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33732061 | Why docker exec is killing nohup process on exit? | 13 | 2015-11-16 09:29:55 | <p>I have running docker ubuntu container with just a bash script inside. I want to start my application inside that container with docker exec like that:</p>
<pre><code>docker exec -it 0b3fc9dd35f2 ./main.sh
</code></pre>
<p>Inside main script I want to run another application with nohup as this is a long running ap... | 23,325 | 4,193,748 | 2017-09-01 06:58:45 | 34,518,145 | 15 | 2015-12-29 19:57:49 | 3,746,786 | 2015-12-29 19:57:49 | https://stackoverflow.com/q/33732061 | https://stackoverflow.com/a/34518145 | <p>This is not an answer, but I still don't have the required reputation to comment.</p>
<p>I don't know why the nohup doesn't work. But I did a workaround that worked, using your ideas:</p>
<pre><code>docker exec -ti running_container bash -c 'nohup ./main.sh &> output & sleep 1'
</code></pre>
| <p>This is not an answer, but I still don't have the required reputation to comment.</p> <p>I don't know why the nohup doesn't work. But I did a workaround that worked, using your ideas:</p> <pre><code>docker exec -ti running_container bash -c 'nohup ./main.sh &> output & sleep 1' </code></pre> | 387, 18966, 90304 | bash, docker, nohup | <h1>Why docker exec is killing nohup process on exit?</h1>
<p>I have running docker ubuntu container with just a bash script inside. I want to start my application inside that container with docker exec like that:</p>
<pre><code>docker exec -it 0b3fc9dd35f2 ./main.sh
</code></pre>
<p>Inside main script I want to run ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,162 | bash | # Why docker exec is killing nohup process on exit?
I have running docker ubuntu container with just a bash script inside. I want to start my application inside that container with docker exec like that:
```
docker exec -it 0b3fc9dd35f2 ./main.sh
```
Inside main script I want to run another application with nohup as... | This is not an answer, but I still don't have the required reputation to comment.
I don't know why the nohup doesn't work. But I did a workaround that worked, using your ideas:
```
docker exec -ti running_container bash -c 'nohup ./main.sh &> output & sleep 1'
``` |
33255834 | Powershell - Rename filename by removing the last few characters | 13 | 2015-10-21 09:40:54 | <p>I want to remove the last 11 characters of multiple files names. For example
I have these file names:</p>
<pre><code>ABCDE_2015_10_20
HIJKL_2015_10_20
MNOPQ_2015_10_20
RSTUV_2015_10_20
</code></pre>
<p>would like to rename them to </p>
<pre><code>ABCDE
HIJKL
MNOPQ
RSTUV
</code></pre>
<p>I have tried using the fo... | 55,393 | 4,324,265 | 2019-02-21 11:58:54 | 33,256,114 | 15 | 2015-10-21 09:52:38 | 3,115,685 | 2015-10-21 09:57:50 | https://stackoverflow.com/q/33255834 | https://stackoverflow.com/a/33256114 | <p>You're almost there, you just need to tell <code>substring</code> exactly where to start and end:</p>
<pre><code>Get-ChildItem 'E:\Thomson Reuters\Stage' | rename-item -newname { $_.name.substring(0,$_.name.length-11) }
</code></pre>
<p>By passing two integers to <code>substring</code> you give it the StartIndex ... | <p>You're almost there, you just need to tell <code>substring</code> exactly where to start and end:</p> <pre><code>Get-ChildItem 'E:\Thomson Reuters\Stage' | rename-item -newname { $_.name.substring(0,$_.name.length-11) } </code></pre> <p>By passing two integers to <code>substring</code> you give it the StartIndex ... | 526 | powershell | <h1>Powershell - Rename filename by removing the last few characters</h1>
<p>I want to remove the last 11 characters of multiple files names. For example
I have these file names:</p>
<pre><code>ABCDE_2015_10_20
HIJKL_2015_10_20
MNOPQ_2015_10_20
RSTUV_2015_10_20
</code></pre>
<p>would like to rename them to </p>
<pre... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,163 | bash | # Powershell - Rename filename by removing the last few characters
I want to remove the last 11 characters of multiple files names. For example
I have these file names:
```
ABCDE_2015_10_20
HIJKL_2015_10_20
MNOPQ_2015_10_20
RSTUV_2015_10_20
```
would like to rename them to
```
ABCDE
HIJKL
MNOPQ
RSTUV
```
I have tr... | You're almost there, you just need to tell `substring` exactly where to start and end:
```
Get-ChildItem 'E:\Thomson Reuters\Stage' | rename-item -newname { $_.name.substring(0,$_.name.length-11) }
```
By passing two integers to `substring` you give it the StartIndex and Length of the string you want to capture. [See... |
29753126 | Create environment variable with dot in the current environment | 13 | 2015-04-20 16:17:23 | <p>I know that you can create environment variables with the command <code>env</code>.</p>
<p>For example:</p>
<pre><code>env A.B=D bash
</code></pre>
<p>The problem is for env a command is required thus creating a new subprocess.</p>
| 20,274 | 371,342 | 2017-03-05 04:28:54 | 29,753,290 | 15 | 2015-04-20 16:25:54 | 1,566,221 | 2015-04-20 16:25:54 | https://stackoverflow.com/q/29753126 | https://stackoverflow.com/a/29753290 | <p>Bash does not allow environment variables with non-alphanumeric characters in their names (aside from <kbd>_</kbd>). While the environment may contain a line such as <code>A.B=D</code>, there is no requirement that a shell be able to make use of it, and bash will not. Other shells may be more flexible.</p>
<p>Utili... | <p>Bash does not allow environment variables with non-alphanumeric characters in their names (aside from <kbd>_</kbd>). While the environment may contain a line such as <code>A.B=D</code>, there is no requirement that a shell be able to make use of it, and bash will not. Other shells may be more flexible.</p> <p>Utili... | 387 | bash | <h1>Create environment variable with dot in the current environment</h1>
<p>I know that you can create environment variables with the command <code>env</code>.</p>
<p>For example:</p>
<pre><code>env A.B=D bash
</code></pre>
<p>The problem is for env a command is required thus creating a new subprocess.</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,164 | bash | # Create environment variable with dot in the current environment
I know that you can create environment variables with the command `env`.
For example:
```
env A.B=D bash
```
The problem is for env a command is required thus creating a new subprocess. | Bash does not allow environment variables with non-alphanumeric characters in their names (aside from `_`). While the environment may contain a line such as `A.B=D`, there is no requirement that a shell be able to make use of it, and bash will not. Other shells may be more flexible.
Utilities which make use of oddly-n... |
29401283 | git credential.helper does not store username password | 13 | 2015-04-01 21:35:56 | <p>I am writing a deployment script which clones a git repo and then performs other tasks such as fetch etc .I have run this </p>
<pre><code>git config --global credential.helper cache
</code></pre>
<p>The username and password for cloning step are provided by an expect script.
But these details are not cached as it ... | 18,707 | 4,381,216 | 2023-10-03 22:38:23 | 29,404,057 | 15 | 2015-04-02 02:28:40 | 1,002,260 | 2021-03-04 17:11:57 | https://stackoverflow.com/q/29401283 | https://stackoverflow.com/a/29404057 | <p>You can create a file <code>~/.netrc</code> like this:</p>
<pre><code>machine github.com
login <username>
password <password>
</code></pre>
<p>and Git will use it. Another option is <a href="//git-scm.com/docs/git-credential-store" rel="noreferrer">git-credential-store</a>:</p>
<pre><code>git config --gl... | <p>You can create a file <code>~/.netrc</code> like this:</p> <pre><code>machine github.com login <username> password <password> </code></pre> <p>and Git will use it. Another option is <a href="//git-scm.com/docs/git-credential-store" rel="noreferrer">git-credential-store</a>:</p> <pre><code>git config --gl... | 119, 387, 9048, 116537 | azure-devops, bash, expect, git | <h1>git credential.helper does not store username password</h1>
<p>I am writing a deployment script which clones a git repo and then performs other tasks such as fetch etc .I have run this </p>
<pre><code>git config --global credential.helper cache
</code></pre>
<p>The username and password for cloning step are provi... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,165 | bash | # git credential.helper does not store username password
I am writing a deployment script which clones a git repo and then performs other tasks such as fetch etc .I have run this
```
git config --global credential.helper cache
```
The username and password for cloning step are provided by an expect script.
But these... | You can create a file `~/.netrc` like this:
```
machine github.com
login <username>
password <password>
```
and Git will use it. Another option is [git-credential-store](//git-scm.com/docs/git-credential-store):
```
git config --global credential.helper store
```
Credentials are saved to `~/.git-credentials`. |
28279812 | BASH : Difference between '-' and '--' options | 13 | 2015-02-02 14:21:30 | <p>I was working my way through a primer on <strong>Shell (Bash) Scripting</strong> and had the following doubt :</p>
<blockquote>
<ul>
<li><p>I came across the <strong><code>ls</code></strong> command</p>
</li>
<li><p>The <strong><code>man</code></strong> page of <strong><code>ls</code></strong> lists a few use cases ... | 10,578 | 4,382,274 | 2015-02-04 17:27:08 | 28,279,911 | 15 | 2015-02-02 14:26:19 | 14,122 | 2015-02-02 14:34:46 | https://stackoverflow.com/q/28279812 | https://stackoverflow.com/a/28279911 | <p>Long-form (<code>--foo</code>) options are a GNU extension -- something present in GNU <code>ls</code>, but not present at all in the POSIX standard setting requirements for UNIX tools, so other versions of <code>ls</code> are not obliged to support these options. The entire word (<code>foo</code>) is meaningful in ... | <p>Long-form (<code>--foo</code>) options are a GNU extension -- something present in GNU <code>ls</code>, but not present at all in the POSIX standard setting requirements for UNIX tools, so other versions of <code>ls</code> are not obliged to support these options. The entire word (<code>foo</code>) is meaningful in ... | 58, 387, 390, 3589, 10327 | bash, linux, ls, sh, shell | <h1>BASH : Difference between '-' and '--' options</h1>
<p>I was working my way through a primer on <strong>Shell (Bash) Scripting</strong> and had the following doubt :</p>
<blockquote>
<ul>
<li><p>I came across the <strong><code>ls</code></strong> command</p>
</li>
<li><p>The <strong><code>man</code></strong> page of... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,166 | bash | # BASH : Difference between '-' and '--' options
I was working my way through a primer on **Shell (Bash) Scripting** and had the following doubt :
> - I came across the **`ls`** command
> - The **`man`** page of **`ls`** lists a few use cases as :
>
> **`ls -a`**
> **`ls --block-size='M'`**
***My Question :***
... | Long-form (`--foo`) options are a GNU extension -- something present in GNU `ls`, but not present at all in the POSIX standard setting requirements for UNIX tools, so other versions of `ls` are not obliged to support these options. The entire word (`foo`) is meaningful in this case. This nomenclature was added more rec... |
20135054 | How do I run many SSH remote commands, on multiple machines, in batch? | 13 | 2013-11-22 01:05:24 | <p>I use SSH to run some commands on multiple remote machines in a <code>for</code> loop. It executes the same command(s) for a list of IP addresses. Some of the IP addresses might be unreachable, so I used the <code>ConnectTimeout</code> option.</p>
<p>However, my script didn't work the way I wanted. Actually it got ... | 35,226 | 2,103,312 | 2018-07-10 05:33:07 | 23,326,958 | 15 | 2014-04-27 17:59:12 | 3,566,933 | 2014-04-28 05:13:06 | https://stackoverflow.com/q/20135054 | https://stackoverflow.com/a/23326958 | <p>Your use of <code>ConnectTimeout</code> is correct, so it is not obvious why it only times out after 30 or more seconds.</p>
<p>Here's how I would change your script to avoid the timeout problem entirely:</p>
<ul>
<li>Use GNU <code>parallel</code> to connect to more than one destination host at the same time.</li>... | <p>Your use of <code>ConnectTimeout</code> is correct, so it is not obvious why it only times out after 30 or more seconds.</p> <p>Here's how I would change your script to avoid the timeout problem entirely:</p> <ul> <li>Use GNU <code>parallel</code> to connect to more than one destination host at the same time.</li>... | 386, 390, 2531, 2702 | for-loop, shell, ssh, timeout | <h1>How do I run many SSH remote commands, on multiple machines, in batch?</h1>
<p>I use SSH to run some commands on multiple remote machines in a <code>for</code> loop. It executes the same command(s) for a list of IP addresses. Some of the IP addresses might be unreachable, so I used the <code>ConnectTimeout</code> o... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,167 | bash | # How do I run many SSH remote commands, on multiple machines, in batch?
I use SSH to run some commands on multiple remote machines in a `for` loop. It executes the same command(s) for a list of IP addresses. Some of the IP addresses might be unreachable, so I used the `ConnectTimeout` option.
However, my script didn... | Your use of `ConnectTimeout` is correct, so it is not obvious why it only times out after 30 or more seconds.
Here's how I would change your script to avoid the timeout problem entirely:
- Use GNU `parallel` to connect to more than one destination host at the same time.
- Use the `-f` option to SSH to process it in t... |
22537163 | Run curl command on each line of a file and fetch data from result | 13 | 2014-03-20 15:08:29 | <p>Suppose I have a file containing a list of links of webpages.</p>
<pre><code>www.xyz.com/asdd
www.wer.com/asdas
www.asdas.com/asd
www.asd.com/asdas
</code></pre>
<p>I know that doing <code>curl www.xyz.com/asdd</code> will fetch me the html of that webpage. I want to fetch some data from that webpage.</p>
<p>So t... | 21,832 | 2,542,215 | 2018-09-10 22:21:23 | 22,538,035 | 15 | 2014-03-20 15:41:35 | 1,983,854 | 2016-12-02 10:07:53 | https://stackoverflow.com/q/22537163 | https://stackoverflow.com/a/22538035 | <p>As indicated in the comments, this will loop through <code>your_file</code> and <code>curl</code> each line:</p>
<pre><code>while IFS= read -r line
do
curl "$line"
done < your_file
</code></pre>
<p>To get the <code><title></code> of a page, you can <code>grep</code> something like this:</p>
<pre><code... | <p>As indicated in the comments, this will loop through <code>your_file</code> and <code>curl</code> each line:</p> <pre><code>while IFS= read -r line do curl "$line" done < your_file </code></pre> <p>To get the <code><title></code> of a page, you can <code>grep</code> something like this:</p> <pre><code... | 18, 387, 990, 1554 | awk, bash, curl, regex | <h1>Run curl command on each line of a file and fetch data from result</h1>
<p>Suppose I have a file containing a list of links of webpages.</p>
<pre><code>www.xyz.com/asdd
www.wer.com/asdas
www.asdas.com/asd
www.asd.com/asdas
</code></pre>
<p>I know that doing <code>curl www.xyz.com/asdd</code> will fetch me the htm... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,168 | bash | # Run curl command on each line of a file and fetch data from result
Suppose I have a file containing a list of links of webpages.
```
www.xyz.com/asdd
www.wer.com/asdas
www.asdas.com/asd
www.asd.com/asdas
```
I know that doing `curl www.xyz.com/asdd` will fetch me the html of that webpage. I want to fetch some data... | As indicated in the comments, this will loop through `your_file` and `curl` each line:
```
while IFS= read -r line
do
curl "$line"
done < your_file
```
To get the `<title>` of a page, you can `grep` something like this:
```
grep -iPo '(?<=<title>).*(?=</title>)' file
```
So all together you could do
```
while I... |
21794235 | How do I deal with vim's swap file system? | 13 | 2014-02-15 06:31:23 | <p>When using <code>vim</code> in ubuntu, I accidentally pressed <code>ctrl-z</code> which suspended my session of <code>vim</code>. I was editing a file (I'll call it <code>test</code>) which was not saved.</p>
<p>When I opened the file again in <code>vim</code>, I got the swap file error:</p>
<pre><code>E325: ATTEN... | 36,179 | 2,029,568 | 2015-01-26 11:08:37 | 21,794,557 | 15 | 2014-02-15 07:10:51 | 3,312,752 | 2014-02-15 07:10:51 | https://stackoverflow.com/q/21794235 | https://stackoverflow.com/a/21794557 | <p>This is not related to Ubuntu alone, since what happens is a base mechanism of
nearly every Unix OS.
By pressin ^Z you ave suspended (not ended) the currently running vim session. The vim
session is still there and waiting for a signal to put it to foreground again.</p>
<p>To reactivate the session:
If vim was sta... | <p>This is not related to Ubuntu alone, since what happens is a base mechanism of nearly every Unix OS. By pressin ^Z you ave suspended (not ended) the currently running vim session. The vim session is still there and waiting for a signal to put it to foreground again.</p> <p>To reactivate the session: If vim was sta... | 34, 58, 370, 387, 391 | bash, linux, terminal, unix, vim | <h1>How do I deal with vim's swap file system?</h1>
<p>When using <code>vim</code> in ubuntu, I accidentally pressed <code>ctrl-z</code> which suspended my session of <code>vim</code>. I was editing a file (I'll call it <code>test</code>) which was not saved.</p>
<p>When I opened the file again in <code>vim</code>, I ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,169 | bash | # How do I deal with vim's swap file system?
When using `vim` in ubuntu, I accidentally pressed `ctrl-z` which suspended my session of `vim`. I was editing a file (I'll call it `test`) which was not saved.
When I opened the file again in `vim`, I got the swap file error:
```
E325: ATTENTION
Found a swap file by the ... | This is not related to Ubuntu alone, since what happens is a base mechanism of
nearly every Unix OS.
By pressin ^Z you ave suspended (not ended) the currently running vim session. The vim
session is still there and waiting for a signal to put it to foreground again.
To reactivate the session:
If vim was started direct... |
21590719 | Check if user is a member of the local admins group on a remote server | 13 | 2014-02-05 23:17:24 | <p>The user is a member of the AD security group "Domain\Sql Admins", and the security group "Domain\Sql Admins" is a member of the local <strong>Administrators</strong> group on a Windows Server.</p>
<p>I have tried the following PowerShell script:</p>
<pre><code> $u = "Username"; net localgroup administrators | Whe... | 56,571 | 1,645,218 | 2017-10-12 04:14:54 | 21,591,740 | 15 | 2014-02-06 00:39:50 | null | 2014-02-06 00:39:50 | https://stackoverflow.com/q/21590719 | https://stackoverflow.com/a/21591740 | <p>Check out this article, by Boe Prox on the Microsoft Hey Scripting Guy blog. He describes how to check if the user is a local administrator or not.</p>
<p><a href="http://blogs.technet.com/b/heyscriptingguy/archive/2011/05/11/check-for-admin-credentials-in-a-powershell-script.aspx" rel="noreferrer">http://blogs.tec... | <p>Check out this article, by Boe Prox on the Microsoft Hey Scripting Guy blog. He describes how to check if the user is a local administrator or not.</p> <p><a href="http://blogs.technet.com/b/heyscriptingguy/archive/2011/05/11/check-for-admin-credentials-in-a-powershell-script.aspx" rel="noreferrer">http://blogs.tec... | 526, 10401 | active-directory, powershell | <h1>Check if user is a member of the local admins group on a remote server</h1>
<p>The user is a member of the AD security group "Domain\Sql Admins", and the security group "Domain\Sql Admins" is a member of the local <strong>Administrators</strong> group on a Windows Server.</p>
<p>I have tried the following PowerShe... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,170 | bash | # Check if user is a member of the local admins group on a remote server
The user is a member of the AD security group "Domain\Sql Admins", and the security group "Domain\Sql Admins" is a member of the local **Administrators** group on a Windows Server.
I have tried the following PowerShell script:
```
$u = "Userna... | Check out this article, by Boe Prox on the Microsoft Hey Scripting Guy blog. He describes how to check if the user is a local administrator or not.
<http://blogs.technet.com/b/heyscriptingguy/archive/2011/05/11/check-for-admin-credentials-in-a-powershell-script.aspx>
This article points to a `Test-IsAdmin` function t... |
21106465 | Restoring stdout and stderr to default value | 13 | 2014-01-14 05:09:50 | <p>In shell script, We can change the default input to a File using the exec command as follow :</p>
<pre><code> exec 1>outputfile
</code></pre>
<p>However, if in the same script if I want to restore the stdout descriptor '1' to the default (terminal). How can we achieve that? </p>
| 8,885 | 1,773,248 | 2019-11-20 06:58:50 | 21,106,592 | 15 | 2014-01-14 05:23:09 | 554,807 | 2019-11-20 06:58:50 | https://stackoverflow.com/q/21106465 | https://stackoverflow.com/a/21106592 | <p>This example</p>
<blockquote>
<p>Example 20-2. Redirecting stdout using exec</p>
<pre><code>#!/bin/bash
# reassign-stdout.sh
LOGFILE=logfile.txt
exec 6>&1 # Link file descriptor #6 with stdout.
# Saves stdout.
exec > $LOGFILE # stdout replaced with file "logfile.txt... | <p>This example</p> <blockquote> <p>Example 20-2. Redirecting stdout using exec</p> <pre><code>#!/bin/bash # reassign-stdout.sh LOGFILE=logfile.txt exec 6>&1 # Link file descriptor #6 with stdout. # Saves stdout. exec > $LOGFILE # stdout replaced with file "logfile.txt... | 58, 390, 4867, 7932, 31901 | exec, http-redirect, linux, shell, stdout | <h1>Restoring stdout and stderr to default value</h1>
<p>In shell script, We can change the default input to a File using the exec command as follow :</p>
<pre><code> exec 1>outputfile
</code></pre>
<p>However, if in the same script if I want to restore the stdout descriptor '1' to the default (terminal). How ca... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,171 | bash | # Restoring stdout and stderr to default value
In shell script, We can change the default input to a File using the exec command as follow :
```
exec 1>outputfile
```
However, if in the same script if I want to restore the stdout descriptor '1' to the default (terminal). How can we achieve that? | This example
> Example 20-2. Redirecting stdout using exec
>
> ```
> #!/bin/bash
> # reassign-stdout.sh
>
> LOGFILE=logfile.txt
>
> exec 6>&1 # Link file descriptor #6 with stdout.
> # Saves stdout.
>
> exec > $LOGFILE # stdout replaced with file "logfile.txt".
>
> # -----------------... |
18279540 | How to kill all background processes in bash when main process exits | 13 | 2013-08-16 18:05:00 | <p>I have a bash that runs endless commands as background processes:</p>
<pre><code>#!/bin/bash
function xyz() {
# some awk command
}
endlesscommand "param 1" | xyz & # async
pids=$!
endlesscommand "param 2" | xyz & # async
pids="$pids "$!
endlesscommand "param 3" | xyz # sync so the script doesn't le... | 7,514 | 1,511,914 | 2023-05-23 15:19:46 | 18,280,221 | 15 | 2013-08-16 18:52:45 | 580,412 | 2016-10-24 21:38:04 | https://stackoverflow.com/q/18279540 | https://stackoverflow.com/a/18280221 | <p>Here's a trap that doesn't need you to track <code>pids</code>:</p>
<pre><code>trap 'jobs -p | xargs kill' EXIT
</code></pre>
<p><strong>EDIT</strong>: @Barmar asked if this works within non-sourced scripts, where job control isn't usually available. It does. Consider this script:</p>
<pre><code>$ cat no-job-co... | <p>Here's a trap that doesn't need you to track <code>pids</code>:</p> <pre><code>trap 'jobs -p | xargs kill' EXIT </code></pre> <p><strong>EDIT</strong>: @Barmar asked if this works within non-sourced scripts, where job control isn't usually available. It does. Consider this script:</p> <pre><code>$ cat no-job-co... | 387, 5910 | bash, process | <h1>How to kill all background processes in bash when main process exits</h1>
<p>I have a bash that runs endless commands as background processes:</p>
<pre><code>#!/bin/bash
function xyz() {
# some awk command
}
endlesscommand "param 1" | xyz & # async
pids=$!
endlesscommand "param 2" | xyz & # async
pid... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,172 | bash | # How to kill all background processes in bash when main process exits
I have a bash that runs endless commands as background processes:
```
#!/bin/bash
function xyz() {
# some awk command
}
endlesscommand "param 1" | xyz & # async
pids=$!
endlesscommand "param 2" | xyz & # async
pids="$pids "$!
endlesscommand ... | Here's a trap that doesn't need you to track `pids`:
```
trap 'jobs -p | xargs kill' EXIT
```
**EDIT**: @Barmar asked if this works within non-sourced scripts, where job control isn't usually available. It does. Consider this script:
```
$ cat no-job-control
#! /bin/bash
set -e -o pipefail
# Prove job control is o... |
16165063 | What is the meaning of !#:3? | 13 | 2013-04-23 08:54:38 | <pre><code> curl http://beyondgrep.com/ack-2.02-single-file > ~/bin/ack && chmod 0755 !#:3
</code></pre>
<p>What is the meaning of <code>!#:3</code>, from <a href="http://beyondgrep.com/install/">ack installation guide</a>?</p>
| 591 | 88,597 | 2013-04-23 12:08:01 | 16,165,187 | 15 | 2013-04-23 08:59:55 | 2,195,474 | 2013-04-23 09:41:25 | https://stackoverflow.com/q/16165063 | https://stackoverflow.com/a/16165187 | <p>In bash or zsh <code>!</code> denotes a history command (not a shebang line which is <code>#!</code>, and has nothing to do with bash or zsh as such).</p>
<p><code>!#</code> means the entire command line typed so far, and <code>:3</code> selects the third word, in this case <code>~/bin/ack</code>.</p>
<p>So the c... | <p>In bash or zsh <code>!</code> denotes a history command (not a shebang line which is <code>#!</code>, and has nothing to do with bash or zsh as such).</p> <p><code>!#</code> means the entire command line typed so far, and <code>:3</code> selects the third word, in this case <code>~/bin/ack</code>.</p> <p>So the c... | 58, 387, 390, 3791, 26784 | ack, bash, linux, shell, zsh | <h1>What is the meaning of !#:3?</h1>
<pre><code> curl http://beyondgrep.com/ack-2.02-single-file > ~/bin/ack && chmod 0755 !#:3
</code></pre>
<p>What is the meaning of <code>!#:3</code>, from <a href="http://beyondgrep.com/install/">ack installation guide</a>?</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,173 | bash | # What is the meaning of !#:3?
```
curl http://beyondgrep.com/ack-2.02-single-file > ~/bin/ack && chmod 0755 !#:3
```
What is the meaning of `!#:3`, from [ack installation guide](http://beyondgrep.com/install/)? | In bash or zsh `!` denotes a history command (not a shebang line which is `#!`, and has nothing to do with bash or zsh as such).
`!#` means the entire command line typed so far, and `:3` selects the third word, in this case `~/bin/ack`.
