Commands by rozcietrzewiacz (1)

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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"

Show the 20 most CPU/Memory hungry processes
This command will show the 20 processes using the most CPU time (hungriest at the bottom). You can see the 20 most memory intensive processes (hungriest at the bottom) by running: $ ps aux | sort +3n | tail -20 Or, run both: $ echo "CPU:" && ps aux | sort +2n | tail -20 && echo "Memory:" && ps aux | sort +3n | tail -20

save your current environment as a bunch of defaults

Query Wikipedia via console over DNS

list block devices
Shows all block devices in a tree with descruptions of what they are.

awk change field separator
GNU Awk 3.1.4

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

Deal with dot files safely

for all flv files in a dir, grab the first frame and make a jpg.
This is handy for making screenshots of all your videos for referring to in your flv player.

total text files in current dir


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