BackupPC With SSH Authentication
Switch to backuppc:
su backuppc -s /bin/bash
Next create yourself a key:
No passphrase. Your end goal remember is to enable backuppc to ssh to your servers as root, with no password.
You can save yourself some trouble by disabling host key checking and password auth:
echo " StrictHostKeyChecking no PasswordAuthentication no UserKnownHostsFile /dev/null " >> ~/.ssh/config
I suppose it is a tad insecure, but is sure saves a lot of trouble.