$ ssh-keygen
Generating public/private rsa key pair.
Enter fileinwhich to save the key (/Users/schacon/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in/Users/schacon/.ssh/id_rsa.
Your public key has been saved in/Users/schacon/.ssh/id_rsa.pub.
The key fingerprint is: 43:c