BackTrack 5 is an Ubuntu-based distribution with specialist software designed for penetration testing. This release contains over 120 bug fixes, 30 new tools and 70 tool updates. This new revision has been built from scratch, and boasts several major improvements over all our previous releases. Based on Ubuntu 10.04 LTS, Linux kernel 220.127.116.11, patched with all relevant wireless injection patches. Fully open source and GPL compliant .
BackTrack is an Ubuntu-based distribution with a collection of security and forensics tools. It was created by merging Auditor Security Linux with WHAX (formerly Whoppix).