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61055196 | How to start WSL terminal in a current powershell directory? | 7 | 2020-04-06 07:50:40 | <p>I can open a powershell and type </p>
<pre><code>> Ubuntu
</code></pre>
<p>to open a WSL ubuntu shell on windows 10. This will always take me to the WSL home directory. How would I instead open the terminal in the same location that the powershell is currently in? </p>
<p>FYI. I need this for creating a right... | 42,280 | 3,059,024 | 2021-04-25 03:02:52 | 61,073,056 | 12 | 2020-04-07 04:53:14 | 5,238,915 | 2021-04-10 17:16:15 | https://stackoverflow.com/q/61055196 | https://stackoverflow.com/a/61073056 | <p>If we look at what running <code>ubuntu.exe</code> actually does:</p>
<pre><code>PS C:\> ubuntu.exe /?
Launches or configures a Linux distribution.
Usage:
<no args>
Launches the user's default shell in the user's home directory.
install [--root]
Install the distribution and do not ... | <p>If we look at what running <code>ubuntu.exe</code> actually does:</p> <pre><code>PS C:\> ubuntu.exe /? Launches or configures a Linux distribution. Usage: <no args> Launches the user's default shell in the user's home directory. install [--root] Install the distribution and do not ... | 526, 119526 | powershell, windows-subsystem-for-linux | <h1>How to start WSL terminal in a current powershell directory?</h1>
<p>I can open a powershell and type </p>
<pre><code>> Ubuntu
</code></pre>
<p>to open a WSL ubuntu shell on windows 10. This will always take me to the WSL home directory. How would I instead open the terminal in the same location that the powe... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,974 | bash | # How to start WSL terminal in a current powershell directory?
I can open a powershell and type
```
> Ubuntu
```
to open a WSL ubuntu shell on windows 10. This will always take me to the WSL home directory. How would I instead open the terminal in the same location that the powershell is currently in?
FYI. I need t... | If we look at what running `ubuntu.exe` actually does:
```
PS C:\> ubuntu.exe /?
Launches or configures a Linux distribution.
Usage:
<no args>
Launches the user's default shell in the user's home directory.
install [--root]
Install the distribution and do not launch the shell when complete.
... |
60892593 | Add-AzTableRow command is not available in Azure Cloud Shell | 7 | 2020-03-27 19:05:11 | <p>I'm trying to insert new row in my table storage by using Azure Cloud Shell but I'm facing below exception. So let me know any other command that we need to use to insert.</p>
<blockquote>
<p>Blockquote</p>
</blockquote>
<pre><code> Add-AzTableRow: The term 'Add-AzTableRow' is not recognized as the name of a cmd... | 9,088 | 1,583,834 | 2020-03-30 03:20:09 | 60,923,570 | 12 | 2020-03-30 03:20:09 | 10,505,040 | 2020-03-30 03:20:09 | https://stackoverflow.com/q/60892593 | https://stackoverflow.com/a/60923570 | <p>According to the error, it seems that you do not install the module <a href="https://www.powershellgallery.com/packages/AzTable/2.0.2" rel="noreferrer"><code>AzTable</code></a>. Please run the command <code>Get-InstalledModule</code> to check if you have installed the module.
<a href="https://i.sstatic.net/mO7hv.png... | <p>According to the error, it seems that you do not install the module <a href="https://www.powershellgallery.com/packages/AzTable/2.0.2" rel="noreferrer"><code>AzTable</code></a>. Please run the command <code>Get-InstalledModule</code> to check if you have installed the module. <a href="https://i.sstatic.net/mO7hv.png... | 35808, 62065, 126343 | azure-cloud-shell, azure-storage, azure-table-storage | <h1>Add-AzTableRow command is not available in Azure Cloud Shell</h1>
<p>I'm trying to insert new row in my table storage by using Azure Cloud Shell but I'm facing below exception. So let me know any other command that we need to use to insert.</p>
<blockquote>
<p>Blockquote</p>
</blockquote>
<pre><code> Add-AzTabl... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,975 | bash | # Add-AzTableRow command is not available in Azure Cloud Shell
I'm trying to insert new row in my table storage by using Azure Cloud Shell but I'm facing below exception. So let me know any other command that we need to use to insert.
> Blockquote
```
Add-AzTableRow: The term 'Add-AzTableRow' is not recognized as t... | According to the error, it seems that you do not install the module [`AzTable`](https://www.powershellgallery.com/packages/AzTable/2.0.2). Please run the command `Get-InstalledModule` to check if you have installed the module.
[](https://i.sstatic.net/mO7h... |
57932053 | Calling other PowerShell scripts within a PowerShell script | 7 | 2019-09-14 02:39:15 | <p>I'm trying to get one master PowerShell script to run all of the others while waiting 30-60 seconds to ensure that the tasks are completed. Everything else I tried wouldn't stop/wait for the first script and its processes to complete before going through all the others at the same time and would cause a restart auto... | 18,567 | 12,065,653 | 2019-09-14 11:45:15 | 57,935,185 | 12 | 2019-09-14 11:45:15 | 1,630,171 | 2019-09-14 11:45:15 | https://stackoverflow.com/q/57932053 | https://stackoverflow.com/a/57935185 | <p>PowerShell can run PowerShell scripts from other PowerShell scripts directly. The only time you need <code>Start-Process</code> for that is when you want to run the called script with elevated privileges (which isn't necessary here, since your parent script is already running elevated).</p>
<p>This should suffice:<... | <p>PowerShell can run PowerShell scripts from other PowerShell scripts directly. The only time you need <code>Start-Process</code> for that is when you want to run the called script with elevated privileges (which isn't necessary here, since your parent script is already running elevated).</p> <p>This should suffice:<... | 526 | powershell | <h1>Calling other PowerShell scripts within a PowerShell script</h1>
<p>I'm trying to get one master PowerShell script to run all of the others while waiting 30-60 seconds to ensure that the tasks are completed. Everything else I tried wouldn't stop/wait for the first script and its processes to complete before going t... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,976 | bash | # Calling other PowerShell scripts within a PowerShell script
I'm trying to get one master PowerShell script to run all of the others while waiting 30-60 seconds to ensure that the tasks are completed. Everything else I tried wouldn't stop/wait for the first script and its processes to complete before going through al... | PowerShell can run PowerShell scripts from other PowerShell scripts directly. The only time you need `Start-Process` for that is when you want to run the called script with elevated privileges (which isn't necessary here, since your parent script is already running elevated).
This should suffice:
```
foreach ($script... |
57374562 | Why does shell builtin colon command ":" after variable assignment on same line cause empty string value to be assigned? | 7 | 2019-08-06 11:03:06 | <p>If I add the <code>colon</code> (<code>:</code>) builtin shell command after an assignment, the variable gets assigned to the empty string (<code>""</code>). Why does it behave like that? I expected it to have no effect.</p>
<pre class="lang-sh prettyprint-override"><code> set -vx
MyVar1='my var 1' : colo... | 492 | 875,915 | 2019-08-06 12:39:40 | 57,374,792 | 12 | 2019-08-06 11:15:43 | 2,088,135 | 2019-08-06 12:39:40 | https://stackoverflow.com/q/57374562 | https://stackoverflow.com/a/57374792 | <p><code>:</code> is a built-in command which returns successfully (a shorthand version of <code>true</code>).</p>
<p>When you do a variable assignment on the same line as a command, the assignment is only valid for the duration of the command (this is typically used to run commands with temporary environment variables... | <p><code>:</code> is a built-in command which returns successfully (a shorthand version of <code>true</code>).</p> <p>When you do a variable assignment on the same line as a command, the assignment is only valid for the duration of the command (this is typically used to run commands with temporary environment variables... | 387, 390, 10327, 14036, 14334 | bash, built-in, sh, shell, variable-assignment | <h1>Why does shell builtin colon command ":" after variable assignment on same line cause empty string value to be assigned?</h1>
<p>If I add the <code>colon</code> (<code>:</code>) builtin shell command after an assignment, the variable gets assigned to the empty string (<code>""</code>). Why does it behave like that... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,977 | bash | # Why does shell builtin colon command ":" after variable assignment on same line cause empty string value to be assigned?
If I add the `colon` (`:`) builtin shell command after an assignment, the variable gets assigned to the empty string (`""`). Why does it behave like that? I expected it to have no effect.
```
... | `:` is a built-in command which returns successfully (a shorthand version of `true`).
When you do a variable assignment on the same line as a command, the assignment is only valid for the duration of the command (this is typically used to run commands with temporary environment variables set).
So when you run:
```
M... |
56166175 | What is the difference between -contains vs .contains in powershell script? | 7 | 2019-05-16 10:15:01 | <p>What is the difference between .contains and -contains? One seems case sensitive while the other one is not.</p>
<pre><code>PS C:\WINDOWS\system32> ("jack", "john", "jill").contains("Jill")
False
PS C:\WINDOWS\system32> "jack", "john", "jill" -contains "Jill"
True
</code></pre>
<p>Why is there such a discr... | 15,778 | 626,563 | 2019-05-16 10:53:03 | 56,166,481 | 12 | 2019-05-16 10:31:47 | 11,025,476 | 2019-05-16 10:37:56 | https://stackoverflow.com/q/56166175 | https://stackoverflow.com/a/56166481 | <p>The <code>-Contains</code> operator compares one object against a collection. It returns true if that entire value exists as an item in a collection. It is case-insensitive and is not limited to strings. <code>-CContains</code> is the case-sensitive version. The <code>.Contains()</code> method is a .NET method from ... | <p>The <code>-Contains</code> operator compares one object against a collection. It returns true if that entire value exists as an item in a collection. It is case-insensitive and is not limited to strings. <code>-CContains</code> is the case-sensitive version. The <code>.Contains()</code> method is a .NET method from ... | 526 | powershell | <h1>What is the difference between -contains vs .contains in powershell script?</h1>
<p>What is the difference between .contains and -contains? One seems case sensitive while the other one is not.</p>
<pre><code>PS C:\WINDOWS\system32> ("jack", "john", "jill").contains("Jill")
False
PS C:\WINDOWS\system32> "ja... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,978 | bash | # What is the difference between -contains vs .contains in powershell script?
What is the difference between .contains and -contains? One seems case sensitive while the other one is not.
```
PS C:\WINDOWS\system32> ("jack", "john", "jill").contains("Jill")
False
PS C:\WINDOWS\system32> "jack", "john", "jill" -conta... | The `-Contains` operator compares one object against a collection. It returns true if that entire value exists as an item in a collection. It is case-insensitive and is not limited to strings. `-CContains` is the case-sensitive version. The `.Contains()` method is a .NET method from the String class. It compares a subs... |
55057778 | How can I split an mp4 video with ffmpeg every time the volume is zero? | 7 | 2019-03-08 06:21:44 | <p>I need to split a video into many smaller videos.
I have tried PySceneDetect and its 2 scene detection methods don't fit my need.</p>
<p>The idea is to trigger a scene cut/break every time the volume is very low, every time audio level is less than a given parameter. I think overall RMS dB volume level is what I me... | 3,347 | 2,904,701 | 2019-03-14 21:09:01 | 55,145,388 | 12 | 2019-03-13 15:19:28 | 266,720 | 2019-03-14 21:09:01 | https://stackoverflow.com/q/55057778 | https://stackoverflow.com/a/55145388 | <p>Use <code>silencedetect</code> audio filter and feed its debugging output to <code>segment</code> output format parameter.</p>
<p>Here is a ready-made script:</p>
<pre><code>#!/bin/bash
IN=$1
OUT=$2
true ${SD_PARAMS:="-55dB:d=0.3"};
true ${MIN_FRAGMENT_DURATION:="20"};
export MIN_FRAGMENT_DURATION
if [ -z "$OUT... | <p>Use <code>silencedetect</code> audio filter and feed its debugging output to <code>segment</code> output format parameter.</p> <p>Here is a ready-made script:</p> <pre><code>#!/bin/bash IN=$1 OUT=$2 true ${SD_PARAMS:="-55dB:d=0.3"}; true ${MIN_FRAGMENT_DURATION:="20"}; export MIN_FRAGMENT_DURATION if [ -z "$OUT... | 387, 3847, 10327 | bash, ffmpeg, sh | <h1>How can I split an mp4 video with ffmpeg every time the volume is zero?</h1>
<p>I need to split a video into many smaller videos.
I have tried PySceneDetect and its 2 scene detection methods don't fit my need.</p>
<p>The idea is to trigger a scene cut/break every time the volume is very low, every time audio level... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,979 | bash | # How can I split an mp4 video with ffmpeg every time the volume is zero?
I need to split a video into many smaller videos.
I have tried PySceneDetect and its 2 scene detection methods don't fit my need.
The idea is to trigger a scene cut/break every time the volume is very low, every time audio level is less than a ... | Use `silencedetect` audio filter and feed its debugging output to `segment` output format parameter.
Here is a ready-made script:
```
#!/bin/bash
IN=$1
OUT=$2
true ${SD_PARAMS:="-55dB:d=0.3"};
true ${MIN_FRAGMENT_DURATION:="20"};
export MIN_FRAGMENT_DURATION
if [ -z "$OUT" ]; then
echo "Usage: split_by_silence... |
52229808 | Azure Cloud Shell Trouble running ps1 Scripts | 7 | 2018-09-07 21:26:34 | <p>In our Azure Cloud Shell, Powershell mode we can't run ps1 files. Although we are doing the same asin the MS Doc.
Any Suggestions, what am I doing wrong.</p>
<pre><code> PS Azure:\> dir
Directory: Azure:/Shared PAAS – Test/StorageAccounts/tstoweuyptobi/Files/azureshellfiles/goal0402preprod/powershell
... | 6,375 | 7,568,316 | 2019-05-27 22:27:32 | 53,260,864 | 12 | 2018-11-12 11:07:40 | 1,820,890 | 2018-11-12 11:07:40 | https://stackoverflow.com/q/52229808 | https://stackoverflow.com/a/53260864 | <p>The example below is from <a href="https://github.com/MicrosoftDocs/azure-docs/blob/master/articles/cloud-shell/quickstart-powershell.md" rel="noreferrer">Microsoft Docs</a>.
The trick is for the shell to be open in the location that the script is saved.
This will only work if your script doesn't use libraries that... | <p>The example below is from <a href="https://github.com/MicrosoftDocs/azure-docs/blob/master/articles/cloud-shell/quickstart-powershell.md" rel="noreferrer">Microsoft Docs</a>. The trick is for the shell to be open in the location that the script is saved. This will only work if your script doesn't use libraries that... | 126343 | azure-cloud-shell | <h1>Azure Cloud Shell Trouble running ps1 Scripts</h1>
<p>In our Azure Cloud Shell, Powershell mode we can't run ps1 files. Although we are doing the same asin the MS Doc.
Any Suggestions, what am I doing wrong.</p>
<pre><code> PS Azure:\> dir
Directory: Azure:/Shared PAAS – Test/StorageAccounts/tstoweuypt... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,980 | bash | # Azure Cloud Shell Trouble running ps1 Scripts
In our Azure Cloud Shell, Powershell mode we can't run ps1 files. Although we are doing the same asin the MS Doc.
Any Suggestions, what am I doing wrong.
```
PS Azure:\> dir
Directory: Azure:/Shared PAAS – Test/StorageAccounts/tstoweuyptobi/Files/azureshellfil... | The example below is from [Microsoft Docs](https://github.com/MicrosoftDocs/azure-docs/blob/master/articles/cloud-shell/quickstart-powershell.md).
The trick is for the shell to be open in the location that the script is saved.
This will only work if your script doesn't use libraries that are stored on your local device... |
53069551 | Is there a way in .bash_profile, to create two aliases that do the same thing? | 7 | 2018-10-30 17:11:50 | <p>I have some simple aliases in my <code>.bash_profile</code> (OS X El Capitan, 10.11.6). Sometimes, I want multiple aliases that do the same thing. I have, for example, a folder that is my starting point for programming projects. Currently, I have an alias for code and one for programming that do the same thing: </p>... | 2,176 | 1,267,195 | 2018-10-30 23:56:43 | 53,074,458 | 12 | 2018-10-30 23:56:43 | 1,899,640 | 2018-10-30 23:56:43 | https://stackoverflow.com/q/53069551 | https://stackoverflow.com/a/53074458 | <blockquote>
<p>In short, is there something like this?</p>
<p><code>alias code,programming='cd /path/to/Programming/; clear; pwd; ls'</code></p>
</blockquote>
<p>Yes, brace expansion:</p>
<pre><code>alias {code,programming}='cd /path/to/Programming/; clear; pwd; ls'
</code></pre>
| <blockquote> <p>In short, is there something like this?</p> <p><code>alias code,programming='cd /path/to/Programming/; clear; pwd; ls'</code></p> </blockquote> <p>Yes, brace expansion:</p> <pre><code>alias {code,programming}='cd /path/to/Programming/; clear; pwd; ls' </code></pre> | 369, 387, 1448 | alias, bash, macos | <h1>Is there a way in .bash_profile, to create two aliases that do the same thing?</h1>
<p>I have some simple aliases in my <code>.bash_profile</code> (OS X El Capitan, 10.11.6). Sometimes, I want multiple aliases that do the same thing. I have, for example, a folder that is my starting point for programming projects. ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,981 | bash | # Is there a way in .bash_profile, to create two aliases that do the same thing?
I have some simple aliases in my `.bash_profile` (OS X El Capitan, 10.11.6). Sometimes, I want multiple aliases that do the same thing. I have, for example, a folder that is my starting point for programming projects. Currently, I have an... | > In short, is there something like this?
>
> `alias code,programming='cd /path/to/Programming/; clear; pwd; ls'`
Yes, brace expansion:
```
alias {code,programming}='cd /path/to/Programming/; clear; pwd; ls'
``` |
52862376 | What is the difference between `cat |` and `<` | 7 | 2018-10-17 19:35:09 | <p>I'd like to send the contents of <code>filename</code> to <code>some_cmd</code> on the command line. What's the difference between running this:</p>
<pre><code>$ cat filename | some_cmd
</code></pre>
<p>and</p>
<pre><code>$ some_cmd < filename
</code></pre>
<p>Are there cases where I can or should use one and... | 1,304 | 7,327,755 | 2018-10-18 03:10:06 | 52,862,425 | 12 | 2018-10-17 19:38:52 | 14,122 | 2018-10-17 19:58:31 | https://stackoverflow.com/q/52862376 | https://stackoverflow.com/a/52862425 | <ul>
<li><p><code>cat foo | somecmd</code> is running two programs—<code>/bin/cat</code>, and <code>somecmd</code>; and connecting the stdout of <code>cat</code> to the stdin of <code>somecmd</code> with a FIFO—which can be read only once, from start to back. That FIFO also doesn't expose metadata about the original fi... | <ul> <li><p><code>cat foo | somecmd</code> is running two programs—<code>/bin/cat</code>, and <code>somecmd</code>; and connecting the stdout of <code>cat</code> to the stdin of <code>somecmd</code> with a FIFO—which can be read only once, from start to back. That FIFO also doesn't expose metadata about the original fi... | 34, 58, 387, 5813, 26698 | bash, io-redirection, linux, pipe, unix | <h1>What is the difference between `cat |` and `<`</h1>
<p>I'd like to send the contents of <code>filename</code> to <code>some_cmd</code> on the command line. What's the difference between running this:</p>
<pre><code>$ cat filename | some_cmd
</code></pre>
<p>and</p>
<pre><code>$ some_cmd < filename
</code></pr... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,982 | bash | # What is the difference between `cat |` and `<`
I'd like to send the contents of `filename` to `some_cmd` on the command line. What's the difference between running this:
```
$ cat filename | some_cmd
```
and
```
$ some_cmd < filename
```
Are there cases where I can or should use one and not the other? | - `cat foo | somecmd` is running two programs—`/bin/cat`, and `somecmd`; and connecting the stdout of `cat` to the stdin of `somecmd` with a FIFO—which can be read only once, from start to back. That FIFO also doesn't expose metadata about the original file—neither its name nor its size can be discovered by `somecmd` (... |
51363155 | Is it possible to write shell command within Pharo smalltalk? | 7 | 2018-07-16 13:35:38 | <p>Like in other programming language, is there a way of running linux shell command in Pharo smalltalk or a simple script ? I would like to have my Pharo image running a script that should be able to automate a tasks and return it to some value. I looked at almost all the documentation around and I couldn't find anyth... | 1,921 | 8,895,287 | 2023-12-27 11:43:21 | 51,375,906 | 12 | 2018-07-17 07:45:30 | 6,059,896 | 2021-03-29 08:13:05 | https://stackoverflow.com/q/51363155 | https://stackoverflow.com/a/51375906 | <p>Pharo does allow the OS interaction. The best way, in my eyes, is to use <code>OSProcess</code> (as <a href="http://stackoverflow.com/users/2012262/martinw">MartinW</a> already suggested).</p>
<p>Those that think it is a duplicate are missing this part:</p>
<blockquote>
<p>... running a script that should be able t... | <p>Pharo does allow the OS interaction. The best way, in my eyes, is to use <code>OSProcess</code> (as <a href="http://stackoverflow.com/users/2012262/martinw">MartinW</a> already suggested).</p> <p>Those that think it is a duplicate are missing this part:</p> <blockquote> <p>... running a script that should be able t... | 58, 390, 3186, 24949, 125535 | linux, pharo, pharo-5, shell, smalltalk | <h1>Is it possible to write shell command within Pharo smalltalk?</h1>
<p>Like in other programming language, is there a way of running linux shell command in Pharo smalltalk or a simple script ? I would like to have my Pharo image running a script that should be able to automate a tasks and return it to some value. I ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,983 | bash | # Is it possible to write shell command within Pharo smalltalk?
Like in other programming language, is there a way of running linux shell command in Pharo smalltalk or a simple script ? I would like to have my Pharo image running a script that should be able to automate a tasks and return it to some value. I looked at... | Pharo does allow the OS interaction. The best way, in my eyes, is to use `OSProcess` (as [MartinW](http://stackoverflow.com/users/2012262/martinw) already suggested).
Those that think it is a duplicate are missing this part:
> ... running a script that should be able to automate a tasks and
> return it to some value.... |
50768918 | Using a shell script to replace tokens in a file | 7 | 2018-06-08 22:00:36 | <p>I have a file that holds token variables. When we switch environments we want to replace those tokens correctly for the environment we're in.</p>
<p>How can I do this in a Linux shell? I'm thinking awk or sed.</p>
<p>Example:</p>
<p>File has this data:</p>
<pre><code>DB_HOST=__HOST__
DB_PASSWORD=__PASSWORD__
</c... | 10,601 | 4,484,623 | 2023-02-16 20:29:39 | 50,769,355 | 12 | 2018-06-08 22:58:30 | 1,566,221 | 2018-06-11 14:38:49 | https://stackoverflow.com/q/50768918 | https://stackoverflow.com/a/50769355 | <p>The program <code>envsubst</code> was designed for roughly this purpose, but it wants to to use standard shell format for the strings to be substituted from the environment:</p>
<pre><code># Here-doc delimiter quoted to avoid having the shell do the substitutions
$ HOST=myhost PASSWORD=secret envsubst <<"EOF"... | <p>The program <code>envsubst</code> was designed for roughly this purpose, but it wants to to use standard shell format for the strings to be substituted from the environment:</p> <pre><code># Here-doc delimiter quoted to avoid having the shell do the substitutions $ HOST=myhost PASSWORD=secret envsubst <<"EOF"... | 58, 387, 390, 990, 5282 | awk, bash, linux, sed, shell | <h1>Using a shell script to replace tokens in a file</h1>
<p>I have a file that holds token variables. When we switch environments we want to replace those tokens correctly for the environment we're in.</p>
<p>How can I do this in a Linux shell? I'm thinking awk or sed.</p>
<p>Example:</p>
<p>File has this data:</p>... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,984 | bash | # Using a shell script to replace tokens in a file
I have a file that holds token variables. When we switch environments we want to replace those tokens correctly for the environment we're in.
How can I do this in a Linux shell? I'm thinking awk or sed.
Example:
File has this data:
```
DB_HOST=__HOST__
DB_PASSWORD... | The program `envsubst` was designed for roughly this purpose, but it wants to to use standard shell format for the strings to be substituted from the environment:
```
# Here-doc delimiter quoted to avoid having the shell do the substitutions
$ HOST=myhost PASSWORD=secret envsubst <<"EOF"
DB_HOST=$HOST
DB_PASSWORD=${PA... |
40179884 | Adding .inf drivers using PowerShell, possible? | 7 | 2016-10-21 14:59:23 | <p>Are we able to install drivers via their .inf files etc. using a PowerShell cmdlet? When Googling I found, Add-WindowsDriver but I think this one is for an offline Windows image. Does that mean an image that is not currently used on an OS? If not, please teach me how to write the parameters. Thank you!</p>
| 56,176 | 6,466,972 | 2024-05-30 15:13:27 | 50,515,657 | 12 | 2018-05-24 18:10:30 | 9,842,659 | 2018-05-24 18:18:24 | https://stackoverflow.com/q/40179884 | https://stackoverflow.com/a/50515657 | <p>This PowerShell script will do what you want:</p>
<pre><code>Get-ChildItem "C:\Driver File Location" -Recurse -Filter "*inf" | ForEach-Object { PNPUtil.exe /add-driver $_.FullName /install }
</code></pre>
| <p>This PowerShell script will do what you want:</p> <pre><code>Get-ChildItem "C:\Driver File Location" -Recurse -Filter "*inf" | ForEach-Object { PNPUtil.exe /add-driver $_.FullName /install } </code></pre> | 526, 2034 | drivers, powershell | <h1>Adding .inf drivers using PowerShell, possible?</h1>
<p>Are we able to install drivers via their .inf files etc. using a PowerShell cmdlet? When Googling I found, Add-WindowsDriver but I think this one is for an offline Windows image. Does that mean an image that is not currently used on an OS? If not, please teach... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,985 | bash | # Adding .inf drivers using PowerShell, possible?
Are we able to install drivers via their .inf files etc. using a PowerShell cmdlet? When Googling I found, Add-WindowsDriver but I think this one is for an offline Windows image. Does that mean an image that is not currently used on an OS? If not, please teach me how t... | This PowerShell script will do what you want:
```
Get-ChildItem "C:\Driver File Location" -Recurse -Filter "*inf" | ForEach-Object { PNPUtil.exe /add-driver $_.FullName /install }
``` |
48864295 | Powershell: convert a fraction to an integer - surprising rounding behavior | 7 | 2018-02-19 10:40:02 | <p>I have a interesting question on ints with decimals. </p>
<p>Assuming I do the following: </p>
<pre><code>[int] $a = 5/2
$a
</code></pre>
<p>I've tried it 10 times to be sure, and powershell always returns <code>2</code></p>
<p>Is there a way to force Powershell to round up or down in such circumstances and by d... | 7,680 | 8,538,746 | 2023-12-18 01:50:10 | 48,864,546 | 12 | 2018-02-19 10:53:32 | 6,947,281 | 2018-02-19 11:08:57 | https://stackoverflow.com/q/48864295 | https://stackoverflow.com/a/48864546 | <pre><code>[Math]::Floor($a) --> 2
[Math]::Ceiling($a)--> 3
[Math]::Round($a) --> 2
</code></pre>
<p><code>Floor</code> will give you the preceding whole number and <code>Ceiling</code> will be providing the succeeding whole number.
