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36921658 | Save command output on variable and check exit status | 28 | 2016-04-28 17:31:01 | <p>The following command will resolve google ip</p>
<pre><code>> ip=`dig +short google.com`
> echo $ip
> 216.58.210.238
</code></pre>
<p>Sometimes (especially when internet connection is lost) this command fail with this error</p>
<pre><code>> ;; connection timed out; no servers could be reached
</code></pr... | 28,244 | 4,849,973 | 2021-05-31 09:57:45 | 36,921,714 | 13 | 2016-04-28 17:33:40 | 1,620,779 | 2021-05-31 09:57:03 | https://stackoverflow.com/q/36921658 | https://stackoverflow.com/a/36921714 | <p>You should use <code>$?</code> instead of <code>$#</code>.</p>
<ul>
<li><strong>$?</strong> contains the return value from the last script.</li>
<li><strong>$#</strong> contains the total number of arguments passed to a script or function.</li>
</ul>
<p>Do something like below :</p>
<pre><code>ip=$(dig +short googl... | <p>You should use <code>$?</code> instead of <code>$#</code>.</p> <ul> <li><strong>$?</strong> contains the return value from the last script.</li> <li><strong>$#</strong> contains the total number of arguments passed to a script or function.</li> </ul> <p>Do something like below :</p> <pre><code>ip=$(dig +short googl... | 387 | bash | <h1>Save command output on variable and check exit status</h1>
<p>The following command will resolve google ip</p>
<pre><code>> ip=`dig +short google.com`
> echo $ip
> 216.58.210.238
</code></pre>
<p>Sometimes (especially when internet connection is lost) this command fail with this error</p>
<pre><code>> ;... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,068 | bash | # Save command output on variable and check exit status
The following command will resolve google ip
```
> ip=`dig +short google.com`
> echo $ip
> 216.58.210.238
```
Sometimes (especially when internet connection is lost) this command fail with this error
```
> ;; connection timed out; no servers could be reached
`... | You should use `$?` instead of `$#`.
- **$?** contains the return value from the last script.
- **$#** contains the total number of arguments passed to a script or function.
Do something like below :
```
ip=$(dig +short google.com)
if [ $? -eq 0 ]; then
echo "Success" # Do something here
else
echo "Fail" # Fallb... |
26292078 | How to grep for lines which contain particular words in a log file? | 27 | 2014-10-10 04:42:22 | <p>I have a big log file which I am trying to scan it for a particular words. In general, I will have few words which I need to grep on my big log file and print out the line which contains those words.</p>
<p>I know how to do simple grep on a file. Suppose if my file name is <code>abc.log</code> and I need to find a ... | 140,391 | 2,809,564 | 2018-06-11 20:43:05 | 26,292,103 | 13 | 2014-10-10 04:44:37 | 1,405,588 | 2018-06-11 20:43:05 | https://stackoverflow.com/q/26292078 | https://stackoverflow.com/a/26292103 | <p>If you store your patterns in a file, one per line, you can use <code>grep -f file-with-patterns file-to-search.log</code></p>
<p>From the man page:</p>
<pre><code> -f FILE, --file=FILE
Obtain patterns from FILE, one per line. The empty file
contains zero patterns, and therefore matc... | <p>If you store your patterns in a file, one per line, you can use <code>grep -f file-with-patterns file-to-search.log</code></p> <p>From the man page:</p> <pre><code> -f FILE, --file=FILE Obtain patterns from FILE, one per line. The empty file contains zero patterns, and therefore matc... | 58, 387, 390, 1271 | bash, grep, linux, shell | <h1>How to grep for lines which contain particular words in a log file?</h1>
<p>I have a big log file which I am trying to scan it for a particular words. In general, I will have few words which I need to grep on my big log file and print out the line which contains those words.</p>
<p>I know how to do simple grep on ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,069 | bash | # How to grep for lines which contain particular words in a log file?
I have a big log file which I am trying to scan it for a particular words. In general, I will have few words which I need to grep on my big log file and print out the line which contains those words.
I know how to do simple grep on a file. Suppose ... | If you store your patterns in a file, one per line, you can use `grep -f file-with-patterns file-to-search.log`
From the man page:
```
-f FILE, --file=FILE
Obtain patterns from FILE, one per line. The empty file
contains zero patterns, and therefore matches nothing. (-f is
... |
6065446 | Executing a shell command from Common Lisp | 27 | 2011-05-19 22:16:25 | <p>How can i execute a shell (bash) command within a Common Lisp program and assign the output to a variable?</p>
| 21,151 | 481,863 | 2019-01-18 20:32:58 | 6,066,206 | 13 | 2011-05-20 00:09:55 | 428,988 | 2011-05-20 00:09:55 | https://stackoverflow.com/q/6065446 | https://stackoverflow.com/a/6066206 | <p><strong><a href="http://common-lisp.net/project/asdf/" rel="noreferrer">ASDF</a> provides a <code>RUN-SHELL-COMMAND</code> that works with many Common Lisp implementations</strong> including ABCL, Allegro CL, CLISP, Clozure CL, ECL, GCL, LispWorks, SBCL, CMU, XCL and SCL.</p>
<p>It takes a control string and a list... | <p><strong><a href="http://common-lisp.net/project/asdf/" rel="noreferrer">ASDF</a> provides a <code>RUN-SHELL-COMMAND</code> that works with many Common Lisp implementations</strong> including ABCL, Allegro CL, CLISP, Clozure CL, ECL, GCL, LispWorks, SBCL, CMU, XCL and SCL.</p> <p>It takes a control string and a list... | 14, 387, 390, 7610, 7932 | bash, common-lisp, exec, lisp, shell | <h1>Executing a shell command from Common Lisp</h1>
<p>How can i execute a shell (bash) command within a Common Lisp program and assign the output to a variable?</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,070 | bash | # Executing a shell command from Common Lisp
How can i execute a shell (bash) command within a Common Lisp program and assign the output to a variable? | **[ASDF](http://common-lisp.net/project/asdf/) provides a `RUN-SHELL-COMMAND` that works with many Common Lisp implementations** including ABCL, Allegro CL, CLISP, Clozure CL, ECL, GCL, LispWorks, SBCL, CMU, XCL and SCL.
It takes a control string and a list of arguments like `FORMAT`, and synchronously executes the re... |
4384814 | How to call batch script from Powershell? | 26 | 2010-12-08 06:38:29 | <p>I have one big batch script which sets bunch of environment variables.
I want to call that batch script from powershell, that way I can get benefits of both i.e. enviorment variable set by my script and powershell.</p>
| 44,509 | 2,302,649 | 2021-11-15 00:58:26 | 4,385,011 | 13 | 2010-12-08 07:11:54 | 323,582 | 2015-05-18 11:06:49 | https://stackoverflow.com/q/4384814 | https://stackoverflow.com/a/4385011 | <p>The idea comes from this blog post: <a href="http://www.leeholmes.com/blog/2006/05/11/nothing-solves-everything-%e2%80%93-powershell-and-other-technologies/" rel="noreferrer">Nothing solves everything – PowerShell and other technologies</a></p>
<p>Here is my version of this script. It calls a batch file (or any <em... | <p>The idea comes from this blog post: <a href="http://www.leeholmes.com/blog/2006/05/11/nothing-solves-everything-%e2%80%93-powershell-and-other-technologies/" rel="noreferrer">Nothing solves everything – PowerShell and other technologies</a></p> <p>Here is my version of this script. It calls a batch file (or any <em... | 526, 7002 | batch-file, powershell | <h1>How to call batch script from Powershell?</h1>
<p>I have one big batch script which sets bunch of environment variables.
I want to call that batch script from powershell, that way I can get benefits of both i.e. enviorment variable set by my script and powershell.</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,071 | bash | # How to call batch script from Powershell?
I have one big batch script which sets bunch of environment variables.
I want to call that batch script from powershell, that way I can get benefits of both i.e. enviorment variable set by my script and powershell. | The idea comes from this blog post: [Nothing solves everything – PowerShell and other technologies](http://www.leeholmes.com/blog/2006/05/11/nothing-solves-everything-%e2%80%93-powershell-and-other-technologies/)
Here is my version of this script. It calls a batch file (or any *native* command) and propagates its envi... |
4351282 | How to generate a sequence of dates given starting and ending dates using AWK of BASH scripts? | 26 | 2010-12-04 00:58:33 | <p>I have a data set with the following format</p>
<p>The first and second fields denote the dates (M/D/YYYY) of starting and ending of a study. </p>
<p>How one expand the data into the desired output format, taking into account the leap years using AWK or BASH scripts?</p>
<p>Your help is very much appreciated.</p... | 24,766 | 488,655 | 2021-01-02 16:41:22 | 4,351,613 | 13 | 2010-12-04 02:32:16 | 26,428 | 2017-10-16 22:02:52 | https://stackoverflow.com/q/4351282 | https://stackoverflow.com/a/4351613 | <p>If you have <code>gawk</code>:</p>
<pre><code>#!/usr/bin/gawk -f
{
split($1,s,"/")
split($2,e,"/")
st=mktime(s[3] " " s[1] " " s[2] " 0 0 0")
et=mktime(e[3] " " e[1] " " e[2] " 0 0 0")
for (i=et;i>=st;i-=60*60*24) print strftime("%m/%d/%Y",i)
}
</code></pre>
<p>Demonstration:</p>
<pre><code... | <p>If you have <code>gawk</code>:</p> <pre><code>#!/usr/bin/gawk -f { split($1,s,"/") split($2,e,"/") st=mktime(s[3] " " s[1] " " s[2] " 0 0 0") et=mktime(e[3] " " e[1] " " e[2] " 0 0 0") for (i=et;i>=st;i-=60*60*24) print strftime("%m/%d/%Y",i) } </code></pre> <p>Demonstration:</p> <pre><code... | 34, 387, 990 | awk, bash, unix | <h1>How to generate a sequence of dates given starting and ending dates using AWK of BASH scripts?</h1>
<p>I have a data set with the following format</p>
<p>The first and second fields denote the dates (M/D/YYYY) of starting and ending of a study. </p>
<p>How one expand the data into the desired output format, taki... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,072 | bash | # How to generate a sequence of dates given starting and ending dates using AWK of BASH scripts?
I have a data set with the following format
The first and second fields denote the dates (M/D/YYYY) of starting and ending of a study.
How one expand the data into the desired output format, taking into account the leap ... | If you have `gawk`:
```
#!/usr/bin/gawk -f
{
split($1,s,"/")
split($2,e,"/")
st=mktime(s[3] " " s[1] " " s[2] " 0 0 0")
et=mktime(e[3] " " e[1] " " e[2] " 0 0 0")
for (i=et;i>=st;i-=60*60*24) print strftime("%m/%d/%Y",i)
}
```
Demonstration:
```
./daterange.awk inputfile
```
Output:
```
07/07/2... |
21759562 | Extract lines between two line numbers in shell | 25 | 2014-02-13 16:14:17 | <p>How is this possible in shell using <strong>sed</strong> or any other filter</p>
<p>Lets say that i have two specific line numbers in two variables <code>$line1</code> and <code>$line2</code> and i want to extract lines between these two lines like this</p>
<pre><code>cat my_file_path | command $line1 $line2
</code>... | 53,413 | 2,250,162 | 2025-08-18 20:42:52 | 21,759,654 | 13 | 2014-02-13 16:18:00 | 164,835 | 2014-02-13 16:18:00 | https://stackoverflow.com/q/21759562 | https://stackoverflow.com/a/21759654 | <p>without testing:</p>
<pre><code>awk -v s="$line1" -v e="$line2" 'NR>s&&NR<e' file
</code></pre>
<p>you can control the "inclusive/exclusive" with <code>>= or <=</code></p>
<p>if you want to make it safe for leading/trailing spaces in your shell var:</p>
<pre><code> awk -v s="$line1" -v e="$li... | <p>without testing:</p> <pre><code>awk -v s="$line1" -v e="$line2" 'NR>s&&NR<e' file </code></pre> <p>you can control the "inclusive/exclusive" with <code>>= or <=</code></p> <p>if you want to make it safe for leading/trailing spaces in your shell var:</p> <pre><code> awk -v s="$line1" -v e="$li... | 387, 390, 5282 | bash, sed, shell | <h1>Extract lines between two line numbers in shell</h1>
<p>How is this possible in shell using <strong>sed</strong> or any other filter</p>
<p>Lets say that i have two specific line numbers in two variables <code>$line1</code> and <code>$line2</code> and i want to extract lines between these two lines like this</p>
<p... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,073 | bash | # Extract lines between two line numbers in shell
How is this possible in shell using **sed** or any other filter
Lets say that i have two specific line numbers in two variables `$line1` and `$line2` and i want to extract lines between these two lines like this
```
cat my_file_path | command $line1 $line2
```
Examp... | without testing:
```
awk -v s="$line1" -v e="$line2" 'NR>s&&NR<e' file
```
you can control the "inclusive/exclusive" with `>= or <=`
if you want to make it safe for leading/trailing spaces in your shell var:
```
awk -v s="$line1" -v e="$line2" 'NR>1*s&&NR<1*e' file
``` |
5734365 | Run a command at a specific time | 25 | 2011-04-20 17:40:04 | <p>I'm trying to run a command at a specific time. I've looked at the "at" command, but I don't know how to get it working...</p>
<p>Here's what I do:</p>
<pre><code>at 1843 (Enter)
php /run/this/script.php (Ctrl+D)
</code></pre>
<p>But how do I do this in a bash script? I mean, I need to press enter and "Ctrl+D" to... | 57,131 | 395,974 | 2014-05-07 09:55:12 | 5,734,409 | 13 | 2011-04-20 17:43:27 | 182,668 | 2011-04-20 18:01:58 | https://stackoverflow.com/q/5734365 | https://stackoverflow.com/a/5734409 | <p>You could try this:</p>
<pre><code>at 1843 <<_EOF_
php /run/this/script.php
_EOF_
</code></pre>
<p><em>edit</em> if what you want to do is run Firefox, try this:</p>
<pre><code>at 1843 <<_EOF_
DISPLAY=:0.0 /usr/bin/firefox
_EOF_
</code></pre>
| <p>You could try this:</p> <pre><code>at 1843 <<_EOF_ php /run/this/script.php _EOF_ </code></pre> <p><em>edit</em> if what you want to do is run Firefox, try this:</p> <pre><code>at 1843 <<_EOF_ DISPLAY=:0.0 /usr/bin/firefox _EOF_ </code></pre> | 58, 387, 1796, 90171 | at-job, bash, command, linux | <h1>Run a command at a specific time</h1>
<p>I'm trying to run a command at a specific time. I've looked at the "at" command, but I don't know how to get it working...</p>
<p>Here's what I do:</p>
<pre><code>at 1843 (Enter)
php /run/this/script.php (Ctrl+D)
</code></pre>
<p>But how do I do this in a bash script? I m... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,074 | bash | # Run a command at a specific time
I'm trying to run a command at a specific time. I've looked at the "at" command, but I don't know how to get it working...
Here's what I do:
```
at 1843 (Enter)
php /run/this/script.php (Ctrl+D)
```
But how do I do this in a bash script? I mean, I need to press enter and "Ctrl+D" ... | You could try this:
```
at 1843 <<_EOF_
php /run/this/script.php
_EOF_
```
*edit* if what you want to do is run Firefox, try this:
```
at 1843 <<_EOF_
DISPLAY=:0.0 /usr/bin/firefox
_EOF_
``` |
63622336 | Unable to connect to the server: dial tcp: lookup <Server Location>: no such host | 24 | 2020-08-27 18:41:16 | <p>I'm beginning to build out a kubernetes cluster for our applications. We are using Azure for cloud services, so my K8s cluster is built using AKS. The AKs cluster was created using the portal interface for Azure. It has one node, and I am attempting to create a pod with a single container to deploy to the node. Wher... | 101,163 | 13,899,576 | 2023-04-09 18:40:28 | 69,208,521 | 13 | 2021-09-16 12:33:34 | 5,545,755 | 2022-06-22 06:02:41 | https://stackoverflow.com/q/63622336 | https://stackoverflow.com/a/69208521 | <p>As of now, the aks run command adds a <a href="https://learn.microsoft.com/en-gb/azure/aks/private-clusters#options-for-connecting-to-the-private-cluster" rel="nofollow noreferrer">fourth option</a> to connect to private clusters extending <a href="https://stackoverflow.com/users/7001697/darius">@Darius</a>'s <a hre... | <p>As of now, the aks run command adds a <a href="https://learn.microsoft.com/en-gb/azure/aks/private-clusters#options-for-connecting-to-the-private-cluster" rel="nofollow noreferrer">fourth option</a> to connect to private clusters extending <a href="https://stackoverflow.com/users/7001697/darius">@Darius</a>'s <a hre... | 526, 14158, 106338, 120010, 131335 | azure, azure-aks, kubectl, kubernetes, powershell | <h1>Unable to connect to the server: dial tcp: lookup <Server Location>: no such host</h1>
<p>I'm beginning to build out a kubernetes cluster for our applications. We are using Azure for cloud services, so my K8s cluster is built using AKS. The AKs cluster was created using the portal interface for Azure. It has one no... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,075 | bash | # Unable to connect to the server: dial tcp: lookup : no such host
I'm beginning to build out a kubernetes cluster for our applications. We are using Azure for cloud services, so my K8s cluster is built using AKS. The AKs cluster was created using the portal interface for Azure. It has one node, and I am attempting to... | As of now, the aks run command adds a [fourth option](https://learn.microsoft.com/en-gb/azure/aks/private-clusters#options-for-connecting-to-the-private-cluster) to connect to private clusters extending [@Darius](https://stackoverflow.com/users/7001697/darius)'s [three options](https://stackoverflow.com/a/66002325) pos... |
43904684 | List files with path and file size only in Command Line | 24 | 2017-05-11 00:35:29 | <p><em>Windows Command Line (or maybe PowerShell).</em></p>
<p>How can I list all files, recursively, with full path and filesize, but without anything else and export to a .txt file. Much preferably a code that works for whichever current directory I am in with the Command Line (so does not require manual entering of... | 94,010 | 3,026,965 | 2020-07-10 14:40:15 | 43,905,575 | 13 | 2017-05-11 02:36:39 | 1,625,308 | 2017-05-11 02:36:39 | https://stackoverflow.com/q/43904684 | https://stackoverflow.com/a/43905575 | <pre><code>Get-ChildItem -Recurse | select FullName,Length | Format-Table -HideTableHeaders | Out-File filelist.txt
</code></pre>
| <pre><code>Get-ChildItem -Recurse | select FullName,Length | Format-Table -HideTableHeaders | Out-File filelist.txt </code></pre> | 64, 526, 1062, 1231, 9938 | command-line, command-prompt, filenames, powershell, windows | <h1>List files with path and file size only in Command Line</h1>
<p><em>Windows Command Line (or maybe PowerShell).</em></p>
<p>How can I list all files, recursively, with full path and filesize, but without anything else and export to a .txt file. Much preferably a code that works for whichever current directory I am... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,076 | bash | # List files with path and file size only in Command Line
*Windows Command Line (or maybe PowerShell).*
How can I list all files, recursively, with full path and filesize, but without anything else and export to a .txt file. Much preferably a code that works for whichever current directory I am in with the Command Li... | ```
Get-ChildItem -Recurse | select FullName,Length | Format-Table -HideTableHeaders | Out-File filelist.txt
``` |
22233702 | How to download the SSL certificate from a website using PowerShell? | 24 | 2014-03-06 19:07:54 | <p>I want to download the SSL certificate from, say <a href="https://www.outlook.com" rel="noreferrer">https://www.outlook.com</a>, using PowerShell.
Is it possible? Could someone help me?</p>
| 72,155 | 3,389,719 | 2025-10-02 09:57:37 | 22,236,908 | 13 | 2014-03-06 21:56:47 | 1,105,996 | 2014-03-06 21:56:47 | https://stackoverflow.com/q/22233702 | https://stackoverflow.com/a/22236908 | <p>You should be able to get the public key by using the <code>ServicePoint</code> property on the <code>HttpWebRequest</code> object. This necessary information will be populated once we have made a http request to the site in question.</p>
<p>If the request is made to a site which has an untrusted certificate the Ge... | <p>You should be able to get the public key by using the <code>ServicePoint</code> property on the <code>HttpWebRequest</code> object. This necessary information will be populated once we have made a http request to the site in question.</p> <p>If the request is made to a site which has an untrusted certificate the Ge... | 526, 641, 14423 | powershell, ssl, ssl-certificate | <h1>How to download the SSL certificate from a website using PowerShell?</h1>
<p>I want to download the SSL certificate from, say <a href="https://www.outlook.com" rel="noreferrer">https://www.outlook.com</a>, using PowerShell.
Is it possible? Could someone help me?</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,077 | bash | # How to download the SSL certificate from a website using PowerShell?
I want to download the SSL certificate from, say <https://www.outlook.com>, using PowerShell.
Is it possible? Could someone help me? | You should be able to get the public key by using the `ServicePoint` property on the `HttpWebRequest` object. This necessary information will be populated once we have made a http request to the site in question.
If the request is made to a site which has an untrusted certificate the GetResponse method will throw an e... |
3490810 | Powershell File Compare | 24 | 2010-08-16 05:30:19 | <p>I am using a PowerShell script to move some files around on some servers.
I want to test if a file I am going to move already exists in the destination.
Not just a file with the same name.</p>
<p>I thought</p>
<p><code>Compare-Object $File1 $File2</code><br>
Should do it but no matter what the files are it always ... | 34,004 | 421,389 | 2020-03-21 10:08:39 | 3,496,439 | 13 | 2010-08-16 19:10:30 | 8,718 | 2010-08-16 19:10:30 | https://stackoverflow.com/q/3490810 | https://stackoverflow.com/a/3496439 | <p>I guess it's going to depend on your definition of "The same"</p>
<pre><code>Compare-Object (ls Source\Test.*) (ls Dest\Test.*) -Property Name, Length, LastWriteTime
</code></pre>
<p>That will compare the actual FILE objects by name, length, and modified date. Adding -IncludeEqual will result in also showing ones... | <p>I guess it's going to depend on your definition of "The same"</p> <pre><code>Compare-Object (ls Source\Test.*) (ls Dest\Test.*) -Property Name, Length, LastWriteTime </code></pre> <p>That will compare the actual FILE objects by name, length, and modified date. Adding -IncludeEqual will result in also showing ones... | 526 | powershell | <h1>Powershell File Compare</h1>
<p>I am using a PowerShell script to move some files around on some servers.
I want to test if a file I am going to move already exists in the destination.
Not just a file with the same name.</p>
<p>I thought</p>
<p><code>Compare-Object $File1 $File2</code><br>
Should do it but no mat... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,078 | bash | # Powershell File Compare
I am using a PowerShell script to move some files around on some servers.
I want to test if a file I am going to move already exists in the destination.
Not just a file with the same name.
I thought
`Compare-Object $File1 $File2`
Should do it but no matter what the files are it always ret... | I guess it's going to depend on your definition of "The same"
```
Compare-Object (ls Source\Test.*) (ls Dest\Test.*) -Property Name, Length, LastWriteTime
```
That will compare the actual FILE objects by name, length, and modified date. Adding -IncludeEqual will result in also showing ones that are the same in both p... |
1617724 | How to replace newlines with tab characters? | 24 | 2009-10-24 11:23:50 | <p>I have pattern like below</p>
<pre><code>hi
hello
hallo
greetings
salutations
no more hello for you
</code></pre>
<p>I am trying to replace all newlines with tab using the following command</p>
<pre><code>sed -e "s_/\n_/\t_g"
</code></pre>
<p>but it's not working.</p>
<p>Could anybody please help? I'm looking f... | 53,302 | 134,713 | 2025-06-04 12:08:22 | 1,617,769 | 13 | 2009-10-24 11:42:40 | 131,527 | 2009-10-24 11:42:40 | https://stackoverflow.com/q/1617724 | https://stackoverflow.com/a/1617769 | <p>not sure about output you want</p>
<pre><code># awk -vRS="\n" -vORS="\t" '1' file
hi hello hallo greetings salutations no more hello for you
</code></pre>
| <p>not sure about output you want</p> <pre><code># awk -vRS="\n" -vORS="\t" '1' file hi hello hallo greetings salutations no more hello for you </code></pre> | 34, 390, 990, 5282 | awk, sed, shell, unix | <h1>How to replace newlines with tab characters?</h1>
<p>I have pattern like below</p>
<pre><code>hi
hello
hallo
greetings
salutations
no more hello for you
</code></pre>
<p>I am trying to replace all newlines with tab using the following command</p>
<pre><code>sed -e "s_/\n_/\t_g"
</code></pre>
<p>but it's not wor... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,079 | bash | # How to replace newlines with tab characters?
I have pattern like below
```
hi
hello
hallo
greetings
salutations
no more hello for you
```
I am trying to replace all newlines with tab using the following command
```
sed -e "s_/\n_/\t_g"
```
but it's not working.
Could anybody please help? I'm looking for a solut... | not sure about output you want
```
# awk -vRS="\n" -vORS="\t" '1' file
hi hello hallo greetings salutations no more hello for you
``` |
18645759 | tail-like continuous ls (file list) | 23 | 2013-09-05 20:52:55 | <p>I am monitoring the new files created in a folder in linux. Every now and then I issue an "ls -ltr" in it. But I wish there was a program/script that would automatically print it, and only the latest entries. I did a short while loop to list it, but it would repeat the entries that were not new and it would keep my ... | 20,563 | 2,193,235 | 2025-11-01 17:12:12 | 18,645,921 | 13 | 2013-09-05 21:03:12 | null | 2013-09-05 21:03:12 | https://stackoverflow.com/q/18645759 | https://stackoverflow.com/a/18645921 | <p>If you have access to <code>inotifywait</code> (available from the inotify-tools package if you are on Debian/Ubuntu) you could write a script like this:</p>
<pre><code>#!/bin/bash
WATCH=/tmp
inotifywait -q -m -e create --format %f $WATCH | while read event
do
ls -ltr $WATCH/$event
done
</code></pre>
<p>This... | <p>If you have access to <code>inotifywait</code> (available from the inotify-tools package if you are on Debian/Ubuntu) you could write a script like this:</p> <pre><code>#!/bin/bash WATCH=/tmp inotifywait -q -m -e create --format %f $WATCH | while read event do ls -ltr $WATCH/$event done </code></pre> <p>This... | 58, 390, 3589 | linux, ls, shell | <h1>tail-like continuous ls (file list)</h1>
<p>I am monitoring the new files created in a folder in linux. Every now and then I issue an "ls -ltr" in it. But I wish there was a program/script that would automatically print it, and only the latest entries. I did a short while loop to list it, but it would repeat the en... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,080 | bash | # tail-like continuous ls (file list)
I am monitoring the new files created in a folder in linux. Every now and then I issue an "ls -ltr" in it. But I wish there was a program/script that would automatically print it, and only the latest entries. I did a short while loop to list it, but it would repeat the entries tha... | If you have access to `inotifywait` (available from the inotify-tools package if you are on Debian/Ubuntu) you could write a script like this:
```
#!/bin/bash
WATCH=/tmp
inotifywait -q -m -e create --format %f $WATCH | while read event
do
ls -ltr $WATCH/$event
done
```
This is a one-liner that won't give you th... |
2732 | Shell scripting input redirection oddities | 23 | 2008-08-05 19:26:00 | <p>Can anyone explain this behavior?
