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.
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Wow, didn't really expect you to read this far down. The latest iteration of the site is in open beta. It's a gentle open beta-- not in prime-time just yet. It's being hosted over at UpGuard (link) and you are more than welcome to give it a shot. Couple things:
To quickly add some remark, comment, stamp text, ... on top of (each of) the pages of the input pdf file.
Can be used in a firewall script, e.g. to avoid logging broadcast packtes.
Instead of looking for the right ip address, just pick whatever address you like and set a static ip mapping.
There's already a proper command for what the former alternative tried to script
Update twitter from commandline, without revealing your password and without having to type it interactively.
You 'll need to put a line "machine twitter.com login TWITTERUSER password TWITTERPASS" in $HOME/.netrc and better chmod 600 that file.
you don't need to echo, just a plain redirect is enough to empty the file
Possible use, to filter something in stderr:
(/usr/bin/$COMMAND $PARAM 3>&1 1>&2 2>&3 | grep -v $uninteresting_error ) 3>&1 1>&2 2>&3
Used for moving stuff around on a fileserver