Live CD
The first Linux-based Live CD was Yggdrasil Linux (it stopped being made in 1995), but it did not work well because back then CD drives could not read CDs fast enough. in 2003, a Live CD based on Debian called Knoppix was released. Many people liked to use Knoppix, both as an operating system, and as a way of fixing a computer. Many more people have started using Live CDs since then, because of programs like Linux Live scripts and remastersys which make it very easy to make your own personalized Live CD.