Previewing your site is simple. Please view below the link that you will need to use, please copy / paste it with the updated values into your web browser.
http://your-server-ip-here/~cPanel-username-here
* Please note, that if you are using applications such as WordPress, they will not display correctly, as they require the DNS to be pointed to the hosting account before all the images will resolve.
If you are using a Windows hosting it will be http://ipaddress/$sitepreview/domain.com/