subject alternative names.</p>
<p>Since there's no command line option for this, <a href="http://blog.endpoint.com/2014/10/openssl-csr-with-alternative-names-one.ht... | 69,960 | 4,233,593 | 2019-01-21 00:52:58 | 37,042,289 | 15 | 2016-05-05 04:20:33 | 608,639 | 2016-05-05 05:09:34 | https://stackoverflow.com/q/37035300 | https://stackoverflow.com/a/37042289 | <blockquote>
<p>How do I programmatically determine the full path to the openssl default configuration file?</p>
</blockquote>
<p>Programmatically, its as easy as using the <code>OPENSSLDIR</code> macro from <code>opensslconf.h</code>:</p>
<pre class="lang-none prettyprint-override"><code>$ cat /usr/local/ssl/darwi... | <blockquote> <p>How do I programmatically determine the full path to the openssl default configuration file?</p> </blockquote> <p>Programmatically, its as easy as using the <code>OPENSSLDIR</code> macro from <code>opensslconf.h</code>:</p> <pre class="lang-none prettyprint-override"><code>$ cat /usr/local/ssl/darwi... | 387, 1999 | bash, openssl | <h1>How to determine the default location for openssl.cnf?</h1>
<h1>Background</h1>
<p>I'm writing a bash script that will use openssl to generate a certificate signing request with <em>X509v3 extension compliant</em> subject alternative names.</p>
<p>Since there's no command line option for this, <a href="http://blo... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,069 | bash | # How to determine the default location for openssl.cnf?
# Background
I'm writing a bash script that will use openssl to generate a certificate signing request with *X509v3 extension compliant* subject alternative names.
Since there's no command line option for this, [a solution](http://blog.endpoint.com/2014/10/ope... | > How do I programmatically determine the full path to the openssl default configuration file?
Programmatically, its as easy as using the `OPENSSLDIR` macro from `opensslconf.h`:
```
$ cat /usr/local/ssl/darwin/include/openssl/opensslconf.h | grep OPENSSLDIR
#if defined(HEADER_CRYPTLIB_H) && !defined(OPENSSLDIR)
#def... |
27641139 | How can I identify partitions of an Android device from the shell? | 23 | 2014-12-24 18:52:43 | <p>I'm trying to find which partition is used for what, e.g. <code>/boot</code>, <code>/recovery</code>, <code>/system</code>, from <code>adb shell</code>. While this is trivial for partitions currently mounted (using the <code>mount</code> or <code>df</code> commands, see e.g. <a href="https://stackoverflow.com/q/2021... | 68,351 | 2,533,433 | 2015-10-27 11:44:38 | 30,537,731 | 15 | 2015-05-29 19:35:29 | 2,533,433 | 2015-05-29 19:35:29 | https://stackoverflow.com/q/27641139 | https://stackoverflow.com/a/30537731 | <p>As there seems to be no "unique way" to achieve that, I started combining ideas from allover, joining them into a script (or rather a "script library") to have them checked sequentially (until a good hit was made), and integrated that into my "Device Documentation Tool" named <strong><a href="https://github.com/Izzy... | <p>As there seems to be no "unique way" to achieve that, I started combining ideas from allover, joining them into a script (or rather a "script library") to have them checked sequentially (until a good hit was made), and integrated that into my "Device Documentation Tool" named <strong><a href="https://github.com/Izzy... | 390, 1386, 94487 | android, partition, shell | <h1>How can I identify partitions of an Android device from the shell?</h1>
<p>I'm trying to find which partition is used for what, e.g. <code>/boot</code>, <code>/recovery</code>, <code>/system</code>, from <code>adb shell</code>. While this is trivial for partitions currently mounted (using the <code>mount</code> or ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,070 | bash | # How can I identify partitions of an Android device from the shell?
I'm trying to find which partition is used for what, e.g. `/boot`, `/recovery`, `/system`, from `adb shell`. While this is trivial for partitions currently mounted (using the `mount` or `df` commands, see e.g. [how to identify names of the partitions... | As there seems to be no "unique way" to achieve that, I started combining ideas from allover, joining them into a script (or rather a "script library") to have them checked sequentially (until a good hit was made), and integrated that into my "Device Documentation Tool" named **[Adebar](https://github.com/IzzySoft/Adeb... |
27175137 | Powershellv2 - remove last x characters from a string | 23 | 2014-11-27 16:27:44 | <p>I have a file containing a few thousand lines of text. I need to extract some data from it,
but the data I need is always 57 characters from the left, and 37 characters from the end.
The bit I need (in the middle) is of varying length.</p>
<p>e.g. <code>20141126_this_piece_of_text_needs_to_be_removed<b>thi... | 106,182 | 1,532,210 | 2015-09-16 13:05:07 | 27,175,389 | 15 | 2014-11-27 16:40:16 | 3,115,685 | 2014-11-27 16:40:16 | https://stackoverflow.com/q/27175137 | https://stackoverflow.com/a/27175389 | <p>If I understand you correctly, you need this:</p>
<pre><code>$_.substring(57,$_.length-57-37)
</code></pre>
<p>Though this doesn't seem to work precisely with the example you gave but it will give you the varying middle section i.e. starting at 57 chars from the start and ending 37 chars from the end</p>
| <p>If I understand you correctly, you need this:</p> <pre><code>$_.substring(57,$_.length-57-37) </code></pre> <p>Though this doesn't seem to work precisely with the example you gave but it will give you the varying middle section i.e. starting at 57 chars from the start and ending 37 chars from the end</p> | 526, 4371, 24067 | powershell, powershell-2.0, substring | <h1>Powershellv2 - remove last x characters from a string</h1>
<p>I have a file containing a few thousand lines of text. I need to extract some data from it,
but the data I need is always 57 characters from the left, and 37 characters from the end.
The bit I need (in the middle) is of varying length.</p>
<p>e.g. <c... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,071 | bash | # Powershellv2 - remove last x characters from a string
I have a file containing a few thousand lines of text. I need to extract some data from it,
but the data I need is always 57 characters from the left, and 37 characters from the end.
The bit I need (in the middle) is of varying length.
e.g. `20141126_this_piece_... | If I understand you correctly, you need this:
```
$_.substring(57,$_.length-57-37)
```
Though this doesn't seem to work precisely with the example you gave but it will give you the varying middle section i.e. starting at 57 chars from the start and ending 37 chars from the end |
8965887 | Why does `if $(true) ; then ... fi` succeed? | 23 | 2012-01-22 23:59:46 | <p>Inspired by <a href="https://stackoverflow.com/questions/8965509/why-if-ps-aux-grep-always-succeeds-in-bash">this question</a>:</p>
<p>What should an if statement do when the condition is a command substitution where the command produces no output?</p>
<p><strong>NOTE:</strong> The example is <code>if $(true); the... | 6,757 | 827,263 | 2023-03-16 14:09:13 | 8,973,170 | 15 | 2012-01-23 14:30:01 | 140,750 | 2012-01-27 21:25:06 | https://stackoverflow.com/q/8965887 | https://stackoverflow.com/a/8973170 | <p>See section 2.9.1 of the <a href="http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18" rel="noreferrer"> language spec</a>. The last sentence of the first section reads:</p>
<blockquote>
<p>If there is a command name, execution shall continue as described in Command Search and Executi... | <p>See section 2.9.1 of the <a href="http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18" rel="noreferrer"> language spec</a>. The last sentence of the first section reads:</p> <blockquote> <p>If there is a command name, execution shall continue as described in Command Search and Executi... | 387, 1964, 3791, 10327 | bash, ksh, sh, zsh | <h1>Why does `if $(true) ; then ... fi` succeed?</h1>
<p>Inspired by <a href="https://stackoverflow.com/questions/8965509/why-if-ps-aux-grep-always-succeeds-in-bash">this question</a>:</p>
<p>What should an if statement do when the condition is a command substitution where the command produces no output?</p>
<p><stro... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,072 | bash | # Why does `if $(true) ; then ... fi` succeed?
Inspired by [this question](https://stackoverflow.com/questions/8965509/why-if-ps-aux-grep-always-succeeds-in-bash):
What should an if statement do when the condition is a command substitution where the command produces no output?
**NOTE:** The example is `if $(true); t... | See section 2.9.1 of the [language spec](http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18). The last sentence of the first section reads:
> If there is a command name, execution shall continue as described in Command Search and Execution . If there is no command name, but the command co... |
8670001 | How to launch PowerShell (not a script) from the command line | 23 | 2011-12-29 15:53:02 | <p>I am new to PowerShell and am struggling with what I assume should be a simple operation—I am trying to launch a PowesShell window from the command line. </p>
<p>If I launch a command line instance and type either <code>powershell</code> or <code>start powershell</code>, I am getting a PowerShell instance wi... | 187,654 | 306,894 | 2017-06-16 22:34:12 | 8,671,671 | 15 | 2011-12-29 18:18:36 | 9,833 | 2011-12-29 18:18:36 | https://stackoverflow.com/q/8670001 | https://stackoverflow.com/a/8671671 | <p>Set the default console colors and fonts:</p>
<p><a href="http://poshcode.org/2220">http://poshcode.org/2220</a><br>
From Windows PowerShell Cookbook (O'Reilly)<br>
by Lee Holmes (http://www.leeholmes.com/guide) </p>
<pre><code>Set-StrictMode -Version Latest
Push-Location
Set-Location HKCU:\Console
New-Item '.\%... | <p>Set the default console colors and fonts:</p> <p><a href="http://poshcode.org/2220">http://poshcode.org/2220</a><br> From Windows PowerShell Cookbook (O'Reilly)<br> by Lee Holmes (http://www.leeholmes.com/guide) </p> <pre><code>Set-StrictMode -Version Latest Push-Location Set-Location HKCU:\Console New-Item '.\%... | 526, 24067 | powershell, powershell-2.0 | <h1>How to launch PowerShell (not a script) from the command line</h1>
<p>I am new to PowerShell and am struggling with what I assume should be a simple operation—I am trying to launch a PowesShell window from the command line. </p>
<p>If I launch a command line instance and type either <code>powershell</code> ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,073 | bash | # How to launch PowerShell (not a script) from the command line
I am new to PowerShell and am struggling with what I assume should be a simple operation—I am trying to launch a PowesShell window from the command line.
If I launch a command line instance and type either `powershell` or `start powershell`, I am getting... | Set the default console colors and fonts:
<http://poshcode.org/2220>
From Windows PowerShell Cookbook (O'Reilly)
by Lee Holmes (http://www.leeholmes.com/guide)
```
Set-StrictMode -Version Latest
Push-Location
Set-Location HKCU:\Console
New-Item '.\%SystemRoot%_system32_WindowsPowerShell_v1.0_powershell.exe'
Set-... |
1574403 | List all leaf subdirectories in linux | 23 | 2009-10-15 19:09:09 | <p>Is there an easy way to list only directories under a given directory in Linux?
To explain better, I can do:</p>
<pre><code>find mydir -type d
</code></pre>
<p>which gives:</p>
<pre><code>mydir/src
mydir/src/main
mydir/bin
mydir/bin/classes
</code></pre>
<p>What I want instead is:</p>
<pre><code>mydir/src/main
... | 22,490 | 152,833 | 2022-09-18 09:35:01 | 1,574,711 | 15 | 2009-10-15 20:03:47 | 161,126 | 2012-08-22 03:44:29 | https://stackoverflow.com/q/1574403 | https://stackoverflow.com/a/1574711 | <pre><code>find . -type d | sort | awk '$0 !~ last "/" {print last} {last=$0} END {print last}'
</code></pre>
| <pre><code>find . -type d | sort | awk '$0 !~ last "/" {print last} {last=$0} END {print last}' </code></pre> | 387 | bash | <h1>List all leaf subdirectories in linux</h1>
<p>Is there an easy way to list only directories under a given directory in Linux?
To explain better, I can do:</p>
<pre><code>find mydir -type d
</code></pre>
<p>which gives:</p>
<pre><code>mydir/src
mydir/src/main
mydir/bin
mydir/bin/classes
</code></pre>
<p>What I w... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,074 | bash | # List all leaf subdirectories in linux
Is there an easy way to list only directories under a given directory in Linux?
To explain better, I can do:
```
find mydir -type d
```
which gives:
```
mydir/src
mydir/src/main
mydir/bin
mydir/bin/classes
```
What I want instead is:
```
mydir/src/main
mydir/bin/classes
```... | ```
find . -type d | sort | awk '$0 !~ last "/" {print last} {last=$0} END {print last}'
``` |
56108617 | How to pass arguments in command line using dotnet? | 22 | 2019-05-13 08:40:46 | <p>the command
<code>dotnet myapp.dll -- [4, 3, 2]</code> throws the exception <code>System.FormatException: Input string was not in a correct format</code>.
I do not know the syntax. How should I pass arguments correctly?
I use powershell.</p>
| 39,889 | 9,046,018 | 2023-08-24 13:46:07 | 56,109,119 | 15 | 2019-05-13 09:10:47 | 6,270,170 | 2022-04-27 11:12:17 | https://stackoverflow.com/q/56108617 | https://stackoverflow.com/a/56109119 | <pre><code>using System;
namespace ConsoleApp3
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine(string.Join('-', args));
}
}
}
</code></pre>
<p>Call it via Powershell 6:</p>
<pre><code>dotnet .\ConsoleApp3.dll "[1,2,3]"
</code></pre>
<p>Out... | <pre><code>using System; namespace ConsoleApp3 { class Program { static void Main(string[] args) { Console.WriteLine(string.Join('-', args)); } } } </code></pre> <p>Call it via Powershell 6:</p> <pre><code>dotnet .\ConsoleApp3.dll "[1,2,3]" </code></pre> <p>Out... | 1, 9, 526 | .net, c#, powershell | <h1>How to pass arguments in command line using dotnet?</h1>
<p>the command
<code>dotnet myapp.dll -- [4, 3, 2]</code> throws the exception <code>System.FormatException: Input string was not in a correct format</code>.
I do not know the syntax. How should I pass arguments correctly?
I use powershell.</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,075 | bash | # How to pass arguments in command line using dotnet?
the command
`dotnet myapp.dll -- [4, 3, 2]` throws the exception `System.FormatException: Input string was not in a correct format`.
I do not know the syntax. How should I pass arguments correctly?
I use powershell. | ```
using System;
namespace ConsoleApp3
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine(string.Join('-', args));
}
}
}
```
Call it via Powershell 6:
```
dotnet .\ConsoleApp3.dll "[1,2,3]"
```
Output:
```
[1,2,3]
```
In the above call, your `Mai... |
53307844 | [System.Web.Security.Membership]::GeneratePassword() - Type Not found | 22 | 2018-11-14 19:54:46 | <p>Why do I get Type Not Found when trying to use this class/method in PowerShell?</p>
<pre><code> [System.Web.Security.Membership]::GeneratePassword()
</code></pre>
<p>Do I need to install a module or something to make use of it?</p>
| 23,501 | 7,228,003 | 2022-10-21 14:43:24 | 53,308,091 | 15 | 2018-11-14 20:14:32 | 7,228,003 | 2018-11-14 20:14:32 | https://stackoverflow.com/q/53307844 | https://stackoverflow.com/a/53308091 | <p>Load the assembly first:</p>
<pre><code>add-type -AssemblyName System.Web
[System.Web.Security.Membership]::GeneratePassword(10,0)
</code></pre>
| <p>Load the assembly first:</p> <pre><code>add-type -AssemblyName System.Web [System.Web.Security.Membership]::GeneratePassword(10,0) </code></pre> | 220, 526, 5187 | class, passwords, powershell | <h1>[System.Web.Security.Membership]::GeneratePassword() - Type Not found</h1>
<p>Why do I get Type Not Found when trying to use this class/method in PowerShell?</p>
<pre><code> [System.Web.Security.Membership]::GeneratePassword()
</code></pre>
<p>Do I need to install a module or something to make use of it?</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,076 | bash | # [System.Web.Security.Membership]::GeneratePassword() - Type Not found
Why do I get Type Not Found when trying to use this class/method in PowerShell?
```
[System.Web.Security.Membership]::GeneratePassword()
```
Do I need to install a module or something to make use of it? | Load the assembly first:
```
add-type -AssemblyName System.Web
[System.Web.Security.Membership]::GeneratePassword(10,0)
``` |
33911332 | Powershell how to get the ParentProcessID by the ProcessID | 22 | 2015-11-25 08:09:50 | <p>I've problems to get the ParentProcessID from a Process where I have the ProcessID. I tried it like this, this is how it works with the ProcessID:</p>
<pre><code>$p = Get-Process firefox
$p.Id
</code></pre>
<p>But if I try it with the ParentProcessID, it doesn't work:</p>
<pre><code>$p.ParentProcessId
</code></pr... | 37,442 | 4,306,615 | 2025-02-27 18:08:08 | 33,912,278 | 15 | 2015-11-25 09:05:08 | 4,306,615 | 2015-11-25 09:05:08 | https://stackoverflow.com/q/33911332 | https://stackoverflow.com/a/33912278 | <p>This worked for me:</p>
<pre><code>$p = Get-Process firefox
$parent = (gwmi win32_process | ? processid -eq $p.Id).parentprocessid
$parent
</code></pre>
<p>The output is the following:</p>
<pre><code>1596
</code></pre>
<p>And <code>1596</code> is the matching ParentProcessID I've checked it with the ProcessExpl... | <p>This worked for me:</p> <pre><code>$p = Get-Process firefox $parent = (gwmi win32_process | ? processid -eq $p.Id).parentprocessid $parent </code></pre> <p>The output is the following:</p> <pre><code>1596 </code></pre> <p>And <code>1596</code> is the matching ParentProcessID I've checked it with the ProcessExpl... | 526 | powershell | <h1>Powershell how to get the ParentProcessID by the ProcessID</h1>
<p>I've problems to get the ParentProcessID from a Process where I have the ProcessID. I tried it like this, this is how it works with the ProcessID:</p>
<pre><code>$p = Get-Process firefox
$p.Id
</code></pre>
<p>But if I try it with the ParentProces... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,077 | bash | # Powershell how to get the ParentProcessID by the ProcessID
I've problems to get the ParentProcessID from a Process where I have the ProcessID. I tried it like this, this is how it works with the ProcessID:
```
$p = Get-Process firefox
$p.Id
```
But if I try it with the ParentProcessID, it doesn't work:
```
$p.Par... | This worked for me:
```
$p = Get-Process firefox
$parent = (gwmi win32_process | ? processid -eq $p.Id).parentprocessid
$parent
```
The output is the following:
```
1596
```
And `1596` is the matching ParentProcessID I've checked it with the ProcessExplorer. |
22491129 | How to send multipart/form-data with PowerShell Invoke-RestMethod | 22 | 2014-03-18 21:10:00 | <p>I'm trying to send a file via Invoke-RestMethod in a similar context as curl with the -F switch. </p>
<p>Curl Example</p>
<pre><code>curl -F FileName=@"/path-to-file.name" "https://uri-to-post"
</code></pre>
<p>In powershell, I've tried something like this:</p>
<pre><code>$uri = "https://uri-to-post"
$contentTy... | 49,120 | 1,104,690 | 2024-03-14 14:55:53 | 22,563,552 | 15 | 2014-03-21 15:57:54 | 1,104,690 | 2014-03-21 15:57:54 | https://stackoverflow.com/q/22491129 | https://stackoverflow.com/a/22563552 | <p>The problem here was what the API required some additional parameters. Initial request required some parameters to accept raw content and specify filename/size. After setting that and getting back proper link to submit, I was able to use:</p>
<pre><code>Invoke-RestMethod -Uri $uri -Method Post -InFile $filePath -... | <p>The problem here was what the API required some additional parameters. Initial request required some parameters to accept raw content and specify filename/size. After setting that and getting back proper link to submit, I was able to use:</p> <pre><code>Invoke-RestMethod -Uri $uri -Method Post -InFile $filePath -... | 526, 1554 | curl, powershell | <h1>How to send multipart/form-data with PowerShell Invoke-RestMethod</h1>
<p>I'm trying to send a file via Invoke-RestMethod in a similar context as curl with the -F switch. </p>
<p>Curl Example</p>
<pre><code>curl -F FileName=@"/path-to-file.name" "https://uri-to-post"
</code></pre>
<p>In powershell, I've tried s... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,078 | bash | # How to send multipart/form-data with PowerShell Invoke-RestMethod
I'm trying to send a file via Invoke-RestMethod in a similar context as curl with the -F switch.
Curl Example
```
curl -F FileName=@"/path-to-file.name" "https://uri-to-post"
```
In powershell, I've tried something like this:
```
$uri = "https://u... | The problem here was what the API required some additional parameters. Initial request required some parameters to accept raw content and specify filename/size. After setting that and getting back proper link to submit, I was able to use:
```
Invoke-RestMethod -Uri $uri -Method Post -InFile $filePath -ContentType "mul... |
10466749 | Bash: Colored Output with a Variable | 22 | 2012-05-05 23:16:03 | <p>I have the following function:</p>
<pre><code>function pause #for prompted pause until ENTER
{
prompt="$3"
echo -e -n "\E[36m$3" #color output text cyan
echo -e -n '\E[0m' #ends colored output
read -p "$*" #read keys from user until ENTER.
clear
}
pause "Press enter to continue..."
</code></pre... | 32,435 | 1,186,723 | 2019-07-21 19:50:42 | 10,466,944 | 15 | 2012-05-05 23:56:14 | 727,142 | 2012-05-05 23:56:14 | https://stackoverflow.com/q/10466749 | https://stackoverflow.com/a/10466944 | <p>I've slightly changed your code:</p>
<pre><code>#!/bin/bash
function pause() {
prompt="$1"
echo -e -n "\033[1;36m$prompt"
echo -e -n '\033[0m'
read
clear
}
pause "Press enter to continue..."
</code></pre>
<p>What I've changed:</p>
<ol>
<li>You were initializing prompt to $3, when the correct... | <p>I've slightly changed your code:</p> <pre><code>#!/bin/bash function pause() { prompt="$1" echo -e -n "\033[1;36m$prompt" echo -e -n '\033[0m' read clear } pause "Press enter to continue..." </code></pre> <p>What I've changed:</p> <ol> <li>You were initializing prompt to $3, when the correct... | 276, 387 | bash, variables | <h1>Bash: Colored Output with a Variable</h1>
<p>I have the following function:</p>
<pre><code>function pause #for prompted pause until ENTER
{
prompt="$3"
echo -e -n "\E[36m$3" #color output text cyan
echo -e -n '\E[0m' #ends colored output
read -p "$*" #read keys from user until ENTER.
clear
}
p... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,079 | bash | # Bash: Colored Output with a Variable
I have the following function:
```
function pause #for prompted pause until ENTER
{
prompt="$3"
echo -e -n "\E[36m$3" #color output text cyan
echo -e -n '\E[0m' #ends colored output
read -p "$*" #read keys from user until ENTER.
clear
}
pause "Press enter to... | I've slightly changed your code:
```
#!/bin/bash
function pause() {
prompt="$1"
echo -e -n "\033[1;36m$prompt"
echo -e -n '\033[0m'
read
clear
}
pause "Press enter to continue..."
```
What I've changed:
1. You were initializing prompt to $3, when the correct argument was $1
2. The ANSI sequence... |
880467 | Renaming a set of files to 001, 002, | 22 | 2009-05-19 00:38:29 | <p>I originally had a set of images of the form image_001.jpg, image_002.jpg, ...</p>
<p>I went through them and removed several. Now I'd like to rename the leftover files back to image_001.jpg, image_002.jpg, ...</p>
<p>Is there a Linux command that will do this neatly? I'm familiar with rename but can't see anythin... | 29,449 | 37,947 | 2022-03-17 13:48:34 | 880,488 | 15 | 2009-05-19 00:47:32 | 47,773 | 2009-05-19 01:03:24 | https://stackoverflow.com/q/880467 | https://stackoverflow.com/a/880488 | <p>If I understand right, you have e.g. image_001.jpg, image_003.jpg, image_005.jpg, and you want to rename to image_001.jpg, image_002.jpg, image_003.jpg.</p>
<p>EDIT: This is modified to put the temp file in the current directory. As Stephan202 noted, this can make a significant difference if temp is on a different... | <p>If I understand right, you have e.g. image_001.jpg, image_003.jpg, image_005.jpg, and you want to rename to image_001.jpg, image_002.jpg, image_003.jpg.</p> <p>EDIT: This is modified to put the temp file in the current directory. As Stephan202 noted, this can make a significant difference if temp is on a different... | 58, 387, 390, 4510, 5310 | bash, file, linux, rename, shell | <h1>Renaming a set of files to 001, 002,</h1>
<p>I originally had a set of images of the form image_001.jpg, image_002.jpg, ...</p>
<p>I went through them and removed several. Now I'd like to rename the leftover files back to image_001.jpg, image_002.jpg, ...</p>
<p>Is there a Linux command that will do this neatly? ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,080 | bash | # Renaming a set of files to 001, 002,
I originally had a set of images of the form image_001.jpg, image_002.jpg, ...
I went through them and removed several. Now I'd like to rename the leftover files back to image_001.jpg, image_002.jpg, ...
Is there a Linux command that will do this neatly? I'm familiar with renam... | If I understand right, you have e.g. image_001.jpg, image_003.jpg, image_005.jpg, and you want to rename to image_001.jpg, image_002.jpg, image_003.jpg.
