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commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

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list block devices
Shows all block devices in a tree with descruptions of what they are.

List files with quotes around each filename

Random Futurama quote
Random Futurama quote from http://cubemonkey.net/quotes/. Change the quote= to change the quote source.

Know which modules are loaded on an Apache server
This let you know which modules has loaded the Apache server, very useful to know if the mod_rewrite is ready to use.

Get the number of days in a given month and year

Show all symlinks

Clean up after a poorly-formed tar file
These days, most software distributed in tar files will just contain a directory at the top level, but some tar files don't have this and can leave you with a mess of files in the current folder if you blindly execute $ tar zxvf something.tar.gz This command can help you clean up after such a mistake. However, note that this has the potential to do bad things if someone has been *really* nasty with filenames.

Print all lines in a file that are not a certain length
Alternatively, print all the lines that are a certain length: $awk 'length($0)==12 {print}' your_file_name

Stoppable sleep
A nice way to interrupt a sleep with a signal.

Get MAC address


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