NoteOnSudo

From RdiffBackupWiki

I followed the unattended guide but further restricted things by creating a backup user on the target (client) server and adding a sudo rule:

visudo and add this line, where backupclient represents the user account:

backupclient ALL=NOPASSWD: /usr/bin/rdiff-backup

Then instead of placing the authorized key file in root place it under the 'backupclient' account and add 'sudo' to the command:

command="sudo rdiff-backup......."