Commands by liupeng (7)

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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"

add the result of a command into vi
in command mode, navigate your cursor to the line where you want the command output to appear, and hit "!!". No need to enter edit mode or even type a ":" (colon).

Find usb device in realtime
Using this command you can track a moment when usb device was attached.

Find broken symlinks in the current directory and its subdirectories.
This is best run as root to avoid permission denials that can produce false positives. Obviously you can specify a directory in the usual way: $ find -L dirname -type l I can't remember where I read about this or who deserves the credit for it. The find(1) manual page hints strongly toward it, however.

SSH Auto-login with password
You need to install "sshpass" for this to work. apt-get install sshpass

resize all JPG images in folder and create new images (w/o overwriting)
Convert all jpegs in the current directory into ~1024*768 pixels and ~ 150 KBytes jpegs

List bash functions defined in .bash_profile or .bashrc

Clean your broken terminal
If something fracks up your terminal, just type in 'reset' and everything should be good again.

Scan Network for Rogue APs.
I've used this scan to sucessfully find many rogue APs on a very, very large network.

Timer with sound alarm
I'd prefer this one, you have to install espeak to get this running


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