cheat sheets.

LOCAL: 
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Create key:
$ ssh-keygen -t dsa

Copy your ssh keys to clipboard:
$ cat ~/.ssh/id_rsa.pub | pbcopy  
  [rescue: skip the "| pbcopy" and just ctrl-C your key it]

REMOTE:
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Create key files (substitute in your editor):
mkdir ~/.ssh
emacs ~/.ssh/authorized_keys
  [now paste the key. save. exit.]
chmod 700 ~/.ssh
chmod 600 ~/.ssh/authorized_keys

SCP:
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[instead of the paste, you can...]
scp ~/.ssh/id_rsa.pub username@ftp.yourdomain.com:.ssh/authorized_keys