Running:</p>
<pre><code>#!/bin/sh
echo "hello world" | read var1 var2
echo $var1
echo $var2
</code></pre>
<p>results in nothing being ouput, while:</p>
<pre><code>#!/bin/sh
echo "hello world" > test.file
read var1 var2 < test.file
echo $var1
echo $var2
</code></pre>
<p>pro... | 6,748 | 75 | 2021-03-27 14:59:27 | 11,668,996 | 13 | 2012-07-26 12:10:13 | 1,126,841 | 2012-07-26 12:10:13 | https://stackoverflow.com/q/2732 | https://stackoverflow.com/a/11668996 | <p>A recent addition to <code>bash</code> is the <code>lastpipe</code> option, which allows the last command in a pipeline to run in the current shell, not a subshell, when job control is deactivated.</p>
<pre><code>#!/bin/bash
set +m # Deactiveate job control
shopt -s lastpipe
echo "hello world" | read var1 var2... | <p>A recent addition to <code>bash</code> is the <code>lastpipe</code> option, which allows the last command in a pipeline to run in the current shell, not a subshell, when job control is deactivated.</p> <pre><code>#!/bin/bash set +m # Deactiveate job control shopt -s lastpipe echo "hello world" | read var1 var2... | 137448 | dash-shell | <h1>Shell scripting input redirection oddities</h1>
<p>Can anyone explain this behavior?
Running:</p>
<pre><code>#!/bin/sh
echo "hello world" | read var1 var2
echo $var1
echo $var2
</code></pre>
<p>results in nothing being ouput, while:</p>
<pre><code>#!/bin/sh
echo "hello world" > test.file
read var1 var2 < t... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,081 | bash | # Shell scripting input redirection oddities
Can anyone explain this behavior?
Running:
```
#!/bin/sh
echo "hello world" | read var1 var2
echo $var1
echo $var2
```
results in nothing being ouput, while:
```
#!/bin/sh
echo "hello world" > test.file
read var1 var2 < test.file
echo $var1
echo $var2
```
produces the e... | A recent addition to `bash` is the `lastpipe` option, which allows the last command in a pipeline to run in the current shell, not a subshell, when job control is deactivated.
```
#!/bin/bash
set +m # Deactiveate job control
shopt -s lastpipe
echo "hello world" | read var1 var2
echo $var1
echo $var2
```
will ind... |
68573901 | How do I raise X to the power of Y in Powershell? | 22 | 2021-07-29 10:00:22 | <p>I (apparently wrongly) assumed there would be a built-in power <code>operator</code> or <code>function</code> in Powershell, but I it seems there is not, or is there?</p>
| 20,391 | 4,898,202 | 2021-07-29 10:21:29 | 68,573,939 | 13 | 2021-07-29 10:02:46 | 4,898,202 | 2021-07-29 10:02:46 | https://stackoverflow.com/q/68573901 | https://stackoverflow.com/a/68573939 | <p>Never mind, I found the answer:</p>
<pre><code>[Math]::Pow(256,3) # 256 to the power of 3 (= ~16.7 million)
</code></pre>
| <p>Never mind, I found the answer:</p> <pre><code>[Math]::Pow(256,3) # 256 to the power of 3 (= ~16.7 million) </code></pre> | 259, 526, 14881, 20240 | exponent, exponentiation, math, powershell | <h1>How do I raise X to the power of Y in Powershell?</h1>
<p>I (apparently wrongly) assumed there would be a built-in power <code>operator</code> or <code>function</code> in Powershell, but I it seems there is not, or is there?</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,082 | bash | # How do I raise X to the power of Y in Powershell?
I (apparently wrongly) assumed there would be a built-in power `operator` or `function` in Powershell, but I it seems there is not, or is there? | Never mind, I found the answer:
```
[Math]::Pow(256,3) # 256 to the power of 3 (= ~16.7 million)
``` |
35195221 | List process for current user | 22 | 2016-02-04 07:43:14 | <p>As an administrator I can get a users processes by running this</p>
<p><code>Get-Process -IncludeUserName | Where UserName -match test</code></p>
<p>But as a non-administrator I can't use <code>-IncludeUserName</code> because "The 'IncludeUserName' parameter requires elevated user rights".</p>
<p>So if I'm... | 45,850 | 2,072,145 | 2025-11-24 00:05:09 | 35,195,927 | 13 | 2016-02-04 08:25:52 | 311,712 | 2016-02-04 08:25:52 | https://stackoverflow.com/q/35195221 | https://stackoverflow.com/a/35195927 | <p>You can do that through WMI. Here is an excerpt of an article you can find <a href="https://p0w3rsh3ll.wordpress.com/2013/10/30/find-the-owner-of-a-process/" rel="noreferrer">here</a>.</p>
<pre><code>$View = @(
@{l='Handles';e={$_.HandleCount}},
@{l='NPM(K)';e={ (Get-Process -Id $_.ProcessId).NonpagedSystemMemory... | <p>You can do that through WMI. Here is an excerpt of an article you can find <a href="https://p0w3rsh3ll.wordpress.com/2013/10/30/find-the-owner-of-a-process/" rel="noreferrer">here</a>.</p> <pre><code>$View = @( @{l='Handles';e={$_.HandleCount}}, @{l='NPM(K)';e={ (Get-Process -Id $_.ProcessId).NonpagedSystemMemory... | 526, 5910 | powershell, process | <h1>List process for current user</h1>
<p>As an administrator I can get a users processes by running this</p>
<p><code>Get-Process -IncludeUserName | Where UserName -match test</code></p>
<p>But as a non-administrator I can't use <code>-IncludeUserName</code> because "The 'IncludeUserName' parameter requires eleva... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,083 | bash | # List process for current user
As an administrator I can get a users processes by running this
`Get-Process -IncludeUserName | Where UserName -match test`
But as a non-administrator I can't use `-IncludeUserName` because "The 'IncludeUserName' parameter requires elevated user rights".
So if I'm logged on as the us... | You can do that through WMI. Here is an excerpt of an article you can find [here](https://p0w3rsh3ll.wordpress.com/2013/10/30/find-the-owner-of-a-process/).
```
$View = @(
@{l='Handles';e={$_.HandleCount}},
@{l='NPM(K)';e={ (Get-Process -Id $_.ProcessId).NonpagedSystemMemorySize/1KB -as [int]}},
@{l='PM(K)';e={ $_.... |
9800989 | Copy every file of entire directory structure into base path of another | 22 | 2012-03-21 08:29:44 | <p>I have a directory-tree with a lot of files in it. I'd like to copy all of those files into one new directory, but with all files located in the base of the folder.</p>
<p>So I have something like this:</p>
<pre><code> images
├── avatar.png
├── bg.jpg
├── checkbox.png
├── cross.png
├── datat... | 13,851 | 727,341 | 2016-03-08 02:10:40 | 9,801,972 | 13 | 2012-03-21 09:43:06 | 909,233 | 2016-03-08 02:10:40 | https://stackoverflow.com/q/9800989 | https://stackoverflow.com/a/9801972 | <p>you are looking for ways to flatten the directory</p>
<pre><code>find /images -iname '*.jpg' -exec cp --target-directory /newfolder/ {} \;
</code></pre>
<p><code>find</code> all files <code>iname</code> in case insensitive name mode.<br>
<code>cp</code> copy once to <code>--target-directory</code> named <code>/new... | <p>you are looking for ways to flatten the directory</p> <pre><code>find /images -iname '*.jpg' -exec cp --target-directory /newfolder/ {} \; </code></pre> <p><code>find</code> all files <code>iname</code> in case insensitive name mode.<br> <code>cp</code> copy once to <code>--target-directory</code> named <code>/new... | 58, 218, 387, 10193, 25299 | bash, cp, directory, find, linux | <h1>Copy every file of entire directory structure into base path of another</h1>
<p>I have a directory-tree with a lot of files in it. I'd like to copy all of those files into one new directory, but with all files located in the base of the folder.</p>
<p>So I have something like this:</p>
<pre><code> images
├... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,084 | bash | # Copy every file of entire directory structure into base path of another
I have a directory-tree with a lot of files in it. I'd like to copy all of those files into one new directory, but with all files located in the base of the folder.
So I have something like this:
```
images
├── avatar.png
├── bg.jp... | you are looking for ways to flatten the directory
```
find /images -iname '*.jpg' -exec cp --target-directory /newfolder/ {} \;
```
`find` all files `iname` in case insensitive name mode.
`cp` copy once to `--target-directory` named `/newfolder/`.
`{}` expand the list from `find` into the form of `/dir/file.jpg /... |
6238331 | Emacs shell scripts - how to put initial options into the script? | 22 | 2011-06-04 17:34:05 | <p>Inspired by Stack Overflow question <a href="https://stackoverflow.com/questions/2879746/idomatic-batch-processing-of-text-in-emacs">Idomatic batch processing of text in Emacs?</a> I tried out an Emacs shell script with the following headline:</p>
<pre><code>#!/usr/bin/emacs --script
</code></pre>
<p>I put s... | 4,433 | 783,306 | 2022-07-18 02:55:14 | 6,240,904 | 13 | 2011-06-05 03:50:47 | 324,105 | 2012-09-13 10:06:02 | https://stackoverflow.com/q/6238331 | https://stackoverflow.com/a/6240904 | <p>You could always change <code>#!/usr/bin/emacs</code> to something like <code>#!/home/thorsten/bin/emacs-no-site-file</code>, and set that up as:</p>
<pre><code>#!/bin/sh
exec /usr/bin/emacs --no-site-file "$@"
</code></pre>
<p>If this doesn't work for you, or if you wish your script to be portable, then see <a hr... | <p>You could always change <code>#!/usr/bin/emacs</code> to something like <code>#!/home/thorsten/bin/emacs-no-site-file</code>, and set that up as:</p> <pre><code>#!/bin/sh exec /usr/bin/emacs --no-site-file "$@" </code></pre> <p>If this doesn't work for you, or if you wish your script to be portable, then see <a hr... | 371, 390, 3246, 31134 | command-line-arguments, elisp, emacs, shell | <h1>Emacs shell scripts - how to put initial options into the script?</h1>
<p>Inspired by Stack Overflow question <a href="https://stackoverflow.com/questions/2879746/idomatic-batch-processing-of-text-in-emacs">Idomatic batch processing of text in Emacs?</a> I tried out an Emacs shell script with the following hea... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,085 | bash | # Emacs shell scripts - how to put initial options into the script?
Inspired by Stack Overflow question [Idomatic batch processing of text in Emacs?](https://stackoverflow.com/questions/2879746/idomatic-batch-processing-of-text-in-emacs) I tried out an Emacs shell script with the following headline:
```
#!/usr/bin/em... | You could always change `#!/usr/bin/emacs` to something like `#!/home/thorsten/bin/emacs-no-site-file`, and set that up as:
```
#!/bin/sh
exec /usr/bin/emacs --no-site-file "$@"
```
If this doesn't work for you, or if you wish your script to be portable, then see [Gilles' answer below](https://stackoverflow.com/quest... |
1210942 | catching return code of a command with "invoke-command" - Powershell 2 | 22 | 2009-07-31 06:23:56 | <p>I am using "invoke-command" to execute a script on a remote machine.</p>
<pre><code>invoke-command -computername <server_name> -scriptblock {command to execute the script}
</code></pre>
<p>My script returns "-1" when there are any errors.
So, I wanted to ensure that script has executed successfully by checki... | 53,713 | null | 2023-04-19 13:08:59 | 1,211,693 | 13 | 2009-07-31 09:57:35 | 73,070 | 2011-03-10 20:19:41 | https://stackoverflow.com/q/1210942 | https://stackoverflow.com/a/1211693 | <p>I think if you run a command that way on another server there is no way you can get at the return code of your script there. This is because <code>Invoke-Command</code> simply runs one command on the remote machine, probably within a single temporary session and you can't connect to that session again.</p>
<p>What ... | <p>I think if you run a command that way on another server there is no way you can get at the return code of your script there. This is because <code>Invoke-Command</code> simply runs one command on the remote machine, probably within a single temporary session and you can't connect to that session again.</p> <p>What ... | 526, 9206 | powershell, return-value | <h1>catching return code of a command with "invoke-command" - Powershell 2</h1>
<p>I am using "invoke-command" to execute a script on a remote machine.</p>
<pre><code>invoke-command -computername <server_name> -scriptblock {command to execute the script}
</code></pre>
<p>My script returns "-1" when there are an... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,086 | bash | # catching return code of a command with "invoke-command" - Powershell 2
I am using "invoke-command" to execute a script on a remote machine.
```
invoke-command -computername <server_name> -scriptblock {command to execute the script}
```
My script returns "-1" when there are any errors.
So, I wanted to ensure that s... | I think if you run a command that way on another server there is no way you can get at the return code of your script there. This is because `Invoke-Command` simply runs one command on the remote machine, probably within a single temporary session and you can't connect to that session again.
What you *can* do, however... |
128853 | How do I run a command in a loop until I see some string in stdout? | 22 | 2008-09-24 18:15:11 | <p>I'm sure there's some trivial one-liner with perl, ruby, bash whatever that would let me run a command in a loop until I observe some string in stdout, then stop. Ideally, I'd like to capture stdout as well, but if it's going to console, that might be enough. </p>
<p>The particular environment in question at the ... | 23,004 | 7,671 | 2015-04-20 06:11:02 | 128,905 | 13 | 2008-09-24 18:26:22 | 872 | 2008-09-24 18:26:22 | https://stackoverflow.com/q/128853 | https://stackoverflow.com/a/128905 | <p>In Perl:</p>
<pre><code>#!/usr/local/bin/perl -w
if (@ARGV != 2)
{
print "Usage: watchit.pl <cmd> <str>\n";
exit(1);
}
$cmd = $ARGV[0];
$str = $ARGV[1];
while (1)
{
my $output = `$cmd`;
print $output; # or dump to file if desired
if ($output =~ /$str/)
{
exit(0);
}... | <p>In Perl:</p> <pre><code>#!/usr/local/bin/perl -w if (@ARGV != 2) { print "Usage: watchit.pl <cmd> <str>\n"; exit(1); } $cmd = $ARGV[0]; $str = $ARGV[1]; while (1) { my $output = `$cmd`; print $output; # or dump to file if desired if ($output =~ /$str/) { exit(0); }... | 58, 387, 390 | bash, linux, shell | <h1>How do I run a command in a loop until I see some string in stdout?</h1>
<p>I'm sure there's some trivial one-liner with perl, ruby, bash whatever that would let me run a command in a loop until I observe some string in stdout, then stop. Ideally, I'd like to capture stdout as well, but if it's going to console, t... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,087 | bash | # How do I run a command in a loop until I see some string in stdout?
I'm sure there's some trivial one-liner with perl, ruby, bash whatever that would let me run a command in a loop until I observe some string in stdout, then stop. Ideally, I'd like to capture stdout as well, but if it's going to console, that might ... | In Perl:
```
#!/usr/local/bin/perl -w
if (@ARGV != 2)
{
print "Usage: watchit.pl <cmd> <str>\n";
exit(1);
}
$cmd = $ARGV[0];
$str = $ARGV[1];
while (1)
{
my $output = `$cmd`;
print $output; # or dump to file if desired
if ($output =~ /$str/)
{
exit(0);
}
}
```
Example:
```
[bas... |
42789273 | bash: choose default from case when enter is pressed in a "select" prompt | 21 | 2017-03-14 14:51:45 | <p>I'm prompting questions in a bash script like this:</p>
<pre><code>optionsAudits=("Yep" "Nope")
echo "Include audits?"
select opt in "${optionsAudits[@]}"; do
case $REPLY in
1) includeAudits=true; break ;;
2) includeAudits=false; break ;;
"\n") echo "You pressed e... | 14,851 | 163,341 | 2025-03-14 11:47:57 | 42,790,579 | 13 | 2017-03-14 15:49:23 | 45,375 | 2025-03-14 11:47:57 | https://stackoverflow.com/q/42789273 | https://stackoverflow.com/a/42790579 | <p>To complement <a href="https://stackoverflow.com/a/42790075/45375">Aserre's helpful answer</a>, which explains the problem with your code and offers an effective workaround, with <strong>background information and a generic, reusable custom <code>select</code> implementation that allows empty input</strong>:</p>
<hr... | <p>To complement <a href="https://stackoverflow.com/a/42790075/45375">Aserre's helpful answer</a>, which explains the problem with your code and offers an effective workaround, with <strong>background information and a generic, reusable custom <code>select</code> implementation that allows empty input</strong>:</p> <hr... | 387, 3222, 4063 | bash, interactive, user-input | <h1>bash: choose default from case when enter is pressed in a "select" prompt</h1>
<p>I'm prompting questions in a bash script like this:</p>
<pre><code>optionsAudits=("Yep" "Nope")
echo "Include audits?"
select opt in "${optionsAudits[@]}"; do
case $REPLY in
1) includeAudits=true; break ;;... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,088 | bash | # bash: choose default from case when enter is pressed in a "select" prompt
I'm prompting questions in a bash script like this:
```
optionsAudits=("Yep" "Nope")
echo "Include audits?"
select opt in "${optionsAudits[@]}"; do
case $REPLY in
1) includeAudits=true; break ;;
2) incl... | To complement [Aserre's helpful answer](https://stackoverflow.com/a/42790075/45375), which explains the problem with your code and offers an effective workaround, with **background information and a generic, reusable custom `select` implementation that allows empty input**:
---
### Background information
To spell it... |
42355649 | Array Types In Powershell - System.Object[] vs. arrays with specific types | 21 | 2017-02-20 22:53:13 | <p>Why does caling <code>GetType().Name</code> on an array of strings return <code>Object[]</code> and not <code>String[]</code>?
This seems to happen with any element type, for example <code>Import-Csv</code> will give you an <code>Object[]</code> but each element is a <code>PSCustomObject</code>.</p>
<p>Here's an e... | 61,888 | 2,063,755 | 2023-04-22 21:32:04 | 42,355,869 | 13 | 2017-02-20 23:13:14 | 2,203,589 | 2017-02-21 21:20:57 | https://stackoverflow.com/q/42355649 | https://stackoverflow.com/a/42355869 | <p>Because you have not specified the data type of the array explicitly. </p>
<p>For instance, assigning an integer to <code>$x[1]</code> would work, because the array's type is <code>Object[]</code>.</p>
<p>If you specify a data type while constructing the array, you won't be able to assign values of an incompatible... | <p>Because you have not specified the data type of the array explicitly. </p> <p>For instance, assigning an integer to <code>$x[1]</code> would work, because the array's type is <code>Object[]</code>.</p> <p>If you specify a data type while constructing the array, you won't be able to assign values of an incompatible... | 114, 343, 526, 1926, 12095 | arrays, coercion, collections, powershell, types | <h1>Array Types In Powershell - System.Object[] vs. arrays with specific types</h1>
<p>Why does caling <code>GetType().Name</code> on an array of strings return <code>Object[]</code> and not <code>String[]</code>?
This seems to happen with any element type, for example <code>Import-Csv</code> will give you an <code>Ob... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,089 | bash | # Array Types In Powershell - System.Object[] vs. arrays with specific types
Why does caling `GetType().Name` on an array of strings return `Object[]` and not `String[]`?
This seems to happen with any element type, for example `Import-Csv` will give you an `Object[]` but each element is a `PSCustomObject`.
Here's an ... | Because you have not specified the data type of the array explicitly.
For instance, assigning an integer to `$x[1]` would work, because the array's type is `Object[]`.
If you specify a data type while constructing the array, you won't be able to assign values of an incompatible type later:
```
C:\PS> [int[]] $myArra... |
12141938 | How to detect the last line in awk before END | 21 | 2012-08-27 12:24:33 | <p>I am trying to add last line to the file which I am creating. How is it possible to detect the last line of a file in awk before <code>END</code> ? I need to do this because the variables don't work in the <code>END</code> block,
so I am trying to avoid using <code>END</code>. </p>
<pre><code>awk ' { do some thing... | 51,015 | 903,790 | 2022-02-06 20:50:01 | 12,142,183 | 13 | 2012-08-27 12:41:26 | 773,159 | 2012-08-27 12:41:26 | https://stackoverflow.com/q/12141938 | https://stackoverflow.com/a/12142183 | <p>One option is to use <code>getline</code> function to process the file. It returns <code>1</code> on sucess, <code>0</code> on end of file and <code>-1</code> on an error.</p>
<pre><code>awk '
FNR == 1 {
## Process first line.
print FNR ": " $0;
while ( getline == 1 ) {
## ... | <p>One option is to use <code>getline</code> function to process the file. It returns <code>1</code> on sucess, <code>0</code> on end of file and <code>-1</code> on an error.</p> <pre><code>awk ' FNR == 1 { ## Process first line. print FNR ": " $0; while ( getline == 1 ) { ## ... | 390, 990, 9325 | awk, line, shell | <h1>How to detect the last line in awk before END</h1>
<p>I am trying to add last line to the file which I am creating. How is it possible to detect the last line of a file in awk before <code>END</code> ? I need to do this because the variables don't work in the <code>END</code> block,
so I am trying to avoid using <... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,090 | bash | # How to detect the last line in awk before END
I am trying to add last line to the file which I am creating. How is it possible to detect the last line of a file in awk before `END` ? I need to do this because the variables don't work in the `END` block,
so I am trying to avoid using `END`.
```
awk ' { do some thing... | One option is to use `getline` function to process the file. It returns `1` on sucess, `0` on end of file and `-1` on an error.
```
awk '
FNR == 1 {
## Process first line.
print FNR ": " $0;
while ( getline == 1 ) {
## Process from second to last line.
print FNR ":... |
10031344 | Why does this shell pipeline exit? | 21 | 2012-04-05 15:18:00 | <p>I have a shell pipeline for generating 10 characters password at random:</p>
<pre><code>cat /dev/urandom | base64 | head -c 10
</code></pre>
<p>My question is <code>cat /dev/urandom | base64</code> is an infinite output stream which will not exit by itself. But why does appending <code>head -c 10</code> make the w... | 2,605 | 404,264 | 2024-03-20 08:35:59 | 10,044,006 | 13 | 2012-04-06 13:15:51 | 844,759 | 2024-03-20 08:35:59 | https://stackoverflow.com/q/10031344 | https://stackoverflow.com/a/10044006 | <p>After <code>base64</code> outputs 10 bytes, <code>head</code> gets enough inputs and exits. When the former attempts to output more bytes, it will receive <a href="http://en.wikipedia.org/wiki/SIGPIPE" rel="nofollow noreferrer">SIGPIPE signal</a> and hence exits too。For the same reason, <code>cat</code> will exit in... | <p>After <code>base64</code> outputs 10 bytes, <code>head</code> gets enough inputs and exits. When the former attempts to output more bytes, it will receive <a href="http://en.wikipedia.org/wiki/SIGPIPE" rel="nofollow noreferrer">SIGPIPE signal</a> and hence exits too。For the same reason, <code>cat</code> will exit in... | 34, 58, 387, 5813 | bash, linux, pipe, unix | <h1>Why does this shell pipeline exit?</h1>
<p>I have a shell pipeline for generating 10 characters password at random:</p>
<pre><code>cat /dev/urandom | base64 | head -c 10
</code></pre>
<p>My question is <code>cat /dev/urandom | base64</code> is an infinite output stream which will not exit by itself. But why does ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,091 | bash | # Why does this shell pipeline exit?
I have a shell pipeline for generating 10 characters password at random:
```
cat /dev/urandom | base64 | head -c 10
```
My question is `cat /dev/urandom | base64` is an infinite output stream which will not exit by itself. But why does appending `head -c 10` make the whole pipeli... | After `base64` outputs 10 bytes, `head` gets enough inputs and exits. When the former attempts to output more bytes, it will receive [SIGPIPE signal](http://en.wikipedia.org/wiki/SIGPIPE) and hence exits too。For the same reason, `cat` will exit in turn. |
2791069 | How to use parallel execution in a shell script? | 21 | 2010-05-07 19:09:20 | <p>I have a C shell script that does something like this:</p>
<pre><code>#!/bin/csh
gcc example.c -o ex
gcc combine.c -o combine
ex file1 r1 <-- 1
ex file2 r2 <-- 2
ex file3 r3 <-- 3
#... many more like the above
combine r1 r2 r3 final
\rm r1 r2 r3
</code></pre>
<p>Is there some way I can make li... | 44,401 | 113,124 | 2015-03-30 06:57:58 | 2,791,091 | 13 | 2010-05-07 19:13:51 | 13,422 | 2010-05-09 16:19:03 | https://stackoverflow.com/q/2791069 | https://stackoverflow.com/a/2791091 | <p>Convert this into a Makefile with proper dependencies. Then you can use <code>make -j</code> to have Make run everything possible in parallel.</p>
<p>Note that all the indents in a Makefile <em>must</em> be TABs. TAB shows Make where the commands to run are.</p>
<p>Also note that this Makefile is now using GNU Mak... | <p>Convert this into a Makefile with proper dependencies. Then you can use <code>make -j</code> to have Make run everything possible in parallel.</p> <p>Note that all the indents in a Makefile <em>must</em> be TABs. TAB shows Make where the commands to run are.</p> <p>Also note that this Makefile is now using GNU Mak... | 34, 353, 390, 2829 | csh, parallel-processing, shell, unix | <h1>How to use parallel execution in a shell script?</h1>
<p>I have a C shell script that does something like this:</p>
<pre><code>#!/bin/csh
gcc example.c -o ex
gcc combine.c -o combine
ex file1 r1 <-- 1
ex file2 r2 <-- 2
ex file3 r3 <-- 3
#... many more like the above
combine r1 r2 r3 final
\rm ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,092 | bash | # How to use parallel execution in a shell script?
I have a C shell script that does something like this:
```
#!/bin/csh
gcc example.c -o ex
gcc combine.c -o combine
ex file1 r1 <-- 1
ex file2 r2 <-- 2
ex file3 r3 <-- 3
#... many more like the above
combine r1 r2 r3 final
\rm r1 r2 r3
```
Is there some w... | Convert this into a Makefile with proper dependencies. Then you can use `make -j` to have Make run everything possible in parallel.
Note that all the indents in a Makefile *must* be TABs. TAB shows Make where the commands to run are.
Also note that this Makefile is now using GNU Make extensions (the wildcard and subs... |
56872978 | Direnv not loading environment when shell starts in a directory with .envrc | 20 | 2019-07-03 14:59:03 | <p>Imagine I am in a shell with the working directory set to a directory that contains an <code>.envrc</code> file. When I now open up a new tab in my terminal emulator, a new shell is launched into the same working directory as the original shell.</p>
<p>For some reason, the <code>.envrc</code> file is not loaded in ... | 25,476 | 322,863 | 2022-02-22 08:01:45 | 56,973,231 | 13 | 2019-07-10 14:44:43 | 9,076,314 | 2020-03-11 13:01:12 | https://stackoverflow.com/q/56872978 | https://stackoverflow.com/a/56973231 | <p>Under macOS Mojave (and probably older versions), saving a <code>.bashrc</code> has no effect. Instead, use a <code>.bash_profile</code>.</p>
| <p>Under macOS Mojave (and probably older versions), saving a <code>.bashrc</code> has no effect. Instead, use a <code>.bash_profile</code>.</p> | 369, 387, 9013, 113769, 126992 | bash, direnv, environment-variables, macos, terminal.app | <h1>Direnv not loading environment when shell starts in a directory with .envrc</h1>
<p>Imagine I am in a shell with the working directory set to a directory that contains an <code>.envrc</code> file. When I now open up a new tab in my terminal emulator, a new shell is launched into the same working directory as the or... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,093 | bash | # Direnv not loading environment when shell starts in a directory with .envrc
Imagine I am in a shell with the working directory set to a directory that contains an `.envrc` file. When I now open up a new tab in my terminal emulator, a new shell is launched into the same working directory as the original shell.