But if you want to round it up, using the <code>Round</code> function, it wi... | <pre><code>[Math]::Floor($a) --> 2 [Math]::Ceiling($a)--> 3 [Math]::Round($a) --> 2 </code></pre> <p><code>Floor</code> will give you the preceding whole number and <code>Ceiling</code> will be providing the succeeding whole number. But if you want to round it up, using the <code>Round</code> function, it wi... | 526, 2054, 2754, 8690, 9069 | bankers-rounding, casting, integer, powershell, rounding | <h1>Powershell: convert a fraction to an integer - surprising rounding behavior</h1>
<p>I have a interesting question on ints with decimals. </p>
<p>Assuming I do the following: </p>
<pre><code>[int] $a = 5/2
$a
</code></pre>
<p>I've tried it 10 times to be sure, and powershell always returns <code>2</code></p>
<p>... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,986 | bash | # Powershell: convert a fraction to an integer - surprising rounding behavior
I have a interesting question on ints with decimals.
Assuming I do the following:
```
[int] $a = 5/2
$a
```
I've tried it 10 times to be sure, and powershell always returns `2`
Is there a way to force Powershell to round up or down in su... | ```
[Math]::Floor($a) --> 2
[Math]::Ceiling($a)--> 3
[Math]::Round($a) --> 2
```
`Floor` will give you the preceding whole number and `Ceiling` will be providing the succeeding whole number.
But if you want to round it up, using the `Round` function, it will follow midpoint rounding (**Rounding at midpoint is historic... |
47042350 | BASH: Count identical lines | 7 | 2017-10-31 18:33:22 | <p>I have a file that contains:</p>
<pre><code>VoicemailButtonTest
VoicemailButtonTest
VoicemailButtonTest
VoicemailButtonTest
VoicemailButtonTest
VoiceMailConfig60CharsTest
VoicemailDefaultTypeTest
VoiceMailIconSelectableTest
VoiceMailIconSelectableTest
VoiceMailIconSelectableTest
VoiceMailIconSelectableTest
VoiceMai... | 8,382 | 2,340,022 | 2017-10-31 23:45:32 | 47,042,520 | 12 | 2017-10-31 18:44:30 | 7,116,369 | 2017-10-31 18:44:30 | https://stackoverflow.com/q/47042350 | https://stackoverflow.com/a/47042520 | <p>Assuming the formatting of the output doesn't exactly have to match</p>
<pre><code>VoicemailButtonTest (5)
VoiceMailConfig60CharsTest (1)
VoicemailDefaultTypeTest (1)
VoiceMailIconSelectableTest (5)
VoicemailSettingsFromMessageModeScreenTest (2)
VoicemailSettingsTest (7)
</code></pre>
<p>you can just use</p>
<pre... | <p>Assuming the formatting of the output doesn't exactly have to match</p> <pre><code>VoicemailButtonTest (5) VoiceMailConfig60CharsTest (1) VoicemailDefaultTypeTest (1) VoiceMailIconSelectableTest (5) VoicemailSettingsFromMessageModeScreenTest (2) VoicemailSettingsTest (7) </code></pre> <p>you can just use</p> <pre... | 387, 990, 5282, 12147, 29837 | awk, bash, duplicates, line-count, sed | <h1>BASH: Count identical lines</h1>
<p>I have a file that contains:</p>
<pre><code>VoicemailButtonTest
VoicemailButtonTest
VoicemailButtonTest
VoicemailButtonTest
VoicemailButtonTest
VoiceMailConfig60CharsTest
VoicemailDefaultTypeTest
VoiceMailIconSelectableTest
VoiceMailIconSelectableTest
VoiceMailIconSelectableTest... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,987 | bash | # BASH: Count identical lines
I have a file that contains:
```
VoicemailButtonTest
VoicemailButtonTest
VoicemailButtonTest
VoicemailButtonTest
VoicemailButtonTest
VoiceMailConfig60CharsTest
VoicemailDefaultTypeTest
VoiceMailIconSelectableTest
VoiceMailIconSelectableTest
VoiceMailIconSelectableTest
VoiceMailIconSelect... | Assuming the formatting of the output doesn't exactly have to match
```
VoicemailButtonTest (5)
VoiceMailConfig60CharsTest (1)
VoicemailDefaultTypeTest (1)
VoiceMailIconSelectableTest (5)
VoicemailSettingsFromMessageModeScreenTest (2)
VoicemailSettingsTest (7)
```
you can just use
```
sort <input_file> | uniq -c
```... |
46808635 | How to hide the PowerShell window when running a .ps1 script in Task Scheduler? | 7 | 2017-10-18 10:59:54 | <p>I am trying to run a PowerShell script using Task Scheduler and it pops up a PowerShell command console window.</p>
<p>Is there a way to disable this while running the script and hide the window?</p>
<p>I've tried <code>-WindowStyle Hidden</code> but the PowerShell command console window still pops up.</p>
| 15,277 | 8,427,443 | 2025-03-21 19:31:48 | 46,814,849 | 12 | 2017-10-18 16:22:54 | 2,102,693 | 2017-10-18 16:48:10 | https://stackoverflow.com/q/46808635 | https://stackoverflow.com/a/46814849 | <p>Since <code>powershell.exe</code> is a console program, you can't execute it normally without its console window appearing (although you can hide it shortly after it starts by using <code>-WindowStyle Hidden</code>, as you have noted).</p>
<p>The trick is to execute <code>powershell.exe</code> <em>itself</em> in a ... | <p>Since <code>powershell.exe</code> is a console program, you can't execute it normally without its console window appearing (although you can hide it shortly after it starts by using <code>-WindowStyle Hidden</code>, as you have noted).</p> <p>The trick is to execute <code>powershell.exe</code> <em>itself</em> in a ... | 64, 526, 37086 | powershell, windows, window-style | <h1>How to hide the PowerShell window when running a .ps1 script in Task Scheduler?</h1>
<p>I am trying to run a PowerShell script using Task Scheduler and it pops up a PowerShell command console window.</p>
<p>Is there a way to disable this while running the script and hide the window?</p>
<p>I've tried <code>-WindowS... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,988 | bash | # How to hide the PowerShell window when running a .ps1 script in Task Scheduler?
I am trying to run a PowerShell script using Task Scheduler and it pops up a PowerShell command console window.
Is there a way to disable this while running the script and hide the window?
I've tried `-WindowStyle Hidden` but the Power... | Since `powershell.exe` is a console program, you can't execute it normally without its console window appearing (although you can hide it shortly after it starts by using `-WindowStyle Hidden`, as you have noted).
The trick is to execute `powershell.exe` *itself* in a hidden state. One way to do this is by using the W... |
46388010 | How to connect to linux server using ssh with private key from PowerShell? | 7 | 2017-09-24 08:15:07 | <p>I have generated an ssh key pair using puttygen and can successfully connect to my CentOS server with my private key from putty on my Windows 10 workstation:</p>
<p><a href="https://i.sstatic.net/cJ4fj.png" rel="noreferrer"><img src="https://i.sstatic.net/cJ4fj.png" alt="image of successful connection to CentOS"></... | 27,763 | 38,211 | 2021-12-29 22:14:18 | 46,390,166 | 12 | 2017-09-24 12:45:19 | 1,630,171 | 2017-09-24 12:45:19 | https://stackoverflow.com/q/46388010 | https://stackoverflow.com/a/46390166 | <p><code>New-SSHSession</code> doesn't recognize PuTTY's key format (unfortunately neither the Gallery nor the project page mention this, but I found it in a <a href="http://www.powershellmagazine.com/2014/07/03/posh-ssh-open-source-ssh-powershell-module/" rel="noreferrer">PowerShellMagazine article</a>). You need the ... | <p><code>New-SSHSession</code> doesn't recognize PuTTY's key format (unfortunately neither the Gallery nor the project page mention this, but I found it in a <a href="http://www.powershellmagazine.com/2014/07/03/posh-ssh-open-source-ssh-powershell-module/" rel="noreferrer">PowerShellMagazine article</a>). You need the ... | 386, 526, 108010 | powershell, powershell-5.0, ssh | <h1>How to connect to linux server using ssh with private key from PowerShell?</h1>
<p>I have generated an ssh key pair using puttygen and can successfully connect to my CentOS server with my private key from putty on my Windows 10 workstation:</p>
<p><a href="https://i.sstatic.net/cJ4fj.png" rel="noreferrer"><img src... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,989 | bash | # How to connect to linux server using ssh with private key from PowerShell?
I have generated an ssh key pair using puttygen and can successfully connect to my CentOS server with my private key from putty on my Windows 10 workstation:
[](http... | `New-SSHSession` doesn't recognize PuTTY's key format (unfortunately neither the Gallery nor the project page mention this, but I found it in a [PowerShellMagazine article](http://www.powershellmagazine.com/2014/07/03/posh-ssh-open-source-ssh-powershell-module/)). You need the private key in the OpenSSH format. You can... |
45607911 | LDAP query in PowerShell | 7 | 2017-08-10 08:07:28 | <p>I'm trying to run the below query in PowerShell with no success :(</p>
<pre><code>((mailNickname=id*)(whenChanged>=20170701000000.0Z))(|(userAccountControl=514)(userAccountControl=66050))(|(memberof=CN=VPN,OU=VpnAccess,OU=Domain Global,OU=Groups,OU=01,DC=em,DC=pl,DC=ad,DC=mnl)(memberof=CN=VPN-2,OU=VpnAccess,OU=Do... | 156,267 | 5,366,549 | 2021-04-08 00:07:55 | 45,608,229 | 12 | 2017-08-10 08:23:48 | 712,649 | 2017-08-10 08:23:48 | https://stackoverflow.com/q/45607911 | https://stackoverflow.com/a/45608229 | <p>Given the contents of the query filter, I'd say you're looking for a user, so I'd suggest using the <code>Get-ADUser</code> cmdlet from the ActiveDirectory RSAT module:</p>
<pre><code>Get-ADUser -LDAPFilter '((mailNickname=id*)(whenChanged>=20170701000000.0Z))(|(userAccountControl=514)(userAccountControl=66050))... | <p>Given the contents of the query filter, I'd say you're looking for a user, so I'd suggest using the <code>Get-ADUser</code> cmdlet from the ActiveDirectory RSAT module:</p> <pre><code>Get-ADUser -LDAPFilter '((mailNickname=id*)(whenChanged>=20170701000000.0Z))(|(userAccountControl=514)(userAccountControl=66050))... | 526, 10401 | active-directory, powershell | <h1>LDAP query in PowerShell</h1>
<p>I'm trying to run the below query in PowerShell with no success :(</p>
<pre><code>((mailNickname=id*)(whenChanged>=20170701000000.0Z))(|(userAccountControl=514)(userAccountControl=66050))(|(memberof=CN=VPN,OU=VpnAccess,OU=Domain Global,OU=Groups,OU=01,DC=em,DC=pl,DC=ad,DC=mnl)(me... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,990 | bash | # LDAP query in PowerShell
I'm trying to run the below query in PowerShell with no success :(
```
((mailNickname=id*)(whenChanged>=20170701000000.0Z))(|(userAccountControl=514)(userAccountControl=66050))(|(memberof=CN=VPN,OU=VpnAccess,OU=Domain Global,OU=Groups,OU=01,DC=em,DC=pl,DC=ad,DC=mnl)(memberof=CN=VPN-2,OU=Vpn... | Given the contents of the query filter, I'd say you're looking for a user, so I'd suggest using the `Get-ADUser` cmdlet from the ActiveDirectory RSAT module:
```
Get-ADUser -LDAPFilter '((mailNickname=id*)(whenChanged>=20170701000000.0Z))(|(userAccountControl=514)(userAccountControl=66050))(|(memberof=CN=VPN,OU=VpnAcc... |
44781847 | How to disassemble a shellcode into assembly instruction? | 7 | 2017-06-27 13:41:18 | <p>Is there some tool to disassemble a raw hex into assembly instructions? for example: lets say we have <b>\xeb\x1d</b> that disassemble into <b>jmp 0x1f</b> according to <a href="http://shell-storm.org/online/Online-Assembler-and-Disassembler/" rel="noreferrer">this</a> online disassembler. So is there some offline t... | 14,512 | 8,016,875 | 2017-06-27 15:05:13 | 44,783,138 | 12 | 2017-06-27 14:38:51 | 3,857,942 | 2017-06-27 15:05:13 | https://stackoverflow.com/q/44781847 | https://stackoverflow.com/a/44783138 | <p>As the comments have suggested, your issue is that you have output the string <code>\xeb\x1d</code> as ASCII into the file you are trying to disassemble. You may have done something like:</p>
<pre><code>echo '\xeb\x1d' >foo
</code></pre>
<p>You can do this but you will want to tell <code>echo</code> to interpre... | <p>As the comments have suggested, your issue is that you have output the string <code>\xeb\x1d</code> as ASCII into the file you are trying to disassemble. You may have done something like:</p> <pre><code>echo '\xeb\x1d' >foo </code></pre> <p>You can do this but you will want to tell <code>echo</code> to interpre... | 823, 824, 19688, 78469 | assembly, disassembly, shellcode, x86 | <h1>How to disassemble a shellcode into assembly instruction?</h1>
<p>Is there some tool to disassemble a raw hex into assembly instructions? for example: lets say we have <b>\xeb\x1d</b> that disassemble into <b>jmp 0x1f</b> according to <a href="http://shell-storm.org/online/Online-Assembler-and-Disassembler/" rel="n... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,991 | bash | # How to disassemble a shellcode into assembly instruction?
Is there some tool to disassemble a raw hex into assembly instructions? for example: lets say we have **\xeb\x1d** that disassemble into **jmp 0x1f** according to [this](http://shell-storm.org/online/Online-Assembler-and-Disassembler/) online disassembler. So... | As the comments have suggested, your issue is that you have output the string `\xeb\x1d` as ASCII into the file you are trying to disassemble. You may have done something like:
```
echo '\xeb\x1d' >foo
```
You can do this but you will want to tell `echo` to interpret the escape character `\`. This can be done with th... |
44676356 | How to wrap quotes around variable value in bash? | 7 | 2017-06-21 12:37:14 | <p>I have a variable</p>
<pre><code>test=value.txt
</code></pre>
<p>I am using test as</p>
<pre><code>$test
</code></pre>
<p>which gives me </p>
<pre><code>value.txt
</code></pre>
<p>I want result as</p>
<pre><code>'value.txt'
</code></pre>
<p>How can I achieve this?</p>
<p><strong>Edit:</strong>
Above is just... | 33,239 | 6,534,673 | 2017-06-21 13:43:17 | 44,677,719 | 12 | 2017-06-21 13:36:01 | 6,309,601 | 2017-06-21 13:37:33 | https://stackoverflow.com/q/44676356 | https://stackoverflow.com/a/44677719 | <p>Assignment using string:</p>
<pre><code>test="'value.txt'"
echo "$test"
'value.txt'
</code></pre>
<p>Assignment using variable:</p>
<pre><code>var=value.txt
test="'$var'"
echo "$test"
'value.txt'
</code></pre>
| <p>Assignment using string:</p> <pre><code>test="'value.txt'" echo "$test" 'value.txt' </code></pre> <p>Assignment using variable:</p> <pre><code>var=value.txt test="'$var'" echo "$test" 'value.txt' </code></pre> | 387 | bash | <h1>How to wrap quotes around variable value in bash?</h1>
<p>I have a variable</p>
<pre><code>test=value.txt
</code></pre>
<p>I am using test as</p>
<pre><code>$test
</code></pre>
<p>which gives me </p>
<pre><code>value.txt
</code></pre>
<p>I want result as</p>
<pre><code>'value.txt'
</code></pre>
<p>How can I... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,992 | bash | # How to wrap quotes around variable value in bash?
I have a variable
```
test=value.txt
```
I am using test as
```
$test
```
which gives me
```
value.txt
```
I want result as
```
'value.txt'
```
How can I achieve this?
**Edit:**
Above is just an example of the task I am trying to achieve. I can't change vari... | Assignment using string:
```
test="'value.txt'"
echo "$test"
'value.txt'
```
Assignment using variable:
```
var=value.txt
test="'$var'"
echo "$test"
'value.txt'
``` |
43001805 | What's the difference between 'eval $command' and $command? | 7 | 2017-03-24 14:15:38 | <p>What's the difference between:</p>
<pre><code>eval echo lala
</code></pre>
<p>and:</p>
<pre><code>command="echo lala"
$command
</code></pre>
<p>They both seem to have the same effect but I might be missing something. Also, if they <strong>do</strong> have the same effect, what's the point of <code>eval</code> co... | 5,272 | 1,030,598 | 2022-03-28 09:23:40 | 43,002,154 | 12 | 2017-03-24 14:31:09 | 4,323 | 2022-03-28 09:23:40 | https://stackoverflow.com/q/43001805 | https://stackoverflow.com/a/43002154 | <p>Try this:</p>
<pre><code>y='FOO=hello; echo $FOO'
eval $y
</code></pre>
<p>It prints <code>hello</code>.</p>
<p>But this:</p>
<pre><code>$y
</code></pre>
<p>says:</p>
<blockquote>
<p>-bash: FOO=hello;: command not found</p>
</blockquote>
<p>So when you say <code>eval $y</code> it is just as if you had typed the cont... | <p>Try this:</p> <pre><code>y='FOO=hello; echo $FOO' eval $y </code></pre> <p>It prints <code>hello</code>.</p> <p>But this:</p> <pre><code>$y </code></pre> <p>says:</p> <blockquote> <p>-bash: FOO=hello;: command not found</p> </blockquote> <p>So when you say <code>eval $y</code> it is just as if you had typed the cont... | 387, 4413 | bash, eval | <h1>What's the difference between 'eval $command' and $command?</h1>
<p>What's the difference between:</p>
<pre><code>eval echo lala
</code></pre>
<p>and:</p>
<pre><code>command="echo lala"
$command
</code></pre>
<p>They both seem to have the same effect but I might be missing something. Also, if they <strong>do</s... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,993 | bash | # What's the difference between 'eval $command' and $command?
What's the difference between:
```
eval echo lala
```
and:
```
command="echo lala"
$command
```
They both seem to have the same effect but I might be missing something. Also, if they **do** have the same effect, what's the point of `eval` command? | Try this:
```
y='FOO=hello; echo $FOO'
eval $y
```
It prints `hello`.
But this:
```
$y
```
says:
> -bash: FOO=hello;: command not found
So when you say `eval $y` it is just as if you had typed the content of `$y` into the interpreter. But when you just say `$y` it needs to be a command that can be run, rather th... |
39474047 | sudo command on MacOS Sierra does not respect timestamp_timeout | 7 | 2016-09-13 15:41:30 | <p>After upgrading to MacOS Sierra (10.12), my <code>sudo</code> command seems to be acting differently. See the following test case:</p>
<pre><code># Run in terminal pane #1: (should prompt for password)
sudo -v
# Run in terminal pane #2: (should NOT prompt for password)
sudo -v
</code></pre>
<p>The above works as ... | 6,231 | 3,247,081 | 2017-01-11 17:37:48 | 39,474,612 | 12 | 2016-09-13 16:11:29 | 3,247,081 | 2016-09-13 16:11:29 | https://stackoverflow.com/q/39474047 | https://stackoverflow.com/a/39474612 | <p>After a ton of searching and comparing the <code>sudo</code> configuration on older OS versions to Sierra's (<code>sudo su; sudo -V</code>), it seems that Sierra enables <code>tty_tickets</code> by default now, causing the issues mentioned above. As far as I can tell, this was an undocumented change. To fix, the fol... | <p>After a ton of searching and comparing the <code>sudo</code> configuration on older OS versions to Sierra's (<code>sudo su; sudo -V</code>), it seems that Sierra enables <code>tty_tickets</code> by default now, causing the issues mentioned above. As far as I can tell, this was an undocumented change. To fix, the fol... | 390, 1674, 120355 | macos-sierra, shell, sudo | <h1>sudo command on MacOS Sierra does not respect timestamp_timeout</h1>
<p>After upgrading to MacOS Sierra (10.12), my <code>sudo</code> command seems to be acting differently. See the following test case:</p>
<pre><code># Run in terminal pane #1: (should prompt for password)
sudo -v
# Run in terminal pane #2: (shou... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,994 | bash | # sudo command on MacOS Sierra does not respect timestamp_timeout
After upgrading to MacOS Sierra (10.12), my `sudo` command seems to be acting differently. See the following test case:
```
# Run in terminal pane #1: (should prompt for password)
sudo -v
# Run in terminal pane #2: (should NOT prompt for password)
sud... | After a ton of searching and comparing the `sudo` configuration on older OS versions to Sierra's (`sudo su; sudo -V`), it seems that Sierra enables `tty_tickets` by default now, causing the issues mentioned above. As far as I can tell, this was an undocumented change. To fix, the following needs to be added to the `/et... |
38555554 | Why is nvm command installed as root and also not found during vagrant bootstrap.sh? | 7 | 2016-07-24 18:47:44 | <p>When I try to install nvm and test that it's installed in my vagrant shell provisioning script, using:</p>
<pre><code>sudo wget -qO- https://raw.githubusercontent.com/creationix/nvm/v0.31.3/install.sh | bash
source ~/.bashrc
nvm
</code></pre>
<p>I get:</p>
<pre><code>==> default: => Downloading nvm as scrip... | 1,475 | 579,046 | 2016-07-24 18:49:57 | 38,555,578 | 12 | 2016-07-24 18:49:57 | 579,046 | 2016-07-24 18:49:57 | https://stackoverflow.com/q/38555554 | https://stackoverflow.com/a/38555578 | <p>So first if you want to install somethnig as the vagrant user during a bootstrap.sh script, the easiest way to do that is to add another provisioner script to your Vagrantfile which is run in unprivileged mode:</p>
<pre><code>config.vm.provision "ScriptRunAsRoot", type:"shell", path: "Vagrantdata/rootUserBootstrap.... | <p>So first if you want to install somethnig as the vagrant user during a bootstrap.sh script, the easiest way to do that is to add another provisioner script to your Vagrantfile which is run in unprivileged mode:</p> <pre><code>config.vm.provision "ScriptRunAsRoot", type:"shell", path: "Vagrantdata/rootUserBootstrap.... | 387, 46426, 66981, 81748 | bash, node.js, nvm, vagrant | <h1>Why is nvm command installed as root and also not found during vagrant bootstrap.sh?</h1>
<p>When I try to install nvm and test that it's installed in my vagrant shell provisioning script, using:</p>
<pre><code>sudo wget -qO- https://raw.githubusercontent.com/creationix/nvm/v0.31.3/install.sh | bash
source ~/.bash... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,995 | bash | # Why is nvm command installed as root and also not found during vagrant bootstrap.sh?
When I try to install nvm and test that it's installed in my vagrant shell provisioning script, using:
```
sudo wget -qO- https://raw.githubusercontent.com/creationix/nvm/v0.31.3/install.sh | bash
source ~/.bashrc
nvm
```
I get:
... | So first if you want to install somethnig as the vagrant user during a bootstrap.sh script, the easiest way to do that is to add another provisioner script to your Vagrantfile which is run in unprivileged mode:
```
config.vm.provision "ScriptRunAsRoot", type:"shell", path: "Vagrantdata/rootUserBootstrap.sh"
config.vm.... |
38483711 | npm command not found error but node is installed | 7 | 2016-07-20 14:12:40 | <p>I installed node and npm with Homebrew a while ago, they both worked fine until today when I keep running into the <strong>npm command not found</strong> error. </p>
<p>When is run <strong>$ whereis node</strong>, I get nothing back</p>
<p>When I do <strong>$ which node</strong>, I see <strong>/usr/local/bin/node<... | 41,641 | 4,996,722 | 2019-09-08 16:09:18 | 38,485,208 | 12 | 2016-07-20 15:51:20 | 4,996,722 | 2016-07-20 15:51:20 | https://stackoverflow.com/q/38483711 | https://stackoverflow.com/a/38485208 | <p>Figured out the issue. So the root of the problem was that I installed npm using Homebrew and there are some issues with what goes on under the hood with Homebrew and npm. </p>
<p>To fix this I did the following: </p>
<pre><code>rm -rf /usr/local/lib/node_modules
brew uninstall node
brew install node --without-npm... | <p>Figured out the issue. So the root of the problem was that I installed npm using Homebrew and there are some issues with what goes on under the hood with Homebrew and npm. </p> <p>To fix this I did the following: </p> <pre><code>rm -rf /usr/local/lib/node_modules brew uninstall node brew install node --without-npm... | 387, 1067, 46426, 61387, 115613 | bash, homebrew, node.js, npm, npm-install | <h1>npm command not found error but node is installed</h1>
<p>I installed node and npm with Homebrew a while ago, they both worked fine until today when I keep running into the <strong>npm command not found</strong> error. </p>
<p>When is run <strong>$ whereis node</strong>, I get nothing back</p>
<p>When I do <stron... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,996 | bash | # npm command not found error but node is installed
I installed node and npm with Homebrew a while ago, they both worked fine until today when I keep running into the **npm command not found** error.
When is run **$ whereis node**, I get nothing back
When I do **$ which node**, I see **/usr/local/bin/node**
When I ... | Figured out the issue. So the root of the problem was that I installed npm using Homebrew and there are some issues with what goes on under the hood with Homebrew and npm.
To fix this I did the following:
```
rm -rf /usr/local/lib/node_modules
brew uninstall node
brew install node --without-npm
echo prefix=~/.npm-pac... |
37852378 | How to prompt for both user and password in curl command? | 7 | 2016-06-16 07:18:29 | <p>I am doing a post call to MarkLogic server using CURL command in Ubuntu.</p>
<p>In the command if I'll write like </p>
<pre><code>--user username
</code></pre>
<p>It will prompt for password.</p>
<p>Is there any way to prompt for both username and password?</p>
<p>Basically I don't want to hard code the usernam... | 9,462 | 1,705,390 | 2020-09-29 06:20:14 | 37,853,021 | 12 | 2016-06-16 07:51:28 | 3,933,089 | 2020-09-29 06:20:14 | https://stackoverflow.com/q/37852378 | https://stackoverflow.com/a/37853021 | <p>You'd have to do this in two steps: first read in the username, then use it in your <code>curl</code> command. So in <code>bash</code> it would come out something like this:</p>
<pre><code>read -p "Username: " CURLUSER
curl --user "${CURLUSER}" ...
</code></pre>
<p>If you wanted to, you could wra... | <p>You'd have to do this in two steps: first read in the username, then use it in your <code>curl</code> command. So in <code>bash</code> it would come out something like this:</p> <pre><code>read -p "Username: " CURLUSER curl --user "${CURLUSER}" ... </code></pre> <p>If you wanted to, you could wra... | 58, 390, 549, 1554, 22082 | curl, linux, marklogic, shell, ubuntu | <h1>How to prompt for both user and password in curl command?</h1>
<p>I am doing a post call to MarkLogic server using CURL command in Ubuntu.</p>
<p>In the command if I'll write like </p>
<pre><code>--user username
</code></pre>
<p>It will prompt for password.</p>
<p>Is there any way to prompt for both username an... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,997 | bash | # How to prompt for both user and password in curl command?
I am doing a post call to MarkLogic server using CURL command in Ubuntu.
In the command if I'll write like
```
--user username
```
It will prompt for password.
Is there any way to prompt for both username and password?
Basically I don't want to hard code... | You'd have to do this in two steps: first read in the username, then use it in your `curl` command. So in `bash` it would come out something like this:
```
read -p "Username: " CURLUSER
curl --user "${CURLUSER}" ...
