Linux is a computer operating system which is based on free and open source software. Although many different varieties of Linux exist, all are Unix-like and based on the Linux kernel, an operating system kernel created in 1992 by Linus Torvalds. Linux can be installed on a wide variety of computer hardware, ranging from mobile phones, tablet computers, routers and video game consoles, to desktop computers, mainframes and supercomputers.
Over past 20 years, Linux has grown exponentially; check out this then-and-now style infographic to compare everything from lines of code to user base to number of top super computers running the OS.
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