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shell-book

Shell脚本学习

Shell是一种脚本语言，那么，就必须有解释器来执行这些脚本。

Unix/Linux上常见的Shell脚本解释器有bash、sh、csh、ksh等，习惯上把它们称作一种Shell。我们常说有多少种Shell，其实说的是Shell脚本解释器。

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shell-book's Issues

错误：查找字符串一节

echo expr index "$str" love #最后一个参数是字符，字符串只保留首字母
此表达式不是只保留首字母，而是会对后面字符串每一个单独查找，返回最靠前的index。可能是l正好时最靠前的，所以没有在意。换成这个就好识别一点
echo expr index "hello world" worl #3

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