For s... | Under macOS Mojave (and probably older versions), saving a `.bashrc` has no effect. Instead, use a `.bash_profile`. |
42481726 | how to modify conda 'source activate' ps1 behavior | 20 | 2017-02-27 09:12:37 | <p>my current bash ps1 is as follows:</p>
<pre><code>bldred='\e[1;31m' # Red
bldcyn='\e[1;36m' # Cyan
bldwht='\e[1;37m' # White
txtrst='\e[0m' # Text Reset - Useful for avoiding color bleed
export PS1="\n\[$bldred\]\u\[$txtrst\]@\[$bldwht\]\h\[$txtrst\]:\[$bldcyn\]\w\[$txtrst\]$ "
</code></pre>
<p>However, runnin... | 14,704 | 3,943,552 | 2020-10-03 15:58:36 | 42,482,979 | 13 | 2017-02-27 10:11:11 | 3,943,552 | 2020-10-03 15:58:36 | https://stackoverflow.com/q/42481726 | https://stackoverflow.com/a/42482979 | <p>The simplest solution I have found is to move the newline from <code>PS1</code> to <code>PROMPT_COMMAND</code>:</p>
<pre><code>PROMPT_COMMAND="printf '\n'"
export PS1="\[$bldred\]\u\[$txtrst\]@\[$bldwht\]\h\[$txtrst\]:\[$bldcyn\]\w\[$txtrst\]$ "
</code></pre>
<p>This allows <code>conda</code> to ... | <p>The simplest solution I have found is to move the newline from <code>PS1</code> to <code>PROMPT_COMMAND</code>:</p> <pre><code>PROMPT_COMMAND="printf '\n'" export PS1="\[$bldred\]\u\[$txtrst\]@\[$bldwht\]\h\[$txtrst\]:\[$bldcyn\]\w\[$txtrst\]$ " </code></pre> <p>This allows <code>conda</code> to ... | 387, 53034, 96537 | bash, conda, ps1 | <h1>how to modify conda 'source activate' ps1 behavior</h1>
<p>my current bash ps1 is as follows:</p>
<pre><code>bldred='\e[1;31m' # Red
bldcyn='\e[1;36m' # Cyan
bldwht='\e[1;37m' # White
txtrst='\e[0m' # Text Reset - Useful for avoiding color bleed
export PS1="\n\[$bldred\]\u\[$txtrst\]@\[$bldwht\]\h\[$txtrst\]:\... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,094 | bash | # how to modify conda 'source activate' ps1 behavior
my current bash ps1 is as follows:
```
bldred='\e[1;31m' # Red
bldcyn='\e[1;36m' # Cyan
bldwht='\e[1;37m' # White
txtrst='\e[0m' # Text Reset - Useful for avoiding color bleed
export PS1="\n\[$bldred\]\u\[$txtrst\]@\[$bldwht\]\h\[$txtrst\]:\[$bldcyn\]\w\[$txtrs... | The simplest solution I have found is to move the newline from `PS1` to `PROMPT_COMMAND`:
```
PROMPT_COMMAND="printf '\n'"
export PS1="\[$bldred\]\u\[$txtrst\]@\[$bldwht\]\h\[$txtrst\]:\[$bldcyn\]\w\[$txtrst\]$ "
```
This allows `conda` to maintain it's default `PS1` behavior all while separating bash commands with n... |
30721317 | How to merge two arrays in a zipper like fashion in Bash? | 20 | 2015-06-09 00:46:27 | <p>I am trying to merge two arrays into one in a zipper like fashion.</p>
<pre><code>array1=(one three five seven)
array2=(two four six eight)
</code></pre>
<p>How do I get this output?</p>
<pre><code>one two three four five six seven eight
</code></pre>
<p>I have tried with nested for-loops but can't figure it out.
I ... | 12,765 | 434,533 | 2025-01-21 15:51:31 | 30,721,876 | 13 | 2015-06-09 02:00:45 | 2,911,710 | 2020-07-25 21:59:32 | https://stackoverflow.com/q/30721317 | https://stackoverflow.com/a/30721876 | <p>Assuming both arrays are the same size,</p>
<pre><code>unset result
for (( i=0; i<${#array1[*]}; ++i)); do
result+=( "${array1[$i]}" "${array2[$i]}" )
done
</code></pre>
| <p>Assuming both arrays are the same size,</p> <pre><code>unset result for (( i=0; i<${#array1[*]}; ++i)); do result+=( "${array1[$i]}" "${array2[$i]}" ) done </code></pre> | 114, 387 | arrays, bash | <h1>How to merge two arrays in a zipper like fashion in Bash?</h1>
<p>I am trying to merge two arrays into one in a zipper like fashion.</p>
<pre><code>array1=(one three five seven)
array2=(two four six eight)
</code></pre>
<p>How do I get this output?</p>
<pre><code>one two three four five six seven eight
</code></pre... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,095 | bash | # How to merge two arrays in a zipper like fashion in Bash?
I am trying to merge two arrays into one in a zipper like fashion.
```
array1=(one three five seven)
array2=(two four six eight)
```
How do I get this output?
```
one two three four five six seven eight
```
I have tried with nested for-loops but can't fig... | Assuming both arrays are the same size,
```
unset result
for (( i=0; i<${#array1[*]}; ++i)); do
result+=( "${array1[$i]}" "${array2[$i]}" )
done
``` |
18779762 | Iterating through key names from a PSCustomObject | 20 | 2013-09-13 06:37:50 | <p>I am writing a script for my site that utilizes a JSON configuration file. The JSON is similar to the following:</p>
<pre><code>"Groups": {
"GroupOne": {
"NamingFilter": {
"Not":"<SITE>-MJ*",
"Has":"*WM,*WT"
}
},
"GroupTwo": {
"NamingFilter": {
... | 38,815 | 860,857 | 2024-07-03 16:32:04 | 18,780,001 | 13 | 2013-09-13 06:51:43 | 860,857 | 2018-12-29 08:07:30 | https://stackoverflow.com/q/18779762 | https://stackoverflow.com/a/18780001 | <p>I think I might have just figured it out thanks to the blog post <em><a href="http://blogs.msdn.com/b/timid/archive/2013/03/05/converting-pscustomobject-to-from-hashtables.aspx" rel="noreferrer">Converting PsCustomObject To/From Hashtables</a></em>.</p>
<p>Using <code>Get-Member</code> and then <code>-MemberType</co... | <p>I think I might have just figured it out thanks to the blog post <em><a href="http://blogs.msdn.com/b/timid/archive/2013/03/05/converting-pscustomobject-to-from-hashtables.aspx" rel="noreferrer">Converting PsCustomObject To/From Hashtables</a></em>.</p> <p>Using <code>Get-Member</code> and then <code>-MemberType</co... | 24067, 37256 | object-graph, powershell-2.0 | <h1>Iterating through key names from a PSCustomObject</h1>
<p>I am writing a script for my site that utilizes a JSON configuration file. The JSON is similar to the following:</p>
<pre><code>"Groups": {
"GroupOne": {
"NamingFilter": {
"Not":"<SITE>-MJ*",
"Has":"*WM,*WT"
... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,096 | bash | # Iterating through key names from a PSCustomObject
I am writing a script for my site that utilizes a JSON configuration file. The JSON is similar to the following:
```
"Groups": {
"GroupOne": {
"NamingFilter": {
"Not":"<SITE>-MJ*",
"Has":"*WM,*WT"
}
},
"GroupTwo": ... | I think I might have just figured it out thanks to the blog post *[Converting PsCustomObject To/From Hashtables](http://blogs.msdn.com/b/timid/archive/2013/03/05/converting-pscustomobject-to-from-hashtables.aspx)*.
Using `Get-Member` and then `-MemberType` exposes each Group and then you just pull the:
```
foreach ($... |
11239466 | How to check whether a background job is alive? (bash) | 20 | 2012-06-28 06:55:50 | <p>I have the following bash script, we can call it <code>script1.sh</code>:</p>
<pre><code>#!/bin/bash
exec ./script2.sh &
sleep 5
if job1 is alive then #<--- this line is pseudo-code!
exec ./script3.sh &
wait
fi
</code></pre>
<p>As can be seen, the script executes <code>script2.sh</code> as a ... | 35,342 | 963,396 | 2020-07-23 06:01:07 | 11,239,622 | 13 | 2012-06-28 07:06:53 | 1,301,972 | 2012-06-28 07:06:53 | https://stackoverflow.com/q/11239466 | https://stackoverflow.com/a/11239622 | <p>You can get the PID of the most recent background job with <code>$!</code>. You could then check the exit status of <em>ps</em> to determine if that particular PID is still in the process list. For example:</p>
<pre><code>sleep 30 &
if ps -p $! >&-; then
wait $!
else
jobs
fi
</code></pre>
| <p>You can get the PID of the most recent background job with <code>$!</code>. You could then check the exit status of <em>ps</em> to determine if that particular PID is still in the process list. For example:</p> <pre><code>sleep 30 & if ps -p $! >&-; then wait $! else jobs fi </code></pre> | 387, 390, 955, 2827, 5910 | background, bash, jobs, process, shell | <h1>How to check whether a background job is alive? (bash)</h1>
<p>I have the following bash script, we can call it <code>script1.sh</code>:</p>
<pre><code>#!/bin/bash
exec ./script2.sh &
sleep 5
if job1 is alive then #<--- this line is pseudo-code!
exec ./script3.sh &
wait
fi
</code></pre>
<p>A... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,097 | bash | # How to check whether a background job is alive? (bash)
I have the following bash script, we can call it `script1.sh`:
```
#!/bin/bash
exec ./script2.sh &
sleep 5
if job1 is alive then #<--- this line is pseudo-code!
exec ./script3.sh &
wait
fi
```
As can be seen, the script executes `script2.sh` as a ba... | You can get the PID of the most recent background job with `$!`. You could then check the exit status of *ps* to determine if that particular PID is still in the process list. For example:
```
sleep 30 &
if ps -p $! >&-; then
wait $!
else
jobs
fi
``` |
11206233 | What does the "=~" operator do in shell scripts? | 20 | 2012-06-26 11:20:54 | <p>It seems that it is sort of comparison operator, but what exactly it does in e.g. the following code (taken from <a href="https://github.com/lvv/git-prompt/blob/master/git-prompt.sh#L154">https://github.com/lvv/git-prompt/blob/master/git-prompt.sh#L154</a>)?</p>
<pre><code> if [[ $LC_CTYPE =~ "UTF" && $T... | 27,248 | 831,314 | 2017-03-30 08:17:01 | 11,206,353 | 13 | 2012-06-26 11:27:52 | 385,571 | 2017-03-30 08:17:01 | https://stackoverflow.com/q/11206233 | https://stackoverflow.com/a/11206353 | <p>It's a bash-only addition to the built-in <code>[[</code> command, performing regexp matching. Since it doesn't have to be an exact match of the full string, the symbol is waved, to indicate an "inexact" match.</p>
<p>In this case, if <code>$LC_CTYPE</code> <em>CONTAINS</em> the string "UTF".</p>
<p>More portable ... | <p>It's a bash-only addition to the built-in <code>[[</code> command, performing regexp matching. Since it doesn't have to be an exact match of the full string, the symbol is waved, to indicate an "inexact" match.</p> <p>In this case, if <code>$LC_CTYPE</code> <em>CONTAINS</em> the string "UTF".</p> <p>More portable ... | 387, 390 | bash, shell | <h1>What does the "=~" operator do in shell scripts?</h1>
<p>It seems that it is sort of comparison operator, but what exactly it does in e.g. the following code (taken from <a href="https://github.com/lvv/git-prompt/blob/master/git-prompt.sh#L154">https://github.com/lvv/git-prompt/blob/master/git-prompt.sh#L154</a>)?<... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,098 | bash | # What does the "=~" operator do in shell scripts?
It seems that it is sort of comparison operator, but what exactly it does in e.g. the following code (taken from <https://github.com/lvv/git-prompt/blob/master/git-prompt.sh#L154>)?
```
if [[ $LC_CTYPE =~ "UTF" && $TERM != "linux" ]]; then
elipses_ma... | It's a bash-only addition to the built-in `[[` command, performing regexp matching. Since it doesn't have to be an exact match of the full string, the symbol is waved, to indicate an "inexact" match.
In this case, if `$LC_CTYPE` *CONTAINS* the string "UTF".
More portable version:
```
if test `echo $LC_CTYPE | grep -... |
31224368 | How do I escape a series of backslashes in a bash printf? | 19 | 2015-07-04 19:22:11 | <p>The following script yielded an unexpected output:</p>
<pre><code>printf "escaped slash: \\ \n"
printf "2 escaped slashes: \\\\ \n"
printf "3 escaped slashes: \\\\\\ \n"
printf "4 escaped slashes: \\\\\\\\ \n"
</code></pre>
<p>Run as a bash script under Ubuntu 14, I see:</p>
<pre><code>escaped slash: \
2 escaped ... | 46,268 | 1,335,245 | 2022-04-25 03:21:06 | 31,224,667 | 13 | 2015-07-04 20:00:48 | 2,381,750 | 2015-07-04 20:07:43 | https://stackoverflow.com/q/31224368 | https://stackoverflow.com/a/31224667 | <p>Assuming that <code>printf</code> <code>FORMAT</code> string is surrounded by double quotes, <code>printf</code> takes one additional level of expansion, compared to e.g. <code>echo</code> (both being shell builtin commands).</p>
<p>What you expect from <code>printf</code> can actually be achieved using single quot... | <p>Assuming that <code>printf</code> <code>FORMAT</code> string is surrounded by double quotes, <code>printf</code> takes one additional level of expansion, compared to e.g. <code>echo</code> (both being shell builtin commands).</p> <p>What you expect from <code>printf</code> can actually be achieved using single quot... | 139, 387, 4804, 17891 | backslash, bash, escaping, string | <h1>How do I escape a series of backslashes in a bash printf?</h1>
<p>The following script yielded an unexpected output:</p>
<pre><code>printf "escaped slash: \\ \n"
printf "2 escaped slashes: \\\\ \n"
printf "3 escaped slashes: \\\\\\ \n"
printf "4 escaped slashes: \\\\\\\\ \n"
</code></pre>
<p>Run as a bash script ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,099 | bash | # How do I escape a series of backslashes in a bash printf?
The following script yielded an unexpected output:
```
printf "escaped slash: \\ \n"
printf "2 escaped slashes: \\\\ \n"
printf "3 escaped slashes: \\\\\\ \n"
printf "4 escaped slashes: \\\\\\\\ \n"
```
Run as a bash script under Ubuntu 14, I see:
```
esca... | Assuming that `printf` `FORMAT` string is surrounded by double quotes, `printf` takes one additional level of expansion, compared to e.g. `echo` (both being shell builtin commands).
What you expect from `printf` can actually be achieved using single quotes:
```
printf '1 escaped slash: \\ \n'
printf '2 escaped slas... |
27590276 | "permission denied" while removing git directory | 19 | 2014-12-21 14:28:38 | <p>I'm trying to remove a .git directory while using win7 and git-bash. here's my attempt:</p>
<pre><code>$ rm -rf .git
rm: cannot remove directory `.git/objects/5e': Permission denied
rm: cannot remove directory `.git/objects': Directory not empty
rm: cannot remove directory `.git': Directory not empty
$ rmdir .... | 41,645 | 1,592,380 | 2023-01-14 17:43:38 | 27,590,363 | 13 | 2014-12-21 14:36:58 | 41,782 | 2014-12-21 14:36:58 | https://stackoverflow.com/q/27590276 | https://stackoverflow.com/a/27590363 | <p>Windows 7 - Git-bash</p>
<pre><code>$ sudo
sh.exe": sudo: command not found
</code></pre>
<p>git-bash in windows does not have sudo command. </p>
<p>Most probably, you used some git commands in command shell with elevated privileges. In windows 7 , your normal user and your user with elevated privileges have diff... | <p>Windows 7 - Git-bash</p> <pre><code>$ sudo sh.exe": sudo: command not found </code></pre> <p>git-bash in windows does not have sudo command. </p> <p>Most probably, you used some git commands in command shell with elevated privileges. In windows 7 , your normal user and your user with elevated privileges have diff... | 64, 119, 61874 | git, git-bash, windows | <h1>"permission denied" while removing git directory</h1>
<p>I'm trying to remove a .git directory while using win7 and git-bash. here's my attempt:</p>
<pre><code>$ rm -rf .git
rm: cannot remove directory `.git/objects/5e': Permission denied
rm: cannot remove directory `.git/objects': Directory not empty
rm: cannot r... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,100 | bash | # "permission denied" while removing git directory
I'm trying to remove a .git directory while using win7 and git-bash. here's my attempt:
```
$ rm -rf .git
rm: cannot remove directory `.git/objects/5e': Permission denied
rm: cannot remove directory `.git/objects': Directory not empty
rm: cannot remove directory `.gi... | Windows 7 - Git-bash
```
$ sudo
sh.exe": sudo: command not found
```
git-bash in windows does not have sudo command.
Most probably, you used some git commands in command shell with elevated privileges. In windows 7 , your normal user and your user with elevated privileges have different powers. Try to do one of the ... |
16197021 | How to Write-Verbose from Invoke-Command? | 19 | 2013-04-24 16:11:04 | <p>In powershell</p>
<p><code>Write-Verbose</code> and the <code>-Verbose</code> flag are used to provide verbose information when commands are run in verbose mode. I am running some scripts remotely and would like to capture the verbose output output. However, <code>Invoke-Command</code> seems to not capture the verb... | 11,688 | 5,056 | 2020-03-27 08:17:30 | 16,197,390 | 13 | 2013-04-24 16:31:04 | 574,168 | 2013-04-24 16:31:04 | https://stackoverflow.com/q/16197021 | https://stackoverflow.com/a/16197390 | <p>Try it this way:</p>
<pre><code>Invoke-Command -ComputerName MY-COMPUTERNAME {$VerbosePreference='Continue'; Write-Verbose "blah" }
</code></pre>
| <p>Try it this way:</p> <pre><code>Invoke-Command -ComputerName MY-COMPUTERNAME {$VerbosePreference='Continue'; Write-Verbose "blah" } </code></pre> | 526, 63177 | powershell, powershell-remoting | <h1>How to Write-Verbose from Invoke-Command?</h1>
<p>In powershell</p>
<p><code>Write-Verbose</code> and the <code>-Verbose</code> flag are used to provide verbose information when commands are run in verbose mode. I am running some scripts remotely and would like to capture the verbose output output. However, <code>... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,101 | bash | # How to Write-Verbose from Invoke-Command?
In powershell
`Write-Verbose` and the `-Verbose` flag are used to provide verbose information when commands are run in verbose mode. I am running some scripts remotely and would like to capture the verbose output output. However, `Invoke-Command` seems to not capture the ve... | Try it this way:
```
Invoke-Command -ComputerName MY-COMPUTERNAME {$VerbosePreference='Continue'; Write-Verbose "blah" }
``` |
2746707 | using bash: write bit representation of integer to file | 19 | 2010-04-30 18:18:12 | <p>I have a file with binary data and I need to replace a few bytes in a certain position. I've come up with the following to direct bash to the offset and show me that it found the place I want:</p>
<pre><code>dd bs=1 if=file iseek=24 conv=block cbs=2 | hexdump
</code></pre>
<p>Now, to use "file" as the output:</p>
... | 20,489 | 219,324 | 2023-04-06 23:04:32 | 2,746,789 | 13 | 2010-04-30 18:32:06 | 329,892 | 2014-03-01 12:07:55 | https://stackoverflow.com/q/2746707 | https://stackoverflow.com/a/2746789 | <p>You can use echo to emit specific bytes using hex or octal. For example:</p>
<pre><code>echo -n -e \\x30
</code></pre>
<p>will print ascii 0 (0x30) </p>
<p>(-n remove trailing newline)</p>
| <p>You can use echo to emit specific bytes using hex or octal. For example:</p> <pre><code>echo -n -e \\x30 </code></pre> <p>will print ascii 0 (0x30) </p> <p>(-n remove trailing newline)</p> | 34, 387, 4867, 5004 | bash, binaryfiles, stdout, unix | <h1>using bash: write bit representation of integer to file</h1>
<p>I have a file with binary data and I need to replace a few bytes in a certain position. I've come up with the following to direct bash to the offset and show me that it found the place I want:</p>
<pre><code>dd bs=1 if=file iseek=24 conv=block cbs=2 |... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,102 | bash | # using bash: write bit representation of integer to file
I have a file with binary data and I need to replace a few bytes in a certain position. I've come up with the following to direct bash to the offset and show me that it found the place I want:
```
dd bs=1 if=file iseek=24 conv=block cbs=2 | hexdump
```
Now, t... | You can use echo to emit specific bytes using hex or octal. For example:
```
echo -n -e \\x30
```
will print ascii 0 (0x30)
(-n remove trailing newline) |
1720673 | Parse xml in powershell | 19 | 2009-11-12 08:09:14 | <p>I have the following xml:</p>
<pre><code><?xml version="1.0" encoding="UTF-8"?>
<sections>
<section name="Options">
<item key="HLVersionControlWebServiceURL" value="http://www.personec.no/webservices/HLVersionControl/HLVersionControl.asmx" />
<item key="AltinnWebServiceURL" valu... | 30,645 | 82,834 | 2014-08-28 05:43:23 | 1,726,700 | 13 | 2009-11-13 02:12:02 | 153,982 | 2009-11-13 02:12:02 | https://stackoverflow.com/q/1720673 | https://stackoverflow.com/a/1726700 | <p>This version uses a bit more PowerShell and handles the case of mulitple items with WorkDir keys:</p>
<pre><code>$xml = [xml](Get-Content foo.xml)
$xpath = "/sections/section/item[@key='WorkDir']"
Microsoft.PowerShell.Utility\Select-Xml $xml -XPath $xpath |
Foreach {$_.Node.SetAttribute('value', $pwd)}
$xml.Sa... | <p>This version uses a bit more PowerShell and handles the case of mulitple items with WorkDir keys:</p> <pre><code>$xml = [xml](Get-Content foo.xml) $xpath = "/sections/section/item[@key='WorkDir']" Microsoft.PowerShell.Utility\Select-Xml $xml -XPath $xpath | Foreach {$_.Node.SetAttribute('value', $pwd)} $xml.Sa... | 19, 526 | powershell, xml | <h1>Parse xml in powershell</h1>
<p>I have the following xml:</p>
<pre><code><?xml version="1.0" encoding="UTF-8"?>
<sections>
<section name="Options">
<item key="HLVersionControlWebServiceURL" value="http://www.personec.no/webservices/HLVersionControl/HLVersionControl.asmx" />
<it... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,103 | bash | # Parse xml in powershell
I have the following xml:
```
<?xml version="1.0" encoding="UTF-8"?>
<sections>
<section name="Options">
<item key="HLVersionControlWebServiceURL" value="http://www.personec.no/webservices/HLVersionControl/HLVersionControl.asmx" />
<item key="AltinnWebServiceURL" value="https://www... | This version uses a bit more PowerShell and handles the case of mulitple items with WorkDir keys:
```
$xml = [xml](Get-Content foo.xml)
$xpath = "/sections/section/item[@key='WorkDir']"
Microsoft.PowerShell.Utility\Select-Xml $xml -XPath $xpath |
Foreach {$_.Node.SetAttribute('value', $pwd)}
$xml.Save("$pwd\bar.x... |
71514564 | Git : reload .gitconfig file from the bash console | 18 | 2022-03-17 15:01:19 | <p>I want to quickly test my changes in my user <code>.gitconfig</code> file without closing and reopening the console. Is there a way to load it again, much like <code>source .bashrc</code> would reload the bash config ?</p>
<p>EDIT : <code>source ~/.gitconfig</code> didn't work, not that this surprises me, but just s... | 24,129 | 1,419,127 | 2024-02-28 16:43:58 | 78,076,213 | 13 | 2024-02-28 16:43:58 | 1,019,234 | 2024-02-28 16:43:58 | https://stackoverflow.com/q/71514564 | https://stackoverflow.com/a/78076213 | <p>Git automatically reads the <code>.gitconfig</code> file each time you run a Git command. Therefore, any changes you make to the file will take effect immediately without needing to reload or restart anything. Just save your changes, and the next time you run a Git command, the updated configuration will be used.</p... | <p>Git automatically reads the <code>.gitconfig</code> file each time you run a Git command. Therefore, any changes you make to the file will take effect immediately without needing to reload or restart anything. Just save your changes, and the next time you run a Git command, the updated configuration will be used.</p... | 119, 387, 488, 32868, 61874 | bash, console, git, git-bash, git-config | <h1>Git : reload .gitconfig file from the bash console</h1>
<p>I want to quickly test my changes in my user <code>.gitconfig</code> file without closing and reopening the console. Is there a way to load it again, much like <code>source .bashrc</code> would reload the bash config ?</p>
<p>EDIT : <code>source ~/.gitconfi... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,104 | bash | # Git : reload .gitconfig file from the bash console
I want to quickly test my changes in my user `.gitconfig` file without closing and reopening the console. Is there a way to load it again, much like `source .bashrc` would reload the bash config ?
EDIT : `source ~/.gitconfig` didn't work, not that this surprises me... | Git automatically reads the `.gitconfig` file each time you run a Git command. Therefore, any changes you make to the file will take effect immediately without needing to reload or restart anything. Just save your changes, and the next time you run a Git command, the updated configuration will be used. |
56589188 | Test postgresql connection string using psql at bash command line? | 18 | 2019-06-13 22:14:40 | <p>If I have a postgresql connection string:</p>
<pre><code>export my_conn='postgresql://vadmin:Gimme5br@platform-prod.clfk51eo.us-west-2.rds.amazonaws.com/prod'
</code></pre>
<p>how can I test this connection? I tried:</p>
<pre><code>pqsl "$my_conn"
</code></pre>
<p>and it just hangs</p>
| 27,684 | null | 2020-03-19 23:51:22 | 56,592,545 | 13 | 2019-06-14 06:24:25 | 6,464,308 | 2019-06-14 06:24:25 | https://stackoverflow.com/q/56589188 | https://stackoverflow.com/a/56592545 | <p>The best tool for the purpose is <a href="https://www.postgresql.org/docs/current/app-pg-isready.html" rel="noreferrer"><code>pg_isready</code></a>.</p>
<p>Simply run</p>
<pre><code>pg_isready -d "$my_conn"
</code></pre>
<p>and check the return code.</p>
| <p>The best tool for the purpose is <a href="https://www.postgresql.org/docs/current/app-pg-isready.html" rel="noreferrer"><code>pg_isready</code></a>.</p> <p>Simply run</p> <pre><code>pg_isready -d "$my_conn" </code></pre> <p>and check the return code.</p> | 256, 387, 390, 82549 | bash, postgresql, psql, shell | <h1>Test postgresql connection string using psql at bash command line?</h1>
<p>If I have a postgresql connection string:</p>
<pre><code>export my_conn='postgresql://vadmin:Gimme5br@platform-prod.clfk51eo.us-west-2.rds.amazonaws.com/prod'
</code></pre>
<p>how can I test this connection? I tried:</p>
<pre><code>pqsl "... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,105 | bash | # Test postgresql connection string using psql at bash command line?
