Setting Up Magento In Cron
Login to cPanel for your domain, and click on the Cron jobs icon.
Click on the Standard button.
For the Command to run, enter the path to the cron.php script, which is located in the directory where Magento is installed.
For example, if Magento is installed in the root web directory, you would enter the following:
php5-cli -f /home/USERNAME/public_html/cron.php
Replace USERNAME with the appropriate value.
Click on the Save crontab button (there’s no need to adjust the frequency at which this runs).
Now the cron.php script will run every day at 3 AM.