You may not know about Knoppix, but before there was Ubuntu and before there was Mint there was a time when Knoppix was among the few distros that hardly needed introduction. Linux enthusiasts knew about Knoppix in the same way they knew about Debian.
My last tryst with Knoppix was 4-5 years ago, when it had just recently made the move from being a KDE-based distro to featuring a relatively new (at the time) desktop environment called LXDE. A couple days back I found my Editor, Swapnil, excited about Knoppix's latest 7.2 public release. He insisted I take the all new Knoppix out for a spin, and see for myself how it felt like using it after a long time. So out I went to fetch a copy.
rest here 
Also: Revisiting Knoppix