What is Linux ?

A free and open source operating system. The main component of Linux is the Linux kernel, an operating system kernel first released October 5, 1991 by Linus Torvalds.

Today Linux runs supercomputers, cellphones, laptops, tablets, webcams, music systems, gaming consoles, GPS, automations, robotics, space shuttles and almost any thing which has
a processor 200 MHz or above.