"GnackTracksh is a Live (and installable) Linux distribution designed for Penetration Testing and is based on Ubuntu. Although this sounds like BackTrack, it's most certainly not; it's very similar but based on the much loved GNOME!"
The Hacker News

This release does NOT contain Nessus pre-installed as the authors were asked to remove it by Tenable Security Inc. It still can be manually installed. Many of the tools have been updated and GnackTrack now runs with the 2.6.35 kernel. So there should be much more support for your wireless cards.
Download GnackTrack R2 here.
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