EDIT: This is modified to put the temp file in the current directory. As Stephan202 noted, this can make a significant difference if temp is on a different filesystem... |
6018586 | How to handle shell getopts with parameter containing blank spaces | 21 | 2011-05-16 14:03:32 | <p>I'm looking for a way to handle arguments containing blank spaces that has to be parsed
by shell getopts command.</p>
<pre><code>while getopts ":a:i:o:e:v:u:" arg
do
echo "ARG is: $arg" >> /tmp/submit.log
case "$arg" in
a) arg1="$OPTARG" ;;
i) arg2="$OPTARG" ;;
o) arg3="$OPTARG" ;;
...
u) arg... | 29,743 | 71,333 | 2023-09-30 11:50:18 | 6,022,923 | 15 | 2011-05-16 20:23:48 | 387,076 | 2011-05-16 20:23:48 | https://stackoverflow.com/q/6018586 | https://stackoverflow.com/a/6022923 | <p>As <a href="https://stackoverflow.com/users/635608/mat">Mat</a> notes, your script fragment is already correct. If you're invoking your script from a shell, you need to quote arguments properly, e.g.</p>
<pre><code>myscript -u "string with white space"
myscript -u 'string with white space'
myscript -u string\ with\... | <p>As <a href="https://stackoverflow.com/users/635608/mat">Mat</a> notes, your script fragment is already correct. If you're invoking your script from a shell, you need to quote arguments properly, e.g.</p> <pre><code>myscript -u "string with white space" myscript -u 'string with white space' myscript -u string\ with\... | 390, 19020 | getopts, shell | <h1>How to handle shell getopts with parameter containing blank spaces</h1>
<p>I'm looking for a way to handle arguments containing blank spaces that has to be parsed
by shell getopts command.</p>
<pre><code>while getopts ":a:i:o:e:v:u:" arg
do
echo "ARG is: $arg" >> /tmp/submit.log
case "$arg" in
a) ar... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,081 | bash | # How to handle shell getopts with parameter containing blank spaces
I'm looking for a way to handle arguments containing blank spaces that has to be parsed
by shell getopts command.
```
while getopts ":a:i:o:e:v:u:" arg
do
echo "ARG is: $arg" >> /tmp/submit.log
case "$arg" in
a) arg1="$OPTARG" ;;
i) arg2="... | As [Mat](https://stackoverflow.com/users/635608/mat) notes, your script fragment is already correct. If you're invoking your script from a shell, you need to quote arguments properly, e.g.
```
myscript -u "string with white space"
myscript -u 'string with white space'
myscript -u string\ with\ white\ space
myscript -u... |
26167803 | How does /bin/bash -c differ from executing a command directly? | 20 | 2014-10-02 19:06:14 | <p>I'm curious why the commmand:</p>
<pre><code>for f in `/bin/ls /mydir | sort | tail -n 10`; do echo $f; done;
</code></pre>
<p>Outputs the last ten files in /mydir, but</p>
<pre><code>/bin/bash -c "for f in `/bin/ls /mydir | sort | tail -n 10`; do echo $f; done;"
</code></pre>
<p>Outputs "syntax error near unexp... | 28,568 | 384,164 | 2014-10-02 19:13:59 | 26,167,919 | 15 | 2014-10-02 19:13:59 | 1,204,143 | 2014-10-02 19:13:59 | https://stackoverflow.com/q/26167803 | https://stackoverflow.com/a/26167919 | <p>You are using double-quotes, so the parent shell is interpolating backticks and variables before passing the argument to <code>/bin/bash</code>.</p>
<p>Thus, your <code>/bin/bash</code> is receiving the following arguments:</p>
<pre><code>-c "for f in x
y
z
...
; do echo ; done;"
</code></pre>
<p>which is a synta... | <p>You are using double-quotes, so the parent shell is interpolating backticks and variables before passing the argument to <code>/bin/bash</code>.</p> <p>Thus, your <code>/bin/bash</code> is receiving the following arguments:</p> <pre><code>-c "for f in x y z ... ; do echo ; done;" </code></pre> <p>which is a synta... | 387 | bash | <h1>How does /bin/bash -c differ from executing a command directly?</h1>
<p>I'm curious why the commmand:</p>
<pre><code>for f in `/bin/ls /mydir | sort | tail -n 10`; do echo $f; done;
</code></pre>
<p>Outputs the last ten files in /mydir, but</p>
<pre><code>/bin/bash -c "for f in `/bin/ls /mydir | sort | tail -n 1... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,082 | bash | # How does /bin/bash -c differ from executing a command directly?
I'm curious why the commmand:
```
for f in `/bin/ls /mydir | sort | tail -n 10`; do echo $f; done;
```
Outputs the last ten files in /mydir, but
```
/bin/bash -c "for f in `/bin/ls /mydir | sort | tail -n 10`; do echo $f; done;"
```
Outputs "syntax ... | You are using double-quotes, so the parent shell is interpolating backticks and variables before passing the argument to `/bin/bash`.
Thus, your `/bin/bash` is receiving the following arguments:
```
-c "for f in x
y
z
...
; do echo ; done;"
```
which is a syntax error.
To avoid this, use single quotes to pass your ... |
25467090 | How to run SWI-Prolog from the command line? | 20 | 2014-08-23 22:53:21 | <p>Is there a way to just create a prolog script called <code>hello.pl</code> like this:</p>
<pre><code>#!/usr/local/bin/swipl -q -s -t main
main:-
write('Hello World\n').
</code></pre>
<p>And be able to run it from the terminal like this?</p>
<pre><code>$ hello.pl
Hello World
$
</code></pre>
<p>When I do that i... | 25,834 | 169,992 | 2019-07-06 02:19:18 | 25,467,219 | 15 | 2014-08-23 23:16:46 | 874,024 | 2014-08-24 07:27:57 | https://stackoverflow.com/q/25467090 | https://stackoverflow.com/a/25467219 | <p>ISO directive: <a href="http://www.swi-prolog.org/pldoc/doc_for?object=%28initialization%29/1">initialization</a>. This should work.</p>
<pre><code>:- initialization main.
main :-
write('Hello World\n').
</code></pre>
<p><em>edit</em> sorry, I skipped over most interesting details. Here is a sample script, let'... | <p>ISO directive: <a href="http://www.swi-prolog.org/pldoc/doc_for?object=%28initialization%29/1">initialization</a>. This should work.</p> <pre><code>:- initialization main. main :- write('Hello World\n'). </code></pre> <p><em>edit</em> sorry, I skipped over most interesting details. Here is a sample script, let'... | 390, 1135, 1231, 8746, 31102 | command-line, executable, prolog, shell, swi-prolog | <h1>How to run SWI-Prolog from the command line?</h1>
<p>Is there a way to just create a prolog script called <code>hello.pl</code> like this:</p>
<pre><code>#!/usr/local/bin/swipl -q -s -t main
main:-
write('Hello World\n').
</code></pre>
<p>And be able to run it from the terminal like this?</p>
<pre><code>$ hel... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,083 | bash | # How to run SWI-Prolog from the command line?
Is there a way to just create a prolog script called `hello.pl` like this:
```
#!/usr/local/bin/swipl -q -s -t main
main:-
write('Hello World\n').
```
And be able to run it from the terminal like this?
```
$ hello.pl
Hello World
$
```
When I do that it gives me thi... | ISO directive: [initialization](http://www.swi-prolog.org/pldoc/doc_for?object=%28initialization%29/1). This should work.
```
:- initialization main.
main :-
write('Hello World\n').
```
*edit* sorry, I skipped over most interesting details. Here is a sample script, let's say saved in ~/test/main.pl
```
#!/home/ca... |
15201763 | IntelliJ does not recognize PATH variable | 20 | 2013-03-04 12:36:46 | <p>I recently tried to import an existing Gradle project, using the option "Open Project" in the startup window and the existing build.gradle file to automatically set-up the project. </p>
<p>Right after I did this, an error message appeared in IntelliJ, saying: </p>
<blockquote>
<p>Could not fetch model of type 'B... | 23,031 | 2,104,921 | 2023-11-30 05:20:14 | 15,201,881 | 15 | 2013-03-04 12:43:20 | 575,421 | 2023-11-30 05:20:14 | https://stackoverflow.com/q/15201763 | https://stackoverflow.com/a/15201881 | <p>Check this post: <a href="https://emmanuelbernard.com/blog/2012/05/09/setting-global-variables-intellij/" rel="nofollow noreferrer">https://emmanuelbernard.com/blog/2012/05/09/setting-global-variables-intellij/</a> The problem is that IDEA doesn't read your <code>.zshrc</code> file and doesn't know about path to pla... | <p>Check this post: <a href="https://emmanuelbernard.com/blog/2012/05/09/setting-global-variables-intellij/" rel="nofollow noreferrer">https://emmanuelbernard.com/blog/2012/05/09/setting-global-variables-intellij/</a> The problem is that IDEA doesn't read your <code>.zshrc</code> file and doesn't know about path to pla... | 17, 390, 6268, 8945, 9013 | environment-variables, intellij-idea, java, path, shell | <h1>IntelliJ does not recognize PATH variable</h1>
<p>I recently tried to import an existing Gradle project, using the option "Open Project" in the startup window and the existing build.gradle file to automatically set-up the project. </p>
<p>Right after I did this, an error message appeared in IntelliJ, saying: </p>
... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,084 | bash | # IntelliJ does not recognize PATH variable
I recently tried to import an existing Gradle project, using the option "Open Project" in the startup window and the existing build.gradle file to automatically set-up the project.
Right after I did this, an error message appeared in IntelliJ, saying:
> Could not fetch mod... | Check this post: <https://emmanuelbernard.com/blog/2012/05/09/setting-global-variables-intellij/> The problem is that IDEA doesn't read your `.zshrc` file and doesn't know about path to play. Try to set PATH variable manually in IDEA settings. |
11935480 | How do I maintain the version number of my bash script which is git source controlled? | 20 | 2012-08-13 13:40:02 | <p>I've just finished the first working version of a more complex bash script, and I'm wrapping my head around on how to maintain the scripts version.</p>
<p>Why do I need this? Following <a href="http://www.gnu.org/prep/standards/html_node/Command_002dLine-Interfaces.html" rel="noreferrer">GNU Coding Standards For Co... | 9,028 | 1,178,669 | 2018-09-05 13:26:27 | 11,936,605 | 15 | 2012-08-13 14:41:49 | 233,485 | 2012-08-13 14:41:49 | https://stackoverflow.com/q/11935480 | https://stackoverflow.com/a/11936605 | <p>As far as I can tell, what you want is impossible. In order to have the version number be committed into the version control software, you'd have to edit the version number, commit, then tag; not the other way around. You can however have the process a little more streamlined.</p>
<p>We can do this by writing a pos... | <p>As far as I can tell, what you want is impossible. In order to have the version number be committed into the version control software, you'd have to edit the version number, commit, then tag; not the other way around. You can however have the process a little more streamlined.</p> <p>We can do this by writing a pos... | 119, 387, 5792 | bash, git, version | <h1>How do I maintain the version number of my bash script which is git source controlled?</h1>
<p>I've just finished the first working version of a more complex bash script, and I'm wrapping my head around on how to maintain the scripts version.</p>
<p>Why do I need this? Following <a href="http://www.gnu.org/prep/st... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,085 | bash | # How do I maintain the version number of my bash script which is git source controlled?
I've just finished the first working version of a more complex bash script, and I'm wrapping my head around on how to maintain the scripts version.
Why do I need this? Following [GNU Coding Standards For Commandline Interfaces](h... | As far as I can tell, what you want is impossible. In order to have the version number be committed into the version control software, you'd have to edit the version number, commit, then tag; not the other way around. You can however have the process a little more streamlined.
We can do this by writing a post-commit h... |
9673730 | Interacting with bash from python | 20 | 2012-03-12 19:43:25 | <p>I've been playing around with Python's <code>subprocess</code> module and I wanted to do an "interactive session" with bash from python. I want to be able to read bash output/write commands from Python just like I do on a terminal emulator. I guess a code example explains it better:</p>
<pre><code>>>> proc... | 45,408 | 1,264,974 | 2024-09-03 08:10:52 | 9,674,162 | 15 | 2012-03-12 20:17:21 | 170,614 | 2024-09-03 08:10:52 | https://stackoverflow.com/q/9673730 | https://stackoverflow.com/a/9674162 | <p>Try with this example:</p>
<pre class="lang-py prettyprint-override"><code>import subprocess
proc = subprocess.Popen(['/bin/bash'], stdin=subprocess.PIPE, stdout=subprocess.PIPE)
stdout = proc.communicate('ls -lash')
print(stdout)
</code></pre>
<p>You have to read more about stdin, stdout and stderr. This looks lik... | <p>Try with this example:</p> <pre class="lang-py prettyprint-override"><code>import subprocess proc = subprocess.Popen(['/bin/bash'], stdin=subprocess.PIPE, stdout=subprocess.PIPE) stdout = proc.communicate('ls -lash') print(stdout) </code></pre> <p>You have to read more about stdin, stdout and stderr. This looks lik... | 16, 387, 2348 | bash, python, subprocess | <h1>Interacting with bash from python</h1>
<p>I've been playing around with Python's <code>subprocess</code> module and I wanted to do an "interactive session" with bash from python. I want to be able to read bash output/write commands from Python just like I do on a terminal emulator. I guess a code example explains i... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,086 | bash | # Interacting with bash from python
I've been playing around with Python's `subprocess` module and I wanted to do an "interactive session" with bash from python. I want to be able to read bash output/write commands from Python just like I do on a terminal emulator. I guess a code example explains it better:
```
>>> p... | Try with this example:
```
import subprocess
proc = subprocess.Popen(['/bin/bash'], stdin=subprocess.PIPE, stdout=subprocess.PIPE)
stdout = proc.communicate('ls -lash')
print(stdout)
```
You have to read more about stdin, stdout and stderr. This looks like good lecture: <http://www.doughellmann.com/PyMOTW/subprocess... |
6713391 | Can bash completion be invoked programmatically? | 20 | 2011-07-15 21:34:46 | <p>What I want is a function I can call from a program so it completes the way bash would given a commandline and a location where TAB was pressed.</p>
<pre><code>. /etc/bash_completion
generate_completions "command arg1 arg2" 17
</code></pre>
<p>would return the same thing as </p>
<pre><code>command arg1 arg2[TAB]
... | 2,136 | 245,173 | 2014-09-05 21:00:24 | 6,741,838 | 15 | 2011-07-19 02:56:42 | 590,042 | 2011-07-19 02:56:42 | https://stackoverflow.com/q/6713391 | https://stackoverflow.com/a/6741838 | <p>I actually had to do this to figure out how apt-get autocomplete works on ubuntu (built my own pseudo-repository tool :)</p>
<p>This is a multistep process:</p>
<p>First, <code>complete -p</code> will give you a listing of all completions in the form of a set of commands you can run to replicate the configuration.... | <p>I actually had to do this to figure out how apt-get autocomplete works on ubuntu (built my own pseudo-repository tool :)</p> <p>This is a multistep process:</p> <p>First, <code>complete -p</code> will give you a listing of all completions in the form of a set of commands you can run to replicate the configuration.... | 387, 59778 | bash, bash-completion | <h1>Can bash completion be invoked programmatically?</h1>
<p>What I want is a function I can call from a program so it completes the way bash would given a commandline and a location where TAB was pressed.</p>
<pre><code>. /etc/bash_completion
generate_completions "command arg1 arg2" 17
</code></pre>
<p>would return ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,087 | bash | # Can bash completion be invoked programmatically?
What I want is a function I can call from a program so it completes the way bash would given a commandline and a location where TAB was pressed.
```
. /etc/bash_completion
generate_completions "command arg1 arg2" 17
```
would return the same thing as
```
command ar... | I actually had to do this to figure out how apt-get autocomplete works on ubuntu (built my own pseudo-repository tool :)
This is a multistep process:
First, `complete -p` will give you a listing of all completions in the form of a set of commands you can run to replicate the configuration. For example, lets say you w... |
3524978 | Logging functions in bash and stdout | 20 | 2010-08-19 18:26:09 | <p>I'd like to be able to put log messages in the middle of bash functions, without affecting the output of those very functions. For example, consider the following functions <code>log()</code> and <code>get_animals()</code>:</p>
<pre><code># print a log a message
log ()
{
echo "Log message: $1"
}
get_animals()... | 37,416 | 393,583 | 2023-04-24 07:45:24 | 3,525,054 | 15 | 2010-08-19 18:36:08 | 350,890 | 2010-08-19 22:54:24 | https://stackoverflow.com/q/3524978 | https://stackoverflow.com/a/3525054 | <p>You can redirect the output to the sdterr error file on file handle 2 using >&2 </p>
<p>example :</p>
<pre><code># print a log a message
log ()
{
echo "Log message: $1" >&2
}
get_animals()
{
log "Fetching animals"
echo "cat dog mouse"
}
values=`get_animals`
echo $values
</code></pre>
<p>the `` only t... | <p>You can redirect the output to the sdterr error file on file handle 2 using >&2 </p> <p>example :</p> <pre><code># print a log a message log () { echo "Log message: $1" >&2 } get_animals() { log "Fetching animals" echo "cat dog mouse" } values=`get_animals` echo $values </code></pre> <p>the `` only t... | 387, 942, 4867 | bash, logging, stdout | <h1>Logging functions in bash and stdout</h1>
<p>I'd like to be able to put log messages in the middle of bash functions, without affecting the output of those very functions. For example, consider the following functions <code>log()</code> and <code>get_animals()</code>:</p>
<pre><code># print a log a message
log ()... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,088 | bash | # Logging functions in bash and stdout
I'd like to be able to put log messages in the middle of bash functions, without affecting the output of those very functions. For example, consider the following functions `log()` and `get_animals()`:
```
# print a log a message
log ()
{
echo "Log message: $1"
}
get_animal... | You can redirect the output to the sdterr error file on file handle 2 using >&2
example :
```
# print a log a message
log ()
{
echo "Log message: $1" >&2
}
get_animals()
{
log "Fetching animals"
echo "cat dog mouse"
}
values=`get_animals`
echo $values
```
the `` only take the output on stdout, not on stderr. The c... |
43213624 | How can I automatically syntax check a powershell script file? | 19 | 2017-04-04 17:13:18 | <p>I want to write a unit-test for some code which generates a powershell script and then check that the script has valid syntax.</p>
<p>What's a good way to do this without actually executing the script?</p>
<p>A .NET code solution is ideal, but a command line solution that I could use by launching an external proce... | 30,073 | 234,288 | 2021-12-10 14:58:56 | 43,214,144 | 15 | 2017-04-04 17:44:49 | 712,649 | 2019-04-29 15:27:05 | https://stackoverflow.com/q/43213624 | https://stackoverflow.com/a/43214144 | <p>You could run your code through the <a href="https://msdn.microsoft.com/en-us/library/system.management.automation.language.parser(v=vs.85).aspx" rel="noreferrer"><code>Parser</code></a> and observe if it raises any errors:</p>
<pre><code># Empty collection for errors
$Errors = @()
# Define input script
$inputScri... | <p>You could run your code through the <a href="https://msdn.microsoft.com/en-us/library/system.management.automation.language.parser(v=vs.85).aspx" rel="noreferrer"><code>Parser</code></a> and observe if it raises any errors:</p> <pre><code># Empty collection for errors $Errors = @() # Define input script $inputScri... | 355, 526 | powershell, validation | <h1>How can I automatically syntax check a powershell script file?</h1>
<p>I want to write a unit-test for some code which generates a powershell script and then check that the script has valid syntax.</p>
<p>What's a good way to do this without actually executing the script?</p>
<p>A .NET code solution is ideal, but... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,089 | bash | # How can I automatically syntax check a powershell script file?
I want to write a unit-test for some code which generates a powershell script and then check that the script has valid syntax.
What's a good way to do this without actually executing the script?
A .NET code solution is ideal, but a command line solutio... | You could run your code through the [`Parser`](https://msdn.microsoft.com/en-us/library/system.management.automation.language.parser(v=vs.85).aspx) and observe if it raises any errors:
```
# Empty collection for errors
$Errors = @()
# Define input script
$inputScript = 'Do-Something -Param 1,2,3,'
[void][System.Mana... |
20330385 | Cannot find the file specified when using subprocess.call('dir', shell=True) in Python | 19 | 2013-12-02 14:14:57 | <p>In a 64-bit system with 32 bit python 2.7 installed I am trying to do the following:</p>
<pre><code>import subprocess
p = subprocess.call('dir', shell=True)
print p
</code></pre>
<p>But this gives me:</p>
<pre><code>Traceback (most recent call last):
File "test.py", line 2, in <module>
p = subprocess.... | 42,045 | 2,996,272 | 2019-07-21 11:15:16 | 20,335,954 | 15 | 2013-12-02 19:10:29 | 722,332 | 2013-12-02 19:10:29 | https://stackoverflow.com/q/20330385 | https://stackoverflow.com/a/20335954 | <p>I think you may have a problem with your <code>COMSPEC</code> environment variable:</p>
<pre><code>>>> import os
>>> os.environ['COMSPEC']
'C:\\Windows\\system32\\cmd.exe'
>>> import subprocess
>>> subprocess.call('dir', shell=True)
(normal output here)
>>> os.envi... | <p>I think you may have a problem with your <code>COMSPEC</code> environment variable:</p> <pre><code>>>> import os >>> os.environ['COMSPEC'] 'C:\\Windows\\system32\\cmd.exe' >>> import subprocess >>> subprocess.call('dir', shell=True) (normal output here) >>> os.envi... | 16, 390, 2348, 6268, 59047 | path, python, python-2.7, shell, subprocess | <h1>Cannot find the file specified when using subprocess.call('dir', shell=True) in Python</h1>
<p>In a 64-bit system with 32 bit python 2.7 installed I am trying to do the following:</p>
<pre><code>import subprocess
p = subprocess.call('dir', shell=True)
print p
</code></pre>
<p>But this gives me:</p>
<pre><code>Tr... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,090 | bash | # Cannot find the file specified when using subprocess.call('dir', shell=True) in Python
In a 64-bit system with 32 bit python 2.7 installed I am trying to do the following:
```
import subprocess
p = subprocess.call('dir', shell=True)
print p
```
But this gives me:
```
Traceback (most recent call last):
File "tes... | I think you may have a problem with your `COMSPEC` environment variable:
```
>>> import os
>>> os.environ['COMSPEC']
'C:\\Windows\\system32\\cmd.exe'
>>> import subprocess
>>> subprocess.call('dir', shell=True)
(normal output here)
>>> os.environ['COMSPEC'] = 'C:\\nonexistent.exe'
>>> subprocess.call('dir', shel... |
19943482 | Configure shell to always print prompt on new line, like zsh | 19 | 2013-11-13 01:23:34 | <p>If a command's output does not end with a <code>\n</code>, the next prompt appears, awkwardly, immediately afterwards:</p>
<pre><code>$ echo -n hai
hai$
</code></pre>
<p>I just noticed a colleague whose shell (zsh, for what it's worth) is configured to print a <code>%</code> (with background and foreground colours... | 6,673 | 312,785 | 2013-11-24 09:03:29 | 20,156,527 | 15 | 2013-11-22 23:42:22 | 1,815,797 | 2013-11-24 09:03:29 | https://stackoverflow.com/q/19943482 | https://stackoverflow.com/a/20156527 | <p>A little trick using <a href="http://www.gnu.org/software/bash/manual/bashref.html#Printing-a-Prompt" rel="noreferrer"><code>PROMPT_COMMAND</code></a>:</p>
<blockquote>
<p>The value of the variable <code>PROMPT_COMMAND</code> is examined just before Bash prints each primary prompt. If <code>PROMPT_COMMAND</code> ... | <p>A little trick using <a href="http://www.gnu.org/software/bash/manual/bashref.html#Printing-a-Prompt" rel="noreferrer"><code>PROMPT_COMMAND</code></a>:</p> <blockquote> <p>The value of the variable <code>PROMPT_COMMAND</code> is examined just before Bash prints each primary prompt. If <code>PROMPT_COMMAND</code> ... | 387, 390, 5003 | bash, prompt, shell | <h1>Configure shell to always print prompt on new line, like zsh</h1>
<p>If a command's output does not end with a <code>\n</code>, the next prompt appears, awkwardly, immediately afterwards:</p>
<pre><code>$ echo -n hai
hai$
</code></pre>
<p>I just noticed a colleague whose shell (zsh, for what it's worth) is config... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,091 | bash | # Configure shell to always print prompt on new line, like zsh
If a command's output does not end with a `\n`, the next prompt appears, awkwardly, immediately afterwards:
```
$ echo -n hai
hai$
```
I just noticed a colleague whose shell (zsh, for what it's worth) is configured to print a `%` (with background and for... | A little trick using [`PROMPT_COMMAND`](http://www.gnu.org/software/bash/manual/bashref.html#Printing-a-Prompt):
> The value of the variable `PROMPT_COMMAND` is examined just before Bash prints each primary prompt. If `PROMPT_COMMAND` is set and has a non-null value, then the value is executed just as if it had been t... |
19530429 | Rename file by removing last n characters | 19 | 2013-10-23 00:01:33 | <p>I want to rename files by removing the last N characters</p>
<p>For example I want to rename these files by removing the last 7 characters</p>
<p>From:</p>
<pre><code>file.txt.123456
</code></pre>
<p>To:</p>
<pre><code>file.txt
</code></pre>
<p>Is this doable in a single command?</p>
| 47,866 | 2,771,455 | 2022-06-07 09:17:59 | 19,531,512 | 15 | 2013-10-23 02:05:03 | 1,126,841 | 2013-10-23 20:16:25 | https://stackoverflow.com/q/19530429 | https://stackoverflow.com/a/19531512 | <p>You can remove a fixed number of characters using</p>
<pre><code>mv "$file" "${file%???????}" # 7 question marks to match 7 characters
</code></pre>
<p>This will work in any POSIX-compliant shell.</p>
<p>To remove the last extension (which may be more or less than 7 characters), use</p>
<pre><code>mv "$file" "$... | <p>You can remove a fixed number of characters using</p> <pre><code>mv "$file" "${file%???????}" # 7 question marks to match 7 characters </code></pre> <p>This will work in any POSIX-compliant shell.</p> <p>To remove the last extension (which may be more or less than 7 characters), use</p> <pre><code>mv "$file" "$... | 34, 390 | shell, unix | <h1>Rename file by removing last n characters</h1>
<p>I want to rename files by removing the last N characters</p>
<p>For example I want to rename these files by removing the last 7 characters</p>
<p>From:</p>
<pre><code>file.txt.123456
</code></pre>
<p>To:</p>
<pre><code>file.txt
</code></pre>
<p>Is this doable ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,092 | bash | # Rename file by removing last n characters
I want to rename files by removing the last N characters
For example I want to rename these files by removing the last 7 characters
From:
```
file.txt.123456
```
To:
```
file.txt
```
Is this doable in a single command? | You can remove a fixed number of characters using
```
mv "$file" "${file%???????}" # 7 question marks to match 7 characters
```
This will work in any POSIX-compliant shell.
