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Set a user password without passwd
Slightly shorter. It doesn't create a subprocess either.

Locate config files of the program
Locate config files of the program. May not be used for interactive programs like vim.

Get first Git commit hash
https://git.kernel.org/cgit/git/git.git/commit/?id=ad5aeeded3295589b2573b143f754762a56f8f82

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Get the total length of all videos in the current dir in H:m:s
You're behind on your TV catch-up, but how far behind? This command tries to open mplayer against all files in the current dir. If it's a video file it will contain ID_LENGTH, which is summed and output in hours, minutes and seconds. Someone better at awk could probably reduce this down a lot.

Prevent shell autologout
Unset TMOUT or set it to 0 in order to prevent shell autologout. TMOUT is the number of seconds after which the present shell will be killed if it has been idle for that long.

ettercap..
There weren't any one liners for ettercap on this site... tisk tisk :-) (of course you'll have to plugin your own values for the variables..)

Upload folder to imageshack.us (forum)
Each file in the current folder is uploaded to imageshack.us If the folder contains other filetypes change: $for files in * to: $for files in *.jpg (to upload ONLY .jpg files) Additionally you can try (results may vary): $for files in *.jpg *.png The output URL is encased with BB image tags for use in a forum.

list services running (as root)
A quick way to list services running

List of services sorted by boot order in Redhat-based systems


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