So the command is equivalent to:
```
curl http://beyondgrep.com/ack-2.02-single... |
15257130 | simple tmux bash script not working | 13 | 2013-03-06 20:16:59 | <p>I want tmux to open a new window and then cd into a directory, but it doesn't work. It just opens tmux in the directory my script was run from (ie. it doesn't execute the cd command).</p>
<p>Can someone tell me what I'm doing wrong? (I'm using tmux 1.6)</p>
<pre><code>#!/bin/bash ... | 7,939 | 598,093 | 2013-03-07 01:05:24 | 15,261,246 | 15 | 2013-03-07 01:05:24 | 598,093 | 2013-03-07 01:05:24 | https://stackoverflow.com/q/15257130 | https://stackoverflow.com/a/15261246 | <p>I finally got it to work, using C-m and numbering the windows starting from 0. I added a second command for illustrative purposes.</p>
<pre><code>#!/bin/bash
tmux start-server
tmux new-sessio... | <p>I finally got it to work, using C-m and numbering the windows starting from 0. I added a second command for illustrative purposes.</p> <pre><code>#!/bin/bash tmux start-server tmux new-sessio... | 387, 60238 | bash, tmux | <h1>simple tmux bash script not working</h1>
<p>I want tmux to open a new window and then cd into a directory, but it doesn't work. It just opens tmux in the directory my script was run from (ie. it doesn't execute the cd command).</p>
<p>Can someone tell me what I'm doing wrong? (I'm using tmux 1.6)</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 | 9,174 | bash | # simple tmux bash script not working
I want tmux to open a new window and then cd into a directory, but it doesn't work. It just opens tmux in the directory my script was run from (ie. it doesn't execute the cd command).
Can someone tell me what I'm doing wrong? (I'm using tmux 1.6)
```
#!/bin/bash ... | I finally got it to work, using C-m and numbering the windows starting from 0. I added a second command for illustrative purposes.
```
#!/bin/bash
tmux start-server
tmux new-session -d -s my_ser... |
15101343 | standard deviation of an arbitrary number of numbers using bc or other standard utilities | 13 | 2013-02-26 23:16:01 | <p>Is there some trick that would allow one to use bc (or some other standard utility) to return the standard deviation of an arbitrary number of numbers? For convenience, let's say that the numbers are stored in a Bash variable in the following way:</p>
<pre><code>myNumbers="0.556
1.456
45.111
7.812
5.001"
</code></p... | 10,732 | 1,556,092 | 2022-08-01 23:02:36 | 15,101,429 | 15 | 2013-02-26 23:22:24 | 465,183 | 2013-02-26 23:57:55 | https://stackoverflow.com/q/15101343 | https://stackoverflow.com/a/15101429 | <p>Using <a href="/questions/tagged/awk" class="post-tag" title="show questions tagged 'awk'" rel="tag">awk</a>:</p>
<pre><code>standardDeviation=$(
echo "$myNumbers" |
awk '{sum+=$1; sumsq+=$1*$1}END{print sqrt(sumsq/NR - (sum/NR)**2)}'
)
echo $standardDeviation
</code></pre>
<p>Using <a href="/questions... | <p>Using <a href="/questions/tagged/awk" class="post-tag" title="show questions tagged 'awk'" rel="tag">awk</a>:</p> <pre><code>standardDeviation=$( echo "$myNumbers" | awk '{sum+=$1; sumsq+=$1*$1}END{print sqrt(sumsq/NR - (sum/NR)**2)}' ) echo $standardDeviation </code></pre> <p>Using <a href="/questions... | 276, 387, 49880 | bash, standard-deviation, variables | <h1>standard deviation of an arbitrary number of numbers using bc or other standard utilities</h1>
<p>Is there some trick that would allow one to use bc (or some other standard utility) to return the standard deviation of an arbitrary number of numbers? For convenience, let's say that the numbers are stored in a Bash v... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,175 | bash | # standard deviation of an arbitrary number of numbers using bc or other standard utilities
Is there some trick that would allow one to use bc (or some other standard utility) to return the standard deviation of an arbitrary number of numbers? For convenience, let's say that the numbers are stored in a Bash variable i... | Using [awk](/questions/tagged/awk "show questions tagged 'awk'"):
```
standardDeviation=$(
echo "$myNumbers" |
awk '{sum+=$1; sumsq+=$1*$1}END{print sqrt(sumsq/NR - (sum/NR)**2)}'
)
echo $standardDeviation
```
Using [perl](/questions/tagged/perl "show questions tagged 'perl'") :
```
#!/usr/bin/env perl
... |
14231232 | Why a variable assignment replaces tabs with spaces | 13 | 2013-01-09 08:42:05 | <p>Why does a variable assignment replace tabs with spaces in the shell?</p>
<pre><code>$ cat tmp
a b e c d
$ res=$(cat tmp)
$ echo $res
a b e c d
</code></pre>
| 6,224 | 878,228 | 2016-05-13 21:57:35 | 14,231,342 | 15 | 2013-01-09 08:49:20 | 1,066,031 | 2016-05-13 21:57:35 | https://stackoverflow.com/q/14231232 | https://stackoverflow.com/a/14231342 | <p>You need to quote your variable <code>$res</code> for whitespace to be preserved. </p>
<pre><code>$ cat file
a b e c d
$ res=$(cat file)
$ echo $res
a b e c d
$ echo "$res"
a b e c d
</code></pre>
<p>From <code>man bash</code> under <code>QUOTING</code>:</p>
<blockquote>
<p>Qu... | <p>You need to quote your variable <code>$res</code> for whitespace to be preserved. </p> <pre><code>$ cat file a b e c d $ res=$(cat file) $ echo $res a b e c d $ echo "$res" a b e c d </code></pre> <p>From <code>man bash</code> under <code>QUOTING</code>:</p> <blockquote> <p>Qu... | 276, 387, 390 | bash, shell, variables | <h1>Why a variable assignment replaces tabs with spaces</h1>
<p>Why does a variable assignment replace tabs with spaces in the shell?</p>
<pre><code>$ cat tmp
a b e c d
$ res=$(cat tmp)
$ echo $res
a b e c d
</code></pre>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,176 | bash | # Why a variable assignment replaces tabs with spaces
Why does a variable assignment replace tabs with spaces in the shell?
```
$ cat tmp
a b e c d
$ res=$(cat tmp)
$ echo $res
a b e c d
``` | You need to quote your variable `$res` for whitespace to be preserved.
```
$ cat file
a b e c d
$ res=$(cat file)
$ echo $res
a b e c d
$ echo "$res"
a b e c d
```
From `man bash` under `QUOTING`:
> Quoting is used to remove the special meaning of certain characters
> or words to t... |
10821597 | How to kill Django runserver sub processes from a bash script? | 13 | 2012-05-30 17:51:35 | <p>I'm working on a Django website where I have various compilation programs that need to run (Compass/Sass, coffeescript, hamlpy), so I made this shell script for convenience:</p>
<pre><code>#!/bin/bash
SITE=/home/dev/sites/rmx
echo "RMX using siteroot=$SITE"
$SITE/rmx/manage.py runserver &
PIDS[0]=$!
compass wa... | 4,226 | 179,609 | 2018-03-02 10:40:46 | 10,821,880 | 15 | 2012-05-30 18:11:28 | 179,609 | 2012-05-30 18:11:28 | https://stackoverflow.com/q/10821597 | https://stackoverflow.com/a/10821880 | <p><strong>SOLVED</strong> </p>
<p>Thanks to <a href="https://stackoverflow.com/questions/392022/best-way-to-kill-all-child-processes">this SO question</a>, I've changed my script to this:</p>
<pre><code>#!/bin/bash
SITE=/home/dev/sites/rmx
echo "RMX using siteroot=$SITE"
$SITE/rmx/manage.py runserver &
compass ... | <p><strong>SOLVED</strong> </p> <p>Thanks to <a href="https://stackoverflow.com/questions/392022/best-way-to-kill-all-child-processes">this SO question</a>, I've changed my script to this:</p> <pre><code>#!/bin/bash SITE=/home/dev/sites/rmx echo "RMX using siteroot=$SITE" $SITE/rmx/manage.py runserver & compass ... | 16, 243, 387, 390 | bash, django, python, shell | <h1>How to kill Django runserver sub processes from a bash script?</h1>
<p>I'm working on a Django website where I have various compilation programs that need to run (Compass/Sass, coffeescript, hamlpy), so I made this shell script for convenience:</p>
<pre><code>#!/bin/bash
SITE=/home/dev/sites/rmx
echo "RMX using s... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,177 | bash | # How to kill Django runserver sub processes from a bash script?
I'm working on a Django website where I have various compilation programs that need to run (Compass/Sass, coffeescript, hamlpy), so I made this shell script for convenience:
```
#!/bin/bash
SITE=/home/dev/sites/rmx
echo "RMX using siteroot=$SITE"
$SITE... | **SOLVED**
Thanks to [this SO question](https://stackoverflow.com/questions/392022/best-way-to-kill-all-child-processes), I've changed my script to this:
```
#!/bin/bash
SITE=/home/dev/sites/rmx
echo "RMX using siteroot=$SITE"
$SITE/rmx/manage.py runserver &
compass watch $SITE/media/compass/ &
coffee -o $SITE/media... |
10747479 | CreateProcess and ShellExecute differences | 13 | 2012-05-25 01:42:41 | <p>What are the main differences between the two? I'm willing to run only another EXE from my (C++) application. Are there any differences when inheriting environments, security features etc?</p>
| 19,700 | 840,405 | 2018-02-01 10:02:23 | 10,751,551 | 15 | 2012-05-25 09:08:06 | 315,935 | 2016-12-31 13:01:44 | https://stackoverflow.com/q/10747479 | https://stackoverflow.com/a/10751551 | <p>The main difference between <code>CreateProcess</code> and <code>ShellExecute</code> is the following: <code>CreateProcess</code> is more oriented on low level and <code>ShellExec</code> on the high user lever which see the user in explorer.</p>
<p>For example using of <code>CreateProcess</code> one can use command... | <p>The main difference between <code>CreateProcess</code> and <code>ShellExecute</code> is the following: <code>CreateProcess</code> is more oriented on low level and <code>ShellExec</code> on the high user lever which see the user in explorer.</p> <p>For example using of <code>CreateProcess</code> one can use command... | 10, 64, 889, 6613, 8646 | c++, createprocess, shell-exec, winapi, windows | <h1>CreateProcess and ShellExecute differences</h1>
<p>What are the main differences between the two? I'm willing to run only another EXE from my (C++) application. Are there any differences when inheriting environments, security features etc?</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,178 | bash | # CreateProcess and ShellExecute differences
What are the main differences between the two? I'm willing to run only another EXE from my (C++) application. Are there any differences when inheriting environments, security features etc? | The main difference between `CreateProcess` and `ShellExecute` is the following: `CreateProcess` is more oriented on low level and `ShellExec` on the high user lever which see the user in explorer.
For example using of `CreateProcess` one can use command line which length is more as `MAX_PATH`. It has 32,768 character... |
9305714 | How to run sh file from another sh file | 13 | 2012-02-16 04:49:30 | <p>I have a shell script file for monitoring my application, this script will be executed every 10 min by setting cron job.</p>
<p>I would like to some more script files which are related to monitoring should be executed along with master file. So I would like to include my scripts to master file. How to run those s... | 40,225 | 1,006,944 | 2019-12-03 11:09:35 | 9,305,837 | 15 | 2012-02-16 05:05:24 | 1,137,103 | 2016-06-07 18:05:21 | https://stackoverflow.com/q/9305714 | https://stackoverflow.com/a/9305837 | <p>Take a look at <a href="https://stackoverflow.com/questions/9190151/how-to-run-a-shell-script-in-the-backgroung-and-get-no-output">this</a>. If you want to run a script you can use:</p>
<pre><code>./yourscript.sh
</code></pre>
<p>If your script has a loop, use:</p>
<pre><code>./yourscript.sh&
</code></pre>
<... | <p>Take a look at <a href="https://stackoverflow.com/questions/9190151/how-to-run-a-shell-script-in-the-backgroung-and-get-no-output">this</a>. If you want to run a script you can use:</p> <pre><code>./yourscript.sh </code></pre> <p>If your script has a loop, use:</p> <pre><code>./yourscript.sh& </code></pre> <... | 34, 58, 390, 10327 | linux, sh, shell, unix | <h1>How to run sh file from another sh file</h1>
<p>I have a shell script file for monitoring my application, this script will be executed every 10 min by setting cron job.</p>
<p>I would like to some more script files which are related to monitoring should be executed along with master file. So I would like to incl... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,179 | bash | # How to run sh file from another sh file
I have a shell script file for monitoring my application, this script will be executed every 10 min by setting cron job.
I would like to some more script files which are related to monitoring should be executed along with master file. So I would like to include my scripts to ... | Take a look at [this](https://stackoverflow.com/questions/9190151/how-to-run-a-shell-script-in-the-backgroung-and-get-no-output). If you want to run a script you can use:
```
./yourscript.sh
```
If your script has a loop, use:
```
./yourscript.sh&
```
If you want to get the console after starting scripts and you do... |
8902004 | Powershell fails to return proper exit code | 13 | 2012-01-17 21:32:16 | <p>When executing a Powershell script (in 2.0) using the <strong>-File</strong> command line switch, and explicitly defining the input parameters in Param, the exit code is always "0" (never fails) instead of properly returning the defined or expected error code.<br>
This does not occur when using the explicit paramete... | 6,484 | 771,831 | 2013-04-24 14:55:52 | 8,902,329 | 15 | 2012-01-17 21:59:54 | 251,123 | 2012-01-17 21:59:54 | https://stackoverflow.com/q/8902004 | https://stackoverflow.com/a/8902329 | <p>Hmm that's odd, I'd expect <code>exit 1</code> to work in both cases. At least you can use this for both:</p>
<p><code>[Environment]::Exit(1)</code></p>
| <p>Hmm that's odd, I'd expect <code>exit 1</code> to work in both cases. At least you can use this for both:</p> <p><code>[Environment]::Exit(1)</code></p> | 360, 526, 10021, 10355, 17564 | errorlevel, exit-code, parameter-passing, parameters, powershell | <h1>Powershell fails to return proper exit code</h1>
<p>When executing a Powershell script (in 2.0) using the <strong>-File</strong> command line switch, and explicitly defining the input parameters in Param, the exit code is always "0" (never fails) instead of properly returning the defined or expected error code.<br>... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,180 | bash | # Powershell fails to return proper exit code
When executing a Powershell script (in 2.0) using the **-File** command line switch, and explicitly defining the input parameters in Param, the exit code is always "0" (never fails) instead of properly returning the defined or expected error code.
This does not occur whe... | Hmm that's odd, I'd expect `exit 1` to work in both cases. At least you can use this for both:
`[Environment]::Exit(1)` |
218255 | Keeping shell configurations in sync across multiple machines | 13 | 2008-10-20 12:30:18 | <p>I'm a pretty active command line user and I have shell accounts all over the place. MacBooks, Linux desktop machines, Linux servers, Cygwin on XP, you name it.</p>
<p>How can I keep my shell configuration (<code>.bashrc</code>, <code>.vimrc</code> etc.) in sync across all these machines using the limited tools avai... | 4,588 | 20,476 | 2025-03-12 16:51:31 | 6,876,048 | 15 | 2011-07-29 16:18:08 | 20,476 | 2012-11-24 06:46:12 | https://stackoverflow.com/q/218255 | https://stackoverflow.com/a/6876048 | <p>I have folder on Dropbox with global, per OS, and per machine shell configs:</p>
<pre><code>$ ls ~/Dropbox/shell/bash
bashbootstrap bashrc
bashrc-Darwin bashrc-Darwin-laptopname bashrc-Darwin-mininame
bashrc-Linux bashrc-Linux-machineone bashrc-Linux-machinetwo
</code></pre>
<p><code>bashrc</code> is loaded o... | <p>I have folder on Dropbox with global, per OS, and per machine shell configs:</p> <pre><code>$ ls ~/Dropbox/shell/bash bashbootstrap bashrc bashrc-Darwin bashrc-Darwin-laptopname bashrc-Darwin-mininame bashrc-Linux bashrc-Linux-machineone bashrc-Linux-machinetwo </code></pre> <p><code>bashrc</code> is loaded o... | 390, 1652, 2533, 54848 | development-environment, dotfiles, shell, synchronization | <h1>Keeping shell configurations in sync across multiple machines</h1>
<p>I'm a pretty active command line user and I have shell accounts all over the place. MacBooks, Linux desktop machines, Linux servers, Cygwin on XP, you name it.</p>
<p>How can I keep my shell configuration (<code>.bashrc</code>, <code>.vimrc</cod... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,181 | bash | # Keeping shell configurations in sync across multiple machines
I'm a pretty active command line user and I have shell accounts all over the place. MacBooks, Linux desktop machines, Linux servers, Cygwin on XP, you name it.
How can I keep my shell configuration (`.bashrc`, `.vimrc` etc.) in sync across all these mach... | I have folder on Dropbox with global, per OS, and per machine shell configs:
```
$ ls ~/Dropbox/shell/bash
bashbootstrap bashrc
bashrc-Darwin bashrc-Darwin-laptopname bashrc-Darwin-mininame
bashrc-Linux bashrc-Linux-machineone bashrc-Linux-machinetwo
```
`bashrc` is loaded on every machine, `bashrc-Linux`, `bash... |
6006759 | git bash : how to check if there's a new commit available | 13 | 2011-05-15 05:53:15 | <p>I use git with my friend to collaborate on a project. He created a repo in github consisting folders of each of our names, so everytime i update something, I upload it to this folder then push it to github, and so does he. So everytime there's a new commit, we have to pull from github and copy paste the edited files... | 18,776 | 229,424 | 2022-01-20 10:32:14 | 6,006,953 | 15 | 2011-05-15 06:52:44 | 223,092 | 2011-05-15 06:52:44 | https://stackoverflow.com/q/6006759 | https://stackoverflow.com/a/6006953 | <p>Answering your first two questions in turn:</p>
<ol>
<li>Assuming that <code>origin</code> refers to the GitHub repository in each case, you should just run <code>git fetch origin</code>. Then the "remote-tracking branch" <code>origin/master</code> will be at the version of master on GitHub and you can compare it ... | <p>Answering your first two questions in turn:</p> <ol> <li>Assuming that <code>origin</code> refers to the GitHub repository in each case, you should just run <code>git fetch origin</code>. Then the "remote-tracking branch" <code>origin/master</code> will be at the version of master on GitHub and you can compare it ... | 119, 387 | bash, git | <h1>git bash : how to check if there's a new commit available</h1>
<p>I use git with my friend to collaborate on a project. He created a repo in github consisting folders of each of our names, so everytime i update something, I upload it to this folder then push it to github, and so does he. So everytime there's a new ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,182 | bash | # git bash : how to check if there's a new commit available
I use git with my friend to collaborate on a project. He created a repo in github consisting folders of each of our names, so everytime i update something, I upload it to this folder then push it to github, and so does he. So everytime there's a new commit, w... | Answering your first two questions in turn:
1. Assuming that `origin` refers to the GitHub repository in each case, you should just run `git fetch origin`. Then the "remote-tracking branch" `origin/master` will be at the version of master on GitHub and you can compare it with your master with `git diff master origin/m... |
4146635 | custom sorting in powershell | 13 | 2010-11-10 16:28:07 | <p>I have filenames in following format: </p>
<pre><code>[ignore-prefix]-[important-middle]-[ignore-suffix]-[name-with-digits]
</code></pre>
<p>I need to sort according to following rules: first by middle part, then by name, in natural order (i.e. foobar10 > foobar2). I don't know prefix value, but I know the separat... | 7,886 | 499,388 | 2019-07-22 21:26:33 | 4,146,905 | 15 | 2010-11-10 16:58:01 | 323,582 | 2010-11-10 17:43:07 | https://stackoverflow.com/q/4146635 | https://stackoverflow.com/a/4146905 | <p>I understand the task in this way: sorting should be performed by 3 expressions: 1) middle part, 2) name part without digits, 3) number represented by trailing digits of the name part.</p>
<p>Let’s create these expressions with regular expressions. Here is the answer:</p>
<pre><code># gets the middle part
$part1 =... | <p>I understand the task in this way: sorting should be performed by 3 expressions: 1) middle part, 2) name part without digits, 3) number represented by trailing digits of the name part.</p> <p>Let’s create these expressions with regular expressions. Here is the answer:</p> <pre><code># gets the middle part $part1 =... | 526 | powershell | <h1>custom sorting in powershell</h1>
<p>I have filenames in following format: </p>
<pre><code>[ignore-prefix]-[important-middle]-[ignore-suffix]-[name-with-digits]
</code></pre>
<p>I need to sort according to following rules: first by middle part, then by name, in natural order (i.e. foobar10 > foobar2). I don't kno... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,183 | bash | # custom sorting in powershell
I have filenames in following format:
```
[ignore-prefix]-[important-middle]-[ignore-suffix]-[name-with-digits]
```
I need to sort according to following rules: first by middle part, then by name, in natural order (i.e. foobar10 > foobar2). I don't know prefix value, but I know the sep... | I understand the task in this way: sorting should be performed by 3 expressions: 1) middle part, 2) name part without digits, 3) number represented by trailing digits of the name part.
Let’s create these expressions with regular expressions. Here is the answer:
```
# gets the middle part
$part1 = { if ($_.Name -match... |
1251938 | Move files to directories based on first part of filename? | 13 | 2009-08-09 18:32:55 | <p>I have several thousand ebooks that need to be organized on a headless linux server running bash through SSH. All of the ebooks are thankfully named with one of 2 conventions.</p>
<ul>
<li>AuthorFirstName AuthorLastName - Book Title.pdf </li>
<li>AuthorFirstName AuthorLastName - Book Series #inSeries - Book
Title.p... | 20,852 | 153,032 | 2015-07-27 19:49:04 | 1,251,953 | 15 | 2009-08-09 18:38:44 | 47,529 | 2015-05-14 11:44:56 | https://stackoverflow.com/q/1251938 | https://stackoverflow.com/a/1251953 | <pre><code>for f in *.pdf; do
name=`echo "$f"|sed 's/ -.*//'`
letter=`echo "$name"|cut -c1`
dir="DestinationDirectory/$letter/$name"
mkdir -p "$dir"
mv "$f" "$dir"
done
</code></pre>
| <pre><code>for f in *.pdf; do name=`echo "$f"|sed 's/ -.*//'` letter=`echo "$name"|cut -c1` dir="DestinationDirectory/$letter/$name" mkdir -p "$dir" mv "$f" "$dir" done </code></pre> | 387, 1062 | bash, filenames | <h1>Move files to directories based on first part of filename?</h1>
<p>I have several thousand ebooks that need to be organized on a headless linux server running bash through SSH. All of the ebooks are thankfully named with one of 2 conventions.</p>
<ul>
<li>AuthorFirstName AuthorLastName - Book Title.pdf </li>
<li>A... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,184 | bash | # Move files to directories based on first part of filename?
I have several thousand ebooks that need to be organized on a headless linux server running bash through SSH. All of the ebooks are thankfully named with one of 2 conventions.
- AuthorFirstName AuthorLastName - Book Title.pdf
- AuthorFirstName AuthorLastNam... | ```
for f in *.pdf; do
name=`echo "$f"|sed 's/ -.*//'`
letter=`echo "$name"|cut -c1`
dir="DestinationDirectory/$letter/$name"
mkdir -p "$dir"
mv "$f" "$dir"
done
``` |
64584485 | What is the purpose of using the exec command? | 12 | 2020-10-29 03:17:09 | <p>Here I don't understand what the following piece of code is trying to achieve, I did search
online for the use of exec but don't quite get the idea, could anyone please help to explain?</p>
<p>Code snippet:</p>
<pre><code>exec $(dirname "$0")/init.sh -l interface.mod -l instrument.mod -a postinit.mod -a as... | 14,978 | 8,824,969 | 2025-01-09 00:58:43 | 64,584,819 | 15 | 2020-10-29 04:02:48 | 1,218,985 | 2020-10-29 04:02:48 | https://stackoverflow.com/q/64584485 | https://stackoverflow.com/a/64584819 | <p>The <code>exec</code> is a builtin command of the Bash shell which allows you to execute a command that completely replaces the current process, i.e., the current shell process is destroyed, and entirely replaced by the command you specify. It is useful when you want to run a command, but you don't want a bash shell... | <p>The <code>exec</code> is a builtin command of the Bash shell which allows you to execute a command that completely replaces the current process, i.e., the current shell process is destroyed, and entirely replaced by the command you specify. It is useful when you want to run a command, but you don't want a bash shell... | 387, 390 | bash, shell | <h1>What is the purpose of using the exec command?</h1>
<p>Here I don't understand what the following piece of code is trying to achieve, I did search
online for the use of exec but don't quite get the idea, could anyone please help to explain?</p>
<p>Code snippet:</p>
<pre><code>exec $(dirname "$0")/init.sh ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,185 | bash | # What is the purpose of using the exec command?
Here I don't understand what the following piece of code is trying to achieve, I did search
online for the use of exec but don't quite get the idea, could anyone please help to explain?
Code snippet:
```
exec $(dirname "$0")/init.sh -l interface.mod -l instrument.mod ... | The `exec` is a builtin command of the Bash shell which allows you to execute a command that completely replaces the current process, i.e., the current shell process is destroyed, and entirely replaced by the command you specify. It is useful when you want to run a command, but you don't want a bash shell to be the par... |
51293767 | What is the difference between using process substitution vs. a pipe? | 12 | 2018-07-11 20:32:16 | <p>I came across an example for the using <code>tee</code> utility in the <code>tee</code> info page:</p>
<pre><code>wget -O - http://example.com/dvd.iso | tee >(sha1sum > dvd.sha1) > dvd.iso
</code></pre>
<p>I looked up the <code>>(...)</code> syntax and found something called "process substitution". Fro... | 4,035 | 7,327,755 | 2024-10-19 18:41:01 | 51,293,856 | 15 | 2018-07-11 20:39:56 | 1,899,640 | 2018-07-11 20:49:56 | https://stackoverflow.com/q/51293767 | https://stackoverflow.com/a/51293856 | <p>There's no benefit here, as the line could equally well have been written like this:</p>
<pre><code>wget -O - http://example.com/dvd.iso | tee dvd.iso | sha1sum > dvd.sha1
</code></pre>
<p>The differences start to appear when you need to pipe to/from <em>multiple</em> programs, because these can't be expressed ... | <p>There's no benefit here, as the line could equally well have been written like this:</p> <pre><code>wget -O - http://example.com/dvd.iso | tee dvd.iso | sha1sum > dvd.sha1 </code></pre> <p>The differences start to appear when you need to pipe to/from <em>multiple</em> programs, because these can't be expressed ... | 387, 5813, 63638 | bash, pipe, process-substitution | <h1>What is the difference between using process substitution vs. a pipe?</h1>
<p>I came across an example for the using <code>tee</code> utility in the <code>tee</code> info page:</p>
<pre><code>wget -O - http://example.com/dvd.iso | tee >(sha1sum > dvd.sha1) > dvd.iso
</code></pre>
<p>I looked up the <code... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,186 | bash | # What is the difference between using process substitution vs. a pipe?
