bak is a simple command line utility to save snapshots of a file
to a backup directory. Typically, it is used in connection with
mop.pl
which cleans up afterwards and deletes all but daily, weekly and monthly
snapshots. See the article on
Copyright 2004 by Mike Schilli, all rights reserved.
This program is free software, you can redistribute it and/or
modify it under the same terms as Perl itself.