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Rename duplicates from MusicBrainz Picard
Renames duplicates from MusicBrainz Picard, so you get the latest copy and not a bunch of duplicates.

list files recursively by size

Search some text from all files inside a directory

Compare a remote file with a local file

slow down CPU and IO for process and its offsprings.

Copy files for backup storage
Backup a whole directory copying only updated files.

Command to logout all the users in one command
Logs all users out except root. I changed the grep to use a regexp in case a user's username contained the word root.

Geolocate a given IP address

Show apps that use internet connection at the moment.
show only the name of the apps that are using internet

Display command lines visible on commandlinefu.com homepage
Uses the fabulous Hpricot library to parse HTML from Ruby. Extracts all elements of "command' class and displays unescaped text from inside these elements. The following command can help install dependencies (apart from Ruby itself) $ gem sources -a http://gems.github.com && sudo gem install why-hpricot


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