I came across an example for the using `tee` utility in the `tee` info page:
```
wget -O - http://example.com/dvd.iso | tee >(sha1sum > dvd.sha1) > dvd.iso
```
I looked up the `>(...)` syntax and found something called "process substitution". Fr... | There's no benefit here, as the line could equally well have been written like this:
```
wget -O - http://example.com/dvd.iso | tee dvd.iso | sha1sum > dvd.sha1
```
The differences start to appear when you need to pipe to/from *multiple* programs, because these can't be expressed purely with `|`. Feel free to try:
`... |
46565176 | Powershell: Checking if Network Drive exists, if not, map it then double check | 12 | 2017-10-04 12:42:08 | <p>I am trying to write a simple script to check if a network drive is available, map it if it isn't, then double check the mapping worked (to report any issues like the account mapping it has accidentally expired etc). If it fails at the double check, it will send an email, otherwise it reports all ok. </p>
<p>I cann... | 38,777 | 2,920,544 | 2020-08-17 13:08:10 | 46,566,209 | 15 | 2017-10-04 13:29:44 | 1,238,413 | 2020-08-17 13:08:10 | https://stackoverflow.com/q/46565176 | https://stackoverflow.com/a/46566209 | <p>I like James' answer but want to explain why you're having this issue. The reason your double check is failing is that you actually only check for the Path a single time.</p>
<p>In the beginning of the code, you check to see if the path exists on these two lines</p>
<pre><code>$Networkpath = "X:\Testfolder&quo... | <p>I like James' answer but want to explain why you're having this issue. The reason your double check is failing is that you actually only check for the Path a single time.</p> <p>In the beginning of the code, you check to see if the path exists on these two lines</p> <pre><code>$Networkpath = "X:\Testfolder&quo... | 526 | powershell | <h1>Powershell: Checking if Network Drive exists, if not, map it then double check</h1>
<p>I am trying to write a simple script to check if a network drive is available, map it if it isn't, then double check the mapping worked (to report any issues like the account mapping it has accidentally expired etc). If it fails ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,187 | bash | # Powershell: Checking if Network Drive exists, if not, map it then double check
I am trying to write a simple script to check if a network drive is available, map it if it isn't, then double check the mapping worked (to report any issues like the account mapping it has accidentally expired etc). If it fails at the do... | I like James' answer but want to explain why you're having this issue. The reason your double check is failing is that you actually only check for the Path a single time.
In the beginning of the code, you check to see if the path exists on these two lines
```
$Networkpath = "X:\Testfolder"
$pathExists = Test-Path -P... |
46366042 | How to check if tag exists in if/else | 12 | 2017-09-22 13:31:54 | <p>How can I check if a tag exists in my GIT repo.
I get as input some tagname and I have to check if it's a valid tag with a <code>if else statement.</code>
TAG="tagname"</p>
<p>I tried:</p>
<pre><code>if [ git rev-parse ${TAG} >/dev/null 2>&1 ]; then
echo "tag exists";
else
echo "tag does not exist";
... | 17,857 | 6,077,803 | 2022-03-18 13:57:14 | 46,366,360 | 15 | 2017-09-22 13:47:19 | 4,687,135 | 2017-09-22 13:47:19 | https://stackoverflow.com/q/46366042 | https://stackoverflow.com/a/46366360 | <p>You can use <code>if</code> with a command without <code>test</code> (or it synonym <code>[</code>) and the <code>if</code> command will treat the exit status as the conditional. If it exits with "success" (i.e., <code>0</code>) then it's true, otherwise it's false:</p>
<pre><code>if git rev-parse "$TAG" >/dev/... | <p>You can use <code>if</code> with a command without <code>test</code> (or it synonym <code>[</code>) and the <code>if</code> command will treat the exit status as the conditional. If it exits with "success" (i.e., <code>0</code>) then it's true, otherwise it's false:</p> <pre><code>if git rev-parse "$TAG" >/dev/... | 119, 387, 2773 | bash, git, if-statement | <h1>How to check if tag exists in if/else</h1>
<p>How can I check if a tag exists in my GIT repo.
I get as input some tagname and I have to check if it's a valid tag with a <code>if else statement.</code>
TAG="tagname"</p>
<p>I tried:</p>
<pre><code>if [ git rev-parse ${TAG} >/dev/null 2>&1 ]; then
echo "... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,188 | bash | # How to check if tag exists in if/else
How can I check if a tag exists in my GIT repo.
I get as input some tagname and I have to check if it's a valid tag with a `if else statement.`
TAG="tagname"
I tried:
```
if [ git rev-parse ${TAG} >/dev/null 2>&1 ]; then
echo "tag exists";
else
echo "tag does not exist";
`... | You can use `if` with a command without `test` (or it synonym `[`) and the `if` command will treat the exit status as the conditional. If it exits with "success" (i.e., `0`) then it's true, otherwise it's false:
```
if git rev-parse "$TAG" >/dev/null 2>&1; then
echo "tag exists";
else
echo "tag does not exist"
fi
... |
44815086 | Bitbucket Pipelines run npm fails | 12 | 2017-06-29 01:47:08 | <p>I have configured a PHP image for my Bitbucket's Pipelines that runs scripts thru a YML file. I have a laravel repository and want to execute a build command.</p>
<p>Though the problem is that on my script, when it runs the <code>npm install</code>, it fails.</p>
<p><code>bash: npm: command not found</code></p>
<... | 9,755 | 1,781,041 | 2021-03-30 09:02:33 | 44,822,491 | 15 | 2017-06-29 10:21:42 | 4,172,960 | 2017-06-29 10:21:42 | https://stackoverflow.com/q/44815086 | https://stackoverflow.com/a/44822491 | <p>This should help. It'll install Node v8 and NPM v5. Put it before <code>npm install --global gulp-cli</code></p>
<pre><code>script:
- curl -sL https://deb.nodesource.com/setup_8.x | bash -
- apt-get install -y nodejs
</code></pre>
| <p>This should help. It'll install Node v8 and NPM v5. Put it before <code>npm install --global gulp-cli</code></p> <pre><code>script: - curl -sL https://deb.nodesource.com/setup_8.x | bash - - apt-get install -y nodejs </code></pre> | 58, 387, 8337, 46426, 120147 | bash, bitbucket, bitbucket-pipelines, linux, node.js | <h1>Bitbucket Pipelines run npm fails</h1>
<p>I have configured a PHP image for my Bitbucket's Pipelines that runs scripts thru a YML file. I have a laravel repository and want to execute a build command.</p>
<p>Though the problem is that on my script, when it runs the <code>npm install</code>, it fails.</p>
<p><code... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,189 | bash | # Bitbucket Pipelines run npm fails
I have configured a PHP image for my Bitbucket's Pipelines that runs scripts thru a YML file. I have a laravel repository and want to execute a build command.
Though the problem is that on my script, when it runs the `npm install`, it fails.
`bash: npm: command not found`
```
# T... | This should help. It'll install Node v8 and NPM v5. Put it before `npm install --global gulp-cli`
```
script:
- curl -sL https://deb.nodesource.com/setup_8.x | bash -
- apt-get install -y nodejs
``` |
44194427 | virtualenv activate does not work | 12 | 2017-05-26 05:45:28 | <p>I am trying to create a virtual environment to test an api.</p>
<p>I can create the environment just fine using <code>virtualenv test</code>, then I can cd into it. When I try to run <code>activate</code>, I get this error:</p>
<pre><code>PS C:\Users\Bright Bridge\Desktop\autocomplete_demo\Scripts> activate
ac... | 82,038 | 7,864,777 | 2025-04-24 09:45:17 | 44,194,501 | 15 | 2017-05-26 05:51:39 | 3,277,713 | 2017-05-26 05:51:39 | https://stackoverflow.com/q/44194427 | https://stackoverflow.com/a/44194501 | <p>If you press <code>WindowsKey + R</code>, and type <code>cmd</code> when the box comes up, it should bring up the command line interface instead of powershell!</p>
| <p>If you press <code>WindowsKey + R</code>, and type <code>cmd</code> when the box comes up, it should bring up the command line interface instead of powershell!</p> | 16, 526, 14529 | powershell, python, virtualenv | <h1>virtualenv activate does not work</h1>
<p>I am trying to create a virtual environment to test an api.</p>
<p>I can create the environment just fine using <code>virtualenv test</code>, then I can cd into it. When I try to run <code>activate</code>, I get this error:</p>
<pre><code>PS C:\Users\Bright Bridge\Deskto... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,190 | bash | # virtualenv activate does not work
I am trying to create a virtual environment to test an api.
I can create the environment just fine using `virtualenv test`, then I can cd into it. When I try to run `activate`, I get this error:
```
PS C:\Users\Bright Bridge\Desktop\autocomplete_demo\Scripts> activate
activate : T... | If you press `WindowsKey + R`, and type `cmd` when the box comes up, it should bring up the command line interface instead of powershell! |
43707685 | `set -u` (nounset) vs checking whether I have arguments | 12 | 2017-04-30 14:49:31 | <p>I'm trying to improve this <a href="https://github.com/SELinuxProject/selinux/blob/5ed45797df92494a137e16eafb64d54490b1d0d5/policycoreutils/scripts/fixfiles" rel="noreferrer">nasty old script</a>. I found an undefined variable error to fix, so I added <code>set -u</code> to catch any similar errors.</p>
<p>I get a... | 11,499 | 799,204 | 2019-06-11 15:08:37 | 43,707,750 | 15 | 2017-04-30 14:54:55 | 2,302,862 | 2017-04-30 19:13:55 | https://stackoverflow.com/q/43707685 | https://stackoverflow.com/a/43707750 | <p><code>$#</code> contains the number of arguments, so you can test for <code>$1</code>, <code>$2</code>, etc. to exist before accessing them.</p>
<pre><code>if (( $# == 0 )); then
# no arguments
else
# have arguments
fi;
</code></pre>
| <p><code>$#</code> contains the number of arguments, so you can test for <code>$1</code>, <code>$2</code>, etc. to exist before accessing them.</p> <pre><code>if (( $# == 0 )); then # no arguments else # have arguments fi; </code></pre> | 387 | bash | <h1>`set -u` (nounset) vs checking whether I have arguments</h1>
<p>I'm trying to improve this <a href="https://github.com/SELinuxProject/selinux/blob/5ed45797df92494a137e16eafb64d54490b1d0d5/policycoreutils/scripts/fixfiles" rel="noreferrer">nasty old script</a>. I found an undefined variable error to fix, so I added... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,191 | bash | # `set -u` (nounset) vs checking whether I have arguments
I'm trying to improve this [nasty old script](https://github.com/SELinuxProject/selinux/blob/5ed45797df92494a137e16eafb64d54490b1d0d5/policycoreutils/scripts/fixfiles). I found an undefined variable error to fix, so I added `set -u` to catch any similar errors.... | `$#` contains the number of arguments, so you can test for `$1`, `$2`, etc. to exist before accessing them.
```
if (( $# == 0 )); then
# no arguments
else
# have arguments
fi;
``` |
43582494 | What is the difference between `sed -i -e` and `sed -ie`? | 12 | 2017-04-24 07:46:41 | <p>What is the difference between <code>sed -i -e</code> and <code>sed -ie</code> ?
It's not very clear from help
<code>sed --help</code></p>
<pre><code> -e script, --expression=script
add the script to the commands to be executed
</code></pre>
<p>In second case it creates some backup file?</p>
<p>... | 31,093 | 1,179,925 | 2017-04-24 15:01:32 | 43,582,772 | 15 | 2017-04-24 08:01:55 | 874,178 | 2017-04-24 08:01:55 | https://stackoverflow.com/q/43582494 | https://stackoverflow.com/a/43582772 | <p>When you give <code>sed -i -e</code>, <code>sed</code> sees two options.</p>
<p>But, When you give <code>sed -ie</code>, <code>sed</code> sees <code>-i</code> option only with <code>suffix</code> as <code>e</code>. That is the reason you got file backup with <code>e</code> suffix.</p>
<blockquote>
<p>From <code>... | <p>When you give <code>sed -i -e</code>, <code>sed</code> sees two options.</p> <p>But, When you give <code>sed -ie</code>, <code>sed</code> sees <code>-i</code> option only with <code>suffix</code> as <code>e</code>. That is the reason you got file backup with <code>e</code> suffix.</p> <blockquote> <p>From <code>... | 34, 387, 5282 | bash, sed, unix | <h1>What is the difference between `sed -i -e` and `sed -ie`?</h1>
<p>What is the difference between <code>sed -i -e</code> and <code>sed -ie</code> ?
It's not very clear from help
<code>sed --help</code></p>
<pre><code> -e script, --expression=script
add the script to the commands to be executed
</c... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,192 | bash | # What is the difference between `sed -i -e` and `sed -ie`?
What is the difference between `sed -i -e` and `sed -ie` ?
It's not very clear from help
`sed --help`
```
-e script, --expression=script
add the script to the commands to be executed
```
In second case it creates some backup file?
In gen... | When you give `sed -i -e`, `sed` sees two options.
But, When you give `sed -ie`, `sed` sees `-i` option only with `suffix` as `e`. That is the reason you got file backup with `e` suffix.
> From `man sed`:
>
> -i[SUFFIX], --in-place[=SUFFIX]
>
> edit files in place (makes backup if SUFFIX supplied) |
34005959 | wget: what does this trailing dash represent/do? | 12 | 2015-11-30 19:01:07 | <p><code>wget http://ipinfo.io/ip -qO -</code></p>
<p>I'm new to <code>bash</code> and can't seem to figure out what that trailing dash character does (or why it is required in this command).</p>
<p>Any help is much appreciated.</p>
| 2,826 | 1,419,236 | 2015-11-30 19:23:17 | 34,005,984 | 15 | 2015-11-30 19:02:37 | 14,122 | 2015-11-30 19:21:27 | https://stackoverflow.com/q/34005959 | https://stackoverflow.com/a/34005984 | <p>By convention (which not all programs follow), a dash in filename position refers to stdin or stdout, as appropriate. Since this is an argument to <code>-O</code> (output), it refers to stdout.</p>
<p>A more verbose way to write this (on Linux or other operating systems where <code>/dev/stdout</code> is usable by p... | <p>By convention (which not all programs follow), a dash in filename position refers to stdin or stdout, as appropriate. Since this is an argument to <code>-O</code> (output), it refers to stdout.</p> <p>A more verbose way to write this (on Linux or other operating systems where <code>/dev/stdout</code> is usable by p... | 390, 5583 | shell, wget | <h1>wget: what does this trailing dash represent/do?</h1>
<p><code>wget http://ipinfo.io/ip -qO -</code></p>
<p>I'm new to <code>bash</code> and can't seem to figure out what that trailing dash character does (or why it is required in this command).</p>
<p>Any help is much appreciated.</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,193 | bash | # wget: what does this trailing dash represent/do?
`wget http://ipinfo.io/ip -qO -`
I'm new to `bash` and can't seem to figure out what that trailing dash character does (or why it is required in this command).
Any help is much appreciated. | By convention (which not all programs follow), a dash in filename position refers to stdin or stdout, as appropriate. Since this is an argument to `-O` (output), it refers to stdout.
A more verbose way to write this (on Linux or other operating systems where `/dev/stdout` is usable by programs other than just the shel... |
33325301 | Killing a bash script does not kill child processes | 12 | 2015-10-25 01:45:36 | <p>I have written a test script which runs another script to start the server to test. When the tests have completed a <code>SIGKILL</code> message is sent to the server process, however when running the test script again the server throws a <code>EADDRINUSE</code> error (I‘m in a node.js environment) which means the p... | 6,618 | 1,568,890 | 2019-02-08 11:01:36 | 33,367,711 | 15 | 2015-10-27 12:12:34 | 155,033 | 2015-10-28 11:49:45 | https://stackoverflow.com/q/33325301 | https://stackoverflow.com/a/33367711 | <p>To kill a child process and all it's children you may use <a href="https://nodejs.org/api/process.html#process_process_kill_pid_signal"><code>process.kill</code></a> with a negative <code>pid</code> (to kill a process group)</p>
<pre><code>var child = child_process.spawn('scripts/start-node.sh', {detached: true})
/... | <p>To kill a child process and all it's children you may use <a href="https://nodejs.org/api/process.html#process_process_kill_pid_signal"><code>process.kill</code></a> with a negative <code>pid</code> (to kill a process group)</p> <pre><code>var child = child_process.spawn('scripts/start-node.sh', {detached: true}) /... | 387, 5910, 18570, 26115, 46426 | bash, child-process, node.js, process, sigkill | <h1>Killing a bash script does not kill child processes</h1>
<p>I have written a test script which runs another script to start the server to test. When the tests have completed a <code>SIGKILL</code> message is sent to the server process, however when running the test script again the server throws a <code>EADDRINUSE<... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,194 | bash | # Killing a bash script does not kill child processes
I have written a test script which runs another script to start the server to test. When the tests have completed a `SIGKILL` message is sent to the server process, however when running the test script again the server throws a `EADDRINUSE` error (I‘m in a node.js ... | To kill a child process and all it's children you may use [`process.kill`](https://nodejs.org/api/process.html#process_process_kill_pid_signal) with a negative `pid` (to kill a process group)
```
var child = child_process.spawn('scripts/start-node.sh', {detached: true})
// Later…
process.kill(-child.pid, 'SIGKILL');
`... |
27545244 | I can't install 'pip' for python | 12 | 2014-12-18 11:14:13 | <p>I'm going trough the book Learn Python The Hard Way and i need to install pip.<a href="http://learnpythonthehardway.org/book/ex46.html" rel="noreferrer">(ex46</a>,ex47)
So i saved <a href="https://raw.githubusercontent.com/pypa/pip/master/contrib/get-pip.py" rel="noreferrer">get-pip.py</a> on my computer and in pow... | 69,535 | 3,753,471 | 2021-02-09 12:44:06 | 27,549,660 | 15 | 2014-12-18 15:09:02 | 393,194 | 2014-12-18 15:09:02 | https://stackoverflow.com/q/27545244 | https://stackoverflow.com/a/27549660 | <p>Whenever I've installed pip on my Windows machine, it installs to my Python's Scripts folder:</p>
<pre><code>c:\Python34\Scripts
</code></pre>
<p>So to get pip to run on the command line, I had to add that path to my PATH environment variable. You can get to those settings by doing the following (assuming Windows ... | <p>Whenever I've installed pip on my Windows machine, it installs to my Python's Scripts folder:</p> <pre><code>c:\Python34\Scripts </code></pre> <p>So to get pip to run on the command line, I had to add that path to my PATH environment variable. You can get to those settings by doing the following (assuming Windows ... | 16, 64, 526, 5119, 59047 | pip, powershell, python, python-2.7, windows | <h1>I can't install 'pip' for python</h1>
<p>I'm going trough the book Learn Python The Hard Way and i need to install pip.<a href="http://learnpythonthehardway.org/book/ex46.html" rel="noreferrer">(ex46</a>,ex47)
So i saved <a href="https://raw.githubusercontent.com/pypa/pip/master/contrib/get-pip.py" rel="noreferrer... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,195 | bash | # I can't install 'pip' for python
I'm going trough the book Learn Python The Hard Way and i need to install pip.[(ex46](http://learnpythonthehardway.org/book/ex46.html),ex47)
So i saved [get-pip.py](https://raw.githubusercontent.com/pypa/pip/master/contrib/get-pip.py) on my computer and in powershell i did :
```
PS ... | Whenever I've installed pip on my Windows machine, it installs to my Python's Scripts folder:
```
c:\Python34\Scripts
```
So to get pip to run on the command line, I had to add that path to my PATH environment variable. You can get to those settings by doing the following (assuming Windows 7 or newer):
1. Right clic... |
18685772 | How to set Powershell background color programmatically to RGB Value | 12 | 2013-09-08 16:06:27 | <p>The current selection of 16 colors from Console Colors is not the right choice for me. I would like to use much darker variants of these for the background.</p>
<p>I could definitely set these using the UI and changing the RGB value there.</p>
<p><img src="https://i.sstatic.net/pt1Aj.png" alt="Selecting Blue and c... | 37,857 | 2,672,562 | 2018-12-17 18:42:00 | 18,686,048 | 15 | 2013-09-08 16:35:23 | 526,535 | 2013-09-08 16:35:23 | https://stackoverflow.com/q/18685772 | https://stackoverflow.com/a/18686048 | <p>This old post by Lee Holmes explains how you can go about changing the color to any value you want. You have to change the registry - <a href="http://www.leeholmes.com/blog/2008/06/01/powershells-noble-blue/">http://www.leeholmes.com/blog/2008/06/01/powershells-noble-blue/</a></p>
<pre><code>Push-Location
Set-Loca... | <p>This old post by Lee Holmes explains how you can go about changing the color to any value you want. You have to change the registry - <a href="http://www.leeholmes.com/blog/2008/06/01/powershells-noble-blue/">http://www.leeholmes.com/blog/2008/06/01/powershells-noble-blue/</a></p> <pre><code>Push-Location Set-Loca... | 488, 526 | console, powershell | <h1>How to set Powershell background color programmatically to RGB Value</h1>
<p>The current selection of 16 colors from Console Colors is not the right choice for me. I would like to use much darker variants of these for the background.</p>
<p>I could definitely set these using the UI and changing the RGB value there... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,196 | bash | # How to set Powershell background color programmatically to RGB Value
The current selection of 16 colors from Console Colors is not the right choice for me. I would like to use much darker variants of these for the background.
I could definitely set these using the UI and changing the RGB value there.
![Selecting B... | This old post by Lee Holmes explains how you can go about changing the color to any value you want. You have to change the registry - <http://www.leeholmes.com/blog/2008/06/01/powershells-noble-blue/>
```
Push-Location
Set-Location HKCU:\Console
New-Item ".\%SystemRoot%_system32_WindowsPowerShell_v1.0_powershell.exe... |
17330188 | Remove first N lines of a file in place in unix command line | 12 | 2013-06-26 20:49:26 | <p>I'm trying to remove the first 37 lines from a very, very large file. I started trying sed and awk, but they seem to require copying the data to a new file. I'm looking for a "remove lines in place" method, that unlike <code>sed -i</code> is not making copies of any kind, but rather is just removing lines from the... | 39,975 | 1,052,117 | 2023-10-14 06:22:02 | 17,331,179 | 15 | 2013-06-26 21:57:07 | 1,745,001 | 2020-09-21 12:40:30 | https://stackoverflow.com/q/17330188 | https://stackoverflow.com/a/17331179 | <p>There's no simple way to do inplace editing using UNIX utilities, but here's one inplace file modification solution that you might be able to modify to work for you (courtesy of Robert Bonomi at <a href="https://groups.google.com/forum/#!topic/comp.unix.shell/5PRRZIP0v64" rel="noreferrer">https://groups.google.com/f... | <p>There's no simple way to do inplace editing using UNIX utilities, but here's one inplace file modification solution that you might be able to modify to work for you (courtesy of Robert Bonomi at <a href="https://groups.google.com/forum/#!topic/comp.unix.shell/5PRRZIP0v64" rel="noreferrer">https://groups.google.com/f... | 387, 990, 5282, 11225 | awk, bash, command-line-interface, sed | <h1>Remove first N lines of a file in place in unix command line</h1>
<p>I'm trying to remove the first 37 lines from a very, very large file. I started trying sed and awk, but they seem to require copying the data to a new file. I'm looking for a "remove lines in place" method, that unlike <code>sed -i</code> is not... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,197 | bash | # Remove first N lines of a file in place in unix command line
I'm trying to remove the first 37 lines from a very, very large file. I started trying sed and awk, but they seem to require copying the data to a new file. I'm looking for a "remove lines in place" method, that unlike `sed -i` is not making copies of any ... | There's no simple way to do inplace editing using UNIX utilities, but here's one inplace file modification solution that you might be able to modify to work for you (courtesy of Robert Bonomi at <https://groups.google.com/forum/#!topic/comp.unix.shell/5PRRZIP0v64>):
```
bytes=$(head -37 "$file" |wc -c)
dd if="$file" b... |
17091500 | AWK command to print until end of line | 12 | 2013-06-13 15:50:17 | <p>I have a quick question regarding the AWK command. I need the command to print until the end of the line on the same line, but then when it gets to the next line I need it to print on another line. The following example will provide better clarity. </p>
<p>Say I have a file:</p>
<pre><code>0 1 2 3 This is line one... | 75,941 | 1,998,581 | 2023-11-01 10:19:38 | 17,091,579 | 15 | 2013-06-13 15:53:54 | 1,983,854 | 2017-11-16 19:44:12 | https://stackoverflow.com/q/17091500 | https://stackoverflow.com/a/17091579 | <p>It may be more straight-forward to use <code>cut</code>:</p>
<pre><code>$ cut -d' ' -f5- file
This is line one
This is line two
This is line three
This is line four
</code></pre>
<p>This says: on space-separated fields, print from the 5th up to the end of the line.</p>
<p>If you happen to have multiple spaces i... | <p>It may be more straight-forward to use <code>cut</code>:</p> <pre><code>$ cut -d' ' -f5- file This is line one This is line two This is line three This is line four </code></pre> <p>This says: on space-separated fields, print from the 5th up to the end of the line.</p> <p>If you happen to have multiple spaces i... | 34, 390, 990 | awk, shell, unix | <h1>AWK command to print until end of line</h1>
<p>I have a quick question regarding the AWK command. I need the command to print until the end of the line on the same line, but then when it gets to the next line I need it to print on another line. The following example will provide better clarity. </p>
<p>Say I have ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,198 | bash | # AWK command to print until end of line
I have a quick question regarding the AWK command. I need the command to print until the end of the line on the same line, but then when it gets to the next line I need it to print on another line. The following example will provide better clarity.
Say I have a file:
```
0 1 ... | It may be more straight-forward to use `cut`:
```
$ cut -d' ' -f5- file
This is line one
This is line two
This is line three
This is line four
```
This says: on space-separated fields, print from the 5th up to the end of the line.
If you happen to have multiple spaces in between fields, you may initially want to s... |
16995425 | How does cmd > /dev/null 2>&1 work? | 12 | 2013-06-08 02:29:16 | <p>I'm reading up on redirecting data to <code>/dev/null</code> and so I tried a simple test:</p>
<pre><code>ping a.b.c # which results in an address not found
</code></pre>
<p>If I try this:</p>
<pre><code>ping a.b.c > /dev/null # prints the same error message as the one above
</code></pre>
<p>However, if I do... | 42,798 | 1,492,471 | 2017-11-19 02:42:53 | 16,995,472 | 15 | 2013-06-08 02:35:59 | 2,193,235 | 2014-10-30 20:15:48 | https://stackoverflow.com/q/16995425 | https://stackoverflow.com/a/16995472 | <p>You are right, <code>2</code> is <code>STDERR</code>, <code>1</code> is <code>STDOUT</code>. When you do <code>2>&1</code> you are saying: "print to <code>STDOUT</code> (<code>1</code>) the things that would go to <code>STDERR</code> (<code>2</code>)". And before that, you said your <code>STDOUT</code> would ... | <p>You are right, <code>2</code> is <code>STDERR</code>, <code>1</code> is <code>STDOUT</code>. When you do <code>2>&1</code> you are saying: "print to <code>STDOUT</code> (<code>1</code>) the things that would go to <code>STDERR</code> (<code>2</code>)". And before that, you said your <code>STDOUT</code> would ... | 34, 58, 387, 390 | bash, linux, shell, unix | <h1>How does cmd > /dev/null 2>&1 work?</h1>
<p>I'm reading up on redirecting data to <code>/dev/null</code> and so I tried a simple test:</p>
<pre><code>ping a.b.c # which results in an address not found
</code></pre>
<p>If I try this:</p>
<pre><code>ping a.b.c > /dev/null # prints the same error message as the... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,199 | bash | # How does cmd > /dev/null 2>&1 work?