To remove the last extension (which may be more or less than 7 characters), use
```
mv "$file" "${file%.*}"
```
To trim everything after a gi... |
12474172 | How to find network interface name | 19 | 2012-09-18 09:31:04 | <p>I have a bash script that runs on a variety of different Ubuntu Linux machines. Its job is to find out the LAN IPv4 address of the localhost.</p>
<p>The script is using </p>
<pre><code>ip addr show eth0 | sed -n '/inet /{s/^.*inet \([0-9.]\+\).*$/\1/;p}'
</code></pre>
<p>which is fine, but some machines for some ... | 68,437 | 623,519 | 2024-03-24 09:55:37 | 16,469,143 | 15 | 2013-05-09 18:59:32 | 81,636 | 2013-05-09 18:59:32 | https://stackoverflow.com/q/12474172 | https://stackoverflow.com/a/16469143 | <p>Not sure if this helps, but it seems that <code>ip route get</code> will show which interface it uses to connect to a remote host.</p>
<pre><code>ubuntu@ip-10-40-24-21:/nail/srv/elasticsearch$ ip route get 8.8.8.8
8.8.8.8 via <gateway address> dev eth0 src <eth0 IP Address>
</code></pre>
<p>of course ... | <p>Not sure if this helps, but it seems that <code>ip route get</code> will show which interface it uses to connect to a remote host.</p> <pre><code>ubuntu@ip-10-40-24-21:/nail/srv/elasticsearch$ ip route get 8.8.8.8 8.8.8.8 via <gateway address> dev eth0 src <eth0 IP Address> </code></pre> <p>of course ... | 58, 294, 387, 5282 | bash, ip, linux, sed | <h1>How to find network interface name</h1>
<p>I have a bash script that runs on a variety of different Ubuntu Linux machines. Its job is to find out the LAN IPv4 address of the localhost.</p>
<p>The script is using </p>
<pre><code>ip addr show eth0 | sed -n '/inet /{s/^.*inet \([0-9.]\+\).*$/\1/;p}'
</code></pre>
<... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,093 | bash | # How to find network interface name
I have a bash script that runs on a variety of different Ubuntu Linux machines. Its job is to find out the LAN IPv4 address of the localhost.
The script is using
```
ip addr show eth0 | sed -n '/inet /{s/^.*inet \([0-9.]\+\).*$/\1/;p}'
```
which is fine, but some machines for so... | Not sure if this helps, but it seems that `ip route get` will show which interface it uses to connect to a remote host.
```
ubuntu@ip-10-40-24-21:/nail/srv/elasticsearch$ ip route get 8.8.8.8
8.8.8.8 via <gateway address> dev eth0 src <eth0 IP Address>
```
of course you could automate that in shell script with somet... |
15807496 | Adding and removing extensionattribute to AD object | 19 | 2013-04-04 09:32:13 | <p>I'm using powershell to modify some AD extensionattribute.</p>
<p>This is my code to add an extensionattribute</p>
<pre><code>Set-ADUser -Identity "anyUser" -Add @{extensionAttribute4="myString"}
</code></pre>
<p>It works, but how can I remove the same extensionattribute? I can't find anything similar to <code>-r... | 292,970 | 1,303,090 | 2016-06-19 10:42:12 | 15,808,034 | 15 | 2013-04-04 09:57:22 | 2,215,029 | 2013-04-04 09:57:22 | https://stackoverflow.com/q/15807496 | https://stackoverflow.com/a/15808034 | <p>You could try using the <code>-Clear</code> parameter </p>
<p>Example:<code>-Clear Attribute1LDAPDisplayName, Attribute2LDAPDisplayName</code></p>
<p><a href="http://technet.microsoft.com/en-us/library/ee617215.aspx">http://technet.microsoft.com/en-us/library/ee617215.aspx</a></p>
| <p>You could try using the <code>-Clear</code> parameter </p> <p>Example:<code>-Clear Attribute1LDAPDisplayName, Attribute2LDAPDisplayName</code></p> <p><a href="http://technet.microsoft.com/en-us/library/ee617215.aspx">http://technet.microsoft.com/en-us/library/ee617215.aspx</a></p> | 526, 10401 | active-directory, powershell | <h1>Adding and removing extensionattribute to AD object</h1>
<p>I'm using powershell to modify some AD extensionattribute.</p>
<p>This is my code to add an extensionattribute</p>
<pre><code>Set-ADUser -Identity "anyUser" -Add @{extensionAttribute4="myString"}
</code></pre>
<p>It works, but how can I remove the same ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,094 | bash | # Adding and removing extensionattribute to AD object
I'm using powershell to modify some AD extensionattribute.
This is my code to add an extensionattribute
```
Set-ADUser -Identity "anyUser" -Add @{extensionAttribute4="myString"}
```
It works, but how can I remove the same extensionattribute? I can't find anythin... | You could try using the `-Clear` parameter
Example:`-Clear Attribute1LDAPDisplayName, Attribute2LDAPDisplayName`
<http://technet.microsoft.com/en-us/library/ee617215.aspx> |
11542243 | Finding number of child processes | 19 | 2012-07-18 13:12:47 | <p>How do find the number of child processes of a bash script, from within the script itself?</p>
| 20,204 | 51,197 | 2019-09-20 18:59:14 | 11,542,363 | 15 | 2012-07-18 13:18:29 | 1,135,819 | 2012-07-18 14:23:46 | https://stackoverflow.com/q/11542243 | https://stackoverflow.com/a/11542363 | <p>To obtain the PID of the bash script you can use variable <code>$$</code>.</p>
<p>Then, to obtain its children, you can run:</p>
<pre><code>bash_pid=$$
children=`ps -eo ppid | grep -w $bash_pid`
</code></pre>
<p><code>ps</code> will return the list of parent PIDs. Then <code>grep</code> filters all the processes ... | <p>To obtain the PID of the bash script you can use variable <code>$$</code>.</p> <p>Then, to obtain its children, you can run:</p> <pre><code>bash_pid=$$ children=`ps -eo ppid | grep -w $bash_pid` </code></pre> <p><code>ps</code> will return the list of parent PIDs. Then <code>grep</code> filters all the processes ... | 387, 3300, 5910 | bash, pid, process | <h1>Finding number of child processes</h1>
<p>How do find the number of child processes of a bash script, from within the script itself?</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,095 | bash | # Finding number of child processes
How do find the number of child processes of a bash script, from within the script itself? | To obtain the PID of the bash script you can use variable `$$`.
Then, to obtain its children, you can run:
```
bash_pid=$$
children=`ps -eo ppid | grep -w $bash_pid`
```
`ps` will return the list of parent PIDs. Then `grep` filters all the processes not related to the bash script's children. In order to get the numb... |
9050331 | What does it mean in linux scripts? #!/usr/bin/python -tt | 19 | 2012-01-29 02:08:23 | <p>I know that in the begining of .sh bash scripts is</p>
<pre><code>#!/bin/bash
</code></pre>
<p>which points to the command interpeter executable.</p>
<p>But during watching Google Python Class <a href="http://www.youtube.com/watch?v=tKTZoB2Vjuk" rel="noreferrer">http://www.youtube.com/watch?v=tKTZoB2Vjuk</a> I no... | 17,668 | 965,187 | 2012-01-29 02:33:14 | 9,050,352 | 15 | 2012-01-29 02:13:49 | 118,068 | 2012-01-29 02:19:51 | https://stackoverflow.com/q/9050331 | https://stackoverflow.com/a/9050352 | <p>Question #1) The line is called a shebang, and there's no right form that works universally. e.g.</p>
<pre><code>#!python
#!/usr/bin/python
#!/usr/local/bin/python
#!/usr/bin/python -t
</code></pre>
<p>are all valid/acceptable forms, but may not work on all systems:</p>
<p><code>#!python</code> will work only if ... | <p>Question #1) The line is called a shebang, and there's no right form that works universally. e.g.</p> <pre><code>#!python #!/usr/bin/python #!/usr/local/bin/python #!/usr/bin/python -t </code></pre> <p>are all valid/acceptable forms, but may not work on all systems:</p> <p><code>#!python</code> will work only if ... | 16, 58, 387, 1687 | bash, interpreter, linux, python | <h1>What does it mean in linux scripts? #!/usr/bin/python -tt</h1>
<p>I know that in the begining of .sh bash scripts is</p>
<pre><code>#!/bin/bash
</code></pre>
<p>which points to the command interpeter executable.</p>
<p>But during watching Google Python Class <a href="http://www.youtube.com/watch?v=tKTZoB2Vjuk" r... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,096 | bash | # What does it mean in linux scripts? #!/usr/bin/python -tt
I know that in the begining of .sh bash scripts is
```
#!/bin/bash
```
which points to the command interpeter executable.
But during watching Google Python Class <http://www.youtube.com/watch?v=tKTZoB2Vjuk> I noticed that for python they use
```
#!/usr/bi... | Question #1) The line is called a shebang, and there's no right form that works universally. e.g.
```
#!python
#!/usr/bin/python
#!/usr/local/bin/python
#!/usr/bin/python -t
```
are all valid/acceptable forms, but may not work on all systems:
`#!python` will work only if the python executable is somewhere in your sh... |
6115225 | Escaping Shell Commands In java? | 19 | 2011-05-24 18:40:57 | <p>I have a webservice that will take some input from authenticated machines as XML (this is for a network management system that I am integrating with some other software) and execute a shell script with some of the XML data as arguments.</p>
<p>In Java(/Linux), what is the best way to escape shell commands to ensure... | 9,279 | 416,665 | 2017-10-12 14:36:58 | 6,116,076 | 15 | 2011-05-24 19:54:36 | null | 2011-05-24 20:04:05 | https://stackoverflow.com/q/6115225 | https://stackoverflow.com/a/6116076 | <p>I would suggest <strong>using ProcessBuilder or one of the Runtime.exec methods <em>which does not</em> run through the shell</strong> and thus <em>does not require shell escaping</em> to avoid injection attacks (here).</p>
<ul>
<li><p><a href="http://download.oracle.com/javase/6/docs/api/java/lang/ProcessBuilder.h... | <p>I would suggest <strong>using ProcessBuilder or one of the Runtime.exec methods <em>which does not</em> run through the shell</strong> and thus <em>does not require shell escaping</em> to avoid injection attacks (here).</p> <ul> <li><p><a href="http://download.oracle.com/javase/6/docs/api/java/lang/ProcessBuilder.h... | 17, 390, 4804 | escaping, java, shell | <h1>Escaping Shell Commands In java?</h1>
<p>I have a webservice that will take some input from authenticated machines as XML (this is for a network management system that I am integrating with some other software) and execute a shell script with some of the XML data as arguments.</p>
<p>In Java(/Linux), what is the b... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,097 | bash | # Escaping Shell Commands In java?
I have a webservice that will take some input from authenticated machines as XML (this is for a network management system that I am integrating with some other software) and execute a shell script with some of the XML data as arguments.
In Java(/Linux), what is the best way to escap... | I would suggest **using ProcessBuilder or one of the Runtime.exec methods *which does not* run through the shell** and thus *does not require shell escaping* to avoid injection attacks (here).
- [ProcessBuilder](http://download.oracle.com/javase/6/docs/api/java/lang/ProcessBuilder.html) -- more flexible than `Runtime.... |
4581203 | Shell command to find files in a directory pattern | 19 | 2011-01-02 23:58:36 | <p>With a shell command i need to list all files on my server in the following directory pattern:</p>
<blockquote>
<p>/home/*/public_html/images/*.php</p>
</blockquote>
<p>Theres a few an its taking a long time to do this manually. I really have no idea when it comes to these commands.</p>
| 52,940 | 560,702 | 2014-02-05 04:00:53 | 4,581,234 | 15 | 2011-01-03 00:10:05 | 552,792 | 2011-01-03 00:10:05 | https://stackoverflow.com/q/4581203 | https://stackoverflow.com/a/4581234 | <p>Shell Script:</p>
<pre><code>find /home/*/public_html/images -iname "*php" -exec echo {} \;
</code></pre>
<p>You can then change the -exec command to do whatever actions you want to the returned files. In this case, we echo them, but you could easily perform other actions as well.</p>
| <p>Shell Script:</p> <pre><code>find /home/*/public_html/images -iname "*php" -exec echo {} \; </code></pre> <p>You can then change the -exec command to do whatever actions you want to the returned files. In this case, we echo them, but you could easily perform other actions as well.</p> | 58, 387, 390, 488 | bash, console, linux, shell | <h1>Shell command to find files in a directory pattern</h1>
<p>With a shell command i need to list all files on my server in the following directory pattern:</p>
<blockquote>
<p>/home/*/public_html/images/*.php</p>
</blockquote>
<p>Theres a few an its taking a long time to do this manually. I really have no idea wh... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,098 | bash | # Shell command to find files in a directory pattern
With a shell command i need to list all files on my server in the following directory pattern:
> /home/*/public_html/images/*.php
Theres a few an its taking a long time to do this manually. I really have no idea when it comes to these commands. | Shell Script:
```
find /home/*/public_html/images -iname "*php" -exec echo {} \;
```
You can then change the -exec command to do whatever actions you want to the returned files. In this case, we echo them, but you could easily perform other actions as well. |
2224321 | Problems installing Java EE SDK on Linux | 19 | 2010-02-08 19:38:23 | <p>I installed the Java 6 JRE on my VPS just fine, but I can't get the EE SDK installation to even run.</p>
<pre><code>root@vps [/usr/java]# java -version
java version "1.6.0_18"
Java(TM) SE Runtime Environment (build 1.6.0_18-b07)
Java HotSpot(TM) Client VM (build 16.0-b13, mixed mode)
</code></pre>
<p>However, when... | 41,948 | 243,613 | 2014-07-28 10:35:37 | 2,224,461 | 15 | 2010-02-08 19:58:31 | 4,249 | 2010-02-08 19:58:31 | https://stackoverflow.com/q/2224321 | https://stackoverflow.com/a/2224461 | <p>Do you have a JDK installed? You likely want to put <code>$JDK_HOME/bin</code> on your PATH, not the <code>/bin</code> of a JRE, as <code>jar</code> comes with JDK, not JRE.</p>
| <p>Do you have a JDK installed? You likely want to put <code>$JDK_HOME/bin</code> on your PATH, not the <code>/bin</code> of a JRE, as <code>jar</code> comes with JDK, not JRE.</p> | 17, 58, 529, 10327 | installation, java, linux, sh | <h1>Problems installing Java EE SDK on Linux</h1>
<p>I installed the Java 6 JRE on my VPS just fine, but I can't get the EE SDK installation to even run.</p>
<pre><code>root@vps [/usr/java]# java -version
java version "1.6.0_18"
Java(TM) SE Runtime Environment (build 1.6.0_18-b07)
Java HotSpot(TM) Client VM (build 16.... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,099 | bash | # Problems installing Java EE SDK on Linux
I installed the Java 6 JRE on my VPS just fine, but I can't get the EE SDK installation to even run.
```
root@vps [/usr/java]# java -version
java version "1.6.0_18"
Java(TM) SE Runtime Environment (build 1.6.0_18-b07)
Java HotSpot(TM) Client VM (build 16.0-b13, mixed mode)
`... | Do you have a JDK installed? You likely want to put `$JDK_HOME/bin` on your PATH, not the `/bin` of a JRE, as `jar` comes with JDK, not JRE. |
1803701 | cygwin file path tab completion not working | 19 | 2009-11-26 13:35:11 | <p>How can I set up Cygwin to have tab completion?</p>
<p>Actually, I do have it automatically, but it does not seem to complete paths. How do I set it up to complete paths?</p>
| 19,978 | 216,275 | 2021-07-12 14:36:48 | 1,803,891 | 15 | 2009-11-26 14:13:17 | 33,837 | 2009-12-28 17:06:17 | https://stackoverflow.com/q/1803701 | https://stackoverflow.com/a/1803891 | <p>Cygwin paths typically start with <code>/cygdrive/c</code> (substitute whatever drive letter you happen to be using, of course). So to complete <code>c:\Program Files</code>, you must type (for instance) <kbd>/cygdrive/c/Prog</kbd> and then press <kbd>TAB</kbd>.</p>
<p>Also, note that Cygwin is case-sensitive, so ... | <p>Cygwin paths typically start with <code>/cygdrive/c</code> (substitute whatever drive letter you happen to be using, of course). So to complete <code>c:\Program Files</code>, you must type (for instance) <kbd>/cygdrive/c/Prog</kbd> and then press <kbd>TAB</kbd>.</p> <p>Also, note that Cygwin is case-sensitive, so ... | 387, 1731 | bash, cygwin | <h1>cygwin file path tab completion not working</h1>
<p>How can I set up Cygwin to have tab completion?</p>
<p>Actually, I do have it automatically, but it does not seem to complete paths. How do I set it up to complete paths?</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,100 | bash | # cygwin file path tab completion not working
How can I set up Cygwin to have tab completion?
Actually, I do have it automatically, but it does not seem to complete paths. How do I set it up to complete paths? | Cygwin paths typically start with `/cygdrive/c` (substitute whatever drive letter you happen to be using, of course). So to complete `c:\Program Files`, you must type (for instance) `/cygdrive/c/Prog` and then press `TAB`.
Also, note that Cygwin is case-sensitive, so `/cygdrive/c/prog` would not complete to `c:\Progra... |
31814663 | Git remote two branches same name different case | 18 | 2015-08-04 16:33:27 | <pre><code>origin/joetest
origin/JoeTest
</code></pre>
<p>I have a problem I have two remote branches in git which are the same name with different case.</p>
<p>I can't work out what todo in visual studio online I can see the differences but it can't merge them because of conflicts.</p>
<p>The git tools in visual st... | 12,506 | 3,173,834 | 2024-01-07 22:07:01 | 31,814,760 | 15 | 2015-08-04 16:38:40 | 216,074 | 2015-08-04 16:38:40 | https://stackoverflow.com/q/31814663 | https://stackoverflow.com/a/31814760 | <p>Clone the repository on an operating system with a case-sensitive file system, e.g. Linux, then rename one of the branches, push it, and delete the old branch:</p>
<pre><code>git clone <url> repo
cd repo
git checkout -b joetest2 origin/JoeTest
git push origin joetest2:joetest2
git push origin :JoeTest
</code>... | <p>Clone the repository on an operating system with a case-sensitive file system, e.g. Linux, then rename one of the branches, push it, and delete the old branch:</p> <pre><code>git clone <url> repo cd repo git checkout -b joetest2 origin/JoeTest git push origin joetest2:joetest2 git push origin :JoeTest </code>... | 119, 387 | bash, git | <h1>Git remote two branches same name different case</h1>
<pre><code>origin/joetest
origin/JoeTest
</code></pre>
<p>I have a problem I have two remote branches in git which are the same name with different case.</p>
<p>I can't work out what todo in visual studio online I can see the differences but it can't merge the... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,101 | bash | # Git remote two branches same name different case
```
origin/joetest
origin/JoeTest
```
I have a problem I have two remote branches in git which are the same name with different case.
I can't work out what todo in visual studio online I can see the differences but it can't merge them because of conflicts.
The git ... | Clone the repository on an operating system with a case-sensitive file system, e.g. Linux, then rename one of the branches, push it, and delete the old branch:
```
git clone <url> repo
cd repo
git checkout -b joetest2 origin/JoeTest
git push origin joetest2:joetest2
git push origin :JoeTest
```
As for why Git is havi... |
19007884 | Import XML files to PostgreSQL | 18 | 2013-09-25 14:36:51 | <p>I do have a lot of XML files I would like to import in the table <code>xml_data</code>:</p>
<pre><code>create table xml_data(result xml);
</code></pre>
<p>To do this I have a simple bash script with loop:</p>
<pre><code>#!/bin/sh
FILES=/folder/with/xml/files/*.xml
for f in $FILES
do
psql psql -d mydb -h myhost ... | 65,767 | 1,442,374 | 2019-11-28 10:58:46 | 19,013,822 | 15 | 2013-09-25 19:42:18 | 939,860 | 2019-04-26 22:00:36 | https://stackoverflow.com/q/19007884 | https://stackoverflow.com/a/19013822 |
<p>I would try a different approach: read the XML file directly into variable inside a plpgsql function and proceed from there. Should be <strong>a lot faster</strong> and a lot more robust.</p>
<pre class="lang-sql prettyprint-override"><code>CREATE OR REPLACE FUNCTION f_sync_from_xml()
RETURNS boolean AS
$BODY$
... | <p>I would try a different approach: read the XML file directly into variable inside a plpgsql function and proceed from there. Should be <strong>a lot faster</strong> and a lot more robust.</p> <pre class="lang-sql prettyprint-override"><code>CREATE OR REPLACE FUNCTION f_sync_from_xml() RETURNS boolean AS $BODY$ ... | 19, 256, 387 | bash, postgresql, xml | <h1>Import XML files to PostgreSQL</h1>
<p>I do have a lot of XML files I would like to import in the table <code>xml_data</code>:</p>
<pre><code>create table xml_data(result xml);
</code></pre>
<p>To do this I have a simple bash script with loop:</p>
<pre><code>#!/bin/sh
FILES=/folder/with/xml/files/*.xml
for f in ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,102 | bash | # Import XML files to PostgreSQL
I do have a lot of XML files I would like to import in the table `xml_data`:
```
create table xml_data(result xml);
```
To do this I have a simple bash script with loop:
```
#!/bin/sh
FILES=/folder/with/xml/files/*.xml
for f in $FILES
do
psql psql -d mydb -h myhost -U usr -c \'\co... | I would try a different approach: read the XML file directly into variable inside a plpgsql function and proceed from there. Should be **a lot faster** and a lot more robust.
```
CREATE OR REPLACE FUNCTION f_sync_from_xml()
RETURNS boolean AS
$BODY$
DECLARE
myxml xml;
datafile text := 'path/to/my_file.xml... |
17189010 | How to copy/cut a file (not the contents) to the clipboard in Windows on the command line? | 18 | 2013-06-19 10:34:30 | <p>Is there a way to copy (or cut) a file to the Windows clipboard from the command line?</p>
<p>In particular with a batch script. I know how to copy the contents to the clipboard (<code>type file | clip</code>), but this is not the case. I want to have the whole file as I would press <kbd>Ctrl</kbd> + <kbd>C</kbd> i... | 15,419 | 2,451,546 | 2021-08-29 15:18:41 | 17,354,470 | 15 | 2013-06-27 22:44:49 | 2,451,546 | 2017-04-24 15:18:56 | https://stackoverflow.com/q/17189010 | https://stackoverflow.com/a/17354470 | <p>OK, it seems the easiest way was to create a small C# tool that takes arguments and stores them in the clipboard:</p>
<pre><code>using System;
using System.Windows.Forms;
using System.Collections.Generic;
using System.Collections.Specialized;
namespace File2Clip
{
public class App
{
[STAThread]
... | <p>OK, it seems the easiest way was to create a small C# tool that takes arguments and stores them in the clipboard:</p> <pre><code>using System; using System.Windows.Forms; using System.Collections.Generic; using System.Collections.Specialized; namespace File2Clip { public class App { [STAThread] ... | 64, 390, 524, 1231, 7002 | batch-file, clipboard, command-line, shell, windows | <h1>How to copy/cut a file (not the contents) to the clipboard in Windows on the command line?</h1>
<p>Is there a way to copy (or cut) a file to the Windows clipboard from the command line?</p>
<p>In particular with a batch script. I know how to copy the contents to the clipboard (<code>type file | clip</code>), but t... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,103 | bash | # How to copy/cut a file (not the contents) to the clipboard in Windows on the command line?
Is there a way to copy (or cut) a file to the Windows clipboard from the command line?