```
If you wanted to, you could wrap this up in a little script, along these lines:
```
#!/bin/bash
r... |
36948220 | Shell REGEX for date | 7 | 2016-04-29 22:10:51 | <p>I am trying to fix the users input if they input an incorrect date format that is not (YYYY-MM-DD) but I cant figure it out. Here is what I have:</p>
<pre><code>while [ "$startDate" != "^[0-9]{4}-[0-9]{2}-[0-9]{2}$" ]
do
echo "Please retype the start date (YYYY-MM-DD):"
read startDate
done
</code></pre>
| 16,024 | 5,514,001 | 2018-03-30 04:29:50 | 36,948,243 | 12 | 2016-04-29 22:12:16 | 1,983,854 | 2016-04-29 22:17:31 | https://stackoverflow.com/q/36948220 | https://stackoverflow.com/a/36948243 | <p>Instead of <code>!=</code>, you have to use <code>! $var =~ regex</code> to perform <a href="https://stackoverflow.com/a/21112809/1983854">regex comparisons</a>:</p>
<pre><code>[[ $date =~ ^[0-9]{4}-[0-9]{2}-[0-9]{2}$ ]]
^^
</code></pre>
<p>So that your script can be like this:</p>
<pre><code>date=""
whi... | <p>Instead of <code>!=</code>, you have to use <code>! $var =~ regex</code> to perform <a href="https://stackoverflow.com/a/21112809/1983854">regex comparisons</a>:</p> <pre><code>[[ $date =~ ^[0-9]{4}-[0-9]{2}-[0-9]{2}$ ]] ^^ </code></pre> <p>So that your script can be like this:</p> <pre><code>date="" whi... | 18, 387, 390, 5002 | bash, date, regex, shell | <h1>Shell REGEX for date</h1>
<p>I am trying to fix the users input if they input an incorrect date format that is not (YYYY-MM-DD) but I cant figure it out. Here is what I have:</p>
<pre><code>while [ "$startDate" != "^[0-9]{4}-[0-9]{2}-[0-9]{2}$" ]
do
echo "Please retype the start date (YYYY-MM-DD):"
read startD... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,998 | bash | # Shell REGEX for date
I am trying to fix the users input if they input an incorrect date format that is not (YYYY-MM-DD) but I cant figure it out. Here is what I have:
```
while [ "$startDate" != "^[0-9]{4}-[0-9]{2}-[0-9]{2}$" ]
do
echo "Please retype the start date (YYYY-MM-DD):"
read startDate
done
``` | Instead of `!=`, you have to use `! $var =~ regex` to perform [regex comparisons](https://stackoverflow.com/a/21112809/1983854):
```
[[ $date =~ ^[0-9]{4}-[0-9]{2}-[0-9]{2}$ ]]
^^
```
So that your script can be like this:
```
date=""
while [[ ! $date =~ ^[0-9]{4}-[0-9]{2}-[0-9]{2}$ ]]; do
echo "enter da... |
35141373 | Toggle IIS Feature Delegation with Powershell | 7 | 2016-02-01 22:10:47 | <p>How can I change IIS "Feature Delegation" using Powershell. I want to change "Authentication - Anonymous" to read/write .
I found this <a href="https://stackoverflow.com/questions/18136128/toggle-iis-7-5-authentication-anonymous-authentication-with-powershell-3-0">Toggle IIS 7.5 Authentication "Anonymous Authe... | 4,529 | 4,199,992 | 2016-02-23 22:50:02 | 35,169,293 | 12 | 2016-02-03 05:38:47 | 4,199,992 | 2016-02-03 05:38:47 | https://stackoverflow.com/q/35141373 | https://stackoverflow.com/a/35169293 | <p>Finally found this link and it helped</p>
<blockquote>
<p><a href="http://forums.iis.net/t/1178408.aspx?PowerShell+command+Feature+Delegation+settings" rel="noreferrer">http://forums.iis.net/t/1178408.aspx?PowerShell+command+Feature+Delegation+settings</a></p>
</blockquote>
<p>Here are few examples.</p>
<pre><c... | <p>Finally found this link and it helped</p> <blockquote> <p><a href="http://forums.iis.net/t/1178408.aspx?PowerShell+command+Feature+Delegation+settings" rel="noreferrer">http://forums.iis.net/t/1178408.aspx?PowerShell+command+Feature+Delegation+settings</a></p> </blockquote> <p>Here are few examples.</p> <pre><c... | 215, 526 | iis, powershell | <h1>Toggle IIS Feature Delegation with Powershell</h1>
<p>How can I change IIS "Feature Delegation" using Powershell. I want to change "Authentication - Anonymous" to read/write .
I found this <a href="https://stackoverflow.com/questions/18136128/toggle-iis-7-5-authentication-anonymous-authentication-with-powershell-3... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,000 | bash | # Toggle IIS Feature Delegation with Powershell
How can I change IIS "Feature Delegation" using Powershell. I want to change "Authentication - Anonymous" to read/write .
I found this [Toggle IIS 7.5 Authentication "Anonymous Authentication" with Powershell 3.0?](https://stackoverflow.com/questions/18136128/toggle-iis-... | Finally found this link and it helped
> <http://forums.iis.net/t/1178408.aspx?PowerShell+command+Feature+Delegation+settings>
Here are few examples.
```
Set-WebConfiguration //System.WebServer/Security/Authentication/anonymousAuthentication
-metadata overrideMode -value Allow -PSPath IIS:/
Set-WebConfiguration //Sy... |
34751930 | Read a python variable in a shell script? | 7 | 2016-01-12 19:12:16 | <p>my python file has these 2 variables:</p>
<pre><code>week_date = "01/03/16-01/09/16"
cust_id = "12345"
</code></pre>
<p>how can i read this into a shell script that takes in these 2 variables?</p>
<p>my current shell script requires manual editing of "dt" and "id". I want to read the python variables into the she... | 12,243 | 2,800,939 | 2023-12-04 07:36:19 | 34,752,001 | 12 | 2016-01-12 19:17:02 | 14,122 | 2023-12-03 22:35:40 | https://stackoverflow.com/q/34751930 | https://stackoverflow.com/a/34752001 | <p>Consider something akin to the following:</p>
<pre class="lang-bash prettyprint-override"><code>#!/bin/bash
# ^^^^ NOT /bin/sh, which doesn't have process substitution available.
python_script='
import sys
d = {} # create a dict to store values in
exec(open(sys.argv[1], "r&... | <p>Consider something akin to the following:</p> <pre class="lang-bash prettyprint-override"><code>#!/bin/bash # ^^^^ NOT /bin/sh, which doesn't have process substitution available. python_script=' import sys d = {} # create a dict to store values in exec(open(sys.argv[1], "r&... | 16, 387, 390 | bash, python, shell | <h1>Read a python variable in a shell script?</h1>
<p>my python file has these 2 variables:</p>
<pre><code>week_date = "01/03/16-01/09/16"
cust_id = "12345"
</code></pre>
<p>how can i read this into a shell script that takes in these 2 variables?</p>
<p>my current shell script requires manual editing of "dt" and "id... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,001 | bash | # Read a python variable in a shell script?
my python file has these 2 variables:
```
week_date = "01/03/16-01/09/16"
cust_id = "12345"
```
how can i read this into a shell script that takes in these 2 variables?
my current shell script requires manual editing of "dt" and "id". I want to read the python variables i... | Consider something akin to the following:
```
#!/bin/bash
# ^^^^ NOT /bin/sh, which doesn't have process substitution available.
python_script='
import sys
d = {} # create a dict to store values in
exec(open(sys.argv[1], "r").read(), d) # exec code with that dict as namespace
for ... |
34522426 | Unable to write on /dev/* files | 7 | 2015-12-30 03:14:22 | <p>I'm writing a basic char device driver for Linux kernel.
For this, the code flow I have considered is as follows:</p>
<ol>
<li><code>alloc_chrdev_region()</code> -> to use dynamic allocation of major number</li>
<li><code>class_create()</code> -> to create device class in sysfs</li>
<li><code>device_creat()<... | 8,400 | 4,204,404 | 2019-02-04 12:44:10 | 34,532,956 | 12 | 2015-12-30 16:07:10 | 5,466,118 | 2015-12-30 16:07:10 | https://stackoverflow.com/q/34522426 | https://stackoverflow.com/a/34532956 | <p>I assume that you are normally not root on your bash shell. Then this command line</p>
<pre><code>sudo echo 54 > /dev/scull
</code></pre>
<p>does not what you think. The command is executed in two steps:</p>
<ol>
<li>The bash setups the output redirection, i.e., it tries to open <code>/dev/scull</code> with th... | <p>I assume that you are normally not root on your bash shell. Then this command line</p> <pre><code>sudo echo 54 > /dev/scull </code></pre> <p>does not what you think. The command is executed in two steps:</p> <ol> <li>The bash setups the output redirection, i.e., it tries to open <code>/dev/scull</code> with th... | 58, 387, 390, 21751, 21990 | bash, linux, linux-device-driver, linux-kernel, shell | <h1>Unable to write on /dev/* files</h1>
<p>I'm writing a basic char device driver for Linux kernel.
For this, the code flow I have considered is as follows:</p>
<ol>
<li><code>alloc_chrdev_region()</code> -> to use dynamic allocation of major number</li>
<li><code>class_create()</code> -> to create device clas... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,002 | bash | # Unable to write on /dev/* files
I'm writing a basic char device driver for Linux kernel.
For this, the code flow I have considered is as follows:
1. `alloc_chrdev_region()` -> to use dynamic allocation of major number
2. `class_create()` -> to create device class in sysfs
3. `device_creat()` -> to create device und... | I assume that you are normally not root on your bash shell. Then this command line
```
sudo echo 54 > /dev/scull
```
does not what you think. The command is executed in two steps:
1. The bash setups the output redirection, i.e., it tries to open `/dev/scull` with the current user privileges.
2. The command `sudo ech... |
34528572 | Redirection to 'NUL' failed: FileStream will not open Win32 devices | 7 | 2015-12-30 11:25:03 | <p>I am trying to remove some verbosity from a <code>choco install</code> command within AppVeyor. Here is what I been trying (as suggested <a href="https://stackoverflow.com/a/4507627/136285">here</a>):</p>
<pre><code>if (Test-Path "C:/ProgramData/chocolatey/bin/swig.exe") {
echo "using swig from cache"
} else {
... | 3,397 | 136,285 | 2015-12-30 14:07:11 | 34,531,086 | 12 | 2015-12-30 14:05:26 | 1,630,171 | 2015-12-30 14:05:26 | https://stackoverflow.com/q/34528572 | https://stackoverflow.com/a/34531086 | <p><code>nul</code> is batch syntax. In PowerShell you can use <code>$null</code> instead, as Mathias R. Jessen pointed out in his comment:</p>
<pre><code>choco install swig > $null
</code></pre>
<p>Other options are piping into the <code>Out-Null</code> cmdlet, collecting the output in a variable, or casting it t... | <p><code>nul</code> is batch syntax. In PowerShell you can use <code>$null</code> instead, as Mathias R. Jessen pointed out in his comment:</p> <pre><code>choco install swig > $null </code></pre> <p>Other options are piping into the <code>Out-Null</code> cmdlet, collecting the output in a variable, or casting it t... | 526, 80758, 107817 | appveyor, chocolatey, powershell | <h1>Redirection to 'NUL' failed: FileStream will not open Win32 devices</h1>
<p>I am trying to remove some verbosity from a <code>choco install</code> command within AppVeyor. Here is what I been trying (as suggested <a href="https://stackoverflow.com/a/4507627/136285">here</a>):</p>
<pre><code>if (Test-Path "C:/Progr... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,003 | bash | # Redirection to 'NUL' failed: FileStream will not open Win32 devices
I am trying to remove some verbosity from a `choco install` command within AppVeyor. Here is what I been trying (as suggested [here](https://stackoverflow.com/a/4507627/136285)):
```
if (Test-Path "C:/ProgramData/chocolatey/bin/swig.exe") {
ech... | `nul` is batch syntax. In PowerShell you can use `$null` instead, as Mathias R. Jessen pointed out in his comment:
```
choco install swig > $null
```
Other options are piping into the `Out-Null` cmdlet, collecting the output in a variable, or casting it to `void`:
```
choco install swig | Out-Null
$dummy = choco ins... |
31913593 | REGEX for multiple lines - powershell | 7 | 2015-08-10 07:13:47 | <p>I have a little problem with regex in powershell. My REGEX works only for one line. I need to work on multiple lines. </p>
<p>For example html:</p>
<pre><code><li> test </li>
</ul>
</code></pre>
<p>I want REGEX took everything, including "/ul>". My suggestion is:</p>
<pre><code>'(^.*<li>.... | 12,944 | 4,229,913 | 2015-08-10 12:33:55 | 31,913,871 | 12 | 2015-08-10 07:29:00 | 1,163,423 | 2015-08-10 07:29:00 | https://stackoverflow.com/q/31913593 | https://stackoverflow.com/a/31913871 | <p>It <strong>depends</strong> on what regex method you are using. </p>
<p>If you use the .NET <code>Regex::Match</code>, there is a third parameter where you can define additional <code>regex</code>options. Use <code>[System.Text.RegularExpressions.RegexOptions]::Singleline</code> here:</p>
<pre><code>$html =
@'
&l... | <p>It <strong>depends</strong> on what regex method you are using. </p> <p>If you use the .NET <code>Regex::Match</code>, there is a third parameter where you can define additional <code>regex</code>options. Use <code>[System.Text.RegularExpressions.RegexOptions]::Singleline</code> here:</p> <pre><code>$html = @' &l... | 18, 526 | powershell, regex | <h1>REGEX for multiple lines - powershell</h1>
<p>I have a little problem with regex in powershell. My REGEX works only for one line. I need to work on multiple lines. </p>
<p>For example html:</p>
<pre><code><li> test </li>
</ul>
</code></pre>
<p>I want REGEX took everything, including "/ul>". My ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,004 | bash | # REGEX for multiple lines - powershell
I have a little problem with regex in powershell. My REGEX works only for one line. I need to work on multiple lines.
For example html:
```
<li> test </li>
</ul>
```
I want REGEX took everything, including "/ul>". My suggestion is:
```
'(^.*<li>.*</ul>)'
```
But it donesn't... | It **depends** on what regex method you are using.
If you use the .NET `Regex::Match`, there is a third parameter where you can define additional `regex`options. Use `[System.Text.RegularExpressions.RegexOptions]::Singleline` here:
```
$html =
@'
<li> test </li>
</ul>
'@
$regex = '(^.*<li>.*\</ul>)'
[regex]::Matc... |
31534079 | Use of $- in shell script | 7 | 2015-07-21 08:34:52 | <p>What is use of $- in Unix. In My system, the output is,</p>
<pre><code>$ echo $-
himBH
$
</code></pre>
<p>what is meant by himBH? what it stands for.</p>
<p>Thanks in Advance...</p>
| 5,921 | 5,063,789 | 2015-07-21 08:56:14 | 31,534,141 | 12 | 2015-07-21 08:38:13 | 1,022,525 | 2015-07-21 08:56:14 | https://stackoverflow.com/q/31534079 | https://stackoverflow.com/a/31534141 | <p>It returns the current shell's flags. The <code>$-</code> variable contains the shell's flags currently active in your terminal. These flags determine how your shell will function for you. In your case, these flags have the following meaning (note that all of these are defaults):</p>
<ul>
<li><p><strong>h</strong>:... | <p>It returns the current shell's flags. The <code>$-</code> variable contains the shell's flags currently active in your terminal. These flags determine how your shell will function for you. In your case, these flags have the following meaning (note that all of these are defaults):</p> <ul> <li><p><strong>h</strong>:... | 34, 58, 387, 390 | bash, linux, shell, unix | <h1>Use of $- in shell script</h1>
<p>What is use of $- in Unix. In My system, the output is,</p>
<pre><code>$ echo $-
himBH
$
</code></pre>
<p>what is meant by himBH? what it stands for.</p>
<p>Thanks in Advance...</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,005 | bash | # Use of $- in shell script
What is use of $- in Unix. In My system, the output is,
```
$ echo $-
himBH
$
```
what is meant by himBH? what it stands for.
Thanks in Advance... | It returns the current shell's flags. The `$-` variable contains the shell's flags currently active in your terminal. These flags determine how your shell will function for you. In your case, these flags have the following meaning (note that all of these are defaults):
- **h**: Short for “hashall” (read that “hash all... |
31478105 | PowerShell Script to Delete XML Element | 7 | 2015-07-17 14:23:56 | <p>I have an XML doccument that looks like this:</p>
<pre><code><Task>
<Settings>
</Settings>
<Sub>foo</Sub>
<Body>bar</Body>
</Task>
</code></pre>
<p>From PowerShell I can happily get the contents of 'Sub' and 'Body' using:</p>
<pre><code>$Body = $XMLF... | 21,652 | 3,012,508 | 2015-07-18 12:55:14 | 31,479,126 | 12 | 2015-07-17 15:16:32 | 712,649 | 2015-07-18 12:55:14 | https://stackoverflow.com/q/31478105 | https://stackoverflow.com/a/31479126 | <p>You can use <code>Where-Object</code> to find the Child nodes you want to remove and then call <code>RemoveChild()</code>:</p>
<pre><code>$Input = "C:\path\task.xml"
$Output = "C:\path\newtask.xml"
# Load the existing document
$Doc = [xml](Get-Content $Input)
# Specify tag names to delete and then find them
$Dele... | <p>You can use <code>Where-Object</code> to find the Child nodes you want to remove and then call <code>RemoveChild()</code>:</p> <pre><code>$Input = "C:\path\task.xml" $Output = "C:\path\newtask.xml" # Load the existing document $Doc = [xml](Get-Content $Input) # Specify tag names to delete and then find them $Dele... | 19, 526, 1227 | powershell, xml, xpath | <h1>PowerShell Script to Delete XML Element</h1>
<p>I have an XML doccument that looks like this:</p>
<pre><code><Task>
<Settings>
</Settings>
<Sub>foo</Sub>
<Body>bar</Body>
</Task>
</code></pre>
<p>From PowerShell I can happily get the contents of 'Sub... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,006 | bash | # PowerShell Script to Delete XML Element
I have an XML doccument that looks like this:
```
<Task>
<Settings>
</Settings>
<Sub>foo</Sub>
<Body>bar</Body>
</Task>
```
From PowerShell I can happily get the contents of 'Sub' and 'Body' using:
```
$Body = $XMLFile.Task.Body
```
But I am trying to REMOV... | You can use `Where-Object` to find the Child nodes you want to remove and then call `RemoveChild()`:
```
$Input = "C:\path\task.xml"
$Output = "C:\path\newtask.xml"
# Load the existing document
$Doc = [xml](Get-Content $Input)
# Specify tag names to delete and then find them
$DeleteNames = "Sub","Body"
($Doc.Task.Ch... |
31415158 | Powershell - JSON file to table | 7 | 2015-07-14 19:02:16 | <p>I am trying to get into Powershell and am trying to convert a simple JSON file to table format.</p>
<p>The json-file looks like this:</p>
<pre><code>{ "Members" : [
{ "Id" : 1,
"Details" : [ { "FirstName" : "Adam" }, { "LastName" : "Ant" } ] },
{ "Id" : 2,
"Details" : [ { "FirstName" : "Ben" }, { "LastName... | 19,890 | 3,873,139 | 2015-07-14 19:43:36 | 31,415,897 | 12 | 2015-07-14 19:43:36 | 3,829,407 | 2015-07-14 19:43:36 | https://stackoverflow.com/q/31415158 | https://stackoverflow.com/a/31415897 | <p>JSON is not my strength but if you look at the data structure ID is not on the same level as first and last name which is nested in details. I put the data in a here-string for testing. </p>
<pre><code>$json = @"
{ "Members" : [
{ "Id" : 1,
"Details" : [ { "FirstName" : "Adam" }, { "LastName" : "Ant" } ... | <p>JSON is not my strength but if you look at the data structure ID is not on the same level as first and last name which is nested in details. I put the data in a here-string for testing. </p> <pre><code>$json = @" { "Members" : [ { "Id" : 1, "Details" : [ { "FirstName" : "Adam" }, { "LastName" : "Ant" } ... | 526, 1508, 73157 | json, powershell, powershell-3.0 | <h1>Powershell - JSON file to table</h1>
<p>I am trying to get into Powershell and am trying to convert a simple JSON file to table format.</p>
<p>The json-file looks like this:</p>
<pre><code>{ "Members" : [
{ "Id" : 1,
"Details" : [ { "FirstName" : "Adam" }, { "LastName" : "Ant" } ] },
{ "Id" : 2,
"Details"... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,007 | bash | # Powershell - JSON file to table
I am trying to get into Powershell and am trying to convert a simple JSON file to table format.
The json-file looks like this:
```
{ "Members" : [
{ "Id" : 1,
"Details" : [ { "FirstName" : "Adam" }, { "LastName" : "Ant" } ] },
{ "Id" : 2,
"Details" : [ { "FirstName" : "Ben" ... | JSON is not my strength but if you look at the data structure ID is not on the same level as first and last name which is nested in details. I put the data in a here-string for testing.
```
$json = @"
{ "Members" : [
{ "Id" : 1,
"Details" : [ { "FirstName" : "Adam" }, { "LastName" : "Ant" } ] },
{ "Id"... |
27683581 | Why can't pgrep find this process? | 7 | 2014-12-29 04:53:32 | <p>If I execute the following, which is just a long command that will wait forever</p>
<pre><code>grep 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa abcd'
</code></pre>
<p>then <code>pgrep -f</code> can't find the process, if I search for <code>abcd</code> which is contained in the last segm... | 13,391 | 3,293,148 | 2014-12-29 14:03:31 | 27,684,015 | 12 | 2014-12-29 05:50:07 | 548,225 | 2014-12-29 05:50:07 | https://stackoverflow.com/q/27683581 | https://stackoverflow.com/a/27684015 | <p>Your edited command is found by either of these commands:</p>
<pre><code>pgrep -f abcd
</code></pre>
<p>or even:</p>
<pre><code>ps uxww | grep '[a]bcd'
</code></pre>
| <p>Your edited command is found by either of these commands:</p> <pre><code>pgrep -f abcd </code></pre> <p>or even:</p> <pre><code>ps uxww | grep '[a]bcd' </code></pre> | 58, 387, 1271, 12645 | bash, grep, linux, ps | <h1>Why can't pgrep find this process?</h1>
<p>If I execute the following, which is just a long command that will wait forever</p>
<pre><code>grep 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa abcd'
</code></pre>
<p>then <code>pgrep -f</code> can't find the process, if I search for <code>abc... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,008 | bash | # Why can't pgrep find this process?
If I execute the following, which is just a long command that will wait forever
```
grep 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa abcd'
```
then `pgrep -f` can't find the process, if I search for `abcd` which is contained in the last segment of the ... | Your edited command is found by either of these commands:
```
pgrep -f abcd
```
or even:
```
ps uxww | grep '[a]bcd'
``` |
26820590 | How can i use XmlReader in PowerShell to stream big/huge XML files? | 7 | 2014-11-08 18:31:08 | <p>I have an XML of couple of gigabytes. There are no spaces in the XML.</p>
<p>So I wrote a little C# code to split in single files (which has some additional code to perform some stuff e.g. randomizing while testing)</p>
<pre><code>using (XmlReader MyReader = XmlReader.Create(@"d:\xml\test.xml"))
{
... | 11,626 | 121,626 | 2020-01-13 14:30:23 | 26,820,939 | 12 | 2014-11-08 19:05:20 | 2,627,148 | 2014-11-13 15:56:51 | https://stackoverflow.com/q/26820590 | https://stackoverflow.com/a/26820939 | <p>This should be pretty close to what you wanted to do in Powershell:</p>
<pre><code>$f = [System.Xml.XmlReader]::create("d:\xml\test.xml")
while ($f.read())
{
switch ($f.NodeType)
{
([System.Xml.XmlNodeType]::Element) # Make sure to put this between brackets
{
if ($f.Name -eq "Cu... | <p>This should be pretty close to what you wanted to do in Powershell:</p> <pre><code>$f = [System.Xml.XmlReader]::create("d:\xml\test.xml") while ($f.read()) { switch ($f.NodeType) { ([System.Xml.XmlNodeType]::Element) # Make sure to put this between brackets { if ($f.Name -eq "Cu... | 19, 526 | powershell, xml | <h1>How can i use XmlReader in PowerShell to stream big/huge XML files?</h1>
<p>I have an XML of couple of gigabytes. There are no spaces in the XML.</p>
<p>So I wrote a little C# code to split in single files (which has some additional code to perform some stuff e.g. randomizing while testing)</p>
<pre><code>using (... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,009 | bash | # How can i use XmlReader in PowerShell to stream big/huge XML files?
I have an XML of couple of gigabytes. There are no spaces in the XML.
So I wrote a little C# code to split in single files (which has some additional code to perform some stuff e.g. randomizing while testing)
```
using (XmlReader MyReader = XmlRea... | This should be pretty close to what you wanted to do in Powershell:
```
$f = [System.Xml.XmlReader]::create("d:\xml\test.xml")
while ($f.read())
{
switch ($f.NodeType)
{
([System.Xml.XmlNodeType]::Element) # Make sure to put this between brackets
{
if ($f.Name -eq "Customer")
... |
26480004 | Making paste command read from standard input | 7 | 2014-10-21 06:11:56 | <pre><code>$paste num let
1 a
2 b
3 c
4 d
</code></pre>
<p>So when I do</p>
<pre><code>$ cat num | paste - -
1 2
3 4
</code></pre>
<p>My question is why doesn't "<code>cat num | paste - -</code>" generate the output as:</p>
<pre><code>1 1
2 2
3 3
4 4
</code></pre>
| 7,459 | 3,384,373 | 2021-12-20 10:05:38 | 26,480,035 | 12 | 2014-10-21 06:14:52 | 15,168 | 2014-10-21 06:33:23 | https://stackoverflow.com/q/26480004 | https://stackoverflow.com/a/26480035 | <p>Clearly, <code>paste</code> reads a line from the first 'file' (which is standard input), and then a line from the second 'file' (which is also standard input) and pastes them to create the first line of output. Then it repeats.</p>
<p>The POSIX specification for <a href="http://pubs.opengroup.org/onlinepubs/96999... | <p>Clearly, <code>paste</code> reads a line from the first 'file' (which is standard input), and then a line from the second 'file' (which is also standard input) and pastes them to create the first line of output. Then it repeats.</p> <p>The POSIX specification for <a href="http://pubs.opengroup.org/onlinepubs/96999... | 58, 390, 10425 | linux, paste, shell | <h1>Making paste command read from standard input</h1>
<pre><code>$paste num let
1 a
2 b
3 c
4 d
</code></pre>
<p>So when I do</p>
<pre><code>$ cat num | paste - -
1 2
3 4
</code></pre>
<p>My question is why doesn't "<code>cat num | paste - -</code>" generate the output as:</p>
<pre><code>1 1... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,010 | bash | # Making paste command read from standard input
```
$paste num let
1 a
2 b
3 c
4 d
```
So when I do
```
$ cat num | paste - -
1 2
3 4
```
My question is why doesn't "`cat num | paste - -`" generate the output as:
```
1 1
2 2
3 3
4 4
``` | Clearly, `paste` reads a line from the first 'file' (which is standard input), and then a line from the second 'file' (which is also standard input) and pastes them to create the first line of output. Then it repeats.
