So we will follow these 3 screen shots. Easy !
1. Login to your Cpanel and search for 'cron'

2. Select common settings, for me I did once a day.(Execute that url once a day in 24 hours).
3. And in this step I have added commmand (wget -q -O /dev/null "https://yourwebsite.com/index.php?option=com_bt_property&task=property.up_expired" > /dev/null 2>&1) to execute a controller task of my custom component.

And this will start executing, that specific url once a day. Now you can perform any action inside your custom component controller file.
Quiet Easy !
Hope this helped.
Still need help! no problem, feel free to contact us Today