Commands by o0110o (19)

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Emptying a text file in one shot
% = buffer d = delete

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"

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

Display a block of text with AWK

Calculate N!

Show this month's calendar, with today's date highlighted
Explanation: * The date command evaluated to today's date with blank padded on the left if single digit * The grep command search and highlight today's date * The --before-context and --after-context flags displays up to 6 lines before and after the line containing today's date; thus completes the calendar. I have tested this command on Mac OS X Leopard and Xubuntu 8.10

Go up multiple levels of directories quickly and easily.

view hex mode in vim

Find last reboot time
Specific to OSX.

Get the time since epoch
Get the time since epoch. Useful when working with commands and logs which use this format.


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