The POSIX specification for [`paste`](http://pubs.opengroup.org/onlinepubs/9699919799/utilities/paste... |
26451551 | How to convert multiline file into a string in bash with newline character? | 7 | 2014-10-19 14:32:31 | <p>How can I convert a file with multiple lines to a string with <code>\n</code> characters in bash? </p>
<p>For example - I have a certificate that I need to configure in my configuration <code>JSON</code> file
so instead of having </p>
<pre class="lang-none prettyprint-override"><code>-----BEGIN CERTIFICATE-----
... | 8,781 | 1,068,746 | 2020-08-24 15:35:49 | 26,451,573 | 12 | 2014-10-19 14:35:22 | 1,066,031 | 2014-10-19 14:38:59 | https://stackoverflow.com/q/26451551 | https://stackoverflow.com/a/26451573 | <p>One way using <code>awk</code>:</p>
<pre class="lang-none prettyprint-override"><code>$ awk '$1=$1' ORS='\\n' file
-----BEGIN CERTIFICATE-----\nMIIDBjCCMIIDB\nMIIDBjCCMIIDB\n....\nMIIDBjCCMIIDB==\n-----END CERTIFICATE-----\n
</code></pre>
| <p>One way using <code>awk</code>:</p> <pre class="lang-none prettyprint-override"><code>$ awk '$1=$1' ORS='\\n' file -----BEGIN CERTIFICATE-----\nMIIDBjCCMIIDB\nMIIDBjCCMIIDB\n....\nMIIDBjCCMIIDB==\n-----END CERTIFICATE-----\n </code></pre> | 58, 387 | bash, linux | <h1>How to convert multiline file into a string in bash with newline character?</h1>
<p>How can I convert a file with multiple lines to a string with <code>\n</code> characters in bash? </p>
<p>For example - I have a certificate that I need to configure in my configuration <code>JSON</code> file
so instead of having <... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,011 | bash | # How to convert multiline file into a string in bash with newline character?
How can I convert a file with multiple lines to a string with `\n` characters in bash?
For example - I have a certificate that I need to configure in my configuration `JSON` file
so instead of having
```
-----BEGIN CERTIFICATE-----
MIIDBjC... | One way using `awk`:
```
$ awk '$1=$1' ORS='\\n' file
-----BEGIN CERTIFICATE-----\nMIIDBjCCMIIDB\nMIIDBjCCMIIDB\n....\nMIIDBjCCMIIDB==\n-----END CERTIFICATE-----\n
``` |
25828883 | add a number in fish script | 7 | 2014-09-14 00:02:55 | <p>I want to have a function that gets the number of lines of output from a command and adds one to it. So far I have this:</p>
<pre><code>function add1
set num (tmux list-sessions | wc -l)
echo $num
end
</code></pre>
<p>Now how do I add <code>1</code> to <code>$num</code>? (or while I'm assigning the variabl... | 3,312 | 2,865,156 | 2014-09-14 00:06:36 | 25,828,897 | 12 | 2014-09-14 00:06:36 | 14,122 | 2014-09-14 00:06:36 | https://stackoverflow.com/q/25828883 | https://stackoverflow.com/a/25828897 | <p>See the <code>math</code> command in the <A HREF="http://fishshell.com/docs/2.0/commands.html" rel="noreferrer">user documentation</A>:</p>
<pre><code>set num (math $num + 1)
</code></pre>
| <p>See the <code>math</code> command in the <A HREF="http://fishshell.com/docs/2.0/commands.html" rel="noreferrer">user documentation</A>:</p> <pre><code>set num (math $num + 1) </code></pre> | 390, 55824 | fish, shell | <h1>add a number in fish script</h1>
<p>I want to have a function that gets the number of lines of output from a command and adds one to it. So far I have this:</p>
<pre><code>function add1
set num (tmux list-sessions | wc -l)
echo $num
end
</code></pre>
<p>Now how do I add <code>1</code> to <code>$num</code>... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,012 | bash | # add a number in fish script
I want to have a function that gets the number of lines of output from a command and adds one to it. So far I have this:
```
function add1
set num (tmux list-sessions | wc -l)
echo $num
end
```
Now how do I add `1` to `$num`? (or while I'm assigning the variable) | See the `math` command in the [user documentation](http://fishshell.com/docs/2.0/commands.html):
```
set num (math $num + 1)
``` |
25320047 | Synchronous child process calls for shell scripting (including CLI) in Node.js 0.10.x | 7 | 2014-08-15 01:32:21 | <p>Synchronous child process calls <a href="http://strongloop.com/strongblog/whats-new-in-node-js-v0-12-execsync-a-synchronous-api-for-child-processes/">are now available</a> in the versions of Node.js that are under development (i.e. unstable). This is great news for writing shell scripts, as it will allow code like t... | 7,084 | null | 2014-08-17 10:49:33 | 25,326,005 | 12 | 2014-08-15 11:58:04 | null | 2014-08-17 10:49:33 | https://stackoverflow.com/q/25320047 | https://stackoverflow.com/a/25326005 | <p>Let's look at three options: the two mentioned in the question, plus <a href="https://www.npmjs.org/package/execsync">execsync</a>.</p>
<h2><a href="https://www.npmjs.org/package/shelljs">shelljs</a></h2>
<p><code>shelljs</code> is much more than a library for calling child processes. Primarily, it is a cross-plat... | <p>Let's look at three options: the two mentioned in the question, plus <a href="https://www.npmjs.org/package/execsync">execsync</a>.</p> <h2><a href="https://www.npmjs.org/package/shelljs">shelljs</a></h2> <p><code>shelljs</code> is much more than a library for calling child processes. Primarily, it is a cross-plat... | 3, 390, 9696, 11225, 46426 | command-line-interface, javascript, node.js, popen, shell | <h1>Synchronous child process calls for shell scripting (including CLI) in Node.js 0.10.x</h1>
<p>Synchronous child process calls <a href="http://strongloop.com/strongblog/whats-new-in-node-js-v0-12-execsync-a-synchronous-api-for-child-processes/">are now available</a> in the versions of Node.js that are under developm... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,013 | bash | # Synchronous child process calls for shell scripting (including CLI) in Node.js 0.10.x
Synchronous child process calls [are now available](http://strongloop.com/strongblog/whats-new-in-node-js-v0-12-execsync-a-synchronous-api-for-child-processes/) in the versions of Node.js that are under development (i.e. unstable).... | Let's look at three options: the two mentioned in the question, plus [execsync](https://www.npmjs.org/package/execsync).
## [shelljs](https://www.npmjs.org/package/shelljs)
`shelljs` is much more than a library for calling child processes. Primarily, it is a cross-platform JavaScript implementation of several POSIX u... |
25150238 | locate behavior with bash wildcards | 7 | 2014-08-06 00:01:49 | <p>I have</p>
<pre><code>$ ls -l re*trict
ls: cannot access re*trict: No such file or directory
</code></pre>
<p>Why does this give 0 matches?</p>
<pre><code>$ locate -c 're*trict'
0
$ locate -c re*trict
0
$ locate -c re?trict
0
</code></pre>
<p>This works though and gives 8351 matches:</p>
<pre><code>$ locate -c ... | 4,018 | 494,074 | 2014-08-06 00:25:40 | 25,150,322 | 12 | 2014-08-06 00:09:15 | 1,899,640 | 2014-08-06 00:09:15 | https://stackoverflow.com/q/25150238 | https://stackoverflow.com/a/25150322 | <p><code>locate</code> matches against the full path name. To find <code>re*trict</code> as a substring, you have to add <code>*</code> before and after it:</p>
<pre><code>locate '*re*trict*'
</code></pre>
| <p><code>locate</code> matches against the full path name. To find <code>re*trict</code> as a substring, you have to add <code>*</code> before and after it:</p> <pre><code>locate '*re*trict*' </code></pre> | 58, 387, 390 | bash, linux, shell | <h1>locate behavior with bash wildcards</h1>
<p>I have</p>
<pre><code>$ ls -l re*trict
ls: cannot access re*trict: No such file or directory
</code></pre>
<p>Why does this give 0 matches?</p>
<pre><code>$ locate -c 're*trict'
0
$ locate -c re*trict
0
$ locate -c re?trict
0
</code></pre>
<p>This works though and giv... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,014 | bash | # locate behavior with bash wildcards
I have
```
$ ls -l re*trict
ls: cannot access re*trict: No such file or directory
```
Why does this give 0 matches?
```
$ locate -c 're*trict'
0
$ locate -c re*trict
0
$ locate -c re?trict
0
```
This works though and gives 8351 matches:
```
$ locate -c restrict
8351
``` | `locate` matches against the full path name. To find `re*trict` as a substring, you have to add `*` before and after it:
```
locate '*re*trict*'
``` |
24482137 | What does "- < /dev/null" mean in "gcc -dM -E - < /dev/null"? | 7 | 2014-06-30 02:13:25 | <p>I know that using</p>
<pre class="lang-bash prettyprint-override"><code>gcc -dM -E - < /dev/null
</code></pre>
<p>can get the predifined macros of <code>gcc</code>, but what does the </p>
<pre class="lang-bash prettyprint-override"><code>- < /dev/null
</code></pre>
<p>mean in this command? Per my understan... | 1,275 | 2,106,207 | 2014-06-30 09:04:45 | 24,482,299 | 12 | 2014-06-30 02:41:33 | 3,614,835 | 2014-06-30 02:41:33 | https://stackoverflow.com/q/24482137 | https://stackoverflow.com/a/24482299 | <p>On its own, <code>-</code> means "read from standard input instead of the filename that would otherwise be provided on this command-line". This is a common Unix convention.</p>
<p>The <code>< /dev/null</code> redirects standard input from <code>/dev/null</code>, which is of length 0. Thus GCC will read from st... | <p>On its own, <code>-</code> means "read from standard input instead of the filename that would otherwise be provided on this command-line". This is a common Unix convention.</p> <p>The <code>< /dev/null</code> redirects standard input from <code>/dev/null</code>, which is of length 0. Thus GCC will read from st... | 8, 10, 387, 1477 | bash, c, c++, gcc | <h1>What does "- < /dev/null" mean in "gcc -dM -E - < /dev/null"?</h1>
<p>I know that using</p>
<pre class="lang-bash prettyprint-override"><code>gcc -dM -E - < /dev/null
</code></pre>
<p>can get the predifined macros of <code>gcc</code>, but what does the </p>
<pre class="lang-bash prettyprint-override"><code>- ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,015 | bash | # What does "- < /dev/null" mean in "gcc -dM -E - < /dev/null"?
I know that using
```
gcc -dM -E - < /dev/null
```
can get the predifined macros of `gcc`, but what does the
```
- < /dev/null
```
mean in this command? Per my understanding, there should be a option behind `-`. I have tried to search on [gcc manual](... | On its own, `-` means "read from standard input instead of the filename that would otherwise be provided on this command-line". This is a common Unix convention.
The `< /dev/null` redirects standard input from `/dev/null`, which is of length 0. Thus GCC will read from standard input and immediately reach the end of th... |
22626932 | expr: non-integer argument. How to subtract dot-decimal numbers | 7 | 2014-03-25 06:28:09 | <p>I am trying to subtract two numbers by running the following bash script:</p>
<pre><code>#!/bin/bash -x
cur_length=`cat length.txt`
cur_pos=`cat pos.txt`
diff=`$(expr $cur_length - $cur_pos)`
echo "$diff"
</code></pre>
<p>But the output says expr has some issue:</p>
<pre><code>+++ expr 235.68 - 145.9
expr: non-i... | 16,145 | 3,343,273 | 2021-08-27 14:14:16 | 22,627,105 | 12 | 2014-03-25 06:38:19 | 3,030,305 | 2014-03-25 06:48:24 | https://stackoverflow.com/q/22626932 | https://stackoverflow.com/a/22627105 | <p>Bash doesn't do fractions, just integers. Use <code>bc</code> instead:</p>
<pre><code>$ echo '235.68 - 145.9' | bc
89.78
</code></pre>
<p>That result can, of course, be put in a shell variable the same way that you were doing with <code>expr</code>:</p>
<pre><code>$ diff="$(echo '235.68 - 145.9' | bc)"
$ echo ... | <p>Bash doesn't do fractions, just integers. Use <code>bc</code> instead:</p> <pre><code>$ echo '235.68 - 145.9' | bc 89.78 </code></pre> <p>That result can, of course, be put in a shell variable the same way that you were doing with <code>expr</code>:</p> <pre><code>$ diff="$(echo '235.68 - 145.9' | bc)" $ echo ... | 387 | bash | <h1>expr: non-integer argument. How to subtract dot-decimal numbers</h1>
<p>I am trying to subtract two numbers by running the following bash script:</p>
<pre><code>#!/bin/bash -x
cur_length=`cat length.txt`
cur_pos=`cat pos.txt`
diff=`$(expr $cur_length - $cur_pos)`
echo "$diff"
</code></pre>
<p>But the output says... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,016 | bash | # expr: non-integer argument. How to subtract dot-decimal numbers
I am trying to subtract two numbers by running the following bash script:
```
#!/bin/bash -x
cur_length=`cat length.txt`
cur_pos=`cat pos.txt`
diff=`$(expr $cur_length - $cur_pos)`
echo "$diff"
```
But the output says expr has some issue:
```
+++ ex... | Bash doesn't do fractions, just integers. Use `bc` instead:
```
$ echo '235.68 - 145.9' | bc
89.78
```
That result can, of course, be put in a shell variable the same way that you were doing with `expr`:
```
$ diff="$(echo '235.68 - 145.9' | bc)"
$ echo $diff
89.78
``` |
22039200 | unix shell script for checking three variables are same | 7 | 2014-02-26 10:56:28 | <p>i want to check if all three variables are same then print msg</p>
<pre><code>if [ "$x1" == "$x2" == "$3" ];
then
echo "all are same"
fi
</code></pre>
<p>I am getting this error:</p>
<blockquote>
<p>[: too many arguments</p>
</blockquote>
| 6,773 | 3,250,373 | 2014-02-26 14:23:18 | 22,039,240 | 12 | 2014-02-26 10:58:16 | 1,983,854 | 2014-02-26 10:58:16 | https://stackoverflow.com/q/22039200 | https://stackoverflow.com/a/22039240 | <p>You cannot compare three variables at the time. Instead, do compare them in blocks of two:</p>
<pre><code>if [ "$x1" = "$x2" ] && [ "$x2" = "$x3" ];
then
echo "all are same"
fi
</code></pre>
| <p>You cannot compare three variables at the time. Instead, do compare them in blocks of two:</p> <pre><code>if [ "$x1" = "$x2" ] && [ "$x2" = "$x3" ]; then echo "all are same" fi </code></pre> | 34, 387, 390 | bash, shell, unix | <h1>unix shell script for checking three variables are same</h1>
<p>i want to check if all three variables are same then print msg</p>
<pre><code>if [ "$x1" == "$x2" == "$3" ];
then
echo "all are same"
fi
</code></pre>
<p>I am getting this error:</p>
<blockquote>
<p>[: too many arguments</p>
</blockquote>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,017 | bash | # unix shell script for checking three variables are same
i want to check if all three variables are same then print msg
```
if [ "$x1" == "$x2" == "$3" ];
then
echo "all are same"
fi
```
I am getting this error:
> [: too many arguments | You cannot compare three variables at the time. Instead, do compare them in blocks of two:
```
if [ "$x1" = "$x2" ] && [ "$x2" = "$x3" ];
then
echo "all are same"
fi
``` |
22003995 | Replacing first column csv with variable | 7 | 2014-02-25 03:29:38 | <p>I can't believe I couldn't find my question anywhere else in the bash/linux community. I simply want to replace the first column of my csv file with a variable...</p>
<pre><code>0,8,9,10
0,8,9,10
0,8,9,10
0,8,9,10
0,8,9,10
0,8,9,10
2/24/14,8,9,10
2/24/14,8,9,10
2/24/14,8,9,10
2/24/14,8,9,10
2/24/14,8,9,10
2/24/14... | 6,158 | 2,143,205 | 2016-08-12 03:39:06 | 22,004,005 | 12 | 2014-02-25 03:31:04 | 970,195 | 2014-02-25 03:36:08 | https://stackoverflow.com/q/22003995 | https://stackoverflow.com/a/22004005 | <p>This should work: </p>
<pre><code>awk -v dt="$date" 'BEGIN{FS=OFS=","}{$1=dt}1' inputFile
</code></pre>
<p><strong>Explaination:</strong></p>
<ul>
<li>Use <code>-v</code> option to set an <code>awk</code> variable and assign it your <code>shell</code> variable. </li>
<li>Set the Input Field Separator and Output F... | <p>This should work: </p> <pre><code>awk -v dt="$date" 'BEGIN{FS=OFS=","}{$1=dt}1' inputFile </code></pre> <p><strong>Explaination:</strong></p> <ul> <li>Use <code>-v</code> option to set an <code>awk</code> variable and assign it your <code>shell</code> variable. </li> <li>Set the Input Field Separator and Output F... | 73, 387, 990, 5282 | awk, bash, csv, sed | <h1>Replacing first column csv with variable</h1>
<p>I can't believe I couldn't find my question anywhere else in the bash/linux community. I simply want to replace the first column of my csv file with a variable...</p>
<pre><code>0,8,9,10
0,8,9,10
0,8,9,10
0,8,9,10
0,8,9,10
0,8,9,10
2/24/14,8,9,10
2/24/14,8,9,10
2/... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,018 | bash | # Replacing first column csv with variable
I can't believe I couldn't find my question anywhere else in the bash/linux community. I simply want to replace the first column of my csv file with a variable...
```
0,8,9,10
0,8,9,10
0,8,9,10
0,8,9,10
0,8,9,10
0,8,9,10
2/24/14,8,9,10
2/24/14,8,9,10
2/24/14,8,9,10
2/24/14... | This should work:
```
awk -v dt="$date" 'BEGIN{FS=OFS=","}{$1=dt}1' inputFile
```
**Explaination:**
- Use `-v` option to set an `awk` variable and assign it your `shell` variable.
- Set the Input Field Separator and Output Field Separator to `,` (since it is a csv)
- Set the value of `$1` to your `awk` variable.
- `... |
21821968 | Shell Script to get exception from logs for last one hour | 7 | 2014-02-17 06:10:09 | <p>I am developing script which will grep logs of last one hour and check any exception and send email for solaris platform.</p>
<p>I did following steps</p>
<pre><code>grep -n -h date +'%Y-%m-%d %H:%M' test.logs
</code></pre>
<p>above command gives me line number and then i do following</p>
<pre><code>tail +618331... | 21,023 | 627,855 | 2014-03-01 22:08:22 | 21,822,546 | 12 | 2014-02-17 06:51:02 | 3,030,305 | 2014-02-18 21:54:14 | https://stackoverflow.com/q/21821968 | https://stackoverflow.com/a/21822546 | <p>With GNU <code>date</code>, one can use:</p>
<pre><code> grep "^$(date -d -1hour +'%Y-%m-%d %H')" test.logs | grep 'exception'| mail -s "exceptions in last hour of test.logs" ImranRazaKhan
</code></pre>
<p>The first step above is to select all log entries from the last hour. This is done with <code>grep</code> by... | <p>With GNU <code>date</code>, one can use:</p> <pre><code> grep "^$(date -d -1hour +'%Y-%m-%d %H')" test.logs | grep 'exception'| mail -s "exceptions in last hour of test.logs" ImranRazaKhan </code></pre> <p>The first step above is to select all log entries from the last hour. This is done with <code>grep</code> by... | 390, 1271, 1357, 2635, 7896 | grep, parsing, shell, solaris, tail | <h1>Shell Script to get exception from logs for last one hour</h1>
<p>I am developing script which will grep logs of last one hour and check any exception and send email for solaris platform.</p>
<p>I did following steps</p>
<pre><code>grep -n -h date +'%Y-%m-%d %H:%M' test.logs
</code></pre>
<p>above command gives ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,019 | bash | # Shell Script to get exception from logs for last one hour
I am developing script which will grep logs of last one hour and check any exception and send email for solaris platform.
I did following steps
```
grep -n -h date +'%Y-%m-%d %H:%M' test.logs
```
above command gives me line number and then i do following
... | With GNU `date`, one can use:
```
grep "^$(date -d -1hour +'%Y-%m-%d %H')" test.logs | grep 'exception'| mail -s "exceptions in last hour of test.logs" ImranRazaKhan
```
The first step above is to select all log entries from the last hour. This is done with `grep` by looking for all lines beginning with the year-mon... |
20657483 | Unix equivalent of '@ECHO ON' | 7 | 2013-12-18 11:53:33 | <p>Need to confirm if there is a UNIX equivalent command for '<code>@ECHO ON</code>' in DOS. </p>
<p>I am required to echo each command and then its O/P. I can do it by adding an echo statement for each command that I execute from my script. But I don't want to do it with a echo statement for each command in my script... | 4,170 | 2,046,462 | 2013-12-18 12:30:07 | 20,658,269 | 12 | 2013-12-18 12:30:07 | 2,332,217 | 2013-12-18 12:30:07 | https://stackoverflow.com/q/20657483 | https://stackoverflow.com/a/20658269 | <p>To turn on tracing</p>
<pre><code>set -x
</code></pre>
<p>To turn off tracing</p>
<pre><code>set +x
</code></pre>
| <p>To turn on tracing</p> <pre><code>set -x </code></pre> <p>To turn off tracing</p> <pre><code>set +x </code></pre> | 34, 390 | shell, unix | <h1>Unix equivalent of '@ECHO ON'</h1>
<p>Need to confirm if there is a UNIX equivalent command for '<code>@ECHO ON</code>' in DOS. </p>
<p>I am required to echo each command and then its O/P. I can do it by adding an echo statement for each command that I execute from my script. But I don't want to do it with a echo ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,020 | bash | # Unix equivalent of '@ECHO ON'
Need to confirm if there is a UNIX equivalent command for '`@ECHO ON`' in DOS.
I am required to echo each command and then its O/P. I can do it by adding an echo statement for each command that I execute from my script. But I don't want to do it with a echo statement for each command i... | To turn on tracing
```
set -x
```
To turn off tracing
```
set +x
``` |
20437067 | Testing against -n option in BASH scripts always returns true | 7 | 2013-12-07 03:03:50 | <p>I am writing a bash script, in which I am trying to check if there are particular parameters provided. I've noticed a strange (at least for me) behavior of <code>[ -n arg ]</code> test. For the following script:</p>
<pre><code>#!/bin/bash
if [ -n $1 ]; then
echo "The 1st argument is of NON ZERO length"
fi
if ... | 1,241 | 2,760,967 | 2016-07-06 10:12:08 | 20,437,193 | 12 | 2013-12-07 03:26:15 | 900,873 | 2013-12-07 03:26:15 | https://stackoverflow.com/q/20437067 | https://stackoverflow.com/a/20437193 | <p>Quote it.</p>
<pre><code>if [ -n "$1" ]; then
</code></pre>
<p>Without the quotes, if <code>$1</code> is empty, you execute <code>[ -n ]</code>, which is true*, and if <code>$1</code> is not empty, then it's obviously true.</p>
<p>* If you give <code>[</code> a single argument (excluding <code>]</code>), it is a... | <p>Quote it.</p> <pre><code>if [ -n "$1" ]; then </code></pre> <p>Without the quotes, if <code>$1</code> is empty, you execute <code>[ -n ]</code>, which is true*, and if <code>$1</code> is not empty, then it's obviously true.</p> <p>* If you give <code>[</code> a single argument (excluding <code>]</code>), it is a... | 387, 390, 10327 | bash, sh, shell | <h1>Testing against -n option in BASH scripts always returns true</h1>
<p>I am writing a bash script, in which I am trying to check if there are particular parameters provided. I've noticed a strange (at least for me) behavior of <code>[ -n arg ]</code> test. For the following script:</p>
<pre><code>#!/bin/bash
if [ ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,021 | bash | # Testing against -n option in BASH scripts always returns true
I am writing a bash script, in which I am trying to check if there are particular parameters provided. I've noticed a strange (at least for me) behavior of `[ -n arg ]` test. For the following script:
```
#!/bin/bash
if [ -n $1 ]; then
echo "The 1st... | Quote it.
```
if [ -n "$1" ]; then
```
Without the quotes, if `$1` is empty, you execute `[ -n ]`, which is true*, and if `$1` is not empty, then it's obviously true.
* If you give `[` a single argument (excluding `]`), it is always true. (Incidentally, this is a pitfall that many new users fall into when they expec... |
19683973 | Is there a way to force Powershell to open a document as read-only and close without saving? | 7 | 2013-10-30 13:43:49 | <p>I have a script that parses data from Word documents. I arrived to the office this morning to realize that the script hadn't completed, hanging on a "File In Use" dialog box. I found a reference to the <code>$true</code> parameter -- open Read-Only -- on <a href="http://msdn.microsoft.com/en-us/library/microsoft.off... | 20,070 | 1,267,125 | 2018-11-21 10:01:43 | 19,690,625 | 12 | 2013-10-30 18:07:48 | 2,934,206 | 2013-10-30 18:07:48 | https://stackoverflow.com/q/19683973 | https://stackoverflow.com/a/19690625 | <p>For read only, try this:</p>
<pre><code>$word.Documents.Open("$doc.Fullname", $false, $true)
</code></pre>
<p>For closing, try this:</p>
<pre><code>$word.Documents.Close($false)
</code></pre>
<p>The MSDN links seem pretty clear about the order these parameters need to appear in and the above worked for me.</p>
| <p>For read only, try this:</p> <pre><code>$word.Documents.Open("$doc.Fullname", $false, $true) </code></pre> <p>For closing, try this:</p> <pre><code>$word.Documents.Close($false) </code></pre> <p>The MSDN links seem pretty clear about the order these parameters need to appear in and the above worked for me.</p> | 526, 724 | file-io, powershell | <h1>Is there a way to force Powershell to open a document as read-only and close without saving?</h1>
<p>I have a script that parses data from Word documents. I arrived to the office this morning to realize that the script hadn't completed, hanging on a "File In Use" dialog box. I found a reference to the <code>$true</... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,022 | bash | # Is there a way to force Powershell to open a document as read-only and close without saving?
I have a script that parses data from Word documents. I arrived to the office this morning to realize that the script hadn't completed, hanging on a "File In Use" dialog box. I found a reference to the `$true` parameter -- o... | For read only, try this:
```
$word.Documents.Open("$doc.Fullname", $false, $true)
```
For closing, try this:
```
$word.Documents.Close($false)
```
The MSDN links seem pretty clear about the order these parameters need to appear in and the above worked for me. |
16110431 | Replace() question mark in image dimensions string from Shell | 7 | 2013-04-19 17:36:46 | <p>I'm trying to get the height of a bitmap by using the Shell object in VBA.</p>
<p>Here is the relevant portion of code (<code>bmp</code> is a member of a custom class, and <code>.Width</code> is a property defined as an Integer.)</p>
<pre><code>Set objImg = objShell.Namespace(subfs(sf)).ParseName(bmp.Name)
tmpDim ... | 5,107 | 657,668 | 2020-02-17 15:13:44 | 18,216,858 | 12 | 2013-08-13 18:48:33 | 2,250,183 | 2013-08-13 18:48:33 | https://stackoverflow.com/q/16110431 | https://stackoverflow.com/a/18216858 | <p>The question mark you are seeing is not actually a question mark. The Asc() function will return a value of 63, but AscW() will probably return 8206, the unicode left-to-right mark.</p>
<p>I believe VBA stores strings using two-byte wide characters. The Asc function will only return a value of 0-255 and appears to ... | <p>The question mark you are seeing is not actually a question mark. The Asc() function will return a value of 63, but AscW() will probably return 8206, the unicode left-to-right mark.</p> <p>I believe VBA stores strings using two-byte wide characters. The Asc function will only return a value of 0-255 and appears to ... | 390, 522, 1449, 34595 | excel, shell, vba, windows-7 | <h1>Replace() question mark in image dimensions string from Shell</h1>
<p>I'm trying to get the height of a bitmap by using the Shell object in VBA.</p>
<p>Here is the relevant portion of code (<code>bmp</code> is a member of a custom class, and <code>.Width</code> is a property defined as an Integer.)</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 | 11,023 | bash | # Replace() question mark in image dimensions string from Shell
I'm trying to get the height of a bitmap by using the Shell object in VBA.
