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What does `kill -0 $pid` in a shell script do?
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kill(1)
$ man 1 kill
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If sig is 0, then no signal is sent, but error checking is still performed.
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kill(2)
$ man 2 kill
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If sig is 0, then no signal is sent, but error checking is still performed; this
can be used to check for the existence of a process ID or process group ID.
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Constant pointer vs Pointer to constant [duplicate]
...pointer
constant_pointer.c: In function ‘main’:
constant_pointer.c:13: error: increment of read-only variable ‘ptr’
Hence we see very clearly above that compiler complains that we cannot changes the address held by a constant pointer.
Pointer to Constants
#include<stdio.h>
int mai...
Using wget to recursively fetch a directory with arbitrary files in it
I have a web directory where I store some config files. I'd like to use wget to pull those files down and maintain their current structure. For instance, the remote directory looks like:
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Download a specific tag with Git
...upports that.
– lzap
Jul 8 '14 at 9:05
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How to open a specific port such as 9090 in Google Compute Engine
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ERROR: (gcloud.compute.firewall-rules.create) Could not fetch resource: - Insufficient Permission @modulitos
– alper
Mar 6 '18 at 8:53
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List of zeros in python [duplicate]
How can I create a list which contains only zeros? I want to be able to create a zeros list for each int in range(10)
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File upload progress bar with jQuery
... Hello Jam,i implemented ur code but getting 500 internal server error.
– Pramod Pandey
Apr 20 '13 at 7:57
6
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Footnotes for tables in LaTeX
When I do \footnote{} for a value in a table, the footnote doesn't show up. How do I get it to show up? Also, is it possible to get it to show up at the bottom of the table rather than the bottom of the page?
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How to specify the default error page in web.xml?
I am using <error-page> element in web.xml to specify the friendly error page when user encounters a certain error such as error with code of 404:
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How to apply shell command to each line of a command output?
Suppose I have some output from a command (such as ls -1 ):
8 Answers
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