If I have a postgresql connection string:
```
export my_conn='postgresql://vadmin:Gimme5br@platform-prod.clfk51eo.us-west-2.rds.amazonaws.com/prod'
```
how can I test this connection? I tried:
```
pqsl "$my_conn"
```
and it just hangs | The best tool for the purpose is [`pg_isready`](https://www.postgresql.org/docs/current/app-pg-isready.html).
Simply run
```
pg_isready -d "$my_conn"
```
and check the return code. |
38519643 | Failed to load native library 'libnative-platform.so' for Linux amd64 | 18 | 2016-07-22 06:30:13 | <p>First off, if this belongs on Ask Ubuntu, my apologies...I'm not really sure what forum this falls under.</p>
<p>I'm attempting to fork and build an Android project from Github using PHP and a shell script. Basically, I'm printing out some output from a shell script I wrote into a website. When you visit the page, ... | 32,533 | 2,844,992 | 2022-10-25 22:47:51 | 38,558,668 | 13 | 2016-07-25 01:50:19 | 706,466 | 2016-07-25 01:54:10 | https://stackoverflow.com/q/38519643 | https://stackoverflow.com/a/38558668 | <p>If forking and building script working fine when is executed under your user account in the terminal then a problem is most likely with environment variables and files permissions. </p>
<p>1 <strong>It could be that path defined in GRADLE_USER_HOME is not writable by www-data user</strong>. To change home dir you ... | <p>If forking and building script working fine when is executed under your user account in the terminal then a problem is most likely with environment variables and files permissions. </p> <p>1 <strong>It could be that path defined in GRADLE_USER_HOME is not writable by www-data user</strong>. To change home dir you ... | 5, 390, 549, 1386, 32307 | android, gradle, php, shell, ubuntu | <h1>Failed to load native library 'libnative-platform.so' for Linux amd64</h1>
<p>First off, if this belongs on Ask Ubuntu, my apologies...I'm not really sure what forum this falls under.</p>
<p>I'm attempting to fork and build an Android project from Github using PHP and a shell script. Basically, I'm printing out so... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,106 | bash | # Failed to load native library 'libnative-platform.so' for Linux amd64
First off, if this belongs on Ask Ubuntu, my apologies...I'm not really sure what forum this falls under.
I'm attempting to fork and build an Android project from Github using PHP and a shell script. Basically, I'm printing out some output from a... | If forking and building script working fine when is executed under your user account in the terminal then a problem is most likely with environment variables and files permissions.
1 **It could be that path defined in GRADLE_USER_HOME is not writable by www-data user**. To change home dir you could execute `gradle -g ... |
31537204 | Execute several .sql files in a single transaction using PostgreSQL and bash | 18 | 2015-07-21 10:59:25 | <p>Say I have the files:</p>
<pre><code>file1.sql
file2.sql
file3.sql
</code></pre>
<p>I need all three files to be executed in a single transaction. I'm looking for a bash script like:</p>
<pre><code>psql -h hostname -U username dbname -c "
begin;
\i file1.sql
\i file2.sql
\i file3.sql
commit;"
</code></pre>
<p>Th... | 20,362 | 2,728,797 | 2019-06-29 19:27:22 | 31,537,928 | 13 | 2015-07-21 11:34:21 | 2,235,885 | 2015-07-21 11:34:21 | https://stackoverflow.com/q/31537204 | https://stackoverflow.com/a/31537928 | <p>Either use a sub-shell:</p>
<pre><code>#!/bin/sh
(echo "BEGIN;"; cat file1.sql; cat file2.sql; echo "COMMIT;") \
| psql -U the_user the_database
#eof
</code></pre>
<p>or use a here-document:</p>
<pre><code>#!/bin/sh
psql -U the_user the_database <<OMG
BEGIN;
\i file1.sql
\i file2.sql
COMMIT;
OMG
#eof... | <p>Either use a sub-shell:</p> <pre><code>#!/bin/sh (echo "BEGIN;"; cat file1.sql; cat file2.sql; echo "COMMIT;") \ | psql -U the_user the_database #eof </code></pre> <p>or use a here-document:</p> <pre><code>#!/bin/sh psql -U the_user the_database <<OMG BEGIN; \i file1.sql \i file2.sql COMMIT; OMG #eof... | 256, 387, 3550 | bash, postgresql, transactions | <h1>Execute several .sql files in a single transaction using PostgreSQL and bash</h1>
<p>Say I have the files:</p>
<pre><code>file1.sql
file2.sql
file3.sql
</code></pre>
<p>I need all three files to be executed in a single transaction. I'm looking for a bash script like:</p>
<pre><code>psql -h hostname -U username d... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,107 | bash | # Execute several .sql files in a single transaction using PostgreSQL and bash
Say I have the files:
```
file1.sql
file2.sql
file3.sql
```
I need all three files to be executed in a single transaction. I'm looking for a bash script like:
```
psql -h hostname -U username dbname -c "
begin;
\i file1.sql
\i file2.sql
... | Either use a sub-shell:
```
#!/bin/sh
(echo "BEGIN;"; cat file1.sql; cat file2.sql; echo "COMMIT;") \
| psql -U the_user the_database
#eof
```
or use a here-document:
```
#!/bin/sh
psql -U the_user the_database <<OMG
BEGIN;
\i file1.sql
\i file2.sql
COMMIT;
OMG
#eof
```
NOTE: in HERE-documents there will be ... |
19619490 | How to read stdin when no arguments are passed? | 18 | 2013-10-27 14:59:46 | <p>Script doesn't work when I want to use standard input when there are no arguments (files) passed. Is there any way how to use stdin instead of a file in this code?</p>
<p>I tried this:</p>
<pre><code>if [ ! -n $1 ] # check if argument exists
then
$1=$(</dev/stdin) # if not use stdin as an argument
fi
... | 14,070 | 2,203,012 | 2015-07-24 05:31:56 | 19,619,634 | 13 | 2013-10-27 15:15:22 | 132,382 | 2015-02-28 21:29:55 | https://stackoverflow.com/q/19619490 | https://stackoverflow.com/a/19619634 | <p>Just substitute bash's specially interpreted <code>/dev/stdin</code> as the filename:</p>
<pre><code>VAR=$1
while read blah; do
...
done < "${VAR:-/dev/stdin}"
</code></pre>
<p>(Note that bash will actually use that special <em>file</em> <code>/dev/stdin</code> <a href="https://unix.stackexchange.com/a/38580/... | <p>Just substitute bash's specially interpreted <code>/dev/stdin</code> as the filename:</p> <pre><code>VAR=$1 while read blah; do ... done < "${VAR:-/dev/stdin}" </code></pre> <p>(Note that bash will actually use that special <em>file</em> <code>/dev/stdin</code> <a href="https://unix.stackexchange.com/a/38580/... | 387, 1701 | bash, stdin | <h1>How to read stdin when no arguments are passed?</h1>
<p>Script doesn't work when I want to use standard input when there are no arguments (files) passed. Is there any way how to use stdin instead of a file in this code?</p>
<p>I tried this:</p>
<pre><code>if [ ! -n $1 ] # check if argument exists
then
$1=$(... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,108 | bash | # How to read stdin when no arguments are passed?
Script doesn't work when I want to use standard input when there are no arguments (files) passed. Is there any way how to use stdin instead of a file in this code?
I tried this:
```
if [ ! -n $1 ] # check if argument exists
then
$1=$(</dev/stdin) # if not use ... | Just substitute bash's specially interpreted `/dev/stdin` as the filename:
```
VAR=$1
while read blah; do
...
done < "${VAR:-/dev/stdin}"
```
(Note that bash will actually use that special *file* `/dev/stdin` [if built for an OS that offers it](https://unix.stackexchange.com/a/38580/7703), but since bash 2.04 will ... |
9554544 | Python, running command line tools in parallel | 18 | 2012-03-04 11:35:47 | <p>I am using Python as a script language to do some data processing and call command-line tools for number crunching. I wish to run command-line tools in parallel since they are independent with each other. When one command-line tool is finished, I can collect its results from the output file. So I also need some sync... | 35,847 | 183,828 | 2019-01-08 09:46:08 | 9,555,046 | 13 | 2012-03-04 13:00:14 | 1,219,295 | 2012-11-08 07:31:54 | https://stackoverflow.com/q/9554544 | https://stackoverflow.com/a/9555046 | <p>Use the <code>Pool</code> object from the <code>multiprocessing</code> module. You can then use e.g. <code>Pool.map()</code> to do parallel processing. An example would be my markphotos script (see below), where a function is called multiple times in parallel to each process a picture.</p>
<pre><code>#! /usr/bin/en... | <p>Use the <code>Pool</code> object from the <code>multiprocessing</code> module. You can then use e.g. <code>Pool.map()</code> to do parallel processing. An example would be my markphotos script (see below), where a function is called multiple times in parallel to each process a picture.</p> <pre><code>#! /usr/bin/en... | 16, 353, 390, 1231 | command-line, parallel-processing, python, shell | <h1>Python, running command line tools in parallel</h1>
<p>I am using Python as a script language to do some data processing and call command-line tools for number crunching. I wish to run command-line tools in parallel since they are independent with each other. When one command-line tool is finished, I can collect it... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,109 | bash | # Python, running command line tools in parallel
I am using Python as a script language to do some data processing and call command-line tools for number crunching. I wish to run command-line tools in parallel since they are independent with each other. When one command-line tool is finished, I can collect its results... | Use the `Pool` object from the `multiprocessing` module. You can then use e.g. `Pool.map()` to do parallel processing. An example would be my markphotos script (see below), where a function is called multiple times in parallel to each process a picture.
```
#! /usr/bin/env python
# -*- coding: utf-8 -*-
# Adds my copy... |
5530522 | Provide a .NET method as a delegate callback | 18 | 2011-04-03 15:30:04 | <p>What is the syntax to pass .NET method as a delegate callback to a .NET object in PowerShell.</p>
<p>For example:</p>
<p>C#:</p>
<pre><code>public class Class1
{
public static void MyMethod(Action<object> obj)
{
obj("Hey!");
}
}
public class Class2
{
public static void Callback(obj... | 4,991 | 13,688 | 2012-09-02 00:01:15 | 5,531,492 | 13 | 2011-04-03 18:14:23 | 110,865 | 2011-04-03 18:14:23 | https://stackoverflow.com/q/5530522 | https://stackoverflow.com/a/5531492 | <p>Working code via Adam's and Oisin's chat.</p>
<pre><code>Add-Type -Language CSharpVersion3 -TypeDefinition @"
using System;
public class Class1
{
public static void MyMethod(Action<object> obj)
{
obj("Hey!");
}
}
public class Class2
{
public static void Callback(object obj)
{
... | <p>Working code via Adam's and Oisin's chat.</p> <pre><code>Add-Type -Language CSharpVersion3 -TypeDefinition @" using System; public class Class1 { public static void MyMethod(Action<object> obj) { obj("Hey!"); } } public class Class2 { public static void Callback(object obj) { ... | 1, 9, 526, 1533, 24067 | .net, c#, delegates, powershell, powershell-2.0 | <h1>Provide a .NET method as a delegate callback</h1>
<p>What is the syntax to pass .NET method as a delegate callback to a .NET object in PowerShell.</p>
<p>For example:</p>
<p>C#:</p>
<pre><code>public class Class1
{
public static void MyMethod(Action<object> obj)
{
obj("Hey!");
}
}
pub... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,110 | bash | # Provide a .NET method as a delegate callback
What is the syntax to pass .NET method as a delegate callback to a .NET object in PowerShell.
For example:
C#:
```
public class Class1
{
public static void MyMethod(Action<object> obj)
{
obj("Hey!");
}
}
public class Class2
{
public static voi... | Working code via Adam's and Oisin's chat.
```
Add-Type -Language CSharpVersion3 -TypeDefinition @"
using System;
public class Class1
{
public static void MyMethod(Action<object> obj)
{
obj("Hey!");
}
}
public class Class2
{
public static void Callback(object obj)
{
Console.Write... |
43260052 | Bash move * to subfolder fail: cannot move to a subdirectory of itself | 17 | 2017-04-06 15:51:36 | <p>I have a folder with several files that I want to move to a subfolder:</p>
<pre><code>mkdir subfolder
mv ./* subfolder
</code></pre>
<p>But when I do this, I get: </p>
<p><code>mv: cannot move 'subfolder' to a subdirectory of itself</code></p>
<p>How can I simply avoid this?</p>
| 28,376 | 1,620,081 | 2021-07-25 12:05:42 | 43,260,121 | 13 | 2017-04-06 15:54:24 | 548,225 | 2017-04-06 15:54:24 | https://stackoverflow.com/q/43260052 | https://stackoverflow.com/a/43260121 | <p>Using <code>extglob</code> you can do this:</p>
<pre><code>shopt -s extglob
mv !(subfolder) subfolder
</code></pre>
<p>Glob expression <code>!(subfolder)</code> will match everything except <code>subfolder</code>.</p>
| <p>Using <code>extglob</code> you can do this:</p> <pre><code>shopt -s extglob mv !(subfolder) subfolder </code></pre> <p>Glob expression <code>!(subfolder)</code> will match everything except <code>subfolder</code>.</p> | 387 | bash | <h1>Bash move * to subfolder fail: cannot move to a subdirectory of itself</h1>
<p>I have a folder with several files that I want to move to a subfolder:</p>
<pre><code>mkdir subfolder
mv ./* subfolder
</code></pre>
<p>But when I do this, I get: </p>
<p><code>mv: cannot move 'subfolder' to a subdirectory of itself</... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,111 | bash | # Bash move * to subfolder fail: cannot move to a subdirectory of itself
I have a folder with several files that I want to move to a subfolder:
```
mkdir subfolder
mv ./* subfolder
```
But when I do this, I get:
`mv: cannot move 'subfolder' to a subdirectory of itself`
How can I simply avoid this? | Using `extglob` you can do this:
```
shopt -s extglob
mv !(subfolder) subfolder
```
Glob expression `!(subfolder)` will match everything except `subfolder`. |
26464103 | How to export env variable in node.js | 17 | 2014-10-20 11:04:15 | <p>I like my <code>node.js</code> so much, that I want to use it is my <code>bash</code> start up script <code>~/.bashrc</code>, but I do not know how to export variable.</p>
<p>Currently I have to use this approach:</p>
<pre><code>export PS1=`node ~/PS1.js`
export PS2=`node ~/PS2.js`
export PATH=`node ~/PATH.js`
</c... | 30,732 | 1,968,972 | 2025-11-17 17:27:44 | 26,464,645 | 13 | 2014-10-20 11:32:00 | 1,195,752 | 2014-10-21 05:28:20 | https://stackoverflow.com/q/26464103 | https://stackoverflow.com/a/26464645 | <p>Node.js will run in an separate process which gets a copy of the environment. You cannot change the environment of you parent process (the one executing .bashrc).</p>
<p>But the following question has an answer for you:
<a href="https://stackoverflow.com/questions/496702/can-a-shell-script-set-environment-variables... | <p>Node.js will run in an separate process which gets a copy of the environment. You cannot change the environment of you parent process (the one executing .bashrc).</p> <p>But the following question has an answer for you: <a href="https://stackoverflow.com/questions/496702/can-a-shell-script-set-environment-variables... | 3, 387, 9013, 46426 | bash, environment-variables, javascript, node.js | <h1>How to export env variable in node.js</h1>
<p>I like my <code>node.js</code> so much, that I want to use it is my <code>bash</code> start up script <code>~/.bashrc</code>, but I do not know how to export variable.</p>
<p>Currently I have to use this approach:</p>
<pre><code>export PS1=`node ~/PS1.js`
export PS2=`... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,112 | bash | # How to export env variable in node.js
I like my `node.js` so much, that I want to use it is my `bash` start up script `~/.bashrc`, but I do not know how to export variable.
Currently I have to use this approach:
```
export PS1=`node ~/PS1.js`
export PS2=`node ~/PS2.js`
export PATH=`node ~/PATH.js`
```
instead I w... | Node.js will run in an separate process which gets a copy of the environment. You cannot change the environment of you parent process (the one executing .bashrc).
But the following question has an answer for you:
[Can a shell script set environment variables of the calling shell?](https://stackoverflow.com/questions/4... |
23417755 | Simulate a crashing bash script | 17 | 2014-05-01 22:30:03 | <p>I'm trying to test a bash script that restarts it's child process when the child process has crashed.<br>
How do I make a bash script crash on purpose? </p>
<p>(I'm trying to test the script that restarts the process)</p>
| 9,552 | 155,638 | 2017-05-22 23:00:16 | 23,418,012 | 13 | 2014-05-01 22:50:52 | 3,030,305 | 2014-05-01 22:50:52 | https://stackoverflow.com/q/23417755 | https://stackoverflow.com/a/23418012 | <p>To exit a script while signaling an error, use:</p>
<pre><code>exit 1
</code></pre>
<p>That exits with exit code <code>1</code>, indicating failure. Other non-zero numbers can be used to signal different failure conditions. <code>exit 0</code> signals success.</p>
<p>To throw an exception, use <code>kill</code>... | <p>To exit a script while signaling an error, use:</p> <pre><code>exit 1 </code></pre> <p>That exits with exit code <code>1</code>, indicating failure. Other non-zero numbers can be used to signal different failure conditions. <code>exit 0</code> signals success.</p> <p>To throw an exception, use <code>kill</code>... | 387, 5142 | bash, exception | <h1>Simulate a crashing bash script</h1>
<p>I'm trying to test a bash script that restarts it's child process when the child process has crashed.<br>
How do I make a bash script crash on purpose? </p>
<p>(I'm trying to test the script that restarts the process)</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,113 | bash | # Simulate a crashing bash script
I'm trying to test a bash script that restarts it's child process when the child process has crashed.
How do I make a bash script crash on purpose?
(I'm trying to test the script that restarts the process) | To exit a script while signaling an error, use:
```
exit 1
```
That exits with exit code `1`, indicating failure. Other non-zero numbers can be used to signal different failure conditions. `exit 0` signals success.
To throw an exception, use `kill`. To issue the hangup signal, for example, from within a script, run:... |
15897276 | Extracting part of a string to a variable in bash | 17 | 2013-04-09 08:45:43 | <p>noob here, sorry if a repost. I am extracting a string from a file, and end up with a line, something like:</p>
<pre><code>abcdefg:12345:67890:abcde:12345:abcde
</code></pre>
<p>Let's say it's in a variable named testString
the length of the values between the colons is not constant, but I want to save the number,... | 62,051 | 2,260,834 | 2013-04-09 16:18:06 | 15,904,021 | 13 | 2013-04-09 14:01:18 | 2,005,672 | 2013-04-09 14:12:48 | https://stackoverflow.com/q/15897276 | https://stackoverflow.com/a/15904021 | <p>Here's another pure bash way. Works fine when your input is reasonably consistent and you don't need much flexibility in which section you pick out.</p>
<pre><code>extractedNum="${testString#*:}" # Remove through first :
extractedNum="${extractedNum#*:}" # Remove through second :
extractedNum="${extractedNum%... | <p>Here's another pure bash way. Works fine when your input is reasonably consistent and you don't need much flexibility in which section you pick out.</p> <pre><code>extractedNum="${testString#*:}" # Remove through first : extractedNum="${extractedNum#*:}" # Remove through second : extractedNum="${extractedNum%... | 139, 387, 5282, 5352, 10193 | bash, extract, find, sed, string | <h1>Extracting part of a string to a variable in bash</h1>
<p>noob here, sorry if a repost. I am extracting a string from a file, and end up with a line, something like:</p>
<pre><code>abcdefg:12345:67890:abcde:12345:abcde
</code></pre>
<p>Let's say it's in a variable named testString
the length of the values between... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,114 | bash | # Extracting part of a string to a variable in bash
noob here, sorry if a repost. I am extracting a string from a file, and end up with a line, something like:
```
abcdefg:12345:67890:abcde:12345:abcde
```
Let's say it's in a variable named testString
the length of the values between the colons is not constant, but ... | Here's another pure bash way. Works fine when your input is reasonably consistent and you don't need much flexibility in which section you pick out.
```
extractedNum="${testString#*:}" # Remove through first :
extractedNum="${extractedNum#*:}" # Remove through second :
extractedNum="${extractedNum%%:*}" # Remov... |
13381746 | tr [:upper:] [:lower:] with Cyrillic text | 17 | 2012-11-14 15:25:07 | <p>I'm trying to extract a word list from a Russian short story.</p>
<pre><code>#!/bin/sh
export LC_ALL=ru_RU.utf8
sed -re 's/\s+/\n/g' | \
sed 's/[\.!,—()«»;:?]//g' | \
tr '[:upper:]' '[:lower:]' | \
sort | uniq
</code></pre>
<p>However the <code>tr</code> step is not lowercasing the Cyrillic capital letters. I th... | 23,701 | 7,512 | 2021-05-19 10:29:41 | 13,383,175 | 13 | 2012-11-14 16:40:14 | 1,258,041 | 2012-11-14 16:56:39 | https://stackoverflow.com/q/13381746 | https://stackoverflow.com/a/13383175 | <p>This is what I found at <a href="http://en.wikipedia.org/wiki/Tr_%28Unix%29" rel="noreferrer">Wikipedia</a> (without any reference, though):</p>
<blockquote>
<p>Most versions of <code>tr</code>, including <code>GNU tr</code> and classic Unix <code>tr</code>, operate on single-byte characters and are not Unicode c... | <p>This is what I found at <a href="http://en.wikipedia.org/wiki/Tr_%28Unix%29" rel="noreferrer">Wikipedia</a> (without any reference, though):</p> <blockquote> <p>Most versions of <code>tr</code>, including <code>GNU tr</code> and classic Unix <code>tr</code>, operate on single-byte characters and are not Unicode c... | 279, 390, 18990 | shell, tr, unicode | <h1>tr [:upper:] [:lower:] with Cyrillic text</h1>
<p>I'm trying to extract a word list from a Russian short story.</p>
<pre><code>#!/bin/sh
export LC_ALL=ru_RU.utf8
sed -re 's/\s+/\n/g' | \
sed 's/[\.!,—()«»;:?]//g' | \
tr '[:upper:]' '[:lower:]' | \
sort | uniq
</code></pre>
<p>However the <code>tr</code> step is... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,115 | bash | # tr [:upper:] [:lower:] with Cyrillic text
I'm trying to extract a word list from a Russian short story.
```
#!/bin/sh
export LC_ALL=ru_RU.utf8
sed -re 's/\s+/\n/g' | \
sed 's/[\.!,—()«»;:?]//g' | \
tr '[:upper:]' '[:lower:]' | \
sort | uniq
```
However the `tr` step is not lowercasing the Cyrillic capital letter... | This is what I found at [Wikipedia](http://en.wikipedia.org/wiki/Tr_%28Unix%29) (without any reference, though):
> Most versions of `tr`, including `GNU tr` and classic Unix `tr`, operate on single-byte characters and are not Unicode compliant. An exception is the [Heirloom Toolchest](http://en.wikipedia.org/wiki/Heir... |
10620507 | How can I get powershell to return the correct exit code when called with the -File argument? | 17 | 2012-05-16 14:17:24 | <p>Powershell is returning a 0 exit code, when an error has occurred, if called with the -File argument. Which means my build is green when it shouldn't be :(</p>
<p>For example:</p>
<p>(in wtf.ps1) </p>
<pre><code>$ErrorActionPreference = "Stop";
$null.split()
</code></pre>
<p>(cmd) </p>
<pre><code>powershel... | 18,981 | 275,095 | 2017-05-17 18:50:23 | 10,620,837 | 13 | 2012-05-16 14:35:57 | 9,833 | 2012-05-16 15:19:16 | https://stackoverflow.com/q/10620507 | https://stackoverflow.com/a/10620837 | <p>In the script, use the exit keyword with a number of your choice:</p>
<pre><code>exit 34
</code></pre>
<p>Here's the script I used to test this:</p>
<pre><code>## D:\Scripts\Temp\exit.ps1 ##
try{
$null.split()
}
catch
{
exit 34
}
exit 2
#############################
# launch powershell from cmd
C:\>... | <p>In the script, use the exit keyword with a number of your choice:</p> <pre><code>exit 34 </code></pre> <p>Here's the script I used to test this:</p> <pre><code>## D:\Scripts\Temp\exit.ps1 ## try{ $null.split() } catch { exit 34 } exit 2 ############################# # launch powershell from cmd C:\>... | 526, 10021 | exit-code, powershell | <h1>How can I get powershell to return the correct exit code when called with the -File argument?</h1>
<p>Powershell is returning a 0 exit code, when an error has occurred, if called with the -File argument. Which means my build is green when it shouldn't be :(</p>
<p>For example:</p>
<p>(in wtf.ps1) </p>
<pre><cod... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,116 | bash | # How can I get powershell to return the correct exit code when called with the -File argument?
Powershell is returning a 0 exit code, when an error has occurred, if called with the -File argument. Which means my build is green when it shouldn't be :(
For example:
(in wtf.ps1)
```
$ErrorActionPreference = "Stop"; ... | In the script, use the exit keyword with a number of your choice:
```
exit 34
```
Here's the script I used to test this:
```
## D:\Scripts\Temp\exit.ps1 ##
try{
$null.split()
}
catch
{
exit 34
}
exit 2
#############################
# launch powershell from cmd
C:\> powershell -noprofile -file D:\Scripts\T... |
7824946 | How to enable User Account SMB sharing from terminal on Mac OS X? | 17 | 2011-10-08 20:16:39 | <p>I'm trying to enable <strong>Account Sharing</strong> from terminal. I can't figure out how to do that.</p>
<p>This will be used from inside an application I'm currently programming. The application creates a hidden user, then should enable SMB sharing for this user. Later, I need to connect to this share via anoth... | 10,867 | 963,718 | 2016-03-04 07:42:28 | 7,841,485 | 13 | 2011-10-20 19:55:32 | 963,718 | 2011-10-21 11:37:52 | https://stackoverflow.com/q/7824946 | https://stackoverflow.com/a/7841485 | <p><strong>THIS WORKS FOR OS X 10.5, 10.6, 10.7</strong></p>
<p>First type this in terminal</p>
<pre><code>pwpolicy -u SomeUser -sethashtypes SMB-NT on
</code></pre>
<p><code>SomeUser</code> can also be hidden, it doesn't matter. This gives the same effect like enabling that checkbox as shown in the picture above.</... | <p><strong>THIS WORKS FOR OS X 10.5, 10.6, 10.7</strong></p> <p>First type this in terminal</p> <pre><code>pwpolicy -u SomeUser -sethashtypes SMB-NT on </code></pre> <p><code>SomeUser</code> can also be hidden, it doesn't matter. This gives the same effect like enabling that checkbox as shown in the picture above.</... | 369, 387, 391, 994 | bash, cocoa, macos, terminal | <h1>How to enable User Account SMB sharing from terminal on Mac OS X?</h1>
<p>I'm trying to enable <strong>Account Sharing</strong> from terminal. I can't figure out how to do that.</p>
<p>This will be used from inside an application I'm currently programming. The application creates a hidden user, then should enable ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,117 | bash | # How to enable User Account SMB sharing from terminal on Mac OS X?
I'm trying to enable **Account Sharing** from terminal. I can't figure out how to do that.