Here is the relevant portion of code (`bmp` is a member of a custom class, and `.Width` is a property defined as an Integer.)
```
Set objImg = objShell.Namespace(subfs(sf)).Parse... | The question mark you are seeing is not actually a question mark. The Asc() function will return a value of 63, but AscW() will probably return 8206, the unicode left-to-right mark.
I believe VBA stores strings using two-byte wide characters. The Asc function will only return a value of 0-255 and appears to return 63 ... |
18182690 | How to start remotely process in PowerShell | 7 | 2013-08-12 08:39:14 | <p>I have a problem, I have a <em>script</em> which:</p>
<ul>
<li>Connect with PSSession (I use <code>PSSession</code> with admin account)</li>
<li>Stop 2 process</li>
<li>Do change on them files</li>
<li>Start the 2 process (Problem here)</li>
</ul>
<p>I want to start process on server, so i'm connect with PSSession... | 31,614 | 2,558,648 | 2014-01-27 12:14:03 | 18,183,375 | 12 | 2013-08-12 09:15:35 | 520,612 | 2013-08-12 09:15:35 | https://stackoverflow.com/q/18182690 | https://stackoverflow.com/a/18183375 | <p>You can try using WMI:</p>
<pre><code>$command = "notepad.exe"
$process = [WMICLASS]"\\$CompName\ROOT\CIMV2:win32_process"
$result = $process.Create($command)
</code></pre>
<p>If you need passing credentials:</p>
<pre><code>$cred = get-credential
$process = get-wmiobject -query "SELECT * FROM Meta_Class WHERE __... | <p>You can try using WMI:</p> <pre><code>$command = "notepad.exe" $process = [WMICLASS]"\\$CompName\ROOT\CIMV2:win32_process" $result = $process.Create($command) </code></pre> <p>If you need passing credentials:</p> <pre><code>$cred = get-credential $process = get-wmiobject -query "SELECT * FROM Meta_Class WHERE __... | 526, 837, 26462, 43391 | invoke-command, powershell, remoting, start-process | <h1>How to start remotely process in PowerShell</h1>
<p>I have a problem, I have a <em>script</em> which:</p>
<ul>
<li>Connect with PSSession (I use <code>PSSession</code> with admin account)</li>
<li>Stop 2 process</li>
<li>Do change on them files</li>
<li>Start the 2 process (Problem here)</li>
</ul>
<p>I want to s... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,024 | bash | # How to start remotely process in PowerShell
I have a problem, I have a *script* which:
- Connect with PSSession (I use `PSSession` with admin account)
- Stop 2 process
- Do change on them files
- Start the 2 process (Problem here)
I want to start process on server, so i'm connect with PSSession (No problem)
I do ... | You can try using WMI:
```
$command = "notepad.exe"
$process = [WMICLASS]"\\$CompName\ROOT\CIMV2:win32_process"
$result = $process.Create($command)
```
If you need passing credentials:
```
$cred = get-credential
$process = get-wmiobject -query "SELECT * FROM Meta_Class WHERE __Class = 'Win32_Process'" -namespace "ro... |
18115885 | getopts not working in bash script | 7 | 2013-08-08 00:11:28 | <pre><code>#! bin/bash
# code for train.sh
while getopts "f:" flag
do
case $flag in
f)
echo "Hi"
STARTPOINT = $OPTARG
;;
esac
done
echo Test range: $4
echo Train range: $3
#path of experiment folder and data folder:
... | 21,632 | 1,576,804 | 2013-08-08 05:14:36 | 18,116,001 | 12 | 2013-08-08 00:26:16 | 1,213,907 | 2013-08-08 00:32:01 | https://stackoverflow.com/q/18115885 | https://stackoverflow.com/a/18116001 | <p>You need to put any options before naked parameters</p>
<pre><code>./train.sh -f testf test1 test2 test3 test4
</code></pre>
<p>with output</p>
<pre><code>Hi
Test range: test4
Train range: test3
Experiment: test1
DataSet: test2
file: testf
</code></pre>
<p>You need a couple of changes too</p>
<pre><code>while ... | <p>You need to put any options before naked parameters</p> <pre><code>./train.sh -f testf test1 test2 test3 test4 </code></pre> <p>with output</p> <pre><code>Hi Test range: test4 Train range: test3 Experiment: test1 DataSet: test2 file: testf </code></pre> <p>You need a couple of changes too</p> <pre><code>while ... | 34, 387 | bash, unix | <h1>getopts not working in bash script</h1>
<pre><code>#! bin/bash
# code for train.sh
while getopts "f:" flag
do
case $flag in
f)
echo "Hi"
STARTPOINT = $OPTARG
;;
esac
done
echo Test range: $4
echo Train range: $3
#... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,025 | bash | # getopts not working in bash script
```
#! bin/bash
# code for train.sh
while getopts "f:" flag
do
case $flag in
f)
echo "Hi"
STARTPOINT = $OPTARG
;;
esac
done
echo Test range: $4
echo Train range: $3
#path of exper... | You need to put any options before naked parameters
```
./train.sh -f testf test1 test2 test3 test4
```
with output
```
Hi
Test range: test4
Train range: test3
Experiment: test1
DataSet: test2
file: testf
```
You need a couple of changes too
```
while getopts "f:" flag
do
case $flag in
f)
... |
17075070 | Paste side by side multiple files by numerical order | 7 | 2013-06-12 20:47:54 | <p>I have many files in a directory with similar file names like file1, file2, file3, file4, file5, ..... , file1000. They are of the same dimension, and each one of them has 5 columns and 2000 lines. I want to paste them all together side by side in a numerical order into one large file, so the final large file should... | 12,778 | 1,687,130 | 2013-06-13 07:04:16 | 17,075,524 | 12 | 2013-06-12 21:17:04 | 7,552 | 2013-06-12 21:17:04 | https://stackoverflow.com/q/17075070 | https://stackoverflow.com/a/17075524 | <p>If your current shell is bash: <code>paste -d " " file{1..1000}</code></p>
| <p>If your current shell is bash: <code>paste -d " " file{1..1000}</code></p> | 390, 10425 | paste, shell | <h1>Paste side by side multiple files by numerical order</h1>
<p>I have many files in a directory with similar file names like file1, file2, file3, file4, file5, ..... , file1000. They are of the same dimension, and each one of them has 5 columns and 2000 lines. I want to paste them all together side by side in a numer... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,026 | bash | # Paste side by side multiple files by numerical order
I have many files in a directory with similar file names like file1, file2, file3, file4, file5, ..... , file1000. They are of the same dimension, and each one of them has 5 columns and 2000 lines. I want to paste them all together side by side in a numerical orde... | If your current shell is bash: `paste -d " " file{1..1000}` |
16919317 | Catch failure in shell script | 7 | 2013-06-04 13:34:03 | <p>Pretty new to shell scripting. I am trying to do the following:</p>
<pre><code>#!/bin/bash
unzip myfile.zip
#do stuff if unzip successful
</code></pre>
<p>I know that I can just chain the commands together in with <code>&&</code> but there is quite a chunk, it would not be terribly maintainable.</p>
| 12,096 | 445,126 | 2019-04-02 14:52:46 | 16,919,522 | 12 | 2013-06-04 13:44:20 | null | 2013-06-04 13:44:20 | https://stackoverflow.com/q/16919317 | https://stackoverflow.com/a/16919522 | <p>You can use the exit status of the command explicitly in the test:</p>
<pre><code>if ! unzip myfile.zip &> /dev/null; then
# handle error
fi
</code></pre>
| <p>You can use the exit status of the command explicitly in the test:</p> <pre><code>if ! unzip myfile.zip &> /dev/null; then # handle error fi </code></pre> | 34, 387, 390 | bash, shell, unix | <h1>Catch failure in shell script</h1>
<p>Pretty new to shell scripting. I am trying to do the following:</p>
<pre><code>#!/bin/bash
unzip myfile.zip
#do stuff if unzip successful
</code></pre>
<p>I know that I can just chain the commands together in with <code>&&</code> but there is quite a chunk, it would... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,027 | bash | # Catch failure in shell script
Pretty new to shell scripting. I am trying to do the following:
```
#!/bin/bash
unzip myfile.zip
#do stuff if unzip successful
```
I know that I can just chain the commands together in with `&&` but there is quite a chunk, it would not be terribly maintainable. | You can use the exit status of the command explicitly in the test:
```
if ! unzip myfile.zip &> /dev/null; then
# handle error
fi
``` |
16900675 | Why does find . -not -name ".*" not exclude hidden files? | 7 | 2013-06-03 15:43:59 | <p>I want to ignore all hidden files, but especially .git and .svn ones when searching (and later replacing) files, not I have found that the most basic way to exclude such hidden files described in many online tutorials doesn't work here.</p>
<pre><code>find . -not -name ".*"
</code></pre>
<p>will also print hidden ... | 8,460 | 1,273,684 | 2013-06-03 17:04:22 | 16,900,768 | 12 | 2013-06-03 15:48:45 | 318,758 | 2013-06-03 15:48:45 | https://stackoverflow.com/q/16900675 | https://stackoverflow.com/a/16900768 | <p>The thing is <code>-not -name ".*"</code> does match all files and directories that start with anything but "." - but it doesn't prune them from the search, so you'll get matches from inside hidden directories. To prune paths use <code>-prune</code>, i.e.:</p>
<pre><code>find $PWD -name ".*" -prune -o -print
</code... | <p>The thing is <code>-not -name ".*"</code> does match all files and directories that start with anything but "." - but it doesn't prune them from the search, so you'll get matches from inside hidden directories. To prune paths use <code>-prune</code>, i.e.:</p> <pre><code>find $PWD -name ".*" -prune -o -print </code... | 387, 2498, 10193 | bash, find, replace | <h1>Why does find . -not -name ".*" not exclude hidden files?</h1>
<p>I want to ignore all hidden files, but especially .git and .svn ones when searching (and later replacing) files, not I have found that the most basic way to exclude such hidden files described in many online tutorials doesn't work here.</p>
<pre><co... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,028 | bash | # Why does find . -not -name ".*" not exclude hidden files?
I want to ignore all hidden files, but especially .git and .svn ones when searching (and later replacing) files, not I have found that the most basic way to exclude such hidden files described in many online tutorials doesn't work here.
```
find . -not -name... | The thing is `-not -name ".*"` does match all files and directories that start with anything but "." - but it doesn't prune them from the search, so you'll get matches from inside hidden directories. To prune paths use `-prune`, i.e.:
```
find $PWD -name ".*" -prune -o -print
```
(I use `$PWD` because otherwise the s... |
16803003 | In place replace using powershell | 7 | 2013-05-28 23:12:06 | <p>I am trying to write an equivalent of </p>
<pre><code>find -name "*.xml" | xargs grep -l "Search String"
| xargs perl -p -i -e 's/Search String/Replace String/g'
</code></pre>
<p>in powershell. This is what I came up with.</p>
<pre><code>Get-ChildItem 'D:\code\cpp\FileHandlingCpp\input - Copy' -Recurse |
... | 5,522 | 124,797 | 2013-08-13 20:58:00 | 16,804,326 | 12 | 2013-05-29 01:59:46 | 251,123 | 2013-05-29 01:59:46 | https://stackoverflow.com/q/16803003 | https://stackoverflow.com/a/16804326 | <p>Maybe it would help to get back to your original goal of implementing the equivalent of the Unix version. Here is essentially the equivalent PowerShell version.</p>
<pre><code>$search = '<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>'
$replace = 'test'
$dir = 'D:\code\cpp\FileHandlingCpp\input - Cop... | <p>Maybe it would help to get back to your original goal of implementing the equivalent of the Unix version. Here is essentially the equivalent PowerShell version.</p> <pre><code>$search = '<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>' $replace = 'test' $dir = 'D:\code\cpp\FileHandlingCpp\input - Cop... | 34, 526 | powershell, unix | <h1>In place replace using powershell</h1>
<p>I am trying to write an equivalent of </p>
<pre><code>find -name "*.xml" | xargs grep -l "Search String"
| xargs perl -p -i -e 's/Search String/Replace String/g'
</code></pre>
<p>in powershell. This is what I came up with.</p>
<pre><code>Get-ChildItem 'D:\code\cp... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,029 | bash | # In place replace using powershell
I am trying to write an equivalent of
```
find -name "*.xml" | xargs grep -l "Search String"
| xargs perl -p -i -e 's/Search String/Replace String/g'
```
in powershell. This is what I came up with.
```
Get-ChildItem 'D:\code\cpp\FileHandlingCpp\input - Copy' -Recurse |
Se... | Maybe it would help to get back to your original goal of implementing the equivalent of the Unix version. Here is essentially the equivalent PowerShell version.
```
$search = '<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>'
$replace = 'test'
$dir = 'D:\code\cpp\FileHandlingCpp\input - Copy'
dir -Path $dir -... |
16680134 | Convert charset from a entire project to utf-8 | 7 | 2013-05-21 21:53:17 | <p>Hi i have a project made in windows who uses windows 1252 charset and i need to convert all my .php file to utf-8 charset because my database is all utf-8 encoded.
Is there a way to do that using linux commands or a software?</p>
| 5,084 | 1,208,060 | 2018-06-29 10:04:42 | 16,680,174 | 12 | 2013-05-21 21:56:57 | 135,724 | 2013-05-21 23:54:01 | https://stackoverflow.com/q/16680134 | https://stackoverflow.com/a/16680174 | <p>In your project's root directory, use <a href="http://man7.org/linux/man-pages/man1/find.1.html" rel="noreferrer">find(1)</a> to list all <code>*.php</code> files and combine that with <a href="http://linux.die.net/man/1/recode" rel="noreferrer">recode(1)</a> to convert those files in place:</p>
<pre><code>find . -... | <p>In your project's root directory, use <a href="http://man7.org/linux/man-pages/man1/find.1.html" rel="noreferrer">find(1)</a> to list all <code>*.php</code> files and combine that with <a href="http://linux.die.net/man/1/recode" rel="noreferrer">recode(1)</a> to convert those files in place:</p> <pre><code>find . -... | 34, 58, 387, 12658 | bash, character-encoding, linux, unix | <h1>Convert charset from a entire project to utf-8</h1>
<p>Hi i have a project made in windows who uses windows 1252 charset and i need to convert all my .php file to utf-8 charset because my database is all utf-8 encoded.
Is there a way to do that using linux commands or a software?</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,030 | bash | # Convert charset from a entire project to utf-8
Hi i have a project made in windows who uses windows 1252 charset and i need to convert all my .php file to utf-8 charset because my database is all utf-8 encoded.
Is there a way to do that using linux commands or a software? | In your project's root directory, use [find(1)](http://man7.org/linux/man-pages/man1/find.1.html) to list all `*.php` files and combine that with [recode(1)](http://linux.die.net/man/1/recode) to convert those files in place:
```
find . -type f -name '*.php' -exec recode windows1252..utf8 \{} \;
```
As an alternative... |
15428414 | How to run a .sh file from Java? | 7 | 2013-03-15 09:09:31 | <p>I need to run a .sh file from my Java code with out passing any arguments. I already tried doing it with</p>
<pre><code>Runtime.getRuntime().exec("src/lexparser.sh");
</code></pre>
<p>and</p>
<pre><code>ProcessBuilder pb = new ProcessBuilder("src/lexparser.sh");
Process p = pb.start();
</code></pre>
<p>Both of t... | 49,316 | 2,111,009 | 2016-05-19 15:09:40 | 15,428,431 | 12 | 2013-03-15 09:10:57 | 1,581,576 | 2013-03-15 09:19:54 | https://stackoverflow.com/q/15428414 | https://stackoverflow.com/a/15428431 | <pre><code>ProcessBuilder pb = new ProcessBuilder("src/lexparser.sh", "myArg1", "myArg2");
Process p = pb.start();
BufferedReader reader = new BufferedReader(new InputStreamReader(p.getInputStream()));
String line = null;
while ((line = reader.readLine()) != null)
{
System.out.println(line);
}
</code></pre>
| <pre><code>ProcessBuilder pb = new ProcessBuilder("src/lexparser.sh", "myArg1", "myArg2"); Process p = pb.start(); BufferedReader reader = new BufferedReader(new InputStreamReader(p.getInputStream())); String line = null; while ((line = reader.readLine()) != null) { System.out.println(line); } </code></pre> | 17, 390 | java, shell | <h1>How to run a .sh file from Java?</h1>
<p>I need to run a .sh file from my Java code with out passing any arguments. I already tried doing it with</p>
<pre><code>Runtime.getRuntime().exec("src/lexparser.sh");
</code></pre>
<p>and</p>
<pre><code>ProcessBuilder pb = new ProcessBuilder("src/lexparser.sh");
Process p... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,031 | bash | # How to run a .sh file from Java?
I need to run a .sh file from my Java code with out passing any arguments. I already tried doing it with
```
Runtime.getRuntime().exec("src/lexparser.sh");
```
and
```
ProcessBuilder pb = new ProcessBuilder("src/lexparser.sh");
Process p = pb.start();
```
Both of the above method... | ```
ProcessBuilder pb = new ProcessBuilder("src/lexparser.sh", "myArg1", "myArg2");
Process p = pb.start();
BufferedReader reader = new BufferedReader(new InputStreamReader(p.getInputStream()));
String line = null;
while ((line = reader.readLine()) != null)
{
System.out.println(line);
}
``` |
14196061 | different behavior of which command in zsh and bash | 7 | 2013-01-07 12:34:08 | <p>By using zsh for some time along with oh-my-zsh framework, I noticed that which command behaves different in zsh, than in bash.</p>
<p>What I mean:</p>
<pre><code># on zsh
ilias@ilias-pc ~ ➜ which ls
ls: aliased to ls --color=auto
ilias@ilias-pc ~ ➜ which which
which: shell built-in command
ilias@ilias-pc ~ ➜ b... | 4,893 | 1,069,389 | 2013-01-07 12:43:40 | 14,196,219 | 12 | 2013-01-07 12:43:40 | 495,451 | 2013-01-07 12:43:40 | https://stackoverflow.com/q/14196061 | https://stackoverflow.com/a/14196219 | <pre><code>$ zsh -c 'type which'
which is a shell builtin
$ bash -c 'type which'
which is /usr/bin/which
</code></pre>
<p>The solution is to not use <code>which(1)</code>, which is a non-standard and not very useful command. The question of what you should use instead isn't the most straightforward due to the alternat... | <pre><code>$ zsh -c 'type which' which is a shell builtin $ bash -c 'type which' which is /usr/bin/which </code></pre> <p>The solution is to not use <code>which(1)</code>, which is a non-standard and not very useful command. The question of what you should use instead isn't the most straightforward due to the alternat... | 58, 387, 3791 | bash, linux, zsh | <h1>different behavior of which command in zsh and bash</h1>
<p>By using zsh for some time along with oh-my-zsh framework, I noticed that which command behaves different in zsh, than in bash.</p>
<p>What I mean:</p>
<pre><code># on zsh
ilias@ilias-pc ~ ➜ which ls
ls: aliased to ls --color=auto
ilias@ilias-pc ~ ➜ wh... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,032 | bash | # different behavior of which command in zsh and bash
By using zsh for some time along with oh-my-zsh framework, I noticed that which command behaves different in zsh, than in bash.
What I mean:
```
# on zsh
ilias@ilias-pc ~ ➜ which ls
ls: aliased to ls --color=auto
ilias@ilias-pc ~ ➜ which which
which: shell buil... | ```
$ zsh -c 'type which'
which is a shell builtin
$ bash -c 'type which'
which is /usr/bin/which
```
The solution is to not use `which(1)`, which is a non-standard and not very useful command. The question of what you should use instead isn't the most straightforward due to the alternatives being poorly specified and... |
14130226 | ERROR: Description = Invalid query | 7 | 2013-01-02 22:25:46 | <p>Because of a messed up group policy object, multiple computers have TightVNC installed when they shouldn't. The GPO is gone, so just removing the software from there isn't an option that I'm aware of. Therefore, I'm scripting things in order to remove PowerShell from a list of computers.</p>
<p>This is my script:</... | 18,419 | 535,892 | 2016-05-27 04:36:44 | 14,132,476 | 12 | 2013-01-03 03:01:53 | 153,982 | 2013-01-03 03:01:53 | https://stackoverflow.com/q/14130226 | https://stackoverflow.com/a/14132476 | <p>You're running afoul of PowerShell's string parsing. Try this instead:</p>
<pre><code>wmic /node:$pc product where name=`"TightVNC`" call uninstall
</code></pre>
<p>Note, for those on PowerShell V3, you can use:</p>
<pre><code>wmic /node:$pc --% product where name="TightVNC" call uninstall
</code></pre>
| <p>You're running afoul of PowerShell's string parsing. Try this instead:</p> <pre><code>wmic /node:$pc product where name=`"TightVNC`" call uninstall </code></pre> <p>Note, for those on PowerShell V3, you can use:</p> <pre><code>wmic /node:$pc --% product where name="TightVNC" call uninstall </code></pre> | 526, 24067 | powershell, powershell-2.0 | <h1>ERROR: Description = Invalid query</h1>
<p>Because of a messed up group policy object, multiple computers have TightVNC installed when they shouldn't. The GPO is gone, so just removing the software from there isn't an option that I'm aware of. Therefore, I'm scripting things in order to remove PowerShell from a lis... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,033 | bash | # ERROR: Description = Invalid query
Because of a messed up group policy object, multiple computers have TightVNC installed when they shouldn't. The GPO is gone, so just removing the software from there isn't an option that I'm aware of. Therefore, I'm scripting things in order to remove PowerShell from a list of comp... | You're running afoul of PowerShell's string parsing. Try this instead:
```
wmic /node:$pc product where name=`"TightVNC`" call uninstall
```
Note, for those on PowerShell V3, you can use:
```
wmic /node:$pc --% product where name="TightVNC" call uninstall
``` |
13167580 | Email with multiple attachments | 7 | 2012-10-31 21:18:07 | <p>I am working on a PowerShell script for the help desk to use when migrating userhome folders from a server to a NAS device. The help desk user enters the usernames into the "userhomelist.txt" file.</p>
<p>My problem is that I'm not able to get the script to attach all of the log files. Only the last log file is a... | 38,422 | 1,387,745 | 2012-10-31 22:35:01 | 13,167,847 | 12 | 2012-10-31 21:40:43 | 520,612 | 2012-10-31 21:40:43 | https://stackoverflow.com/q/13167580 | https://stackoverflow.com/a/13167847 | <p>I suggest to use <a href="http://technet.microsoft.com/en-us/library/hh849925.aspx" rel="noreferrer"><code>send-mailmessage</code></a> cmdlet if you are in powershell v2 or v3.
It has an <code>-attachments</code> parameter that accept array of string ( <code>string[]</code> ).</p>
<p>You can change your variable <c... | <p>I suggest to use <a href="http://technet.microsoft.com/en-us/library/hh849925.aspx" rel="noreferrer"><code>send-mailmessage</code></a> cmdlet if you are in powershell v2 or v3. It has an <code>-attachments</code> parameter that accept array of string ( <code>string[]</code> ).</p> <p>You can change your variable <c... | 146, 526, 6166, 28647 | attachment, email, email-attachments, powershell | <h1>Email with multiple attachments</h1>
<p>I am working on a PowerShell script for the help desk to use when migrating userhome folders from a server to a NAS device. The help desk user enters the usernames into the "userhomelist.txt" file.</p>
<p>My problem is that I'm not able to get the script to attach all of th... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,034 | bash | # Email with multiple attachments
I am working on a PowerShell script for the help desk to use when migrating userhome folders from a server to a NAS device. The help desk user enters the usernames into the "userhomelist.txt" file.
My problem is that I'm not able to get the script to attach all of the log files. Only... | I suggest to use [`send-mailmessage`](http://technet.microsoft.com/en-us/library/hh849925.aspx) cmdlet if you are in powershell v2 or v3.
It has an `-attachments` parameter that accept array of string ( `string[]` ).
You can change your variable `$file` declaring it as `$file = @()` before the `foreach` user loop.
Ins... |
12587253 | how to modify GOPATH in powershell | 7 | 2012-09-25 16:31:10 | <p>I am trying to add my project directory to GOPATH, in linux I can do </p>
<p><code>export GOPATH=$HOME/mygo</code> in ~/.bashrc</p>
<p>what is the equivalence in powershell</p>
| 7,299 | 1,149,981 | 2012-09-25 17:54:09 | 12,587,443 | 12 | 2012-09-25 16:44:06 | 6,309 | 2012-09-25 17:54:09 | https://stackoverflow.com/q/12587253 | https://stackoverflow.com/a/12587443 | <p>This should follow the way you set any Environment variable with Powershell (as described in <a href="http://technet.microsoft.com/en-us/library/ff730964.aspx" rel="noreferrer">this article</a>):</p>
<p>If you want it permanent (ie will apply for any future shell):</p>
<pre><code>[Environment]::SetEnvironmentVaria... | <p>This should follow the way you set any Environment variable with Powershell (as described in <a href="http://technet.microsoft.com/en-us/library/ff730964.aspx" rel="noreferrer">this article</a>):</p> <p>If you want it permanent (ie will apply for any future shell):</p> <pre><code>[Environment]::SetEnvironmentVaria... | 526, 15627 | go, powershell | <h1>how to modify GOPATH in powershell</h1>
<p>I am trying to add my project directory to GOPATH, in linux I can do </p>
<p><code>export GOPATH=$HOME/mygo</code> in ~/.bashrc</p>
<p>what is the equivalence in powershell</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,035 | bash | # how to modify GOPATH in powershell
I am trying to add my project directory to GOPATH, in linux I can do
`export GOPATH=$HOME/mygo` in ~/.bashrc
what is the equivalence in powershell | This should follow the way you set any Environment variable with Powershell (as described in [this article](http://technet.microsoft.com/en-us/library/ff730964.aspx)):
If you want it permanent (ie will apply for any future shell):
```
[Environment]::SetEnvironmentVariable("GOPATH", "C:\Your\Path", "User")
```
> One ... |
12075642 | How to start process via SSH, so it keeps running? | 7 | 2012-08-22 14:41:50 | <p>I have three files:
monitor.sh, which starts python scripts:</p>
<pre><code>sudo python ./webCheck &
sudo python ./apiCheck &
</code></pre>
<p>and the otherones, webCheck & apiCheck: it is supposed to run in the background, after I close the terminal. It checks my other website's availability, in an en... | 9,056 | 1,328,249 | 2019-02-22 00:00:44 | 12,075,799 | 12 | 2012-08-22 14:50:09 | 1,617,188 | 2019-02-22 00:00:44 | https://stackoverflow.com/q/12075642 | https://stackoverflow.com/a/12075799 | <p>You should be able to use:</p>
<p><code>sudo nohup python ./webCheck &</code></p>
<p><code>sudo nohup python ./apiCheck &</code></p>
<p>I don't think your monitor.sh will need it, since it should take a relatively short time to start the other two. However I'm not positive if the two checks would become ... | <p>You should be able to use:</p> <p><code>sudo nohup python ./webCheck &</code></p> <p><code>sudo nohup python ./apiCheck &</code></p> <p>I don't think your monitor.sh will need it, since it should take a relatively short time to start the other two. However I'm not positive if the two checks would become ... | 386, 10327, 12375, 18860 | amazon-ec2, bitnami, sh, ssh | <h1>How to start process via SSH, so it keeps running?</h1>
<p>I have three files:
monitor.sh, which starts python scripts:</p>
<pre><code>sudo python ./webCheck &
sudo python ./apiCheck &
</code></pre>
<p>and the otherones, webCheck & apiCheck: it is supposed to run in the background, after I close the t... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,036 | bash | # How to start process via SSH, so it keeps running?
