cron job

cron job

30 13 * * * /home/username/run-me.sh >/dev/null 2>&1

0 * * * * curl --silent --compressed http://example.com/cron.php >/dev/null 2>&1

crontab filename  Install filename as your crontab file,
crontab -e        Edit your crontab file, or create one if it doesn’t already exist. 
crontab -l        Display your crontab file.
crontab -r        Remove your crontab file.
crontab -v        Display the last time you edited your crontab file.