I'm reading up on redirecting data to `/dev/null` and so I tried a simple test:
```
ping a.b.c # which results in an address not found
```
If I try this:
```
ping a.b.c > /dev/null # prints the same error message as the one above
```
However, if I do this:
```
ping a.b.c > /... | You are right, `2` is `STDERR`, `1` is `STDOUT`. When you do `2>&1` you are saying: "print to `STDOUT` (`1`) the things that would go to `STDERR` (`2`)". And before that, you said your `STDOUT` would go to `/dev/null`. Therefore, nothing is seen. In the examples 1 and 2 you get the output message because it is being pr... |
16790666 | Reading event log remotely with Get-EventLog in Powershell | 12 | 2013-05-28 11:16:21 | <p>I've a powershell script which runs on server(test-server) and reads the log file of his client(DC1).</p>
<ul>
<li>Both sides can ping to each other.</li>
<li>On both sides, firewalls are disabled.</li>
<li><p>Remote Desktop and Remote Assistance are enabled on DC1.</p>
<pre><code>Get-EventLog System -ComputerName... | 56,974 | 1,816,781 | 2017-08-24 10:01:40 | 16,807,919 | 15 | 2013-05-29 07:28:07 | 1,816,781 | 2016-09-23 14:12:27 | https://stackoverflow.com/q/16790666 | https://stackoverflow.com/a/16807919 | <p>@Lars Truijens's suggestion solved my issue. But other suggestions are also important to check.</p>
<p>So, here is the checklist if you get this kind of error when you try to get log files remotely:</p>
<ul>
<li>Disable or set firewall settings on both sides.</li>
<li>Enable Remote Desktop and Remote Assistance on... | <p>@Lars Truijens's suggestion solved my issue. But other suggestions are also important to check.</p> <p>So, here is the checklist if you get this kind of error when you try to get log files remotely:</p> <ul> <li>Disable or set firewall settings on both sides.</li> <li>Enable Remote Desktop and Remote Assistance on... | 526, 63177, 153947 | powershell, powershell-cmdlet, powershell-remoting | <h1>Reading event log remotely with Get-EventLog in Powershell</h1>
<p>I've a powershell script which runs on server(test-server) and reads the log file of his client(DC1).</p>
<ul>
<li>Both sides can ping to each other.</li>
<li>On both sides, firewalls are disabled.</li>
<li><p>Remote Desktop and Remote Assistance a... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,200 | bash | # Reading event log remotely with Get-EventLog in Powershell
I've a powershell script which runs on server(test-server) and reads the log file of his client(DC1).
- Both sides can ping to each other.
- On both sides, firewalls are disabled.
- Remote Desktop and Remote Assistance are enabled on DC1.
```
Get-Event... | @Lars Truijens's suggestion solved my issue. But other suggestions are also important to check.
So, here is the checklist if you get this kind of error when you try to get log files remotely:
- Disable or set firewall settings on both sides.
- Enable Remote Desktop and Remote Assistance on client machine.
- Can you p... |
15932356 | Bash script - how to fill array? | 12 | 2013-04-10 17:18:12 | <p>Let's say I have this directory structure:</p>
<pre><code>DIRECTORY:
.........a
.........b
.........c
.........d
</code></pre>
<p>What I want to do is: I want to store elements of a directory in an array</p>
<p>something like : <code>array = ls /home/user/DIRECTORY</code></p>
<p>so that <code>array[0]</code... | 29,472 | 1,926,550 | 2021-12-01 13:12:51 | 15,932,690 | 15 | 2013-04-10 17:37:53 | 1,155,000 | 2013-04-10 17:37:53 | https://stackoverflow.com/q/15932356 | https://stackoverflow.com/a/15932690 | <p>You can't simply do <code>array = ls /home/user/DIRECTORY</code>, because - even with proper syntax - it wouldn't give you an array, but a string that you would have to parse, and <a href="http://mywiki.wooledge.org/ParsingLs" rel="noreferrer">Parsing <code>ls</code> is punishable by law</a>. You can, however, use b... | <p>You can't simply do <code>array = ls /home/user/DIRECTORY</code>, because - even with proper syntax - it wouldn't give you an array, but a string that you would have to parse, and <a href="http://mywiki.wooledge.org/ParsingLs" rel="noreferrer">Parsing <code>ls</code> is punishable by law</a>. You can, however, use b... | 114, 387, 3589 | arrays, bash, ls | <h1>Bash script - how to fill array?</h1>
<p>Let's say I have this directory structure:</p>
<pre><code>DIRECTORY:
.........a
.........b
.........c
.........d
</code></pre>
<p>What I want to do is: I want to store elements of a directory in an array</p>
<p>something like : <code>array = ls /home/user/DIRECTORY</... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,201 | bash | # Bash script - how to fill array?
Let's say I have this directory structure:
```
DIRECTORY:
.........a
.........b
.........c
.........d
```
What I want to do is: I want to store elements of a directory in an array
something like : `array = ls /home/user/DIRECTORY`
so that `array[0]` contains name of first fil... | You can't simply do `array = ls /home/user/DIRECTORY`, because - even with proper syntax - it wouldn't give you an array, but a string that you would have to parse, and [Parsing `ls` is punishable by law](http://mywiki.wooledge.org/ParsingLs). You can, however, use built-in Bash constructs to achieve what you want :
`... |
15520796 | Scripts for listing all the distinct characters in a text file | 12 | 2013-03-20 10:19:27 | <p>E.g.</p>
<p>Given a file <code>input.txt</code>, which has the following content:</p>
<pre><code>He likes cats, really?
</code></pre>
<p>the output would be like:</p>
<pre><code>H
e
l
i
k
s
c
a
t
,
r
l
y
?
</code></pre>
<p>Note the order of characters in output does not matter.</p>
| 7,345 | 1,258,409 | 2013-03-20 11:15:36 | 15,520,905 | 15 | 2013-03-20 10:24:35 | 714,501 | 2013-03-20 10:24:35 | https://stackoverflow.com/q/15520796 | https://stackoverflow.com/a/15520905 | <p>How about:</p>
<pre><code>echo "He likes cats, really?" | fold -w1 | sort -u
</code></pre>
| <p>How about:</p> <pre><code>echo "He likes cats, really?" | fold -w1 | sort -u </code></pre> | 387, 990, 5282 | awk, bash, sed | <h1>Scripts for listing all the distinct characters in a text file</h1>
<p>E.g.</p>
<p>Given a file <code>input.txt</code>, which has the following content:</p>
<pre><code>He likes cats, really?
</code></pre>
<p>the output would be like:</p>
<pre><code>H
e
l
i
k
s
c
a
t
,
r
l
y
?
</code></pre>
<p>Note the order o... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,202 | bash | # Scripts for listing all the distinct characters in a text file
E.g.
Given a file `input.txt`, which has the following content:
```
He likes cats, really?
```
the output would be like:
```
H
e
l
i
k
s
c
a
t
,
r
l
y
?
```
Note the order of characters in output does not matter. | How about:
```
echo "He likes cats, really?" | fold -w1 | sort -u
``` |
14103197 | How can I tell if I'm in a remote PowerShell session? | 12 | 2012-12-31 15:12:28 | <p>I would like to execute code that is specific to remote PSSessions. That is, the code doesn't apply locally, but applies to all remote sessions.</p>
<p>Is there any environment variable, function or cmdlet that would effectively return true if I'm in an active PSSession and false if I'm running locally?</p>
| 3,862 | 817,630 | 2022-05-05 13:33:36 | 14,103,639 | 15 | 2012-12-31 16:01:35 | 9,833 | 2016-07-04 20:32:06 | https://stackoverflow.com/q/14103197 | https://stackoverflow.com/a/14103639 | <p>Check if the <code>$PSSenderInfo</code> variable exists. From <em>about_Automatic_Variables</em>:</p>
<blockquote>
<h3><code>$PSSenderInfo</code></h3>
<p>Contains information about the user who started the PSSession,
including the user identity and the time zone of the originating
computer. This variabl... | <p>Check if the <code>$PSSenderInfo</code> variable exists. From <em>about_Automatic_Variables</em>:</p> <blockquote> <h3><code>$PSSenderInfo</code></h3> <p>Contains information about the user who started the PSSession, including the user identity and the time zone of the originating computer. This variabl... | 526, 63177 | powershell, powershell-remoting | <h1>How can I tell if I'm in a remote PowerShell session?</h1>
<p>I would like to execute code that is specific to remote PSSessions. That is, the code doesn't apply locally, but applies to all remote sessions.</p>
<p>Is there any environment variable, function or cmdlet that would effectively return true if I'm in an... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,203 | bash | # How can I tell if I'm in a remote PowerShell session?
I would like to execute code that is specific to remote PSSessions. That is, the code doesn't apply locally, but applies to all remote sessions.
Is there any environment variable, function or cmdlet that would effectively return true if I'm in an active PSSessio... | Check if the `$PSSenderInfo` variable exists. From *about_Automatic_Variables*:
> ### `$PSSenderInfo`
>
> Contains information about the user who started the PSSession,
> including the user identity and the time zone of the originating
> computer. This variable is available only in PSSessions.
>
> The `$PSSenderInfo` ... |
13371407 | How do I alias a PowerShell script to be called from prompt? | 12 | 2012-11-14 00:44:51 | <p>I have a PowerShell script that opens all files and programs related to my development environment. Rather than typing</p>
<pre><code>> &.\mysetup.ps1
</code></pre>
<p>is there some way I can alias it to just type</p>
<pre><code>> gosetup
</code></pre>
<p>?</p>
<p>Ideally I'll use this functionality f... | 16,084 | 992,954 | 2017-06-24 20:23:49 | 13,371,499 | 15 | 2012-11-14 00:54:55 | 790,107 | 2017-06-24 20:23:49 | https://stackoverflow.com/q/13371407 | https://stackoverflow.com/a/13371499 | <ul>
<li>First you need to set up your PowerShell profile, if you haven't done so already.</li>
<li>Create a directory where you want to keep your aliased scripts (I use C:\ps).</li>
<li><p>In your profile, add the following lines:</p>
<pre><code>$ps_script_dir = "C:\path\to\scripts"
New-Alias <alias name> $ps_... | <ul> <li>First you need to set up your PowerShell profile, if you haven't done so already.</li> <li>Create a directory where you want to keep your aliased scripts (I use C:\ps).</li> <li><p>In your profile, add the following lines:</p> <pre><code>$ps_script_dir = "C:\path\to\scripts" New-Alias <alias name> $ps_... | 526, 2631 | cmd, powershell | <h1>How do I alias a PowerShell script to be called from prompt?</h1>
<p>I have a PowerShell script that opens all files and programs related to my development environment. Rather than typing</p>
<pre><code>> &.\mysetup.ps1
</code></pre>
<p>is there some way I can alias it to just type</p>
<pre><code>> gos... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,204 | bash | # How do I alias a PowerShell script to be called from prompt?
I have a PowerShell script that opens all files and programs related to my development environment. Rather than typing
```
> &.\mysetup.ps1
```
is there some way I can alias it to just type
```
> gosetup
```
?
Ideally I'll use this functionality for o... | - First you need to set up your PowerShell profile, if you haven't done so already.
- Create a directory where you want to keep your aliased scripts (I use C:\ps).
- In your profile, add the following lines:
```
$ps_script_dir = "C:\path\to\scripts"
New-Alias <alias name> $ps_script_dir\<script name>
```
- Op... |
13018305 | Difference between mkdir and mkdir -p? | 12 | 2012-10-22 19:22:17 | <p>I've been following Learn Code the Hard Way's tutorial on learning how to utilize the command line interface in PowerShell. In <a href="http://cli.learncodethehardway.org/book/cli-crash-coursech8.html">this</a> article, it tells me to use the command <code>mkdir -p i\like\icecream</code>. At the bottom, it explains ... | 18,362 | 1,602,525 | 2018-09-05 12:57:24 | 13,018,424 | 15 | 2012-10-22 19:29:26 | 1,358 | 2015-08-20 12:04:33 | https://stackoverflow.com/q/13018305 | https://stackoverflow.com/a/13018424 | <p>PowerShell does its best to determine what parameter you mean even if you don't give it fully. Thus if you use the <code>-p</code> parameter, you are actually using <code>-path</code>.</p>
<p>For the mkdir function, the <code>-path</code> parameter tells the function the path to create. <code>-path</code> is also b... | <p>PowerShell does its best to determine what parameter you mean even if you don't give it fully. Thus if you use the <code>-p</code> parameter, you are actually using <code>-path</code>.</p> <p>For the mkdir function, the <code>-path</code> parameter tells the function the path to create. <code>-path</code> is also b... | 526, 1231 | command-line, powershell | <h1>Difference between mkdir and mkdir -p?</h1>
<p>I've been following Learn Code the Hard Way's tutorial on learning how to utilize the command line interface in PowerShell. In <a href="http://cli.learncodethehardway.org/book/cli-crash-coursech8.html">this</a> article, it tells me to use the command <code>mkdir -p i\l... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,205 | bash | # Difference between mkdir and mkdir -p?
I've been following Learn Code the Hard Way's tutorial on learning how to utilize the command line interface in PowerShell. In [this](http://cli.learncodethehardway.org/book/cli-crash-coursech8.html) article, it tells me to use the command `mkdir -p i\like\icecream`. At the bot... | PowerShell does its best to determine what parameter you mean even if you don't give it fully. Thus if you use the `-p` parameter, you are actually using `-path`.
For the mkdir function, the `-path` parameter tells the function the path to create. `-path` is also by default the first argument to the function if no exp... |
10129747 | Conditional trailing space with bash programmable completion | 12 | 2012-04-12 18:40:51 | <p>I'm creating a function to provide programmable completion for a command that I use (with much help from <a href="http://www.debian-administration.org/articles/317" rel="noreferrer">http://www.debian-administration.org/articles/317</a>). The shell script usage is as follows:</p>
<pre><code>script.sh command [comman... | 1,894 | 920,824 | 2012-04-12 18:55:24 | 10,129,950 | 15 | 2012-04-12 18:55:24 | 1,054,459 | 2012-04-12 18:55:24 | https://stackoverflow.com/q/10129747 | https://stackoverflow.com/a/10129950 | <p>First you need to add = to the COMPREPLY:</p>
<pre><code>COMPREPLY=( $(compgen -W "--a_foo= --b_foo=" -- ${cur}) )
</code></pre>
<p>next you need to tell completion not to add space after = with</p>
<pre><code>compopt -o nospace
</code></pre>
<p>So, you script lines should be:</p>
<pre><code>foo)
COMPREPLY=( ... | <p>First you need to add = to the COMPREPLY:</p> <pre><code>COMPREPLY=( $(compgen -W "--a_foo= --b_foo=" -- ${cur}) ) </code></pre> <p>next you need to tell completion not to add space after = with</p> <pre><code>compopt -o nospace </code></pre> <p>So, you script lines should be:</p> <pre><code>foo) COMPREPLY=( ... | 387, 59778 | bash, bash-completion | <h1>Conditional trailing space with bash programmable completion</h1>
<p>I'm creating a function to provide programmable completion for a command that I use (with much help from <a href="http://www.debian-administration.org/articles/317" rel="noreferrer">http://www.debian-administration.org/articles/317</a>). The shell... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,206 | bash | # Conditional trailing space with bash programmable completion
I'm creating a function to provide programmable completion for a command that I use (with much help from <http://www.debian-administration.org/articles/317>). The shell script usage is as follows:
```
script.sh command [command options]
```
where command... | First you need to add = to the COMPREPLY:
```
COMPREPLY=( $(compgen -W "--a_foo= --b_foo=" -- ${cur}) )
```
next you need to tell completion not to add space after = with
```
compopt -o nospace
```
So, you script lines should be:
```
foo)
COMPREPLY=( $(compgen -W "--a_foo= --b_foo=" -- ${cur}) ); compopt -o nosp... |
8849681 | Bash join command | 12 | 2012-01-13 11:13:01 | <p>Infile1:</p>
<pre><code>1 a
3 c
4 d
6 f
</code></pre>
<p>Infile2:</p>
<pre><code>1 a
2 b
5 e
6 f
7 g
8 h
</code></pre>
<p>How do I join these files with the unix join command to get this output:</p>
<pre><code>1 aa
2 b
3 c
4 d
5 e
6 ff
7 g
8 h
</code></pre>
<p>Dogbanes answer worked but...
when I apply dogba... | 52,316 | 1,045,523 | 2012-01-13 15:49:20 | 8,849,764 | 15 | 2012-01-13 11:20:22 | 7,412 | 2012-01-13 11:20:22 | https://stackoverflow.com/q/8849681 | https://stackoverflow.com/a/8849764 | <p>First <code>sort</code> both files. Then use <code>join</code> to join on the first field of both files. You also need to pipe the output through <code>sed</code> if you want to remove the space and thus convert <code>a a</code> into <code>aa</code>. This is shown below:</p>
<pre><code>$ join -t " " -1 1 -2 1 -a 1 ... | <p>First <code>sort</code> both files. Then use <code>join</code> to join on the first field of both files. You also need to pipe the output through <code>sed</code> if you want to remove the space and thus convert <code>a a</code> into <code>aa</code>. This is shown below:</p> <pre><code>$ join -t " " -1 1 -2 1 -a 1 ... | 34, 58, 387, 3626 | bash, join, linux, unix | <h1>Bash join command</h1>
<p>Infile1:</p>
<pre><code>1 a
3 c
4 d
6 f
</code></pre>
<p>Infile2:</p>
<pre><code>1 a
2 b
5 e
6 f
7 g
8 h
</code></pre>
<p>How do I join these files with the unix join command to get this output:</p>
<pre><code>1 aa
2 b
3 c
4 d
5 e
6 ff
7 g
8 h
</code></pre>
<p>Dogbanes answer worke... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,207 | bash | # Bash join command
Infile1:
```
1 a
3 c
4 d
6 f
```
Infile2:
```
1 a
2 b
5 e
6 f
7 g
8 h
```
How do I join these files with the unix join command to get this output:
```
1 aa
2 b
3 c
4 d
5 e
6 ff
7 g
8 h
```
Dogbanes answer worked but...
when I apply dogbanes answer on this file:
```
27 27
28 22
29 37
30 ... | First `sort` both files. Then use `join` to join on the first field of both files. You also need to pipe the output through `sed` if you want to remove the space and thus convert `a a` into `aa`. This is shown below:
```
$ join -t " " -1 1 -2 1 -a 1 -a 2 <(sort file1) <(sort file2) | sed 's/ \([a-z]\) / \1/g'
1 aa
2 ... |
8378232 | How do I call a local shell script from a web server? | 12 | 2011-12-04 20:06:41 | <p>I am running Ubuntu 11 and I would like to setup a simple webserver that responds to an http request by calling a local script with the GET or POST parameters. This script (already written) does some stuff and creates a file. This file should be made available at a URL, and the webserver should then make an http re... | 45,067 | 304,658 | 2017-06-08 00:00:29 | 8,378,332 | 15 | 2011-12-04 20:23:29 | 1,074,592 | 2011-12-04 20:23:29 | https://stackoverflow.com/q/8378232 | https://stackoverflow.com/a/8378332 | <p><a href="http://www.cyberciti.biz/faq/run-shell-script-from-web-page/" rel="noreferrer">This tutorial looks good</a>, but it's a bit brief.</p>
<p>I have apache installed. If you don't: <code>sudo apt-get install apache2</code>.</p>
<pre><code>cd /usr/lib/cgi-bin
# Make a file and let everyone execute it
sudo to... | <p><a href="http://www.cyberciti.biz/faq/run-shell-script-from-web-page/" rel="noreferrer">This tutorial looks good</a>, but it's a bit brief.</p> <p>I have apache installed. If you don't: <code>sudo apt-get install apache2</code>.</p> <pre><code>cd /usr/lib/cgi-bin # Make a file and let everyone execute it sudo to... | 80, 390, 549, 1074, 6605 | apache, nginx, shell, ubuntu, webserver | <h1>How do I call a local shell script from a web server?</h1>
<p>I am running Ubuntu 11 and I would like to setup a simple webserver that responds to an http request by calling a local script with the GET or POST parameters. This script (already written) does some stuff and creates a file. This file should be made av... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,208 | bash | # How do I call a local shell script from a web server?
I am running Ubuntu 11 and I would like to setup a simple webserver that responds to an http request by calling a local script with the GET or POST parameters. This script (already written) does some stuff and creates a file. This file should be made available at... | [This tutorial looks good](http://www.cyberciti.biz/faq/run-shell-script-from-web-page/), but it's a bit brief.
I have apache installed. If you don't: `sudo apt-get install apache2`.
```
cd /usr/lib/cgi-bin
# Make a file and let everyone execute it
sudo touch test.sh && chmod a+x test.sh
```
Then put the some code ... |
7799045 | Best way to capture output from system command to a text file? | 12 | 2011-10-17 20:17:23 | <p>I’m trying to capture output from using Perl’s <code>system</code> function to execute and redirect a system command’s ouptut to a file, but for some reason I’m not getting the whole output.</p>
<p>I’m using the following method:</p>
<pre><code>system("example.exe >output.txt");
</code></pre>
<p>What’s wrong w... | 43,804 | 965,772 | 2015-12-11 07:43:03 | 7,801,293 | 15 | 2011-10-18 00:48:24 | 468,327 | 2011-10-18 11:36:22 | https://stackoverflow.com/q/7799045 | https://stackoverflow.com/a/7801293 | <p>Same as <a href="https://stackoverflow.com/q/7799045#7799174">MVS's answer</a>, but modern and safe.</p>
<pre><code>use strict;
use warnings;
open (my $file, '>', 'output.txt') or die "Could not open file: $!";
my $output = `example.exe`;
die "$!" if $?;
print $file $output;
</code></pre>
<p>easier</p>
<pre... | <p>Same as <a href="https://stackoverflow.com/q/7799045#7799174">MVS's answer</a>, but modern and safe.</p> <pre><code>use strict; use warnings; open (my $file, '>', 'output.txt') or die "Could not open file: $!"; my $output = `example.exe`; die "$!" if $?; print $file $output; </code></pre> <p>easier</p> <pre... | 390, 580, 5163, 7932, 26698 | exec, io-redirection, perl, shell, system | <h1>Best way to capture output from system command to a text file?</h1>
<p>I’m trying to capture output from using Perl’s <code>system</code> function to execute and redirect a system command’s ouptut to a file, but for some reason I’m not getting the whole output.</p>
<p>I’m using the following method:</p>
<pre><cod... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,209 | bash | # Best way to capture output from system command to a text file?
I’m trying to capture output from using Perl’s `system` function to execute and redirect a system command’s ouptut to a file, but for some reason I’m not getting the whole output.
I’m using the following method:
```
system("example.exe >output.txt");
`... | Same as [MVS's answer](https://stackoverflow.com/q/7799045#7799174), but modern and safe.
```
use strict;
use warnings;
open (my $file, '>', 'output.txt') or die "Could not open file: $!";
my $output = `example.exe`;
die "$!" if $?;
print $file $output;
```
easier
```
use strict;
use warnings;
use autodie;
open... |
6049323 | How do I edit XML using Powershell? | 12 | 2011-05-18 18:26:33 | <p>I'm trying to edit some xml in Powershell. Here's what I'm doing:</p>
<pre><code>$path = 'C:\Projects\NuGetTestPackage\NuGetTestPackage'
$projName = 'NuGetTestPackage1.csproj'
cd $path
$file = gi $projName
$pattern = 'TextTemplatingFileGenerator'
$xml = [xml](gc $file)
$node = [xml] $xml.Project.ItemGroup.None.Gene... | 13,320 | 441,862 | 2011-05-19 23:50:00 | 6,050,539 | 15 | 2011-05-18 20:19:25 | 153,982 | 2011-05-19 23:50:00 | https://stackoverflow.com/q/6049323 | https://stackoverflow.com/a/6050539 | <p>This is happening because you have more than one "ItemGroup" element and more than one "None" element. At that point, ItemGroup is a collection and doesn't have a ".None" property. You'd be better off using XPath IMO e.g.:</p>
<pre><code>$ns = @{msb = 'http://schemas.microsoft.com/developer/msbuild/2003'}
$patter... | <p>This is happening because you have more than one "ItemGroup" element and more than one "None" element. At that point, ItemGroup is a collection and doesn't have a ".None" property. You'd be better off using XPath IMO e.g.:</p> <pre><code>$ns = @{msb = 'http://schemas.microsoft.com/developer/msbuild/2003'} $patter... | 19, 526 | powershell, xml | <h1>How do I edit XML using Powershell?</h1>
<p>I'm trying to edit some xml in Powershell. Here's what I'm doing:</p>
<pre><code>$path = 'C:\Projects\NuGetTestPackage\NuGetTestPackage'
$projName = 'NuGetTestPackage1.csproj'
cd $path
$file = gi $projName
$pattern = 'TextTemplatingFileGenerator'
$xml = [xml](gc $file)
$... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,210 | bash | # How do I edit XML using Powershell?
I'm trying to edit some xml in Powershell. Here's what I'm doing:
```
$path = 'C:\Projects\NuGetTestPackage\NuGetTestPackage'
$projName = 'NuGetTestPackage1.csproj'
cd $path
$file = gi $projName
$pattern = 'TextTemplatingFileGenerator'
$xml = [xml](gc $file)
$node = [xml] $xml.Pr... | This is happening because you have more than one "ItemGroup" element and more than one "None" element. At that point, ItemGroup is a collection and doesn't have a ".None" property. You'd be better off using XPath IMO e.g.:
```
$ns = @{msb = 'http://schemas.microsoft.com/developer/msbuild/2003'}
$pattern = 'TextTemplat... |
5954503 | Powershell hashtable does not write to file as expected - receive only "System.Collections" rows | 12 | 2011-05-10 18:14:56 | <p>Can someone please explain <strong><em>Why</em></strong> my first examples don't work, and why adding in a ForEach-Object solves the problem? Thanks in advance!</p>
<hr>
<p>I parsed the return from a command into a hashtable (sample at end of post) and want to log the information to a file as part of my processin... | 45,760 | 594,373 | 2024-04-25 04:54:16 | 5,956,155 | 15 | 2011-05-10 20:36:40 | 75,224 | 2011-05-10 20:36:40 | https://stackoverflow.com/q/5954503 | https://stackoverflow.com/a/5956155 | <p>Answering the <strong>why</strong> part, you obviously have a solution :)</p>
<p>In your first example</p>
<pre><code>$ht | Add-Content log.txt
</code></pre>
<p>PowerShell takes <code>$ht</code> and tries to somehow convert it to a string so that it can be stored via <code>Add-Content</code>. Because there is no ... | <p>Answering the <strong>why</strong> part, you obviously have a solution :)</p> <p>In your first example</p> <pre><code>$ht | Add-Content log.txt </code></pre> <p>PowerShell takes <code>$ht</code> and tries to somehow convert it to a string so that it can be stored via <code>Add-Content</code>. Because there is no ... | 526, 5189 | hashtable, powershell | <h1>Powershell hashtable does not write to file as expected - receive only "System.Collections" rows</h1>
<p>Can someone please explain <strong><em>Why</em></strong> my first examples don't work, and why adding in a ForEach-Object solves the problem? Thanks in advance!</p>
<hr>
<p>I parsed the return from a command ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,211 | bash | # Powershell hashtable does not write to file as expected - receive only "System.Collections" rows
Can someone please explain ***Why*** my first examples don't work, and why adding in a ForEach-Object solves the problem? Thanks in advance!
