php /home/youruser/public_html/forum/interface/task.php adff428c04161dd6e9866e3284740c50
It is here ACP > System > System Scheduler > Use Cron tab near top
You will need to setup the cronjob in the cpanel clicking the cron icon.
You need to click the gear to the right of the sitemap generator task under system scheduler to get the len you need to add in the task.
You need to add php before the command shown by the gear something like thisCode:php /home/youruser/public_html/forum/interface/task.php adff428c04161dd6e9866e3284740c50