In particular with a batch script. I know how to copy the contents to the clipboard (`type file | clip`), but this is not the case. I want... | OK, it seems the easiest way was to create a small C# tool that takes arguments and stores them in the clipboard:
```
using System;
using System.Windows.Forms;
using System.Collections.Generic;
using System.Collections.Specialized;
namespace File2Clip
{
public class App
{
[STAThread]
static vo... |
17114807 | sed replace last line matching pattern | 18 | 2013-06-14 18:14:10 | <p>Given a file like this:</p>
<pre><code>a
b
a
b
</code></pre>
<p>I'd like to be able to use <code>sed</code> to replace just the last line that contains an instance of "a" in the file. So if I wanted to replace it with "c", then the output should look like: </p>
<pre><code>a
b
c
b
</code></pre>
<p>Note that I n... | 22,138 | 1,789,543 | 2024-07-20 20:10:16 | 17,115,550 | 15 | 2013-06-14 19:02:55 | 7,552 | 2017-01-25 05:00:51 | https://stackoverflow.com/q/17114807 | https://stackoverflow.com/a/17115550 | <p>Not quite sed only:</p>
<pre><code>tac file | sed '/a/ {s//c/; :loop; n; b loop}' | tac
</code></pre>
<p>testing</p>
<pre><code>% printf "%s\n" a b a b a b | tac | sed '/a/ {s//c/; :loop; n; b loop}' | tac
a
b
a
b
c
b
</code></pre>
<p>Reverse the file, then for the <strong>first</strong> match, make the substitu... | <p>Not quite sed only:</p> <pre><code>tac file | sed '/a/ {s//c/; :loop; n; b loop}' | tac </code></pre> <p>testing</p> <pre><code>% printf "%s\n" a b a b a b | tac | sed '/a/ {s//c/; :loop; n; b loop}' | tac a b a b c b </code></pre> <p>Reverse the file, then for the <strong>first</strong> match, make the substitu... | 18, 387, 5282 | bash, regex, sed | <h1>sed replace last line matching pattern</h1>
<p>Given a file like this:</p>
<pre><code>a
b
a
b
</code></pre>
<p>I'd like to be able to use <code>sed</code> to replace just the last line that contains an instance of "a" in the file. So if I wanted to replace it with "c", then the output should look like: </p>
<p... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,104 | bash | # sed replace last line matching pattern
Given a file like this:
```
a
b
a
b
```
I'd like to be able to use `sed` to replace just the last line that contains an instance of "a" in the file. So if I wanted to replace it with "c", then the output should look like:
```
a
b
c
b
```
Note that I need this to work irresp... | Not quite sed only:
```
tac file | sed '/a/ {s//c/; :loop; n; b loop}' | tac
```
testing
```
% printf "%s\n" a b a b a b | tac | sed '/a/ {s//c/; :loop; n; b loop}' | tac
a
b
a
b
c
b
```
Reverse the file, then for the **first** match, make the substitution and then unconditionally slurp up the rest of the file. The... |
14513571 | How to enable default file completion in bash | 18 | 2013-01-25 00:49:18 | <p>Say I have a command named "foo" that takes one argument (either "encrypt" or "decrypt") and then a list of files. I want to write a bash completion script that helps with the first argument and then enables standard file completion for the others. The closest I've been able to come is this:</p>
<pre><code>comple... | 5,743 | 1,988,504 | 2019-03-13 21:28:10 | 14,524,311 | 15 | 2013-01-25 14:55:07 | 1,955,371 | 2019-03-13 21:28:10 | https://stackoverflow.com/q/14513571 | https://stackoverflow.com/a/14524311 | <p>The bash documentation can be a little enigmatic. The simplest solution is to alter the completion function binding:</p>
<pre><code>complete -o filenames -F _foo foo
</code></pre>
<p>This means the function returns filenames (including directories), and special handling of the results is enabled.</p>
<p>(IMHO the... | <p>The bash documentation can be a little enigmatic. The simplest solution is to alter the completion function binding:</p> <pre><code>complete -o filenames -F _foo foo </code></pre> <p>This means the function returns filenames (including directories), and special handling of the results is enabled.</p> <p>(IMHO the... | 387 | bash | <h1>How to enable default file completion in bash</h1>
<p>Say I have a command named "foo" that takes one argument (either "encrypt" or "decrypt") and then a list of files. I want to write a bash completion script that helps with the first argument and then enables standard file completion for the others. The closest... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,105 | bash | # How to enable default file completion in bash
Say I have a command named "foo" that takes one argument (either "encrypt" or "decrypt") and then a list of files. I want to write a bash completion script that helps with the first argument and then enables standard file completion for the others. The closest I've been ... | The bash documentation can be a little enigmatic. The simplest solution is to alter the completion function binding:
```
complete -o filenames -F _foo foo
```
This means the function returns filenames (including directories), and special handling of the results is enabled.
(IMHO the documentation doesn't make it cle... |
7935512 | Why doesn't "sort file1 > file1" work? | 18 | 2011-10-28 22:26:41 | <p>When I am trying to sort a file and save the sorted output in itself, like this</p>
<pre><code>sort file1 > file1;
</code></pre>
<p>the contents of the file1 is getting erased altogether, whereas when i am trying to do the same with 'tee' command like this</p>
<pre><code>sort file1 | tee file1;
</code></pre>
... | 8,887 | 540,665 | 2017-08-16 23:39:27 | 7,935,539 | 15 | 2011-10-28 22:30:06 | null | 2011-10-28 22:30:06 | https://stackoverflow.com/q/7935512 | https://stackoverflow.com/a/7935539 | <p>It doesn't work because '>' redirection implies truncation, and to avoid keeping the whole output of <code>sort</code> in the memory before re-directing to the file, bash truncates and redirects output before running <code>sort</code>. Thus, contents of the <code>file1</code> file will be truncated before <code>sort... | <p>It doesn't work because '>' redirection implies truncation, and to avoid keeping the whole output of <code>sort</code> in the memory before re-directing to the file, bash truncates and redirects output before running <code>sort</code>. Thus, contents of the <code>file1</code> file will be truncated before <code>sort... | 34, 58, 390, 5813, 31901 | http-redirect, linux, pipe, shell, unix | <h1>Why doesn't "sort file1 > file1" work?</h1>
<p>When I am trying to sort a file and save the sorted output in itself, like this</p>
<pre><code>sort file1 > file1;
</code></pre>
<p>the contents of the file1 is getting erased altogether, whereas when i am trying to do the same with 'tee' command like this</p>
<p... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,106 | bash | # Why doesn't "sort file1 > file1" work?
When I am trying to sort a file and save the sorted output in itself, like this
```
sort file1 > file1;
```
the contents of the file1 is getting erased altogether, whereas when i am trying to do the same with 'tee' command like this
```
sort file1 | tee file1;
```
it works ... | It doesn't work because '>' redirection implies truncation, and to avoid keeping the whole output of `sort` in the memory before re-directing to the file, bash truncates and redirects output before running `sort`. Thus, contents of the `file1` file will be truncated before `sort` will have a chance to read it. |
7652911 | equivalent of su in powershell | 18 | 2011-10-04 19:13:19 | <p>Let's say I'm an administrator on a Windows7 box. I'd like to be able to run commands as other users without knowing their passwords.
This is what happens on linux. If I'm root, I can 'su' to other accounts without providing any password and run commands in their own name.</p>
| 38,713 | 140,732 | 2018-01-25 00:14:03 | 7,656,592 | 15 | 2011-10-05 04:02:27 | 608,772 | 2011-10-05 04:02:27 | https://stackoverflow.com/q/7652911 | https://stackoverflow.com/a/7656592 | <p><strong>su</strong> (substitute user or switch user) allows changing the account associated with the current terminal. Where <em>Normal user</em> have to give password of the account he wants to change to, super user (root) can change to any ID he wants without giving password.</p>
<p><strong>sudo</strong> executes... | <p><strong>su</strong> (substitute user or switch user) allows changing the account associated with the current terminal. Where <em>Normal user</em> have to give password of the account he wants to change to, super user (root) can change to any ID he wants without giving password.</p> <p><strong>sudo</strong> executes... | 526 | powershell | <h1>equivalent of su in powershell</h1>
<p>Let's say I'm an administrator on a Windows7 box. I'd like to be able to run commands as other users without knowing their passwords.
This is what happens on linux. If I'm root, I can 'su' to other accounts without providing any password and run commands in their own name.</p>... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,107 | bash | # equivalent of su in powershell
Let's say I'm an administrator on a Windows7 box. I'd like to be able to run commands as other users without knowing their passwords.
This is what happens on linux. If I'm root, I can 'su' to other accounts without providing any password and run commands in their own name. | **su** (substitute user or switch user) allows changing the account associated with the current terminal. Where *Normal user* have to give password of the account he wants to change to, super user (root) can change to any ID he wants without giving password.
**sudo** executes a command as another user but observes a s... |
3605146 | Creating & Editing performance counters in a powershell script or command line | 18 | 2010-08-31 00:10:38 | <p>I'm trying to move the verification & creation of my performance counter groups, and the counters themselves, out of my web service and into a powershell script that's run during deployment.</p>
<p>Can this be done? Or am I stuck using a simple app to build the groups & counters?</p>
<p>Thanks much :)</p>
| 7,401 | 226,500 | 2017-11-20 20:50:20 | 4,394,377 | 15 | 2010-12-09 02:43:59 | 226,500 | 2010-12-09 02:43:59 | https://stackoverflow.com/q/3605146 | https://stackoverflow.com/a/4394377 | <p>Figured this out a while ago, but never posted.<br>
Here's my solution: </p>
<pre><code>//save out the type name for sanity's sake
$ccdTypeName = 'System.Diagnostics.CounterCreationData'
$CounterCollection = New-Object System.Diagnostics.CounterCreationDataCollection
//create as many counters as we'd like, and ad... | <p>Figured this out a while ago, but never posted.<br> Here's my solution: </p> <pre><code>//save out the type name for sanity's sake $ccdTypeName = 'System.Diagnostics.CounterCreationData' $CounterCollection = New-Object System.Diagnostics.CounterCreationDataCollection //create as many counters as we'd like, and ad... | 526, 598, 2631, 7466 | cmd, performance, performancecounter, powershell | <h1>Creating & Editing performance counters in a powershell script or command line</h1>
<p>I'm trying to move the verification & creation of my performance counter groups, and the counters themselves, out of my web service and into a powershell script that's run during deployment.</p>
<p>Can this be done? Or am I ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,108 | bash | # Creating & Editing performance counters in a powershell script or command line
I'm trying to move the verification & creation of my performance counter groups, and the counters themselves, out of my web service and into a powershell script that's run during deployment.
Can this be done? Or am I stuck using a simple... | Figured this out a while ago, but never posted.
Here's my solution:
```
//save out the type name for sanity's sake
$ccdTypeName = 'System.Diagnostics.CounterCreationData'
$CounterCollection = New-Object System.Diagnostics.CounterCreationDataCollection
//create as many counters as we'd like, and add them to the coll... |
1644856 | Terminate running commands when shell script is killed | 18 | 2009-10-29 16:15:10 | <p>For testing purposes I have this shell script</p>
<pre><code>#!/bin/bash
echo $$
find / >/dev/null 2>&1
</code></pre>
<p>Running this from an interactive terminal, ctrl+c will terminate bash, and the find command.</p>
<pre><code>$ ./test-k.sh
13227
<Ctrl+C>
$ ps -ef |grep find
$
</code></pre>
<p>... | 18,847 | 126,769 | 2015-11-05 16:40:13 | 1,645,157 | 15 | 2009-10-29 17:00:26 | 116,908 | 2009-10-29 17:31:36 | https://stackoverflow.com/q/1644856 | https://stackoverflow.com/a/1645157 | <p>I would do something like this:</p>
<pre><code>#!/bin/bash
trap : SIGTERM SIGINT
echo $$
find / >/dev/null 2>&1 &
FIND_PID=$!
wait $FIND_PID
if [[ $? -gt 128 ]]
then
kill $FIND_PID
fi
</code></pre>
<p>Some explanation is in order, I guess. Out the gate, we need to change some of the default ... | <p>I would do something like this:</p> <pre><code>#!/bin/bash trap : SIGTERM SIGINT echo $$ find / >/dev/null 2>&1 & FIND_PID=$! wait $FIND_PID if [[ $? -gt 128 ]] then kill $FIND_PID fi </code></pre> <p>Some explanation is in order, I guess. Out the gate, we need to change some of the default ... | 387 | bash | <h1>Terminate running commands when shell script is killed</h1>
<p>For testing purposes I have this shell script</p>
<pre><code>#!/bin/bash
echo $$
find / >/dev/null 2>&1
</code></pre>
<p>Running this from an interactive terminal, ctrl+c will terminate bash, and the find command.</p>
<pre><code>$ ./test-k.... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,109 | bash | # Terminate running commands when shell script is killed
For testing purposes I have this shell script
```
#!/bin/bash
echo $$
find / >/dev/null 2>&1
```
Running this from an interactive terminal, ctrl+c will terminate bash, and the find command.
```
$ ./test-k.sh
13227
<Ctrl+C>
$ ps -ef |grep find
$
```
Running i... | I would do something like this:
```
#!/bin/bash
trap : SIGTERM SIGINT
echo $$
find / >/dev/null 2>&1 &
FIND_PID=$!
wait $FIND_PID
if [[ $? -gt 128 ]]
then
kill $FIND_PID
fi
```
Some explanation is in order, I guess. Out the gate, we need to change some of the default signal handling. `:` is a no-op command, s... |
1010924 | Is there a shorter way to pull groups out of a Powershell regex? | 18 | 2009-06-18 05:37:01 | <p>In PowerShell I find myself doing this kind of thing over and over again for matches:</p>
<pre><code>some-command | select-string '^(//[^#]*)' |
%{some-other-command $_.matches[0].groups[1].value}
</code></pre>
<p>So basically - run a command that generates lines of text, and for each line I want to run a com... | 14,071 | 14,582 | 2012-03-07 19:22:25 | 1,011,163 | 15 | 2009-06-18 06:58:56 | 74,198 | 2009-06-19 13:13:55 | https://stackoverflow.com/q/1010924 | https://stackoverflow.com/a/1011163 | <p>You can use the <code>-match</code> operator to reformulate your command as:</p>
<pre><code>some-command | Foreach-Object { if($_ -match '^(//[^#]*)') { some-other-command $($matches[1])}}
</code></pre>
| <p>You can use the <code>-match</code> operator to reformulate your command as:</p> <pre><code>some-command | Foreach-Object { if($_ -match '^(//[^#]*)') { some-other-command $($matches[1])}} </code></pre> | 18, 526 | powershell, regex | <h1>Is there a shorter way to pull groups out of a Powershell regex?</h1>
<p>In PowerShell I find myself doing this kind of thing over and over again for matches:</p>
<pre><code>some-command | select-string '^(//[^#]*)' |
%{some-other-command $_.matches[0].groups[1].value}
</code></pre>
<p>So basically - run a c... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,110 | bash | # Is there a shorter way to pull groups out of a Powershell regex?
In PowerShell I find myself doing this kind of thing over and over again for matches:
```
some-command | select-string '^(//[^#]*)' |
%{some-other-command $_.matches[0].groups[1].value}
```
So basically - run a command that generates lines of te... | You can use the `-match` operator to reformulate your command as:
```
some-command | Foreach-Object { if($_ -match '^(//[^#]*)') { some-other-command $($matches[1])}}
``` |
65004930 | Win 10 WSL won't set default 2 | 17 | 2020-11-25 12:41:32 | <p>Completely new to developing on windows (as my mac is in for repair) and I'm trying to follow these instructions <a href="https://learn.microsoft.com/en-us/windows/wsl/install-win10" rel="noreferrer">https://learn.microsoft.com/en-us/windows/wsl/install-win10</a></p>
<p>But while I seem to have an adequate version, ... | 62,241 | 1,923,190 | 2023-03-18 21:33:47 | 65,005,633 | 15 | 2020-11-25 13:27:23 | 13,510,728 | 2020-11-25 13:27:23 | https://stackoverflow.com/q/65004930 | https://stackoverflow.com/a/65005633 | <p>Make sure virtualisation is enabled in your BIOS by going to Task Manager -> More Details -> Performace -> CPU and an option called Virtualisation should be set to enabled. If it isn't enabled then go to your BIOS and enable <strong>SVM Mode</strong> on AMD CPUs or <strong>Intel Virtualisation Technology</s... | <p>Make sure virtualisation is enabled in your BIOS by going to Task Manager -> More Details -> Performace -> CPU and an option called Virtualisation should be set to enabled. If it isn't enabled then go to your BIOS and enable <strong>SVM Mode</strong> on AMD CPUs or <strong>Intel Virtualisation Technology</s... | 64, 526 | powershell, windows | <h1>Win 10 WSL won't set default 2</h1>
<p>Completely new to developing on windows (as my mac is in for repair) and I'm trying to follow these instructions <a href="https://learn.microsoft.com/en-us/windows/wsl/install-win10" rel="noreferrer">https://learn.microsoft.com/en-us/windows/wsl/install-win10</a></p>
<p>But wh... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,111 | bash | # Win 10 WSL won't set default 2
Completely new to developing on windows (as my mac is in for repair) and I'm trying to follow these instructions <https://learn.microsoft.com/en-us/windows/wsl/install-win10>
But while I seem to have an adequate version, my wsl does not seem to have the right option. I have installed ... | Make sure virtualisation is enabled in your BIOS by going to Task Manager -> More Details -> Performace -> CPU and an option called Virtualisation should be set to enabled. If it isn't enabled then go to your BIOS and enable **SVM Mode** on AMD CPUs or **Intel Virtualisation Technology** on Intel CPUs.
next, make sure... |
29699026 | PowerShell copy an array completely | 17 | 2015-04-17 12:18:46 | <p>I'm trying to create a complete copy of an existing array. Every time I try this it doesn't seem to work. The thing is that I'm modifying the object names inside the new copied array, but they're also changed in the original array..</p>
<h4>Simplified example</h4>
<pre><code>Function Get-Fruits {
Param (
... | 28,055 | 2,304,170 | 2025-01-13 08:25:04 | 29,699,129 | 15 | 2015-04-17 12:24:03 | 4,640,209 | 2015-04-17 12:24:03 | https://stackoverflow.com/q/29699026 | https://stackoverflow.com/a/29699129 | <p>You can use serialisation to deep clone your array:</p>
<pre><code>#Original data
$FruitsOriginal = Get-Fruits
# Serialize and Deserialize data using BinaryFormatter
$ms = New-Object System.IO.MemoryStream
$bf = New-Object System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
$bf.Serialize($ms, $FruitsOri... | <p>You can use serialisation to deep clone your array:</p> <pre><code>#Original data $FruitsOriginal = Get-Fruits # Serialize and Deserialize data using BinaryFormatter $ms = New-Object System.IO.MemoryStream $bf = New-Object System.Runtime.Serialization.Formatters.Binary.BinaryFormatter $bf.Serialize($ms, $FruitsOri... | 114, 526 | arrays, powershell | <h1>PowerShell copy an array completely</h1>
<p>I'm trying to create a complete copy of an existing array. Every time I try this it doesn't seem to work. The thing is that I'm modifying the object names inside the new copied array, but they're also changed in the original array..</p>
<h4>Simplified example</h4>
<pre><c... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,112 | bash | # PowerShell copy an array completely
I'm trying to create a complete copy of an existing array. Every time I try this it doesn't seem to work. The thing is that I'm modifying the object names inside the new copied array, but they're also changed in the original array..
#### Simplified example
```
Function Get-Fruit... | You can use serialisation to deep clone your array:
```
#Original data
$FruitsOriginal = Get-Fruits
# Serialize and Deserialize data using BinaryFormatter
$ms = New-Object System.IO.MemoryStream
$bf = New-Object System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
$bf.Serialize($ms, $FruitsOriginal)
$ms.Pos... |
28110536 | How to split an mbox file into n-MB big chunks using the terminal? | 17 | 2015-01-23 13:00:58 | <p>So I've <a href="https://stackoverflow.com/questions/11281893/how-to-split-mailbox-into-single-file-per-message">read through this question</a> on SO but it does not quite help me any. I want to import a Gmail generated mbox file into another webmail service, but the problem is it only allows 40 MB huge files per im... | 13,515 | 1,449,710 | 2024-08-16 22:28:06 | 28,111,716 | 15 | 2015-01-23 14:07:41 | 2,836,621 | 2015-01-23 16:58:47 | https://stackoverflow.com/q/28110536 | https://stackoverflow.com/a/28111716 | <p>If your <code>mbox</code> is in standard format, each message will begin with <code>From</code> and a space:</p>
<pre><code>From someone@somewhere.com
</code></pre>
<p>So, you could <code>COPY YOUR MBOX TO A TEMPORARY DIRECTORY</code> and try using <code>awk</code> to process it, on a message-by-message basis, onl... | <p>If your <code>mbox</code> is in standard format, each message will begin with <code>From</code> and a space:</p> <pre><code>From someone@somewhere.com </code></pre> <p>So, you could <code>COPY YOUR MBOX TO A TEMPORARY DIRECTORY</code> and try using <code>awk</code> to process it, on a message-by-message basis, onl... | 387, 391, 19228 | bash, mbox, terminal | <h1>How to split an mbox file into n-MB big chunks using the terminal?</h1>
<p>So I've <a href="https://stackoverflow.com/questions/11281893/how-to-split-mailbox-into-single-file-per-message">read through this question</a> on SO but it does not quite help me any. I want to import a Gmail generated mbox file into anothe... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,113 | bash | # How to split an mbox file into n-MB big chunks using the terminal?
So I've [read through this question](https://stackoverflow.com/questions/11281893/how-to-split-mailbox-into-single-file-per-message) on SO but it does not quite help me any. I want to import a Gmail generated mbox file into another webmail service, b... | If your `mbox` is in standard format, each message will begin with `From` and a space:
```
From someone@somewhere.com
```
So, you could `COPY YOUR MBOX TO A TEMPORARY DIRECTORY` and try using `awk` to process it, on a message-by-message basis, only splitting at the start of any message. Let's say we went for 1,000 me... |
21245579 | PowerShell - Setting $ErrorActionPreference for the entire script | 17 | 2014-01-20 22:35:51 | <p>I've been giving PowerShell (v3.0) a shot for the first time today, and became enormously frustrated with the strange way some of its error-handling concepts are implemented.</p>
<p>I wrote the following piece of code (using the Remote Registry PowerShell Module)</p>
<pre><code>try
{
New-RegKey -ComputerName $... | 25,185 | 1,832,740 | 2014-01-22 04:40:39 | 21,260,623 | 15 | 2014-01-21 14:16:38 | 574,168 | 2014-01-22 04:40:39 | https://stackoverflow.com/q/21245579 | https://stackoverflow.com/a/21260623 | <p>Since you're running V3, you also have the option of using $PSDefaultParameterValues:</p>
<pre><code>$PSDefaultParameterValues += @{'New-RegKey:ErrorAction' = 'Stop'}
</code></pre>
<p>Normally that will change it in the global scope. If you want to isolate it to just the local or script scope, you can initialize ... | <p>Since you're running V3, you also have the option of using $PSDefaultParameterValues:</p> <pre><code>$PSDefaultParameterValues += @{'New-RegKey:ErrorAction' = 'Stop'} </code></pre> <p>Normally that will change it in the global scope. If you want to isolate it to just the local or script scope, you can initialize ... | 379, 526, 22864, 73157 | error-handling, powershell, powershell-3.0, powershell-ise | <h1>PowerShell - Setting $ErrorActionPreference for the entire script</h1>
<p>I've been giving PowerShell (v3.0) a shot for the first time today, and became enormously frustrated with the strange way some of its error-handling concepts are implemented.</p>
<p>I wrote the following piece of code (using the Remote Regis... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,114 | bash | # PowerShell - Setting $ErrorActionPreference for the entire script
I've been giving PowerShell (v3.0) a shot for the first time today, and became enormously frustrated with the strange way some of its error-handling concepts are implemented.
I wrote the following piece of code (using the Remote Registry PowerShell M... | Since you're running V3, you also have the option of using $PSDefaultParameterValues:
```
$PSDefaultParameterValues += @{'New-RegKey:ErrorAction' = 'Stop'}
```
Normally that will change it in the global scope. If you want to isolate it to just the local or script scope, you can initialize a new one in the local scope... |
17846417 | Getting all open PS Sessions on a remote server (from new console window) | 17 | 2013-07-24 23:15:13 | <p>I can start 5 new PS sessions on a remote server and see them all by running Get-PSSession</p>
<pre><code>PS C:\> New-PSSession -ComputerName MyServerName
Id Name ComputerName State ConfigurationName Availability
-- ---- ------------ ----- --------------... | 67,401 | 2,009,405 | 2015-02-11 21:47:53 | 17,849,744 | 15 | 2013-07-25 05:31:15 | 235 | 2013-07-25 05:31:15 | https://stackoverflow.com/q/17846417 | https://stackoverflow.com/a/17849744 | <p>From what I can tell...</p>
<p>The PSSessions you created live on "MyServerName" and, for the duration of the session you first created them, will also be returned by Get-PSSession (with no arguments, in the PowerShell window on the box you're remoting FROM). When you close the session they are created in, the sess... | <p>From what I can tell...</p> <p>The PSSessions you created live on "MyServerName" and, for the duration of the session you first created them, will also be returned by Get-PSSession (with no arguments, in the PowerShell window on the box you're remoting FROM). When you close the session they are created in, the sess... | 526, 8192, 73157 | powershell, powershell-3.0, remote-access | <h1>Getting all open PS Sessions on a remote server (from new console window)</h1>
<p>I can start 5 new PS sessions on a remote server and see them all by running Get-PSSession</p>
<pre><code>PS C:\> New-PSSession -ComputerName MyServerName
Id Name ComputerName State ConfigurationName ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,115 | bash | # Getting all open PS Sessions on a remote server (from new console window)
I can start 5 new PS sessions on a remote server and see them all by running Get-PSSession
```
PS C:\> New-PSSession -ComputerName MyServerName
Id Name ComputerName State ConfigurationName Availability
-- ... | From what I can tell...
