Perl

Schedule Perl scripts with crontab:

https://www.perl.com/article/43/2013/10/11/How-to-schedule-Perl-scripts-using-cron/

If using a text file to load the crontab, BE SURE to use UNIX-style line endings.

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Load modules in same directory:

use File::Basename;
use lib dirname (__FILE__);
use LibreUtils;

or relative directory:

use File::Basename;
use lib dirname (__FILE__) . "/MyModules";