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Matrix Style
Solves "tr" issues with non C-locales under BSD-like systems (like OS X)

Smiley Face Bash Prompt
If your last command was a dud, your bash prompt will be angry at you. Otherwise it's happy. Soon you will crave its constant approval and your linux skills will improve simply to avoid low self-esteem.

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

Convert seconds to [DD:][HH:]MM:SS
Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

analyze traffic remotely over ssh w/ wireshark
commandline for mac os x

Get line count for any file ending with extension recursively rooted at the current directory.

What is my ip?

AWK: Set Field Separator from command line

Chrome sucks
How much memory is chrome sucking?

Debug bash shell scripts.
Display commands and their arguments as they are executed. Useful for debugging shell scripts.


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