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:
similar to the previous command, but with more friendly output (tested on linux)
Shows a tree view of parent to child processes in the output of ps (linux). Similar output can be achieved with pstree (also linux) or ptree (Solaris).
Or "tail -r" on Solaris.
the newest rpms are at the top; individual packages can also be queried this way:
rpm --last -q package
Uses lsof to list open network connections (file descriptors), grepping for only those in an established state
remotely connects to an https site, fetches the ssl certificate and displays the valid dates for the cert
bash/ksh subshell redirection (as file descriptors) used as input to diff