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IFS - use entire lines in your for cycles
When you use a "for" construct, it cycles on every word. If you want to cycle on a line-by-line basis (and, well, you can't use xargs -n1 :D), you can set the IFS variable to .

Watch Aljazeera live

send tweets to twitter (and get user details)
great for outputting tweets from cron jobs and batch scripts

5 Which Aliases
5 helpful aliases for using the which utility, specifically for the GNU which (2.16 tested) that is included in coreutils. Which is run first for a command. Same as type builtin minus verbosity $ alias which='{ command alias; command declare -f; } | command which --read-functions --read-alias' Which (a)lias $ alias whicha='command alias | command which --read-alias' Which (f)unction $ alias whichf='command declare -f | command which --read-functions' Which e(x)ecutable file in PATH $ alias whichx='command which' Which (all) alias, function, builtin, and files in PATH $ alias whichall='{ command alias; command declare -f; } | command which --read-functions --read-alias -a' # From my .bash_profile http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html

List the size of all sub folders and files from the current location, with sorting

Convert text to uppercase
Usage: upper [STRING]...

Detect encoding of a text file
This command gives you the charset of a text file, which would be handy if you have no idea of the encoding.

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

Find the package that installed a command

Sort netflow packet capture
Sort netflow packet capture by unique connections excluding source port.


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