---
I parsed the return from a command into a hashtable (sample at end of pos... | Answering the **why** part, you obviously have a solution :)
In your first example
```
$ht | Add-Content log.txt
```
PowerShell takes `$ht` and tries to somehow convert it to a string so that it can be stored via `Add-Content`. Because there is no conversion defined for the hashtable, only the type name is returned ... |
5550895 | Shell script changing desktop wallpaper | 12 | 2011-04-05 11:13:05 | <p>Could you write the easiest possible shell script that will change the desktop wallpaper (in Ubuntu) in regular intervals (e.g. 1 minute).</p>
<p>Wallpapers will be saved in particular directory (e.g. $HOME/wallpapers).
I need only basic functionality.</p>
<p>1) select random wallpaper from <code>$HOME/wallpapers<... | 35,350 | 653,379 | 2023-05-23 22:20:16 | 5,551,080 | 15 | 2011-04-05 11:29:16 | 531,222 | 2011-04-05 12:24:05 | https://stackoverflow.com/q/5550895 | https://stackoverflow.com/a/5551080 | <pre><code>#!/bin/bash
wallpaperdir='$HOME/wallpaper'
files=($wallpaperdir/*)
randompic=`printf "%s\n" "${files[RANDOM % ${#files[@]}]}"`
gconftool-2 -t str --set /desktop/gnome/background/picture_filename "$randompic"
</code></pre>
<p>Save this script and edit your with the command "crontab -e" (it launches an edit... | <pre><code>#!/bin/bash wallpaperdir='$HOME/wallpaper' files=($wallpaperdir/*) randompic=`printf "%s\n" "${files[RANDOM % ${#files[@]}]}"` gconftool-2 -t str --set /desktop/gnome/background/picture_filename "$randompic" </code></pre> <p>Save this script and edit your with the command "crontab -e" (it launches an edit... | 387, 390, 3294, 9519 | bash, gnome, shell, wallpaper | <h1>Shell script changing desktop wallpaper</h1>
<p>Could you write the easiest possible shell script that will change the desktop wallpaper (in Ubuntu) in regular intervals (e.g. 1 minute).</p>
<p>Wallpapers will be saved in particular directory (e.g. $HOME/wallpapers).
I need only basic functionality.</p>
<p>1) sel... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,212 | bash | # Shell script changing desktop wallpaper
Could you write the easiest possible shell script that will change the desktop wallpaper (in Ubuntu) in regular intervals (e.g. 1 minute).
Wallpapers will be saved in particular directory (e.g. $HOME/wallpapers).
I need only basic functionality.
1) select random wallpaper fr... | ```
#!/bin/bash
wallpaperdir='$HOME/wallpaper'
files=($wallpaperdir/*)
randompic=`printf "%s\n" "${files[RANDOM % ${#files[@]}]}"`
gconftool-2 -t str --set /desktop/gnome/background/picture_filename "$randompic"
```
Save this script and edit your with the command "crontab -e" (it launches an editor where you put thi... |
5101506 | How does shell execute piped commands? | 12 | 2011-02-24 07:08:52 | <p>I want to understand that how does shell executes piped commands ? e.g. cat | more. I am aware that for executing a normal command shell does a fork, execute it and then child returns. But how does shell internally handle the execution of piped commands ?</p>
| 3,797 | 248,132 | 2011-02-24 07:46:29 | 5,101,657 | 15 | 2011-02-24 07:30:36 | 265,804 | 2011-02-24 07:46:29 | https://stackoverflow.com/q/5101506 | https://stackoverflow.com/a/5101657 | <p>Considering for example <code>cat | grep</code>, the shell first forks itself to start <code>cat</code>, and then forks itself once more to start <code>grep</code>.</p>
<p>Before calling one of the <code>exec*</code> family of functions in the two newly created processes to start the two programs, the tricky part i... | <p>Considering for example <code>cat | grep</code>, the shell first forks itself to start <code>cat</code>, and then forks itself once more to start <code>grep</code>.</p> <p>Before calling one of the <code>exec*</code> family of functions in the two newly created processes to start the two programs, the tricky part i... | 34, 390 | shell, unix | <h1>How does shell execute piped commands?</h1>
<p>I want to understand that how does shell executes piped commands ? e.g. cat | more. I am aware that for executing a normal command shell does a fork, execute it and then child returns. But how does shell internally handle the execution of piped commands ?</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,213 | bash | # How does shell execute piped commands?
I want to understand that how does shell executes piped commands ? e.g. cat | more. I am aware that for executing a normal command shell does a fork, execute it and then child returns. But how does shell internally handle the execution of piped commands ? | Considering for example `cat | grep`, the shell first forks itself to start `cat`, and then forks itself once more to start `grep`.
Before calling one of the `exec*` family of functions in the two newly created processes to start the two programs, the tricky part is setting up the pipe and redirecting the descriptors.... |
4834353 | What is up with [A-Z] meaning [A-Za-z]? | 12 | 2011-01-29 00:43:55 | <p>I've noticed for a while now that, on some of the Unix-based systems I use at least, <code>ls [A-Z]*</code> has been giving me the results I would anticipate from <code>ls [A-Za-z]*</code>, leaving me unable to easily get a list of just the goddamned files that start with capital letters. I just now ran into the sa... | 5,121 | 47,529 | 2011-01-29 01:47:45 | 4,834,363 | 15 | 2011-01-29 00:47:06 | 20,862 | 2011-01-29 00:47:06 | https://stackoverflow.com/q/4834353 | https://stackoverflow.com/a/4834363 | <p>It's actually <code>[A-Za-y]</code>, and it has to do with language collation. If you want to override it then set <code>$LC_COLLATE</code> appropriately; either of <code>C</code> or <code>POSIX</code> should do.</p>
| <p>It's actually <code>[A-Za-y]</code>, and it has to do with language collation. If you want to override it then set <code>$LC_COLLATE</code> appropriately; either of <code>C</code> or <code>POSIX</code> should do.</p> | 18, 34, 58, 390, 1271 | grep, linux, regex, shell, unix | <h1>What is up with [A-Z] meaning [A-Za-z]?</h1>
<p>I've noticed for a while now that, on some of the Unix-based systems I use at least, <code>ls [A-Z]*</code> has been giving me the results I would anticipate from <code>ls [A-Za-z]*</code>, leaving me unable to easily get a list of just the goddamned files that start ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,214 | bash | # What is up with [A-Z] meaning [A-Za-z]?
I've noticed for a while now that, on some of the Unix-based systems I use at least, `ls [A-Z]*` has been giving me the results I would anticipate from `ls [A-Za-z]*`, leaving me unable to easily get a list of just the goddamned files that start with capital letters. I just no... | It's actually `[A-Za-y]`, and it has to do with language collation. If you want to override it then set `$LC_COLLATE` appropriately; either of `C` or `POSIX` should do. |
4009154 | PowerShell ForEach / Piping confusion | 12 | 2010-10-24 16:33:14 | <p>I am using the TFS PowerTools Cmdlets in PowerShell to try to get at some information about Changesets and related WorkItems from my server. I have boiled the problem down to behavior I don't understand and I am hoping it is not TFS specific (so someone out there might be able to explain the problem to me :) )</p>
... | 39,286 | 485,693 | 2010-10-24 17:26:07 | 4,009,430 | 15 | 2010-10-24 17:26:07 | 153,982 | 2010-10-24 17:26:07 | https://stackoverflow.com/q/4009154 | https://stackoverflow.com/a/4009430 | <p>This is indeed confusing. For now a work-around is to grab the items like so:</p>
<pre><code>$items = @(Get-TfsItemHistory . -r -Stopafter 25 |
Foreach {$_.WorkItems.Count > $null; $_})
</code></pre>
<p>This accesses the WorkItems collection which seems to cause this property to be populated (I kno... | <p>This is indeed confusing. For now a work-around is to grab the items like so:</p> <pre><code>$items = @(Get-TfsItemHistory . -r -Stopafter 25 | Foreach {$_.WorkItems.Count > $null; $_}) </code></pre> <p>This accesses the WorkItems collection which seems to cause this property to be populated (I kno... | 526, 631, 19486 | foreach, piping, powershell | <h1>PowerShell ForEach / Piping confusion</h1>
<p>I am using the TFS PowerTools Cmdlets in PowerShell to try to get at some information about Changesets and related WorkItems from my server. I have boiled the problem down to behavior I don't understand and I am hoping it is not TFS specific (so someone out there might ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,215 | bash | # PowerShell ForEach / Piping confusion
I am using the TFS PowerTools Cmdlets in PowerShell to try to get at some information about Changesets and related WorkItems from my server. I have boiled the problem down to behavior I don't understand and I am hoping it is not TFS specific (so someone out there might be able t... | This is indeed confusing. For now a work-around is to grab the items like so:
```
$items = @(Get-TfsItemHistory . -r -Stopafter 25 |
Foreach {$_.WorkItems.Count > $null; $_})
```
This accesses the WorkItems collection which seems to cause this property to be populated (I know - WTF?). I tend to use `@()` ... |
3983215 | PowerShell CmdLet as Visual Studio External Tool | 12 | 2010-10-20 23:48:11 | <p>I am attempting to add a PowerShell cmdlet as an external tool in Visual Studio 2010, but whenever I call the external tool I get:</p>
<blockquote>
<p>{foo} cannot be loaded because the
execution of scripts is disabled on
this system. Please see "get-help
about_signing" for more details.</p>
</blockquote>
... | 3,104 | 143,327 | 2010-10-21 02:22:04 | 3,983,376 | 15 | 2010-10-21 00:26:15 | 153,982 | 2010-10-21 02:22:04 | https://stackoverflow.com/q/3983215 | https://stackoverflow.com/a/3983376 | <p>Are you running on a x64 system? If so, you have to set the execution for both x86 and x64 PowerShell. You can also pass the ExecutionPolicy directly as a parameter to Powershell (2.0) via the command line:</p>
<pre><code>powershell.exe -ExecutionPolicy RemoteSigned -Command "&{ foo }"
</code></pre>
| <p>Are you running on a x64 system? If so, you have to set the execution for both x86 and x64 PowerShell. You can also pass the ExecutionPolicy directly as a parameter to Powershell (2.0) via the command line:</p> <pre><code>powershell.exe -ExecutionPolicy RemoteSigned -Command "&{ foo }" </code></pre> | 526, 14456 | powershell, visual-studio-2010 | <h1>PowerShell CmdLet as Visual Studio External Tool</h1>
<p>I am attempting to add a PowerShell cmdlet as an external tool in Visual Studio 2010, but whenever I call the external tool I get:</p>
<blockquote>
<p>{foo} cannot be loaded because the
execution of scripts is disabled on
this system. Please see "get-h... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,216 | bash | # PowerShell CmdLet as Visual Studio External Tool
I am attempting to add a PowerShell cmdlet as an external tool in Visual Studio 2010, but whenever I call the external tool I get:
> {foo} cannot be loaded because the
> execution of scripts is disabled on
> this system. Please see "get-help
> about_signing" for more... | Are you running on a x64 system? If so, you have to set the execution for both x86 and x64 PowerShell. You can also pass the ExecutionPolicy directly as a parameter to Powershell (2.0) via the command line:
```
powershell.exe -ExecutionPolicy RemoteSigned -Command "&{ foo }"
``` |
2721946 | Cross-platform getopt for a shell script | 12 | 2010-04-27 14:19:09 | <p>I've just found out that <code>getopt</code> is not cross-platform (in particular for FreeBSD and Linux). What is the best workaround for this issue?</p>
| 12,281 | 268,224 | 2015-10-16 17:55:05 | 2,728,625 | 15 | 2010-04-28 10:30:31 | 26,428 | 2015-10-16 17:55:05 | https://stackoverflow.com/q/2721946 | https://stackoverflow.com/a/2728625 | <p>Use <code>getopts</code> (with an "s").</p>
<p>According to <a href="http://mywiki.wooledge.org/BashFAQ/035" rel="noreferrer">Bash FAQ 35</a>:</p>
<blockquote>
<p>Unless it's the version from util-linux, and you use its advanced mode, never use getopt(1). getopt cannot handle empty arguments strings, or ar... | <p>Use <code>getopts</code> (with an "s").</p> <p>According to <a href="http://mywiki.wooledge.org/BashFAQ/035" rel="noreferrer">Bash FAQ 35</a>:</p> <blockquote> <p>Unless it's the version from util-linux, and you use its advanced mode, never use getopt(1). getopt cannot handle empty arguments strings, or ar... | 387, 390, 3285, 10831 | bash, cross-platform, getopt, shell | <h1>Cross-platform getopt for a shell script</h1>
<p>I've just found out that <code>getopt</code> is not cross-platform (in particular for FreeBSD and Linux). What is the best workaround for this issue?</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,217 | bash | # Cross-platform getopt for a shell script
I've just found out that `getopt` is not cross-platform (in particular for FreeBSD and Linux). What is the best workaround for this issue? | Use `getopts` (with an "s").
According to [Bash FAQ 35](http://mywiki.wooledge.org/BashFAQ/035):
> Unless it's the version from util-linux, and you use its advanced mode, never use getopt(1). getopt cannot handle empty arguments strings, or arguments with embedded whitespace. Please forget that it ever existed.
>
> T... |
1973420 | Shell Script + Write to File a String | 12 | 2009-12-29 07:41:09 | <p>I have a string</p>
<p>server.ip=192.168.1.200</p>
<p>And I need to write the above statement completely into the file.</p>
<p>How can this be done?</p>
<p>This is what I'm trying to do...</p>
<pre><code>set client_config = xmlrpc_server.properties
echo 'serverurl=http://'${IP}':8000' >> %${client_config}... | 61,576 | 185,412 | 2009-12-29 14:33:23 | 1,973,492 | 15 | 2009-12-29 08:08:28 | 229,602 | 2009-12-29 08:08:28 | https://stackoverflow.com/q/1973420 | https://stackoverflow.com/a/1973492 | <p>This worked for me</p>
<pre><code>$ FOO="192.168.1.1"
$ echo "serverurl=http://$FOO:8000" >> x.conf
$ more x.conf
serverurl=http://192.168.1.1:8000
</code></pre>
<p>I'm using zsh. I verified it with bash as well. What's the problem you get when you do this?</p>
| <p>This worked for me</p> <pre><code>$ FOO="192.168.1.1" $ echo "serverurl=http://$FOO:8000" >> x.conf $ more x.conf serverurl=http://192.168.1.1:8000 </code></pre> <p>I'm using zsh. I verified it with bash as well. What's the problem you get when you do this?</p> | 390 | shell | <h1>Shell Script + Write to File a String</h1>
<p>I have a string</p>
<p>server.ip=192.168.1.200</p>
<p>And I need to write the above statement completely into the file.</p>
<p>How can this be done?</p>
<p>This is what I'm trying to do...</p>
<pre><code>set client_config = xmlrpc_server.properties
echo 'serverurl=... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,218 | bash | # Shell Script + Write to File a String
I have a string
server.ip=192.168.1.200
And I need to write the above statement completely into the file.
How can this be done?
This is what I'm trying to do...
```
set client_config = xmlrpc_server.properties
echo 'serverurl=http://'${IP}':8000' >> %${client_config}%
echo ... | This worked for me
```
$ FOO="192.168.1.1"
$ echo "serverurl=http://$FOO:8000" >> x.conf
$ more x.conf
serverurl=http://192.168.1.1:8000
```
I'm using zsh. I verified it with bash as well. What's the problem you get when you do this? |
1493771 | Looking for a PowerShell script to compare two folders recursively | 12 | 2009-09-29 16:56:55 | <p>Just thought it would be nice to have one but my PS skills are not up to task. Anybody can share theirs?</p>
| 11,787 | 58,463 | 2009-09-29 17:06:49 | 1,493,820 | 15 | 2009-09-29 17:06:49 | 67,392 | 2009-09-29 17:06:49 | https://stackoverflow.com/q/1493771 | https://stackoverflow.com/a/1493820 | <p>Easy enough to do something simple:</p>
<pre><code>$d1 = get-childitem -path $dir1 -recurse
$d2 = get-childitem -path $dir2 -recurse
compare-object $d1 $d2
</code></pre>
<p>More sophistication required depending on the definition of difference.</p>
| <p>Easy enough to do something simple:</p> <pre><code>$d1 = get-childitem -path $dir1 -recurse $d2 = get-childitem -path $dir2 -recurse compare-object $d1 $d2 </code></pre> <p>More sophistication required depending on the definition of difference.</p> | 526 | powershell | <h1>Looking for a PowerShell script to compare two folders recursively</h1>
<p>Just thought it would be nice to have one but my PS skills are not up to task. Anybody can share theirs?</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,219 | bash | # Looking for a PowerShell script to compare two folders recursively
Just thought it would be nice to have one but my PS skills are not up to task. Anybody can share theirs? | Easy enough to do something simple:
```
$d1 = get-childitem -path $dir1 -recurse
$d2 = get-childitem -path $dir2 -recurse
compare-object $d1 $d2
```
More sophistication required depending on the definition of difference. |
399734 | Input from within shell script | 12 | 2008-12-30 07:45:17 | <p>I have a script that calls an application that requires user input, e.g. run app that requires user to type in 'Y' or 'N'.<br>
How can I get the shell script not to ask the user for the input but rather use the value from a predefined variable in the script?</p>
<p>In my case there will be two questions that requir... | 13,035 | null | 2014-07-29 03:29:08 | 399,736 | 15 | 2008-12-30 07:48:12 | 27,020 | 2008-12-30 07:48:12 | https://stackoverflow.com/q/399734 | https://stackoverflow.com/a/399736 | <p>You can pipe in whatever text you'd like on stdin and it will be just the same as having the user type it themselves. For example to simulating typing "Y" just use:</p>
<pre><code>echo "Y" | myapp
</code></pre>
<p>or using a shell variable:</p>
<pre><code>echo $ANSWER | myapp
</code></pre>
<p>There is also a un... | <p>You can pipe in whatever text you'd like on stdin and it will be just the same as having the user type it themselves. For example to simulating typing "Y" just use:</p> <pre><code>echo "Y" | myapp </code></pre> <p>or using a shell variable:</p> <pre><code>echo $ANSWER | myapp </code></pre> <p>There is also a un... | 390 | shell | <h1>Input from within shell script</h1>
<p>I have a script that calls an application that requires user input, e.g. run app that requires user to type in 'Y' or 'N'.<br>
How can I get the shell script not to ask the user for the input but rather use the value from a predefined variable in the script?</p>
<p>In my case... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,220 | bash | # Input from within shell script
I have a script that calls an application that requires user input, e.g. run app that requires user to type in 'Y' or 'N'.
How can I get the shell script not to ask the user for the input but rather use the value from a predefined variable in the script?
In my case there will be two... | You can pipe in whatever text you'd like on stdin and it will be just the same as having the user type it themselves. For example to simulating typing "Y" just use:
```
echo "Y" | myapp
```
or using a shell variable:
```
echo $ANSWER | myapp
```
There is also a unix command called "yes" that outputs a continuous st... |
317733 | trying to capture javac output in bash shell | 12 | 2008-11-25 15:35:22 | <p>I'm trying to redirect the java compiler output to a file.
I thought it's supposed to be:</p>
<pre><code>javac file.java > log.txt
</code></pre>
<p>or something. Instead, I see all the output on the terminal and nothing in log.txt!</p>
<p>Also, if I want to log errors too, do I do</p>
<pre><code>javac file.j... | 8,503 | 31,301 | 2024-01-10 09:42:12 | 317,752 | 15 | 2008-11-25 15:41:53 | 40,111 | 2008-11-25 15:41:53 | https://stackoverflow.com/q/317733 | https://stackoverflow.com/a/317752 | <pre><code>javac file.java 2> log.txt
</code></pre>
<p>The reason is that you have <em>two</em> output file descriptors instead of one. The usual one is stdout, which you can redirect with > and it's supposed to be used for resulting output. The second one, stderr, is meant for human readable output like warnings, ... | <pre><code>javac file.java 2> log.txt </code></pre> <p>The reason is that you have <em>two</em> output file descriptors instead of one. The usual one is stdout, which you can redirect with > and it's supposed to be used for resulting output. The second one, stderr, is meant for human readable output like warnings, ... | 387, 390, 7427 | bash, javac, shell | <h1>trying to capture javac output in bash shell</h1>
<p>I'm trying to redirect the java compiler output to a file.
I thought it's supposed to be:</p>
<pre><code>javac file.java > log.txt
</code></pre>
<p>or something. Instead, I see all the output on the terminal and nothing in log.txt!</p>
<p>Also, if I want t... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,221 | bash | # trying to capture javac output in bash shell
I'm trying to redirect the java compiler output to a file.
I thought it's supposed to be:
```
javac file.java > log.txt
```
or something. Instead, I see all the output on the terminal and nothing in log.txt!
Also, if I want to log errors too, do I do
```
javac file.ja... | ```
javac file.java 2> log.txt
```
The reason is that you have *two* output file descriptors instead of one. The usual one is stdout, which you can redirect with > and it's supposed to be used for resulting output. The second one, stderr, is meant for human readable output like warnings, errors, current status etc., t... |
53346274 | Exactly what cases does the gcc execstack flag allow and how does it enforce it? | 11 | 2018-11-16 22:31:28 | <p>I have some example code here which I'm using to understand some C behaviour for a beginner's CTF:</p>
<pre><code>// example.c
#include <stdio.h>
void main() {
void (*print)();
print = getenv("EGG");
print();
}
</code></pre>
<p>Compile: <code>gcc -z execstack -g -m32 -o example ex... | 5,682 | 2,929,228 | 2022-03-28 00:32:11 | 53,346,420 | 15 | 2018-11-16 22:51:34 | 224,132 | 2022-03-28 00:32:11 | https://stackoverflow.com/q/53346274 | https://stackoverflow.com/a/53346420 | <p><strong><code>getenv</code> doesn't <em>store</em> the env var's value on the stack. It's <em>already</em> on the stack from process startup, and <code>getenv</code> obtains a pointer to it.</strong></p>
<p>See the i386 System V ABI's description of where argv[] and envp[] are located at process startup: above <cod... | <p><strong><code>getenv</code> doesn't <em>store</em> the env var's value on the stack. It's <em>already</em> on the stack from process startup, and <code>getenv</code> obtains a pointer to it.</strong></p> <p>See the i386 System V ABI's description of where argv[] and envp[] are located at process startup: above <cod... | 8, 58, 823, 1477, 78469 | c, gcc, linux, shellcode, x86 | <h1>Exactly what cases does the gcc execstack flag allow and how does it enforce it?</h1>
<p>I have some example code here which I'm using to understand some C behaviour for a beginner's CTF:</p>
<pre><code>// example.c
#include <stdio.h>
void main() {
void (*print)();
print = getenv("EGG");
... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,222 | bash | # Exactly what cases does the gcc execstack flag allow and how does it enforce it?
I have some example code here which I'm using to understand some C behaviour for a beginner's CTF:
```
// example.c
#include <stdio.h>
void main() {
void (*print)();
print = getenv("EGG");
print();
}
```
Co... | **`getenv` doesn't *store* the env var's value on the stack. It's *already* on the stack from process startup, and `getenv` obtains a pointer to it.**
See the i386 System V ABI's description of where argv[] and envp[] are located at process startup: above `[esp]`.
`_start` doesn't copy them before calling `main`, jus... |
49664991 | Why am I getting "cat: write error: Broken pipe" rarely and not always | 11 | 2018-04-05 05:47:58 | <p>I am running some scripts with commands having <code>cat</code> pipelined with <code>grep</code> like:</p>
<pre><code>cat file.txt | grep "pattern"
</code></pre>
<p>Most of the times there are no problems. But sometimes I get below error:</p>
<blockquote>
<p>cat: write error: Broken pipe</p>
</blockquote>
<p>S... | 44,930 | 9,167,609 | 2020-01-31 06:09:22 | 49,665,446 | 15 | 2018-04-05 06:24:31 | 5,291,015 | 2018-04-05 09:24:39 | https://stackoverflow.com/q/49664991 | https://stackoverflow.com/a/49665446 | <p>The reason is because the pipe is closed by <code>grep</code> when it still has some data to be read from <code>cat</code>. The signal <code>SIGPIPE</code> is caught by cat and it exits.</p>
<p>What usually happens in a pipeline is the shell runs <code>cat</code> in one process and <code>grep</code> in another. The... | <p>The reason is because the pipe is closed by <code>grep</code> when it still has some data to be read from <code>cat</code>. The signal <code>SIGPIPE</code> is caught by cat and it exits.</p> <p>What usually happens in a pipeline is the shell runs <code>cat</code> in one process and <code>grep</code> in another. The... | 58, 387, 1271, 7616, 22820 | bash, broken-pipe, cat, grep, linux | <h1>Why am I getting "cat: write error: Broken pipe" rarely and not always</h1>
<p>I am running some scripts with commands having <code>cat</code> pipelined with <code>grep</code> like:</p>
<pre><code>cat file.txt | grep "pattern"
</code></pre>
<p>Most of the times there are no problems. But sometimes I get below err... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,223 | bash | # Why am I getting "cat: write error: Broken pipe" rarely and not always
I am running some scripts with commands having `cat` pipelined with `grep` like:
```
cat file.txt | grep "pattern"
```
Most of the times there are no problems. But sometimes I get below error:
> cat: write error: Broken pipe
So how do I find ... | The reason is because the pipe is closed by `grep` when it still has some data to be read from `cat`. The signal `SIGPIPE` is caught by cat and it exits.
What usually happens in a pipeline is the shell runs `cat` in one process and `grep` in another. The stdout of `cat` is connected to the write-end of the pipe and st... |
32062159 | How retrieve the creation date of photos with a script | 11 | 2015-08-18 01:26:51 | <p>What I want to do is reorganize files in my Camera Roll folder. Using the creation date I want to Put them inside folders according to Year/Month Format using their creation date.</p>
<p>In this answer, they explain how to make folders and organize them:
<a href="https://stackoverflow.com/a/1314394/4980886">https:/... | 18,266 | 4,980,886 | 2022-01-07 15:51:38 | 48,065,212 | 15 | 2018-01-02 17:20:48 | 2,154,510 | 2019-03-13 16:22:06 | https://stackoverflow.com/q/32062159 | https://stackoverflow.com/a/48065212 | <p>According to exiftool man page '<a href="https://sno.phy.queensu.ca/~phil/exiftool/exiftool_pod.html#RENAMING-EXAMPLES" rel="noreferrer">Renaming examples</a>'</p>
<p><code>exiftool '-Directory<DateTimeOriginal' -d %Y/%m/%d "$dir"
</code></p>
<p>and if only copying is required, there is an option:</p>
<p><code... | <p>According to exiftool man page '<a href="https://sno.phy.queensu.ca/~phil/exiftool/exiftool_pod.html#RENAMING-EXAMPLES" rel="noreferrer">Renaming examples</a>'</p> <p><code>exiftool '-Directory<DateTimeOriginal' -d %Y/%m/%d "$dir" </code></p> <p>and if only copying is required, there is an option:</p> <p><code... | 218, 387, 3703, 12067 | bash, directory, exif, photos | <h1>How retrieve the creation date of photos with a script</h1>
<p>What I want to do is reorganize files in my Camera Roll folder. Using the creation date I want to Put them inside folders according to Year/Month Format using their creation date.</p>
<p>In this answer, they explain how to make folders and organize the... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,224 | bash | # How retrieve the creation date of photos with a script
What I want to do is reorganize files in my Camera Roll folder. Using the creation date I want to Put them inside folders according to Year/Month Format using their creation date.