The PSSessions you created live on "MyServerName" and, for the duration of the session you first created them, will also be returned by Get-PSSession (with no arguments, in the PowerShell window on the box you're remoting FROM). When you close the session they are created in, the sessions are n... |
10942919 | Customize tab completion in shell | 17 | 2012-06-08 04:02:49 | <p>This may be have a better name than "custom tab completion", but here's the scenario:</p>
<p>Typically when I'm at the command line and I enter a command, followed with {TAB} twice, I get a list of all files and subdirectories in the current directory. For example:</p>
<pre><code>[user@host tmp]$ cat <TAB>&... | 12,281 | 736,937 | 2014-01-31 09:30:18 | 10,947,749 | 15 | 2012-06-08 11:12:55 | 26,428 | 2012-06-08 11:12:55 | https://stackoverflow.com/q/10942919 | https://stackoverflow.com/a/10947749 | <p>You will likely find a file on your system called <code>/etc/bash_completion</code> which is full of functions and <code>complete</code> commands that set up this behavior. The file will be sourced by one of your shell startup files such as <code>~/.bashrc</code>.</p>
<p>There may also be a directory called <code>/... | <p>You will likely find a file on your system called <code>/etc/bash_completion</code> which is full of functions and <code>complete</code> commands that set up this behavior. The file will be sourced by one of your shell startup files such as <code>~/.bashrc</code>.</p> <p>There may also be a directory called <code>/... | 58, 387, 390, 12891, 59778 | bash, bash-completion, linux, shell, tab-completion | <h1>Customize tab completion in shell</h1>
<p>This may be have a better name than "custom tab completion", but here's the scenario:</p>
<p>Typically when I'm at the command line and I enter a command, followed with {TAB} twice, I get a list of all files and subdirectories in the current directory. For example:</p>
<... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,116 | bash | # Customize tab completion in shell
This may be have a better name than "custom tab completion", but here's the scenario:
Typically when I'm at the command line and I enter a command, followed with {TAB} twice, I get a list of all files and subdirectories in the current directory. For example:
```
[user@host tmp]$ c... | You will likely find a file on your system called `/etc/bash_completion` which is full of functions and `complete` commands that set up this behavior. The file will be sourced by one of your shell startup files such as `~/.bashrc`.
There may also be a directory called `/etc/bash_completion.d` which contains individual... |
7196937 | How to speed up Powershell Get-Childitem over UNC | 17 | 2011-08-25 20:43:41 | <p><code>DIR</code> or <code>GCI</code> is slow in Powershell, but fast in CMD. Is there any way to speed this up?</p>
<p>In CMD.exe, after a sub-second delay, this responds as fast as the CMD window can keep up</p>
<pre><code>dir \\remote-server.domain.com\share\folder\file*.*
</code></pre>
<p>In Powershell (v2), a... | 45,242 | 4,126 | 2020-04-14 22:50:15 | 7,208,713 | 15 | 2011-08-26 17:55:46 | null | 2012-09-13 15:49:02 | https://stackoverflow.com/q/7196937 | https://stackoverflow.com/a/7208713 | <p><a href="http://blogs.msdn.com/b/powershell/archive/2009/11/04/why-is-get-childitem-so-slow.aspx" rel="noreferrer">Here</a> is a good explanation on why Get-ChildItem is slow by Lee Holmes. If you take note of the comment from "Anon 11 Mar 2010 11:11 AM" at the bottom of the page his solution might work for you.</p>... | <p><a href="http://blogs.msdn.com/b/powershell/archive/2009/11/04/why-is-get-childitem-so-slow.aspx" rel="noreferrer">Here</a> is a good explanation on why Get-ChildItem is slow by Lee Holmes. If you take note of the comment from "Anon 11 Mar 2010 11:11 AM" at the bottom of the page his solution might work for you.</p>... | 526, 24067 | powershell, powershell-2.0 | <h1>How to speed up Powershell Get-Childitem over UNC</h1>
<p><code>DIR</code> or <code>GCI</code> is slow in Powershell, but fast in CMD. Is there any way to speed this up?</p>
<p>In CMD.exe, after a sub-second delay, this responds as fast as the CMD window can keep up</p>
<pre><code>dir \\remote-server.domain.com\s... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,117 | bash | # How to speed up Powershell Get-Childitem over UNC
`DIR` or `GCI` is slow in Powershell, but fast in CMD. Is there any way to speed this up?
In CMD.exe, after a sub-second delay, this responds as fast as the CMD window can keep up
```
dir \\remote-server.domain.com\share\folder\file*.*
```
In Powershell (v2), afte... | [Here](http://blogs.msdn.com/b/powershell/archive/2009/11/04/why-is-get-childitem-so-slow.aspx) is a good explanation on why Get-ChildItem is slow by Lee Holmes. If you take note of the comment from "Anon 11 Mar 2010 11:11 AM" at the bottom of the page his solution might work for you.
Anon's Code:
```
# SCOPE: SEARCH... |
5809736 | how to use "if" statements inside pipeline | 17 | 2011-04-27 19:51:37 | <p>I'm trying to use <code>if</code> inside a pipeline.</p>
<p>I know that there is <code>where</code> (alias <code>?</code>) filter, but what if I want to activate a filter only if a certain condition is satisfied?</p>
<p>I mean, for example:</p>
<pre class="lang-bash prettyprint-override"><code>get-something | ? {$_.... | 39,968 | 253,811 | 2025-12-02 14:27:46 | 5,810,593 | 15 | 2011-04-27 21:06:54 | 686,969 | 2011-04-27 21:06:54 | https://stackoverflow.com/q/5809736 | https://stackoverflow.com/a/5810593 | <p>When using where-object, the condition doesn't have to strictly be related to the objects that are passing through the pipeline. So consider a case where sometimes we wanted to filter for odd objects, but only if some other condition was met: </p>
<pre><code>$filter = $true
1..10 | ? { (-not $filter) -or ($_ % 2) }... | <p>When using where-object, the condition doesn't have to strictly be related to the objects that are passing through the pipeline. So consider a case where sometimes we wanted to filter for odd objects, but only if some other condition was met: </p> <pre><code>$filter = $true 1..10 | ? { (-not $filter) -or ($_ % 2) }... | 526, 2844, 35241, 39271 | conditional-statements, pipeline, powershell, statements | <h1>how to use "if" statements inside pipeline</h1>
<p>I'm trying to use <code>if</code> inside a pipeline.</p>
<p>I know that there is <code>where</code> (alias <code>?</code>) filter, but what if I want to activate a filter only if a certain condition is satisfied?</p>
<p>I mean, for example:</p>
<pre class="lang-bas... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,118 | bash | # how to use "if" statements inside pipeline
I'm trying to use `if` inside a pipeline.
I know that there is `where` (alias `?`) filter, but what if I want to activate a filter only if a certain condition is satisfied?
I mean, for example:
```
get-something | ? {$_.someone -eq 'somespecific'} | format-table
```
How... | When using where-object, the condition doesn't have to strictly be related to the objects that are passing through the pipeline. So consider a case where sometimes we wanted to filter for odd objects, but only if some other condition was met:
```
$filter = $true
1..10 | ? { (-not $filter) -or ($_ % 2) }
$filter = $fa... |
36802996 | bash: nano: command not found at Windows git bash | 16 | 2016-04-22 20:41:54 | <p>I am using git version 2.7.0.windows.1 on a windows pc, I used the following command:</p>
<pre><code>$ nano README
</code></pre>
<p>which results me:</p>
<pre><code>bash: nano: command not found
</code></pre>
<p>Now how can I install nano text editor to git bash?</p>
| 43,349 | 6,193,267 | 2023-12-04 03:24:09 | 45,717,046 | 15 | 2017-08-16 15:00:36 | 2,750,420 | 2017-08-16 15:00:36 | https://stackoverflow.com/q/36802996 | https://stackoverflow.com/a/45717046 | <p>Little modification of the previous solution (@Simopaa) is worked for me on Windows 10 (without Chocolatey):</p>
<ol>
<li>Download <a href="https://www.nano-editor.org/dist/win32-support/" rel="noreferrer">nano-git</a></li>
<li><p>Move the <code>nano-git-xxx.exe</code> to (for example) <code>C:\Program Files\Git\bi... | <p>Little modification of the previous solution (@Simopaa) is worked for me on Windows 10 (without Chocolatey):</p> <ol> <li>Download <a href="https://www.nano-editor.org/dist/win32-support/" rel="noreferrer">nano-git</a></li> <li><p>Move the <code>nano-git-xxx.exe</code> to (for example) <code>C:\Program Files\Git\bi... | 64, 119, 18209, 61874 | git, git-bash, nano, windows | <h1>bash: nano: command not found at Windows git bash</h1>
<p>I am using git version 2.7.0.windows.1 on a windows pc, I used the following command:</p>
<pre><code>$ nano README
</code></pre>
<p>which results me:</p>
<pre><code>bash: nano: command not found
</code></pre>
<p>Now how can I install nano text editor to ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,119 | bash | # bash: nano: command not found at Windows git bash
I am using git version 2.7.0.windows.1 on a windows pc, I used the following command:
```
$ nano README
```
which results me:
```
bash: nano: command not found
```
Now how can I install nano text editor to git bash? | Little modification of the previous solution (@Simopaa) is worked for me on Windows 10 (without Chocolatey):
1. Download [nano-git](https://www.nano-editor.org/dist/win32-support/)
2. Move the `nano-git-xxx.exe` to (for example) `C:\Program Files\Git\bin`.
3. Modify the `.gitconfig` file with the following (**single**... |
40798249 | Get parent directory of shell script's directory | 16 | 2016-11-25 05:25:53 | <p>I have a shell script here:</p>
<pre><code>/node_modules/.bin/exec.sh
</code></pre>
<p>in the exec.sh script, I want to obtain the path of the directory's parent directory that the script is contained in (not pwd/cwd!). I can obtain the containing directory like so:</p>
<pre><code>`dirname $0`
</code></pre>
<p>w... | 17,531 | 1,223,975 | 2016-11-25 09:22:51 | 40,798,290 | 15 | 2016-11-25 05:29:30 | 5,699,852 | 2016-11-25 05:29:30 | https://stackoverflow.com/q/40798249 | https://stackoverflow.com/a/40798290 | <p>Run dirname twice (nested).</p>
<pre><code>~$ dirname $PWD
/home
~$ dirname `dirname $PWD`
/
~$
</code></pre>
| <p>Run dirname twice (nested).</p> <pre><code>~$ dirname $PWD /home ~$ dirname `dirname $PWD` / ~$ </code></pre> | 387, 390 | bash, shell | <h1>Get parent directory of shell script's directory</h1>
<p>I have a shell script here:</p>
<pre><code>/node_modules/.bin/exec.sh
</code></pre>
<p>in the exec.sh script, I want to obtain the path of the directory's parent directory that the script is contained in (not pwd/cwd!). I can obtain the containing directory... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,120 | bash | # Get parent directory of shell script's directory
I have a shell script here:
```
/node_modules/.bin/exec.sh
```
in the exec.sh script, I want to obtain the path of the directory's parent directory that the script is contained in (not pwd/cwd!). I can obtain the containing directory like so:
```
`dirname $0`
```
... | Run dirname twice (nested).
```
~$ dirname $PWD
/home
~$ dirname `dirname $PWD`
/
~$
``` |
38796224 | POSIX shell equivalent to <() | 16 | 2016-08-05 19:06:35 | <p><code><(commands ...)</code> in bash/zsh makes the output behavior as a file.
Does a POSIX equivalent exist?</p>
| 2,762 | 6,338,087 | 2016-08-05 21:11:24 | 38,796,342 | 15 | 2016-08-05 19:14:41 | 14,122 | 2016-08-05 21:11:24 | https://stackoverflow.com/q/38796224 | https://stackoverflow.com/a/38796342 | <pre><code>mkfifo foo.fifo
## if your "commands" is multiple commands
# { commands ...; } >foo.fifo &
# otherwise, if it's just one
commands ... >foo.fifo &
something_else foo.fifo
</code></pre>
<p>is the closest available equivalent to</p>
<pre><code>something_else <( commands ... )
</code></pre>... | <pre><code>mkfifo foo.fifo ## if your "commands" is multiple commands # { commands ...; } >foo.fifo & # otherwise, if it's just one commands ... >foo.fifo & something_else foo.fifo </code></pre> <p>is the closest available equivalent to</p> <pre><code>something_else <( commands ... ) </code></pre>... | 387, 1993, 3791, 10327, 63638 | bash, posix, process-substitution, sh, zsh | <h1>POSIX shell equivalent to <()</h1>
<p><code><(commands ...)</code> in bash/zsh makes the output behavior as a file.
Does a POSIX equivalent exist?</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,121 | bash | # POSIX shell equivalent to <()
`<(commands ...)` in bash/zsh makes the output behavior as a file.
Does a POSIX equivalent exist? | ```
mkfifo foo.fifo
## if your "commands" is multiple commands
# { commands ...; } >foo.fifo &
# otherwise, if it's just one
commands ... >foo.fifo &
something_else foo.fifo
```
is the closest available equivalent to
```
something_else <( commands ... )
``` |
33381650 | How to list Azure Storage Containers and Blobs | 16 | 2015-10-28 01:58:13 | <p>I'm new to Azure Storage and I think I may be misunderstanding a few of the concepts.</p>
<p>I'd like to list all my Storage Containers and Blobs using PowerShell.</p>
<p>I can list all my Storage Accounts using the following code:</p>
<pre><code>Get-AzureStorageAccount | Select StorageAccountName, GeoPrimaryLoca... | 71,428 | 1,853,167 | 2023-03-03 00:39:31 | 33,381,826 | 15 | 2015-10-28 02:19:04 | 1,567,352 | 2015-10-28 02:19:04 | https://stackoverflow.com/q/33381650 | https://stackoverflow.com/a/33381826 | <p>Not sure if this is what you want, but I am able to list containers using <code>New-AzureStorageContext</code> and <code>Get-AzureStorageContainers</code>.</p>
<pre><code>$ctx = New-AzureStorageContext -StorageAccountName <name> -StorageAccountKey <key>
Get-AzureStorageContainer -Context $ctx
</code></... | <p>Not sure if this is what you want, but I am able to list containers using <code>New-AzureStorageContext</code> and <code>Get-AzureStorageContainers</code>.</p> <pre><code>$ctx = New-AzureStorageContext -StorageAccountName <name> -StorageAccountKey <key> Get-AzureStorageContainer -Context $ctx </code></... | 526, 14158, 35808 | azure, azure-storage, powershell | <h1>How to list Azure Storage Containers and Blobs</h1>
<p>I'm new to Azure Storage and I think I may be misunderstanding a few of the concepts.</p>
<p>I'd like to list all my Storage Containers and Blobs using PowerShell.</p>
<p>I can list all my Storage Accounts using the following code:</p>
<pre><code>Get-AzureSt... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,122 | bash | # How to list Azure Storage Containers and Blobs
I'm new to Azure Storage and I think I may be misunderstanding a few of the concepts.
I'd like to list all my Storage Containers and Blobs using PowerShell.
I can list all my Storage Accounts using the following code:
```
Get-AzureStorageAccount | Select StorageAccou... | Not sure if this is what you want, but I am able to list containers using `New-AzureStorageContext` and `Get-AzureStorageContainers`.
```
$ctx = New-AzureStorageContext -StorageAccountName <name> -StorageAccountKey <key>
Get-AzureStorageContainer -Context $ctx
``` |
15857027 | Bash doesn't parse quotes when converting a string to arguments | 16 | 2013-04-06 23:05:18 | <p>This is my problem. In bash 3:</p>
<pre><code>$ test='One "This is two" Three'
$ set -- $test
$ echo $2
"This
</code></pre>
<p>How to get bash to understand the quotes and return $2 as <code>This is two</code> and not <code>"This</code>? Unfortunately I cannot alter the construction of the variable called <code>te... | 7,679 | 1,568,545 | 2020-04-28 07:18:13 | 15,857,262 | 15 | 2013-04-06 23:44:56 | 89,817 | 2013-04-06 23:44:56 | https://stackoverflow.com/q/15857027 | https://stackoverflow.com/a/15857262 | <p>The reason this happens is because of the order in which the shell parses the command line: it parses (and removes) quotes and escapes, then replaces variable values. By the time <code>$test</code> gets replaced with <code>One "This is two" Three</code>, it's too late for the quotes to have their intended effect.</p... | <p>The reason this happens is because of the order in which the shell parses the command line: it parses (and removes) quotes and escapes, then replaces variable values. By the time <code>$test</code> gets replaced with <code>One "This is two" Three</code>, it's too late for the quotes to have their intended effect.</p... | 139, 387, 2313, 5162, 10804 | arguments, bash, quoting, spaces, string | <h1>Bash doesn't parse quotes when converting a string to arguments</h1>
<p>This is my problem. In bash 3:</p>
<pre><code>$ test='One "This is two" Three'
$ set -- $test
$ echo $2
"This
</code></pre>
<p>How to get bash to understand the quotes and return $2 as <code>This is two</code> and not <code>"This</code>? Unfo... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,123 | bash | # Bash doesn't parse quotes when converting a string to arguments
This is my problem. In bash 3:
```
$ test='One "This is two" Three'
$ set -- $test
$ echo $2
"This
```
How to get bash to understand the quotes and return $2 as `This is two` and not `"This`? Unfortunately I cannot alter the construction of the variab... | The reason this happens is because of the order in which the shell parses the command line: it parses (and removes) quotes and escapes, then replaces variable values. By the time `$test` gets replaced with `One "This is two" Three`, it's too late for the quotes to have their intended effect.
The simple (but dangerous)... |
5773844 | Piping find to find | 16 | 2011-04-24 23:10:17 | <p>I want to pipe a find result to a new find. What I have is:</p>
<pre><code>find . -iname "2010-06*" -maxdepth 1 -type d | xargs -0 find '{}' -iname "*.jpg"
</code></pre>
<p>Expected result: Second find receives a list of folders starting with 2010-06, second find returns a list of jpg's contained within those fold... | 11,916 | 496,999 | 2011-04-25 01:57:32 | 5,773,863 | 15 | 2011-04-24 23:15:04 | 576,139 | 2011-04-24 23:15:04 | https://stackoverflow.com/q/5773844 | https://stackoverflow.com/a/5773863 | <p>You need 2 things. <code>-print0</code>, and more importantly <code>-I{}</code> on xargs, otherwise the <code>{}</code> doesn't do anything.</p>
<pre><code>find . -iname "2010-06*" -maxdepth 1 -type d -print0 | xargs -0 -I{} find '{}' -iname '*.jpg'
</code></pre>
| <p>You need 2 things. <code>-print0</code>, and more importantly <code>-I{}</code> on xargs, otherwise the <code>{}</code> doesn't do anything.</p> <pre><code>find . -iname "2010-06*" -maxdepth 1 -type d -print0 | xargs -0 -I{} find '{}' -iname '*.jpg' </code></pre> | 387, 5813 | bash, pipe | <h1>Piping find to find</h1>
<p>I want to pipe a find result to a new find. What I have is:</p>
<pre><code>find . -iname "2010-06*" -maxdepth 1 -type d | xargs -0 find '{}' -iname "*.jpg"
</code></pre>
<p>Expected result: Second find receives a list of folders starting with 2010-06, second find returns a list of jpg'... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,124 | bash | # Piping find to find
I want to pipe a find result to a new find. What I have is:
```
find . -iname "2010-06*" -maxdepth 1 -type d | xargs -0 find '{}' -iname "*.jpg"
```
Expected result: Second find receives a list of folders starting with 2010-06, second find returns a list of jpg's contained within those folders.... | You need 2 things. `-print0`, and more importantly `-I{}` on xargs, otherwise the `{}` doesn't do anything.
```
find . -iname "2010-06*" -maxdepth 1 -type d -print0 | xargs -0 -I{} find '{}' -iname '*.jpg'
``` |
5643132 | Unable to trap SIGINT signal in a background shell | 16 | 2011-04-13 00:26:33 | <p>I am unable to trap a signal when running in a child / background process.</p>
<p>Here is my simple bash script:</p>
<pre><code>#!/bin/bash
echo "in child"
trap "got_signal" SIGINT
function got_signal {
echo "trapped"
exit 0
}
while [ true ]; do
sleep 2
done
</code></pre>
<p... | 9,853 | 347,565 | 2020-11-25 21:15:30 | 5,643,222 | 15 | 2011-04-13 00:42:10 | 643,977 | 2011-04-13 00:42:10 | https://stackoverflow.com/q/5643132 | https://stackoverflow.com/a/5643222 | <p>The <code>bash</code> manpage on OSX (but it should be the same in other versions) has this to say about signal handling:</p>
<blockquote>
<p>Non-builtin commands run by <code>bash</code> have signal handlers set to the values
inherited by the shell from its parent. When job control is not in
effect, asynchr... | <p>The <code>bash</code> manpage on OSX (but it should be the same in other versions) has this to say about signal handling:</p> <blockquote> <p>Non-builtin commands run by <code>bash</code> have signal handlers set to the values inherited by the shell from its parent. When job control is not in effect, asynchr... | 387, 2481, 25657, 26115, 124485 | bash, bash-trap, child-process, sigint, signals | <h1>Unable to trap SIGINT signal in a background shell</h1>
<p>I am unable to trap a signal when running in a child / background process.</p>
<p>Here is my simple bash script:</p>
<pre><code>#!/bin/bash
echo "in child"
trap "got_signal" SIGINT
function got_signal {
echo "trapped"
ex... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,125 | bash | # Unable to trap SIGINT signal in a background shell
I am unable to trap a signal when running in a child / background process.
Here is my simple bash script:
```
#!/bin/bash
echo "in child"
trap "got_signal" SIGINT
function got_signal {
echo "trapped"
exit 0
}
while [ true ]; do
sleep 2
done
```
When r... | The `bash` manpage on OSX (but it should be the same in other versions) has this to say about signal handling:
> Non-builtin commands run by `bash` have signal handlers set to the values
> inherited by the shell from its parent. When job control is not in
> effect, asynchronous commands ignore `SIGINT` and `SIGQUIT` i... |
3984001 | Mercurial color extension in Windows Powershell | 16 | 2010-10-21 03:08:04 | <p>Is there a way to enable color support for Mercurial in Powershell on Windows 7? The <a href="https://www.mercurial-scm.org/wiki/ColorExtension" rel="nofollow noreferrer">ColorExtension</a> page says to add</p>
<pre><code>[color]
mode = win32
</code></pre>
<p>to your <code>.hgrc</code> file, but it doesn't seem t... | 1,893 | 247,763 | 2018-02-22 12:10:52 | 4,015,784 | 15 | 2010-10-25 14:53:49 | 8,718 | 2010-10-25 14:53:49 | https://stackoverflow.com/q/3984001 | https://stackoverflow.com/a/4015784 | <p>You probably need to update to the latest mercurial (1.6.4). Version 1.5.4 in particular didn't do win32 color properly (and there have been quite a few color-related and win32-related bugs fixed in recent builds).</p>
<p>You also need to make sure you're not specifying ANSI color mode. You can force win32:</p>
<... | <p>You probably need to update to the latest mercurial (1.6.4). Version 1.5.4 in particular didn't do win32 color properly (and there have been quite a few color-related and win32-related bugs fixed in recent builds).</p> <p>You also need to make sure you're not specifying ANSI color mode. You can force win32:</p> <... | 64, 526, 802, 3346 | dvcs, mercurial, powershell, windows | <h1>Mercurial color extension in Windows Powershell</h1>
<p>Is there a way to enable color support for Mercurial in Powershell on Windows 7? The <a href="https://www.mercurial-scm.org/wiki/ColorExtension" rel="nofollow noreferrer">ColorExtension</a> page says to add</p>
<pre><code>[color]
mode = win32
</code></pre>
... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,126 | bash | # Mercurial color extension in Windows Powershell
Is there a way to enable color support for Mercurial in Powershell on Windows 7? The [ColorExtension](https://www.mercurial-scm.org/wiki/ColorExtension) page says to add
```
[color]
mode = win32
```
to your `.hgrc` file, but it doesn't seem to make a difference.
Run... | You probably need to update to the latest mercurial (1.6.4). Version 1.5.4 in particular didn't do win32 color properly (and there have been quite a few color-related and win32-related bugs fixed in recent builds).
