Hi,
I use it to transfer my passwd from my central host to others hosts.
The way I found to do that was making a key without passphrase, just
enter,
and copying my public key to the /root/.ssh/authorized_keys of the
target
hosts. People on the list will tell to not do it, instead use ssh-agent,
and use a passphrase to encrypt the keys, but if you do that you will
have to put your passphrase into the script, so I think it will be the
same of not using it.
If I'm wrong, I would like to hear another opinion.
Regards,
Carlos