Cron Jobs With Ubuntu
With Ubuntu, you have a couple ways to setup cron jobs. You can run the 'crontab -e' from the command line or, you can edit the /etc/crontab file. The /etc/crontab file will run no matter which user is logged into the system. If you are a single user, keeping everything in this file is a valid option.
Making Cron Job
root# cd /etc root# vi crontab or username# crontab -e
Sample Cron Job That Runs Every 5 Minutes
*/5 * * * * username /usr/bin/php -f /var/www/myhtml/filename.php