You also need to make sure you're not specifying ANSI color mode. You can force win32:
```
[color]
mode... |
2193231 | Display function definition in interactive shell | 16 | 2010-02-03 15:55:06 | <p>I am working in the Python Interactive Shell (ActiveState ActivePython 2.6.4 under Windows XP). I created a function that does what I want. However, I've cleared the screen so I can't go back and look at the function definition. It is also a multiline function so the up arrow to redisplay lines is of minimal value. ... | 25,177 | 245,029 | 2022-06-30 08:24:56 | 2,193,342 | 15 | 2010-02-03 16:07:04 | 95,810 | 2010-02-03 16:07:04 | https://stackoverflow.com/q/2193231 | https://stackoverflow.com/a/2193342 | <p>No, <code>__code__</code> and <code>func_code</code> are references to the compiled bytecode -- you can disassemble them (see <code>dis.dis</code>) but not get back to the Python source code.</p>
<p>Alas, the source code is simply gone, not remembered anywhere...:</p>
<pre><code>>>> import inspect
>>... | <p>No, <code>__code__</code> and <code>func_code</code> are references to the compiled bytecode -- you can disassemble them (see <code>dis.dis</code>) but not get back to the Python source code.</p> <p>Alas, the source code is simply gone, not remembered anywhere...:</p> <pre><code>>>> import inspect >>... | 16, 390 | python, shell | <h1>Display function definition in interactive shell</h1>
<p>I am working in the Python Interactive Shell (ActiveState ActivePython 2.6.4 under Windows XP). I created a function that does what I want. However, I've cleared the screen so I can't go back and look at the function definition. It is also a multiline functio... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,127 | bash | # Display function definition in interactive shell
I am working in the Python Interactive Shell (ActiveState ActivePython 2.6.4 under Windows XP). I created a function that does what I want. However, I've cleared the screen so I can't go back and look at the function definition. It is also a multiline function so the ... | No, `__code__` and `func_code` are references to the compiled bytecode -- you can disassemble them (see `dis.dis`) but not get back to the Python source code.
Alas, the source code is simply gone, not remembered anywhere...:
```
>>> import inspect
>>> def f():
... print 'ciao'
...
>>> inspect.getsource(f)
Tracebac... |
1199931 | How to expand a CMD shell variable twice (recursively) | 16 | 2009-07-29 12:33:53 | <p>Using the Windows XP CMD command-line I can expand a variable twice as follows:</p>
<pre><code>set AAA=BBB
set BBB=CCC
for /F "usebackq tokens=*" %i in (`echo %%AAA%%`) do echo %i
</code></pre>
<p>will echo <code>CCC</code>. I.e. <code>AAA</code> has been expanded to the string <code>BBB</code>, and then the varia... | 16,117 | 84,538 | 2019-03-06 00:22:26 | 1,200,871 | 15 | 2009-07-29 14:54:12 | 103,043 | 2009-07-30 13:06:12 | https://stackoverflow.com/q/1199931 | https://stackoverflow.com/a/1200871 | <p>Thinking in terms of a less tortuous solution, this, too, produces the <code>CCC</code> you desire.</p>
<pre><code>setlocal enabledelayedexpansion
set AAA=BBB
set BBB=CCC
for /F %%a in ('echo %AAA%') do echo !%%a!
</code></pre>
<p><strong>edit:</strong></p>
<p>to dissect this answer:</p>
<p><code>setlocal enab... | <p>Thinking in terms of a less tortuous solution, this, too, produces the <code>CCC</code> you desire.</p> <pre><code>setlocal enabledelayedexpansion set AAA=BBB set BBB=CCC for /F %%a in ('echo %AAA%') do echo !%%a! </code></pre> <p><strong>edit:</strong></p> <p>to dissect this answer:</p> <p><code>setlocal enab... | 64, 390, 531, 2631, 7002 | batch-file, cmd, scripting, shell, windows | <h1>How to expand a CMD shell variable twice (recursively)</h1>
<p>Using the Windows XP CMD command-line I can expand a variable twice as follows:</p>
<pre><code>set AAA=BBB
set BBB=CCC
for /F "usebackq tokens=*" %i in (`echo %%AAA%%`) do echo %i
</code></pre>
<p>will echo <code>CCC</code>. I.e. <code>AAA</code> has ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,128 | bash | # How to expand a CMD shell variable twice (recursively)
Using the Windows XP CMD command-line I can expand a variable twice as follows:
```
set AAA=BBB
set BBB=CCC
for /F "usebackq tokens=*" %i in (`echo %%AAA%%`) do echo %i
```
will echo `CCC`. I.e. `AAA` has been expanded to the string `BBB`, and then the variabl... | Thinking in terms of a less tortuous solution, this, too, produces the `CCC` you desire.
```
setlocal enabledelayedexpansion
set AAA=BBB
set BBB=CCC
for /F %%a in ('echo %AAA%') do echo !%%a!
```
**edit:**
to dissect this answer:
`setlocal enabledelayedexpansion` - this will allow for any environment variable set... |
46061694 | bash: Why can't I set a trap for SIGINT in a background shell? | 15 | 2017-09-05 19:01:24 | <p>Here's a simple program that registers two <code>trap</code> handlers and then displays them with <code>trap -p</code>. Then it does the same thing, but in a child background process.</p>
<p>Why does the background process ignore the <code>SIGINT</code> trap?</p>
<pre class="lang-bash prettyprint-override"><code>... | 1,557 | 162,094 | 2022-05-26 21:58:47 | 46,061,734 | 15 | 2017-09-05 19:04:21 | 1,084,774 | 2022-05-26 21:58:47 | https://stackoverflow.com/q/46061694 | https://stackoverflow.com/a/46061734 | <p><code>SIGINT</code> and <code>SIGQUIT</code> are ignored in backgrounded processes (unless they're backgrounded with <code>set -m</code> on). It's a (weird) POSIX requirement (see <a href="http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html" rel="nofollow noreferrer">
2. Shell Command Language</... | <p><code>SIGINT</code> and <code>SIGQUIT</code> are ignored in backgrounded processes (unless they're backgrounded with <code>set -m</code> on). It's a (weird) POSIX requirement (see <a href="http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html" rel="nofollow noreferrer"> 2. Shell Command Language</... | 387, 2481, 25657, 26115, 124485 | bash, bash-trap, child-process, sigint, signals | <h1>bash: Why can't I set a trap for SIGINT in a background shell?</h1>
<p>Here's a simple program that registers two <code>trap</code> handlers and then displays them with <code>trap -p</code>. Then it does the same thing, but in a child background process.</p>
<p>Why does the background process ignore the <code>SIG... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,129 | bash | # bash: Why can't I set a trap for SIGINT in a background shell?
Here's a simple program that registers two `trap` handlers and then displays them with `trap -p`. Then it does the same thing, but in a child background process.
Why does the background process ignore the `SIGINT` trap?
```
#!/bin/bash
echo "Traps on ... | `SIGINT` and `SIGQUIT` are ignored in backgrounded processes (unless they're backgrounded with `set -m` on). It's a (weird) POSIX requirement (see [2. Shell Command Language](http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html) or my SO question [Why do shells ignore SIGINT and SIGQUIT in backgroun... |
45999187 | Creating filename_$(date %Y-%m-%d) from systemd bash inline script | 15 | 2017-09-01 11:21:25 | <p>I am trying to execute a <code>systemd</code> timer and would like to keep the output from the executed script in a file per date. Here is my <code>ExecStart</code> script in the <code>.service</code> file:</p>
<pre><code>ExecStart=/bin/bash -c 'echo $(date +%Y-%m-%d) >> /home/username/test_output_$(date +%Y-... | 14,215 | 5,211,086 | 2017-09-01 14:01:48 | 46,001,754 | 15 | 2017-09-01 13:53:56 | 1,312,096 | 2017-09-01 14:01:48 | https://stackoverflow.com/q/45999187 | https://stackoverflow.com/a/46001754 | <p>You'll need to escape the <strong>$</strong> and <strong>%</strong> signs, by doubling them both in order to make this work.</p>
<p>As described here:</p>
<ul>
<li><a href="https://github.com/systemd/systemd/issues/2146" rel="noreferrer">https://github.com/systemd/systemd/issues/2146</a></li>
<li><a href="https://... | <p>You'll need to escape the <strong>$</strong> and <strong>%</strong> signs, by doubling them both in order to make this work.</p> <p>As described here:</p> <ul> <li><a href="https://github.com/systemd/systemd/issues/2146" rel="noreferrer">https://github.com/systemd/systemd/issues/2146</a></li> <li><a href="https://... | 58, 387, 4847, 5002, 81442 | bash, date, inline, linux, systemd | <h1>Creating filename_$(date %Y-%m-%d) from systemd bash inline script</h1>
<p>I am trying to execute a <code>systemd</code> timer and would like to keep the output from the executed script in a file per date. Here is my <code>ExecStart</code> script in the <code>.service</code> file:</p>
<pre><code>ExecStart=/bin/bas... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,130 | bash | # Creating filename_$(date %Y-%m-%d) from systemd bash inline script
I am trying to execute a `systemd` timer and would like to keep the output from the executed script in a file per date. Here is my `ExecStart` script in the `.service` file:
```
ExecStart=/bin/bash -c 'echo $(date +%Y-%m-%d) >> /home/username/test_o... | You'll need to escape the **$** and **%** signs, by doubling them both in order to make this work.
As described here:
- <https://github.com/systemd/systemd/issues/2146>
- <https://www.freedesktop.org/software/systemd/man/systemd.service.html#Command%20lines>
> To pass a literal dollar sign, use "$$"
```
ExecStart=/... |
44343562 | What is the difference between Shell and ShellEx in Windows Registry? | 15 | 2017-06-03 11:45:35 | <p>I'm trying to add a custom context menu in windows registry, I found a shell key and shellex key that seems to both work the same thing? Why is there 2 and what are they for?</p>
| 13,507 | 245,904 | 2017-06-03 13:18:50 | 44,344,378 | 15 | 2017-06-03 13:18:50 | 3,501 | 2017-06-03 13:18:50 | https://stackoverflow.com/q/44343562 | https://stackoverflow.com/a/44344378 | <p>The <code>Shell</code> key is for <a href="https://msdn.microsoft.com/en-us/library/windows/desktop/cc144175(v=vs.85).aspx" rel="noreferrer">static verbs</a> used by <code>ShellExecute</code> and file-type context menus. They are simple to implement because they are just a string that specifies the command. They can... | <p>The <code>Shell</code> key is for <a href="https://msdn.microsoft.com/en-us/library/windows/desktop/cc144175(v=vs.85).aspx" rel="noreferrer">static verbs</a> used by <code>ShellExecute</code> and file-type context menus. They are simple to implement because they are just a string that specifies the command. They can... | 64, 263, 7839 | registry, shellexecute, windows | <h1>What is the difference between Shell and ShellEx in Windows Registry?</h1>
<p>I'm trying to add a custom context menu in windows registry, I found a shell key and shellex key that seems to both work the same thing? Why is there 2 and what are they for?</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,131 | bash | # What is the difference between Shell and ShellEx in Windows Registry?
I'm trying to add a custom context menu in windows registry, I found a shell key and shellex key that seems to both work the same thing? Why is there 2 and what are they for? | The `Shell` key is for [static verbs](https://msdn.microsoft.com/en-us/library/windows/desktop/cc144175(v=vs.85).aspx) used by `ShellExecute` and file-type context menus. They are simple to implement because they are just a string that specifies the command. They can be extended with optional COM objects (DropTarget et... |
39497196 | missing end to balance this if statement | 15 | 2016-09-14 18:23:44 | <p>i try to add this lines to my .bash-profile </p>
<pre><code>if [ -f "$(brew --prefix)/opt/bash-git-prompt/share/gitprompt.sh" ];then
source "$(brew --prefix)/opt/bash-git-prompt/share/gitprompt.sh"
fi
</code></pre>
<p>but I get this error</p>
<pre><code>Missing end to balance this if statement
.bash_profile (lin... | 17,464 | 5,550,399 | 2016-09-14 18:37:26 | 39,497,441 | 15 | 2016-09-14 18:37:26 | 1,126,841 | 2016-09-14 18:37:26 | https://stackoverflow.com/q/39497196 | https://stackoverflow.com/a/39497441 | <p>Although the linked repository contains a script for <code>fish</code>, the README does not provide any directions for how to <em>use</em> that script. Not having used <code>fish</code> in several years, I <em>think</em> what you want to do is add</p>
<pre><code>if status --is-login
source (brew --prefix)"/opt/ba... | <p>Although the linked repository contains a script for <code>fish</code>, the README does not provide any directions for how to <em>use</em> that script. Not having used <code>fish</code> in several years, I <em>think</em> what you want to do is add</p> <pre><code>if status --is-login source (brew --prefix)"/opt/ba... | 34, 119, 387, 390, 55824 | bash, fish, git, shell, unix | <h1>missing end to balance this if statement</h1>
<p>i try to add this lines to my .bash-profile </p>
<pre><code>if [ -f "$(brew --prefix)/opt/bash-git-prompt/share/gitprompt.sh" ];then
source "$(brew --prefix)/opt/bash-git-prompt/share/gitprompt.sh"
fi
</code></pre>
<p>but I get this error</p>
<pre><code>Missing e... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,132 | bash | # missing end to balance this if statement
i try to add this lines to my .bash-profile
```
if [ -f "$(brew --prefix)/opt/bash-git-prompt/share/gitprompt.sh" ];then
source "$(brew --prefix)/opt/bash-git-prompt/share/gitprompt.sh"
fi
```
but I get this error
```
Missing end to balance this if statement
.bash_profile... | Although the linked repository contains a script for `fish`, the README does not provide any directions for how to *use* that script. Not having used `fish` in several years, I *think* what you want to do is add
```
if status --is-login
source (brew --prefix)"/opt/bash-git-prompt/share/gitprompt.fish"
end
```
to `~... |
33038848 | How to exclude non-valued object properties when converting to JSON in Powershell | 15 | 2015-10-09 12:55:04 | <p>I have a piece of code that works but I want to know if there is a better way to do it. I could not find anything related so far. Here are the facts:</p>
<ul>
<li>I have an object with n properties.</li>
<li>I want to convert this object to JSON using (ConvertTo-Json).</li>
<li>I don't want to include in the JSON t... | 14,950 | 2,878,438 | 2023-10-14 19:30:41 | 33,039,561 | 15 | 2015-10-09 13:28:41 | 4,424,236 | 2015-10-09 13:28:41 | https://stackoverflow.com/q/33038848 | https://stackoverflow.com/a/33039561 | <p>Something like this?</p>
<pre><code>$object = New-Object PSObject
Add-Member -InputObject $object -MemberType NoteProperty -Name TableName -Value "MyTable"
Add-Member -InputObject $object -MemberType NoteProperty -Name Description -Value "Lorem ipsum dolor.."
Add-Member -InputObject $object -MemberType NotePropert... | <p>Something like this?</p> <pre><code>$object = New-Object PSObject Add-Member -InputObject $object -MemberType NoteProperty -Name TableName -Value "MyTable" Add-Member -InputObject $object -MemberType NoteProperty -Name Description -Value "Lorem ipsum dolor.." Add-Member -InputObject $object -MemberType NotePropert... | 526, 1508, 95686 | json, powershell, powershell-4.0 | <h1>How to exclude non-valued object properties when converting to JSON in Powershell</h1>
<p>I have a piece of code that works but I want to know if there is a better way to do it. I could not find anything related so far. Here are the facts:</p>
<ul>
<li>I have an object with n properties.</li>
<li>I want to convert... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,133 | bash | # How to exclude non-valued object properties when converting to JSON in Powershell
I have a piece of code that works but I want to know if there is a better way to do it. I could not find anything related so far. Here are the facts:
- I have an object with n properties.
- I want to convert this object to JSON using ... | Something like this?
```
$object = New-Object PSObject
Add-Member -InputObject $object -MemberType NoteProperty -Name TableName -Value "MyTable"
Add-Member -InputObject $object -MemberType NoteProperty -Name Description -Value "Lorem ipsum dolor.."
Add-Member -InputObject $object -MemberType NoteProperty -Name AppAre... |
32761627 | Bash: How can I grep a line for multiple instances of the same string? | 15 | 2015-09-24 12:42:03 | <p>I've got several lines that look like this:</p>
<pre><code>aaaaaaaaxzaaaaaaaaaaaaaa
bbbbbbbbbbbbxzbbbbbbxzbb
ccxzcccccccccccccccccxzc
dddddddxzddddddddddddddd
</code></pre>
<p>Inside two of those lines, there are <strong>two</strong> instances of <code>xz</code> characters. I want grep to look for <code>xz</code> ... | 22,360 | 2,541,806 | 2015-09-24 13:05:16 | 32,761,714 | 15 | 2015-09-24 12:46:09 | 3,832,970 | 2015-09-24 13:05:16 | https://stackoverflow.com/q/32761627 | https://stackoverflow.com/a/32761714 | <p>You can use </p>
<pre><code>cat lines | grep 'xz.*xz'
</code></pre>
<p>Or just </p>
<pre><code>grep 'xz.*xz' lines
</code></pre>
<p>The <code>.*</code> will match optional characters (any but a newline) between 2 <code>xz</code>.</p>
<p>In case you need to use look-arounds, you will need <code>-P</code> switch... | <p>You can use </p> <pre><code>cat lines | grep 'xz.*xz' </code></pre> <p>Or just </p> <pre><code>grep 'xz.*xz' lines </code></pre> <p>The <code>.*</code> will match optional characters (any but a newline) between 2 <code>xz</code>.</p> <p>In case you need to use look-arounds, you will need <code>-P</code> switch... | 18, 387, 1271 | bash, grep, regex | <h1>Bash: How can I grep a line for multiple instances of the same string?</h1>
<p>I've got several lines that look like this:</p>
<pre><code>aaaaaaaaxzaaaaaaaaaaaaaa
bbbbbbbbbbbbxzbbbbbbxzbb
ccxzcccccccccccccccccxzc
dddddddxzddddddddddddddd
</code></pre>
<p>Inside two of those lines, there are <strong>two</strong> i... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,134 | bash | # Bash: How can I grep a line for multiple instances of the same string?
I've got several lines that look like this:
```
aaaaaaaaxzaaaaaaaaaaaaaa
bbbbbbbbbbbbxzbbbbbbxzbb
ccxzcccccccccccccccccxzc
dddddddxzddddddddddddddd
```
Inside two of those lines, there are **two** instances of `xz` characters. I want grep to lo... | You can use
```
cat lines | grep 'xz.*xz'
```
Or just
```
grep 'xz.*xz' lines
```
The `.*` will match optional characters (any but a newline) between 2 `xz`.
In case you need to use look-arounds, you will need `-P` switch to enable Perl-like regexps. |
29986413 | GPG key exists in the list? | 15 | 2015-05-01 11:57:12 | <p>I want to create a shell script and I haven't worked with it before.
There is a command for gpg:</p>
<pre><code>gpg --keyserver SERVER --recv-keys KEY
</code></pre>
<p>The problem is that I don't want to run this command if key has been already added. Is there any method to check that key exists in keys list?
Th... | 12,241 | 1,236,038 | 2022-02-27 23:20:04 | 29,986,943 | 15 | 2015-05-01 12:35:28 | 695,343 | 2015-05-01 12:35:28 | https://stackoverflow.com/q/29986413 | https://stackoverflow.com/a/29986943 | <p>Run <code>gpg --list-keys [key-id]</code> (or the abbreviated command <code>-k</code>), which will have a return code of 0 (success) if a matching key exists, or something else (failure) otherwise. Don't list all keys and <code>grep</code> afterwards as proposed by others in the comments, this will get <em>horribly<... | <p>Run <code>gpg --list-keys [key-id]</code> (or the abbreviated command <code>-k</code>), which will have a return code of 0 (success) if a matching key exists, or something else (failure) otherwise. Don't list all keys and <code>grep</code> afterwards as proposed by others in the comments, this will get <em>horribly<... | 387, 390, 6735 | bash, gnupg, shell | <h1>GPG key exists in the list?</h1>
<p>I want to create a shell script and I haven't worked with it before.
There is a command for gpg:</p>
<pre><code>gpg --keyserver SERVER --recv-keys KEY
</code></pre>
<p>The problem is that I don't want to run this command if key has been already added. Is there any method to c... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,135 | bash | # GPG key exists in the list?
I want to create a shell script and I haven't worked with it before.
There is a command for gpg:
```
gpg --keyserver SERVER --recv-keys KEY
```
The problem is that I don't want to run this command if key has been already added. Is there any method to check that key exists in keys list?... | Run `gpg --list-keys [key-id]` (or the abbreviated command `-k`), which will have a return code of 0 (success) if a matching key exists, or something else (failure) otherwise. Don't list all keys and `grep` afterwards as proposed by others in the comments, this will get *horribly* slow for larger numbers of keys in the... |
20528282 | how to update homebrew with Cron on Mac os | 15 | 2013-12-11 19:31:09 | <p>I've been discvering some long lasting linux techs to help automate my daily work. I found <code>cron</code> to be very powerful if I can use it to check the updates of some packages I have on my system. </p>
<p>For example, I want to update my <code>Homebrew</code> everyday at 11pm. What I did is, with <code>sudo ... | 10,040 | 1,610,143 | 2020-03-17 18:04:40 | 25,639,070 | 15 | 2014-09-03 07:52:54 | 517,914 | 2020-03-17 18:04:40 | https://stackoverflow.com/q/20528282 | https://stackoverflow.com/a/25639070 | <p>A cronjob is a good option, but I didn't want it to happen automatically. I found a <a href="http://chrisstreeter.com/archive/2012/08/homebrew-package-update-notifications-on-mountain-lion.html" rel="noreferrer">script</a> that will notify you if a new version of a formula installed on your Mac is available. </p>
<... | <p>A cronjob is a good option, but I didn't want it to happen automatically. I found a <a href="http://chrisstreeter.com/archive/2012/08/homebrew-package-update-notifications-on-mountain-lion.html" rel="noreferrer">script</a> that will notify you if a new version of a formula installed on your Mac is available. </p> <... | 58, 369, 387, 601 | bash, cron, linux, macos | <h1>how to update homebrew with Cron on Mac os</h1>
<p>I've been discvering some long lasting linux techs to help automate my daily work. I found <code>cron</code> to be very powerful if I can use it to check the updates of some packages I have on my system. </p>
<p>For example, I want to update my <code>Homebrew</cod... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,136 | bash | # how to update homebrew with Cron on Mac os
I've been discvering some long lasting linux techs to help automate my daily work. I found `cron` to be very powerful if I can use it to check the updates of some packages I have on my system.
For example, I want to update my `Homebrew` everyday at 11pm. What I did is, wit... | A cronjob is a good option, but I didn't want it to happen automatically. I found a [script](http://chrisstreeter.com/archive/2012/08/homebrew-package-update-notifications-on-mountain-lion.html) that will notify you if a new version of a formula installed on your Mac is available.
I extended the [script](https://gist.... |
20850289 | Comparing two json files : shell scripting | 15 | 2013-12-31 01:22:30 | <p>I'm comparing two json files which look like:</p>
<pre><code>[
{
"type" : 1,
"children" : {
"nsubj" : {
"role" : "topic",
"POS" : [
"noun"
]
}
},
"... | 28,668 | 2,626,221 | 2025-09-03 13:22:30 | 20,850,306 | 15 | 2013-12-31 01:24:28 | 220,700 | 2013-12-31 01:24:28 | https://stackoverflow.com/q/20850289 | https://stackoverflow.com/a/20850306 | <p>Just use diff. Like in</p>
<pre><code>diff --unified file1.json file2.json
</code></pre>
| <p>Just use diff. Like in</p> <pre><code>diff --unified file1.json file2.json </code></pre> | 390, 606, 1508, 105170 | diff, jq, json, shell | <h1>Comparing two json files : shell scripting</h1>
<p>I'm comparing two json files which look like:</p>
<pre><code>[
{
"type" : 1,
"children" : {
"nsubj" : {
"role" : "topic",
"POS" : [
"noun... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,137 | bash | # Comparing two json files : shell scripting
I'm comparing two json files which look like:
```
[
{
"type" : 1,
"children" : {
"nsubj" : {
"role" : "topic",
"POS" : [
"noun"
]
}
},
"role" : "vehicle",
"POS" : [
... | Just use diff. Like in
```
diff --unified file1.json file2.json
``` |
18607788 | How to distinguish between empty argument and zero-value argument in Powershell? | 15 | 2013-09-04 07:23:42 | <p>I want to be able to pass a single int through to a powershell script, and be able to tell when no variable is passed. My understanding was that the following should identify whether an argument is null or not:</p>
<pre><code>if (!$args[0]) { Write-Host "Null" }
else { Write-Host "Not null" }
</code></pre>
<p>Thi... | 30,992 | 758,231 | 2024-10-07 04:24:39 | 18,607,991 | 15 | 2013-09-04 07:35:37 | 608,772 | 2024-10-07 04:24:39 | https://stackoverflow.com/q/18607788 | https://stackoverflow.com/a/18607991 | <p>You can just test <code>$args</code> variable or <code>$args.count</code> to see how many vars are passed to the script.</p>
<p>Another thing : <code>$args[0] -eq $null</code> is different from <code>$args[0] -eq 0</code> and from <code>!$args[0]</code>.</p>
<ol>
<li><strong>$args[0] -eq $null</strong> : This chec... | <p>You can just test <code>$args</code> variable or <code>$args.count</code> to see how many vars are passed to the script.</p> <p>Another thing : <code>$args[0] -eq $null</code> is different from <code>$args[0] -eq 0</code> and from <code>!$args[0]</code>.</p> <ol> <li><strong>$args[0] -eq $null</strong> : This chec... | 526, 694, 2773, 15517 | if-statement, null, powershell, zero | <h1>How to distinguish between empty argument and zero-value argument in Powershell?</h1>
<p>I want to be able to pass a single int through to a powershell script, and be able to tell when no variable is passed. My understanding was that the following should identify whether an argument is null or not:</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 | 9,138 | bash | # How to distinguish between empty argument and zero-value argument in Powershell?
