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PulseAudio: set the volume via command line
If you have more than one SINK

Get IP address from domain
shorter (thus better ;-)

Generate random valid mac addresses
Ruby version. Also, a perl version: $perl -e 'printf("%.2x.",rand(255))for(1..5);printf("%.2x\n",rand(255))'

get delicious bookmarks on your shell (text version :-))
a variation of avi4now's command - thanks by the way!

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

List your installed Chromium extensions (with url to each page)
Gives you a list for all installed chrome (chromium) extensions with URL to the page of the extension. With this you can easy add a new Bookmark folder called "extensions" add every URL to that folder, so it will be synced and you can access the names from every computer you are logged in. ------------------------------------------------------------------------------------------------------------------ Only tested with chromium, for chrome you maybe have to change the find $PATH.

Simple XML tag extract with sed
Limited, but useful construct to extract text embedded in XML tags. This will only work if bar is all on one line. If nobody posts an alternative for the multiline sed version, I'll figure it out later...

Rename all images in current directory to filename based on year, month, day and time based on exif information

Copy ssh keys to user@host to enable password-less ssh logins.
To generate the keys use the command ssh-keygen

Install pip with Proxy
Installs pip packages defining a proxy


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