A Quick Introduction to Unix
by Jim Tyson, et al.
Publisher: Wikibooks 2011
Unix is an operating system designed for use on any kind of computer or computing device. It is a multi-tasking, multi-user system. Unix is also part of the underlying technology of the Internet. Many of the web servers that serve up the WWW for example run a program called Apache under Unix.
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by Arnold D. Robbins
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