[rdiff-backup-users] Automate SSH passphrase login during rdiff-backup

[Justin Holleb]

Does rdiff-backup have some facility to specify the ssh passphrase 
automatically during a cron? Has anyone had to set it up like this? I 
realize that the solution will likely be less secure but one of the 
requirements is that the key must have a passphrase.. Willing to use 
bash or perl