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Show a prettified list of nearby wireless APs

Using numsum to sum a column of numbers.
if you, like me, do not have the numsum, this way can do the same.

ignore hidden directory in bash completion (e.g. .svn)

Most used command

Check whether laptop is running on battery or cable
1 = on ac, 0 = on bat

Replace duplicate files by hardlinks

Randomly run command
Randomly decide whether to run a command, or fail. It's useful for testing purposes. . Usage: ran PERCENTAGE COMMAND [ARGS] Note: In this version the percentage is required. . This is like @sesom42 and @snipertyler's commands but in a USABLE form. . e.g. In your complicated shell script, put "ran 99" before a crucial component. Now, it will fail 1% of the time allowing you to test the failure code-path. $ ran 99 my_complex_program arg1 arg2

a function to find the fastest free DNS server
Uses GNU Parallel.

Change user within ssh session retaining the current MIT cookie for X-forwarding
When you remotely log in like "ssh -X userA:host" and become a different user with "su UserB", X-forwarding will not work anymore since /home/UserB/.Xauthority does not exist. This will use UserA's information stored in .Xauthority for UserB to enable X-forwarding. Watch http://prefetch.net/blog/index.php/2008/04/05/respect-my-xauthority/ for details.

My random music player
This is my favorite music player I use in my beloved Linux systems,server or desktop Enjoy :-)


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