Kali Linux – Most advanced Linux distro for penetration testing and ethical hacking

Kali Linux (successor of BackTrack Linux) is a free and open-source Debian-based Linux distribution funded and maintained by Offensive Security from Switzerland. Users can boot and use this OS via hard disk, live CD or live USB anytime and anywhere. Almost all open-source tools used for digital forensics, penetration testing, ethical hacking and network security assessments are included. There is no need to prepare and maintain this Linux distribution (including gathering all those software and their dependencies) by yourself, or to install any software and save any files on Kali.