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apache statistics

format txt as table

Disconnect telnet
You are stuck with testing a tcp port using telnet, and must kill the telnet session from another terminal... Or, press ctrl+5 and write close/quit to force the current connection to close..

Delete all non-printing characters from a file
tr has some predefined sets of characters that are more convenient to use than characters codes

mplayer -af scaletempo
Pitch-correct play speed with mplayer. You can also use [] and {} keys to change play speed on-the-fly.

Recall “N”th command from your BASH history without executing it.

edit hex mode in vim
return to normal mode from hex mode :%!xxd -r

processes per user counter
No need for sort

find established tcp connections without using netstat!!
Fast and easy way to find all established tcp connections without using the netstat command.

Given process ID print its environment variables
Same as previous but without fugly sed =x


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