This will be used from inside an application I'm currently programming. The application creates a hidden user, then should enable SMB sharing for this user. La... | **THIS WORKS FOR OS X 10.5, 10.6, 10.7**
First type this in terminal
```
pwpolicy -u SomeUser -sethashtypes SMB-NT on
```
`SomeUser` can also be hidden, it doesn't matter. This gives the same effect like enabling that checkbox as shown in the picture above.
After that:
```
dscl . -passwd /Users/SomeUser "UserPassw... |
7136899 | How does grep work? | 17 | 2011-08-21 07:04:38 | <p>I am trying to understand how <code>grep</code> works. </p>
<p>When I say <code>grep "hello" *.*</code>, does <code>grep</code> get 2 arguments — (1) string to be searched i.e. "hello" and (2) path <code>*.*</code>? Or does the shell convert <code>*.*</code> into something that <code>grep</code> can understan... | 20,800 | 358,892 | 2014-11-04 21:16:15 | 7,136,917 | 13 | 2011-08-21 07:10:39 | 200,291 | 2011-08-21 07:10:39 | https://stackoverflow.com/q/7136899 | https://stackoverflow.com/a/7136917 | <p>The shell does the globbing (conversion from <code>*</code> form to filenames). You can see this by if you have a simple C program:</p>
<pre><code>#include <stdio.h>
int main(int argc, char **argv) {
for(int i=1; i<argc; i++) {
printf("%s\n", argv[i]);
}
return 0;
}
</code></pre>
<p>A... | <p>The shell does the globbing (conversion from <code>*</code> form to filenames). You can see this by if you have a simple C program:</p> <pre><code>#include <stdio.h> int main(int argc, char **argv) { for(int i=1; i<argc; i++) { printf("%s\n", argv[i]); } return 0; } </code></pre> <p>A... | 8, 34, 390, 1271, 4072 | c, gnu, grep, shell, unix | <h1>How does grep work?</h1>
<p>I am trying to understand how <code>grep</code> works. </p>
<p>When I say <code>grep "hello" *.*</code>, does <code>grep</code> get 2 arguments — (1) string to be searched i.e. "hello" and (2) path <code>*.*</code>? Or does the shell convert <code>*.*</code> into something that <c... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,118 | bash | # How does grep work?
I am trying to understand how `grep` works.
When I say `grep "hello" *.*`, does `grep` get 2 arguments — (1) string to be searched i.e. "hello" and (2) path `*.*`? Or does the shell convert `*.*` into something that `grep` can understand?
Where can I get source code of `grep`? I came across thi... | The shell does the globbing (conversion from `*` form to filenames). You can see this by if you have a simple C program:
```
#include <stdio.h>
int main(int argc, char **argv) {
for(int i=1; i<argc; i++) {
printf("%s\n", argv[i]);
}
return 0;
}
```
And then run it like this:
```
./print_args *
`... |
1176386 | Automatically timing every executed command and show in Bash prompt? | 17 | 2009-07-24 08:21:52 | <p>I often happen to forget to explicitly prefix executions with the "time" command, ideally I would see in the next shell prompt how much real time the last command took (on every command).</p>
<p>I already scoured through the bash documentation, but couldn't find anything related.</p>
| 9,594 | 47,573 | 2010-04-28 21:23:11 | 1,177,511 | 13 | 2009-07-24 13:06:05 | 26,428 | 2009-07-24 13:06:05 | https://stackoverflow.com/q/1176386 | https://stackoverflow.com/a/1177511 | <p>You could do this:</p>
<pre><code>$ bind '"\C-j": "\C-atime \C-m"'
</code></pre>
<p>Or put this in your <code>~/.inputrc</code>:</p>
<pre><code>"\C-j": "\C-atime \C-m"
</code></pre>
<p>Then when you want to do <code>time sleep 1</code> you'd type <code>sleep 1</code> and press <kbd>Ctrl</kbd>+<kbd>J</kbd> instea... | <p>You could do this:</p> <pre><code>$ bind '"\C-j": "\C-atime \C-m"' </code></pre> <p>Or put this in your <code>~/.inputrc</code>:</p> <pre><code>"\C-j": "\C-atime \C-m" </code></pre> <p>Then when you want to do <code>time sleep 1</code> you'd type <code>sleep 1</code> and press <kbd>Ctrl</kbd>+<kbd>J</kbd> instea... | 387, 603, 5003 | bash, prompt, time | <h1>Automatically timing every executed command and show in Bash prompt?</h1>
<p>I often happen to forget to explicitly prefix executions with the "time" command, ideally I would see in the next shell prompt how much real time the last command took (on every command).</p>
<p>I already scoured through the bash document... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,119 | bash | # Automatically timing every executed command and show in Bash prompt?
I often happen to forget to explicitly prefix executions with the "time" command, ideally I would see in the next shell prompt how much real time the last command took (on every command).
I already scoured through the bash documentation, but could... | You could do this:
```
$ bind '"\C-j": "\C-atime \C-m"'
```
Or put this in your `~/.inputrc`:
```
"\C-j": "\C-atime \C-m"
```
Then when you want to do `time sleep 1` you'd type `sleep 1` and press `Ctrl`+`J` instead of `Enter`.
I would not recommend swapping the `j` and `m` in the bind command (or in the .inputrc ... |
66970902 | Getting the error: bash: (program): cannot execute binary file: Exec format error, on both 32-bit and 64-bit Windows | 16 | 2021-04-06 14:45:10 | <p>There is a program developed for linguistic research (<a href="http://people.csail.mit.edu/mcollins/code.html" rel="noreferrer">http://people.csail.mit.edu/mcollins/code.html</a>). When I try to run the parser using Git bash terminal on Windows, I get the error:</p>
<pre><code>bash: cannot execute binary file: Exec ... | 167,548 | 11,926,527 | 2024-06-04 08:43:44 | 66,971,306 | 13 | 2021-04-06 15:07:48 | 995,714 | 2022-05-02 22:43:22 | https://stackoverflow.com/q/66970902 | https://stackoverflow.com/a/66971306 | <p>As indicated by <code>file</code>, your program is a <strong>Linux application</strong> so you can't run it on Windows. See</p>
<ul>
<li><a href="https://stackoverflow.com/q/32117572/995714">Why does a linux compiled program not work on Windows</a></li>
<li><a href="https://superuser.com/q/209703/241386">Why won't W... | <p>As indicated by <code>file</code>, your program is a <strong>Linux application</strong> so you can't run it on Windows. See</p> <ul> <li><a href="https://stackoverflow.com/q/32117572/995714">Why does a linux compiled program not work on Windows</a></li> <li><a href="https://superuser.com/q/209703/241386">Why won't W... | 34, 64, 387, 1135, 10059 | bash, elf, executable, unix, windows | <h1>Getting the error: bash: (program): cannot execute binary file: Exec format error, on both 32-bit and 64-bit Windows</h1>
<p>There is a program developed for linguistic research (<a href="http://people.csail.mit.edu/mcollins/code.html" rel="noreferrer">http://people.csail.mit.edu/mcollins/code.html</a>). When I try... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,120 | bash | # Getting the error: bash: (program): cannot execute binary file: Exec format error, on both 32-bit and 64-bit Windows
There is a program developed for linguistic research (<http://people.csail.mit.edu/mcollins/code.html>). When I try to run the parser using Git bash terminal on Windows, I get the error:
```
bash: ca... | As indicated by `file`, your program is a **Linux application** so you can't run it on Windows. See
- [Why does a linux compiled program not work on Windows](https://stackoverflow.com/q/32117572/995714)
- [Why won't Windows EXE files work on Linux?](https://superuser.com/q/209703/241386)
- [Why do you need to recompil... |
51972474 | Override bash completion for git clone | 16 | 2018-08-22 17:46:15 | <h2>builtin completion</h2>
<p>The default <a href="https://github.com/git/git/blob/7e8bfb0412581daf8f3c89909f1d37844e8610dd/contrib/completion/git-completion.bash#L1387-L1395" rel="noreferrer">completion for git clone</a> (reproduced below) gives tab completion for <code>--*</code> options:</p>
<pre><code>_git_clone... | 1,620 | 812,183 | 2021-08-08 02:03:43 | 54,305,694 | 13 | 2019-01-22 10:03:16 | 10,524,205 | 2019-01-23 18:20:47 | https://stackoverflow.com/q/51972474 | https://stackoverflow.com/a/54305694 | <p>The <a href="https://github.com/scop/bash-completion#faq" rel="noreferrer">official FAQ</a> of bash-completion contains very interesting information.</p>
<p>First, if you are 100% sure your <code>$BASH_COMPLETION_USER_DIR</code> and <code>$XDG_DATA_HOME</code> environment variable are empty, what you specified in y... | <p>The <a href="https://github.com/scop/bash-completion#faq" rel="noreferrer">official FAQ</a> of bash-completion contains very interesting information.</p> <p>First, if you are 100% sure your <code>$BASH_COMPLETION_USER_DIR</code> and <code>$XDG_DATA_HOME</code> environment variable are empty, what you specified in y... | 119, 387, 59778 | bash, bash-completion, git | <h1>Override bash completion for git clone</h1>
<h2>builtin completion</h2>
<p>The default <a href="https://github.com/git/git/blob/7e8bfb0412581daf8f3c89909f1d37844e8610dd/contrib/completion/git-completion.bash#L1387-L1395" rel="noreferrer">completion for git clone</a> (reproduced below) gives tab completion for <cod... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,121 | bash | # Override bash completion for git clone
## builtin completion
The default [completion for git clone](https://github.com/git/git/blob/7e8bfb0412581daf8f3c89909f1d37844e8610dd/contrib/completion/git-completion.bash#L1387-L1395) (reproduced below) gives tab completion for `--*` options:
```
_git_clone ()
{
case "$... | The [official FAQ](https://github.com/scop/bash-completion#faq) of bash-completion contains very interesting information.
First, if you are 100% sure your `$BASH_COMPLETION_USER_DIR` and `$XDG_DATA_HOME` environment variable are empty, what you specified in your original question is a good place to add your own bash-c... |
50954038 | How to retrieve only enabled users from the Active Directory | 16 | 2018-06-20 17:36:26 | <p>I'm trying to retrieve only enabled users in the AD. When I run this code line it returns the error. I tried using a filter as well to filter only enabled users for the requested info but it returns ALL users from every domain instead of just the single id.</p>
<pre><code>Get-ADUser : A positional parameter cannot ... | 228,199 | 9,772,081 | 2021-05-21 11:23:14 | 50,954,775 | 13 | 2018-06-20 18:23:15 | 2,734,259 | 2018-06-20 18:23:15 | https://stackoverflow.com/q/50954038 | https://stackoverflow.com/a/50954775 | <pre><code>Get-ADUser -Filter * -Properties mail | Where { $_.Enabled -eq $True} | Select Name,samaccountname,mail
</code></pre>
<p>That will get all enabled users in your target domain that are enabled and display the name, username, and mail properties</p>
| <pre><code>Get-ADUser -Filter * -Properties mail | Where { $_.Enabled -eq $True} | Select Name,samaccountname,mail </code></pre> <p>That will get all enabled users in your target domain that are enabled and display the name, username, and mail properties</p> | 526, 10401 | active-directory, powershell | <h1>How to retrieve only enabled users from the Active Directory</h1>
<p>I'm trying to retrieve only enabled users in the AD. When I run this code line it returns the error. I tried using a filter as well to filter only enabled users for the requested info but it returns ALL users from every domain instead of just the ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,122 | bash | # How to retrieve only enabled users from the Active Directory
I'm trying to retrieve only enabled users in the AD. When I run this code line it returns the error. I tried using a filter as well to filter only enabled users for the requested info but it returns ALL users from every domain instead of just the single id... | ```
Get-ADUser -Filter * -Properties mail | Where { $_.Enabled -eq $True} | Select Name,samaccountname,mail
```
That will get all enabled users in your target domain that are enabled and display the name, username, and mail properties |
43015262 | Change color of first input word in PowerShell | 16 | 2017-03-25 10:28:55 | <p>I want to change color of first console statement from yellow to some another color because it looks bad on a white background. How can i do this ?
<a href="https://i.sstatic.net/XDnlJ.png" rel="noreferrer"><img src="https://i.sstatic.net/XDnlJ.png" alt="enter image description here"></a></p>
<p><a href="https://i.... | 8,834 | 2,726,561 | 2022-05-26 15:40:38 | 43,015,533 | 13 | 2017-03-25 10:59:21 | 712,649 | 2017-03-25 10:59:21 | https://stackoverflow.com/q/43015262 | https://stackoverflow.com/a/43015533 | <p>The syntax highlighting comes from <code>PSReadLine</code>. To set the foreground color for <code>Command</code> tokens (which shows in yellow by default), use <code>Set-PSReadLineOption</code>:</p>
<pre><code>Set-PSReadlineOption -TokenKind Command -ForegroundColor DarkGreen
</code></pre>
<p>Place that statement ... | <p>The syntax highlighting comes from <code>PSReadLine</code>. To set the foreground color for <code>Command</code> tokens (which shows in yellow by default), use <code>Set-PSReadLineOption</code>:</p> <pre><code>Set-PSReadlineOption -TokenKind Command -ForegroundColor DarkGreen </code></pre> <p>Place that statement ... | 526 | powershell | <h1>Change color of first input word in PowerShell</h1>
<p>I want to change color of first console statement from yellow to some another color because it looks bad on a white background. How can i do this ?
<a href="https://i.sstatic.net/XDnlJ.png" rel="noreferrer"><img src="https://i.sstatic.net/XDnlJ.png" alt="enter ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,123 | bash | # Change color of first input word in PowerShell
I want to change color of first console statement from yellow to some another color because it looks bad on a white background. How can i do this ?
[](https://i.sstatic.net/XDnlJ.png)
[, with ruby already installed.
... |
28096697 | how to get current terminal color pair in bash | 16 | 2015-01-22 19:04:10 | <p>I would like to query and store the current terminal color pair in BASH e.g.:</p>
<pre><code>#!/bin/bash
#some ANSI colour escape sequences
red="\033[0;31m"
grn="\033[0;32m"
blu="\033[0;34m"
def="\033[0;00m" # default
echo -e "Change to ${red} red to ${def} default to ${blu} blue."
# now store the current color... | 8,937 | 4,483,909 | 2022-03-03 07:12:31 | 28,334,701 | 13 | 2015-02-05 01:27:28 | 4,518,274 | 2015-02-05 01:27:28 | https://stackoverflow.com/q/28096697 | https://stackoverflow.com/a/28334701 | <p>The question was about the current <em>color</em>, not the cursor <em>position</em>.</p>
<p>Both are "nonstandard" (though the latter, cursor position report is implemented by anything which has a valid claim to "VT100 emulator").</p>
<p>However, xterm implements a set of escape sequences referred to as <em>dynami... | <p>The question was about the current <em>color</em>, not the cursor <em>position</em>.</p> <p>Both are "nonstandard" (though the latter, cursor position report is implemented by anything which has a valid claim to "VT100 emulator").</p> <p>However, xterm implements a set of escape sequences referred to as <em>dynami... | 387, 46328 | ansi-colors, bash | <h1>how to get current terminal color pair in bash</h1>
<p>I would like to query and store the current terminal color pair in BASH e.g.:</p>
<pre><code>#!/bin/bash
#some ANSI colour escape sequences
red="\033[0;31m"
grn="\033[0;32m"
blu="\033[0;34m"
def="\033[0;00m" # default
echo -e "Change to ${red} red to ${def}... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,125 | bash | # how to get current terminal color pair in bash
I would like to query and store the current terminal color pair in BASH e.g.:
```
#!/bin/bash
#some ANSI colour escape sequences
red="\033[0;31m"
grn="\033[0;32m"
blu="\033[0;34m"
def="\033[0;00m" # default
echo -e "Change to ${red} red to ${def} default to ${blu} b... | The question was about the current *color*, not the cursor *position*.
Both are "nonstandard" (though the latter, cursor position report is implemented by anything which has a valid claim to "VT100 emulator").
However, xterm implements a set of escape sequences referred to as *dynamic colors*, which predate the ANSI ... |
6919403 | Set clipboard to image - pbcopy | 16 | 2011-08-02 22:20:06 | <p>How do you set an image as the clipboard with pbcopy?</p>
<p>This doesn't work:</p>
<pre><code>cat image.png | pbcopy
</code></pre>
| 7,879 | 640,584 | 2024-01-17 23:02:19 | 21,352,303 | 13 | 2014-01-25 15:16:07 | 148,668 | 2014-01-25 15:16:07 | https://stackoverflow.com/q/6919403 | https://stackoverflow.com/a/21352303 | <p>As stated, this won't work with <code>pbcopy</code>, but you can write a little objective-c program to do this: <a href="http://www.alecjacobson.com/weblog/?p=3816" rel="noreferrer">http://www.alecjacobson.com/weblog/?p=3816</a> . Then you can issue:</p>
<pre><code>cat image.png | impbcopy -
</code></pre>
| <p>As stated, this won't work with <code>pbcopy</code>, but you can write a little objective-c program to do this: <a href="http://www.alecjacobson.com/weblog/?p=3816" rel="noreferrer">http://www.alecjacobson.com/weblog/?p=3816</a> . Then you can issue:</p> <pre><code>cat image.png | impbcopy - </code></pre> | 369, 387, 524, 26252 | bash, clipboard, macos, pbcopy | <h1>Set clipboard to image - pbcopy</h1>
<p>How do you set an image as the clipboard with pbcopy?</p>
<p>This doesn't work:</p>
<pre><code>cat image.png | pbcopy
</code></pre>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,126 | bash | # Set clipboard to image - pbcopy
How do you set an image as the clipboard with pbcopy?
This doesn't work:
```
cat image.png | pbcopy
``` | As stated, this won't work with `pbcopy`, but you can write a little objective-c program to do this: <http://www.alecjacobson.com/weblog/?p=3816> . Then you can issue:
```
cat image.png | impbcopy -
``` |
20161140 | How to make rsync read SRC from STDIN? | 16 | 2013-11-23 10:23:03 | <p>I want to dump my MySQL database and make daily backups with <code>rsync</code>.</p>
<p>First approach I came up with is something like <code>mysqldump -ufoo -pbar baz > /var/tmp/baz.sql && rsync /var/tmp/baz.sql /backup/ && rm /var/tmp/baz.sql</code>.</p>
<p>Then I started to wonder if it is po... | 12,843 | 1,659,619 | 2015-11-06 15:59:28 | 20,161,267 | 13 | 2013-11-23 10:36:44 | 296,974 | 2015-11-06 06:35:55 | https://stackoverflow.com/q/20161140 | https://stackoverflow.com/a/20161267 | <p>This is right, it doesn't work this way. It is because <code>rsync</code> is made to transfer complete file trees from <code>A</code> to <code>B</code>.</p>
<p>Because of the way <code>rsync</code> works, it cannot work, because <code>rsync</code> calculates several checksums before choosing to transfer a particula... | <p>This is right, it doesn't work this way. It is because <code>rsync</code> is made to transfer complete file trees from <code>A</code> to <code>B</code>.</p> <p>Because of the way <code>rsync</code> works, it cannot work, because <code>rsync</code> calculates several checksums before choosing to transfer a particula... | 58, 390, 1159, 5813 | linux, pipe, rsync, shell | <h1>How to make rsync read SRC from STDIN?</h1>
<p>I want to dump my MySQL database and make daily backups with <code>rsync</code>.</p>
<p>First approach I came up with is something like <code>mysqldump -ufoo -pbar baz > /var/tmp/baz.sql && rsync /var/tmp/baz.sql /backup/ && rm /var/tmp/baz.sql</cod... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,127 | bash | # How to make rsync read SRC from STDIN?
I want to dump my MySQL database and make daily backups with `rsync`.
First approach I came up with is something like `mysqldump -ufoo -pbar baz > /var/tmp/baz.sql && rsync /var/tmp/baz.sql /backup/ && rm /var/tmp/baz.sql`.
Then I started to wonder if it is possible not to us... | This is right, it doesn't work this way. It is because `rsync` is made to transfer complete file trees from `A` to `B`.
Because of the way `rsync` works, it cannot work, because `rsync` calculates several checksums before choosing to transfer a particular file (or parts of it), and doing so in only 2 iterations (ping-... |
17997214 | Why does the redirection symbol change the behavior of ls? | 16 | 2013-08-01 14:44:54 | <p>So, I have always had doubts about how redirection works in the following situations:</p>
<ol>
<li><p>I type "ls" and all the filenames are separated by white spaces:</p>
<pre><code>test$ touch a b c
test$ ls
a b c
</code></pre></li>
<li><p>I use a ">" to redirect STDOUT to a file:</p>
<pre><code>test$ ls > ls... | 654 | 1,337,629 | 2013-08-03 06:28:12 | 17,997,277 | 13 | 2013-08-01 14:47:02 | 298,225 | 2013-08-01 14:54:00 | https://stackoverflow.com/q/17997214 | https://stackoverflow.com/a/17997277 | <p><code>ls</code> tests its output stream to see whether it is a terminal, and it modifies its behavior depending on that.</p>
<p>This is documented; the <code>man</code> page for <code>ls</code> documents several things that depend on whether the output is a terminal:</p>
<ul>
<li>If the output is a terminal, <code... | <p><code>ls</code> tests its output stream to see whether it is a terminal, and it modifies its behavior depending on that.</p> <p>This is documented; the <code>man</code> page for <code>ls</code> documents several things that depend on whether the output is a terminal:</p> <ul> <li>If the output is a terminal, <code... | 34, 58, 387 | bash, linux, unix | <h1>Why does the redirection symbol change the behavior of ls?</h1>
<p>So, I have always had doubts about how redirection works in the following situations:</p>
<ol>
<li><p>I type "ls" and all the filenames are separated by white spaces:</p>
<pre><code>test$ touch a b c
test$ ls
a b c
</code></pre></li>
<li><p>I use ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,128 | bash | # Why does the redirection symbol change the behavior of ls?
So, I have always had doubts about how redirection works in the following situations:
1. I type "ls" and all the filenames are separated by white spaces:
```
test$ touch a b c
test$ ls
a b c
```
2. I use a ">" to redirect STDOUT to a file:
... | `ls` tests its output stream to see whether it is a terminal, and it modifies its behavior depending on that.
This is documented; the `man` page for `ls` documents several things that depend on whether the output is a terminal:
- If the output is a terminal, `-C` (for multi-column output) is a default, otherwise `-1`... |
17100244 | How do I change the order in which grep looks at files/prints results? | 16 | 2013-06-14 02:32:34 | <p>I have a directory with a bunch of files with numerical filenames. They don't have leading zeroes, so if I do something like <code>grep hello *</code> in that directory I might get something like this:</p>
<pre><code>22:hello, world!
6:hello
62:"Say hello to them for me."
</code></pre>
<p>I'd rather have the resul... | 15,976 | 1,945,088 | 2022-04-04 17:53:45 | 17,100,283 | 13 | 2013-06-14 02:37:14 | 68,587 | 2013-06-14 02:37:14 | https://stackoverflow.com/q/17100244 | https://stackoverflow.com/a/17100283 | <pre><code>ls * | sort -n | xargs -d '\n' grep hello
</code></pre>
| <pre><code>ls * | sort -n | xargs -d '\n' grep hello </code></pre> | 58, 387, 1271, 4072 | bash, gnu, grep, linux | <h1>How do I change the order in which grep looks at files/prints results?</h1>
<p>I have a directory with a bunch of files with numerical filenames. They don't have leading zeroes, so if I do something like <code>grep hello *</code> in that directory I might get something like this:</p>
<pre><code>22:hello, world!
6:... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,129 | bash | # How do I change the order in which grep looks at files/prints results?
I have a directory with a bunch of files with numerical filenames. They don't have leading zeroes, so if I do something like `grep hello *` in that directory I might get something like this:
```
22:hello, world!
6:hello
62:"Say hello to them for... | ```
ls * | sort -n | xargs -d '\n' grep hello
``` |
15343561 | Bash: Running the same program over multiple cores | 16 | 2013-03-11 16:24:12 | <p>I have access to a machine where I have access to 10 of the cores -- and I would like to actually use them. What I am used to doing on my own machine would be something like this:</p>
<pre><code>for f in *.fa; do
myProgram (options) "./$f" "./$f.tmp"
done
</code></pre>
<p>I have 10 files I'd like to do this on -... | 35,782 | 1,689,624 | 2015-02-11 11:52:36 | 15,344,181 | 13 | 2013-03-11 16:55:08 | 1,126,841 | 2013-03-11 17:22:46 | https://stackoverflow.com/q/15343561 | https://stackoverflow.com/a/15344181 | <p>You could use</p>
<pre><code>for f in *.fa; do
myProgram (options) "./$f" "./$f.tmp" &
done
wait
</code></pre>
<p>which would start all of you jobs in parallel, then wait until they <em>all</em> complete before moving on. In the case where you have more jobs than cores, you would start all of them and let ... | <p>You could use</p> <pre><code>for f in *.fa; do myProgram (options) "./$f" "./$f.tmp" & done wait </code></pre> <p>which would start all of you jobs in parallel, then wait until they <em>all</em> complete before moving on. In the case where you have more jobs than cores, you would start all of them and let ... | 58, 353, 387, 15475 | bash, linux, multiprocessing, parallel-processing | <h1>Bash: Running the same program over multiple cores</h1>
<p>I have access to a machine where I have access to 10 of the cores -- and I would like to actually use them. What I am used to doing on my own machine would be something like this:</p>
<pre><code>for f in *.fa; do
myProgram (options) "./$f" "./$f.tmp"
don... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,130 | bash | # Bash: Running the same program over multiple cores
I have access to a machine where I have access to 10 of the cores -- and I would like to actually use them. What I am used to doing on my own machine would be something like this:
```
for f in *.fa; do
myProgram (options) "./$f" "./$f.tmp"
done
```
I have 10 fil... | You could use
```
for f in *.fa; do
myProgram (options) "./$f" "./$f.tmp" &
done
wait
```
which would start all of you jobs in parallel, then wait until they *all* complete before moving on. In the case where you have more jobs than cores, you would start all of them and let your OS scheduler worry about swapping... |
14552466 | Why do long results from Git commands kill my PowerShell prompt? | 16 | 2013-01-27 21:23:36 | <p>I am using Git Shell (the module for PowerShell) on Windows. It's the one that got installed when I installed Git for Windows. When I run a command that results in a lot of text such as <code>git log</code> I get a page of results and then a ":" at the bottom of the screen. I guess it's a continuation prompt becau... | 1,364 | 1,499,273 | 2017-04-25 20:36:16 | 14,554,035 | 13 | 2013-01-28 00:47:42 | 413,399 | 2013-01-28 05:02:12 | https://stackoverflow.com/q/14552466 | https://stackoverflow.com/a/14554035 | <p>Several of the git commands use a pager to allow you to view one screen full of information at a time. The one that come with git is usually <code>less</code> (<a href="http://en.wikipedia.org/wiki/Less_%28Unix%29" rel="noreferrer">more info</a>). You can visit the link for common commands, but as you've found the... | <p>Several of the git commands use a pager to allow you to view one screen full of information at a time. The one that come with git is usually <code>less</code> (<a href="http://en.wikipedia.org/wiki/Less_%28Unix%29" rel="noreferrer">more info</a>). You can visit the link for common commands, but as you've found the... | 64, 119, 526 | git, powershell, windows | <h1>Why do long results from Git commands kill my PowerShell prompt?</h1>
<p>I am using Git Shell (the module for PowerShell) on Windows. It's the one that got installed when I installed Git for Windows. When I run a command that results in a lot of text such as <code>git log</code> I get a page of results and then a... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,131 | bash | # Why do long results from Git commands kill my PowerShell prompt?
