Linux — Unix
Linux is an operating system – very much like UNIX — that has become very popular over the last several years.
The first version of UNIX was originally developed several decades ago and was used primarily as a research operating system in universities. High-powered desktop workstations from companies like Sun proliferated in the 1980s, and they were all based on UNIX. A number of companies entered the workstation field to compete against Sun: HP, IBM, Silicon Graphics, Apollo, etc. Unfortunately, each one had its own version of UNIX. The proprietary operating systems owned by separate companies and the lack of a central authority in the UNIX world weakened UNIX. Linux stepped into this odd landscape and captured a lot of attention.
The Linux kernel, created by Linus Torvalds, was made available to the world for free. Torvalds then invited others to add to the kernel provided that they keep their contributions free. Thousands of programmers began working to enhance Linux, and the operating system grew rapidly. Because it is free and runs on PC platforms, it gained a sizeable audience among hard-core developers very quickly. Linux has a dedicated following and appeals to several different kinds of people:
- People who already know UNIX and want to run it on PC-type hardware
- People who want to experiment with operating system principles
- People who need or want a great deal of control over their operating system
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