How to hack a websites using Symlink Bypassing?

Symlink Bypassing:

Symlink is a method to reference other files and folder on Linux, in order to make linux work faster.  Symlink Bypassing is a hacking technique used to gain unauthorized access to folders on a server. Using this technique an hackers are able to hack multiple sites on a shared web hosting service.

Here is Video tutorial that explain how to hack a website using Symlink Bypassing, 

Video demo is created by SilentHacker