Kali Linux is a Debian derived Linux distribution designed for digital forensics and penetration testing.It is maintained and funded by Offensive Security.It was developed in 13 March 2013.Kali linux over 600 preinstalled penetration-testing programs,including Armitage,Nmap,,John the Ripper password cracker,Aircrack-ng,Burp suite and OWASP ZAP web application security scanners. It was developed by Mati Aharoni and Devon kearns of Offensive Security through the rewrite of BackTrack,their previous information security testing Linux distribution based on Knoppix,originally it was designed with a focus on kernel auditing,from which it gos its name Kernel Auditing Linux.The third core developer,Raphael Hertzog,joined them as Debian expert.Kali Linux is based on the Debian Testing branch.Most packages kali uses are imported from the Debian repositories.