Set Schedule Task by Edit Crontab

How to perform some command or appliaction to run on schedule in Fedora?

1. Determine which user account like to perform the task.
2. Used this command "crontab -u USERNAME -e"
3. Insert those command you would like to run on schedule into crontab.
4. Example: 0 * * * * /usr/sbin/faxqclean, which means set it to clean the fax queue hourly (Hylafax Command).
5. Used "crontab -l" to check what command/application was stored in crontab.