Most of the developers probably heard about Kali Linux, One of the best platform for security analysis. But how much developers know how to operate it? How to master it? In this talk, I will introduce Linux Kali from a developer side and NOT the security research side. It means that I will show how to use Linux Kali (without any need to download and install it) to pentest you own web applications. From how to install it to learn the basic tools. After this talk, you will be able to use Linux Kali everywhere to test your applications.