Kali Linux is a Debian-derived Linux distribution designed for digital forensics and penetration testing. It contains over 600 pre-installed penetration testing programs and is completely customizable with multilingual support. Kali Linux is focused on tools for network security assessments, penetration testing, and vulnerability assessments through programs like Nmap, Aircrack-ng, Nessus, and THC Hydra. The distribution is optimized for penetration testing and digital forensics and aims to provide industry standard tools for assessing network security.