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Bash command to sum a column of numbers [duplicate]
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@unhammer: I don't have access to 7th Edition UNIX and its version of awk any more. I don't know whether the one-line would have worked there, but I didn't try it back then when I learned awk. You're probably right; all current versions of awk are likely to support the...
Bash/sh - difference between && and ;
... 0).
This is covered in the bash manpage under Lists. I would expect any Unix-like shell to support both of these operators, but I don't know specifically about the Android shell.
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Really killing a process in Windows
....technet.com/markrussinovich/archive/2005/08/17/unkillable-processes.aspx
Unix based systems like Linux also have that problem where processes could survive a kill -9 if they are in what's known as "Uninterruptible sleep" (shown by top and ps as state D) at which point the processes sleep so well t...
Convert tabs to spaces in Notepad++
...e by case decision is not needed. It is exactly what the expand command in UNIX does
– Paralife
Apr 15 '11 at 9:38
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Efficiently test if a port is open on Linux?
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@Sean unix commands typically return '0' to indicate success and non-zero for failure. So '0' indicates that it successfully connected and non-zero that it didn't connect for some reason. Note, however, that some versions of 'nc' d...
find: missing argument to -exec
...ormation:
I have just tried using "find -exec" command on a Cygwin system (UNIX emulated on Windows), and there it seems that the backslash before the semicolon must be removed:
find ./ -name "blabla" -exec wc -l {} ;
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How to represent multiple conditions in a shell if statement?
...for backwards compatibility (since they were a part of test in 7th Edition UNIX, for example), but they are explicitly marked as 'obsolescent' by POSIX. Bash (see conditional expressions) seems to preempt the classic and POSIX meanings for -a and -o with its own alternative operators that take argu...
Use space as a delimiter with cut command
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From a linux/unix perspective, \ was my first attempt and it worked. I agree it is less obvious when compared to ' ', but I'm sure many are glad to read it here as reassurance of behavior. For a better understanding, please see @mkleme...
How can I create directories recursively? [duplicate]
...th Cat Plus Plus's answer. However, if you know this will only be used on Unix-like OSes, you can use external calls to the shell commands mkdir, chmod, and chown. Make sure to pass extra flags to recursively affect directories:
>>> import subprocess
>>> subprocess.check_output([...
Prevent nginx 504 Gateway timeout using PHP set_time_limit()
...tire location block looks like this:
location ~ \.php$ {
fastcgi_pass unix:/var/run/php5-fpm.sock;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_read_timeout 180;
include fastcgi_params;
}
Now just restart php-fpm and ngi...