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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"

check open ports without netstat or lsof

Query Wikipedia via console over DNS

Explanation of system and MySQL error codes
perror should be installed if mysql-server package is installed

Job Control
You're running a script, command, whatever.. You don't expect it to take long, now 5pm has rolled around and you're ready to go home... Wait, it's still running... You forgot to nohup it before running it... Suspend it, send it to the background, then disown it... The ouput wont go anywhere, but at least the command will still run...

Equivalent to ifconfig -a in HPUX
Command is properly working on HP-UX 11.31

Install pip with Proxy
Installs pip packages defining a proxy

add a ip address to a network device
Allows to add more than one ip address to one network device.

Display ncurses based network monitor
Nload is part of nload package, tested under Debian. Nload display network bandwidth statistics, -u m options stands for MBit unit measure.

Show the key code for keyboard events include the Fn keys
The keycodes are a result of pressing: Mute (Fn+F1) a


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