to prepare a cronjob command to grab the feeds sources automatically :
enter the (Add New Cron Job) from your site CPanel
choose the common setting according to your server specifications. (we recommend to choose twice a day).
in the command input put
php -q /home/YOUR-ACCOUNT/PATH-TO-CRON-FILE/cron.php
substitute YOUR-ACCOUNT by yours; most times this value is like the domain name e.g: codecanyon, pluscss without www or .com etc.
substitute PATH-TO-CRON-FILE by the path that you have installed the script in relating to your web root.
e.g : public_html/rss_aggregator_script/
the command will be :
php -q /home/pluscss/public_html/rss_aggregator/cron.php
you can change the cron.php filename to the name you want in order to keep it secure.