What is BackTrack & How to use ?

BackTrack-Is a Linux distribution distributed as Live cd or Usb for penetration testing.BackTrack provides penetration testers a comprehensive collection of security related tools, support live cd and live usb and permanent installation also.BackTrack provides Mozilla, Pidgin, K3B, XMMS .You can create personalized distributions by including customizable scripts, additional tools and configurable kernels.
BackTrack includes many well known security tools Like NMAP, KISMET and many more.

Get more information about BackTrack 4 Click Here-
How to create live USB click here