{
    return "# rdiff-backup disabled" 
        unless ${'rdiff-backup'}{status} eq 'enabled';

    my $hour   = ${'rdiff-backup'}{Hour}   || 1;
    my $minute = ${'rdiff-backup'}{Minute} || 5;

    return "$minute $hour * * * root /sbin/e-smith/do_rdiff-backup";
}
