Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
Security professionals have been relying on the BackTrack security distribution for many years to help them perform their assessments. The industry has been waiting for the next major release of BackTrack. However, the creators of BackTrack have gone in a new direction and created Kali Linux. Kali Linux is similar to BackTrack in many ways, but it lays a new foundation and makes substantial improvements that will allow it to be even more useful to penetration testers in the coming years.
Kali Linux is a new open source distribution that facilitates penetration testing. Whereas BackTrack was built on Ubuntu, Kali is built from scratch and constructed on Debian and is FHS-compliant. Kali also has improved software repositories that are synchronized with the Debian repositories so it makes it easier to keep it updated, apply patches and add new tools. It is also easy to customize your own Kali Linux so that it contains only the packages and features that are required.