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内容紹介 Tap the Productivity and Power of the UNIX Shell… UNIX® Shell Programming Third Edition The Shell is the key to productivity and quality in the UNIX environment. And this new edition puts you in control of all Shell capabilities with completely updated tutorial and expanded quickreference materials. One of the most respected and popular UNIX Shell guides—the only one to cover all three Shells: Bourne， C， and Korn—it helps you…Use the power of the Shell to increase your productivity by automating mundane and complex tasks with your own prototypes and applications—without purchasing expensive database packages or other softwareDevelop Bourne， C， or Korn Shell mastery step-by-step， whether you’re a beginner or a seasoned user， by following a clear and well-designed tutorial path supported by numerous well-chosen examplesGet more from UNIX by stepping behind the facade of the Graphical User Interface (GUI) to increase your efficiency and effectivenessUnderstand the linkages between the Shell and X Windows—and even such high-level topics as how to create your own commands using lexPrototype tools and applications easily and quickly in ShellCreate sophisticated applications by composing them with the ShellUNIX system users， administrators， and programmers: tap the power of the UNIX Shell today， and see your productivity and the quality of your programming take off with this unique UNIX resource.