In this answer, they explain how to make folders and organize them:
<https://stac... | According to exiftool man page '[Renaming examples](https://sno.phy.queensu.ca/~phil/exiftool/exiftool_pod.html#RENAMING-EXAMPLES)'
`exiftool '-Directory<DateTimeOriginal' -d %Y/%m/%d "$dir"`
and if only copying is required, there is an option:
`exiftool -o . '-Directory<DateTimeOriginal' -d %Y/%m/%d "$dir"`
has th... |
43686878 | Pass multiple arrays as arguments to a Bash script? | 11 | 2017-04-28 18:38:23 | <p>I've looked, but have only seen answers to one array being passed in a script. </p>
<p>I want to pass multiple arrays to a bash script that assigns them as individual variables as follows: </p>
<pre><code>./myScript.sh ${array1[@]} ${array2[@]} ${array3[@]}
</code></pre>
<p>such that: <code>var1=array1</code> and... | 6,918 | 7,938,150 | 2022-12-13 07:50:22 | 43,687,593 | 15 | 2017-04-28 19:27:24 | 14,122 | 2017-05-01 02:05:36 | https://stackoverflow.com/q/43686878 | https://stackoverflow.com/a/43687593 | <p>The shell passes a single argument vector (that is to say, a simple C array of strings) off to a program being run. This is an OS-level limitation: There <em>exists no method</em> to pass structured data between two programs (any two programs, written in any language!) in an argument list, except by encoding that st... | <p>The shell passes a single argument vector (that is to say, a simple C array of strings) off to a program being run. This is an OS-level limitation: There <em>exists no method</em> to pass structured data between two programs (any two programs, written in any language!) in an argument list, except by encoding that st... | 114, 387, 390, 1231 | arrays, bash, command-line, shell | <h1>Pass multiple arrays as arguments to a Bash script?</h1>
<p>I've looked, but have only seen answers to one array being passed in a script. </p>
<p>I want to pass multiple arrays to a bash script that assigns them as individual variables as follows: </p>
<pre><code>./myScript.sh ${array1[@]} ${array2[@]} ${array3[... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,225 | bash | # Pass multiple arrays as arguments to a Bash script?
I've looked, but have only seen answers to one array being passed in a script.
I want to pass multiple arrays to a bash script that assigns them as individual variables as follows:
```
./myScript.sh ${array1[@]} ${array2[@]} ${array3[@]}
```
such that: `var1=arr... | The shell passes a single argument vector (that is to say, a simple C array of strings) off to a program being run. This is an OS-level limitation: There *exists no method* to pass structured data between two programs (any two programs, written in any language!) in an argument list, except by encoding that structure in... |
43506421 | Create file with content in one line of bash | 11 | 2017-04-19 21:30:44 | <p>I wish to create a single file with some contents known to me.</p>
<p>How do I do this in couple lines of bash?</p>
<p>this command will be used inside of a single script, so it should create file, add text, save, and quit automatically by itself without human intervention.</p>
<p>I know that</p>
<pre><code>cat ... | 22,382 | 1,017,674 | 2024-03-06 09:54:00 | 43,506,474 | 15 | 2017-04-19 21:33:58 | 1,899,640 | 2017-04-19 21:33:58 | https://stackoverflow.com/q/43506421 | https://stackoverflow.com/a/43506474 | <p>Use a "here document":</p>
<pre><code>cat >> some.text << 'END'
some stuff here
more stuff
END
</code></pre>
<p>The delimiter (here <code>END</code>) is an arbitrary word. Quoting this delimiter after the <code><<</code> will ensure that no expansion is performed on the contents.</p>
| <p>Use a "here document":</p> <pre><code>cat >> some.text << 'END' some stuff here more stuff END </code></pre> <p>The delimiter (here <code>END</code>) is an arbitrary word. Quoting this delimiter after the <code><<</code> will ensure that no expansion is performed on the contents.</p> | 387 | bash | <h1>Create file with content in one line of bash</h1>
<p>I wish to create a single file with some contents known to me.</p>
<p>How do I do this in couple lines of bash?</p>
<p>this command will be used inside of a single script, so it should create file, add text, save, and quit automatically by itself without human ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,226 | bash | # Create file with content in one line of bash
I wish to create a single file with some contents known to me.
How do I do this in couple lines of bash?
this command will be used inside of a single script, so it should create file, add text, save, and quit automatically by itself without human intervention.
I know t... | Use a "here document":
```
cat >> some.text << 'END'
some stuff here
more stuff
END
```
The delimiter (here `END`) is an arbitrary word. Quoting this delimiter after the `<<` will ensure that no expansion is performed on the contents. |
39549106 | Git blame a list of authors in a file | 11 | 2016-09-17 16:27:40 | <p>Is there a way to find out a list of authors who edited the class in java file in repo using <code>git blame</code>? The list of authors have to be unique.</p>
<p>I have tried using the following command but it did not remove duplicates and there is word "author" in every line of output. There is no need to sort th... | 9,793 | 4,180,707 | 2021-03-12 07:55:01 | 39,549,242 | 15 | 2016-09-17 16:40:31 | 2,394,026 | 2021-03-12 07:55:01 | https://stackoverflow.com/q/39549106 | https://stackoverflow.com/a/39549242 | <p>You can add at the end of the command <code>uniq</code> to make author unique.</p>
<pre><code>git blame filename --porcelain | grep "^author " | sort -u
</code></pre>
<p><a href="http://www.linux-france.org/article/man-fr/man1/sort-1.html" rel="nofollow noreferrer">sort Documentation</a></p>
| <p>You can add at the end of the command <code>uniq</code> to make author unique.</p> <pre><code>git blame filename --porcelain | grep "^author " | sort -u </code></pre> <p><a href="http://www.linux-france.org/article/man-fr/man1/sort-1.html" rel="nofollow noreferrer">sort Documentation</a></p> | 119, 387 | bash, git | <h1>Git blame a list of authors in a file</h1>
<p>Is there a way to find out a list of authors who edited the class in java file in repo using <code>git blame</code>? The list of authors have to be unique.</p>
<p>I have tried using the following command but it did not remove duplicates and there is word "author" in ev... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,227 | bash | # Git blame a list of authors in a file
Is there a way to find out a list of authors who edited the class in java file in repo using `git blame`? The list of authors have to be unique.
I have tried using the following command but it did not remove duplicates and there is word "author" in every line of output. There i... | You can add at the end of the command `uniq` to make author unique.
```
git blame filename --porcelain | grep "^author " | sort -u
```
[sort Documentation](http://www.linux-france.org/article/man-fr/man1/sort-1.html) |
39103264 | Rename parts of file names that match a pattern | 11 | 2016-08-23 13:57:02 | <p>Say I have a list of file names like this:</p>
<pre><code>some-file.ts
my-project-service.ts
other.ts
something-my-project.ts
</code></pre>
<p>I need to change the file names that have <code>my-project</code> in them to have just that part renamed to <code>$appname$</code>. </p>
<p>So <code>my-project-ser... | 6,991 | 16,241 | 2016-08-23 21:36:18 | 39,103,500 | 15 | 2016-08-23 14:06:49 | 1,163,423 | 2016-08-23 21:36:18 | https://stackoverflow.com/q/39103264 | https://stackoverflow.com/a/39103500 | <p>Use the <code>Get-ChildItem</code> cmdlet with the <code>-recurse</code> switch to get all items recursivly from a root directory. Filter all items containing <code>my-project</code> using the <code>Where-Object</code> cmdlet and finally rename them using the <code>Rename-Item</code> cmdlet:</p>
<pre><code>Get-Chil... | <p>Use the <code>Get-ChildItem</code> cmdlet with the <code>-recurse</code> switch to get all items recursivly from a root directory. Filter all items containing <code>my-project</code> using the <code>Where-Object</code> cmdlet and finally rename them using the <code>Rename-Item</code> cmdlet:</p> <pre><code>Get-Chil... | 526, 24067 | powershell, powershell-2.0 | <h1>Rename parts of file names that match a pattern</h1>
<p>Say I have a list of file names like this:</p>
<pre><code>some-file.ts
my-project-service.ts
other.ts
something-my-project.ts
</code></pre>
<p>I need to change the file names that have <code>my-project</code> in them to have just that part renamed to ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,228 | bash | # Rename parts of file names that match a pattern
Say I have a list of file names like this:
```
some-file.ts
my-project-service.ts
other.ts
something-my-project.ts
```
I need to change the file names that have `my-project` in them to have just that part renamed to `$appname$`.
So `my-project-service.ts` woul... | Use the `Get-ChildItem` cmdlet with the `-recurse` switch to get all items recursivly from a root directory. Filter all items containing `my-project` using the `Where-Object` cmdlet and finally rename them using the `Rename-Item` cmdlet:
```
Get-ChildItem "D:\tmp" -Recurse |
Where {$_.Name -Match 'my-project'} | ... |
34437248 | Is there a better way to count occurrence of char in a string? | 11 | 2015-12-23 13:56:02 | <p>I felt there must a better way to count occurrence instead of writing a sub in perl, shell in Linux.</p>
<pre><code>#/usr/bin/perl -w
use strict;
return 1 unless $0 eq __FILE__;
main() if $0 eq __FILE__;
sub main{
my $str = "ru8xysyyyyyyysss6s5s";
my $char = "y";
my $count = count_occurrence($str, $char... | 22,575 | 5,574,689 | 2015-12-23 22:09:27 | 34,437,471 | 15 | 2015-12-23 14:09:17 | 197,758 | 2015-12-23 19:18:41 | https://stackoverflow.com/q/34437248 | https://stackoverflow.com/a/34437471 | <p>Counting the occurences of a character in a string can be performed with one line in Perl (as compared to your 4 lines). There is no need for a sub (although there is nothing wrong with encapsulating functionality in a sub). From <a href="http://perldoc.perl.org/perlfaq4.html" rel="noreferrer">perlfaq4 "How can I ... | <p>Counting the occurences of a character in a string can be performed with one line in Perl (as compared to your 4 lines). There is no need for a sub (although there is nothing wrong with encapsulating functionality in a sub). From <a href="http://perldoc.perl.org/perlfaq4.html" rel="noreferrer">perlfaq4 "How can I ... | 580, 10327 | perl, sh | <h1>Is there a better way to count occurrence of char in a string?</h1>
<p>I felt there must a better way to count occurrence instead of writing a sub in perl, shell in Linux.</p>
<pre><code>#/usr/bin/perl -w
use strict;
return 1 unless $0 eq __FILE__;
main() if $0 eq __FILE__;
sub main{
my $str = "ru8xysyyyyyyyss... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,229 | bash | # Is there a better way to count occurrence of char in a string?
I felt there must a better way to count occurrence instead of writing a sub in perl, shell in Linux.
```
#/usr/bin/perl -w
use strict;
return 1 unless $0 eq __FILE__;
main() if $0 eq __FILE__;
sub main{
my $str = "ru8xysyyyyyyysss6s5s";
my $char... | Counting the occurences of a character in a string can be performed with one line in Perl (as compared to your 4 lines). There is no need for a sub (although there is nothing wrong with encapsulating functionality in a sub). From [perlfaq4 "How can I count the number of occurrences of a substring within a string?"](htt... |
33967294 | grep each line in a file | 11 | 2015-11-28 03:18:54 | <p>I have two files: one is a fairly long collection of names (names.txt), and another file (grades.csv) which is a huge file of names and the corresponding grades. I would like to iterate over each line in names.txt and extract that name in grades.csv with the entire matching line. </p>
<p>This is how a small sample ... | 30,217 | 505,306 | 2022-05-31 16:18:21 | 33,967,443 | 15 | 2015-11-28 03:48:12 | 2,883,245 | 2015-11-28 04:18:53 | https://stackoverflow.com/q/33967294 | https://stackoverflow.com/a/33967443 | <p>I made some changes to your <code>names.txt</code> and <code>grades.csv</code> - some of the names are comma-separated and some aren't. I removed commas within quotes, so here are the new files:</p>
<pre><code>22:46 $ cat names.txt
"Dumbledore Albus"
"Potter Harry"
"Riddle Tom"
22:46 $ cat grades.csv
"Granger He... | <p>I made some changes to your <code>names.txt</code> and <code>grades.csv</code> - some of the names are comma-separated and some aren't. I removed commas within quotes, so here are the new files:</p> <pre><code>22:46 $ cat names.txt "Dumbledore Albus" "Potter Harry" "Riddle Tom" 22:46 $ cat grades.csv "Granger He... | 58, 387, 1271 | bash, grep, linux | <h1>grep each line in a file</h1>
<p>I have two files: one is a fairly long collection of names (names.txt), and another file (grades.csv) which is a huge file of names and the corresponding grades. I would like to iterate over each line in names.txt and extract that name in grades.csv with the entire matching line. </... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,230 | bash | # grep each line in a file
I have two files: one is a fairly long collection of names (names.txt), and another file (grades.csv) which is a huge file of names and the corresponding grades. I would like to iterate over each line in names.txt and extract that name in grades.csv with the entire matching line.
This is ho... | I made some changes to your `names.txt` and `grades.csv` - some of the names are comma-separated and some aren't. I removed commas within quotes, so here are the new files:
```
22:46 $ cat names.txt
"Dumbledore Albus"
"Potter Harry"
"Riddle Tom"
22:46 $ cat grades.csv
"Granger Hermione", 96.65%, 9,10
"Mcgonagall Mi... |
30106758 | Difference between braces {} and brackets () in shell scripting | 11 | 2015-05-07 16:27:43 | <p>We use braces <code>{}</code> for variable expression like</p>
<pre><code>NAME="test"
FILE_NAME=${NAME}file
</code></pre>
<p>But I don't understand in which scenarios we use brackets ()
Say <code>nslookup $(hostname)</code> works only with <code>()</code> brackets.</p>
<p>Can someone explain?</p>
| 19,760 | 1,835,315 | 2017-07-28 20:06:29 | 30,106,851 | 15 | 2015-05-07 16:32:27 | 1,022,889 | 2017-07-28 20:06:29 | https://stackoverflow.com/q/30106758 | https://stackoverflow.com/a/30106851 | <p>Minor nitpick first:</p>
<ul>
<li>Brackets <code>[]</code></li>
<li>Parentheses <code>()</code></li>
<li>Braces <code>{}</code></li>
<li>(Double) Quotation marks <code>""</code></li>
<li>(Single) Quotation marks (apostrophes) <code>''</code></li>
<li>Backticks <code>``</code> (Same as the tilde ~ key)</li>
</ul>
<... | <p>Minor nitpick first:</p> <ul> <li>Brackets <code>[]</code></li> <li>Parentheses <code>()</code></li> <li>Braces <code>{}</code></li> <li>(Double) Quotation marks <code>""</code></li> <li>(Single) Quotation marks (apostrophes) <code>''</code></li> <li>Backticks <code>``</code> (Same as the tilde ~ key)</li> </ul> <... | 390, 4358, 21252 | braces, brackets, shell | <h1>Difference between braces {} and brackets () in shell scripting</h1>
<p>We use braces <code>{}</code> for variable expression like</p>
<pre><code>NAME="test"
FILE_NAME=${NAME}file
</code></pre>
<p>But I don't understand in which scenarios we use brackets ()
Say <code>nslookup $(hostname)</code> works only with <... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,231 | bash | # Difference between braces {} and brackets () in shell scripting
We use braces `{}` for variable expression like
```
NAME="test"
FILE_NAME=${NAME}file
```
But I don't understand in which scenarios we use brackets ()
Say `nslookup $(hostname)` works only with `()` brackets.
Can someone explain? | Minor nitpick first:
- Brackets `[]`
- Parentheses `()`
- Braces `{}`
- (Double) Quotation marks `""`
- (Single) Quotation marks (apostrophes) `''`
- Backticks ``` `` ``` (Same as the tilde ~ key)
Braces are used in BASh scripts for complex variable expansion. Consider string concatenation:
```
STR="hello"
STR2=$STR... |
28813210 | Send message to a Python Script | 11 | 2015-03-02 15:17:22 | <p>I'm trying to write a little python program for shutdown or Reboot my Raspberry PI, drived by a button connected to an GPIO. The program can show the current status of the raspberry PI (Booting,Running,Halting,Rebooting) via two leds.
The python program is executed as daemon, started by a init.d bash script (written... | 11,206 | 4,623,899 | 2015-03-04 17:07:19 | 28,814,296 | 15 | 2015-03-02 16:07:53 | 419,903 | 2015-03-04 09:39:00 | https://stackoverflow.com/q/28813210 | https://stackoverflow.com/a/28814296 | <p>There are several methods to send a message from one script/app to another:</p>
<p>For you application a valid method is to use a named pipe. Create it using <a href="https://docs.python.org/2/library/os.html" rel="noreferrer">os.mkfifo</a>, open it read-only in your python app and then wait for messages on it.</p>... | <p>There are several methods to send a message from one script/app to another:</p> <p>For you application a valid method is to use a named pipe. Create it using <a href="https://docs.python.org/2/library/os.html" rel="noreferrer">os.mkfifo</a>, open it read-only in your python app and then wait for messages on it.</p>... | 16, 58, 387, 2510, 77858 | bash, daemon, linux, python, raspberry-pi | <h1>Send message to a Python Script</h1>
<p>I'm trying to write a little python program for shutdown or Reboot my Raspberry PI, drived by a button connected to an GPIO. The program can show the current status of the raspberry PI (Booting,Running,Halting,Rebooting) via two leds.
The python program is executed as daemon,... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,232 | bash | # Send message to a Python Script
I'm trying to write a little python program for shutdown or Reboot my Raspberry PI, drived by a button connected to an GPIO. The program can show the current status of the raspberry PI (Booting,Running,Halting,Rebooting) via two leds.
The python program is executed as daemon, started ... | There are several methods to send a message from one script/app to another:
For you application a valid method is to use a named pipe. Create it using [os.mkfifo](https://docs.python.org/2/library/os.html), open it read-only in your python app and then wait for messages on it.
If you want your app to do another thing... |
28749439 | Changing Windows Time and Date Format | 11 | 2015-02-26 17:54:50 | <p>I'd like to automate preferences on a Windows machine for the date and time formats used throughout the OS.</p>
<p>What PowerShell commands can I use to automate this task of changing values?</p>
<ul>
<li>short date format</li>
<li>short and long time format</li>
</ul>
<p>These <a href="https://i.sstatic.net/IL4o... | 11,023 | 23,199 | 2021-07-29 12:52:11 | 28,749,587 | 15 | 2015-02-26 18:02:12 | 4,375,845 | 2015-02-26 18:06:56 | https://stackoverflow.com/q/28749439 | https://stackoverflow.com/a/28749587 | <p>I believe the settings you are looking for are located in:</p>
<pre><code>HKEY_CURRENT_USER\Control Panel\International\sLongDate
HKEY_CURRENT_USER\Control Panel\International\sShortDate
HKEY_CURRENT_USER\Control Panel\International\sTimeFormat
HKEY_CURRENT_USER\Control Panel\International\sYearMonth
</code></pre>
... | <p>I believe the settings you are looking for are located in:</p> <pre><code>HKEY_CURRENT_USER\Control Panel\International\sLongDate HKEY_CURRENT_USER\Control Panel\International\sShortDate HKEY_CURRENT_USER\Control Panel\International\sTimeFormat HKEY_CURRENT_USER\Control Panel\International\sYearMonth </code></pre> ... | 526 | powershell | <h1>Changing Windows Time and Date Format</h1>
<p>I'd like to automate preferences on a Windows machine for the date and time formats used throughout the OS.</p>
<p>What PowerShell commands can I use to automate this task of changing values?</p>
<ul>
<li>short date format</li>
<li>short and long time format</li>
</ul... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,233 | bash | # Changing Windows Time and Date Format
I'd like to automate preferences on a Windows machine for the date and time formats used throughout the OS.
What PowerShell commands can I use to automate this task of changing values?
- short date format
- short and long time format
These [options are buried deep in Control ... | I believe the settings you are looking for are located in:
```
HKEY_CURRENT_USER\Control Panel\International\sLongDate
HKEY_CURRENT_USER\Control Panel\International\sShortDate
HKEY_CURRENT_USER\Control Panel\International\sTimeFormat
HKEY_CURRENT_USER\Control Panel\International\sYearMonth
```
So,
```
Set-ItemProper... |
28570535 | How to check if a blob already exists in Azure blob container using PowerShell | 11 | 2015-02-17 20:28:49 | <p>I have a Windows PowerShell script that uploads a file to my Azure Blob Storage.
I want the file only to upload if it doesn't already exists in the container.</p>
<p>How do I check if the blob already exists ?</p>
<p>I tired to use <a href="https://msdn.microsoft.com/en-us/library/dn806392.aspx" rel="noreferrer">G... | 20,006 | 1,720,615 | 2024-10-09 14:58:10 | 28,590,164 | 15 | 2015-02-18 17:38:22 | 1,720,615 | 2015-02-18 17:43:22 | https://stackoverflow.com/q/28570535 | https://stackoverflow.com/a/28590164 | <p>A solution is to wrap the call to <strong>Get-AzureStorageBlob</strong> in a try/catch and catch <strong><em>ResourceNotFoundException</em></strong> to determine that the blob doesn't exist.</p>
<p>And don't forget the <code>-ErrorAction Stop</code> at the end.</p>
<pre><code>try
{
$blob = Get-AzureStorageB... | <p>A solution is to wrap the call to <strong>Get-AzureStorageBlob</strong> in a try/catch and catch <strong><em>ResourceNotFoundException</em></strong> to determine that the blob doesn't exist.</p> <p>And don't forget the <code>-ErrorAction Stop</code> at the end.</p> <pre><code>try { $blob = Get-AzureStorageB... | 526, 81879 | azure-powershell, powershell | <h1>How to check if a blob already exists in Azure blob container using PowerShell</h1>
<p>I have a Windows PowerShell script that uploads a file to my Azure Blob Storage.
I want the file only to upload if it doesn't already exists in the container.</p>
<p>How do I check if the blob already exists ?</p>
<p>I tired to... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,234 | bash | # How to check if a blob already exists in Azure blob container using PowerShell
I have a Windows PowerShell script that uploads a file to my Azure Blob Storage.
I want the file only to upload if it doesn't already exists in the container.
How do I check if the blob already exists ?
I tired to use [Get-AzureStorageB... | A solution is to wrap the call to **Get-AzureStorageBlob** in a try/catch and catch ***ResourceNotFoundException*** to determine that the blob doesn't exist.
And don't forget the `-ErrorAction Stop` at the end.
```
try
{
$blob = Get-AzureStorageBlob -Blob $azureBlobName -Container $azureStorageContainer -Conte... |
28185012 | How to create tar for files older than 7 days using linux shell scripting | 11 | 2015-01-28 05:06:58 | <p>I'm writing shell script to backup files older than 7 days. Here is my code. But i'm not getting expected result. Can anyone correct me?</p>
<pre><code>#!/bin/bash
# Backup files
files=($(find /var/log/ -mtime +"7"))
for files in ${files[*]}
do
echo $files
tar cvfz backup.tar.gz $files
done
</... | 26,513 | 1,383,987 | 2021-08-18 10:35:57 | 28,185,124 | 15 | 2015-01-28 05:16:33 | 3,030,305 | 2018-09-23 05:22:03 | https://stackoverflow.com/q/28185012 | https://stackoverflow.com/a/28185124 | <p>This will work:</p>
<pre><code>#!/bin/bash
files=()
while IFS= read -r -d $'\0'; do
files+=("$REPLY")
done < <(find /var/log/ -mtime +7 -print0)
tar cvfz backup.tar.gz "${files[@]}"
</code></pre>
<p>Note the use of <code>"${files[@]}"</code> as opposed to <code>${files[*]}</code>. <code>"${files[@]}"</... | <p>This will work:</p> <pre><code>#!/bin/bash files=() while IFS= read -r -d $'\0'; do files+=("$REPLY") done < <(find /var/log/ -mtime +7 -print0) tar cvfz backup.tar.gz "${files[@]}" </code></pre> <p>Note the use of <code>"${files[@]}"</code> as opposed to <code>${files[*]}</code>. <code>"${files[@]}"</... | 58, 390 | linux, shell | <h1>How to create tar for files older than 7 days using linux shell scripting</h1>
<p>I'm writing shell script to backup files older than 7 days. Here is my code. But i'm not getting expected result. Can anyone correct me?</p>
<pre><code>#!/bin/bash
# Backup files
files=($(find /var/log/ -mtime +"7"))
for files in $... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,235 | bash | # How to create tar for files older than 7 days using linux shell scripting
I'm writing shell script to backup files older than 7 days. Here is my code. But i'm not getting expected result. Can anyone correct me?
```
#!/bin/bash
# Backup files
files=($(find /var/log/ -mtime +"7"))
for files in ${files[*]}
do
... | This will work:
```
#!/bin/bash
files=()
while IFS= read -r -d $'\0'; do
files+=("$REPLY")
done < <(find /var/log/ -mtime +7 -print0)
tar cvfz backup.tar.gz "${files[@]}"
```
Note the use of `"${files[@]}"` as opposed to `${files[*]}`. `"${files[@]}"` will expand to provide `tar` with one argument per file name ... |
22549489 | Mount an SD card manually from adb shell in android | 11 | 2014-03-21 03:17:07 | <p>I have an android 4.1 phone (Lenovo 820). After some changes aimed at partitioning the internal SD ram (which changed , the phone will no longer mount the <em>external</em> SD card. I am good-ish at Linux, but I have never seen the Android shell before today.</p>
<p>I would love to know the steps to:</p>
<ul>
<li>... | 48,068 | 829,771 | 2014-06-04 11:41:06 | 24,036,449 | 15 | 2014-06-04 11:41:06 | 3,706,809 | 2014-06-04 11:41:06 | https://stackoverflow.com/q/22549489 | https://stackoverflow.com/a/24036449 | <p>I can't believe no one has responded to you in 2 months? Wow...how slack!</p>
<p>Well anyway I spose I should fill you in on some info as well as ask some questions.
1). Have you got root access or did you pull the system vold from a release image/firmware? Like Linux SuperUser rights?
