Commands using ps (300)

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Clean up after a poorly-formed tar file
These days, most software distributed in tar files will just contain a directory at the top level, but some tar files don't have this and can leave you with a mess of files in the current folder if you blindly execute $ tar zxvf something.tar.gz This command can help you clean up after such a mistake. However, note that this has the potential to do bad things if someone has been *really* nasty with filenames.

delete all leading and trailing whitespace from each line in file

Retrieve the size of a file on a server
- Where $URL is the URL of the file. - Replace the $2 by $3 at the end to get a human-readable size. Credits to svanberg @ ArchLinux forums for original idea. Edit: Replaced command with better version by FRUiT. (removed unnecessary grep)

find directory with most inodes/files
Find which directory in one filesystem that contains most inodes or files.

Simple Gumblar check command

Multi-thread any command
For instance: $ find . -type f -name '*.wav' -print0 |xargs -0 -P 3 -n 1 flac -V8 will encode all .wav files into FLAC in parallel. Explanation of xargs flags: -P [max-procs]: Max number of invocations to run at once. Set to 0 to run all at once [potentially dangerous re: excessive RAM usage]. -n [max-args]: Max number of arguments from the list to send to each invocation. -0: Stdin is a null-terminated list. I use xargs to build parallel-processing frameworks into my scripts like the one here: http://pastebin.com/1GvcifYa

kill all process that belongs to you
This will probably kill any user sessions and/or ssh connections to other servers you might have active.

Speed up upgrades for a debian/ubuntu based system.
Please install aria2c before you try the above command. On ubuntu the command to install aria2c would be: $sudo aptitude install aria2

Advanced python tracing
Trace python statement execution and syscalls invoked during that simultaneously

duration of the DNS-query


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