I want to be able to pass a single int through to a powershell script, and be able to tell when no variable is passed. My understanding was that the following should identify whether an argument is null or not:
```
if (!$args[0]) { Wri... | You can just test `$args` variable or `$args.count` to see how many vars are passed to the script.
Another thing : `$args[0] -eq $null` is different from `$args[0] -eq 0` and from `!$args[0]`.
1. **$args[0] -eq $null** : This checks if the first argument in the $args array is equal to $null. If $args[0] is $null, it ... |
18344551 | Move file as root preserving ownership linux | 15 | 2013-08-20 20:39:30 | <p>OS: Debian.
I want to be able to move files and folders around as root and from the command line without changing it's owner and group.
Is this possible? </p>
| 45,354 | 1,955,740 | 2013-08-20 20:49:42 | 18,344,595 | 15 | 2013-08-20 20:42:09 | 986,485 | 2013-08-20 20:42:09 | https://stackoverflow.com/q/18344551 | https://stackoverflow.com/a/18344595 | <p>rsync :</p>
<pre><code> -A, --acls preserve ACLs (implies --perms)
-X, --xattrs preserve extended attributes
-o, --owner preserve owner (super-user only)
-g, --group preserve group
--devices preserve device files (super-user only)... | <p>rsync :</p> <pre><code> -A, --acls preserve ACLs (implies --perms) -X, --xattrs preserve extended attributes -o, --owner preserve owner (super-user only) -g, --group preserve group --devices preserve device files (super-user only)... | 58, 390, 391, 1231, 1796 | command, command-line, linux, shell, terminal | <h1>Move file as root preserving ownership linux</h1>
<p>OS: Debian.
I want to be able to move files and folders around as root and from the command line without changing it's owner and group.
Is this possible? </p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,139 | bash | # Move file as root preserving ownership linux
OS: Debian.
I want to be able to move files and folders around as root and from the command line without changing it's owner and group.
Is this possible? | rsync :
```
-A, --acls preserve ACLs (implies --perms)
-X, --xattrs preserve extended attributes
-o, --owner preserve owner (super-user only)
-g, --group preserve group
--devices preserve device files (super-user only)
--specia... |
17548854 | Difference between Mac `find` and Linux `find` | 15 | 2013-07-09 13:01:55 | <p>I have inherited a script as part of a build process for an application, and when I run it on the build server (Ubuntu Precise) it runs fine, but when I run it on my mac I get "illegal option -- t". The command that has problems is simple, it's just a call to <code>find</code>:</p>
<pre><code>find -type f -not -pat... | 8,794 | 907,981 | 2013-07-09 13:08:02 | 17,548,983 | 15 | 2013-07-09 13:08:02 | 2,235,132 | 2013-07-09 13:08:02 | https://stackoverflow.com/q/17548854 | https://stackoverflow.com/a/17548983 | <p>The <a href="http://pubs.opengroup.org/onlinepubs/9699919799/utilities/find.html" rel="noreferrer">standard</a> mandates the path (<code>./</code> in your example) to be mandatory. <code>find</code> on MacOS follows the standard.</p>
<p><code>GNU find</code> (the one available on Linux) allows the path to be optio... | <p>The <a href="http://pubs.opengroup.org/onlinepubs/9699919799/utilities/find.html" rel="noreferrer">standard</a> mandates the path (<code>./</code> in your example) to be mandatory. <code>find</code> on MacOS follows the standard.</p> <p><code>GNU find</code> (the one available on Linux) allows the path to be optio... | 34, 369, 390, 10193 | find, macos, shell, unix | <h1>Difference between Mac `find` and Linux `find`</h1>
<p>I have inherited a script as part of a build process for an application, and when I run it on the build server (Ubuntu Precise) it runs fine, but when I run it on my mac I get "illegal option -- t". The command that has problems is simple, it's just a call to <... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,140 | bash | # Difference between Mac `find` and Linux `find`
I have inherited a script as part of a build process for an application, and when I run it on the build server (Ubuntu Precise) it runs fine, but when I run it on my mac I get "illegal option -- t". The command that has problems is simple, it's just a call to `find`:
`... | The [standard](http://pubs.opengroup.org/onlinepubs/9699919799/utilities/find.html) mandates the path (`./` in your example) to be mandatory. `find` on MacOS follows the standard.
`GNU find` (the one available on Linux) allows the path to be optional. If not specified, the current directory is assumed to be the path. ... |
8794645 | MongoDB remove GridFS objects from shell | 15 | 2012-01-09 20:20:34 | <p>I have files stored in a MongoDB using GridFS. I need to remove some of those files by ID, from the JavaScript shell. I need to remove a single file using it's ID. I figured I could just do this:</p>
<pre><code>db.fs.files.remove({_id: my_id});
</code></pre>
<p>This works to some extent; it removes the file from t... | 20,082 | 104,999 | 2019-03-04 16:40:39 | 8,794,871 | 15 | 2012-01-09 20:37:47 | 683,201 | 2012-01-09 21:40:39 | https://stackoverflow.com/q/8794645 | https://stackoverflow.com/a/8794871 | <p>You want to use <code>db.fs.delete(_id);</code> instead.</p>
<p><strong>Update</strong>
Sorry, that apparently doesn't work from the shell, only through the driver. GridFS is a specification for storage implemented by the drivers. Looks like it doesn't have much built-in functionality from the shell, as such.</p>
... | <p>You want to use <code>db.fs.delete(_id);</code> instead.</p> <p><strong>Update</strong> Sorry, that apparently doesn't work from the shell, only through the driver. GridFS is a specification for storage implemented by the drivers. Looks like it doesn't have much built-in functionality from the shell, as such.</p> ... | 3, 390, 30073, 51700 | gridfs, javascript, mongodb, shell | <h1>MongoDB remove GridFS objects from shell</h1>
<p>I have files stored in a MongoDB using GridFS. I need to remove some of those files by ID, from the JavaScript shell. I need to remove a single file using it's ID. I figured I could just do this:</p>
<pre><code>db.fs.files.remove({_id: my_id});
</code></pre>
<p>Thi... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,141 | bash | # MongoDB remove GridFS objects from shell
I have files stored in a MongoDB using GridFS. I need to remove some of those files by ID, from the JavaScript shell. I need to remove a single file using it's ID. I figured I could just do this:
```
db.fs.files.remove({_id: my_id});
```
This works to some extent; it remove... | You want to use `db.fs.delete(_id);` instead.
**Update**
Sorry, that apparently doesn't work from the shell, only through the driver. GridFS is a specification for storage implemented by the drivers. Looks like it doesn't have much built-in functionality from the shell, as such.
**Update 2** There is also a command l... |
7728444 | Programmatically change the Windows Shell | 15 | 2011-10-11 15:22:33 | <p>I'm working on a project that will be "embedded" into a Windows 7 system, this is going to be achieved by disabling task manager and changing the windows shell to the application, as well as other things.</p>
<p>What I'm looking to do here is programmatically change the Windows shell between the application and exp... | 4,473 | 989,766 | 2014-04-28 01:13:57 | 7,741,917 | 15 | 2011-10-12 14:44:36 | 989,766 | 2011-10-12 15:46:02 | https://stackoverflow.com/q/7728444 | https://stackoverflow.com/a/7741917 | <p>After much searching of other locations on the net, I have finally got the Shell to change to the executable file of the application that is being built.</p>
<p>The "Embedding" process is a three step process, in the case of the software I'm working on, we start by disabling Task Manager, We then set the shell exec... | <p>After much searching of other locations on the net, I have finally got the Shell to change to the executable file of the application that is being built.</p> <p>The "Embedding" process is a three step process, in the case of the software I'm working on, we start by disabling Task Manager, We then set the shell exec... | 9, 64, 263, 390 | c#, registry, shell, windows | <h1>Programmatically change the Windows Shell</h1>
<p>I'm working on a project that will be "embedded" into a Windows 7 system, this is going to be achieved by disabling task manager and changing the windows shell to the application, as well as other things.</p>
<p>What I'm looking to do here is programmatically chang... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,142 | bash | # Programmatically change the Windows Shell
I'm working on a project that will be "embedded" into a Windows 7 system, this is going to be achieved by disabling task manager and changing the windows shell to the application, as well as other things.
What I'm looking to do here is programmatically change the Windows sh... | After much searching of other locations on the net, I have finally got the Shell to change to the executable file of the application that is being built.
The "Embedding" process is a three step process, in the case of the software I'm working on, we start by disabling Task Manager, We then set the shell executable in ... |
3997303 | How to attach a file to an email with PowerShell | 15 | 2010-10-22 13:35:29 | <p>I have written a PowerShell script that will create an email, however I can't seem to attach a file. The file does exist and PowerShell can open it, Could anyone tell me what I'm doing wrong?</p>
<pre><code>$ol = New-Object -comObject Outlook.Application
$message = $ol.CreateItem(0)
$message.Recipients.Add("Deploy... | 146,977 | 409,119 | 2024-06-13 14:37:23 | 4,067,730 | 15 | 2010-11-01 09:24:35 | 409,119 | 2010-11-01 09:55:27 | https://stackoverflow.com/q/3997303 | https://stackoverflow.com/a/4067730 | <p>I got the above to work by removing the line</p>
<pre><code>$attachment = new-object System.Net.Mail.Attachment $file
</code></pre>
<p>and changing </p>
<pre><code>$message.Attachments.Add($attachment)
</code></pre>
<p>to </p>
<pre><code>$message.Attachments.Add($file)
</code></pre>
<p>While the solution provi... | <p>I got the above to work by removing the line</p> <pre><code>$attachment = new-object System.Net.Mail.Attachment $file </code></pre> <p>and changing </p> <pre><code>$message.Attachments.Add($attachment) </code></pre> <p>to </p> <pre><code>$message.Attachments.Add($file) </code></pre> <p>While the solution provi... | 146, 526, 6166, 24067 | attachment, email, powershell, powershell-2.0 | <h1>How to attach a file to an email with PowerShell</h1>
<p>I have written a PowerShell script that will create an email, however I can't seem to attach a file. The file does exist and PowerShell can open it, Could anyone tell me what I'm doing wrong?</p>
<pre><code>$ol = New-Object -comObject Outlook.Application
$m... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,143 | bash | # How to attach a file to an email with PowerShell
I have written a PowerShell script that will create an email, however I can't seem to attach a file. The file does exist and PowerShell can open it, Could anyone tell me what I'm doing wrong?
```
$ol = New-Object -comObject Outlook.Application
$message = $ol.CreateI... | I got the above to work by removing the line
```
$attachment = new-object System.Net.Mail.Attachment $file
```
and changing
```
$message.Attachments.Add($attachment)
```
to
```
$message.Attachments.Add($file)
```
While the solution provided by @Keith Hill would be better, even with a lot of goggling I couldn't ge... |
2524937 | How to send a signal SIGINT from script to script? | 15 | 2010-03-26 16:32:57 | <p>I want to trap a signal send from Script-A.sh to Script-B.sh
so in Script-A.sh i use the command:</p>
<blockquote>
<p>(Send SIGINT to Script-B.sh)<br>
kill -2 $PID_Script-B.sh </p>
</blockquote>
<p>And in Script-B.sh i catch the signal and call function Clean</p>
<blockquote>
<p>trap 'Clean' 2 </p>
</bloc... | 18,747 | 276,285 | 2019-08-09 01:38:21 | 2,527,268 | 15 | 2010-03-26 22:47:44 | 26,428 | 2016-07-19 21:48:51 | https://stackoverflow.com/q/2524937 | https://stackoverflow.com/a/2527268 | <p>I was able to reproduce the behavior you report. My hypothesis is that since the script is running <strong><em>from</em></strong> a non-interactive shell (as a child of a script) that <code>SIGINT</code>, which is a keyboard signal, is ignored.</p>
<p>From <code>info bash</code>:</p>
<blockquote>
<p>Background p... | <p>I was able to reproduce the behavior you report. My hypothesis is that since the script is running <strong><em>from</em></strong> a non-interactive shell (as a child of a script) that <code>SIGINT</code>, which is a keyboard signal, is ignored.</p> <p>From <code>info bash</code>:</p> <blockquote> <p>Background p... | 387, 2481, 5779, 124485 | bash, bash-trap, kill, signals | <h1>How to send a signal SIGINT from script to script?</h1>
<p>I want to trap a signal send from Script-A.sh to Script-B.sh
so in Script-A.sh i use the command:</p>
<blockquote>
<p>(Send SIGINT to Script-B.sh)<br>
kill -2 $PID_Script-B.sh </p>
</blockquote>
<p>And in Script-B.sh i catch the signal and call funct... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,144 | bash | # How to send a signal SIGINT from script to script?
I want to trap a signal send from Script-A.sh to Script-B.sh
so in Script-A.sh i use the command:
> (Send SIGINT to Script-B.sh)
> kill -2 $PID_Script-B.sh
And in Script-B.sh i catch the signal and call function Clean
> trap 'Clean' 2
It does not work, instead... | I was able to reproduce the behavior you report. My hypothesis is that since the script is running ***from*** a non-interactive shell (as a child of a script) that `SIGINT`, which is a keyboard signal, is ignored.
From `info bash`:
> Background processes are those whose process group ID differs from the
> terminal's;... |
1506902 | Why do processes spawned by cron end up defunct? | 15 | 2009-10-01 22:45:18 | <p>I have some processes showing up as <code><defunct></code> in <code>top</code> (and <code>ps</code>). I've boiled things down from the real scripts and programs.</p>
<p>In my <code>crontab</code>:</p>
<pre><code>* * * * * /tmp/launcher.sh /tmp/tester.sh
</code></pre>
<p>The contents of <code>launcher.sh</c... | 32,512 | 4,323 | 2021-02-23 20:49:51 | 1,506,914 | 15 | 2009-10-01 22:48:58 | 140,740 | 2009-10-02 21:48:22 | https://stackoverflow.com/q/1506902 | https://stackoverflow.com/a/1506914 | <p>Because they haven't been the subject of a <code>wait(2)</code> system call.</p>
<p>Since someone may wait for these processes in the future, the kernel can't completely get rid of them or it won't be able to execute the <code>wait</code> system call because it won't have the exit status or evidence of its existenc... | <p>Because they haven't been the subject of a <code>wait(2)</code> system call.</p> <p>Since someone may wait for these processes in the future, the kernel can't completely get rid of them or it won't be able to execute the <code>wait</code> system call because it won't have the exit status or evidence of its existenc... | 387, 601, 2827, 17776, 40425 | background, bash, cron, defunct, zombie-process | <h1>Why do processes spawned by cron end up defunct?</h1>
<p>I have some processes showing up as <code><defunct></code> in <code>top</code> (and <code>ps</code>). I've boiled things down from the real scripts and programs.</p>
<p>In my <code>crontab</code>:</p>
<pre><code>* * * * * /tmp/launcher.sh /tmp/tester... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,145 | bash | # Why do processes spawned by cron end up defunct?
I have some processes showing up as `<defunct>` in `top` (and `ps`). I've boiled things down from the real scripts and programs.
In my `crontab`:
```
* * * * * /tmp/launcher.sh /tmp/tester.sh
```
The contents of `launcher.sh` (which is of course marked executable):... | Because they haven't been the subject of a `wait(2)` system call.
Since someone may wait for these processes in the future, the kernel can't completely get rid of them or it won't be able to execute the `wait` system call because it won't have the exit status or evidence of its existence any more.
When you start one ... |
49818161 | Can't Install ARCore Emulator for Android Studio | 14 | 2018-04-13 13:26:48 | <p>I don't know if I'm allowed to ask this question but I really can't figure out how to use ARCore on Android Emulated Device.
According to the official guide I'm supposed to use API 8.1 on pixel/pixel 2 device in order to run any app which uses ARCore. Sadly those emulator don't come with the support for Play Store, ... | 9,644 | 7,362,273 | 2023-05-11 08:12:41 | 55,567,156 | 15 | 2019-04-08 06:08:29 | 6,599,590 | 2023-05-11 08:12:41 | https://stackoverflow.com/q/49818161 | https://stackoverflow.com/a/55567156 | <p>Updated: <strong>May 11, 2023</strong>.</p>
<p>For using ARCore Emulator, at first, you have to create a virtual device with support for AR. I'm running Android Studio Flamingo on macOS Ventura 13.4.</p>
<p>I created Pixel 6 Pro virtual device:</p>
<p><a href="https://i.sstatic.net/9e9SJ.png" rel="nofollow noreferre... | <p>Updated: <strong>May 11, 2023</strong>.</p> <p>For using ARCore Emulator, at first, you have to create a virtual device with support for AR. I'm running Android Studio Flamingo on macOS Ventura 13.4.</p> <p>I created Pixel 6 Pro virtual device:</p> <p><a href="https://i.sstatic.net/9e9SJ.png" rel="nofollow noreferre... | 387, 30868, 91905, 128295 | android-studio, arcore, augmented-reality, bash | <h1>Can't Install ARCore Emulator for Android Studio</h1>
<p>I don't know if I'm allowed to ask this question but I really can't figure out how to use ARCore on Android Emulated Device.
According to the official guide I'm supposed to use API 8.1 on pixel/pixel 2 device in order to run any app which uses ARCore. Sadly t... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,146 | bash | # Can't Install ARCore Emulator for Android Studio
I don't know if I'm allowed to ask this question but I really can't figure out how to use ARCore on Android Emulated Device.
According to the official guide I'm supposed to use API 8.1 on pixel/pixel 2 device in order to run any app which uses ARCore. Sadly those emul... | Updated: **May 11, 2023**.
For using ARCore Emulator, at first, you have to create a virtual device with support for AR. I'm running Android Studio Flamingo on macOS Ventura 13.4.
I created Pixel 6 Pro virtual device:
[](https://i.sstatic.net/9e9SJ.png)... |
2718744 | PowerShell Advanced Function get current ParameterSetName | 14 | 2010-04-27 04:30:48 | <p>In C# you can get the current <code>ParameterSetName</code> in the <code>ProcessRecord</code> override of a PowerShell <code>Cmdlet</code> with code like this:</p>
<pre><code> switch (ParameterSetName)
{
case FromUriParamSetName:
loadFromUri();
break;
case FromFileParamSetName:
... | 10,673 | 3,957 | 2017-10-28 05:00:16 | 46,940,090 | 15 | 2017-10-25 18:56:44 | 3,625,630 | 2017-10-28 05:00:16 | https://stackoverflow.com/q/2718744 | https://stackoverflow.com/a/46940090 | <p>As a way to expand this awesome answer:</p>
<pre><code>switch ($PsCmdlet.ParameterSetName) {
"FromFile_ParamSet" {
}
"FromUri_ParamSet" {
}
"__AllParameterSets" {
}
}
</code></pre>
<p>The <code>__AllparameterSets</code> is the default option in PS</p>
| <p>As a way to expand this awesome answer:</p> <pre><code>switch ($PsCmdlet.ParameterSetName) { "FromFile_ParamSet" { } "FromUri_ParamSet" { } "__AllParameterSets" { } } </code></pre> <p>The <code>__AllparameterSets</code> is the default option in PS</p> | 526, 153947 | powershell, powershell-cmdlet | <h1>PowerShell Advanced Function get current ParameterSetName</h1>
<p>In C# you can get the current <code>ParameterSetName</code> in the <code>ProcessRecord</code> override of a PowerShell <code>Cmdlet</code> with code like this:</p>
<pre><code> switch (ParameterSetName)
{
case FromUriParamSetName:
l... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,147 | bash | # PowerShell Advanced Function get current ParameterSetName
In C# you can get the current `ParameterSetName` in the `ProcessRecord` override of a PowerShell `Cmdlet` with code like this:
```
switch (ParameterSetName)
{
case FromUriParamSetName:
loadFromUri();
break;
case FromFileP... | As a way to expand this awesome answer:
```
switch ($PsCmdlet.ParameterSetName) {
"FromFile_ParamSet" {
}
"FromUri_ParamSet" {
}
"__AllParameterSets" {
}
}
```
The `__AllparameterSets` is the default option in PS |
43731839 | PowerShell Split after Pipe | 14 | 2017-05-02 06:53:24 | <p>I use the following line in my script to return all the paths of all folders at the <code>$folder</code> location.</p>
<pre><code>dir -recurse $folder|?{$_.PSIsContainer}|select -ExpandProperty FullName
</code></pre>
<p>This works. But: I only need the fourth element of each path.</p>
<p>I've tried adding <code>|... | 23,538 | 2,146,626 | 2017-05-02 06:59:55 | 43,731,879 | 15 | 2017-05-02 06:55:56 | 1,163,423 | 2017-05-02 06:55:56 | https://stackoverflow.com/q/43731839 | https://stackoverflow.com/a/43731879 | <p>You are almost there. You need to put your code within the <code>Foreach-Object</code> cmdlet:</p>
<pre><code>Get-ChildItem -recurse $folder|
Where-Object {$_.PSIsContainer}|
Select-Object -ExpandProperty FullName |
ForEach-Object {
$_.Split("\")[3]
}
</code></pre>
| <p>You are almost there. You need to put your code within the <code>Foreach-Object</code> cmdlet:</p> <pre><code>Get-ChildItem -recurse $folder| Where-Object {$_.PSIsContainer}| Select-Object -ExpandProperty FullName | ForEach-Object { $_.Split("\")[3] } </code></pre> | 526, 2193, 6268 | path, powershell, split | <h1>PowerShell Split after Pipe</h1>
<p>I use the following line in my script to return all the paths of all folders at the <code>$folder</code> location.</p>
<pre><code>dir -recurse $folder|?{$_.PSIsContainer}|select -ExpandProperty FullName
</code></pre>
<p>This works. But: I only need the fourth element of each pa... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,148 | bash | # PowerShell Split after Pipe
I use the following line in my script to return all the paths of all folders at the `$folder` location.
```
dir -recurse $folder|?{$_.PSIsContainer}|select -ExpandProperty FullName
```
This works. But: I only need the fourth element of each path.
I've tried adding `|{$_.Split("\")}[3]}... | You are almost there. You need to put your code within the `Foreach-Object` cmdlet:
```
Get-ChildItem -recurse $folder|
Where-Object {$_.PSIsContainer}|
Select-Object -ExpandProperty FullName |
ForEach-Object {
$_.Split("\")[3]
}
``` |
38354773 | How to pass an ssh key passphrase via environment variable | 14 | 2016-07-13 14:39:03 | <p>I run shell script with <code>ssh</code> command inside my application. Used private key is encrypted by passphrase and the problem is - I cannot interactively pass it when asked.Key is not added in <code>ssh-agent</code>. I cannot execute <code>ssh-add my_key</code> because the passphrase is suppose to be passed in... | 27,406 | 4,261,472 | 2022-02-12 16:20:53 | 38,356,798 | 15 | 2016-07-13 16:11:24 | 1,598,080 | 2016-07-14 08:31:03 | https://stackoverflow.com/q/38354773 | https://stackoverflow.com/a/38356798 | <p>So there are actually a few things that is important for what you are trying to do:</p>
<ol>
<li>DISPLAY must be set</li>
<li>it must not have a terminal associated with it</li>
<li>on some machines it may be necessary to redirect the input from /dev/null (mine is one of them).</li>
<li>SSH_ASKPASS must contain an ... | <p>So there are actually a few things that is important for what you are trying to do:</p> <ol> <li>DISPLAY must be set</li> <li>it must not have a terminal associated with it</li> <li>on some machines it may be necessary to redirect the input from /dev/null (mine is one of them).</li> <li>SSH_ASKPASS must contain an ... | 58, 386, 390, 25308, 58114 | linux, shell, ssh, ssh-agent, ssh-keys | <h1>How to pass an ssh key passphrase via environment variable</h1>
<p>I run shell script with <code>ssh</code> command inside my application. Used private key is encrypted by passphrase and the problem is - I cannot interactively pass it when asked.Key is not added in <code>ssh-agent</code>. I cannot execute <code>ssh... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,149 | bash | # How to pass an ssh key passphrase via environment variable
I run shell script with `ssh` command inside my application. Used private key is encrypted by passphrase and the problem is - I cannot interactively pass it when asked.Key is not added in `ssh-agent`. I cannot execute `ssh-add my_key` because the passphrase ... | So there are actually a few things that is important for what you are trying to do:
1. DISPLAY must be set
2. it must not have a terminal associated with it
3. on some machines it may be necessary to redirect the input from /dev/null (mine is one of them).
