MacClient:~ UserA$ ssh-keygen -t rsa

MacClient:~ UserA$ ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/Users/UserA/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /Users/UserA/.ssh/id_rsa.
Your public key has been saved in /Users/UserA/.ssh/id_rsa.pub.
The key fingerprint is:
a4:74:0b:bc:2f:d1:f5:c7:4e:90:51:7f:f4:45:84:a0 UserA@MacClient

MacClient:~ UserA$ ssh UserA@UbuntuServer mkdir -p .ssh

MacClient:~ UserA$ ssh UserA@UbuntuServer mkdir -p .ssh
UserA@vmtuserver's password:

MacClient:~ UserA$ cat .ssh/id_rsa | ssh UserA@UbuntuServer 'cat >> .ssh/authorized_keys'

MacClient:~ UserA$ cat .ssh/id_rsa | ssh UserA@UbuntuServer 'cat >> .ssh/authorized_keys'
UserA@vmtuserver's password:

MacClient:~ UserA$ ssh UserA@UbuntuServer

MacClient:~ UserA$ ssh UserA@UbuntuServer
Linux UbuntuServer 2.6.24-19-server #1 SMP Wed Jun 18 15:18:00 UTC 2008 i686
 
The programs included with the Ubuntu system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.
 
Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.
 
To access official Ubuntu documentation, please visit:
http://help.ubuntu.com/
You have mail.
Last login: Tue Jan 13 00:14:19 2009 from MacClient
UserA@UbuntuServer:~$