Timothy Murphy wrote:

> Must an ssh server be running on BackPC clients?

If you'll be using SSH, then yes, because the BackupPC server needs to  
be able to login on the clients.

> Is there incidentally a simple test to determine
> if ssh is working as required by BackupPC?

See if the BackupPC user can login on the client without entering a  
password.

Switch to the backuppc user on the BackupPC server:
# su -s /bin/bash - backuppc

Try to login on the remote client:
# ssh username@client

You need to do this at least once after adding a new host, because you  
need to okay the SSH key fingerprints the first time.

> As far as I can see, one has to exchange keys
> between backuppc on the server and root on the clients.
> Is that correct?

The public key of the backuppc user needs to be in the authorized_keys  
file of the user account on the client. Also see 
http://backuppc.sourceforge.net/faq/ssh.html

Nils Breunese.

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