Short version: [user@machineA ~]$ ssh-add Enter passphrase for /home/user/.ssh/id_dsa: Identity added: /home/user/.ssh/id_dsa (/home/user/.ssh/id_dsa) [user@machineA ~]$ ssh -A user@machineB Last login: Wed Sep 31 25:74:52 2008 from 127.0.0.1 [user@machineB ~]$ scp /tmp/CentOS.iso user@machineC:/tmp
;-)