commandlinefu.com is the place to record those command-line gems that you return to again and again.
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Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.
Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):
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I wanted to play a song from the shell and get the shell back, I also dont want to store the file if it is not needed.
edit, not sure if I need to mention it... killall vlc to stop it
This is the best way I have found to search out an application when I am not sure the title.
Grep is just to remove anything that does not contain the term in the title or short description (lots of things might include the search term in the description, such as libraries used by the application)