I am using Git Shell (the module for PowerShell) on Windows. It's the one that got installed when I installed Git for Windows. When I run a command that results in a lot of text such as `git log` I get a page of results and then a ":" at the bottom of ... | Several of the git commands use a pager to allow you to view one screen full of information at a time. The one that come with git is usually `less` ([more info](http://en.wikipedia.org/wiki/Less_%28Unix%29)). You can visit the link for common commands, but as you've found the most important is `q` to quit to get back t... |
9506437 | Python subprocess call returns "command not found", Terminal executes correctly | 16 | 2012-02-29 20:53:06 | <p>I am trying to run gphoto2 from python but, with no succes. It just returns command not found.
gphoto is installed correctly, as in, the commands work fine in Terminal.</p>
<pre><code>p = subprocess.Popen(['gphoto2'], shell=True, stdout=subprocess.PIPE,
stderr=subprocess.STDOUT, executable='/bin/bash')
for lin... | 37,498 | 1,143,155 | 2012-02-29 22:32:15 | 9,506,481 | 13 | 2012-02-29 20:56:02 | 190,597 | 2012-02-29 20:57:07 | https://stackoverflow.com/q/9506437 | https://stackoverflow.com/a/9506481 | <p>When using <code>shell = True</code>, the first argument to <code>subprocess.Popen</code> should be a string, not a list:</p>
<pre><code>p = subprocess.Popen('gphoto2', shell=True, ...)
</code></pre>
<p>However, using <code>shell = True</code> should be avoided if possible since it can be a <a href="http://docs.py... | <p>When using <code>shell = True</code>, the first argument to <code>subprocess.Popen</code> should be a string, not a list:</p> <pre><code>p = subprocess.Popen('gphoto2', shell=True, ...) </code></pre> <p>However, using <code>shell = True</code> should be avoided if possible since it can be a <a href="http://docs.py... | 16, 390, 391, 2348 | python, shell, subprocess, terminal | <h1>Python subprocess call returns "command not found", Terminal executes correctly</h1>
<p>I am trying to run gphoto2 from python but, with no succes. It just returns command not found.
gphoto is installed correctly, as in, the commands work fine in Terminal.</p>
<pre><code>p = subprocess.Popen(['gphoto2'], shell=Tru... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,132 | bash | # Python subprocess call returns "command not found", Terminal executes correctly
I am trying to run gphoto2 from python but, with no succes. It just returns command not found.
gphoto is installed correctly, as in, the commands work fine in Terminal.
```
p = subprocess.Popen(['gphoto2'], shell=True, stdout=subprocess... | When using `shell = True`, the first argument to `subprocess.Popen` should be a string, not a list:
```
p = subprocess.Popen('gphoto2', shell=True, ...)
```
However, using `shell = True` should be avoided if possible since it can be a [security risk](http://docs.python.org/library/subprocess.html#frequently-used-argu... |
9337489 | Brace expansion with a Bash variable - {0..$foo} | 16 | 2012-02-18 00:56:39 | <pre><code>WEEKS_TO_SAVE=4
mkdir -p weekly.{0..$WEEKS_TO_SAVE}
</code></pre>
<p>gives me a folder called weekly.{0..4}</p>
<p>Is there a secret to curly brace expansion while creating folders I'm missing?</p>
| 6,734 | 1,107,232 | 2024-04-21 09:35:46 | 9,338,515 | 13 | 2012-02-18 04:21:37 | 348,785 | 2024-04-21 09:35:46 | https://stackoverflow.com/q/9337489 | https://stackoverflow.com/a/9338515 | <p><code>bash</code> does <em>brace expansion</em> before <em>variable expansion,</em> so you get <code>weekly.{0..4}</code>.<br />
Because the result is predictable and safe (<strong>don't trust user input</strong>), you can use <code>eval</code> in your case:</p>
<pre><code>$ WEEKS_TO_SAVE=4
$ eval "mkdir -p wee... | <p><code>bash</code> does <em>brace expansion</em> before <em>variable expansion,</em> so you get <code>weekly.{0..4}</code>.<br /> Because the result is predictable and safe (<strong>don't trust user input</strong>), you can use <code>eval</code> in your case:</p> <pre><code>$ WEEKS_TO_SAVE=4 $ eval "mkdir -p wee... | 387, 41340 | bash, brace-expansion | <h1>Brace expansion with a Bash variable - {0..$foo}</h1>
<pre><code>WEEKS_TO_SAVE=4
mkdir -p weekly.{0..$WEEKS_TO_SAVE}
</code></pre>
<p>gives me a folder called weekly.{0..4}</p>
<p>Is there a secret to curly brace expansion while creating folders I'm missing?</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,133 | bash | # Brace expansion with a Bash variable - {0..$foo}
```
WEEKS_TO_SAVE=4
mkdir -p weekly.{0..$WEEKS_TO_SAVE}
```
gives me a folder called weekly.{0..4}
Is there a secret to curly brace expansion while creating folders I'm missing? | `bash` does *brace expansion* before *variable expansion,* so you get `weekly.{0..4}`.
Because the result is predictable and safe (**don't trust user input**), you can use `eval` in your case:
```
$ WEEKS_TO_SAVE=4
$ eval "mkdir -p weekly.{0..$((WEEKS_TO_SAVE))}"
```
**note**:
1. `eval` is evil
2. use `eval` caref... |
7767447 | How can I force PHP Version for Command Line? | 16 | 2011-10-14 12:18:07 | <p>I am hosted with 1and1.com, and I have setup my files to be parsed with php5 using <code>.htaccess</code>.</p>
<p>But that only works in apache, and not in command line, which defaults to the server default php4.</p>
<p>So currently I can not setup <em>cron jobs</em> to run my code as php5. Any ideas?</p>
| 41,089 | 510,785 | 2020-08-15 18:10:09 | 7,767,484 | 13 | 2011-10-14 12:21:21 | 889,949 | 2011-10-14 12:21:21 | https://stackoverflow.com/q/7767447 | https://stackoverflow.com/a/7767484 | <p>If both are installed, all you need to do is run the script using the relevant PHP binary.</p>
<p>So for example:</p>
<pre><code> // Runs using the PHP binary located at /usr/bin/php
* * * * * root /usr/bin/php -n "/path/to/script.php"
</code></pre>
<p>or</p>
<pre><code> // Runs using the PHP binary located at ... | <p>If both are installed, all you need to do is run the script using the relevant PHP binary.</p> <p>So for example:</p> <pre><code> // Runs using the PHP binary located at /usr/bin/php * * * * * root /usr/bin/php -n "/path/to/script.php" </code></pre> <p>or</p> <pre><code> // Runs using the PHP binary located at ... | 5, 390, 601, 11225 | command-line-interface, cron, php, shell | <h1>How can I force PHP Version for Command Line?</h1>
<p>I am hosted with 1and1.com, and I have setup my files to be parsed with php5 using <code>.htaccess</code>.</p>
<p>But that only works in apache, and not in command line, which defaults to the server default php4.</p>
<p>So currently I can not setup <em>cron jo... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,134 | bash | # How can I force PHP Version for Command Line?
I am hosted with 1and1.com, and I have setup my files to be parsed with php5 using `.htaccess`.
But that only works in apache, and not in command line, which defaults to the server default php4.
So currently I can not setup *cron jobs* to run my code as php5. Any ideas... | If both are installed, all you need to do is run the script using the relevant PHP binary.
So for example:
```
// Runs using the PHP binary located at /usr/bin/php
* * * * * root /usr/bin/php -n "/path/to/script.php"
```
or
```
// Runs using the PHP binary located at /var/php5
* * * * * root /var/php5 -n "/path... |
3704549 | Visual Studio - Post Build Event - Throwing Errors | 16 | 2010-09-13 21:26:16 | <p>I've got a nice power-shell driven post-build script that does some magic mumbo-jumbo for pulling all our plugins into the correct location after they're compiled and sorting out thier dependencies with the master-project of the solution.</p>
<p>My problem is, occasionally when I do something stupid, I can end up i... | 7,641 | 317,975 | 2016-02-09 10:16:17 | 3,704,584 | 13 | 2010-09-13 21:32:11 | 404,854 | 2010-09-14 05:55:02 | https://stackoverflow.com/q/3704549 | https://stackoverflow.com/a/3704584 | <p>Here are two approaches for interrupting the build when a PowerShell script errors.</p>
<h2>Use <code>exit()</code> to terminate the PowerShell process</h2>
<p>To return a status code from the script which, if non-zero, will show up in the error list, use the following:</p>
<pre><code>exit(45) # or any other non-... | <p>Here are two approaches for interrupting the build when a PowerShell script errors.</p> <h2>Use <code>exit()</code> to terminate the PowerShell process</h2> <p>To return a status code from the script which, if non-zero, will show up in the error list, use the following:</p> <pre><code>exit(45) # or any other non-... | 526, 31225, 33953 | post-build-event, powershell, visual-studio | <h1>Visual Studio - Post Build Event - Throwing Errors</h1>
<p>I've got a nice power-shell driven post-build script that does some magic mumbo-jumbo for pulling all our plugins into the correct location after they're compiled and sorting out thier dependencies with the master-project of the solution.</p>
<p>My problem... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,135 | bash | # Visual Studio - Post Build Event - Throwing Errors
I've got a nice power-shell driven post-build script that does some magic mumbo-jumbo for pulling all our plugins into the correct location after they're compiled and sorting out thier dependencies with the master-project of the solution.
My problem is, occasionall... | Here are two approaches for interrupting the build when a PowerShell script errors.
## Use `exit()` to terminate the PowerShell process
To return a status code from the script which, if non-zero, will show up in the error list, use the following:
```
exit(45) # or any other non-zero number, for that matter.
```
Thi... |
911816 | Detecting the output stream type of a shell script | 16 | 2009-05-26 17:26:12 | <p>I'm writing a shell script that uses ANSI color characters on the command line.</p>
<p>Example: <strong>example.sh</strong></p>
<pre><code>#!/bin/tcsh
printf "\033[31m Success Color is awesome!\033[0m"
</code></pre>
<p>My problem is when doing:</p>
<pre><code>$ ./example.sh > out
</code></pre>
<p>or </p>
<p... | 6,741 | 3,415 | 2009-05-27 21:48:26 | 911,854 | 13 | 2009-05-26 17:39:22 | 57,301 | 2009-05-26 18:00:49 | https://stackoverflow.com/q/911816 | https://stackoverflow.com/a/911854 | <p>See this <a href="https://stackoverflow.com/questions/911168/detect-if-shell-script-is-running-through-a-pipe">previous SO question</a>, which covers bash. Tcsh provides the same functionality with <code>filetest -t 1</code> to see if standard output is a terminal. If it is, then print the color stuff, else leave it... | <p>See this <a href="https://stackoverflow.com/questions/911168/detect-if-shell-script-is-running-through-a-pipe">previous SO question</a>, which covers bash. Tcsh provides the same functionality with <code>filetest -t 1</code> to see if standard output is a terminal. If it is, then print the color stuff, else leave it... | 34, 58, 390, 531 | linux, scripting, shell, unix | <h1>Detecting the output stream type of a shell script</h1>
<p>I'm writing a shell script that uses ANSI color characters on the command line.</p>
<p>Example: <strong>example.sh</strong></p>
<pre><code>#!/bin/tcsh
printf "\033[31m Success Color is awesome!\033[0m"
</code></pre>
<p>My problem is when doing:</p>
<pre... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,136 | bash | # Detecting the output stream type of a shell script
I'm writing a shell script that uses ANSI color characters on the command line.
Example: **example.sh**
```
#!/bin/tcsh
printf "\033[31m Success Color is awesome!\033[0m"
```
My problem is when doing:
```
$ ./example.sh > out
```
or
```
$./example.sh | grep
``... | See this [previous SO question](https://stackoverflow.com/questions/911168/detect-if-shell-script-is-running-through-a-pipe), which covers bash. Tcsh provides the same functionality with `filetest -t 1` to see if standard output is a terminal. If it is, then print the color stuff, else leave it out. Here's tcsh:
```
#... |
67836594 | How to get size of hidden files with "du" | 15 | 2021-06-04 11:40:09 | <p>I've been using "du -hs ~/" to get the size of my total home directory with outputs 20GB, and I've been trying to where large files that I can delete to free up some space. However, when using "du -hs ~/*" I get numerous outputted files <em>but</em> they don't sum to 20GB. There are a few hidden ... | 32,323 | 6,300,467 | 2024-04-10 17:26:43 | 67,836,667 | 13 | 2021-06-04 11:46:01 | 261,142 | 2021-06-04 11:46:01 | https://stackoverflow.com/q/67836594 | https://stackoverflow.com/a/67836667 | <p>The problem lies not with <code>du</code> but with how the shell resolves <code>*</code> - it does not include files that start with a period. To remedy, just mention those files explicitly:</p>
<pre><code>du -hs ~/* ~/.*
</code></pre>
<p>In order to find the largest of those files, simply pipe the output to a <code... | <p>The problem lies not with <code>du</code> but with how the shell resolves <code>*</code> - it does not include files that start with a period. To remedy, just mention those files explicitly:</p> <pre><code>du -hs ~/* ~/.* </code></pre> <p>In order to find the largest of those files, simply pipe the output to a <code... | 387, 390, 3039, 26163 | bash, diskspace, du, shell | <h1>How to get size of hidden files with "du"</h1>
<p>I've been using "du -hs ~/" to get the size of my total home directory with outputs 20GB, and I've been trying to where large files that I can delete to free up some space. However, when using "du -hs ~/*" I get numerous outputted files <em>but</... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,137 | bash | # How to get size of hidden files with "du"
I've been using "du -hs ~/" to get the size of my total home directory with outputs 20GB, and I've been trying to where large files that I can delete to free up some space. However, when using "du -hs ~/*" I get numerous outputted files *but* they don't sum to 20GB. There ar... | The problem lies not with `du` but with how the shell resolves `*` - it does not include files that start with a period. To remedy, just mention those files explicitly:
```
du -hs ~/* ~/.*
```
In order to find the largest of those files, simply pipe the output to a `sort` command, with an optional `tail` appended:
`... |
55637169 | Invoke-Sqlcmd with AAD authentication | 15 | 2019-04-11 16:24:26 | <p>In an Azure DevOps 'release pipeline', I provision Azure resources - including SQLServer databases - and try to configure access to databases using managed identities.</p>
<p>After ensuring the DevOps service principal is a member of the AAD group defined as AAD administrator for the database server, I need to run ... | 21,586 | 295,203 | 2025-07-23 13:29:43 | 66,880,422 | 13 | 2021-03-31 01:25:27 | 30,809 | 2025-07-23 13:29:43 | https://stackoverflow.com/q/55637169 | https://stackoverflow.com/a/66880422 | <p>To authenticate with AAD, you'll need the following:</p>
<ul>
<li>An Azure Service principal</li>
<li>A database where the Service Principal is either the Azure AD Administrator, or assigned to the database</li>
<li>An Azure DevOps Service Connection that uses this Service Principal</li>
</ul>
<p>In your Azure DevOp... | <p>To authenticate with AAD, you'll need the following:</p> <ul> <li>An Azure Service principal</li> <li>A database where the Service Principal is either the Azure AD Administrator, or assigned to the database</li> <li>An Azure DevOps Service Connection that uses this Service Principal</li> </ul> <p>In your Azure DevOp... | 526, 81879, 93887, 115169, 116537 | azure-active-directory, azure-devops, azure-powershell, azure-sql-database, powershell | <h1>Invoke-Sqlcmd with AAD authentication</h1>
<p>In an Azure DevOps 'release pipeline', I provision Azure resources - including SQLServer databases - and try to configure access to databases using managed identities.</p>
<p>After ensuring the DevOps service principal is a member of the AAD group defined as AAD admini... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,138 | bash | # Invoke-Sqlcmd with AAD authentication
In an Azure DevOps 'release pipeline', I provision Azure resources - including SQLServer databases - and try to configure access to databases using managed identities.
After ensuring the DevOps service principal is a member of the AAD group defined as AAD administrator for the ... | To authenticate with AAD, you'll need the following:
- An Azure Service principal
- A database where the Service Principal is either the Azure AD Administrator, or assigned to the database
- An Azure DevOps Service Connection that uses this Service Principal
In your Azure DevOps pipeline, use an Azure PowerShell Task... |
41619629 | Exit code of traps in Bash | 15 | 2017-01-12 17:39:45 | <p>This is <code>myscript.sh</code>:</p>
<pre><code>#!/bin/bash
function mytrap {
echo "Trapped!"
}
trap mytrap EXIT
exit 3
</code></pre>
<p>And when I run it:</p>
<pre><code>> ./myscript.sh
echo $?
3
</code></pre>
<p>Why is the exit code of the script the exit code with the trap the same as without it? Us... | 10,713 | 647,991 | 2018-10-15 23:32:40 | 41,619,743 | 13 | 2017-01-12 17:47:03 | 5,291,015 | 2017-01-12 18:01:25 | https://stackoverflow.com/q/41619629 | https://stackoverflow.com/a/41619743 | <p>Look the reference from the below <code>man bash</code> page,</p>
<blockquote>
<p>exit [n]
Cause the shell to exit with a status of n. If n is omitted, the exit status is that of the last command executed. A trap on <strong>EXIT</strong> is executed <strong><em>before</em></strong> the shell terminates.</p>
</b... | <p>Look the reference from the below <code>man bash</code> page,</p> <blockquote> <p>exit [n] Cause the shell to exit with a status of n. If n is omitted, the exit status is that of the last command executed. A trap on <strong>EXIT</strong> is executed <strong><em>before</em></strong> the shell terminates.</p> </b... | 387, 2481, 10021, 124485 | bash, bash-trap, exit-code, signals | <h1>Exit code of traps in Bash</h1>
<p>This is <code>myscript.sh</code>:</p>
<pre><code>#!/bin/bash
function mytrap {
echo "Trapped!"
}
trap mytrap EXIT
exit 3
</code></pre>
<p>And when I run it:</p>
<pre><code>> ./myscript.sh
echo $?
3
</code></pre>
<p>Why is the exit code of the script the exit code with... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,139 | bash | # Exit code of traps in Bash
This is `myscript.sh`:
```
#!/bin/bash
function mytrap {
echo "Trapped!"
}
trap mytrap EXIT
exit 3
```
And when I run it:
```
> ./myscript.sh
echo $?
3
```
Why is the exit code of the script the exit code with the trap the same as without it? Usually, a function returns implicitl... | Look the reference from the below `man bash` page,
> exit [n]
> Cause the shell to exit with a status of n. If n is omitted, the exit status is that of the last command executed. A trap on **EXIT** is executed ***before*** the shell terminates.
You have the debug version of the script to prove that,
```
+ trap mytra... |
31142363 | Unix: What does cat by itself do? | 15 | 2015-06-30 15:24:24 | <p>I saw the line <code>data=$(cat)</code> in a bash script (just declaring an empty variable) and am mystified as to what that could possibly do. </p>
<p>I read the man pages, but it doesn't have an example or explanation of this. Does this capture stdin or something? Any documentation on this?</p>
<p>EDIT: Speci... | 2,546 | 3,845,747 | 2017-06-23 23:54:47 | 31,142,432 | 13 | 2015-06-30 15:27:21 | 874,188 | 2015-06-30 15:41:49 | https://stackoverflow.com/q/31142363 | https://stackoverflow.com/a/31142432 | <p><code>cat</code> will catenate its input to its output.</p>
<p>In the context of the variable capture you posted, the effect is to assign the statement's (or containing script's) standard input to the variable.</p>
<p>The command substitution <code>$(command)</code> will return the command's output; the assignment... | <p><code>cat</code> will catenate its input to its output.</p> <p>In the context of the variable capture you posted, the effect is to assign the statement's (or containing script's) standard input to the variable.</p> <p>The command substitution <code>$(command)</code> will return the command's output; the assignment... | 34, 58, 387, 390 | bash, linux, shell, unix | <h1>Unix: What does cat by itself do?</h1>
<p>I saw the line <code>data=$(cat)</code> in a bash script (just declaring an empty variable) and am mystified as to what that could possibly do. </p>
<p>I read the man pages, but it doesn't have an example or explanation of this. Does this capture stdin or something? Any... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,140 | bash | # Unix: What does cat by itself do?
I saw the line `data=$(cat)` in a bash script (just declaring an empty variable) and am mystified as to what that could possibly do.
I read the man pages, but it doesn't have an example or explanation of this. Does this capture stdin or something? Any documentation on this?
EDIT: ... | `cat` will catenate its input to its output.
In the context of the variable capture you posted, the effect is to assign the statement's (or containing script's) standard input to the variable.
The command substitution `$(command)` will return the command's output; the assignment will assign the substituted string to ... |
27768082 | How can I list and print files in a directory? | 15 | 2015-01-04 17:08:24 | <p>I'm trying this but it doesn't print anything:</p>
<pre><code>Dir -Recurse "C:\temp" | Select Fullname
</code></pre>
<p>Looks like this command just selects file names. I want to see them in console.</p>
| 25,460 | 4,395,371 | 2020-01-15 19:52:31 | 27,768,126 | 13 | 2015-01-04 17:12:33 | 166,712 | 2015-01-04 17:12:33 | https://stackoverflow.com/q/27768082 | https://stackoverflow.com/a/27768126 | <p>Take a look at <a href="http://technet.microsoft.com/en-us/library/hh849800.aspx" rel="noreferrer"><code>Get-Childitem</code></a></p>
<pre><code>Dir -Recurse c:\path\ | Get-Childitem
</code></pre>
| <p>Take a look at <a href="http://technet.microsoft.com/en-us/library/hh849800.aspx" rel="noreferrer"><code>Get-Childitem</code></a></p> <pre><code>Dir -Recurse c:\path\ | Get-Childitem </code></pre> | 526 | powershell | <h1>How can I list and print files in a directory?</h1>
<p>I'm trying this but it doesn't print anything:</p>
<pre><code>Dir -Recurse "C:\temp" | Select Fullname
</code></pre>
<p>Looks like this command just selects file names. I want to see them in console.</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,141 | bash | # How can I list and print files in a directory?
I'm trying this but it doesn't print anything:
```
Dir -Recurse "C:\temp" | Select Fullname
```
Looks like this command just selects file names. I want to see them in console. | Take a look at [`Get-Childitem`](http://technet.microsoft.com/en-us/library/hh849800.aspx)
```
Dir -Recurse c:\path\ | Get-Childitem
``` |
26934506 | Uploading files to s3 using s3cmd in parallel | 15 | 2014-11-14 16:26:19 | <p>I've got a whole heap of files on a server, and I want to upload these onto S3. The files are stored with a .data extension, but really they're just a bunch of jpegs,pngs,zips or pdfs.</p>
<p>I've already written a short script which finds the mime type and uploads them onto S3 and that works but it's slow. Is ther... | 12,826 | 346,271 | 2018-05-02 10:39:57 | 26,939,884 | 13 | 2014-11-14 22:25:51 | 363,028 | 2014-11-14 22:25:51 | https://stackoverflow.com/q/26934506 | https://stackoverflow.com/a/26939884 | <p>You are clearly skilled in writing shell, and extremely close to a solution:</p>
<pre><code>s3upload_single() {
n=$1
data=".data"
extension=`file $n | cut -d ' ' -f2 | awk '{print tolower($0)}'`
mimetype=`file --mime-type $n | cut -d ' ' -f2`
fullpath=`readlink -f $n`
changed="${fullpath/... | <p>You are clearly skilled in writing shell, and extremely close to a solution:</p> <pre><code>s3upload_single() { n=$1 data=".data" extension=`file $n | cut -d ' ' -f2 | awk '{print tolower($0)}'` mimetype=`file --mime-type $n | cut -d ' ' -f2` fullpath=`readlink -f $n` changed="${fullpath/... | 353, 387, 11444, 70637, 82247 | amazon-s3, bash, gnu-parallel, parallel-processing, s3cmd | <h1>Uploading files to s3 using s3cmd in parallel</h1>
<p>I've got a whole heap of files on a server, and I want to upload these onto S3. The files are stored with a .data extension, but really they're just a bunch of jpegs,pngs,zips or pdfs.</p>
<p>I've already written a short script which finds the mime type and upl... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,142 | bash | # Uploading files to s3 using s3cmd in parallel
I've got a whole heap of files on a server, and I want to upload these onto S3. The files are stored with a .data extension, but really they're just a bunch of jpegs,pngs,zips or pdfs.
I've already written a short script which finds the mime type and uploads them onto S... | You are clearly skilled in writing shell, and extremely close to a solution:
```
s3upload_single() {
n=$1
data=".data"
extension=`file $n | cut -d ' ' -f2 | awk '{print tolower($0)}'`
mimetype=`file --mime-type $n | cut -d ' ' -f2`
fullpath=`readlink -f $n`
changed="${fullpath/.data/.$extens... |
22663484 | get "ERROR: Can't get master address from ZooKeeper; znode data == null" when using Hbase shell | 15 | 2014-03-26 14:06:06 | <p>I installed Hadoop2.2.0 and Hbase0.98.0 and here is what I do :</p>
<pre><code>$ ./bin/start-hbase.sh
$ ./bin/hbase shell
2.0.0-p353 :001 > list
</code></pre>
<p>then I got this:</p>
<pre><code>ERROR: Can't get master address from ZooKeeper; znode data == null
</code></pre>
<p>Why am I getting this error ?... | 65,531 | 3,463,279 | 2019-04-07 07:29:45 | 22,670,992 | 13 | 2014-03-26 19:17:17 | 1,183,167 | 2016-12-16 21:48:53 | https://stackoverflow.com/q/22663484 | https://stackoverflow.com/a/22670992 | <p>If you just want to run HBase without going into Zookeeper management for standalone HBase, then remove all the <code>property</code> blocks from <code>hbase-site.xml</code> except the property block named <code>hbase.rootdir</code>. </p>
<p>Now run <code>/bin/start-hbase.sh</code>. HBase comes with its own Zookeep... | <p>If you just want to run HBase without going into Zookeeper management for standalone HBase, then remove all the <code>property</code> blocks from <code>hbase-site.xml</code> except the property block named <code>hbase.rootdir</code>. </p> <p>Now run <code>/bin/start-hbase.sh</code>. HBase comes with its own Zookeep... | 390, 1995, 2394 | hadoop, hbase, shell | <h1>get "ERROR: Can't get master address from ZooKeeper; znode data == null" when using Hbase shell</h1>
<p>I installed Hadoop2.2.0 and Hbase0.98.0 and here is what I do :</p>
<pre><code>$ ./bin/start-hbase.sh
$ ./bin/hbase shell
2.0.0-p353 :001 > list
</code></pre>
<p>then I got this:</p>
<pre><code>ERROR: Ca... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,143 | bash | # get "ERROR: Can't get master address from ZooKeeper; znode data == null" when using Hbase shell
I installed Hadoop2.2.0 and Hbase0.98.0 and here is what I do :
```
$ ./bin/start-hbase.sh
$ ./bin/hbase shell
2.0.0-p353 :001 > list
```
then I got this:
```
ERROR: Can't get master address from ZooKeeper; znode da... | If you just want to run HBase without going into Zookeeper management for standalone HBase, then remove all the `property` blocks from `hbase-site.xml` except the property block named `hbase.rootdir`.
