SMTP Auth for Sendmail

SSH public/private key pairs to login

Want to use ssh public/private key pairs to login instead of typing a password?

On the client:

$ ssh-keygen -t rsa

Enter passphrase (empty for no passphrase):

$ ssh server "mkdir .ssh; chmod 0700 .ssh"
$ scp .ssh/id_rsa.pub server:.ssh/authorized_keys2

Enjoy!