@reboot /path/to/perl /path/to/bbtester start > /tmp/cron_bbtester.log 2>&1

##</code><code>##

package Module;

use warnings;
use strict;

use Exporter;
our @ISA = qw(Exporter);

our @EXPORT_OK = qw(flail_around);

sub flail_around {
    print "Flailing like a dying chicken!\n";
}

##</code><code>##

use warnings;
use strict;

use FindBin qw($RealBin);
use lib $RealBin;

use Module qw(flail_around);

flail_around();

##</code><code>##

spek@scelia ~/scratch/demo $ perl script.pl
Flailing like a dying chicken!

##</code><code>##

spek@scelia ~ $ perl scratch/demo/script.pl
Flailing like a dying chicken!