Now run `/bin/start-hbase.sh`. HBase comes with its own Zookeeper, which gets started when you run `/bin/start-hbase.s... |
9120760 | cURL Simple File Upload - 417 Expectation Failed | 15 | 2012-02-02 22:09:54 | <p>I have a problem with a simple file upload post with cURL...
I did it so many times but in this case I always get "417 Expectation Failed" from server.
When I try to post with my browser it works 100% but with cURL not. </p>
<p>That's my configuration:</p>
<p>My simple test form that works:</p>
<pre><code><fo... | 18,624 | 870,412 | 2017-10-30 09:40:07 | 19,250,636 | 13 | 2013-10-08 14:34:11 | 2,681,246 | 2013-10-08 14:34:11 | https://stackoverflow.com/q/9120760 | https://stackoverflow.com/a/19250636 | <p>Can also be fixed using set opt header setting:</p>
<pre><code>curl_setopt($curl,CURLOPT_HTTPHEADER,array("Expect: "));
</code></pre>
<p><a href="http://www.khattam.info/417-expectation-failed-in-php-curl-while-submitting-multi-part-forms-2011-04-14.html">http://www.khattam.info/417-expectation-failed-in-php-curl... | <p>Can also be fixed using set opt header setting:</p> <pre><code>curl_setopt($curl,CURLOPT_HTTPHEADER,array("Expect: ")); </code></pre> <p><a href="http://www.khattam.info/417-expectation-failed-in-php-curl-while-submitting-multi-part-forms-2011-04-14.html">http://www.khattam.info/417-expectation-failed-in-php-curl... | 58, 387, 1554 | bash, curl, linux | <h1>cURL Simple File Upload - 417 Expectation Failed</h1>
<p>I have a problem with a simple file upload post with cURL...
I did it so many times but in this case I always get "417 Expectation Failed" from server.
When I try to post with my browser it works 100% but with cURL not. </p>
<p>That's my configuration:</p>
... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,144 | bash | # cURL Simple File Upload - 417 Expectation Failed
I have a problem with a simple file upload post with cURL...
I did it so many times but in this case I always get "417 Expectation Failed" from server.
When I try to post with my browser it works 100% but with cURL not.
That's my configuration:
My simple test form t... | Can also be fixed using set opt header setting:
```
curl_setopt($curl,CURLOPT_HTTPHEADER,array("Expect: "));
```
<http://www.khattam.info/417-expectation-failed-in-php-curl-while-submitting-multi-part-forms-2011-04-14.html> |
17014478 | What is the meaning of ". filename" (period space filename) in Bash? | 15 | 2013-06-09 21:43:45 | <p>What does a command with format [period][space][filename] mean?</p>
<p>Example:</p>
<pre><code>. ./setup.sh
</code></pre>
<p>Also in the <code>.bashrc</code> file, we have a line like that:</p>
<pre><code>. "$HOME/.bashrc"
</code></pre>
<p>What does this mean?</p>
| 7,423 | 2,446,466 | 2021-07-06 11:39:08 | 17,014,479 | 13 | 2013-06-09 21:43:45 | 2,446,466 | 2019-01-25 15:21:17 | https://stackoverflow.com/q/17014478 | https://stackoverflow.com/a/17014479 | <p>The <code>.</code> operator is also known as <code>source</code>.</p>
<p>According to <a href="http://www.unix.com/shell-programming-scripting/177636-dot-operator-space-parameter-not-set.html" rel="nofollow noreferrer">this forum thread</a>, the first <code>.</code> is the command <code>source</code> to read and ex... | <p>The <code>.</code> operator is also known as <code>source</code>.</p> <p>According to <a href="http://www.unix.com/shell-programming-scripting/177636-dot-operator-space-parameter-not-set.html" rel="nofollow noreferrer">this forum thread</a>, the first <code>.</code> is the command <code>source</code> to read and ex... | 387, 18271 | bash, period | <h1>What is the meaning of ". filename" (period space filename) in Bash?</h1>
<p>What does a command with format [period][space][filename] mean?</p>
<p>Example:</p>
<pre><code>. ./setup.sh
</code></pre>
<p>Also in the <code>.bashrc</code> file, we have a line like that:</p>
<pre><code>. "$HOME/.bashrc"
</code></pre... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,145 | bash | # What is the meaning of ". filename" (period space filename) in Bash?
What does a command with format [period][space][filename] mean?
Example:
```
. ./setup.sh
```
Also in the `.bashrc` file, we have a line like that:
```
. "$HOME/.bashrc"
```
What does this mean? | The `.` operator is also known as `source`.
According to [this forum thread](http://www.unix.com/shell-programming-scripting/177636-dot-operator-space-parameter-not-set.html), the first `.` is the command `source` to read and execute commands from the filename given as argument.
The second `.` is the current directory... |
16157279 | "dynamic operations can only be performed in homogenous appdomain" error while launching PowerShell | 15 | 2013-04-22 21:44:32 | <p>I have a powershell script that I am trying to execute from WCF REST service.I am using the <code>System.Management.Automation</code> and <code>System.Management.Automation.Runspaces</code> assemblies.</p>
<p>The C# code looks like this:</p>
<pre class="lang-cs prettyprint-override"><code>Command command = new Com... | 31,460 | 1,019,042 | 2015-12-23 10:30:25 | 16,159,661 | 13 | 2013-04-23 02:01:20 | 251,123 | 2013-04-23 02:01:20 | https://stackoverflow.com/q/16157279 | https://stackoverflow.com/a/16159661 | <p>I just googled that error and it seemed to be related to <code>legacyCasPolicy</code> being set to true as discussed <a href="https://stackoverflow.com/questions/8761113/dynamic-operations-can-only-be-performed-in-homogenous-appdomain-error">here</a> and <a href="https://stackoverflow.com/questions/5541143/legacycas... | <p>I just googled that error and it seemed to be related to <code>legacyCasPolicy</code> being set to true as discussed <a href="https://stackoverflow.com/questions/8761113/dynamic-operations-can-only-be-performed-in-homogenous-appdomain-error">here</a> and <a href="https://stackoverflow.com/questions/5541143/legacycas... | 526, 1362, 11750 | automation, code-access-security, powershell | <h1>"dynamic operations can only be performed in homogenous appdomain" error while launching PowerShell</h1>
<p>I have a powershell script that I am trying to execute from WCF REST service.I am using the <code>System.Management.Automation</code> and <code>System.Management.Automation.Runspaces</code> assemblies.</p>
<... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,146 | bash | # "dynamic operations can only be performed in homogenous appdomain" error while launching PowerShell
I have a powershell script that I am trying to execute from WCF REST service.I am using the `System.Management.Automation` and `System.Management.Automation.Runspaces` assemblies.
The C# code looks like this:
```
Co... | I just googled that error and it seemed to be related to `legacyCasPolicy` being set to true as discussed [here](https://stackoverflow.com/questions/8761113/dynamic-operations-can-only-be-performed-in-homogenous-appdomain-error) and [here](https://stackoverflow.com/questions/5541143/legacycasmodel-true-and-dynamic-data... |
14598753 | running bash script in cygwin on windows 7 | 15 | 2013-01-30 07:29:54 | <p>I am trying to run the below bash script in cygwin on windows 7</p>
<pre><code>REPEATTIMES="$1"
if [ $# = 0 ]; then
echo "Usage: fetch topN repeatTimes"
exit 1
fi
for (( i=1; i<=$REPEATTIMES; i++ ))
do
echo "ITERATION: $i"
echo "GENERATING"
log=thelogs/log
bin/nutch generate crawl/s... | 26,336 | 328,836 | 2013-05-10 16:51:49 | 14,598,831 | 13 | 2013-01-30 07:36:29 | 1,072,150 | 2013-01-30 07:36:29 | https://stackoverflow.com/q/14598753 | https://stackoverflow.com/a/14598831 | <p>The latest version of Cygwin seems to only support files in Unix format (i.e. with \n for newlines as opposed to the DOS/Windows \r\n newline).</p>
<p>To fix this, run the /bin/dos2unix.exe utility, giving your script as the argument to the command:</p>
<pre><code>e.g. /bin/dos2unix.exe myScript.sh
</code></pre>
... | <p>The latest version of Cygwin seems to only support files in Unix format (i.e. with \n for newlines as opposed to the DOS/Windows \r\n newline).</p> <p>To fix this, run the /bin/dos2unix.exe utility, giving your script as the argument to the command:</p> <pre><code>e.g. /bin/dos2unix.exe myScript.sh </code></pre> ... | 387, 1731, 34595 | bash, cygwin, windows-7 | <h1>running bash script in cygwin on windows 7</h1>
<p>I am trying to run the below bash script in cygwin on windows 7</p>
<pre><code>REPEATTIMES="$1"
if [ $# = 0 ]; then
echo "Usage: fetch topN repeatTimes"
exit 1
fi
for (( i=1; i<=$REPEATTIMES; i++ ))
do
echo "ITERATION: $i"
echo "GENERATING"
... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,147 | bash | # running bash script in cygwin on windows 7
I am trying to run the below bash script in cygwin on windows 7
```
REPEATTIMES="$1"
if [ $# = 0 ]; then
echo "Usage: fetch topN repeatTimes"
exit 1
fi
for (( i=1; i<=$REPEATTIMES; i++ ))
do
echo "ITERATION: $i"
echo "GENERATING"
log=thelogs/log
... | The latest version of Cygwin seems to only support files in Unix format (i.e. with \n for newlines as opposed to the DOS/Windows \r\n newline).
To fix this, run the /bin/dos2unix.exe utility, giving your script as the argument to the command:
```
e.g. /bin/dos2unix.exe myScript.sh
```
This will convert it to Unix fo... |
13631173 | Adding a path to the .bashrc file? | 15 | 2012-11-29 17:17:25 | <p>At the moment I am trying to add a path for ns-2 to my .bashrc file, I have installed the ns-allinone-2.34 but the command ns gives the result: command not found when entered into the shell.</p>
<p>Here is what my .bashrc file currently looks like, I edited it using gedit:</p>
<pre><code># .bashrc
# Source global... | 90,342 | 1,825,241 | 2016-11-08 20:04:47 | 13,631,374 | 13 | 2012-11-29 17:29:27 | 12,960 | 2016-11-08 20:04:47 | https://stackoverflow.com/q/13631173 | https://stackoverflow.com/a/13631374 | <p>The <code>PATH</code> should contain the <em>directory</em> for the binaries, not the binaries themselves.</p>
<p>For example, in the above:</p>
<pre><code>export PATH=/home/michael/ns-allinone-2.34/bin/ns:..
</code></pre>
<p>should actually be:</p>
<pre><code>export PATH=/home/michael/ns-allinone-2.34/bin:...
<... | <p>The <code>PATH</code> should contain the <em>directory</em> for the binaries, not the binaries themselves.</p> <p>For example, in the above:</p> <pre><code>export PATH=/home/michael/ns-allinone-2.34/bin/ns:.. </code></pre> <p>should actually be:</p> <pre><code>export PATH=/home/michael/ns-allinone-2.34/bin:... <... | 387, 5430, 5826, 6268 | bash, edit, fedora, path | <h1>Adding a path to the .bashrc file?</h1>
<p>At the moment I am trying to add a path for ns-2 to my .bashrc file, I have installed the ns-allinone-2.34 but the command ns gives the result: command not found when entered into the shell.</p>
<p>Here is what my .bashrc file currently looks like, I edited it using gedit... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,148 | bash | # Adding a path to the .bashrc file?
At the moment I am trying to add a path for ns-2 to my .bashrc file, I have installed the ns-allinone-2.34 but the command ns gives the result: command not found when entered into the shell.
Here is what my .bashrc file currently looks like, I edited it using gedit:
```
# .bashrc... | The `PATH` should contain the *directory* for the binaries, not the binaries themselves.
For example, in the above:
```
export PATH=/home/michael/ns-allinone-2.34/bin/ns:..
```
should actually be:
```
export PATH=/home/michael/ns-allinone-2.34/bin:...
``` |
11051064 | Execute php script from bash , assign output to a bash variable | 15 | 2012-06-15 12:55:38 | <p>I have a bash script which need to execute some php scripts and to get back the results e.g</p>
<pre><code>#!/bin/bash
/usr/bin/php -f $HOME/lib/get_fifobuild.php
</code></pre>
<p>The script get_fifobuild.php returns an integer which I need to assign into a bash variable. I ll appreciate if someone help me out. <... | 14,682 | 416,100 | 2024-06-08 19:01:28 | 11,051,138 | 13 | 2012-06-15 12:59:47 | 1,437,581 | 2012-06-15 14:49:50 | https://stackoverflow.com/q/11051064 | https://stackoverflow.com/a/11051138 | <pre><code>myvariable=$(/usr/bin/php -f $HOME/lib/get_fifobuild.php)
</code></pre>
<p>Will assign the output from your php script to a variable called "myvariable".</p>
<p><strong>Update</strong>:</p>
<p>This will assign the output of the command to the variable, but as you are still having problems I can perhaps su... | <pre><code>myvariable=$(/usr/bin/php -f $HOME/lib/get_fifobuild.php) </code></pre> <p>Will assign the output from your php script to a variable called "myvariable".</p> <p><strong>Update</strong>:</p> <p>This will assign the output of the command to the variable, but as you are still having problems I can perhaps su... | 5, 387 | bash, php | <h1>Execute php script from bash , assign output to a bash variable</h1>
<p>I have a bash script which need to execute some php scripts and to get back the results e.g</p>
<pre><code>#!/bin/bash
/usr/bin/php -f $HOME/lib/get_fifobuild.php
</code></pre>
<p>The script get_fifobuild.php returns an integer which I need ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,149 | bash | # Execute php script from bash , assign output to a bash variable
I have a bash script which need to execute some php scripts and to get back the results e.g
```
#!/bin/bash
/usr/bin/php -f $HOME/lib/get_fifobuild.php
```
The script get_fifobuild.php returns an integer which I need to assign into a bash variable. I ... | ```
myvariable=$(/usr/bin/php -f $HOME/lib/get_fifobuild.php)
```
Will assign the output from your php script to a variable called "myvariable".
**Update**:
This will assign the output of the command to the variable, but as you are still having problems I can perhaps suggest a few things:
1. you have 'get_builds.ph... |
8903180 | How to use SED without a file with an env var? | 15 | 2012-01-17 23:31:25 | <p>Is it possible to substitute a thing in env var with SED?</p>
<pre><code>$ a='aoeua'
$ sed 's@a@o@g' <$a
bash: aoeua: No such file or directory
$ env|grep "SHELL"
SHELL=/bin/bash
</code></pre>
<p>The output I want is</p>
<pre><code>ooeuo
</code></pre>
<p>replacing each <code>a</code> in <code>'aoeua'</code> w... | 12,487 | 164,148 | 2012-01-18 01:24:58 | 8,903,202 | 13 | 2012-01-17 23:34:02 | 90,848 | 2012-01-17 23:34:02 | https://stackoverflow.com/q/8903180 | https://stackoverflow.com/a/8903202 | <p>Use echo:</p>
<pre><code>$ echo "$a" | sed 's@a@o@g'
</code></pre>
<p>In bash you can also do simple substitutions with the <code>${parameter/pattern/string}</code> syntax. For example:</p>
<pre><code>$ v='aoeua'
$ echo ${v/a/o}
ooeua
</code></pre>
<p>Note that this only replaces the first occurrence of the patt... | <p>Use echo:</p> <pre><code>$ echo "$a" | sed 's@a@o@g' </code></pre> <p>In bash you can also do simple substitutions with the <code>${parameter/pattern/string}</code> syntax. For example:</p> <pre><code>$ v='aoeua' $ echo ${v/a/o} ooeua </code></pre> <p>Note that this only replaces the first occurrence of the patt... | 387, 390, 5282, 9013 | bash, environment-variables, sed, shell | <h1>How to use SED without a file with an env var?</h1>
<p>Is it possible to substitute a thing in env var with SED?</p>
<pre><code>$ a='aoeua'
$ sed 's@a@o@g' <$a
bash: aoeua: No such file or directory
$ env|grep "SHELL"
SHELL=/bin/bash
</code></pre>
<p>The output I want is</p>
<pre><code>ooeuo
</code></pre>
<p... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,150 | bash | # How to use SED without a file with an env var?
Is it possible to substitute a thing in env var with SED?
```
$ a='aoeua'
$ sed 's@a@o@g' <$a
bash: aoeua: No such file or directory
$ env|grep "SHELL"
SHELL=/bin/bash
```
The output I want is
```
ooeuo
```
replacing each `a` in `'aoeua'` with `o`. | Use echo:
```
$ echo "$a" | sed 's@a@o@g'
```
In bash you can also do simple substitutions with the `${parameter/pattern/string}` syntax. For example:
```
$ v='aoeua'
$ echo ${v/a/o}
ooeua
```
Note that this only replaces the first occurrence of the pattern. |
8666954 | How to set up a proxy via bash shell? | 15 | 2011-12-29 10:53:03 | <p>I set up a proxy on Mac via <code>System Preferences -> Network -> Advanced -> Proxies</code>.</p>
<p>Is that possible to do the same programatically via bash shell?</p>
| 54,303 | 247,243 | 2013-11-17 12:36:20 | 8,670,655 | 13 | 2011-12-29 16:46:10 | 89,817 | 2011-12-29 16:46:10 | https://stackoverflow.com/q/8666954 | https://stackoverflow.com/a/8670655 | <p>Yes, using the <code>networksetup</code> command. There are separate options for setting different types of proxies (e.g. <code>-setwebproxy</code>, <code>-setsocksfirewallproxy</code>, etc), and you need to know the name of the primary network "service" (e.g. Ethernet, Airport... basically, the names listed in the... | <p>Yes, using the <code>networksetup</code> command. There are separate options for setting different types of proxies (e.g. <code>-setwebproxy</code>, <code>-setsocksfirewallproxy</code>, etc), and you need to know the name of the primary network "service" (e.g. Ethernet, Airport... basically, the names listed in the... | 369, 387, 390, 760 | bash, macos, proxy, shell | <h1>How to set up a proxy via bash shell?</h1>
<p>I set up a proxy on Mac via <code>System Preferences -> Network -> Advanced -> Proxies</code>.</p>
<p>Is that possible to do the same programatically via bash shell?</p>
| q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,151 | bash | # How to set up a proxy via bash shell?
I set up a proxy on Mac via `System Preferences -> Network -> Advanced -> Proxies`.
Is that possible to do the same programatically via bash shell? | Yes, using the `networksetup` command. There are separate options for setting different types of proxies (e.g. `-setwebproxy`, `-setsocksfirewallproxy`, etc), and you need to know the name of the primary network "service" (e.g. Ethernet, Airport... basically, the names listed in the sidebar of the Network preferences p... |
45147547 | Get only file with given extension in directory | 14 | 2017-07-17 15:00:56 | <p>I have a string variable pointing to a directory. In this directory is a single file with the extension <code>.xyz</code>. How do I get the path to this file, without knowing the file name itself?</p>
<p>I have the following code so far:</p>
<pre><code>$dir = "C:\Temp\MyDir"
$xyzFiles = @(Get-ChildItem "$dir\*.xyz... | 25,374 | 1,400,869 | 2022-09-28 16:10:32 | 45,147,769 | 13 | 2017-07-17 15:11:14 | 4,868,262 | 2022-09-28 16:08:57 | https://stackoverflow.com/q/45147547 | https://stackoverflow.com/a/45147769 | <p>I would recommend using <code>Get-ChildItem</code>'s <code>-include</code> parameter:</p>
<pre><code>Get-ChildItem $dir -include *.xyz
</code></pre>
| <p>I would recommend using <code>Get-ChildItem</code>'s <code>-include</code> parameter:</p> <pre><code>Get-ChildItem $dir -include *.xyz </code></pre> | 526, 108010 | powershell, powershell-5.0 | <h1>Get only file with given extension in directory</h1>
<p>I have a string variable pointing to a directory. In this directory is a single file with the extension <code>.xyz</code>. How do I get the path to this file, without knowing the file name itself?</p>
<p>I have the following code so far:</p>
<pre><code>$dir ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,152 | bash | # Get only file with given extension in directory
I have a string variable pointing to a directory. In this directory is a single file with the extension `.xyz`. How do I get the path to this file, without knowing the file name itself?
I have the following code so far:
```
$dir = "C:\Temp\MyDir"
$xyzFiles = @(Get-Ch... | I would recommend using `Get-ChildItem`'s `-include` parameter:
```
Get-ChildItem $dir -include *.xyz
``` |
35527301 | NPM live-server: command not found | 14 | 2016-02-20 18:29:24 | <p>I install live-server globally with: </p>
<p><code>npm install -g live-server</code> but for some reason it is not be found and I get the following error</p>
<p><code>bash: live-server: command not found</code> after command
<code>live-server</code></p>
<p>Everything is correctly installed:</p>
<pre><code>/User... | 36,407 | 1,173,383 | 2024-02-06 06:29:02 | 35,527,743 | 13 | 2016-02-20 19:07:57 | 3,005,251 | 2016-02-20 19:07:57 | https://stackoverflow.com/q/35527301 | https://stackoverflow.com/a/35527743 | <p>Add the path to your npm installation to your path. Just add this line at the end of <code>.bash_profile</code>. Run it in bash first, to make sure it works before putting it in <code>.bash_profile</code></p>
<pre><code>export PATH=$PATH:/Users/username/npm-global/bin
</code></pre>
| <p>Add the path to your npm installation to your path. Just add this line at the end of <code>.bash_profile</code>. Run it in bash first, to make sure it works before putting it in <code>.bash_profile</code></p> <pre><code>export PATH=$PATH:/Users/username/npm-global/bin </code></pre> | 387, 46426, 61387, 123787 | bash, node.js, npm, npm-live-server | <h1>NPM live-server: command not found</h1>
<p>I install live-server globally with: </p>
<p><code>npm install -g live-server</code> but for some reason it is not be found and I get the following error</p>
<p><code>bash: live-server: command not found</code> after command
<code>live-server</code></p>
<p>Everything i... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,153 | bash | # NPM live-server: command not found
I install live-server globally with:
`npm install -g live-server` but for some reason it is not be found and I get the following error
`bash: live-server: command not found` after command
`live-server`
Everything is correctly installed:
```
/Users/username/npm-global/bin/live-s... | Add the path to your npm installation to your path. Just add this line at the end of `.bash_profile`. Run it in bash first, to make sure it works before putting it in `.bash_profile`
```
export PATH=$PATH:/Users/username/npm-global/bin
``` |
33809210 | What do the $package and $project params contain in a NuGet install.ps1 script? | 14 | 2015-11-19 16:22:04 | <p>I'm writing my first install PowerShell script for a NuGet package. I'm trying to copy a file from the <code>lib</code> folder into the <code>tools</code> folder of another NuGet package. The default install.ps1 script has four parameters, two of which are:</p>
<ul>
<li>$package</li>
<li>$project</li>
</ul>
<p>The... | 3,121 | 3,092,298 | 2021-04-14 11:49:36 | 33,811,810 | 13 | 2015-11-19 18:37:11 | 268,874 | 2021-04-14 11:49:36 | https://stackoverflow.com/q/33809210 | https://stackoverflow.com/a/33811810 | <p>In NuGet 2:</p>
<ul>
<li>$project => <a href="https://msdn.microsoft.com/en-us/library/envdte.project.aspx" rel="nofollow noreferrer">EnvDTE.Project</a> - which is the Visual Studio object model for a project.</li>
<li>$package => <a href="https://github.com/NuGet/NuGet2/blob/d9e597f7164fd776a0b3162c653afce4cc... | <p>In NuGet 2:</p> <ul> <li>$project => <a href="https://msdn.microsoft.com/en-us/library/envdte.project.aspx" rel="nofollow noreferrer">EnvDTE.Project</a> - which is the Visual Studio object model for a project.</li> <li>$package => <a href="https://github.com/NuGet/NuGet2/blob/d9e597f7164fd776a0b3162c653afce4cc... | 526, 62770, 62984, 93364 | nuget, nuget-package, powershell, visual-studio-2013 | <h1>What do the $package and $project params contain in a NuGet install.ps1 script?</h1>
<p>I'm writing my first install PowerShell script for a NuGet package. I'm trying to copy a file from the <code>lib</code> folder into the <code>tools</code> folder of another NuGet package. The default install.ps1 script has four ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,154 | bash | # What do the $package and $project params contain in a NuGet install.ps1 script?
I'm writing my first install PowerShell script for a NuGet package. I'm trying to copy a file from the `lib` folder into the `tools` folder of another NuGet package. The default install.ps1 script has four parameters, two of which are:
... | In NuGet 2:
- $project => [EnvDTE.Project](https://msdn.microsoft.com/en-us/library/envdte.project.aspx) - which is the Visual Studio object model for a project.
- $package => [NuGet.IPackage](https://github.com/NuGet/NuGet2/blob/d9e597f7164fd776a0b3162c653afce4cc7c70d3/src/Core/Packages/IPackage.cs) - the NuGet packa... |
33403037 | powershell tf command not recognized as the name of a cmlet | 14 | 2015-10-28 22:57:53 | <blockquote>
<p>tf : The term 'tf' is not recognized as the name of a cmdlet,
function, script file, or operable program. Check the spelling of the
name, or if a path was included, verify that the path is correct and
try again.</p>
</blockquote>
<p>I set up the environment variable but does not work. tf comma... | 22,640 | 3,939,140 | 2021-04-21 06:05:23 | 33,415,147 | 13 | 2015-10-29 13:08:54 | 5,191,724 | 2015-10-29 13:08:54 | https://stackoverflow.com/q/33403037 | https://stackoverflow.com/a/33415147 | <p>You need to include tf.exe full path. For example, you want to check in files with tf checkin command in PowerShell:</p>
<p><div class="snippet" data-lang="js" data-hide="false">
<div class="snippet-code">
<pre class="snippet-code-html lang-html prettyprint-override"><code>$filePath = "C:\Users\username\Source\Wo... | <p>You need to include tf.exe full path. For example, you want to check in files with tf checkin command in PowerShell:</p> <p><div class="snippet" data-lang="js" data-hide="false"> <div class="snippet-code"> <pre class="snippet-code-html lang-html prettyprint-override"><code>$filePath = "C:\Users\username\Source\Wo... | 526, 733, 93364 | powershell, tfs, visual-studio-2013 | <h1>powershell tf command not recognized as the name of a cmlet</h1>
<blockquote>
<p>tf : The term 'tf' is not recognized as the name of a cmdlet,
function, script file, or operable program. Check the spelling of the
name, or if a path was included, verify that the path is correct and
try again.</p>
</blockquo... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,155 | bash | # powershell tf command not recognized as the name of a cmlet
> tf : The term 'tf' is not recognized as the name of a cmdlet,
> function, script file, or operable program. Check the spelling of the
> name, or if a path was included, verify that the path is correct and
> try again.
