Hacking Wireless Access Point (WPA2) with Knoppix 5.0

Hi all,

Can you please teach me how to hack the WPA2 key of Wireless Access Point, using Knoppix 5.0 live CD. Is it possible?
How?

I want to learn for security reason not for anything bad.

Thanks!

This is not a warez or hacking site, such discussions would be off topic.