2). If you have root access/s... | <p>I can't believe no one has responded to you in 2 months? Wow...how slack!</p> <p>Well anyway I spose I should fill you in on some info as well as ask some questions. 1). Have you got root access or did you pull the system vold from a release image/firmware? Like Linux SuperUser rights? 2). If you have root access/s... | 390, 1386, 1678 | android, mount, shell | <h1>Mount an SD card manually from adb shell in android</h1>
<p>I have an android 4.1 phone (Lenovo 820). After some changes aimed at partitioning the internal SD ram (which changed , the phone will no longer mount the <em>external</em> SD card. I am good-ish at Linux, but I have never seen the Android shell before tod... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,236 | bash | # Mount an SD card manually from adb shell in android
I have an android 4.1 phone (Lenovo 820). After some changes aimed at partitioning the internal SD ram (which changed , the phone will no longer mount the *external* SD card. I am good-ish at Linux, but I have never seen the Android shell before today.
I would lov... | I can't believe no one has responded to you in 2 months? Wow...how slack!
Well anyway I spose I should fill you in on some info as well as ask some questions.
1). Have you got root access or did you pull the system vold from a release image/firmware? Like Linux SuperUser rights?
2). If you have root access/super user ... |
21345314 | Run ScriptBlock with different credentials | 11 | 2014-01-25 01:16:31 | <p>I have a script, that determines a userid; once I have that userid, I want to run a script block against that userid using different credentials. Is this possible? Can anyone show me examples of this? </p>
| 35,994 | 2,917,511 | 2024-10-21 19:37:23 | 21,439,734 | 15 | 2014-01-29 18:38:55 | 2,917,511 | 2014-01-29 18:38:55 | https://stackoverflow.com/q/21345314 | https://stackoverflow.com/a/21439734 | <p>I got it, thanks to Trevor Sullivan for pointing me in the right direction. I ended up just putting my second ps1 file into a scriptblock, and running it as a job, and passing it the arguments from the main script, like this</p>
<pre><code>$job = Start-Job -scriptblock {
param ($username)
some code to run against t... | <p>I got it, thanks to Trevor Sullivan for pointing me in the right direction. I ended up just putting my second ps1 file into a scriptblock, and running it as a job, and passing it the arguments from the main script, like this</p> <pre><code>$job = Start-Job -scriptblock { param ($username) some code to run against t... | 526, 5357 | credentials, powershell | <h1>Run ScriptBlock with different credentials</h1>
<p>I have a script, that determines a userid; once I have that userid, I want to run a script block against that userid using different credentials. Is this possible? Can anyone show me examples of this? </p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,237 | bash | # Run ScriptBlock with different credentials
I have a script, that determines a userid; once I have that userid, I want to run a script block against that userid using different credentials. Is this possible? Can anyone show me examples of this? | I got it, thanks to Trevor Sullivan for pointing me in the right direction. I ended up just putting my second ps1 file into a scriptblock, and running it as a job, and passing it the arguments from the main script, like this
```
$job = Start-Job -scriptblock {
param ($username)
some code to run against the variable th... |
21041543 | How to rename a column heading in a CSV file? | 11 | 2014-01-10 10:14:20 | <p>I cannot work out how to rename a column heading in a CSV file with Windows PowerShell. I can add new rows, delete rows, fill, and export, but cannot find out how to change a header value.</p>
<p>I thought I could import the CSV & export with headers specified, but taht doesn't work:</p>
<pre><code>import-csv c:... | 55,267 | 1,235,462 | 2021-12-21 16:42:07 | 21,042,554 | 15 | 2014-01-10 10:57:30 | 260,545 | 2021-12-21 16:41:48 | https://stackoverflow.com/q/21041543 | https://stackoverflow.com/a/21042554 | <p>You may use <code>Select-Object</code> with a <a href="http://technet.microsoft.com/en-us/library/ff730948.aspx" rel="nofollow noreferrer">calculated property</a> to do this:</p>
<pre><code>Import-Csv test.csv |
Select-Object @{ expression={$_.first_name}; label='test' } |
Export-Csv -NoTypeInformation t... | <p>You may use <code>Select-Object</code> with a <a href="http://technet.microsoft.com/en-us/library/ff730948.aspx" rel="nofollow noreferrer">calculated property</a> to do this:</p> <pre><code>Import-Csv test.csv | Select-Object @{ expression={$_.first_name}; label='test' } | Export-Csv -NoTypeInformation t... | 73, 526 | csv, powershell | <h1>How to rename a column heading in a CSV file?</h1>
<p>I cannot work out how to rename a column heading in a CSV file with Windows PowerShell. I can add new rows, delete rows, fill, and export, but cannot find out how to change a header value.</p>
<p>I thought I could import the CSV & export with headers specifi... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,238 | bash | # How to rename a column heading in a CSV file?
I cannot work out how to rename a column heading in a CSV file with Windows PowerShell. I can add new rows, delete rows, fill, and export, but cannot find out how to change a header value.
I thought I could import the CSV & export with headers specified, but taht doesn'... | You may use `Select-Object` with a [calculated property](http://technet.microsoft.com/en-us/library/ff730948.aspx) to do this:
```
Import-Csv test.csv |
Select-Object @{ expression={$_.first_name}; label='test' } |
Export-Csv -NoTypeInformation test1.csv
``` |
17324392 | How does the PowerShell Pipeline Concept work? | 11 | 2013-06-26 15:33:30 | <p>I understand that PowerShell piping works by taking the output of one cmdlet and passing it to another cmdlet as input. But how does it go about doing this? </p>
<p>Does the first cmdlet finish and then pass all the output variables across at once, which are then processed by the next cmdlet?</p>
<p>Or is each out... | 3,617 | 2,215,029 | 2015-11-07 00:55:39 | 17,329,863 | 15 | 2013-06-26 20:29:47 | 153,982 | 2013-06-26 20:29:47 | https://stackoverflow.com/q/17324392 | https://stackoverflow.com/a/17329863 | <p>You can see how pipeline order works with a simple bit of script:</p>
<pre><code>function a {begin {Write-Host 'begin a'} process {Write-Host "process a: $_"; $_} end {Write-Host 'end a'}}
function b {begin {Write-Host 'begin b'} process {Write-Host "process b: $_"; $_} end {Write-Host 'end b'}}
function c { Write-... | <p>You can see how pipeline order works with a simple bit of script:</p> <pre><code>function a {begin {Write-Host 'begin a'} process {Write-Host "process a: $_"; $_} end {Write-Host 'end a'}} function b {begin {Write-Host 'begin b'} process {Write-Host "process b: $_"; $_} end {Write-Host 'end b'}} function c { Write-... | 526, 2844, 12103 | conceptual, pipeline, powershell | <h1>How does the PowerShell Pipeline Concept work?</h1>
<p>I understand that PowerShell piping works by taking the output of one cmdlet and passing it to another cmdlet as input. But how does it go about doing this? </p>
<p>Does the first cmdlet finish and then pass all the output variables across at once, which are t... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,239 | bash | # How does the PowerShell Pipeline Concept work?
I understand that PowerShell piping works by taking the output of one cmdlet and passing it to another cmdlet as input. But how does it go about doing this?
Does the first cmdlet finish and then pass all the output variables across at once, which are then processed by ... | You can see how pipeline order works with a simple bit of script:
```
function a {begin {Write-Host 'begin a'} process {Write-Host "process a: $_"; $_} end {Write-Host 'end a'}}
function b {begin {Write-Host 'begin b'} process {Write-Host "process b: $_"; $_} end {Write-Host 'end b'}}
function c { Write-Host 'c' }
1.... |
17242773 | Pass in variable from shell script to applescript | 11 | 2013-06-21 19:19:40 | <p>I've got a shell script that I call that uses <code>osascript</code>, and that <code>osascript</code> calls a shell script and passes in a variable that I've set in the original shell script. I don't know how to pass that variable in from the applescript to shell script.</p>
<p>How can I pass in a variable from sh... | 16,809 | 996,110 | 2023-10-27 20:41:36 | 17,243,326 | 15 | 2013-06-21 19:57:14 | 632,407 | 2021-12-17 22:18:00 | https://stackoverflow.com/q/17242773 | https://stackoverflow.com/a/17243326 | <p>Shell variables don't expand inside single quotes. When you to want pass a shell variable to <code>osascript</code> you need to use double <code>""</code> quotes. The problem is, than you must escape double quotes needed inside the osascript, like:</p>
<p>the script</p>
<pre><code>say "Hello" usi... | <p>Shell variables don't expand inside single quotes. When you to want pass a shell variable to <code>osascript</code> you need to use double <code>""</code> quotes. The problem is, than you must escape double quotes needed inside the osascript, like:</p> <p>the script</p> <pre><code>say "Hello" usi... | 387, 390, 1243, 15718 | applescript, bash, osascript, shell | <h1>Pass in variable from shell script to applescript</h1>
<p>I've got a shell script that I call that uses <code>osascript</code>, and that <code>osascript</code> calls a shell script and passes in a variable that I've set in the original shell script. I don't know how to pass that variable in from the applescript to... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,240 | bash | # Pass in variable from shell script to applescript
I've got a shell script that I call that uses `osascript`, and that `osascript` calls a shell script and passes in a variable that I've set in the original shell script. I don't know how to pass that variable in from the applescript to shell script.
How can I pass i... | Shell variables don't expand inside single quotes. When you to want pass a shell variable to `osascript` you need to use double `""` quotes. The problem is, than you must escape double quotes needed inside the osascript, like:
the script
```
say "Hello" using "Alex"
```
you need escape quotes
```
text="Hello"
osasc... |
15557857 | How to kill all processes that were opened by a shell script upon ctrl + C? | 11 | 2013-03-21 20:53:10 | <p>I've got a couple python scripts which I start collectively from a shell script as follows:</p>
<pre><code>#!/bin/bash
python prog1.py &
python prog2.py &
python prog3.py
</code></pre>
<p>Since I am developing I often want to stop these processes. I normally do so by hitting ctrl+C, but unfortuntaly a cou... | 3,474 | 1,650,012 | 2013-03-21 21:02:37 | 15,557,994 | 15 | 2013-03-21 20:59:58 | 1,204,143 | 2013-03-21 20:59:58 | https://stackoverflow.com/q/15557857 | https://stackoverflow.com/a/15557994 | <p>Let the bash script catch SIGINT, and have it kill everything in the current process group:</p>
<pre><code>intexit() {
# Kill all subprocesses (all processes in the current process group)
kill -HUP -$$
}
hupexit() {
# HUP'd (probably by intexit)
echo
echo "Interrupted"
exit
}
trap hupexit ... | <p>Let the bash script catch SIGINT, and have it kill everything in the current process group:</p> <pre><code>intexit() { # Kill all subprocesses (all processes in the current process group) kill -HUP -$$ } hupexit() { # HUP'd (probably by intexit) echo echo "Interrupted" exit } trap hupexit ... | 387 | bash | <h1>How to kill all processes that were opened by a shell script upon ctrl + C?</h1>
<p>I've got a couple python scripts which I start collectively from a shell script as follows:</p>
<pre><code>#!/bin/bash
python prog1.py &
python prog2.py &
python prog3.py
</code></pre>
<p>Since I am developing I often wan... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,241 | bash | # How to kill all processes that were opened by a shell script upon ctrl + C?
I've got a couple python scripts which I start collectively from a shell script as follows:
```
#!/bin/bash
python prog1.py &
python prog2.py &
python prog3.py
```
Since I am developing I often want to stop these processes. I normally do s... | Let the bash script catch SIGINT, and have it kill everything in the current process group:
```
intexit() {
# Kill all subprocesses (all processes in the current process group)
kill -HUP -$$
}
hupexit() {
# HUP'd (probably by intexit)
echo
echo "Interrupted"
exit
}
trap hupexit HUP
trap intex... |
13968004 | How do I use Json.NET to parse json in PowerShell? | 11 | 2012-12-20 08:29:26 | <p>I want to parse JSON in PowerShell but I can't use the new v3 functions that are available in PowerShell. My first thought was to load the JSON.Net assembly and use that to parse the JSON string but it doesn't work as I expect it to.</p>
<p>I have this JSON:</p>
<pre><code>$json = "{""Name"": ""Apple"",
... | 25,994 | 280,693 | 2022-11-07 22:53:14 | 13,989,994 | 15 | 2012-12-21 12:13:38 | 280,693 | 2017-10-20 11:00:59 | https://stackoverflow.com/q/13968004 | https://stackoverflow.com/a/13989994 | <p>Ok, so here is how I did it so it works down to at least PowerShell v2 on Windows 2008.</p>
<p>First, load the Json.NET assembly for the version you would like to use, I took the .NET 3.5 version:</p>
<pre><code>[Reflection.Assembly]::LoadFile("Newtonsoft.Json.dll")
</code></pre>
<p>I had the JSON in a file since... | <p>Ok, so here is how I did it so it works down to at least PowerShell v2 on Windows 2008.</p> <p>First, load the Json.NET assembly for the version you would like to use, I took the .NET 3.5 version:</p> <pre><code>[Reflection.Assembly]::LoadFile("Newtonsoft.Json.dll") </code></pre> <p>I had the JSON in a file since... | 526, 1508, 16268 | json, json.net, powershell | <h1>How do I use Json.NET to parse json in PowerShell?</h1>
<p>I want to parse JSON in PowerShell but I can't use the new v3 functions that are available in PowerShell. My first thought was to load the JSON.Net assembly and use that to parse the JSON string but it doesn't work as I expect it to.</p>
<p>I have this JSO... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,242 | bash | # How do I use Json.NET to parse json in PowerShell?
I want to parse JSON in PowerShell but I can't use the new v3 functions that are available in PowerShell. My first thought was to load the JSON.Net assembly and use that to parse the JSON string but it doesn't work as I expect it to.
I have this JSON:
```
$json = ... | Ok, so here is how I did it so it works down to at least PowerShell v2 on Windows 2008.
First, load the Json.NET assembly for the version you would like to use, I took the .NET 3.5 version:
```
[Reflection.Assembly]::LoadFile("Newtonsoft.Json.dll")
```
I had the JSON in a file since it was used in a deployment confi... |
12600177 | Length of shortest line? | 11 | 2012-09-26 10:58:06 | <p>In Linux command using <code>wc -L</code> it's possible to get the length of longest line of a text file.</p>
<p>How do I find the length of the <em>shortest</em> line of a text file?</p>
| 9,743 | 1,459,344 | 2015-12-15 00:41:01 | 12,600,382 | 15 | 2012-09-26 11:09:57 | 1,690,777 | 2012-09-26 11:09:57 | https://stackoverflow.com/q/12600177 | https://stackoverflow.com/a/12600382 | <p>Try this:</p>
<pre><code>awk '{print length}' <your_file> | sort -n | head -n1
</code></pre>
<p>This command gets lengths of all files, sorts them (correctly, as numbers) and, fianlly, prints the smallest number to console.</p>
| <p>Try this:</p> <pre><code>awk '{print length}' <your_file> | sort -n | head -n1 </code></pre> <p>This command gets lengths of all files, sorts them (correctly, as numbers) and, fianlly, prints the smallest number to console.</p> | 58, 390 | linux, shell | <h1>Length of shortest line?</h1>
<p>In Linux command using <code>wc -L</code> it's possible to get the length of longest line of a text file.</p>
<p>How do I find the length of the <em>shortest</em> line of a text file?</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,243 | bash | # Length of shortest line?
In Linux command using `wc -L` it's possible to get the length of longest line of a text file.
How do I find the length of the *shortest* line of a text file? | Try this:
```
awk '{print length}' <your_file> | sort -n | head -n1
```
This command gets lengths of all files, sorts them (correctly, as numbers) and, fianlly, prints the smallest number to console. |
12320275 | How to pipe output of Invoke-Expression to string? | 11 | 2012-09-07 14:39:57 | <p>In a Powershell script, I something like this:</p>
<pre><code>Invoke-Expression "& `"C:\Scripts\psftp.exe`" ftp.blah.com"
</code></pre>
<p>I want to pipe all output, errors etc of this to the string <code>$output</code></p>
<p>How can I do this? I've tried <code>></code> at the end as well as <code>$output... | 29,277 | 1,128,875 | 2012-09-07 14:52:36 | 12,320,512 | 15 | 2012-09-07 14:52:36 | 153,982 | 2012-09-07 14:52:36 | https://stackoverflow.com/q/12320275 | https://stackoverflow.com/a/12320512 | <p>Try this:</p>
<pre><code>$output = Invoke-Expression "C:\Scripts\psftp.exe ftp.blah.com 2>&1"
</code></pre>
<p>The use of the call operator <code>&</code> is unnecessary as is quoting the exe path in this case since the path doesn't contain spaces. If the path contained spaces, then it would need to be... | <p>Try this:</p> <pre><code>$output = Invoke-Expression "C:\Scripts\psftp.exe ftp.blah.com 2>&1" </code></pre> <p>The use of the call operator <code>&</code> is unnecessary as is quoting the exe path in this case since the path doesn't contain spaces. If the path contained spaces, then it would need to be... | 526 | powershell | <h1>How to pipe output of Invoke-Expression to string?</h1>
<p>In a Powershell script, I something like this:</p>
<pre><code>Invoke-Expression "& `"C:\Scripts\psftp.exe`" ftp.blah.com"
</code></pre>
<p>I want to pipe all output, errors etc of this to the string <code>$output</code></p>
<p>How can I do this? I've... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,244 | bash | # How to pipe output of Invoke-Expression to string?
In a Powershell script, I something like this:
```
Invoke-Expression "& `"C:\Scripts\psftp.exe`" ftp.blah.com"
```
I want to pipe all output, errors etc of this to the string `$output`
How can I do this? I've tried `>` at the end as well as `$output = ...` but ne... | Try this:
```
$output = Invoke-Expression "C:\Scripts\psftp.exe ftp.blah.com 2>&1"
```
The use of the call operator `&` is unnecessary as is quoting the exe path in this case since the path doesn't contain spaces. If the path contained spaces, then it would need to be quoted and then you would have to use the call op... |
10316888 | Bash ${!variable} | 11 | 2012-04-25 13:38:02 | <p>I am scratching my head on this one, can't find the bash reference talking about it. </p>
<p>In the code below</p>
<pre><code>host_color=${uphost}_host_color
host_color=${!host_color}
</code></pre>
<p>What is the second line doing ? what does the !operator do in this case ?</p>
| 11,978 | 258,689 | 2012-04-25 14:04:47 | 10,317,069 | 15 | 2012-04-25 13:47:32 | 34,148 | 2012-04-25 14:04:47 | https://stackoverflow.com/q/10316888 | https://stackoverflow.com/a/10317069 | <p>That is a short form for <a href="http://tldp.org/LDP/abs/html/ivr.html" rel="noreferrer">indirect references</a>.</p>
<pre><code>$ foo=bar
$ bar=bas
$ echo ${!foo}
bas
</code></pre>
<p>The seemingly similar construction <a href="http://tldp.org/LDP/abs/html/parameter-substitution.html#VARPREFIXM" rel="noreferrer"... | <p>That is a short form for <a href="http://tldp.org/LDP/abs/html/ivr.html" rel="noreferrer">indirect references</a>.</p> <pre><code>$ foo=bar $ bar=bas $ echo ${!foo} bas </code></pre> <p>The seemingly similar construction <a href="http://tldp.org/LDP/abs/html/parameter-substitution.html#VARPREFIXM" rel="noreferrer"... | 387 | bash | <h1>Bash ${!variable}</h1>
<p>I am scratching my head on this one, can't find the bash reference talking about it. </p>
<p>In the code below</p>
<pre><code>host_color=${uphost}_host_color
host_color=${!host_color}
</code></pre>
<p>What is the second line doing ? what does the !operator do in this case ?</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,245 | bash | # Bash ${!variable}
I am scratching my head on this one, can't find the bash reference talking about it.
In the code below
```
host_color=${uphost}_host_color
host_color=${!host_color}
```
What is the second line doing ? what does the !operator do in this case ? | That is a short form for [indirect references](http://tldp.org/LDP/abs/html/ivr.html).
```
$ foo=bar
$ bar=bas
$ echo ${!foo}
bas
```
The seemingly similar construction [${!foo*}](http://tldp.org/LDP/abs/html/parameter-substitution.html#VARPREFIXM) expands to *the names of all variables whose name begin with foo*:
`... |
8186079 | generate php classes in bash | 11 | 2011-11-18 17:01:49 | <p>i have this script:</p>
<pre><code> #!/bin/bash
if [[ -z "$1" ]] ; then
echo "Class is required"
exit 1;
fi
if [[ -z "$2" ]] ; then
package="Default"
else
package=$2;
fi
echo "<?php
/**
* $1.class.php
*
* Vcard class file.
* @name Project
* @author... | 210 | 1,034,727 | 2011-11-18 17:48:51 | 8,186,365 | 15 | 2011-11-18 17:24:08 | 378,193 | 2011-11-18 17:48:51 | https://stackoverflow.com/q/8186079 | https://stackoverflow.com/a/8186365 | <p>If you want to ensure it's called MyClass you can add this somewhere after the validations:</p>
<pre><code>fname=$( IFS='_'; for i in ${1,,}; do echo -n ${i^}; done )
</code></pre>
<p>And use <code>$fname.class.php</code></p>
| <p>If you want to ensure it's called MyClass you can add this somewhere after the validations:</p> <pre><code>fname=$( IFS='_'; for i in ${1,,}; do echo -n ${i^}; done ) </code></pre> <p>And use <code>$fname.class.php</code></p> | 5, 387 | bash, php | <h1>generate php classes in bash</h1>
<p>i have this script:</p>
<pre><code> #!/bin/bash
if [[ -z "$1" ]] ; then
echo "Class is required"
exit 1;
fi
if [[ -z "$2" ]] ; then
package="Default"
else
package=$2;
fi
echo "<?php
/**
* $1.class.php
*
* Vcard class file.
... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,246 | bash | # generate php classes in bash
i have this script:
```
#!/bin/bash
if [[ -z "$1" ]] ; then
echo "Class is required"
exit 1;
fi
if [[ -z "$2" ]] ; then
package="Default"
else
package=$2;
fi
echo "<?php
/**
* $1.class.php
*
* Vcard class file.
* @name Proje... | If you want to ensure it's called MyClass you can add this somewhere after the validations:
```
fname=$( IFS='_'; for i in ${1,,}; do echo -n ${i^}; done )
```
And use `$fname.class.php` |
5615570 | $$ in a script vs $$ in a subshell | 11 | 2011-04-11 00:00:12 | <p><code>$$</code> gives process id of the script process when used in a script, like this:</p>
<p>Example 1</p>
<pre><code>#!/bin/bash
# processid.sh
# print process ids
ps -o cmd,pid,ppid
echo "The value of \$\$ is $$"
$ ./processid.sh
CMD PID PPID
bash 15073 46... | 8,854 | 494,074 | 2017-02-01 02:28:49 | 5,630,894 | 15 | 2011-04-12 05:45:48 | 36,472 | 2011-04-12 05:45:48 | https://stackoverflow.com/q/5615570 | https://stackoverflow.com/a/5630894 | <p>I tried and escaping (to pass the $$ to the subshell) does not work as the subshell inherits the $$ value from the parent bash. The solution to this is to use $BASHPID.</p>
<pre><code>(echo $$; echo $BASHPID)
</code></pre>
<p>prints the PID from the parent shell and from the subshell.</p>
| <p>I tried and escaping (to pass the $$ to the subshell) does not work as the subshell inherits the $$ value from the parent bash. The solution to this is to use $BASHPID.</p> <pre><code>(echo $$; echo $BASHPID) </code></pre> <p>prints the PID from the parent shell and from the subshell.</p> | 387, 390, 531 | bash, scripting, shell | <h1>$$ in a script vs $$ in a subshell</h1>
<p><code>$$</code> gives process id of the script process when used in a script, like this:</p>
<p>Example 1</p>
<pre><code>#!/bin/bash
# processid.sh
# print process ids
ps -o cmd,pid,ppid
echo "The value of \$\$ is $$"
$ ./processid.sh
CMD PID... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,247 | bash | # $$ in a script vs $$ in a subshell
`$$` gives process id of the script process when used in a script, like this:
Example 1
```
#!/bin/bash
# processid.sh
# print process ids
ps -o cmd,pid,ppid
echo "The value of \$\$ is $$"
$ ./processid.sh
CMD PID PPID
bash 150... | I tried and escaping (to pass the $$ to the subshell) does not work as the subshell inherits the $$ value from the parent bash. The solution to this is to use $BASHPID.
```
(echo $$; echo $BASHPID)
```
prints the PID from the parent shell and from the subshell. |
5571579 | Escaping splatted variables in Powershell Invoke-Expression | 11 | 2011-04-06 19:02:35 | <p>I'm trying to invoke another application (Beyond Compare) from Powershell which requires an @ in the typical command-line:</p>
<pre><code>C:\deploy>bcompare @static.diff
</code></pre>
<p>I've found Powershell's Invoke-Expression, but when I try the following it gives me an error:</p>
<pre><code>PS C:\deploy>... | 14,880 | 2,787 | 2019-03-15 13:36:08 | 5,571,703 | 15 | 2011-04-06 19:12:56 | 73,070 | 2011-04-06 19:12:56 | https://stackoverflow.com/q/5571579 | https://stackoverflow.com/a/5571703 | <pre><code>bcompare '@static.diff'
</code></pre>
<p>If in doubt, put it into a string :-)</p>
<pre><code>PS Home:\> args '@static.diff'
argv[0] = "C:\Users\Joey\Batches\args.cmd"
argv[1] = @static.diff
</code></pre>
| <pre><code>bcompare '@static.diff' </code></pre> <p>If in doubt, put it into a string :-)</p> <pre><code>PS Home:\> args '@static.diff' argv[0] = "C:\Users\Joey\Batches\args.cmd" argv[1] = @static.diff </code></pre> | 526, 4804 | escaping, powershell | <h1>Escaping splatted variables in Powershell Invoke-Expression</h1>
<p>I'm trying to invoke another application (Beyond Compare) from Powershell which requires an @ in the typical command-line:</p>
<pre><code>C:\deploy>bcompare @static.diff
</code></pre>
<p>I've found Powershell's Invoke-Expression, but when I tr... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,248 | bash | # Escaping splatted variables in Powershell Invoke-Expression
I'm trying to invoke another application (Beyond Compare) from Powershell which requires an @ in the typical command-line:
```
C:\deploy>bcompare @static.diff
```
I've found Powershell's Invoke-Expression, but when I try the following it gives me an error... | ```
bcompare '@static.diff'
```
If in doubt, put it into a string :-)
```
PS Home:\> args '@static.diff'
argv[0] = "C:\Users\Joey\Batches\args.cmd"
argv[1] = @static.diff
``` |
4753051 | How do i check if a particular MSI is installed? | 11 | 2011-01-20 21:51:39 | <p>I'm writing a powershell script that will install some dependencies for my webapp. In my script, I'm running into a recurring problem of checking if a particular application is installed. it seems there's a unique way of checking if an application exists for each application (ie: by checking the existing of this fol... | 50,888 | 89,605 | 2023-07-25 16:40:33 | 4,753,203 | 15 | 2011-01-20 22:08:04 | 323,582 | 2014-08-18 22:04:55 | https://stackoverflow.com/q/4753051 | https://stackoverflow.com/a/4753203 | <p>Here is the code I use sometimes (not too often, so...). See the help comments for details.</p>
<pre class="lang-none prettyprint-override"><code><#
.SYNOPSIS
Gets uninstall records from the registry.