I set up the environment variable bu... | You need to include tf.exe full path. For example, you want to check in files with tf checkin command in PowerShell:
```
$filePath = "C:\Users\username\Source\Workspaces\teamproject\solutionname\projectname\Class1.cs"
Set-Alias tfs "C:\Program Files (x86)\Microsoft Visual Studio 12.0\Common7\IDE\tf.exe"
tfs chec... |
24610085 | Minicom send automate script | 14 | 2014-07-07 11:59:24 | <p>I'm using minicom to test my connection on serial port. </p>
<pre><code> sudo minicom -b 115200 -D /dev/ttyS0
</code></pre>
<p>in this way minicom opens its 'console-gui' and allow me to send data.</p>
<p>I send:</p>
<pre><code> atz
</code></pre>
<p>and obtain 'OK'</p>
<pre><code>at
</code></pre>
<p>and obta... | 40,536 | 980,344 | 2018-07-19 13:10:55 | 24,610,742 | 13 | 2014-07-07 12:34:08 | 3,184,706 | 2014-07-07 12:51:07 | https://stackoverflow.com/q/24610085 | https://stackoverflow.com/a/24610742 | <p>Minicom have -S option for executing SCRIPT at startup time,so made a script with your commands like</p>
<pre><code>vi script.txt
send atz
send at
</code></pre>
<p>Run your script with minicom like</p>
<pre><code>minicom -S script.txt
</code></pre>
<p>Also refer <a href="http://www.linuxcommand.org/man_pages/run... | <p>Minicom have -S option for executing SCRIPT at startup time,so made a script with your commands like</p> <pre><code>vi script.txt send atz send at </code></pre> <p>Run your script with minicom like</p> <pre><code>minicom -S script.txt </code></pre> <p>Also refer <a href="http://www.linuxcommand.org/man_pages/run... | 58, 387, 390, 3716 | bash, linux, serial-port, shell | <h1>Minicom send automate script</h1>
<p>I'm using minicom to test my connection on serial port. </p>
<pre><code> sudo minicom -b 115200 -D /dev/ttyS0
</code></pre>
<p>in this way minicom opens its 'console-gui' and allow me to send data.</p>
<p>I send:</p>
<pre><code> atz
</code></pre>
<p>and obtain 'OK'</p>
<p... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,156 | bash | # Minicom send automate script
I'm using minicom to test my connection on serial port.
```
sudo minicom -b 115200 -D /dev/ttyS0
```
in this way minicom opens its 'console-gui' and allow me to send data.
I send:
```
atz
```
and obtain 'OK'
```
at
```
and obtain 'OK'
Ans so on.
I need to run a script that wri... | Minicom have -S option for executing SCRIPT at startup time,so made a script with your commands like
```
vi script.txt
send atz
send at
```
Run your script with minicom like
```
minicom -S script.txt
```
Also refer <http://www.linuxcommand.org/man_pages/runscript1.html> for minicom scripting |
23951346 | Is there a subshell created when I run `sh -c "command"`, a new shell or none of these? | 14 | 2014-05-30 09:34:52 | <p>In bash, when I run the following command:</p>
<pre><code>sh -c "<em>command</em>"</code></pre>
<p>is there created a subshell and then the <code><em>command</em></code> is executed?</p>
<p>My guess is that the command will run in the current shell, but I'm not sure. This guess come from the fact that I already t... | 18,675 | 2,353,900 | 2015-02-19 21:12:07 | 24,041,668 | 13 | 2014-06-04 15:33:34 | 3,569,208 | 2014-06-05 05:52:31 | https://stackoverflow.com/q/23951346 | https://stackoverflow.com/a/24041668 | <p>I think that with examples it's possible to understand the situation<br>
(in my case <code>sh</code> is a symbolic link to <code>/bin/dash</code>).<br>
I did this tests for <code>sh</code>:</p>
<pre><code>echo $$ ; sh -c 'echo $$ ; sh -c '"'"'echo $$'"'"' '
16102
7569
7570
</code></pre>
<p>Three different <code>PI... | <p>I think that with examples it's possible to understand the situation<br> (in my case <code>sh</code> is a symbolic link to <code>/bin/dash</code>).<br> I did this tests for <code>sh</code>:</p> <pre><code>echo $$ ; sh -c 'echo $$ ; sh -c '"'"'echo $$'"'"' ' 16102 7569 7570 </code></pre> <p>Three different <code>PI... | 387, 1231 | bash, command-line | <h1>Is there a subshell created when I run `sh -c "command"`, a new shell or none of these?</h1>
<p>In bash, when I run the following command:</p>
<pre><code>sh -c "<em>command</em>"</code></pre>
<p>is there created a subshell and then the <code><em>command</em></code> is executed?</p>
<p>My guess is that the comman... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,157 | bash | # Is there a subshell created when I run `sh -c "command"`, a new shell or none of these?
In bash, when I run the following command:
```
sh -c "command"
```
is there created a subshell and then the `command` is executed?
My guess is that the command will run in the current shell, but I'm not sure. This guess come f... | I think that with examples it's possible to understand the situation
(in my case `sh` is a symbolic link to `/bin/dash`).
I did this tests for `sh`:
```
echo $$ ; sh -c 'echo $$ ; sh -c '"'"'echo $$'"'"' '
16102
7569
7570
```
Three different `PID`, three different `shell`. (If there are different *shells*, there ... |
22793713 | How to set a shell exit trap from within a function in zsh and bash | 14 | 2014-04-01 18:16:23 | <p>Consider the following shell function:</p>
<pre><code>f() {
echo "function"
trap 'echo trap; sleep 1' EXIT
}
</code></pre>
<p>Under bash this will print the following:</p>
<pre><code>~$ f
function
~$ exit
trap
</code></pre>
<p>On zsh however this is the result:</p>
<pre><code>~$ f
function
trap
~$ exit
... | 4,807 | 107,946 | 2014-04-01 18:49:24 | 22,794,374 | 13 | 2014-04-01 18:49:24 | 1,899,640 | 2014-04-01 18:49:24 | https://stackoverflow.com/q/22793713 | https://stackoverflow.com/a/22794374 | <p>Obligatory boring and uninteresting answer:</p>
<pre><code>f() {
if [ "$ZSH_VERSION" ]
then
zshexit() { echo trap; sleep 1; } # zsh specific
else
trap 'echo trap; sleep 1' EXIT # POSIX
fi
}
</code></pre>
| <p>Obligatory boring and uninteresting answer:</p> <pre><code>f() { if [ "$ZSH_VERSION" ] then zshexit() { echo trap; sleep 1; } # zsh specific else trap 'echo trap; sleep 1' EXIT # POSIX fi } </code></pre> | 387, 390, 3791 | bash, shell, zsh | <h1>How to set a shell exit trap from within a function in zsh and bash</h1>
<p>Consider the following shell function:</p>
<pre><code>f() {
echo "function"
trap 'echo trap; sleep 1' EXIT
}
</code></pre>
<p>Under bash this will print the following:</p>
<pre><code>~$ f
function
~$ exit
trap
</code></pre>
<p>O... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,158 | bash | # How to set a shell exit trap from within a function in zsh and bash
Consider the following shell function:
```
f() {
echo "function"
trap 'echo trap; sleep 1' EXIT
}
```
Under bash this will print the following:
```
~$ f
function
~$ exit
trap
```
On zsh however this is the result:
```
~$ f
function
trap... | Obligatory boring and uninteresting answer:
```
f() {
if [ "$ZSH_VERSION" ]
then
zshexit() { echo trap; sleep 1; } # zsh specific
else
trap 'echo trap; sleep 1' EXIT # POSIX
fi
}
``` |
19246065 | Python in Emacs shell-mode turns on stty echo and breaks C-d | 14 | 2013-10-08 11:06:08 | <p>When I run an interactive Python inside an Emacs shell buffer (M-x shell), it does two surprising things to the TTY. First, it turns on input echo, which persists after Python exits, until I do stty -echo. Secondly, it doesn't accept C-d (or C-q C-d, i.e. ^D) as EOF: I have to type quit() to leave the Python. How... | 1,570 | 2,444,191 | 2022-10-06 13:43:47 | 19,251,659 | 13 | 2013-10-08 15:15:18 | 68,063 | 2018-12-06 18:37:51 | https://stackoverflow.com/q/19246065 | https://stackoverflow.com/a/19251659 | <h3>0. Summary</h3>
<p>If you installed Python via Macports, install the py27-gnureadline port (or py37-gnureadline, or whatever your version is) and the problem is fixed.</p>
<h3>1. Reproduction</h3>
<p>I can reproduce this (GNU Emacs 23.4.1; OS X 10.8.5; Python 3.3.2). Here's a session in a fresh <code>emacs -Q</c... | <h3>0. Summary</h3> <p>If you installed Python via Macports, install the py27-gnureadline port (or py37-gnureadline, or whatever your version is) and the problem is fixed.</p> <h3>1. Reproduction</h3> <p>I can reproduce this (GNU Emacs 23.4.1; OS X 10.8.5; Python 3.3.2). Here's a session in a fresh <code>emacs -Q</c... | 16, 369, 371, 390, 17165 | emacs, macos, python, shell, tty | <h1>Python in Emacs shell-mode turns on stty echo and breaks C-d</h1>
<p>When I run an interactive Python inside an Emacs shell buffer (M-x shell), it does two surprising things to the TTY. First, it turns on input echo, which persists after Python exits, until I do stty -echo. Secondly, it doesn't accept C-d (or C-q... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,159 | bash | # Python in Emacs shell-mode turns on stty echo and breaks C-d
When I run an interactive Python inside an Emacs shell buffer (M-x shell), it does two surprising things to the TTY. First, it turns on input echo, which persists after Python exits, until I do stty -echo. Secondly, it doesn't accept C-d (or C-q C-d, i.e. ... | ### 0. Summary
If you installed Python via Macports, install the py27-gnureadline port (or py37-gnureadline, or whatever your version is) and the problem is fixed.
### 1. Reproduction
I can reproduce this (GNU Emacs 23.4.1; OS X 10.8.5; Python 3.3.2). Here's a session in a fresh `emacs -Q` showing the problem:
```
... |
17809912 | Parsing iw wlan0 scan output | 14 | 2013-07-23 12:13:49 | <p>I wrote wlan manager script to handle open/ad-hoc/wep/wpa2 networks. Now im trying to parse iw wlan0 scan output to get nice scan feature to my script. My goal is to get output like this :</p>
<pre><code>SSID channel signal encryption
wlan-ap 6 70% wpa2-psk
test 1 ... | 40,197 | 1,279,530 | 2025-02-23 17:55:31 | 17,880,517 | 13 | 2013-07-26 11:47:48 | 1,279,530 | 2013-07-26 12:10:59 | https://stackoverflow.com/q/17809912 | https://stackoverflow.com/a/17880517 | <p>Here is my final solution based of <a href="https://stackoverflow.com/a/17810551/1066031">Sudo_O answer</a>:</p>
<pre><code>$1 == "BSS" {
MAC = $2
wifi[MAC]["enc"] = "Open"
}
$1 == "SSID:" {
wifi[MAC]["SSID"] = $2
}
$1 == "freq:" {
wifi[MAC]["freq"] = $NF
}
$1 == "signal:" {
wifi[MAC]["sig"] = $... | <p>Here is my final solution based of <a href="https://stackoverflow.com/a/17810551/1066031">Sudo_O answer</a>:</p> <pre><code>$1 == "BSS" { MAC = $2 wifi[MAC]["enc"] = "Open" } $1 == "SSID:" { wifi[MAC]["SSID"] = $2 } $1 == "freq:" { wifi[MAC]["freq"] = $NF } $1 == "signal:" { wifi[MAC]["sig"] = $... | 387, 990, 1357, 5282 | awk, bash, parsing, sed | <h1>Parsing iw wlan0 scan output</h1>
<p>I wrote wlan manager script to handle open/ad-hoc/wep/wpa2 networks. Now im trying to parse iw wlan0 scan output to get nice scan feature to my script. My goal is to get output like this :</p>
<pre><code>SSID channel signal encryption
wlan-ap 6 70%... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,160 | bash | # Parsing iw wlan0 scan output
I wrote wlan manager script to handle open/ad-hoc/wep/wpa2 networks. Now im trying to parse iw wlan0 scan output to get nice scan feature to my script. My goal is to get output like this :
```
SSID channel signal encryption
wlan-ap 6 70% wpa2-psk
te... | Here is my final solution based of [Sudo_O answer](https://stackoverflow.com/a/17810551/1066031):
```
$1 == "BSS" {
MAC = $2
wifi[MAC]["enc"] = "Open"
}
$1 == "SSID:" {
wifi[MAC]["SSID"] = $2
}
$1 == "freq:" {
wifi[MAC]["freq"] = $NF
}
$1 == "signal:" {
wifi[MAC]["sig"] = $2 " " $3
}
$1 == "WPA:" {... |
17821277 | How to separate multiple commands passed to eval in bash | 14 | 2013-07-23 21:17:56 | <p>I'm trying to evaluate multiple lines of shell commands using <code>eval</code>, but when I try to resolve variables with eval separated by a newline <code>\n</code> the variables are not resolved.</p>
<pre><code>x='echo a'
y='echo b'
z="$x\n$y"
eval $x
eval $y
eval $z
</code></pre>
<p>Which outputs:</p>
<pre><co... | 17,956 | 559,676 | 2021-06-11 05:14:13 | 17,837,110 | 13 | 2013-07-24 14:34:32 | 89,817 | 2013-07-24 14:34:32 | https://stackoverflow.com/q/17821277 | https://stackoverflow.com/a/17837110 | <p><code>\n</code> is not a newline; it's an escape sequence that <em>in some situations</em> will be translated into a newline, but you haven't used it in one of those situations. The variable <code>$z</code> doesn't wind up containing a newline, just backslash followed by "n". As a result, this is what's actually bei... | <p><code>\n</code> is not a newline; it's an escape sequence that <em>in some situations</em> will be translated into a newline, but you haven't used it in one of those situations. The variable <code>$z</code> doesn't wind up containing a newline, just backslash followed by "n". As a result, this is what's actually bei... | 387, 390, 4413 | bash, eval, shell | <h1>How to separate multiple commands passed to eval in bash</h1>
<p>I'm trying to evaluate multiple lines of shell commands using <code>eval</code>, but when I try to resolve variables with eval separated by a newline <code>\n</code> the variables are not resolved.</p>
<pre><code>x='echo a'
y='echo b'
z="$x\n$y"
eval... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,161 | bash | # How to separate multiple commands passed to eval in bash
I'm trying to evaluate multiple lines of shell commands using `eval`, but when I try to resolve variables with eval separated by a newline `\n` the variables are not resolved.
```
x='echo a'
y='echo b'
z="$x\n$y"
eval $x
eval $y
eval $z
```
Which outputs:
`... | `\n` is not a newline; it's an escape sequence that *in some situations* will be translated into a newline, but you haven't used it in one of those situations. The variable `$z` doesn't wind up containing a newline, just backslash followed by "n". As a result, this is what's actually being executed:
```
$ echo a\necho... |
14335825 | Execute single command in shell script without sudo | 14 | 2013-01-15 10:34:11 | <p>I have a simple shell script that is run with sudo as most of the script requires it, yet one of the commands in the script is a Homebrew install, which cannot be executed with sudo..</p>
<p>So, my question is when executing a shell script with sudo how do I execute sub commands as the current user and then continu... | 5,836 | 591,969 | 2013-01-15 12:47:51 | 14,336,073 | 13 | 2013-01-15 10:48:10 | 1,978,011 | 2013-01-15 10:48:10 | https://stackoverflow.com/q/14335825 | https://stackoverflow.com/a/14336073 | <p>The easiest way is to run the subcommand via <code>sudo</code> from within the script. The user id to run with can be obtained by $SUDO_USER (look at the output of <code>sudo env</code>):</p>
<pre><code>sudo -u $SUDO_USER ./exec_as_normal_user.sh
</code></pre>
| <p>The easiest way is to run the subcommand via <code>sudo</code> from within the script. The user id to run with can be obtained by $SUDO_USER (look at the output of <code>sudo env</code>):</p> <pre><code>sudo -u $SUDO_USER ./exec_as_normal_user.sh </code></pre> | 387, 1067, 1674 | bash, homebrew, sudo | <h1>Execute single command in shell script without sudo</h1>
<p>I have a simple shell script that is run with sudo as most of the script requires it, yet one of the commands in the script is a Homebrew install, which cannot be executed with sudo..</p>
<p>So, my question is when executing a shell script with sudo how d... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,162 | bash | # Execute single command in shell script without sudo
I have a simple shell script that is run with sudo as most of the script requires it, yet one of the commands in the script is a Homebrew install, which cannot be executed with sudo..
So, my question is when executing a shell script with sudo how do I execute sub ... | The easiest way is to run the subcommand via `sudo` from within the script. The user id to run with can be obtained by $SUDO_USER (look at the output of `sudo env`):
```
sudo -u $SUDO_USER ./exec_as_normal_user.sh
``` |
12133062 | Formatting lists with the column command in *nix | 14 | 2012-08-26 19:08:04 | <p>I'm trying to format a list of entries in bash, and am using the <code>column</code> command. However, the <code>-t</code> option defaults to using any whitespace as a delimiter, which does not work for the data I have (it contains spaces and tabs). I can't figure out how to get the <code>-s</code> flag to specify a... | 22,138 | 1,626,213 | 2012-12-20 02:07:56 | 12,134,722 | 13 | 2012-08-26 23:27:19 | 978,917 | 2012-08-26 23:27:19 | https://stackoverflow.com/q/12133062 | https://stackoverflow.com/a/12134722 | <p>In theory, to specify a newline, you can use the <code>$'...'</code> notation, which is just like <code>'...'</code> except that it supports C-style escape-sequences:</p>
<pre><code>column -t -s $'\n' list-of-entries.txt
</code></pre>
<p>However, I don't really understand the purpose of this. A newline is the row ... | <p>In theory, to specify a newline, you can use the <code>$'...'</code> notation, which is just like <code>'...'</code> except that it supports C-style escape-sequences:</p> <pre><code>column -t -s $'\n' list-of-entries.txt </code></pre> <p>However, I don't really understand the purpose of this. A newline is the row ... | 34, 58, 387, 390, 555 | bash, formatting, linux, shell, unix | <h1>Formatting lists with the column command in *nix</h1>
<p>I'm trying to format a list of entries in bash, and am using the <code>column</code> command. However, the <code>-t</code> option defaults to using any whitespace as a delimiter, which does not work for the data I have (it contains spaces and tabs). I can't f... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,163 | bash | # Formatting lists with the column command in *nix
I'm trying to format a list of entries in bash, and am using the `column` command. However, the `-t` option defaults to using any whitespace as a delimiter, which does not work for the data I have (it contains spaces and tabs). I can't figure out how to get the `-s` f... | In theory, to specify a newline, you can use the `$'...'` notation, which is just like `'...'` except that it supports C-style escape-sequences:
```
column -t -s $'\n' list-of-entries.txt
```
However, I don't really understand the purpose of this. A newline is the row delimiter, so a column-delimiter of `$'\n'` is eq... |
9328777 | ValueFromPipeline behavior? | 14 | 2012-02-17 13:07:03 | <p>I have a command <code>Get-Testdata</code> that retrieves test data from different sources and stores these into a <code>PSObject</code> with the different values as properties. The total number of objects are then stored as an array, for easy manipulation, sorting, calculating etc.</p>
<p>My problem is that I want... | 17,147 | 662,388 | 2018-07-30 20:28:00 | 9,329,145 | 13 | 2012-02-17 13:32:26 | 75,224 | 2012-02-17 14:59:05 | https://stackoverflow.com/q/9328777 | https://stackoverflow.com/a/9329145 | <p>You probably process data in end block, not process block.</p>
<p>Look at an example:</p>
<pre><code>function getdata {
1
2
3
4
}
function show-data {
param(
[Parameter(mandatory=$true, ValueFromPipeline=$true)]$InputObject,
[Parameter(mandatory=$true)]$FileName
)
# thi... | <p>You probably process data in end block, not process block.</p> <p>Look at an example:</p> <pre><code>function getdata { 1 2 3 4 } function show-data { param( [Parameter(mandatory=$true, ValueFromPipeline=$true)]$InputObject, [Parameter(mandatory=$true)]$FileName ) # thi... | 526 | powershell | <h1>ValueFromPipeline behavior?</h1>
<p>I have a command <code>Get-Testdata</code> that retrieves test data from different sources and stores these into a <code>PSObject</code> with the different values as properties. The total number of objects are then stored as an array, for easy manipulation, sorting, calculating e... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,164 | bash | # ValueFromPipeline behavior?
I have a command `Get-Testdata` that retrieves test data from different sources and stores these into a `PSObject` with the different values as properties. The total number of objects are then stored as an array, for easy manipulation, sorting, calculating etc.
My problem is that I want ... | You probably process data in end block, not process block.
Look at an example:
```
function getdata {
1
2
3
4
}
function show-data {
param(
[Parameter(mandatory=$true, ValueFromPipeline=$true)]$InputObject,
[Parameter(mandatory=$true)]$FileName
)
# this is process block th... |
9109362 | Bash subshell/pipelines - which parts are executing in subshells? | 14 | 2012-02-02 08:47:27 | <p>In a <a href="https://stackoverflow.com/questions/9108181/append-output-of-one-command-to-the-output-of-another-in-a-single-command/9108410#comment11442552_9108410">comment on another post</a>, @JonathanLeffler stated that:</p>
<blockquote>
<p>{ ... } | somecommand is run in a sub-shell and doesn't affect the
p... | 3,484 | 128,625 | 2024-01-11 10:01:13 | 9,109,654 | 13 | 2012-02-02 09:10:34 | 126,769 | 2024-01-11 10:01:13 | https://stackoverflow.com/q/9109362 | https://stackoverflow.com/a/9109654 | <p>Each side of a pipeline becomes a subshell at least.</p>
<pre><code>X=PQR; echo $X; { X=ABC; echo $X; } | cat; echo $X
</code></pre>
<p>will make a subshell/process of , atleast <code>{ X=ABC; echo $X; }</code> and <code>cat</code>.</p>
<p>"Each command in a pipeline is executed as a separate process (i.e., in ... | <p>Each side of a pipeline becomes a subshell at least.</p> <pre><code>X=PQR; echo $X; { X=ABC; echo $X; } | cat; echo $X </code></pre> <p>will make a subshell/process of , atleast <code>{ X=ABC; echo $X; }</code> and <code>cat</code>.</p> <p>"Each command in a pipeline is executed as a separate process (i.e., in ... | 387 | bash | <h1>Bash subshell/pipelines - which parts are executing in subshells?</h1>
<p>In a <a href="https://stackoverflow.com/questions/9108181/append-output-of-one-command-to-the-output-of-another-in-a-single-command/9108410#comment11442552_9108410">comment on another post</a>, @JonathanLeffler stated that:</p>
<blockquote>
... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,165 | bash | # Bash subshell/pipelines - which parts are executing in subshells?
In a [comment on another post](https://stackoverflow.com/questions/9108181/append-output-of-one-command-to-the-output-of-another-in-a-single-command/9108410#comment11442552_9108410), @JonathanLeffler stated that:
> { ... } | somecommand is run in a s... | Each side of a pipeline becomes a subshell at least.
```
X=PQR; echo $X; { X=ABC; echo $X; } | cat; echo $X
```
will make a subshell/process of , atleast `{ X=ABC; echo $X; }` and `cat`.
"Each command in a pipeline is executed as a separate process (i.e., in a subshell)." , from man bash
If you instead do this
```... |
8152937 | running nohup command on script that takes all parameters | 14 | 2011-11-16 14:06:20 | <p>I am trying to run a script with nohup, but the command happens to take an
entire line of parameters with the variable $*. I try running the command like this:</p>
<pre><code> nohup time ./build_all all &
</code></pre>
<p>But this is giving me the following error in nohup.out:</p>
<pre><code>./build_all:... | 28,257 | 487,980 | 2011-11-16 20:44:44 | 8,153,324 | 13 | 2011-11-16 14:34:11 | 977,484 | 2011-11-16 14:34:11 | https://stackoverflow.com/q/8152937 | https://stackoverflow.com/a/8153324 | <p>Simply place the arguments to “build_all” on the command line, as for any other command:</p>
<pre><code>nohup time ./build_all args to build_all go here &
</code></pre>
<p>and the arguments will be passed to “build_all”, not to “time” or “nohup”. The ampersand will be interpreted correctly by the shell, and wi... | <p>Simply place the arguments to “build_all” on the command line, as for any other command:</p> <pre><code>nohup time ./build_all args to build_all go here & </code></pre> <p>and the arguments will be passed to “build_all”, not to “time” or “nohup”. The ampersand will be interpreted correctly by the shell, and wi... | 387, 18966 | bash, nohup | <h1>running nohup command on script that takes all parameters</h1>
<p>I am trying to run a script with nohup, but the command happens to take an
entire line of parameters with the variable $*. I try running the command like this:</p>
<pre><code> nohup time ./build_all all &
</code></pre>
<p>But this is givin... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,166 | bash | # running nohup command on script that takes all parameters
I am trying to run a script with nohup, but the command happens to take an
entire line of parameters with the variable $*. I try running the command like this:
```
nohup time ./build_all all &
```
But this is giving me the following error in nohup.out:
... | Simply place the arguments to “build_all” on the command line, as for any other command:
```
nohup time ./build_all args to build_all go here &
```
and the arguments will be passed to “build_all”, not to “time” or “nohup”. The ampersand will be interpreted correctly by the shell, and will not be passed as an argument... |
4711465 | using "touch" to create directories? | 14 | 2011-01-17 09:04:03 | <p>1) in the "A" directory:</p>
<pre><code>find . -type f > a.txt
</code></pre>
<p>2) in the "B" directory:</p>
<pre><code>cat a.txt | while read FILENAMES; do touch "$FILENAMES"; done
</code></pre>
<p>3) Result: the 2) "creates the files" [i mean only with the same filename, but with 0 Byte size] ok. But if the... | 36,058 | 752,665 | 2011-01-17 09:23:42 | 4,711,489 | 13 | 2011-01-17 09:07:47 | 507,519 | 2011-01-17 09:23:42 | https://stackoverflow.com/q/4711465 | https://stackoverflow.com/a/4711489 | <p>Since <code>find</code> outputs one file per line:</p>
<pre><code>cat a.txt | while read file; do
if [[ "$file" = */* ]]; then
mkdir -p "${file%/*}";
fi;
touch "$file";
done
</code></pre>
<p>EDIT:</p>
<p>This would be slightly more efficient if the directories where created in a separate step... | <p>Since <code>find</code> outputs one file per line:</p> <pre><code>cat a.txt | while read file; do if [[ "$file" = */* ]]; then mkdir -p "${file%/*}"; fi; touch "$file"; done </code></pre> <p>EDIT:</p> <p>This would be slightly more efficient if the directories where created in a separate step... | 58, 387 | bash, linux | <h1>using "touch" to create directories?</h1>
<p>1) in the "A" directory:</p>
<pre><code>find . -type f > a.txt
</code></pre>
<p>2) in the "B" directory:</p>
<pre><code>cat a.txt | while read FILENAMES; do touch "$FILENAMES"; done
</code></pre>
<p>3) Result: the 2) "creates the files" [i mean only with the same ... | q.PostTypeId = 1; a.PostTypeId = 2; EXISTS tag '%bash%' OR '%shell%'; a.Body contains code block; q.Score > 5; a.Score > 10 | 10,167 | bash | # using "touch" to create directories?
1) in the "A" directory:
```
find . -type f > a.txt
```
2) in the "B" directory:
```
cat a.txt | while read FILENAMES; do touch "$FILENAMES"; done
```
3) Result: the 2) "creates the files" [i mean only with the same filename, but with 0 Byte size] ok. But if there are subdirs... | Since `find` outputs one file per line:
```
cat a.txt | while read file; do
if [[ "$file" = */* ]]; then
mkdir -p "${file%/*}";
fi;
touch "$file";
done
```
EDIT:
This would be slightly more efficient if the directories where created in a separate step:
```
cat a.txt | grep / | sed 's|/[^/]*$||'... |
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