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Join lines and separate with spaces
Read vmargs.txt, which is a text file that could either be DOS-style (\r\n) or UNIX-style (\n) line endings and join the lines with a space separator. Can this be shortened/made more elegant?

ps -ef | grep PROCESS | grep -v grep | awk '{print $2}' | xargs kill -9
kills all pids matching the search term of "PROCESS". Be careful what you wish for :)

Changes a User Password via command line without promt
Used to change a password via a winscp faux shell

Remove specific versions of old kernels (Ubuntu/Debian)
If, for example, you want to remove all kernels and headers but the last three versions, you can't use one of that magic all-in-one "remove old stuff" commands. With this simple but elegant command you can remove a range of versions, or a list of versions with e.g. {14,16,20}.

Search some text from all files inside a directory

Printing multiple years with Unix cal command
src: http://tinyapps.org/weblog/nix/200907090700_linux_cal_print_multiple_years.html

list files recursively by size

Show device drivers and their properties (Windows XP)
Show device drivers and their properties, including digital signatures /si and in table format /fo.

make 100 directories with leading zero, 001...100, using bash3.X

Show every subdirectory (zsh)


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