.DESCRIPTION
This function returns information similar to the "Add or remove programs"
Windows tool... | <p>Here is the code I use sometimes (not too often, so...). See the help comments for details.</p> <pre class="lang-none prettyprint-override"><code><# .SYNOPSIS Gets uninstall records from the registry. .DESCRIPTION This function returns information similar to the "Add or remove programs" Windows tool... | 526 | powershell | <h1>How do i check if a particular MSI is installed?</h1>
<p>I'm writing a powershell script that will install some dependencies for my webapp. In my script, I'm running into a recurring problem of checking if a particular application is installed. it seems there's a unique way of checking if an application exists for ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,249 | bash | # How do i check if a particular MSI is installed?
I'm writing a powershell script that will install some dependencies for my webapp. In my script, I'm running into a recurring problem of checking if a particular application is installed. it seems there's a unique way of checking if an application exists for each appl... | Here is the code I use sometimes (not too often, so...). See the help comments for details.
```
<#
.SYNOPSIS
Gets uninstall records from the registry.
.DESCRIPTION
This function returns information similar to the "Add or remove programs"
Windows tool. The function normally works much faster and gets some ... |
4250280 | Shell script detecting running in Cygwin | 11 | 2010-11-22 21:13:12 | <p>Is there a simple way to check if a script is running in Cygwin. We have a script that calls a utility that expects the paths passed to be windows so if we're in Cygwin we have to convert the paths to windows paths.</p>
| 3,964 | 98,050 | 2014-07-21 17:31:13 | 4,251,218 | 15 | 2010-11-22 23:17:52 | 430,775 | 2010-11-22 23:17:52 | https://stackoverflow.com/q/4250280 | https://stackoverflow.com/a/4251218 | <p>You can use the <code>uname</code> utility. From <a href="http://linux.die.net/man/1/uname" rel="noreferrer">uname(1)</a>:</p>
<blockquote>-o, --operating-system<br>
print the operating system
</blockquote>
<p>Example code:</p>
<pre><code>if [ `uname -o` = "Cygwin" ]
then
# Cygwin specific stuff
else
... | <p>You can use the <code>uname</code> utility. From <a href="http://linux.die.net/man/1/uname" rel="noreferrer">uname(1)</a>:</p> <blockquote>-o, --operating-system<br> print the operating system </blockquote> <p>Example code:</p> <pre><code>if [ `uname -o` = "Cygwin" ] then # Cygwin specific stuff else ... | 34, 64, 387, 390, 1731 | bash, cygwin, shell, unix, windows | <h1>Shell script detecting running in Cygwin</h1>
<p>Is there a simple way to check if a script is running in Cygwin. We have a script that calls a utility that expects the paths passed to be windows so if we're in Cygwin we have to convert the paths to windows paths.</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,250 | bash | # Shell script detecting running in Cygwin
Is there a simple way to check if a script is running in Cygwin. We have a script that calls a utility that expects the paths passed to be windows so if we're in Cygwin we have to convert the paths to windows paths. | You can use the `uname` utility. From [uname(1)](http://linux.die.net/man/1/uname):
> -o, --operating-system
> print the operating system
Example code:
```
if [ `uname -o` = "Cygwin" ]
then
# Cygwin specific stuff
else
# Other UNIX (Linux, etc.) specific stuff
fi
``` |
2572495 | read from file and add numbers | 11 | 2010-04-03 20:01:53 | <p>I have text file with entries like
123
112
3333
44
2</p>
<p>How to add these numbers and get the sum of these.</p>
| 24,163 | 308,445 | 2018-10-11 16:16:09 | 2,572,514 | 15 | 2010-04-03 20:07:50 | 89,391 | 2018-10-11 16:16:09 | https://stackoverflow.com/q/2572495 | https://stackoverflow.com/a/2572514 | <p>Example:</p>
<pre><code>$ cat numbers.txt
123 112 3333 44 2
$ SUM=0; for i in `cat numbers.txt`; do SUM=$(($SUM + $i)); done; echo $SUM
3614
</code></pre>
<p>See also: <a href="http://tldp.org/HOWTO/Bash-Prog-Intro-HOWTO-10.html#ss10.2" rel="noreferrer">Bash Programming Introduction, section on arithmetic evaluat... | <p>Example:</p> <pre><code>$ cat numbers.txt 123 112 3333 44 2 $ SUM=0; for i in `cat numbers.txt`; do SUM=$(($SUM + $i)); done; echo $SUM 3614 </code></pre> <p>See also: <a href="http://tldp.org/HOWTO/Bash-Prog-Intro-HOWTO-10.html#ss10.2" rel="noreferrer">Bash Programming Introduction, section on arithmetic evaluat... | 387, 14215 | addition, bash | <h1>read from file and add numbers</h1>
<p>I have text file with entries like
123
112
3333
44
2</p>
<p>How to add these numbers and get the sum of these.</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,251 | bash | # read from file and add numbers
I have text file with entries like
123
112
3333
44
2
How to add these numbers and get the sum of these. | Example:
```
$ cat numbers.txt
123 112 3333 44 2
$ SUM=0; for i in `cat numbers.txt`; do SUM=$(($SUM + $i)); done; echo $SUM
3614
```
See also: [Bash Programming Introduction, section on arithmetic evaluation](http://tldp.org/HOWTO/Bash-Prog-Intro-HOWTO-10.html#ss10.2)
Another way would be to use `bc`, an arbitrary... |
2164986 | powershell xml xpath | 11 | 2010-01-29 20:37:10 | <p>In Powershell,
suppose I have the following xml:</p>
<pre><code> <Users>
<User Name="Foo">
<Friends>
<Friend Name="Bar"/>
</Friends>
</User>
<User Name="Foo2" />
<User Name="Foo3">
<Friends>
<Friend Name="Bar... | 18,655 | 20,257 | 2019-09-04 15:21:55 | 2,165,192 | 15 | 2010-01-29 21:12:09 | 153,982 | 2010-01-29 21:12:09 | https://stackoverflow.com/q/2164986 | https://stackoverflow.com/a/2165192 | <p>I have a preference for using XPath these days. I've run into issues using PowerShell's xml adapter that are annoying like the name collision on <code>item</code>:</p>
<pre><code>$xml = [xml]@'
<Users>
<User Name="Foo">
<Friends>
<Friend Name="Bar"/>
</Friend... | <p>I have a preference for using XPath these days. I've run into issues using PowerShell's xml adapter that are annoying like the name collision on <code>item</code>:</p> <pre><code>$xml = [xml]@' <Users> <User Name="Foo"> <Friends> <Friend Name="Bar"/> </Friend... | 19, 526, 1227 | powershell, xml, xpath | <h1>powershell xml xpath</h1>
<p>In Powershell,
suppose I have the following xml:</p>
<pre><code> <Users>
<User Name="Foo">
<Friends>
<Friend Name="Bar"/>
</Friends>
</User>
<User Name="Foo2" />
<User Name="Foo3">
<Friends>... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,252 | bash | # powershell xml xpath
In Powershell,
suppose I have the following xml:
```
<Users>
<User Name="Foo">
<Friends>
<Friend Name="Bar"/>
</Friends>
</User>
<User Name="Foo2" />
<User Name="Foo3">
<Friends>
<Friend Name="Bar"/>
</Friends>
</User>
</Users>
```... | I have a preference for using XPath these days. I've run into issues using PowerShell's xml adapter that are annoying like the name collision on `item`:
```
$xml = [xml]@'
<Users>
<User Name="Foo">
<Friends>
<Friend Name="Bar"/>
</Friends>
</User>
<User Name="Foo2" />
<User... |
1644532 | How to split file on first empty line in a portable way in shell (e.g. using sed)? | 11 | 2009-10-29 15:27:04 | <p>I want to split a file containg HTTP response into two files: one containing only HTTP headers, and one containg the body of a message. For this I need to split a file into two on first empty line (or for UNIX tools on first line containing only CR = '<code>\r</code>' character) using a <strong>shell script</strong... | 8,836 | 46,058 | 2023-02-16 10:42:10 | 1,644,576 | 15 | 2009-10-29 15:34:02 | 68,587 | 2009-10-29 15:34:02 | https://stackoverflow.com/q/1644532 | https://stackoverflow.com/a/1644576 | <pre><code>$ cat test.txt
a
b
c
d
e
f
$ sed '/^$/q' test.txt
a
b
c
$ sed '1,/^$/d' test.txt
d
e
f
</code></pre>
<p>Change the <code>/^$/</code> to <code>/^\s*$/</code> if you expect there may be whitespace on the blank line.</p>
| <pre><code>$ cat test.txt a b c d e f $ sed '/^$/q' test.txt a b c $ sed '1,/^$/d' test.txt d e f </code></pre> <p>Change the <code>/^$/</code> to <code>/^\s*$/</code> if you expect there may be whitespace on the blank line.</p> | 390, 1407, 5050, 5282, 30640 | filesplitting, portability, sed, shell, text-manipulation | <h1>How to split file on first empty line in a portable way in shell (e.g. using sed)?</h1>
<p>I want to split a file containg HTTP response into two files: one containing only HTTP headers, and one containg the body of a message. For this I need to split a file into two on first empty line (or for UNIX tools on first... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,253 | bash | # How to split file on first empty line in a portable way in shell (e.g. using sed)?
I want to split a file containg HTTP response into two files: one containing only HTTP headers, and one containg the body of a message. For this I need to split a file into two on first empty line (or for UNIX tools on first line cont... | ```
$ cat test.txt
a
b
c
d
e
f
$ sed '/^$/q' test.txt
a
b
c
$ sed '1,/^$/d' test.txt
d
e
f
```
Change the `/^$/` to `/^\s*$/` if you expect there may be whitespace on the blank line. |
1390782 | Jagged PowerShell array is losing a dimension when only one element exists | 11 | 2009-09-07 19:59:10 | <p>I have the following PowerShell function that works well for any input except for <code>1</code>. If I pass it an input of <code>1</code> it will return an array with two elements <code>1,1</code> instead of a single element which is itself an array of two elements <code>(1,1)</code>.</p>
<p><strong>Any ideas how ... | 2,131 | 3,957 | 2023-02-21 11:19:42 | 1,391,042 | 15 | 2009-09-07 21:39:05 | 5,460 | 2012-08-17 18:10:09 | https://stackoverflow.com/q/1390782 | https://stackoverflow.com/a/1391042 | <p>I tested this on the PowerShell V2 CTP on Windows XP, and saw the same results as the OP.</p>
<p>The problem appears to be PowerShell's habit of "flattening" collections as they're passed along the pipeline. A simple solution is to wrap the return value in an collection by prefacing the expression to be returned wi... | <p>I tested this on the PowerShell V2 CTP on Windows XP, and saw the same results as the OP.</p> <p>The problem appears to be PowerShell's habit of "flattening" collections as they're passed along the pipeline. A simple solution is to wrap the return value in an collection by prefacing the expression to be returned wi... | 114, 526 | arrays, powershell | <h1>Jagged PowerShell array is losing a dimension when only one element exists</h1>
<p>I have the following PowerShell function that works well for any input except for <code>1</code>. If I pass it an input of <code>1</code> it will return an array with two elements <code>1,1</code> instead of a single element which i... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,254 | bash | # Jagged PowerShell array is losing a dimension when only one element exists
I have the following PowerShell function that works well for any input except for `1`. If I pass it an input of `1` it will return an array with two elements `1,1` instead of a single element which is itself an array of two elements `(1,1)`.
... | I tested this on the PowerShell V2 CTP on Windows XP, and saw the same results as the OP.
The problem appears to be PowerShell's habit of "flattening" collections as they're passed along the pipeline. A simple solution is to wrap the return value in an collection by prefacing the expression to be returned with the com... |
1070050 | Powershell in SSIS | 11 | 2009-07-01 16:18:28 | <p>What would I need to do in order to run a PowerShell script in an SSIS package? </p>
<p>Does PowerShell need to be installed on the SQL server?
How do I actually call the script in SSIS?</p>
<p>Thanks</p>
| 5,754 | 33,470 | 2018-07-27 06:45:48 | 1,070,088 | 15 | 2009-07-01 16:24:52 | 95,589 | 2009-07-01 16:24:52 | https://stackoverflow.com/q/1070050 | https://stackoverflow.com/a/1070088 | <p>Yes, PowerShell needs to be installed. Then, you can use an <a href="http://msdn.microsoft.com/en-us/library/ms141166.aspx" rel="noreferrer">Execute Process Task</a> to point to the PowerShell executable and give the script as an argument.</p>
<p>Like so:</p>
<pre><code>Executable: %windir%\system32\WindowsPowerSh... | <p>Yes, PowerShell needs to be installed. Then, you can use an <a href="http://msdn.microsoft.com/en-us/library/ms141166.aspx" rel="noreferrer">Execute Process Task</a> to point to the PowerShell executable and give the script as an argument.</p> <p>Like so:</p> <pre><code>Executable: %windir%\system32\WindowsPowerSh... | 526, 2175 | powershell, ssis | <h1>Powershell in SSIS</h1>
<p>What would I need to do in order to run a PowerShell script in an SSIS package? </p>
<p>Does PowerShell need to be installed on the SQL server?
How do I actually call the script in SSIS?</p>
<p>Thanks</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,255 | bash | # Powershell in SSIS
What would I need to do in order to run a PowerShell script in an SSIS package?
Does PowerShell need to be installed on the SQL server?
How do I actually call the script in SSIS?
Thanks | Yes, PowerShell needs to be installed. Then, you can use an [Execute Process Task](http://msdn.microsoft.com/en-us/library/ms141166.aspx) to point to the PowerShell executable and give the script as an argument.
Like so:
```
Executable: %windir%\system32\WindowsPowerShell\v1.0\powershell.exe
Arguments: C:\path\to\sc... |
68561415 | cant suppress or use an AWS-CLI error in bash | 10 | 2021-07-28 13:33:42 | <p>i have a simple script that i want to display specific information from AWS using
AWS CLI.</p>
<p>for example:</p>
<pre><code>get_cluster_name() {
EKS_NAME=$(aws eks describe-cluster --name ${CUSTOMER_NAME}) && \
echo $EKS_NAME | jq -r .cluster.name}
</code></pre>
<p>the output when the cluster exist is ok, ... | 12,436 | 9,658,396 | 2021-07-28 14:10:31 | 68,561,991 | 15 | 2021-07-28 14:10:31 | 2,221,001 | 2021-07-28 14:10:31 | https://stackoverflow.com/q/68561415 | https://stackoverflow.com/a/68561991 | <p>Here's a consideration, and expansion on my comments. Again you're getting a <code>stderr</code> response when no cluster is found, so this makes this pretty straightforward.</p>
<p>Using <code>>2 /dev/null</code> to suppress that return message in stderr. Then using <code>ret=$?</code> to capture the return code... | <p>Here's a consideration, and expansion on my comments. Again you're getting a <code>stderr</code> response when no cluster is found, so this makes this pretty straightforward.</p> <p>Using <code>>2 /dev/null</code> to suppress that return message in stderr. Then using <code>ret=$?</code> to capture the return code... | 387, 4867, 19156, 99166 | aws-cli, bash, stderr, stdout | <h1>cant suppress or use an AWS-CLI error in bash</h1>
<p>i have a simple script that i want to display specific information from AWS using
AWS CLI.</p>
<p>for example:</p>
<pre><code>get_cluster_name() {
EKS_NAME=$(aws eks describe-cluster --name ${CUSTOMER_NAME}) && \
echo $EKS_NAME | jq -r .cluster.name}
</c... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,256 | bash | # cant suppress or use an AWS-CLI error in bash
i have a simple script that i want to display specific information from AWS using
AWS CLI.
for example:
```
get_cluster_name() {
EKS_NAME=$(aws eks describe-cluster --name ${CUSTOMER_NAME}) && \
echo $EKS_NAME | jq -r .cluster.name}
```
the output when the cluster exi... | Here's a consideration, and expansion on my comments. Again you're getting a `stderr` response when no cluster is found, so this makes this pretty straightforward.
Using `>2 /dev/null` to suppress that return message in stderr. Then using `ret=$?` to capture the return code.
```
get_cluster_name() {
EKS_NAME=$(aws ... |
58449069 | How to enable "Allow Azure services and resources to access this server" through PowerShell (Azure CLI)? | 10 | 2019-10-18 10:33:46 | <p>After creating a new Azure SQL server using <code>az sql server create</code>, how can I enable the following options through PowerShell(Azure CLI)?</p>
<p><a href="https://i.sstatic.net/gXOpx.png" rel="noreferrer"><img src="https://i.sstatic.net/gXOpx.png" alt="enter image description here"></a></p>
| 7,956 | 3,037,607 | 2024-03-15 19:32:48 | 58,449,999 | 15 | 2019-10-18 11:30:36 | 8,734,587 | 2019-10-18 11:30:36 | https://stackoverflow.com/q/58449069 | https://stackoverflow.com/a/58449999 | <p>It's in the documentation for Azure SQL somewhere, if you search for "azure sql firewall allow azure services", but here's what you need to do - create a rule with a start and end address of 0.0.0.0, like this:</p>
<pre><code>az sql server firewall-rule create --resource-group <resource group name> --server &... | <p>It's in the documentation for Azure SQL somewhere, if you search for "azure sql firewall allow azure services", but here's what you need to do - create a rule with a start and end address of 0.0.0.0, like this:</p> <pre><code>az sql server firewall-rule create --resource-group <resource group name> --server &... | 72, 526, 2045, 14158, 108105 | azure, azure-cli, firewall, powershell, sql-server | <h1>How to enable "Allow Azure services and resources to access this server" through PowerShell (Azure CLI)?</h1>
<p>After creating a new Azure SQL server using <code>az sql server create</code>, how can I enable the following options through PowerShell(Azure CLI)?</p>
<p><a href="https://i.sstatic.net/gXOpx.png" rel=... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,258 | bash | # How to enable "Allow Azure services and resources to access this server" through PowerShell (Azure CLI)?
After creating a new Azure SQL server using `az sql server create`, how can I enable the following options through PowerShell(Azure CLI)?
[](https:... | It's in the documentation for Azure SQL somewhere, if you search for "azure sql firewall allow azure services", but here's what you need to do - create a rule with a start and end address of 0.0.0.0, like this:
```
az sql server firewall-rule create --resource-group <resource group name> --server <azure sql name> -n <... |
58431906 | Can a PowerShell function handle multiple input types? | 10 | 2019-10-17 11:47:14 | <p>I'm working on a function that compares two objects so it detects them if they are identical. However I would like it to also work with other types like strings or integers.</p>
<p>C++ lets you declare different functions with the same name to handle function calls with different input types in a different way. I'm ... | 6,334 | 6,068,574 | 2022-06-15 07:46:42 | 58,433,717 | 15 | 2019-10-17 13:22:06 | 45,375 | 2022-06-15 07:46:42 | https://stackoverflow.com/q/58431906 | https://stackoverflow.com/a/58433717 | <p>As <a href="https://stackoverflow.com/users/6083222/jeff-zeitlin">Jeff Zeitlin</a> states in his comment:</p>
<p><strong>Users do NOT have to specify a parameter set explicitly - PowerShell <em>infers</em> the applicable parameter set</strong> from the specific combination of arguments (or absence thereof) passed on... | <p>As <a href="https://stackoverflow.com/users/6083222/jeff-zeitlin">Jeff Zeitlin</a> states in his comment:</p> <p><strong>Users do NOT have to specify a parameter set explicitly - PowerShell <em>infers</em> the applicable parameter set</strong> from the specific combination of arguments (or absence thereof) passed on... | 526, 5569, 119568 | function, parameter-sets, powershell | <h1>Can a PowerShell function handle multiple input types?</h1>
<p>I'm working on a function that compares two objects so it detects them if they are identical. However I would like it to also work with other types like strings or integers.</p>
<p>C++ lets you declare different functions with the same name to handle fu... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,259 | bash | # Can a PowerShell function handle multiple input types?
I'm working on a function that compares two objects so it detects them if they are identical. However I would like it to also work with other types like strings or integers.
C++ lets you declare different functions with the same name to handle function calls wi... | As [Jeff Zeitlin](https://stackoverflow.com/users/6083222/jeff-zeitlin) states in his comment:
**Users do NOT have to specify a parameter set explicitly - PowerShell *infers* the applicable parameter set** from the specific combination of arguments (or absence thereof) passed on invocation.
The inference is based on ... |
57594415 | PowerShell Hashtable show first key | 10 | 2019-08-21 15:00:25 | <p>I am playing around with hashtables in powershell and try to figure out, if there is a way, to show the content of Key1 (not the value).</p>
<p>I tried several ways to have as an result "Monday" but either I get all the names of the table, a blank return or an error message.</p>
<p><strong>here's my table</strong>... | 10,682 | 10,733,432 | 2021-08-11 06:43:26 | 57,595,340 | 15 | 2019-08-21 15:53:15 | 28,828 | 2019-08-21 15:53:15 | https://stackoverflow.com/q/57594415 | https://stackoverflow.com/a/57595340 | <p>You can access the Key/ValueCollection inside the hashtable:</p>
<pre><code>$Weekdays = @{Monday = 'Montag';Tuesday = 'Dienstag'}
echo $($Weekdays.Keys)[0]
echo $($Weekdays.Values)[1]
</code></pre>
<p>will return</p>
<pre><code>Monday
Dienstag
</code></pre>
<p>enclosing the call to "Keys" in $() will result ... | <p>You can access the Key/ValueCollection inside the hashtable:</p> <pre><code>$Weekdays = @{Monday = 'Montag';Tuesday = 'Dienstag'} echo $($Weekdays.Keys)[0] echo $($Weekdays.Values)[1] </code></pre> <p>will return</p> <pre><code>Monday Dienstag </code></pre> <p>enclosing the call to "Keys" in $() will result ... | 526, 5189 | hashtable, powershell | <h1>PowerShell Hashtable show first key</h1>
<p>I am playing around with hashtables in powershell and try to figure out, if there is a way, to show the content of Key1 (not the value).</p>
<p>I tried several ways to have as an result "Monday" but either I get all the names of the table, a blank return or an error mess... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,260 | bash | # PowerShell Hashtable show first key
I am playing around with hashtables in powershell and try to figure out, if there is a way, to show the content of Key1 (not the value).
I tried several ways to have as an result "Monday" but either I get all the names of the table, a blank return or an error message.
**here's m... | You can access the Key/ValueCollection inside the hashtable:
```
$Weekdays = @{Monday = 'Montag';Tuesday = 'Dienstag'}
echo $($Weekdays.Keys)[0]
echo $($Weekdays.Values)[1]
```
will return
```
Monday
Dienstag
```
enclosing the call to "Keys" in $() will result in the Collection being converted to an Object Arra... |
50281853 | git credential helper not working | 10 | 2018-05-10 21:35:51 | <p>I'm trying to save my git password to avoid typing every time.</p>
<p>I am using git bash on windows 10. </p>
<p>git continues to demand a password everytime I hit remote.</p>
<p>(Is git bash why its not working?)</p>
<p>I have tried:</p>
<pre><code>git config --global credential.helper 'cache --timeout 28800'... | 20,728 | 467,240 | 2024-10-07 19:44:37 | 50,285,265 | 15 | 2018-05-11 04:59:42 | 6,309 | 2024-10-07 19:44:37 | https://stackoverflow.com/q/50281853 | https://stackoverflow.com/a/50285265 | <p>First, for Windows, the credential helper to use is <code>manager</code><br />
(see more at "<a href="https://stackoverflow.com/a/65468187/6309">How to remove github login popup asking for credentials?</a>"):</p>
<pre><code>git config --global credential.helper manager
</code></pre>
<p>Second, this only wo... | <p>First, for Windows, the credential helper to use is <code>manager</code><br /> (see more at "<a href="https://stackoverflow.com/a/65468187/6309">How to remove github login popup asking for credentials?</a>"):</p> <pre><code>git config --global credential.helper manager </code></pre> <p>Second, this only wo... | 119, 5357, 61874 | credentials, git, git-bash | <h1>git credential helper not working</h1>
<p>I'm trying to save my git password to avoid typing every time.</p>
<p>I am using git bash on windows 10. </p>
<p>git continues to demand a password everytime I hit remote.</p>
<p>(Is git bash why its not working?)</p>
<p>I have tried:</p>
<pre><code>git config --globa... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,261 | bash | # git credential helper not working
I'm trying to save my git password to avoid typing every time.
I am using git bash on windows 10.
git continues to demand a password everytime I hit remote.
(Is git bash why its not working?)
I have tried:
```
git config --global credential.helper 'cache --timeout 28800'
```
A... | First, for Windows, the credential helper to use is `manager`
(see more at "[How to remove github login popup asking for credentials?](https://stackoverflow.com/a/65468187/6309)"):
```
git config --global credential.helper manager
```
Second, this only works for HTTPS URLs, not SSH ones (`user@server.com`)
For SSH... |
48627989 | Open a terminal via gnome-terminal then execute command, error : "failed to execute child process"" | 10 | 2018-02-05 17:16:59 | <p>Via a bash command, I want open a terminal and, from the new terminal, execute a simple bash command. </p>
<p>I tried: </p>
<pre><code>gnome-terminal -- "/bin/bash -c ls"
</code></pre>
<p>But I got this error: </p>
<p><a href="https://i.sstatic.net/xvggS.png" rel="noreferrer"><img src="https://i.sstatic.net/xvgg... | 22,228 | 2,137,454 | 2019-09-28 12:12:00 | 48,628,070 | 15 | 2018-02-05 17:22:02 | 14,122 | 2018-02-05 17:22:02 | https://stackoverflow.com/q/48627989 | https://stackoverflow.com/a/48628070 | <p>The quotes are telling the terminal to run an executable in <code>/bin</code> called <code>bash -c ls</code> (with the spaces as part of its name!). There exists no such executable.</p>
<p>Take them out:</p>
<pre><code>gnome-terminal -- /bin/bash -c ls
</code></pre>
<p>...or, to actually make something stay open ... | <p>The quotes are telling the terminal to run an executable in <code>/bin</code> called <code>bash -c ls</code> (with the spaces as part of its name!). There exists no such executable.</p> <p>Take them out:</p> <pre><code>gnome-terminal -- /bin/bash -c ls </code></pre> <p>...or, to actually make something stay open ... | 387, 32965 | bash, gnome-terminal | <h1>Open a terminal via gnome-terminal then execute command, error : "failed to execute child process""</h1>
<p>Via a bash command, I want open a terminal and, from the new terminal, execute a simple bash command. </p>
<p>I tried: </p>
<pre><code>gnome-terminal -- "/bin/bash -c ls"
</code></pre>
<p>But I got this er... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 9,262 | bash | # Open a terminal via gnome-terminal then execute command, error : "failed to execute child process""
Via a bash command, I want open a terminal and, from the new terminal, execute a simple bash command.
I tried:
```
gnome-terminal -- "/bin/bash -c ls"
```
But I got this error:
[. There exists no such executable.
Take them out:
```
gnome-terminal -- /bin/bash -c ls
```
...or, to actually make something stay open until the user provides input...
```
gnome-terminal -- ... |
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