commandlinefu.com is the place to record those command-line gems that you return to again and again.
Delete that bloated snippets file you've been using and share your personal repository with the world. 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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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,…):
Subscribe to the feed for:
Choose random file from current folder. Avoids using ls.
If you can install rpl it's simpler to use and faster than combinations of find, grep and sed.
See man rpl for various options.
time on above operation: real 0m0.862s, user 0m0.548s, sys 0m0.180s
using find + sed: real 0m3.546s, user 0m1.752s, sys 0m1.580s
If your script needs to be run in a terminal, this line at the top will stop it running if you absent-mindedly double-click the icon, perhaps intending to edit it. (Of course this won't help with scripts that run in the background.)
Replace "-nt" with "-ot" for oldest.
shopt -s dotglob
first to include dotfiles.
The empty file /forcefsck causes the file system check fsck to be run next time you boot up, after which it will be removed.
This works too: