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use screen as a terminal emulator to connect to serial consoles
Use GNU/screen as a terminal emulator for anything serial console related. screen /dev/tty eg. screen /dev/ttyS0 9600 MacOSX: http://www.macosxhints.com/article.php?story=20061109133825654 Cheat Sheet: http://www.catonmat.net/blog/screen-terminal-emulator-cheat-sheet/

stream a youtube video with mpv where $1 is the youtube link.
opens a new session with video stream

cymru malware check

Recurse through directories easily
This is a simple case of recursing through all directories, adding the '.bak' extension to every file. Of course, the 'cp $file $file.bak' could be any code you need to apply to your recursion, including tests, other functions, creating variables, doing math, etc. Simple and clean recursion.

Stamp a text line on top of the pdf pages.
To quickly add some remark, comment, stamp text, ... on top of (each of) the pages of the input pdf file.

Zip each file in a directory individually with the original file name
This will list the files in a directory, then zip each one with the original filename individually. video1.wmv -> video1.zip video2.wmv -> video2.zip This was for zipping up large amounts of video files for upload on a Windows machine.

list files recursively by size

merge pdf using bash brace exansion
merge pdf from pg_0001.pdf until pg_0009.pdf into MyFile.pdf

RTFM function
Some commands have more information on 'info' than in the man pages

Get IPv4 of eth0 for use with scripts
I've been using it in a script to build from scratch proxy servers.


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