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,…):
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This is the best way to fix this issue on OS X. If you don't have homebrew installed, now is the perfect time to fix that too. ;-)
Works for multiple hosts (such as www.google.com) and/or wrong hosts.
Quick shortcut if you know the hostname and want to save yourself one step for looking up the IP address separately.
Some servers don't have ssh-copy-id, this works in those cases.
It will ask for the destination server, this can be IP, hostname, or user@hostname if different from current user.
Ssh keygen will let you know if a pubkey already exists on your system and you can opt to not overwrite it.