Simplify the following text for a Grade 10 native English-speaking person.
Original: Knoppix , or KNOPPIX , is an operating system based on Debian designed to be run directly from a CD \/ DVD ( Live CD ) or a USB key ( Live USB ) , one of the first of its kind for any operating system .
Simplified: Knoppix , or KNOPPIX , is a Linux distribution based on Debian designed to be started directly from a CD \/ DVD .