Contents of .ssh/config,
# Host myshortname realname.example.com # Hostname realname.example.com # IdentityFile ~/.ssh/realname_rsa # private key for realname Host earth Hostname www.earth.com IdentityFile ~/.ssh/bhitch_rsa_www.krypton.com
Make sure when connecting to specify your id if it is the not the same id as your client Unix account.