If my "backend" you mean to have some sort of command line tool to create backups, thi is already possible using the BackupEngine.py hubackup backend. Browse the source or so, and see how it's possible to invoke it from the command line.
-- [Feature] Backend system for backups https://launchpad.net/bugs/72833 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
