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Catch a proccess from a user and strace it.
It sits there in a loop waiting for a proccess from that user to spawn. When it does it will attach strace to it

Convert spaces in file names to underscores

Add a progress counter to loop (see sample output)
For this hack you need following function: $ finit() { count=$#; current=1; for i in "$@" ; do echo $current $count; echo $i; current=$((current + 1)); done; } and alias: $ alias fnext='read cur total && echo -n "[$cur/$total] " && read' Inspired by CMake progress counters.

Create QR codes from a URL.
like 7300, but doesn't clutter your working directory with old qr.*.png files. This will get the QR barcode, and send it right into ImageMagick's 'display' tool. Usage is the same as 7300; just call this function followed by the URL: $ qrurl http://xkcd.com

One liner to kill a process when knowing only the port where the process is running

runs a X session within your X session
http://www.debian-administration.org/article/Running_multiple_X11_sessions

Calculate N!
Same as the seq/bc solution but without bc.

Restart X11 with HUP signal

switch case of a text file

How To Display Bash History Without Line Numbers
userful for direct copy & paste command for doumenation or next using


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