I have three files:
monitor.sh, which starts python scripts:
```
sudo python ./webCheck &
sudo python ./apiCheck &
```
and the otherones, webCheck & apiCheck: it is supposed to run in the background, after I close the terminal. It checks my other website's availab... | You should be able to use:
`sudo nohup python ./webCheck &`
`sudo nohup python ./apiCheck &`
I don't think your monitor.sh will need it, since it should take a relatively short time to start the other two. However I'm not positive if the two checks would become children of monitor.sh, which may end up being an issue... |
11719011 | sed - pass match to external command | 7 | 2012-07-30 09:50:14 | <p>I have written a little script using sed to transform this:</p>
<pre><code>kaefert@Ultrablech ~ $ cat /sys/class/power_supply/BAT0/uevent
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_STATUS=Full
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-ion
POWER_SUPPLY_CYCLE_COUNT=0
POWER_SUPPLY_VOLTAGE_MIN_DESIGN=7400000
POWER_SUP... | 7,507 | 1,561,397 | 2015-02-09 13:48:40 | 11,719,531 | 12 | 2012-07-30 10:20:31 | 164,835 | 2012-07-30 10:20:31 | https://stackoverflow.com/q/11719011 | https://stackoverflow.com/a/11719531 | <p>if your sed is GNU sed. you can use 'e' to pass matched group to external command/tools within sed command.</p>
<p>an example might be helpful to make it clear:</p>
<p>say, you have a problem:<br>
you have a string <code>"120+20foobar"</code> now you want to get the calculation result of 120+20 part, and replace "... | <p>if your sed is GNU sed. you can use 'e' to pass matched group to external command/tools within sed command.</p> <p>an example might be helpful to make it clear:</p> <p>say, you have a problem:<br> you have a string <code>"120+20foobar"</code> now you want to get the calculation result of 120+20 part, and replace "... | 4, 58, 387, 5282 | bash, css, linux, sed | <h1>sed - pass match to external command</h1>
<p>I have written a little script using sed to transform this:</p>
<pre><code>kaefert@Ultrablech ~ $ cat /sys/class/power_supply/BAT0/uevent
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_STATUS=Full
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-ion
POWER_SUPPLY_CYCLE_COUNT=0
POW... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,037 | bash | # sed - pass match to external command
I have written a little script using sed to transform this:
```
kaefert@Ultrablech ~ $ cat /sys/class/power_supply/BAT0/uevent
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_STATUS=Full
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-ion
POWER_SUPPLY_CYCLE_COUNT=0
POWER_SUPPLY_VOLTAGE_MI... | if your sed is GNU sed. you can use 'e' to pass matched group to external command/tools within sed command.
an example might be helpful to make it clear:
say, you have a problem:
you have a string `"120+20foobar"` now you want to get the calculation result of 120+20 part, and replace "oo" to "xx" in "foobar" part.
... |
10844707 | Find and replace string in parameter bash | 7 | 2012-06-01 05:07:32 | <pre><code>$ ./myscript my.site.com
</code></pre>
<p>How do I replace all dots in the first parameter? Here's my current try but it's returning a <strong>bad substition</strong> error.</p>
<pre><code>#!/bin/bash
dbname=${$1//./_}
echo $dbname
</code></pre>
| 1,531 | 1,099,531 | 2015-06-30 22:55:15 | 10,844,737 | 12 | 2012-06-01 05:11:19 | 571,189 | 2012-06-01 05:11:19 | https://stackoverflow.com/q/10844707 | https://stackoverflow.com/a/10844737 | <pre><code>dbname=${1//./_}
</code></pre>
<p>Remove <code>$</code> before 1 since <code>$1</code> and <code>${1}</code> are the same.</p>
| <pre><code>dbname=${1//./_} </code></pre> <p>Remove <code>$</code> before 1 since <code>$1</code> and <code>${1}</code> are the same.</p> | 18, 139, 387, 2498 | bash, regex, replace, string | <h1>Find and replace string in parameter bash</h1>
<pre><code>$ ./myscript my.site.com
</code></pre>
<p>How do I replace all dots in the first parameter? Here's my current try but it's returning a <strong>bad substition</strong> error.</p>
<pre><code>#!/bin/bash
dbname=${$1//./_}
echo $dbname
</code></pre>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,038 | bash | # Find and replace string in parameter bash
```
$ ./myscript my.site.com
```
How do I replace all dots in the first parameter? Here's my current try but it's returning a **bad substition** error.
```
#!/bin/bash
dbname=${$1//./_}
echo $dbname
``` | ```
dbname=${1//./_}
```
Remove `$` before 1 since `$1` and `${1}` are the same. |
10458743 | bash: reading text from a string one character at a time, with whitespace | 7 | 2012-05-05 04:05:24 | <p>I'm bored, and decided to write a script for a text-based adventure of mine using bash. Basically, it's supposed to animate a typewriter in certain cases for dramatic storytelling. I can do this manually in a file like so:</p>
<pre><code>sleep 0.1
echo -n "h"
sleep 0.1
echo -n "e"
sleep 0.1
echo -n "l"
sleep 0.1... | 7,001 | 1,186,723 | 2013-01-21 23:06:51 | 10,458,814 | 12 | 2012-05-05 04:21:34 | 736,937 | 2012-05-05 04:32:37 | https://stackoverflow.com/q/10458743 | https://stackoverflow.com/a/10458814 | <p>How about </p>
<pre><code>#!/bin/bash
function typewriter
{
text="$1"
delay="$2"
for i in $(seq 0 $(expr length "${text}")) ; do
echo -n "${text:$i:1}"
sleep ${delay}
done
}
typewriter "Typewriters are cool." .1
echo # <-- Just for a newline
</code></pre>
| <p>How about </p> <pre><code>#!/bin/bash function typewriter { text="$1" delay="$2" for i in $(seq 0 $(expr length "${text}")) ; do echo -n "${text:$i:1}" sleep ${delay} done } typewriter "Typewriters are cool." .1 echo # <-- Just for a newline </code></pre> | 387, 2221, 10256, 26793 | bash, char, ifs, sleep | <h1>bash: reading text from a string one character at a time, with whitespace</h1>
<p>I'm bored, and decided to write a script for a text-based adventure of mine using bash. Basically, it's supposed to animate a typewriter in certain cases for dramatic storytelling. I can do this manually in a file like so:</p>
<pre><... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,039 | bash | # bash: reading text from a string one character at a time, with whitespace
I'm bored, and decided to write a script for a text-based adventure of mine using bash. Basically, it's supposed to animate a typewriter in certain cases for dramatic storytelling. I can do this manually in a file like so:
```
sleep 0.1
echo... | How about
```
#!/bin/bash
function typewriter
{
text="$1"
delay="$2"
for i in $(seq 0 $(expr length "${text}")) ; do
echo -n "${text:$i:1}"
sleep ${delay}
done
}
typewriter "Typewriters are cool." .1
echo # <-- Just for a newline
``` |
10329804 | How do I loop through a CSV file with a batch or PowerShell script? | 7 | 2012-04-26 08:32:40 | <p>I have a CSV file with two different columns, one with PC names and one with MAC addresses like this:</p>
<pre><code>PCxxxx 00-11-22-33-44-55
...
...
</code></pre>
<p>These values should be placed into the following CLI command:</p>
<pre><code>wdsutil /Set-Device /Device:PCxxxx /ID:00-11-22-33-44-55
</code></pre>... | 21,560 | 906,738 | 2017-05-28 22:14:26 | 10,330,144 | 12 | 2012-04-26 08:53:30 | 73,070 | 2012-04-26 08:53:30 | https://stackoverflow.com/q/10329804 | https://stackoverflow.com/a/10330144 | <p>In a batch file:</p>
<pre><code>for /f "tokens=1,2 delims= " %%a in (foo.csv) do (
wdsutil /Set-Device /Device:%%a /ID:%%b
)
</code></pre>
<p>Actually, you can do that as a one-liner from <code>cmd</code> directly:</p>
<pre><code>for /f "tokens=1,2 delims= " %a in (foo.csv) do wdsutil /Set-Device /Device:%a /... | <p>In a batch file:</p> <pre><code>for /f "tokens=1,2 delims= " %%a in (foo.csv) do ( wdsutil /Set-Device /Device:%%a /ID:%%b ) </code></pre> <p>Actually, you can do that as a one-liner from <code>cmd</code> directly:</p> <pre><code>for /f "tokens=1,2 delims= " %a in (foo.csv) do wdsutil /Set-Device /Device:%a /... | 526, 2631, 7002 | batch-file, cmd, powershell | <h1>How do I loop through a CSV file with a batch or PowerShell script?</h1>
<p>I have a CSV file with two different columns, one with PC names and one with MAC addresses like this:</p>
<pre><code>PCxxxx 00-11-22-33-44-55
...
...
</code></pre>
<p>These values should be placed into the following CLI command:</p>
<pre... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,040 | bash | # How do I loop through a CSV file with a batch or PowerShell script?
I have a CSV file with two different columns, one with PC names and one with MAC addresses like this:
```
PCxxxx 00-11-22-33-44-55
...
...
```
These values should be placed into the following CLI command:
```
wdsutil /Set-Device /Device:PCxxxx /I... | In a batch file:
```
for /f "tokens=1,2 delims= " %%a in (foo.csv) do (
wdsutil /Set-Device /Device:%%a /ID:%%b
)
```
Actually, you can do that as a one-liner from `cmd` directly:
```
for /f "tokens=1,2 delims= " %a in (foo.csv) do wdsutil /Set-Device /Device:%a /ID:%b
```
In PowerShell you can use a similar id... |
10076159 | Python: switching from optparse to argparse | 7 | 2012-04-09 16:16:20 | <p>After switching from optparse to argparse - I'm experiencing strange errors. Argparse parse args only if leave no space:</p>
<pre><code>myScript.py -oOpt
</code></pre>
<p>or put an equal sign:</p>
<pre><code>myScript.py -o=Opt
</code></pre>
<p>and it doesn't work the normal way:</p>
<pre><code>myScript.py -o Op... | 5,114 | 788,700 | 2012-04-13 10:34:03 | 10,108,121 | 12 | 2012-04-11 14:36:05 | 410,889 | 2012-04-11 16:33:36 | https://stackoverflow.com/q/10076159 | https://stackoverflow.com/a/10108121 | <p>First, it is necessary to make a small distinction. The <code>argparse</code> module does not parse your command-line arguments, the shell does. The shell is responsible for transforming the line you type in the shell into tokens, which are then passed to <code>sys.argv</code>, a python array/sequence of command-lin... | <p>First, it is necessary to make a small distinction. The <code>argparse</code> module does not parse your command-line arguments, the shell does. The shell is responsible for transforming the line you type in the shell into tokens, which are then passed to <code>sys.argv</code>, a python array/sequence of command-lin... | 16, 390, 17418, 31134, 59189 | argparse, command-line-arguments, optparse, python, shell | <h1>Python: switching from optparse to argparse</h1>
<p>After switching from optparse to argparse - I'm experiencing strange errors. Argparse parse args only if leave no space:</p>
<pre><code>myScript.py -oOpt
</code></pre>
<p>or put an equal sign:</p>
<pre><code>myScript.py -o=Opt
</code></pre>
<p>and it doesn't w... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,041 | bash | # Python: switching from optparse to argparse
After switching from optparse to argparse - I'm experiencing strange errors. Argparse parse args only if leave no space:
```
myScript.py -oOpt
```
or put an equal sign:
```
myScript.py -o=Opt
```
and it doesn't work the normal way:
```
myScript.py -o Opt
```
Here's m... | First, it is necessary to make a small distinction. The `argparse` module does not parse your command-line arguments, the shell does. The shell is responsible for transforming the line you type in the shell into tokens, which are then passed to `sys.argv`, a python array/sequence of command-line arguments. The `argpars... |
10096785 | Set Property in PowerShell Module | 7 | 2012-04-10 21:34:41 | <p>I have a PowerShell module called Test.psm1. I want to set a value on a variable and have that accessible when I call another method in that module.</p>
<pre><code>#Test.psm1
$property = 'Default Value'
function Set-Property([string]$Value)
{
$property = $Value
}
function Get-Property
{
Write-Host $prop... | 4,908 | 46,420 | 2013-11-19 18:42:44 | 10,097,277 | 12 | 2012-04-10 22:18:23 | 284,111 | 2012-04-10 22:18:23 | https://stackoverflow.com/q/10096785 | https://stackoverflow.com/a/10097277 | <p>Jamey is correct. In your example, in the first line, <code>$property = 'Default Value'</code> denotes a file-scoped variable. In <code>Set-Property</code> function, when you assign, you assign to localy scoped variable that is not visible outside the function. Finally, in <code>Get-Property</code>, since there is n... | <p>Jamey is correct. In your example, in the first line, <code>$property = 'Default Value'</code> denotes a file-scoped variable. In <code>Set-Property</code> function, when you assign, you assign to localy scoped variable that is not visible outside the function. Finally, in <code>Get-Property</code>, since there is n... | 526, 24067 | powershell, powershell-2.0 | <h1>Set Property in PowerShell Module</h1>
<p>I have a PowerShell module called Test.psm1. I want to set a value on a variable and have that accessible when I call another method in that module.</p>
<pre><code>#Test.psm1
$property = 'Default Value'
function Set-Property([string]$Value)
{
$property = $Value
}
fu... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,042 | bash | # Set Property in PowerShell Module
I have a PowerShell module called Test.psm1. I want to set a value on a variable and have that accessible when I call another method in that module.
```
#Test.psm1
$property = 'Default Value'
function Set-Property([string]$Value)
{
$property = $Value
}
function Get-Property
... | Jamey is correct. In your example, in the first line, `$property = 'Default Value'` denotes a file-scoped variable. In `Set-Property` function, when you assign, you assign to localy scoped variable that is not visible outside the function. Finally, in `Get-Property`, since there is no locally scoped variable with the s... |
9216553 | try-catch-fail with powershell and schtasks | 7 | 2012-02-09 18:26:30 | <p>I'm new to powershell, but I'm trying to output some simple logging in a ps I'm writing to create scheduled tasks. My code is below. It seems that it doesn't throw an exception when you get an error with schtasks. Another SO question mentioned this with fileIO actions and suggested doing "-ea stop" but that doesn... | 7,022 | null | 2012-02-14 16:55:24 | 9,217,630 | 12 | 2012-02-09 19:45:54 | 1,192,681 | 2012-02-09 19:54:23 | https://stackoverflow.com/q/9216553 | https://stackoverflow.com/a/9217630 | <p>In order for a Try/Catch to work, PowerShell needs a terminating exception. When running a cmdlet in a Try block you can make that happen by using -erroraction Stop (or use the -ea alias). As you already realize SCHTASKS.EXE can't do this. Without a terminating exception, the code in the Catch block will never run.<... | <p>In order for a Try/Catch to work, PowerShell needs a terminating exception. When running a cmdlet in a Try block you can make that happen by using -erroraction Stop (or use the -ea alias). As you already realize SCHTASKS.EXE can't do this. Without a terminating exception, the code in the Catch block will never run.<... | 526, 24067 | powershell, powershell-2.0 | <h1>try-catch-fail with powershell and schtasks</h1>
<p>I'm new to powershell, but I'm trying to output some simple logging in a ps I'm writing to create scheduled tasks. My code is below. It seems that it doesn't throw an exception when you get an error with schtasks. Another SO question mentioned this with fileIO ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,043 | bash | # try-catch-fail with powershell and schtasks
I'm new to powershell, but I'm trying to output some simple logging in a ps I'm writing to create scheduled tasks. My code is below. It seems that it doesn't throw an exception when you get an error with schtasks. Another SO question mentioned this with fileIO actions and ... | In order for a Try/Catch to work, PowerShell needs a terminating exception. When running a cmdlet in a Try block you can make that happen by using -erroraction Stop (or use the -ea alias). As you already realize SCHTASKS.EXE can't do this. Without a terminating exception, the code in the Catch block will never run.
Wh... |
8980791 | Shell scripting - which word is first alphabetically? | 7 | 2012-01-24 00:54:37 | <p>How can you check which words is first alphabetically between two words?
For example in the code</p>
<pre><code>#!/bin/bash
var1="apple"
var2="bye"
if [ $var1 \> $var2 ]
then
echo $var1
else
echo $var2
fi
</code></pre>
<p>I want it to print apple, since apple comes before bye alphabetically, but it isnt worki... | 6,079 | 1,161,080 | 2018-02-08 00:38:56 | 8,980,915 | 12 | 2012-01-24 01:12:22 | 14,860 | 2018-02-08 00:38:56 | https://stackoverflow.com/q/8980791 | https://stackoverflow.com/a/8980915 | <p>What you need to do to solve the immediate problem is reverse the sense of your statement, since the "less than" operator is <code><</code> rather than <code>></code>.</p>
<p>Doing so will get it working correctly:</p>
<pre><code>if [ $var1 \< $var2 ]
</code></pre>
<hr>
<p>Alternatively, you can use the... | <p>What you need to do to solve the immediate problem is reverse the sense of your statement, since the "less than" operator is <code><</code> rather than <code>></code>.</p> <p>Doing so will get it working correctly:</p> <pre><code>if [ $var1 \< $var2 ] </code></pre> <hr> <p>Alternatively, you can use the... | 387, 390, 27797 | alphabetical, bash, shell | <h1>Shell scripting - which word is first alphabetically?</h1>
<p>How can you check which words is first alphabetically between two words?
For example in the code</p>
<pre><code>#!/bin/bash
var1="apple"
var2="bye"
if [ $var1 \> $var2 ]
then
echo $var1
else
echo $var2
fi
</code></pre>
<p>I want it to print apple,... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,044 | bash | # Shell scripting - which word is first alphabetically?
How can you check which words is first alphabetically between two words?
For example in the code
```
#!/bin/bash
var1="apple"
var2="bye"
if [ $var1 \> $var2 ]
then
echo $var1
else
echo $var2
fi
```
I want it to print apple, since apple comes before bye alphab... | What you need to do to solve the immediate problem is reverse the sense of your statement, since the "less than" operator is `<` rather than `>`.
Doing so will get it working correctly:
```
if [ $var1 \< $var2 ]
```
---
Alternatively, you can use the `[[` variant which *doesn't* require the escaping:
```
if [[ $va... |
8919350 | not able to source a property file in shell script | 7 | 2012-01-19 00:04:27 | <p>I tried the following two ways to source the property file </p>
<pre><code>#!/bin/sh
. import.properties
echo $USER_ID
echo $INPUT_FILE
</code></pre>
<p>It says :</p>
<pre><code>./test.sh[3]: import.properties: not found
</code></pre>
<p>when tried using <code>source import.properties</code> it gave the message... | 8,446 | 1,112,640 | 2015-08-24 00:59:06 | 8,919,451 | 12 | 2012-01-19 00:18:14 | 15,168 | 2012-01-19 00:18:14 | https://stackoverflow.com/q/8919350 | https://stackoverflow.com/a/8919451 | <p>To be found by the dot <code>.</code> command, the file must be readable (not necessarily executable) and on your PATH (and to be safely usable, it must contain shell script).</p>
<p>If the file is in your current directory and <code>.</code> (the directory, not the command) is not on your PATH, you can use:</p>
<... | <p>To be found by the dot <code>.</code> command, the file must be readable (not necessarily executable) and on your PATH (and to be safely usable, it must contain shell script).</p> <p>If the file is in your current directory and <code>.</code> (the directory, not the command) is not on your PATH, you can use:</p> <... | 34, 390 | shell, unix | <h1>not able to source a property file in shell script</h1>
<p>I tried the following two ways to source the property file </p>
<pre><code>#!/bin/sh
. import.properties
echo $USER_ID
echo $INPUT_FILE
</code></pre>
<p>It says :</p>
<pre><code>./test.sh[3]: import.properties: not found
</code></pre>
<p>when tried usi... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,045 | bash | # not able to source a property file in shell script
I tried the following two ways to source the property file
```
#!/bin/sh
. import.properties
echo $USER_ID
echo $INPUT_FILE
```
It says :
```
./test.sh[3]: import.properties: not found
```
when tried using `source import.properties` it gave the message as:
```... | To be found by the dot `.` command, the file must be readable (not necessarily executable) and on your PATH (and to be safely usable, it must contain shell script).
If the file is in your current directory and `.` (the directory, not the command) is not on your PATH, you can use:
```
. ./import.properties
```
Otherw... |
8157779 | Output Cygwin/bash results to text file | 7 | 2011-11-16 19:53:10 | <p>I'm writing a script that will run from the Task Scheduler. It's not executing correctly from the Scheduler, but will execute correctly from the command line. (Possibly a permissions issue?) I wanted to redirect the output to a text file, but I'm getting an empty <code>results.txt</code> file when executed from ei... | 17,310 | 263,000 | 2024-07-24 08:09:24 | 8,167,099 | 12 | 2011-11-17 12:30:21 | 843,804 | 2011-11-17 12:30:21 | https://stackoverflow.com/q/8157779 | https://stackoverflow.com/a/8167099 | <p>Maybe your script writes to the standard error (<code>stderr</code>). Try changing</p>
<pre><code>C:\cygwin\bin\bash --login -i D:\scripts\myscript.sh > results.txt
</code></pre>
<p>to</p>
<pre><code>C:\cygwin\bin\bash --login -i D:\scripts\myscript.sh > results.txt 2>&1
</code></pre>
<p>It's redir... | <p>Maybe your script writes to the standard error (<code>stderr</code>). Try changing</p> <pre><code>C:\cygwin\bin\bash --login -i D:\scripts\myscript.sh > results.txt </code></pre> <p>to</p> <pre><code>C:\cygwin\bin\bash --login -i D:\scripts\myscript.sh > results.txt 2>&1 </code></pre> <p>It's redir... | 387, 1731, 5370, 7002 | bash, batch-file, cygwin, dos | <h1>Output Cygwin/bash results to text file</h1>
<p>I'm writing a script that will run from the Task Scheduler. It's not executing correctly from the Scheduler, but will execute correctly from the command line. (Possibly a permissions issue?) I wanted to redirect the output to a text file, but I'm getting an empty <c... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,046 | bash | # Output Cygwin/bash results to text file
I'm writing a script that will run from the Task Scheduler. It's not executing correctly from the Scheduler, but will execute correctly from the command line. (Possibly a permissions issue?) I wanted to redirect the output to a text file, but I'm getting an empty `results.txt`... | Maybe your script writes to the standard error (`stderr`). Try changing
```
C:\cygwin\bin\bash --login -i D:\scripts\myscript.sh > results.txt
```
to
```
C:\cygwin\bin\bash --login -i D:\scripts\myscript.sh > results.txt 2>&1
```
It's redirects `stderr` too to the file. |
8083014 | Equivalent of net use (to list computer's connections) in powershell? | 7 | 2011-11-10 16:39:01 | <p>According to windows help NET USE, when used without options, lists the computer's connections. </p>
<p>I'd like to find a way in powershell to get a list of the Remote entries in net use's output.</p>
<p>I know that as an extreme measure I can parse the result of the "net use" command itself, but I'd rather not ... | 12,050 | 117,126 | 2011-11-10 20:41:24 | 8,083,641 | 12 | 2011-11-10 17:21:56 | 608,772 | 2011-11-10 20:41:24 | https://stackoverflow.com/q/8083014 | https://stackoverflow.com/a/8083641 | <p>For the mapped logical drive you can use WMI class <a href="http://msdn.microsoft.com/en-us/library/windows/desktop/aa394194%28v=vs.85%29.aspx" rel="noreferrer">Win32_MappedLogicalDisk</a> :</p>
<pre><code>Get-WmiObject Win32_MappedLogicalDisk
</code></pre>
<p>Here is another way with <a href="http://msdn.microsof... | <p>For the mapped logical drive you can use WMI class <a href="http://msdn.microsoft.com/en-us/library/windows/desktop/aa394194%28v=vs.85%29.aspx" rel="noreferrer">Win32_MappedLogicalDisk</a> :</p> <pre><code>Get-WmiObject Win32_MappedLogicalDisk </code></pre> <p>Here is another way with <a href="http://msdn.microsof... | 64, 526, 28183 | net-use, powershell, windows | <h1>Equivalent of net use (to list computer's connections) in powershell?</h1>
<p>According to windows help NET USE, when used without options, lists the computer's connections. </p>
<p>I'd like to find a way in powershell to get a list of the Remote entries in net use's output.</p>
<p>I know that as an extreme meas... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,047 | bash | # Equivalent of net use (to list computer's connections) in powershell?
According to windows help NET USE, when used without options, lists the computer's connections.
I'd like to find a way in powershell to get a list of the Remote entries in net use's output.
I know that as an extreme measure I can parse the resul... | For the mapped logical drive you can use WMI class [Win32_MappedLogicalDisk](http://msdn.microsoft.com/en-us/library/windows/desktop/aa394194%28v=vs.85%29.aspx) :
```
Get-WmiObject Win32_MappedLogicalDisk
```
Here is another way with [Win32_LogicalDisk](http://msdn.microsoft.com/en-us/library/windows/desktop/aa394173... |
8059196 | What does ${VARIABLE+set} mean? | 7 | 2011-11-09 01:03:14 | <p>I'm looking through someone else's code and am not sure what this means. It is either a variable call <code>VARIABLE+set</code> which is a strange variable name since is has a <code>+</code>, or is is evaluated and is hard to Google because it has ${} in it ;)</p>
| 1,800 | 616,644 | 2011-11-09 01:03:43 | 8,059,201 | 12 | 2011-11-09 01:03:43 | 616,644 | 2011-11-09 01:03:43 | https://stackoverflow.com/q/8059196 | https://stackoverflow.com/a/8059201 | <p>It took be some time, but I found a <a href="http://tldp.org/LDP/abs/html/parameter-substitution.html" rel="noreferrer">link</a> explaining what this does. It is a form of bash parameter-substitution that will evaluate to <code>"set"</code> if <code>$VARIABLE</code> has been set and null otherwise. This allows you... | <p>It took be some time, but I found a <a href="http://tldp.org/LDP/abs/html/parameter-substitution.html" rel="noreferrer">link</a> explaining what this does. It is a form of bash parameter-substitution that will evaluate to <code>"set"</code> if <code>$VARIABLE</code> has been set and null otherwise. This allows you... | 387 | bash | <h1>What does ${VARIABLE+set} mean?</h1>
<p>I'm looking through someone else's code and am not sure what this means. It is either a variable call <code>VARIABLE+set</code> which is a strange variable name since is has a <code>+</code>, or is is evaluated and is hard to Google because it has ${} in it ;)</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,048 | bash | # What does ${VARIABLE+set} mean?
