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数组In the last chapter, we looked at how the shell can manipulate strings and numbers.The data types we have looked at so far are known... 阅读全文
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奇珍异宝In this, the final chapter of our journey, we will look at some odds and ends.While we have certainly covered a lot of ground in t... 阅读全文
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字符串和数字Computer programs are all about working with data. In past chapters, we have focused onprocessing data at the file level. Howeve... 阅读全文
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流程控制：for 循环In this final chapter on flow control, we will look at another of the shell’s looping constructs.The for loop differs from ... 阅读全文
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位置参数One feature that has been missing from our programs is the ability to accept and processcommand line options and arguments. In thi... 阅读全文
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流程控制：case 分支In this chapter, we will continue to look at flow control. In Chapter 28, we constructedsome simple menus and built the lo... 阅读全文
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疑难排解As our scripts become more complex, it’s time to take a look at what happens whenthings go wrong and they don’t do what we want. I... 阅读全文
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流程控制：while/until 循环In the previous chapter, we developed a menu-driven program to produce various kindsof system information. The prog... 阅读全文