unix and the c language have changed the way people used and learned to program with computers. even though technology changes fast, certain approaches to technology often remain unchanged. unix is one of them; it has survived the test of time. enterprise managers today no longer need to justify the use of unix. thanks partly to linux, things should remain this way in the foreseeable future too.
even though this book deals with an operating system in particular, it will help you understand operating systems in general. this fourth edition was written with this objective in mind. in fact,theoretical courses on operating systems often use the unix system to illustrate key features.although we haven't seen another notable system since the advent of unix, it shouldn't surprise us if future operating systems adopt many of the key features of unix.
many people derive comfort from the "user-friendliness" offered by windows. why key in a command when one or two mouse clicks can do the job? true, but it doesn't require much effort for a unix enthusiast to prove that the mouse can't solve all problems. once you go through part i of this book, you'll discover several situations where complex jobs are handled--not by mouse clicks--but by combining tools and programming with the shell. shun the herd and join the select body of people for whom it doesn't matter whether unix is user-friendly or not. it's simply a way of life--a life they will never cease to cherish.
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