I'm looking through someone else's code and am not sure what this means. It is either a variable call `VARIABLE+set` which is a strange variable name since is has a `+`, or is is evaluated and is hard to Google because it has ${} in it ;) | It took be some time, but I found a [link](http://tldp.org/LDP/abs/html/parameter-substitution.html) explaining what this does. It is a form of bash parameter-substitution that will evaluate to `"set"` if `$VARIABLE` has been set and null otherwise. This allows you to check if a variable is set by doing the following:
... |
7879493 | How to prevent Bash's while loop from trimming whitespace? | 7 | 2011-10-24 17:36:47 | <p>I need to pipe data into a while loop in a bash script, but it keeps trimming the whitespace. For example:</p>
<pre><code>echo " test" | while read i; do echo "$i"; done
</code></pre>
<p>How can I prevent it from doing this?</p>
<p>Thanks!</p>
| 1,277 | 1,011,363 | 2011-10-24 17:39:56 | 7,879,523 | 12 | 2011-10-24 17:39:56 | 430,749 | 2011-10-24 17:39:56 | https://stackoverflow.com/q/7879493 | https://stackoverflow.com/a/7879523 | <pre><code>echo " test" | while IFS= read i; do echo "$i"; done
</code></pre>
| <pre><code>echo " test" | while IFS= read i; do echo "$i"; done </code></pre> | 387 | bash | <h1>How to prevent Bash's while loop from trimming whitespace?</h1>
<p>I need to pipe data into a while loop in a bash script, but it keeps trimming the whitespace. For example:</p>
<pre><code>echo " test" | while read i; do echo "$i"; done
</code></pre>
<p>How can I prevent it from doing this?</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 | 11,049 | bash | # How to prevent Bash's while loop from trimming whitespace?
I need to pipe data into a while loop in a bash script, but it keeps trimming the whitespace. For example:
```
echo " test" | while read i; do echo "$i"; done
```
How can I prevent it from doing this?
Thanks! | ```
echo " test" | while IFS= read i; do echo "$i"; done
``` |
7128392 | Making the title of a directory the date in bash? | 7 | 2011-08-19 23:24:51 | <p>I want to make the current date into the title of a directory in <code>/home/chris/Downloads</code> by using <code>mkdir</code> and <code>date -I</code></p>
<p>I tried
mkdir "date -I"
that gets me a folder <i>named</i> "date -I" Without the quotes it gives the error</p>
<pre><code>mkdir: invalid option -- 'I'
... | 11,410 | 793,666 | 2014-01-12 02:27:15 | 7,128,418 | 12 | 2011-08-19 23:28:30 | 816,210 | 2011-08-19 23:28:30 | https://stackoverflow.com/q/7128392 | https://stackoverflow.com/a/7128418 | <p>Your syntax is wrong:</p>
<pre><code>mkdir -p /home/chris/downloads/$(date -I)
</code></pre>
<p>or</p>
<pre><code>mkdir -p /home/chris/downloads/`date -I`
</code></pre>
<p>will work</p>
| <p>Your syntax is wrong:</p> <pre><code>mkdir -p /home/chris/downloads/$(date -I) </code></pre> <p>or</p> <pre><code>mkdir -p /home/chris/downloads/`date -I` </code></pre> <p>will work</p> | 58, 387, 390, 67982 | bash, linux, shell, ubuntu-11.04 | <h1>Making the title of a directory the date in bash?</h1>
<p>I want to make the current date into the title of a directory in <code>/home/chris/Downloads</code> by using <code>mkdir</code> and <code>date -I</code></p>
<p>I tried
mkdir "date -I"
that gets me a folder <i>named</i> "date -I" Without the quotes it gi... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,050 | bash | # Making the title of a directory the date in bash?
I want to make the current date into the title of a directory in `/home/chris/Downloads` by using `mkdir` and `date -I`
I tried
mkdir "date -I"
that gets me a folder *named* "date -I" Without the quotes it gives the error
```
mkdir: invalid option -- 'I'
```
Tryin... | Your syntax is wrong:
```
mkdir -p /home/chris/downloads/$(date -I)
```
or
```
mkdir -p /home/chris/downloads/`date -I`
```
will work |
6573308 | Removing all ACL on folder with powershell | 7 | 2011-07-04 15:17:55 | <p>I'm pretty new to powershell scripting (nearly 1 month since I started learning powershell.)</p>
<p>I'm currently working on a script with powershell 2.0 to clean folder NTFS ACL. I want to delete every acl except the administrator one.</p>
<p>My problem is that I can't find a way to delete every acl that are not ... | 55,585 | 791,066 | 2017-12-14 07:18:41 | 6,579,461 | 12 | 2011-07-05 07:53:06 | 791,066 | 2011-07-05 07:59:46 | https://stackoverflow.com/q/6573308 | https://stackoverflow.com/a/6579461 | <p>This code remove acl :</p>
<pre><code>$acl = Get-Acl \\remote_server\share_folder\HAL.9000
$acl.Access | %{$acl.RemoveAccessRule($_)}
</code></pre>
<p>This code add administrator acl :</p>
<pre><code>#BUILTIN administrator
$acl = Get-Acl \\remote_server\share_folder\HAL.9000
$permission = "BUILTIN\Administrator... | <p>This code remove acl :</p> <pre><code>$acl = Get-Acl \\remote_server\share_folder\HAL.9000 $acl.Access | %{$acl.RemoveAccessRule($_)} </code></pre> <p>This code add administrator acl :</p> <pre><code>#BUILTIN administrator $acl = Get-Acl \\remote_server\share_folder\HAL.9000 $permission = "BUILTIN\Administrator... | 64, 526, 1576, 3176, 36466 | acl, ntfs, powershell, windows, windows-server-2008-r2 | <h1>Removing all ACL on folder with powershell</h1>
<p>I'm pretty new to powershell scripting (nearly 1 month since I started learning powershell.)</p>
<p>I'm currently working on a script with powershell 2.0 to clean folder NTFS ACL. I want to delete every acl except the administrator one.</p>
<p>My problem is that ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,051 | bash | # Removing all ACL on folder with powershell
I'm pretty new to powershell scripting (nearly 1 month since I started learning powershell.)
I'm currently working on a script with powershell 2.0 to clean folder NTFS ACL. I want to delete every acl except the administrator one.
My problem is that I can't find a way to d... | This code remove acl :
```
$acl = Get-Acl \\remote_server\share_folder\HAL.9000
$acl.Access | %{$acl.RemoveAccessRule($_)}
```
This code add administrator acl :
```
#BUILTIN administrator
$acl = Get-Acl \\remote_server\share_folder\HAL.9000
$permission = "BUILTIN\Administrators","FullControl", "ContainerInherit,Ob... |
6519224 | bash: Variable name directly followed by other parameters? | 7 | 2011-06-29 10:32:27 | <p>My bash scripts has a variable <code>$c</code> which is called within a <code>sed</code>-line, <em>directly followed by another parameter</em> - and bash (actually fairly logical) seems to think that the <em>other parameter</em> belong to the variable name, rendering it useless/empty.</p>
<pre><code>(...)
c=$(print... | 2,960 | 758,979 | 2011-06-30 07:20:56 | 6,519,268 | 12 | 2011-06-29 10:35:23 | 14,860 | 2011-06-30 07:20:56 | https://stackoverflow.com/q/6519224 | https://stackoverflow.com/a/6519268 | <p>You need to use <code>${c}q</code> to prevent the greedy treatment (<code>bash</code> trying to use as many valid characters as possible):</p>
<pre><code>pax$ export cq=111
pax$ export c=222
pax$ echo $cq
111
pax$ echo ${c}q
222q
</code></pre>
<hr>
<p>I should also mention that, if performance is important to ... | <p>You need to use <code>${c}q</code> to prevent the greedy treatment (<code>bash</code> trying to use as many valid characters as possible):</p> <pre><code>pax$ export cq=111 pax$ export c=222 pax$ echo $cq 111 pax$ echo ${c}q 222q </code></pre> <hr> <p>I should also mention that, if performance is important to ... | 276, 387 | bash, variables | <h1>bash: Variable name directly followed by other parameters?</h1>
<p>My bash scripts has a variable <code>$c</code> which is called within a <code>sed</code>-line, <em>directly followed by another parameter</em> - and bash (actually fairly logical) seems to think that the <em>other parameter</em> belong to the variab... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,052 | bash | # bash: Variable name directly followed by other parameters?
My bash scripts has a variable `$c` which is called within a `sed`-line, *directly followed by another parameter* - and bash (actually fairly logical) seems to think that the *other parameter* belong to the variable name, rendering it useless/empty.
```
(..... | You need to use `${c}q` to prevent the greedy treatment (`bash` trying to use as many valid characters as possible):
```
pax$ export cq=111
pax$ export c=222
pax$ echo $cq
111
pax$ echo ${c}q
222q
```
---
I should also mention that, if performance is important to you, you want to try and minimise how many externa... |
6087421 | ant Permission Denied problem | 7 | 2011-05-22 10:46:42 | <p>After extracting and saving the ant files into an opt/ directory and setting the path variable
to <code>$ANT_HOME/bin</code></p>
<p>I ran the following command on a CentOS 5</p>
<pre><code>ant -version
</code></pre>
<p>and I am getting the following error</p>
<pre><code>-bash:/path/opt/apache-ant-1.8.2/bin/ant: ... | 16,871 | 648,927 | 2011-05-22 10:48:36 | 6,087,427 | 12 | 2011-05-22 10:48:36 | 217,588 | 2011-05-22 10:48:36 | https://stackoverflow.com/q/6087421 | https://stackoverflow.com/a/6087427 | <p>If you own the file, try</p>
<pre><code>chmod u+x /path/opt/apache-ant-1.8.2/bin/ant
</code></pre>
<p>If someone else owns it, either <code>sudo</code> or become root then</p>
<pre><code>chmod 755 /path/opt/apache-ant-1.8.2/bin/ant
</code></pre>
<p>You need to have execute permissions on the file; the first give... | <p>If you own the file, try</p> <pre><code>chmod u+x /path/opt/apache-ant-1.8.2/bin/ant </code></pre> <p>If someone else owns it, either <code>sudo</code> or become root then</p> <pre><code>chmod 755 /path/opt/apache-ant-1.8.2/bin/ant </code></pre> <p>You need to have execute permissions on the file; the first give... | 34, 58, 142, 390, 4956 | ant, centos, linux, shell, unix | <h1>ant Permission Denied problem</h1>
<p>After extracting and saving the ant files into an opt/ directory and setting the path variable
to <code>$ANT_HOME/bin</code></p>
<p>I ran the following command on a CentOS 5</p>
<pre><code>ant -version
</code></pre>
<p>and I am getting the following error</p>
<pre><code>-ba... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,053 | bash | # ant Permission Denied problem
After extracting and saving the ant files into an opt/ directory and setting the path variable
to `$ANT_HOME/bin`
I ran the following command on a CentOS 5
```
ant -version
```
and I am getting the following error
```
-bash:/path/opt/apache-ant-1.8.2/bin/ant: Permission denied
```
... | If you own the file, try
```
chmod u+x /path/opt/apache-ant-1.8.2/bin/ant
```
If someone else owns it, either `sudo` or become root then
```
chmod 755 /path/opt/apache-ant-1.8.2/bin/ant
```
You need to have execute permissions on the file; the first gives execute permissions to the owner only and is probably prefer... |
5992638 | Shell script random number generating | 7 | 2011-05-13 13:31:33 | <p><code>var=$RANDOM</code> creates random numbers but how can i specify a range like between 0 and 12 for instance?</p>
| 17,026 | 663,229 | 2014-10-14 05:17:32 | 5,992,686 | 12 | 2011-05-13 13:34:44 | 430,766 | 2011-05-13 14:33:44 | https://stackoverflow.com/q/5992638 | https://stackoverflow.com/a/5992686 | <p>If you already have your random number, you can say</p>
<pre><code>var=$RANDOM
var=$[ $var % 13 ]
</code></pre>
<p>to get numbers from <code>0..12</code>.</p>
<p><strong>Edit:</strong>
If you want to produce numbers from <code>$x</code> to <code>$y</code>, you can easily modify this:</p>
<pre><code>var=$[ $x + $... | <p>If you already have your random number, you can say</p> <pre><code>var=$RANDOM var=$[ $var % 13 ] </code></pre> <p>to get numbers from <code>0..12</code>.</p> <p><strong>Edit:</strong> If you want to produce numbers from <code>$x</code> to <code>$y</code>, you can easily modify this:</p> <pre><code>var=$[ $x + $... | 197, 276, 387, 390 | bash, random, shell, variables | <h1>Shell script random number generating</h1>
<p><code>var=$RANDOM</code> creates random numbers but how can i specify a range like between 0 and 12 for instance?</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,054 | bash | # Shell script random number generating
`var=$RANDOM` creates random numbers but how can i specify a range like between 0 and 12 for instance? | If you already have your random number, you can say
```
var=$RANDOM
var=$[ $var % 13 ]
```
to get numbers from `0..12`.
**Edit:**
If you want to produce numbers from `$x` to `$y`, you can easily modify this:
```
var=$[ $x + $var % ($y + 1 - $x) ]
``` |
5987448 | Use of the 'hash' command | 7 | 2011-05-13 05:05:14 | <p>I'm working on a small app based on ffmpeg, and I read a <a href="http://ubuntuforums.org/archive/index.php/t-1438052.html" rel="nofollow noreferrer">tutorial made for ubuntu</a> where they advise to use the command <code>hash</code> on the produced executable.</p>
<p>I'm curious about that command, did you ever us... | 17,737 | 237,447 | 2019-03-25 15:20:28 | 5,987,499 | 12 | 2011-05-13 05:13:54 | 377,270 | 2019-03-25 15:20:28 | https://stackoverflow.com/q/5987448 | https://stackoverflow.com/a/5987499 | <p><code>hash</code> isn't actually your history; it is a <code>bash(1)</code> shell built-in that maintains a hash table of recently executed programs:</p>
<blockquote>
<p>Bash uses a hash table to remember the full pathnames of executable files (see hash under SHELL BUILTIN COMMANDS below). A full search of the d... | <p><code>hash</code> isn't actually your history; it is a <code>bash(1)</code> shell built-in that maintains a hash table of recently executed programs:</p> <blockquote> <p>Bash uses a hash table to remember the full pathnames of executable files (see hash under SHELL BUILTIN COMMANDS below). A full search of the d... | 387, 581, 3847 | bash, ffmpeg, hash | <h1>Use of the 'hash' command</h1>
<p>I'm working on a small app based on ffmpeg, and I read a <a href="http://ubuntuforums.org/archive/index.php/t-1438052.html" rel="nofollow noreferrer">tutorial made for ubuntu</a> where they advise to use the command <code>hash</code> on the produced executable.</p>
<p>I'm curious ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,055 | bash | # Use of the 'hash' command
I'm working on a small app based on ffmpeg, and I read a [tutorial made for ubuntu](http://ubuntuforums.org/archive/index.php/t-1438052.html) where they advise to use the command `hash` on the produced executable.
I'm curious about that command, did you ever use it? For which purpose?
Whe... | `hash` isn't actually your history; it is a `bash(1)` shell built-in that maintains a hash table of recently executed programs:
> Bash uses a hash table to remember the full pathnames of executable files (see hash under SHELL BUILTIN COMMANDS below). A full search of the directories in PATH is performed only if the co... |
5933719 | Parsing an XML file with PowerShell | 7 | 2011-05-09 07:13:39 | <p>One of my application is generating below XML file.</p>
<pre><code><root>
<command name="Set">
<property name="PWR.WakeupOnLAN" value="6" errorcode="0x0"/>
</command>
<command name="Set">
</command>
<command name="biossettings">
<prope... | 1,997 | 209,355 | 2013-05-24 08:18:08 | 5,933,939 | 12 | 2011-05-09 07:38:24 | 26,396 | 2011-05-09 07:43:56 | https://stackoverflow.com/q/5933719 | https://stackoverflow.com/a/5933939 | <p>In PowerShell 2.0 you can solve this using the new <a href="http://technet.microsoft.com/en-us/library/dd347617.aspx" rel="nofollow">Select-Xml</a> cmdlet and an <a href="http://www.w3.org/TR/xpath/" rel="nofollow">XPath</a> expression:</p>
<pre><code>[xml]$document = "<root><command name='Set'><prop... | <p>In PowerShell 2.0 you can solve this using the new <a href="http://technet.microsoft.com/en-us/library/dd347617.aspx" rel="nofollow">Select-Xml</a> cmdlet and an <a href="http://www.w3.org/TR/xpath/" rel="nofollow">XPath</a> expression:</p> <pre><code>[xml]$document = "<root><command name='Set'><prop... | 1, 526, 24067 | .net, powershell, powershell-2.0 | <h1>Parsing an XML file with PowerShell</h1>
<p>One of my application is generating below XML file.</p>
<pre><code><root>
<command name="Set">
<property name="PWR.WakeupOnLAN" value="6" errorcode="0x0"/>
</command>
<command name="Set">
</command>
<comm... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,056 | bash | # Parsing an XML file with PowerShell
One of my application is generating below XML file.
```
<root>
<command name="Set">
<property name="PWR.WakeupOnLAN" value="6" errorcode="0x0"/>
</command>
<command name="Set">
</command>
<command name="biossettings">
<property name="task" valu... | In PowerShell 2.0 you can solve this using the new [Select-Xml](http://technet.microsoft.com/en-us/library/dd347617.aspx) cmdlet and an [XPath](http://www.w3.org/TR/xpath/) expression:
```
[xml]$document = "<root><command name='Set'><property name='PWR.WakeupOnLAN' value='6' errorcode='0x0'/></command><command name='S... |
4921132 | How to exit out of password mode? | 7 | 2011-02-07 12:12:13 | <p>If I Ctrl+C on a password prompt in shell (for eg during an scp or ssh), the shell is forever gone into the hidden characters (password) mode. There appears to be no way for me to start echoing the keystrokes to the display again and I have to logoff and log back in. Is there a simple way to force shell out of the p... | 17,121 | 471,371 | 2011-02-07 12:16:31 | 4,921,166 | 12 | 2011-02-07 12:16:11 | 613,064 | 2011-02-07 12:16:11 | https://stackoverflow.com/q/4921132 | https://stackoverflow.com/a/4921166 | <p>Whenever there is something wrong with the terminal, usually one of <code>reset</code> or <code>stty sane</code> will get it back to a usable state. Which it is depends on the problem at hand.</p>
| <p>Whenever there is something wrong with the terminal, usually one of <code>reset</code> or <code>stty sane</code> will get it back to a usable state. Which it is depends on the problem at hand.</p> | 34, 58, 387 | bash, linux, unix | <h1>How to exit out of password mode?</h1>
<p>If I Ctrl+C on a password prompt in shell (for eg during an scp or ssh), the shell is forever gone into the hidden characters (password) mode. There appears to be no way for me to start echoing the keystrokes to the display again and I have to logoff and log back in. Is the... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,057 | bash | # How to exit out of password mode?
If I Ctrl+C on a password prompt in shell (for eg during an scp or ssh), the shell is forever gone into the hidden characters (password) mode. There appears to be no way for me to start echoing the keystrokes to the display again and I have to logoff and log back in. Is there a simp... | Whenever there is something wrong with the terminal, usually one of `reset` or `stty sane` will get it back to a usable state. Which it is depends on the problem at hand. |
4905593 | cannot type 'e' or 'P' in MinGW/msys shells or terminals | 7 | 2011-02-05 07:02:00 | <p>I have successfully installed and used MinGW and msys in the past to compile and link Windows executables. On a fresh installation for 32-bit Vista (the same platform as when I had previous success) I am getting some maddening behavior: when I type lower-case 'e' or upper-case 'P' in the provided shell environments... | 2,187 | 65,781 | 2011-06-02 09:34:22 | 4,905,835 | 12 | 2011-02-05 08:15:18 | 26,428 | 2011-02-05 08:15:18 | https://stackoverflow.com/q/4905593 | https://stackoverflow.com/a/4905835 | <p>I'm assuming you're using Bash. It sounds to me like the key bindings have gotten messed up for some reason.</p>
<p>If you do this command:</p>
<pre><code>bind -p|grep -i '"[pE]"'
</code></pre>
<p>you should get this result:</p>
<pre><code>"E": self-insert
"e": self-insert
"P": self-insert
"p": self-insert
</cod... | <p>I'm assuming you're using Bash. It sounds to me like the key bindings have gotten messed up for some reason.</p> <p>If you do this command:</p> <pre><code>bind -p|grep -i '"[pE]"' </code></pre> <p>you should get this result:</p> <pre><code>"E": self-insert "e": self-insert "P": self-insert "p": self-insert </cod... | 390, 391, 4086, 13232 | mingw, msys, shell, terminal | <h1>cannot type 'e' or 'P' in MinGW/msys shells or terminals</h1>
<p>I have successfully installed and used MinGW and msys in the past to compile and link Windows executables. On a fresh installation for 32-bit Vista (the same platform as when I had previous success) I am getting some maddening behavior: when I type l... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,058 | bash | # cannot type 'e' or 'P' in MinGW/msys shells or terminals
I have successfully installed and used MinGW and msys in the past to compile and link Windows executables. On a fresh installation for 32-bit Vista (the same platform as when I had previous success) I am getting some maddening behavior: when I type lower-case ... | I'm assuming you're using Bash. It sounds to me like the key bindings have gotten messed up for some reason.
If you do this command:
```
bind -p|grep -i '"[pE]"'
```
you should get this result:
```
"E": self-insert
"e": self-insert
"P": self-insert
"p": self-insert
```
If the entries for "P" and "e" are missing th... |
4904225 | need help porting a sed command from debian to OSX | 7 | 2011-02-05 00:22:15 | <p>This is one for you sed gurus out there. I really don't know enough about sed to take this apart completely. It was written on some standard Linux distro and I need it to run on OSX. </p>
<pre><code>COMPILE_FILES=$(sed -nr '/<script type="text\/javascript"/ { s%^.*src="\{\$baseUrl\}/([^"]+)".*$%\1%p }' templates... | 3,043 | 215,847 | 2025-06-24 15:04:24 | 4,904,510 | 12 | 2011-02-05 01:25:54 | 26,428 | 2025-06-24 15:04:24 | https://stackoverflow.com/q/4904225 | https://stackoverflow.com/a/4904510 | <p>OS X <code>sed</code> is based on an older POSIX standard which forbade multiple sed-scripts separated by semicolons (instead of separate <code>-e</code> invocations) and requires newlines for sed-commands grouped in curly braces (which aren't necessary in the command you have). Try this:</p>
<pre><code>COMPILE_FILE... | <p>OS X <code>sed</code> is based on an older POSIX standard which forbade multiple sed-scripts separated by semicolons (instead of separate <code>-e</code> invocations) and requires newlines for sed-commands grouped in curly braces (which aren't necessary in the command you have). Try this:</p> <pre><code>COMPILE_FILE... | 369, 390, 1231, 5282 | command-line, macos, sed, shell | <h1>need help porting a sed command from debian to OSX</h1>
<p>This is one for you sed gurus out there. I really don't know enough about sed to take this apart completely. It was written on some standard Linux distro and I need it to run on OSX. </p>
<pre><code>COMPILE_FILES=$(sed -nr '/<script type="text\/javascri... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,059 | bash | # need help porting a sed command from debian to OSX
This is one for you sed gurus out there. I really don't know enough about sed to take this apart completely. It was written on some standard Linux distro and I need it to run on OSX.
```
COMPILE_FILES=$(sed -nr '/<script type="text\/javascript"/ { s%^.*src="\{\$bas... | OS X `sed` is based on an older POSIX standard which forbade multiple sed-scripts separated by semicolons (instead of separate `-e` invocations) and requires newlines for sed-commands grouped in curly braces (which aren't necessary in the command you have). Try this:
```
COMPILE_FILES=$(sed -n -E '/<script type="text\... |
4741860 | Concatenate strings and expression results in PowerShell | 7 | 2011-01-19 23:08:11 | <p>I want to write out the current process ID in PowerShell. This works:</p>
<pre><code>$processId = $([System.Diagnostics.Process]::GetCurrentProcess()).Id
Write-Output "My process ID is $processId"
</code></pre>
<p>However, I want to do it in one line, if possible. Substituting the <code>$([System.Diagnostics.Proce... | 13,821 | 20,336 | 2011-01-20 14:44:49 | 4,743,529 | 12 | 2011-01-20 04:47:03 | 25,216 | 2011-01-20 06:05:42 | https://stackoverflow.com/q/4741860 | https://stackoverflow.com/a/4743529 | <pre><code>'My process id is {0}' -f [System.Diagnostics.Process]::GetCurrentProcess().Id
</code></pre>
<p>And if we use automatic variables:</p>
<pre><code>'My process id is {0}' -f $pid
</code></pre>
| <pre><code>'My process id is {0}' -f [System.Diagnostics.Process]::GetCurrentProcess().Id </code></pre> <p>And if we use automatic variables:</p> <pre><code>'My process id is {0}' -f $pid </code></pre> | 526, 7792 | powershell, string-concatenation | <h1>Concatenate strings and expression results in PowerShell</h1>
<p>I want to write out the current process ID in PowerShell. This works:</p>
<pre><code>$processId = $([System.Diagnostics.Process]::GetCurrentProcess()).Id
Write-Output "My process ID is $processId"
</code></pre>
<p>However, I want to do it in one lin... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,060 | bash | # Concatenate strings and expression results in PowerShell
I want to write out the current process ID in PowerShell. This works:
```
$processId = $([System.Diagnostics.Process]::GetCurrentProcess()).Id
Write-Output "My process ID is $processId"
```
However, I want to do it in one line, if possible. Substituting the ... | ```
'My process id is {0}' -f [System.Diagnostics.Process]::GetCurrentProcess().Id
```
And if we use automatic variables:
```
'My process id is {0}' -f $pid
``` |
4691874 | PowerShell 2.0 and how to handle exceptions? | 7 | 2011-01-14 14:06:49 | <p>Why I get error message printed on the console when running these two simple samples ?
I want that I get "Error testing :)" printed on the console insted of:</p>
<blockquote>
<p>Get-WmiObject : The RPC server is
unavailable. (Exception from HRESULT:
0x800706BA) At line:3 char:15
+ Get-WmiObject <<... | 15,394 | 423,278 | 2011-01-14 15:10:29 | 4,692,273 | 12 | 2011-01-14 14:48:38 | 323,582 | 2011-01-14 15:10:29 | https://stackoverflow.com/q/4691874 | https://stackoverflow.com/a/4692273 | <p><strong>First example</strong></p>
<p>The error happens at compile/parsing time (PowerShell is clever enough), so that the code is not even executed and it cannot catch anything, indeed. Try this code instead and you will catch an exception:</p>
<pre><code>try
{
$x = 0
$i = 1/$x
Write-Host $i
}
catch [... | <p><strong>First example</strong></p> <p>The error happens at compile/parsing time (PowerShell is clever enough), so that the code is not even executed and it cannot catch anything, indeed. Try this code instead and you will catch an exception:</p> <pre><code>try { $x = 0 $i = 1/$x Write-Host $i } catch [... | 526, 5142, 24067 | exception, powershell, powershell-2.0 | <h1>PowerShell 2.0 and how to handle exceptions?</h1>
<p>Why I get error message printed on the console when running these two simple samples ?