4. SSH_ASKPASS must contain an executable which outputs the pa... |
23096884 | How to enumerate a list of files | 14 | 2014-04-16 00:28:27 | <p>I want to get a numbered list of files, e.g. if I have these files:</p>
<pre><code>a.pdf
b.pdf
c
</code></pre>
<p>then it should be listed as:</p>
<pre><code>1 a.pdf
2 b.pdf
3 c
</code></pre>
| 18,236 | null | 2018-03-15 05:23:07 | 23,096,914 | 15 | 2014-04-16 00:31:27 | 3,164,492 | 2014-04-16 07:40:04 | https://stackoverflow.com/q/23096884 | https://stackoverflow.com/a/23096914 | <p>You can do it two ways:-<br>
1st one :-<br>
<code>ls -1 | awk '{print NR,$0}'</code></p>
<p>2nd one:-<br>
<code>ls -1 | cat -n</code><br>
You must prefer 2nd one but choose whatever you like. :-)</p>
| <p>You can do it two ways:-<br> 1st one :-<br> <code>ls -1 | awk '{print NR,$0}'</code></p> <p>2nd one:-<br> <code>ls -1 | cat -n</code><br> You must prefer 2nd one but choose whatever you like. :-)</p> | 387, 990, 10327 | awk, bash, sh | <h1>How to enumerate a list of files</h1>
<p>I want to get a numbered list of files, e.g. if I have these files:</p>
<pre><code>a.pdf
b.pdf
c
</code></pre>
<p>then it should be listed as:</p>
<pre><code>1 a.pdf
2 b.pdf
3 c
</code></pre>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,150 | bash | # How to enumerate a list of files
I want to get a numbered list of files, e.g. if I have these files:
```
a.pdf
b.pdf
c
```
then it should be listed as:
```
1 a.pdf
2 b.pdf
3 c
``` | You can do it two ways:-
1st one :-
`ls -1 | awk '{print NR,$0}'`
2nd one:-
`ls -1 | cat -n`
You must prefer 2nd one but choose whatever you like. :-) |
19352820 | Bash shell...find command...names with wildcards...alias or function | 14 | 2013-10-14 02:50:24 | <p>I've long used the find command for finding files and directories in the current directory and all subdirectories that match a pattern:</p>
<pre><code>find . -name "*.txt" -print
find . -name "Bill*" -print
</code></pre>
<p>But what I'd really like is an alias or function that will properly pass the wildcard. (I ... | 35,031 | 2,877,454 | 2025-08-29 08:47:54 | 19,352,839 | 15 | 2013-10-14 02:52:18 | 20,862 | 2013-10-14 02:52:18 | https://stackoverflow.com/q/19352820 | https://stackoverflow.com/a/19352839 | <p>Unfortunately the wildcards must be quoted or the shell will expand them if possible.</p>
<p>Fortunately there are multiple ways of quoting them.</p>
<pre><code>fn '*.txt'
fn Bill\*
</code></pre>
| <p>Unfortunately the wildcards must be quoted or the shell will expand them if possible.</p> <p>Fortunately there are multiple ways of quoting them.</p> <pre><code>fn '*.txt' fn Bill\* </code></pre> | 387, 1448, 5569, 5997 | alias, bash, function, wildcard | <h1>Bash shell...find command...names with wildcards...alias or function</h1>
<p>I've long used the find command for finding files and directories in the current directory and all subdirectories that match a pattern:</p>
<pre><code>find . -name "*.txt" -print
find . -name "Bill*" -print
</code></pre>
<p>But what I'd ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,151 | bash | # Bash shell...find command...names with wildcards...alias or function
I've long used the find command for finding files and directories in the current directory and all subdirectories that match a pattern:
```
find . -name "*.txt" -print
find . -name "Bill*" -print
```
But what I'd really like is an alias or functi... | Unfortunately the wildcards must be quoted or the shell will expand them if possible.
Fortunately there are multiple ways of quoting them.
```
fn '*.txt'
fn Bill\*
``` |
5833086 | Shell script variable replacing characters | 14 | 2011-04-29 14:02:59 | <p>I have a variable var="abcde$$$$$$$$fff$$gg". I want to replace all $ with space ' ' but the following puts just one space</p>
<pre><code>var=$( echo "$var" | tr '$' ' ')
</code></pre>
<p>How can i replace them all?</p>
| 59,810 | 663,229 | 2016-09-27 09:48:25 | 5,833,204 | 15 | 2011-04-29 14:12:44 | 96,588 | 2011-04-29 14:12:44 | https://stackoverflow.com/q/5833086 | https://stackoverflow.com/a/5833204 | <p>Works for me. You'll need to use single quotes or escape the dollar signs, otherwise they are removed from the double-quoted string:</p>
<pre><code>echo 'abcde$$$$$$$$fff$$gg' | tr '$' ' '
abcde fff gg
echo "abcde\$\$\$\$\$\$\$\$fff\$\$gg" | tr '$' ' '
abcde fff gg
echo abcde\$\$\$\$\$\$\$\$fff\$\... | <p>Works for me. You'll need to use single quotes or escape the dollar signs, otherwise they are removed from the double-quoted string:</p> <pre><code>echo 'abcde$$$$$$$$fff$$gg' | tr '$' ' ' abcde fff gg echo "abcde\$\$\$\$\$\$\$\$fff\$\$gg" | tr '$' ' ' abcde fff gg echo abcde\$\$\$\$\$\$\$\$fff\$\... | 139, 276, 390 | shell, string, variables | <h1>Shell script variable replacing characters</h1>
<p>I have a variable var="abcde$$$$$$$$fff$$gg". I want to replace all $ with space ' ' but the following puts just one space</p>
<pre><code>var=$( echo "$var" | tr '$' ' ')
</code></pre>
<p>How can i replace them all?</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,152 | bash | # Shell script variable replacing characters
I have a variable var="abcde$$$$$$$$fff$$gg". I want to replace all $ with space ' ' but the following puts just one space
```
var=$( echo "$var" | tr '$' ' ')
```
How can i replace them all? | Works for me. You'll need to use single quotes or escape the dollar signs, otherwise they are removed from the double-quoted string:
```
echo 'abcde$$$$$$$$fff$$gg' | tr '$' ' '
abcde fff gg
echo "abcde\$\$\$\$\$\$\$\$fff\$\$gg" | tr '$' ' '
abcde fff gg
echo abcde\$\$\$\$\$\$\$\$fff\$\$gg | tr '$' '... |
5790767 | Remove folder & files from project using NuGet/Powershell | 14 | 2011-04-26 13:03:15 | <p>I am trying to remove the App_Start folder from my project during my NuGet package install. The documentation for NuGet here:</p>
<p><a href="http://nuget.codeplex.com/wikipage?title=Creating%20a%20Package">http://nuget.codeplex.com/wikipage?title=Creating%20a%20Package</a></p>
<p>Says:</p>
<blockquote>
<p>$pro... | 4,596 | 364,683 | 2013-03-15 06:28:54 | 5,808,163 | 15 | 2011-04-27 17:33:24 | 25,124 | 2011-04-28 09:05:18 | https://stackoverflow.com/q/5790767 | https://stackoverflow.com/a/5808163 | <p>Ok, I'm absolutely sure there's a better way than this, but I've never used NuGet or Powershell until today... :/</p>
<p>I just ran this in my Package Manager Console:</p>
<pre><code>$DTE.Solution.Projects | ForEach { $_.ProjectItems | ForEach { if ($_.Name -eq "Controllers") { $_.Remove() } } }
</code></pre>
<p>... | <p>Ok, I'm absolutely sure there's a better way than this, but I've never used NuGet or Powershell until today... :/</p> <p>I just ran this in my Package Manager Console:</p> <pre><code>$DTE.Solution.Projects | ForEach { $_.ProjectItems | ForEach { if ($_.Name -eq "Controllers") { $_.Remove() } } } </code></pre> <p>... | 526, 62770, 62984 | nuget, nuget-package, powershell | <h1>Remove folder & files from project using NuGet/Powershell</h1>
<p>I am trying to remove the App_Start folder from my project during my NuGet package install. The documentation for NuGet here:</p>
<p><a href="http://nuget.codeplex.com/wikipage?title=Creating%20a%20Package">http://nuget.codeplex.com/wikipage?title=C... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,153 | bash | # Remove folder & files from project using NuGet/Powershell
I am trying to remove the App_Start folder from my project during my NuGet package install. The documentation for NuGet here:
<http://nuget.codeplex.com/wikipage?title=Creating%20a%20Package>
Says:
> $project.Object is the equivalent of <http://msdn.micros... | Ok, I'm absolutely sure there's a better way than this, but I've never used NuGet or Powershell until today... :/
I just ran this in my Package Manager Console:
```
$DTE.Solution.Projects | ForEach { $_.ProjectItems | ForEach { if ($_.Name -eq "Controllers") { $_.Remove() } } }
```
It looped through all projects ite... |
5584470 | How to increment a zero padded int in Bash | 14 | 2011-04-07 16:34:41 | <p>I have a set of records to loop. The numbers range from 0000001 to 0089543 that ill call UIDX.</p>
<p>if i try something like:</p>
<pre><code>for ((i=0; i< 0089543; i++)); do
((UIDX++))
done
</code></pre>
<p>counter increments 1, 2, 3, 4 as opposed to the 0000001, 0000002... that i need.</p>
<p>what is th... | 10,123 | 697,208 | 2014-03-25 15:53:05 | 5,584,523 | 15 | 2011-04-07 16:38:48 | 182,693 | 2014-03-25 15:53:05 | https://stackoverflow.com/q/5584470 | https://stackoverflow.com/a/5584523 | <p>Use the <code>printf</code> command to format the numbers with leading zeroes, eg:</p>
<pre><code>for ((i = 0; i < 99; ++i)); do printf -v num '%07d' $i; echo $num; done
</code></pre>
<p>From <code>man bash</code>:</p>
<blockquote>
<p>printf [-v var] format [arguments]<br>
Write the formatted arguments to ... | <p>Use the <code>printf</code> command to format the numbers with leading zeroes, eg:</p> <pre><code>for ((i = 0; i < 99; ++i)); do printf -v num '%07d' $i; echo $num; done </code></pre> <p>From <code>man bash</code>:</p> <blockquote> <p>printf [-v var] format [arguments]<br> Write the formatted arguments to ... | 387 | bash | <h1>How to increment a zero padded int in Bash</h1>
<p>I have a set of records to loop. The numbers range from 0000001 to 0089543 that ill call UIDX.</p>
<p>if i try something like:</p>
<pre><code>for ((i=0; i< 0089543; i++)); do
((UIDX++))
done
</code></pre>
<p>counter increments 1, 2, 3, 4 as opposed to the... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,154 | bash | # How to increment a zero padded int in Bash
I have a set of records to loop. The numbers range from 0000001 to 0089543 that ill call UIDX.
if i try something like:
```
for ((i=0; i< 0089543; i++)); do
((UIDX++))
done
```
counter increments 1, 2, 3, 4 as opposed to the 0000001, 0000002... that i need.
what is ... | Use the `printf` command to format the numbers with leading zeroes, eg:
```
for ((i = 0; i < 99; ++i)); do printf -v num '%07d' $i; echo $num; done
```
From `man bash`:
> printf [-v var] format [arguments]
> Write the formatted arguments to the standard output under the control of the format. The -v option causes ... |
5436899 | how do i start commands in new terminals in BASH script | 14 | 2011-03-25 18:58:51 | <p>my bash script reads in a few variables and then runs airodump on my home network. I would like to keep the window with airodump running and open some new terminals to run other commands for network discovery while the airodump screen is open (so i can see the results).<br>
right now what i have looks like this (ed... | 29,390 | 585,971 | 2011-08-28 14:48:19 | 5,436,995 | 15 | 2011-03-25 19:08:45 | 388,520 | 2011-03-25 19:08:45 | https://stackoverflow.com/q/5436899 | https://stackoverflow.com/a/5436995 | <p>The terminal window is generated by a separate program from the command running inside. Try one of these variations:</p>
<pre><code>xterm -e airomon-start wlan0 "$channel","$channel" &
gnome-terminal -x airomon-start wlan0 "$channel","$channel" &
konsole -e airomon-start wlan0 "$channel","$channel" &... | <p>The terminal window is generated by a separate program from the command running inside. Try one of these variations:</p> <pre><code>xterm -e airomon-start wlan0 "$channel","$channel" & gnome-terminal -x airomon-start wlan0 "$channel","$channel" & konsole -e airomon-start wlan0 "$channel","$channel" &... | 387 | bash | <h1>how do i start commands in new terminals in BASH script</h1>
<p>my bash script reads in a few variables and then runs airodump on my home network. I would like to keep the window with airodump running and open some new terminals to run other commands for network discovery while the airodump screen is open (so i ca... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,155 | bash | # how do i start commands in new terminals in BASH script
my bash script reads in a few variables and then runs airodump on my home network. I would like to keep the window with airodump running and open some new terminals to run other commands for network discovery while the airodump screen is open (so i can see the ... | The terminal window is generated by a separate program from the command running inside. Try one of these variations:
```
xterm -e airomon-start wlan0 "$channel","$channel" &
gnome-terminal -x airomon-start wlan0 "$channel","$channel" &
konsole -e airomon-start wlan0 "$channel","$channel" &
```
Pick the command that... |
61840544 | What is the "done" function/meaning in the bash while loop? | 13 | 2020-05-16 17:04:13 | <p>I am a new guy for bash shell. I am confused by the below script. </p>
<pre><code>#!/bin/bash
input=name.csv
while IFS=',' read -r Family_name First_name
do
echo $Family_name
echo $First_name
done < $input
</code></pre>
<p>Intuitively, I thought the <code>done</code> is some kind of boundary marker that ... | 41,712 | 11,203,583 | 2020-12-15 18:16:54 | 61,840,595 | 15 | 2020-05-16 17:08:04 | 978,917 | 2020-05-16 17:08:04 | https://stackoverflow.com/q/61840544 | https://stackoverflow.com/a/61840595 | <blockquote>
<p>Intuitively, I thought the done is some kind of boundary maker that told you the while field is over.</p>
</blockquote>
<p>Correct; <code>done</code> ends a while-loop (or for-loop or similar).</p>
<blockquote>
<p>Here it show that done can take the data from a variable.</p>
</blockquote>
<p>No; ... | <blockquote> <p>Intuitively, I thought the done is some kind of boundary maker that told you the while field is over.</p> </blockquote> <p>Correct; <code>done</code> ends a while-loop (or for-loop or similar).</p> <blockquote> <p>Here it show that done can take the data from a variable.</p> </blockquote> <p>No; ... | 58, 387 | bash, linux | <h1>What is the "done" function/meaning in the bash while loop?</h1>
<p>I am a new guy for bash shell. I am confused by the below script. </p>
<pre><code>#!/bin/bash
input=name.csv
while IFS=',' read -r Family_name First_name
do
echo $Family_name
echo $First_name
done < $input
</code></pre>
<p>Intuitively, ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,156 | bash | # What is the "done" function/meaning in the bash while loop?
I am a new guy for bash shell. I am confused by the below script.
```
#!/bin/bash
input=name.csv
while IFS=',' read -r Family_name First_name
do
echo $Family_name
echo $First_name
done < $input
```
Intuitively, I thought the `done` is some kind of ... | > Intuitively, I thought the done is some kind of boundary maker that told you the while field is over.
Correct; `done` ends a while-loop (or for-loop or similar).
> Here it show that done can take the data from a variable.
No; the `< $input` (meaning `< name.csv`) is a [redirection](https://www.gnu.org/software/bas... |
59897745 | checking if a string exists in an array of strings in bash | 13 | 2020-01-24 13:47:49 | <p>I know how to compare two string in bash:</p>
<pre><code>if [ "$build_type" = "devite" ]; then
echo "building'"
fi
</code></pre>
<p>But what I need is to check if "$build_type" is in ["devite", "relite"]</p>
<p>so something similar to this:</p>
<pre><code>if [ "$build_type" in ["devite", "relite"] ]; then
ec... | 23,924 | 12,043,259 | 2020-01-24 14:25:11 | 59,897,856 | 15 | 2020-01-24 13:54:17 | 1,126,841 | 2020-01-24 13:54:17 | https://stackoverflow.com/q/59897745 | https://stackoverflow.com/a/59897856 | <p>Join two <code>test</code>/<code>[</code> commands with <code>||</code>:</p>
<pre><code>if [ "$build_type" = devite ] || [ "$build_type" = relite ]; then
echo "building"
fi
</code></pre>
<p>or use a <code>case</code> statement.</p>
<pre><code>case $build_type in
devite|relite) echo "building" ;;
esac
</code><... | <p>Join two <code>test</code>/<code>[</code> commands with <code>||</code>:</p> <pre><code>if [ "$build_type" = devite ] || [ "$build_type" = relite ]; then echo "building" fi </code></pre> <p>or use a <code>case</code> statement.</p> <pre><code>case $build_type in devite|relite) echo "building" ;; esac </code><... | 387 | bash | <h1>checking if a string exists in an array of strings in bash</h1>
<p>I know how to compare two string in bash:</p>
<pre><code>if [ "$build_type" = "devite" ]; then
echo "building'"
fi
</code></pre>
<p>But what I need is to check if "$build_type" is in ["devite", "relite"]</p>
<p>so something similar to this:</p>... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,157 | bash | # checking if a string exists in an array of strings in bash
I know how to compare two string in bash:
```
if [ "$build_type" = "devite" ]; then
echo "building'"
fi
```
But what I need is to check if "$build_type" is in ["devite", "relite"]
so something similar to this:
```
if [ "$build_type" in ["devite", "reli... | Join two `test`/`[` commands with `||`:
```
if [ "$build_type" = devite ] || [ "$build_type" = relite ]; then
echo "building"
fi
```
or use a `case` statement.
```
case $build_type in
devite|relite) echo "building" ;;
esac
```
If the targets are in an associative array, you can check for the existence of a key.... |
56257442 | Trusting self-signed certificate in Invoke-WebRequest call | 13 | 2019-05-22 13:02:05 | <h2>Question</h2>
<p>Is there a way I can call <code>Invoke-WebRequest</code> and for example expect a given public key of the certificate to validate that I trust the connection?</p>
<p>If not, is there another way to invoke the webrequest and only trust the webpage without trusting the issuer or ignoring the certif... | 32,134 | 6,404,133 | 2019-10-21 22:07:49 | 56,260,067 | 15 | 2019-05-22 15:15:55 | 2,150,063 | 2019-05-22 15:15:55 | https://stackoverflow.com/q/56257442 | https://stackoverflow.com/a/56260067 | <p>Short answer, No you can't get around it, and when it comes to certificates, don't even try. The client will first look at the certificate, and the whole certificate chain to see if it is trusted. If any part of that chain (e.g. issuer) is not trusted, then it is not trusted. If this fundamental fact didn't happen, ... | <p>Short answer, No you can't get around it, and when it comes to certificates, don't even try. The client will first look at the certificate, and the whole certificate chain to see if it is trusted. If any part of that chain (e.g. issuer) is not trusted, then it is not trusted. If this fundamental fact didn't happen, ... | 526, 642, 14423, 130616 | https, powershell, powershell-core, ssl-certificate | <h1>Trusting self-signed certificate in Invoke-WebRequest call</h1>
<h2>Question</h2>
<p>Is there a way I can call <code>Invoke-WebRequest</code> and for example expect a given public key of the certificate to validate that I trust the connection?</p>
<p>If not, is there another way to invoke the webrequest and only ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,158 | bash | # Trusting self-signed certificate in Invoke-WebRequest call
## Question
Is there a way I can call `Invoke-WebRequest` and for example expect a given public key of the certificate to validate that I trust the connection?
If not, is there another way to invoke the webrequest and only trust the webpage without trustin... | Short answer, No you can't get around it, and when it comes to certificates, don't even try. The client will first look at the certificate, and the whole certificate chain to see if it is trusted. If any part of that chain (e.g. issuer) is not trusted, then it is not trusted. If this fundamental fact didn't happen, the... |
53126950 | Permission denied to Docker daemon socket at unix:///var/run/docker.sock | 13 | 2018-11-02 23:28:22 | <p>I have this <code>Dockerfile</code>:</p>
<pre><code>FROM chekote/gulp:latest
USER root
RUN apt-get update \
&& apt-get upgrade -y \
&& apt-get install -y sudo libltdl-dev
ARG dockerUser='my-user-name';
ARG group='docker';
# crate group if not exists
RUN if ! grep -q -E "^$group:" /e... | 28,522 | 1,174,405 | 2022-07-11 23:25:12 | 53,129,447 | 15 | 2018-11-03 07:47:09 | 10,008,173 | 2021-07-28 11:34:28 | https://stackoverflow.com/q/53126950 | https://stackoverflow.com/a/53129447 | <p>The permission matching happens only on <em>numeric</em> user ID and group ID. If the socket file is mode 0660 and owned by user ID 0 and group ID 32, and you're calling it as a user with user ID 1000 and group IDs 1000 and 16, it doesn't matter if one <code>/etc/group</code> file names gid 32 as <code>docker</code... | <p>The permission matching happens only on <em>numeric</em> user ID and group ID. If the socket file is mode 0660 and owned by user ID 0 and group ID 32, and you're calling it as a user with user ID 1000 and group IDs 1000 and 16, it doesn't matter if one <code>/etc/group</code> file names gid 32 as <code>docker</code... | 387, 90304, 99715, 108477, 133383 | bash, docker, dockerfile, docker-run, gulp | <h1>Permission denied to Docker daemon socket at unix:///var/run/docker.sock</h1>
<p>I have this <code>Dockerfile</code>:</p>
<pre><code>FROM chekote/gulp:latest
USER root
RUN apt-get update \
&& apt-get upgrade -y \
&& apt-get install -y sudo libltdl-dev
ARG dockerUser='my-user-name';
A... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,159 | bash | # Permission denied to Docker daemon socket at unix:///var/run/docker.sock
I have this `Dockerfile`:
```
FROM chekote/gulp:latest
USER root
RUN apt-get update \
&& apt-get upgrade -y \
&& apt-get install -y sudo libltdl-dev
ARG dockerUser='my-user-name';
ARG group='docker';
# crate group if not exists... | The permission matching happens only on *numeric* user ID and group ID. If the socket file is mode 0660 and owned by user ID 0 and group ID 32, and you're calling it as a user with user ID 1000 and group IDs 1000 and 16, it doesn't matter if one `/etc/group` file names gid 32 as `docker` and the other one names gid 16 ... |
51440450 | Bash operators: "!" vs "-z" | 13 | 2018-07-20 10:25:03 | <p>What is the difference between the operator "!" and "-z" applied to a string?</p>
<pre><code>#Example 1
if [ ! STRING ]; then ...
#Example 2
if [ -z STRING ]; then ...
</code></pre>
<p>Thanks</p>
| 11,262 | 8,018,439 | 2019-03-29 11:16:55 | 51,440,747 | 15 | 2018-07-20 10:41:30 | 8,344,060 | 2019-03-29 11:16:55 | https://stackoverflow.com/q/51440450 | https://stackoverflow.com/a/51440747 | <p>First of all you make use of single brackets. This implies that you are using the <code>test</code> command and not the Bash-builtin function. From the manual :</p>
<blockquote>
<p><strong><code>test EXPRESSION</code></strong> or <strong><code>[ EXPRESSION ]</code>:</strong> this exits with the status returned by <c... | <p>First of all you make use of single brackets. This implies that you are using the <code>test</code> command and not the Bash-builtin function. From the manual :</p> <blockquote> <p><strong><code>test EXPRESSION</code></strong> or <strong><code>[ EXPRESSION ]</code>:</strong> this exits with the status returned by <c... | 387, 7992 | bash, operators | <h1>Bash operators: "!" vs "-z"</h1>
<p>What is the difference between the operator "!" and "-z" applied to a string?</p>
<pre><code>#Example 1
if [ ! STRING ]; then ...
#Example 2
if [ -z STRING ]; then ...
</code></pre>
<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 | 9,160 | bash | # Bash operators: "!" vs "-z"
What is the difference between the operator "!" and "-z" applied to a string?
```
#Example 1
if [ ! STRING ]; then ...
#Example 2
if [ -z STRING ]; then ...
```
Thanks | First of all you make use of single brackets. This implies that you are using the `test` command and not the Bash-builtin function. From the manual :
> **`test EXPRESSION`** or **`[ EXPRESSION ]`:** this exits with the status returned by `EXPRESSION`
>
> **`! EXPRESSION`:** `test` returns **true** of `EXPRESSION` is *... |
34591729 | How to execute code in the Django shell by an external python script? | 13 | 2016-01-04 12:58:13 | <p><strong>What I want to achieve:</strong></p>
<p>I would like to create a python script to deactivate Django users in the database from the CLI. I came up with this:</p>
<pre><code>$ sudo python manage.py shell
>>> user = User.objects.get(username=FooBar)
>>> user.is_active = False
>>> us... | 18,250 | 1,949,628 | 2022-09-01 13:37:14 | 34,591,919 | 15 | 2016-01-04 13:08:16 | 104,349 | 2022-09-01 11:38:44 | https://stackoverflow.com/q/34591729 | https://stackoverflow.com/a/34591919 | <p>Firstly, you should not be accessing your Python shell with <code>sudo</code>. There's no need to be running as root.</p>
<p>Secondly, the way to create a script that runs from the command prompt is to write a custom manage.py script, so you can run <code>./manage.py deactivate_users</code>. Full instructions for do... | <p>Firstly, you should not be accessing your Python shell with <code>sudo</code>. There's no need to be running as root.</p> <p>Secondly, the way to create a script that runs from the command prompt is to write a custom manage.py script, so you can run <code>./manage.py deactivate_users</code>. Full instructions for do... | 16, 58, 243, 390, 50079 | django, linux, manage.py, python, shell | <h1>How to execute code in the Django shell by an external python script?</h1>
<p><strong>What I want to achieve:</strong></p>
<p>I would like to create a python script to deactivate Django users in the database from the CLI. I came up with this:</p>
<pre><code>$ sudo python manage.py shell
>>> user = User.o... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,161 | bash | # How to execute code in the Django shell by an external python script?
**What I want to achieve:**
I would like to create a python script to deactivate Django users in the database from the CLI. I came up with this:
```
$ sudo python manage.py shell
>>> user = User.objects.get(username=FooBar)
>>> user.is_active = ... | Firstly, you should not be accessing your Python shell with `sudo`. There's no need to be running as root.
Secondly, the way to create a script that runs from the command prompt is to write a custom manage.py script, so you can run `./manage.py deactivate_users`. Full instructions for doing that are in [the documentat... |
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