What is Linux

What is Linux?

Linux, also known as GNU/Linux, is a free, UNIX-like operating system, developed originally for home PCs, but which now runs on practically every hardware platform available including PowerPC, Macintosh, DEC Alpha, Sun Sparc, ARM, Mainframes, and many others. Linux aims for POSIX compliancy to maintain maximum compatibility with other UNIX-like systems. With millions of users worldwide, Linux is probably the most popular UNIX-like OS in the world.