I want that I get "Error testing :)" printed on the console insted of:</p>
<blockquote>
<p>Get-WmiObject : The RPC server is
unavailable. (Exception from HRESULT:
0x800... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,061 | bash | # PowerShell 2.0 and how to handle exceptions?
Why I get error message printed on the console when running these two simple samples ?
I want that I get "Error testing :)" printed on the console insted of:
> Get-WmiObject : The RPC server is
> unavailable. (Exception from HRESULT:
> 0x800706BA) At line:3 char:15
> + G... | **First example**
The error happens at compile/parsing time (PowerShell is clever enough), so that the code is not even executed and it cannot catch anything, indeed. Try this code instead and you will catch an exception:
```
try
{
$x = 0
$i = 1/$x
Write-Host $i
}
catch [Exception]
{
Write-Host "Error... |
4673830 | Random number between range in shell | 7 | 2011-01-12 20:43:55 | <p>How I can generate random number between 0-60 in sh (/bin/sh, not bash)? This is a satellite box, there is no <code>$RANDOM</code> variable, and other goods [cksum, od (od -vAn -N4 -tu4 < /dev/urandom)].</p>
<p>I want to randomize a crontab job's time.</p>
| 19,187 | 573,334 | 2025-07-11 13:38:58 | 4,674,128 | 12 | 2011-01-12 21:11:45 | 115,405 | 2011-01-12 21:11:45 | https://stackoverflow.com/q/4673830 | https://stackoverflow.com/a/4674128 | <p>If you have tr, head and /dev/urandom, you can write this:</p>
<pre><code>tr -cd 0-9 </dev/urandom | head -c 3
</code></pre>
<p>Then you have to use the remainder operator to put in 0-60 range.</p>
| <p>If you have tr, head and /dev/urandom, you can write this:</p> <pre><code>tr -cd 0-9 </dev/urandom | head -c 3 </code></pre> <p>Then you have to use the remainder operator to put in 0-60 range.</p> | 58, 197, 390 | linux, random, shell | <h1>Random number between range in shell</h1>
<p>How I can generate random number between 0-60 in sh (/bin/sh, not bash)? This is a satellite box, there is no <code>$RANDOM</code> variable, and other goods [cksum, od (od -vAn -N4 -tu4 < /dev/urandom)].</p>
<p>I want to randomize a crontab job's time.</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,062 | bash | # Random number between range in shell
How I can generate random number between 0-60 in sh (/bin/sh, not bash)? This is a satellite box, there is no `$RANDOM` variable, and other goods [cksum, od (od -vAn -N4 -tu4 < /dev/urandom)].
I want to randomize a crontab job's time. | If you have tr, head and /dev/urandom, you can write this:
```
tr -cd 0-9 </dev/urandom | head -c 3
```
Then you have to use the remainder operator to put in 0-60 range. |
3395374 | Run/invoke windows batch script from sh or bash script | 7 | 2010-08-03 09:53:49 | <p>I have a sh/bash script that needs to call a batch file with parameters (parameters are file names and are given in DOS/Windows format).</p>
<p>Basically I have:
<strong>script.sh</strong></p>
<pre><code>#!/bin/sh
declare var1=$1
declare var2=$2
dosomething var1 var2
...
<invoke batch script> var1 var2
...
d... | 6,546 | 23,795 | 2013-09-23 16:05:29 | 3,395,576 | 12 | 2010-08-03 10:21:04 | 23,795 | 2010-08-03 10:21:04 | https://stackoverflow.com/q/3395374 | https://stackoverflow.com/a/3395576 | <p>It seems that I needed to escape the space from the cmd param:</p>
<pre><code>$COMSPEC \/c batch-file\ \"$var1\"\ \"$var2\"
</code></pre>
<p>or</p>
<pre><code>$COMSPEC /c batch-file\ \"$var1\"\ \"$var2\"
</code></pre>
<p>I'm not sure whether the / from /c needs to be escaped, but it works fine both ways escaped.... | <p>It seems that I needed to escape the space from the cmd param:</p> <pre><code>$COMSPEC \/c batch-file\ \"$var1\"\ \"$var2\" </code></pre> <p>or</p> <pre><code>$COMSPEC /c batch-file\ \"$var1\"\ \"$var2\" </code></pre> <p>I'm not sure whether the / from /c needs to be escaped, but it works fine both ways escaped.... | 387, 2631, 7002, 21628 | bash, batch-file, cmd, msysgit | <h1>Run/invoke windows batch script from sh or bash script</h1>
<p>I have a sh/bash script that needs to call a batch file with parameters (parameters are file names and are given in DOS/Windows format).</p>
<p>Basically I have:
<strong>script.sh</strong></p>
<pre><code>#!/bin/sh
declare var1=$1
declare var2=$2
dosom... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,063 | bash | # Run/invoke windows batch script from sh or bash script
I have a sh/bash script that needs to call a batch file with parameters (parameters are file names and are given in DOS/Windows format).
Basically I have:
**script.sh**
```
#!/bin/sh
declare var1=$1
declare var2=$2
dosomething var1 var2
...
<invoke batch scrip... | It seems that I needed to escape the space from the cmd param:
```
$COMSPEC \/c batch-file\ \"$var1\"\ \"$var2\"
```
or
```
$COMSPEC /c batch-file\ \"$var1\"\ \"$var2\"
```
I'm not sure whether the / from /c needs to be escaped, but it works fine both ways escaped. |
2689537 | Use the output of a command as input of the next command | 7 | 2010-04-22 09:19:28 | <p>So I call this PHP script from the command line:</p>
<pre><code>/usr/bin/php /var/www/bims/index.php "projects/output"
</code></pre>
<p>and its output is:</p>
<pre><code>file1 file2 file3
</code></pre>
<p>What I would like to do is get this output and feed to the "rm" command but I think im not doing it right:</... | 12,479 | 258,219 | 2023-12-14 12:59:51 | 2,689,573 | 12 | 2010-04-22 09:24:22 | 162,634 | 2010-04-22 09:24:22 | https://stackoverflow.com/q/2689537 | https://stackoverflow.com/a/2689573 | <pre><code>/usr/bin/php /var/www/bims/index.php "projects/output" | xargs rm
</code></pre>
| <pre><code>/usr/bin/php /var/www/bims/index.php "projects/output" | xargs rm </code></pre> | 58, 387 | bash, linux | <h1>Use the output of a command as input of the next command</h1>
<p>So I call this PHP script from the command line:</p>
<pre><code>/usr/bin/php /var/www/bims/index.php "projects/output"
</code></pre>
<p>and its output is:</p>
<pre><code>file1 file2 file3
</code></pre>
<p>What I would like to do is get this output... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,064 | bash | # Use the output of a command as input of the next command
So I call this PHP script from the command line:
```
/usr/bin/php /var/www/bims/index.php "projects/output"
```
and its output is:
```
file1 file2 file3
```
What I would like to do is get this output and feed to the "rm" command but I think im not doing it... | ```
/usr/bin/php /var/www/bims/index.php "projects/output" | xargs rm
``` |
2373561 | Listing files and directories writable by the group in Linux | 7 | 2010-03-03 17:39:36 | <p>What's the easiest way to recursively list files in a given directory and its subdirectories, that are writable by the group which owns them? I'm using Debian 5.</p>
| 8,647 | 226,640 | 2010-03-03 17:51:39 | 2,373,607 | 12 | 2010-03-03 17:45:55 | 180,736 | 2010-03-03 17:51:39 | https://stackoverflow.com/q/2373561 | https://stackoverflow.com/a/2373607 | <p>Something like</p>
<pre><code>find /dir/ -perm /g=w
</code></pre>
<p>Or, for output like ls -l</p>
<pre><code>find /dir/ -perm /g=w -exec ls -lLd {} +
</code></pre>
| <p>Something like</p> <pre><code>find /dir/ -perm /g=w </code></pre> <p>Or, for output like ls -l</p> <pre><code>find /dir/ -perm /g=w -exec ls -lLd {} + </code></pre> | 58, 387, 1012, 10631 | bash, console-application, debian, linux | <h1>Listing files and directories writable by the group in Linux</h1>
<p>What's the easiest way to recursively list files in a given directory and its subdirectories, that are writable by the group which owns them? I'm using Debian 5.</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,065 | bash | # Listing files and directories writable by the group in Linux
What's the easiest way to recursively list files in a given directory and its subdirectories, that are writable by the group which owns them? I'm using Debian 5. | Something like
```
find /dir/ -perm /g=w
```
Or, for output like ls -l
```
find /dir/ -perm /g=w -exec ls -lLd {} +
``` |
2021345 | How do I execute (not import) a python script from a python prompt? | 7 | 2010-01-07 15:25:15 | <p>I need to execute a Python script from an already started Python session, as if it were launched from the command line. I'm thinking of similar to doing <code>source</code> in bash or sh.</p>
| 6,788 | 106,979 | 2015-09-22 01:52:25 | 2,021,400 | 12 | 2010-01-07 15:32:12 | 94,977 | 2015-09-22 01:52:25 | https://stackoverflow.com/q/2021345 | https://stackoverflow.com/a/2021400 | <p>In Python 2, the builtin function <a href="http://docs.python.org/library/functions.html#execfile" rel="nofollow noreferrer"><code>execfile</code></a> does this.</p>
<pre><code>execfile(filename)
</code></pre>
| <p>In Python 2, the builtin function <a href="http://docs.python.org/library/functions.html#execfile" rel="nofollow noreferrer"><code>execfile</code></a> does this.</p> <pre><code>execfile(filename) </code></pre> | 16, 387, 432, 3849 | bash, import, module, python | <h1>How do I execute (not import) a python script from a python prompt?</h1>
<p>I need to execute a Python script from an already started Python session, as if it were launched from the command line. I'm thinking of similar to doing <code>source</code> in bash or sh.</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,066 | bash | # How do I execute (not import) a python script from a python prompt?
I need to execute a Python script from an already started Python session, as if it were launched from the command line. I'm thinking of similar to doing `source` in bash or sh. | In Python 2, the builtin function [`execfile`](http://docs.python.org/library/functions.html#execfile) does this.
```
execfile(filename)
``` |
1817562 | Execute a shell command from a .NET application | 7 | 2009-11-30 02:11:30 | <p>I need to execute a shell command from my .NET application, not unlike <a href="http://lua-users.org/wiki/OsLibraryTutorial" rel="nofollow noreferrer"><code>os.execute</code></a> (a little way down on that page) in <a href="http://en.wikipedia.org/wiki/Lua_%28programming_language%29" rel="nofollow noreferrer">Lua</a... | 15,361 | 117,069 | 2015-08-30 19:46:35 | 1,817,573 | 12 | 2009-11-30 02:15:15 | 221,042 | 2015-08-30 19:46:35 | https://stackoverflow.com/q/1817562 | https://stackoverflow.com/a/1817573 | <pre><code>System.Diagnostics.Process p = new System.Diagnostics.Process();
p.StartInfo.FileName = "blah.lua arg1 arg2 arg3";
p.StartInfo.UseShellExecute = true;
p.Start();
</code></pre>
<p>Another way would be to use <a href="http://en.wikipedia.org/wiki/Platform_Invocation_Services" rel="nofollow noreferrer">P/Invok... | <pre><code>System.Diagnostics.Process p = new System.Diagnostics.Process(); p.StartInfo.FileName = "blah.lua arg1 arg2 arg3"; p.StartInfo.UseShellExecute = true; p.Start(); </code></pre> <p>Another way would be to use <a href="http://en.wikipedia.org/wiki/Platform_Invocation_Services" rel="nofollow noreferrer">P/Invok... | 1, 390, 488, 11844, 36252 | .net, console, execution, shell, winforms | <h1>Execute a shell command from a .NET application</h1>
<p>I need to execute a shell command from my .NET application, not unlike <a href="http://lua-users.org/wiki/OsLibraryTutorial" rel="nofollow noreferrer"><code>os.execute</code></a> (a little way down on that page) in <a href="http://en.wikipedia.org/wiki/Lua_%28... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,067 | bash | # Execute a shell command from a .NET application
I need to execute a shell command from my .NET application, not unlike [`os.execute`](http://lua-users.org/wiki/OsLibraryTutorial) (a little way down on that page) in [Lua](http://en.wikipedia.org/wiki/Lua_%28programming_language%29). However with a cursory search I co... | ```
System.Diagnostics.Process p = new System.Diagnostics.Process();
p.StartInfo.FileName = "blah.lua arg1 arg2 arg3";
p.StartInfo.UseShellExecute = true;
p.Start();
```
Another way would be to use [P/Invoke](http://en.wikipedia.org/wiki/Platform_Invocation_Services) and use ShellExecute directly:
```
[DllImport("she... |
1334298 | Running a script from Groovy | 7 | 2009-08-26 12:21:41 | <p>In order to get my setup a bit closer to "one click deployment", I would like to use groovy scripts to start/stop other processes controlled by bat scripts, running in different parts of the filesystem and even on different machines. </p>
<p>How to execute these scripts and how to do it from <em>their</em> respecti... | 19,708 | 132,396 | 2012-12-12 20:21:04 | 1,334,625 | 12 | 2009-08-26 13:18:15 | 12,591 | 2009-08-26 13:18:15 | https://stackoverflow.com/q/1334298 | https://stackoverflow.com/a/1334625 | <p>Groovy added an execute() method to plain old String, so try this:</p>
<pre><code>println "ls -la".execute().text
</code></pre>
| <p>Groovy added an execute() method to plain old String, so try this:</p> <pre><code>println "ls -la".execute().text </code></pre> | 531, 849, 3951 | groovy, groovyshell, scripting | <h1>Running a script from Groovy</h1>
<p>In order to get my setup a bit closer to "one click deployment", I would like to use groovy scripts to start/stop other processes controlled by bat scripts, running in different parts of the filesystem and even on different machines. </p>
<p>How to execute these scripts and how... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,068 | bash | # Running a script from Groovy
In order to get my setup a bit closer to "one click deployment", I would like to use groovy scripts to start/stop other processes controlled by bat scripts, running in different parts of the filesystem and even on different machines.
How to execute these scripts and how to do it from *t... | Groovy added an execute() method to plain old String, so try this:
```
println "ls -la".execute().text
``` |
967369 | python: find out if running in shell or not (e.g. sun grid engine queue) | 7 | 2009-06-08 22:36:56 | <p>is there a way to find out from within a python program if it was started in a terminal or e.g. in a batch engine like sun grid engine?</p>
<p>the idea is to decide on printing some progress bars and other ascii-interactive stuff, or not.</p>
<p>thanks!</p>
<p>p.</p>
| 1,825 | null | 2013-07-20 00:27:32 | 967,384 | 12 | 2009-06-08 22:39:50 | 82,294 | 2013-01-28 04:07:59 | https://stackoverflow.com/q/967369 | https://stackoverflow.com/a/967384 | <p>The standard way is <code>isatty()</code>.</p>
<pre><code>import sys
if sys.stdout.isatty():
print("Interactive")
else:
print("Non-interactive")
</code></pre>
| <p>The standard way is <code>isatty()</code>.</p> <pre><code>import sys if sys.stdout.isatty(): print("Interactive") else: print("Non-interactive") </code></pre> | 16, 390, 391, 4867 | python, shell, stdout, terminal | <h1>python: find out if running in shell or not (e.g. sun grid engine queue)</h1>
<p>is there a way to find out from within a python program if it was started in a terminal or e.g. in a batch engine like sun grid engine?</p>
<p>the idea is to decide on printing some progress bars and other ascii-interactive stuff, or ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,069 | bash | # python: find out if running in shell or not (e.g. sun grid engine queue)
is there a way to find out from within a python program if it was started in a terminal or e.g. in a batch engine like sun grid engine?
the idea is to decide on printing some progress bars and other ascii-interactive stuff, or not.
thanks!
p... | The standard way is `isatty()`.
```
import sys
if sys.stdout.isatty():
print("Interactive")
else:
print("Non-interactive")
``` |
330608 | Changing IIS6 Site Home Directory with Powershell | 7 | 2008-12-01 11:57:29 | <p>I'm trying to change a site's home directory using powershell. This is what I have so far, but it isn't saving the changes...</p>
<pre><code>$server = "localhost"
$siteName = "mysite"
$iis = [ADSI]"IIS://$server/W3SVC"
$site = $iis.psbase.children | where { $_.keyType -eq "IIsWebServer"
-AND $_.ServerComme... | 4,156 | 23,393 | 2015-11-01 21:28:12 | 330,842 | 12 | 2008-12-01 13:32:05 | 23,393 | 2008-12-01 13:32:05 | https://stackoverflow.com/q/330608 | https://stackoverflow.com/a/330842 | <pre><code>$server = "localhost"
$siteName = "mysite"
$iis = [ADSI]"IIS://$server/W3SVC"
$site = $iis.psbase.children | where { $_.keyType -eq "IIsWebServer"
-AND $_.ServerComment -eq $siteName }
$path = [adsi]($site.psbase.path+"/ROOT")
$path.path
$path.psbase.properties.path[0] = "D:\Sites\$siteName\www2"
$p... | <pre><code>$server = "localhost" $siteName = "mysite" $iis = [ADSI]"IIS://$server/W3SVC" $site = $iis.psbase.children | where { $_.keyType -eq "IIsWebServer" -AND $_.ServerComment -eq $siteName } $path = [adsi]($site.psbase.path+"/ROOT") $path.path $path.psbase.properties.path[0] = "D:\Sites\$siteName\www2" $p... | 215, 526, 531, 2304 | iis, iis-6, powershell, scripting | <h1>Changing IIS6 Site Home Directory with Powershell</h1>
<p>I'm trying to change a site's home directory using powershell. This is what I have so far, but it isn't saving the changes...</p>
<pre><code>$server = "localhost"
$siteName = "mysite"
$iis = [ADSI]"IIS://$server/W3SVC"
$site = $iis.psbase.children | where {... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,070 | bash | # Changing IIS6 Site Home Directory with Powershell
I'm trying to change a site's home directory using powershell. This is what I have so far, but it isn't saving the changes...
```
$server = "localhost"
$siteName = "mysite"
$iis = [ADSI]"IIS://$server/W3SVC"
$site = $iis.psbase.children | where { $_.keyType -eq "IIs... | ```
$server = "localhost"
$siteName = "mysite"
$iis = [ADSI]"IIS://$server/W3SVC"
$site = $iis.psbase.children | where { $_.keyType -eq "IIsWebServer"
-AND $_.ServerComment -eq $siteName }
$path = [adsi]($site.psbase.path+"/ROOT")
$path.path
$path.psbase.properties.path[0] = "D:\Sites\$siteName\www2"
$path.pat... |
73034137 | in bash what does the -n parameter in "local -n" mean? | 6 | 2022-07-19 09:04:24 | <p>in bash what does the -n parameter in <code>local -n var...</code> mean? - how does it differ from <code>local var...</code></p>
<p>I can't find a good example / explanation for it. There are no man pages for keywords (it seems?). The closest I have found is a comment here: <a href="https://stackoverflow.com/questio... | 5,590 | 2,298,137 | 2022-12-13 07:46:14 | 73,034,276 | 12 | 2022-07-19 09:14:10 | 1,030,675 | 2022-07-19 09:14:10 | https://stackoverflow.com/q/73034137 | https://stackoverflow.com/a/73034276 | <p>Parameters to <code>local</code> are unfortunately not documented in <code>help local</code>, but in <code>help declare</code>:</p>
<blockquote>
<pre><code> `-n` make NAME a reference to the variable named by its value
</code></pre>
</blockquote>
<p>How does it work?</p>
<pre class="lang-bash prettyprint-override"><... | <p>Parameters to <code>local</code> are unfortunately not documented in <code>help local</code>, but in <code>help declare</code>:</p> <blockquote> <pre><code> `-n` make NAME a reference to the variable named by its value </code></pre> </blockquote> <p>How does it work?</p> <pre class="lang-bash prettyprint-override"><... | 58, 387, 6923 | bash, linux, local | <h1>in bash what does the -n parameter in "local -n" mean?</h1>
<p>in bash what does the -n parameter in <code>local -n var...</code> mean? - how does it differ from <code>local var...</code></p>
<p>I can't find a good example / explanation for it. There are no man pages for keywords (it seems?). The closest I have fou... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,071 | bash | # in bash what does the -n parameter in "local -n" mean?
in bash what does the -n parameter in `local -n var...` mean? - how does it differ from `local var...`
I can't find a good example / explanation for it. There are no man pages for keywords (it seems?). The closest I have found is a comment here: [local: -n: inv... | Parameters to `local` are unfortunately not documented in `help local`, but in `help declare`:
> ```
> `-n` make NAME a reference to the variable named by its value
> ```
How does it work?
```
#! /bin/bash
f () {
local -n x=y
y=12
x=42
echo $x $y # 42 42
}
f
```
You can achieve similar behaviour w... |
72104301 | PowerShell Open URL in New Window - [system.Diagnostics.process]::Start("","") | 6 | 2022-05-03 19:05:26 | <p>So I'm using PowerShell (specifically version 5.1) in order to write a script for my work that essentially opens some websites depending on what the user selects from available options.</p>
<p>In order to open the website (for this example, let's just say I'm going to Google), I'm using [system.Diagnostics.Process]:... | 23,224 | 19,026,975 | 2025-05-20 22:31:16 | 72,104,697 | 12 | 2022-05-03 19:43:27 | 45,375 | 2023-05-07 20:31:23 | https://stackoverflow.com/q/72104301 | https://stackoverflow.com/a/72104697 |
<ul>
<li><p>The Chrome CLI parameter that requests opening a given URL in a new window is <br><code>--new-window</code></p>
</li>
<li><p>It's simpler to use PowerShell's <a href="https://learn.microsoft.com/powershell/module/microsoft.powershell.management/start-process" rel="noreferrer"><code>Start-Process</code></a>... | <ul> <li><p>The Chrome CLI parameter that requests opening a given URL in a new window is <br><code>--new-window</code></p> </li> <li><p>It's simpler to use PowerShell's <a href="https://learn.microsoft.com/powershell/module/microsoft.powershell.management/start-process" rel="noreferrer"><code>Start-Process</code></a>... | 526 | powershell | <h1>PowerShell Open URL in New Window - [system.Diagnostics.process]::Start("","")</h1>
<p>So I'm using PowerShell (specifically version 5.1) in order to write a script for my work that essentially opens some websites depending on what the user selects from available options.</p>
<p>In order to open the website (for th... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,072 | bash | # PowerShell Open URL in New Window - [system.Diagnostics.process]::Start("","")
So I'm using PowerShell (specifically version 5.1) in order to write a script for my work that essentially opens some websites depending on what the user selects from available options.
In order to open the website (for this example, let... | - The Chrome CLI parameter that requests opening a given URL in a new window is
`--new-window`
- It's simpler to use PowerShell's [`Start-Process`](https://learn.microsoft.com/powershell/module/microsoft.powershell.management/start-process) cmdlet rather than the underlying .NET API directly.
Therefore:
```
Star... |
68907012 | How to open installed Microsoft Store apps from powershell? | 6 | 2021-08-24 11:47:07 | <p>I'm getting the list of installed Microsoft Store apps with this command:</p>
<pre><code>Get-AppxPackage -AllUsers
</code></pre>
<p>And then I try to open an app:</p>
<pre><code>powershell -Command "Start-Process 'C:\Program Files\WindowsApps\Microsoft.Windows.Photos_2021.21070.22007.0_x64__8wekyb3d8bbwe\Micros... | 7,132 | 12,125,881 | 2022-09-13 16:50:32 | 68,907,604 | 12 | 2021-08-24 12:28:59 | 45,375 | 2022-09-13 16:50:32 | https://stackoverflow.com/q/68907012 | https://stackoverflow.com/a/68907604 |
<pre class="lang-bash prettyprint-override"><code># Use the URI scheme of the Microsoft.Photos application.
# Note: Unfortunately, -Wait does *not* work in this case.
Start-Process ms-photos:
# Wait for the process to exit (from what I can tell there's only ever 1
# Microsoft.Photos process).
# The relevant process n... | <pre class="lang-bash prettyprint-override"><code># Use the URI scheme of the Microsoft.Photos application. # Note: Unfortunately, -Wait does *not* work in this case. Start-Process ms-photos: # Wait for the process to exit (from what I can tell there's only ever 1 # Microsoft.Photos process). # The relevant process n... | 64, 526, 84376 | appx, powershell, windows | <h1>How to open installed Microsoft Store apps from powershell?</h1>
<p>I'm getting the list of installed Microsoft Store apps with this command:</p>
<pre><code>Get-AppxPackage -AllUsers
</code></pre>
<p>And then I try to open an app:</p>
<pre><code>powershell -Command "Start-Process 'C:\Program Files\WindowsApps\... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,073 | bash | # How to open installed Microsoft Store apps from powershell?
I'm getting the list of installed Microsoft Store apps with this command:
```
Get-AppxPackage -AllUsers
```
And then I try to open an app:
```
powershell -Command "Start-Process 'C:\Program Files\WindowsApps\Microsoft.Windows.Photos_2021.21070.22007.0_x6... | ```
# Use the URI scheme of the Microsoft.Photos application.
# Note: Unfortunately, -Wait does *not* work in this case.
Start-Process ms-photos:
# Wait for the process to exit (from what I can tell there's only ever 1
# Microsoft.Photos process).
# The relevant process name was obtained with: Get-Process *Photos*
(Ge... |
67626879 | [System.Collections.Generic.List[string]] as return value | 6 | 2021-05-20 19:31:45 | <p>I have a need/want to return a <code>[System.Collections.Generic.List[string]]</code> from a function, but it is being covered into a <code>System.Object[]</code></p>
<p>I have this</p>
<pre><code>function TestReturn {
$returnList = New-Object System.Collections.Generic.List[string]
$returnList.Add('Testing,... | 19,950 | 4,552,490 | 2025-02-12 12:50:45 | 67,627,137 | 12 | 2021-05-20 19:55:28 | 4,749,264 | 2021-05-20 19:55:28 | https://stackoverflow.com/q/67626879 | https://stackoverflow.com/a/67627137 | <p>If you remove the array subexpression <code>@(...)</code> and just precede with a comma. The below code seems to work:</p>
<pre><code>function TestReturn {
$returnList = New-Object System.Collections.Generic.List[string]
$returnList.Add('Testing, one, two')
return , $returnList
}
$testList = TestRetur... | <p>If you remove the array subexpression <code>@(...)</code> and just precede with a comma. The below code seems to work:</p> <pre><code>function TestReturn { $returnList = New-Object System.Collections.Generic.List[string] $returnList.Add('Testing, one, two') return , $returnList } $testList = TestRetur... | 526, 8799, 9643 | generic-list, powershell, return-type | <h1>[System.Collections.Generic.List[string]] as return value</h1>
<p>I have a need/want to return a <code>[System.Collections.Generic.List[string]]</code> from a function, but it is being covered into a <code>System.Object[]</code></p>
<p>I have this</p>
<pre><code>function TestReturn {
$returnList = New-Object Sy... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 11,074 | bash | # [System.Collections.Generic.List[string]] as return value
I have a need/want to return a `[System.Collections.Generic.List[string]]` from a function, but it is being covered into a `System.Object[]`
I have this
```
function TestReturn {
$returnList = New-Object System.Collections.Generic.List[string]
$retu... | If you remove the array subexpression `@(...)` and just precede with a comma. The below code seems to work:
```
function TestReturn {
$returnList = New-Object System.Collections.Generic.List[string]
$returnList.Add('Testing, one, two')
return , $returnList
}
$testList = TestReturn
$testList.GetType().Ful... |
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