KNOPPIX has been around the block. Yes sir, KNOPPIX is the old master of pentesting distributions so lets show some respect.
Knoppix was started by Mr Knopper. Seems like be named it after himself. Obviously.
Mr Knopper is a folk-hero legend in the pentesting Linux world because his was the first to gain popularity. His Live Distro was very popular and it still enjoys loyal support from a very educated community. When starting a program, it is loaded from the removable medium and decompressed into a RAM drive. The decompression is transparent and on-the-fly. Although Knoppix is primarily designed to be used as a Live CD, it can also be installed on a hard disk like a typical operating system. Computers that support booting from USB devices can load Knoppix from a live USB flash drive or memory card.
There are two main editions of Knoppix: the traditional Compact Disc (700 megabytes) edition and the DVD (4.7 gigabytes) “Maxi” edition. Each of these main editions have two language-specific editions: English and German.
Knoppix mostly consists of free and open source software, but also includes some proprietary software, so long as it fulfils certain conditions.