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Have a smile
Outputs utf-8 smileys

See system users

Run a script in parrallel over ssh
Runs a local script over ssh assuming ssh keys are in place. -P argument prints results to stdout. # Uses - https://code.google.com/p/parallel-ssh/

Run a command as root, with a delay
$ sleep 1h ; sudo command or $ sudo sleep 1h ; sudo command won't work, because by the time the delay is up, sudo will want your password again.

Remove a line from a file using sed (useful for updating known SSH server keys when they change)
remove the host for the .ssh/know_host file

Amazing real time picture of the sun in your wallpaper
Changes the wallpaper for the last IR picture of the sun taken by SOHO satellite. Lesser size, try $ curl http://sohowww.nascom.nasa.gov/data/realtime/eit_195/512/latest.jpg | xli -onroot -fullscreen -xzoom 120 -yzoom 120 -border black stdin I use inside kalarm(kde), updating every 15 minutes needs xli , curl

Bash: escape '-' character in filename
If you don't escape the - of the filename, you will get the command interpreting it as a parameter, returning (in the best case) an error.

Upgrade pip-installed python packages

make, or run a script, everytime a file in a directory is modified
Uses inotifywait from inotify-tools ( http://wiki.github.com/rvoicilas/inotify-tools/ ), that is compatible only with linux. Usefull when you work with files that have to be compiled.. latex, haml, c..

Obtain last stock quote from google API with xmlstarlet

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