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linux shell测试（159个子文件）

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xml:lang="zh-CN" xmlns="http://www.w3.org/1999/xhtml" lang="zh-CN"><head><meta content="text/html; charset=UTF-8" http-equiv="Content-Type"><title>Linux 技巧: Bash 参数和参数扩展</title> <meta http-equiv="PICS-Label" content="(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))"> <link rel="schema.DC" href="http://purl.org/DC/elements/1.0/"> <link rel="SHORTCUT ICON" href="http://www.ibm.com/favicon.ico"> <meta name="Owner" content="dw@cn.ibm.com"> <meta name="DC.Language" scheme="rfc1766" content="zh-CN"> <meta name="IBM.Country" content="CN"> <meta name="Security" content="Public">  <meta name="IBM.SpecialPurpose" content="SP001"> <meta name="IBM.PageAttributes" content="sid=1003"><meta name="Abstract" content="您是否有时想知道如何对脚本使用参数，以及如何将参数传递给内部函数或其他脚本？是否需要对参数或选项做一些简单的有效性测试？或者对参数字符串执行一些简单的析取和替换操作？本文将向您介绍参数的用法和 bash shell 中的各种参数扩展。"><meta name="Description" content="您是否有时想知道如何对脚本使用参数，以及如何将参数传递给内部函数或其他脚本？是否需要对参数或选项做一些简单的有效性测试？或者对参数字符串执行一些简单的析取和替换操作？本文将向您介绍参数的用法和 bash shell 中的各种参数扩展。"><meta name="Keywords" content="linux, tip, bash, parameter, string, functions, expansion, extraction, option, getopts, replacement, ian shields, 技巧, 参数, 字符串, 函数, 扩展, 析取, 选项, 替换, tttlca, dddauca, tttosca"><meta name="DC.Date" scheme="iso8601" content="2007-07-30"><meta name="DC.Type" scheme="IBM_ContentClassTaxonomy" content="CT316"><meta name="DC.Subject" scheme="IBM_SubjectTaxonomy" content="SWGC0"><meta name="DC.Rights" content="Copyright (c) 2007 by IBM Corporation"> <meta name="Robots" content="index,follow"><meta name="IBM.Effective" scheme="W3CDTF" content="2007-07-30"><meta name="Last update" content="02032008jincx@cn.ibm.com">  <link rel="stylesheet" type="text/css" media="screen,print" href="bash%E5%8F%82%E6%95%B0%E5%92%8C%E5%8F%82%E6%95%B0%E6%89%A9%E5%B1%95_files/table.css">  <script language="JavaScript" src="bash%E5%8F%82%E6%95%B0%E5%92%8C%E5%8F%82%E6%95%B0%E6%89%A9%E5%B1%95_files/dwcss14.js" type="text/javascript"></script><link rel="stylesheet" href="bash%E5%8F%82%E6%95%B0%E5%92%8C%E5%8F%82%E6%95%B0%E6%89%A9%E5%B1%95_files/r1v14.css" type="text/css"> <link rel="stylesheet" type="text/css" href="bash%E5%8F%82%E6%95%B0%E5%92%8C%E5%8F%82%E6%95%B0%E6%89%A9%E5%B1%95_files/main.css"> <link rel="stylesheet" type="text/css" media="all" href="bash%E5%8F%82%E6%95%B0%E5%92%8C%E5%8F%82%E6%95%B0%E6%89%A9%E5%B1%95_files/screen.css"> <link rel="stylesheet" type="text/css" media="print" href="bash%E5%8F%82%E6%95%B0%E5%92%8C%E5%8F%82%E6%95%B0%E6%89%A9%E5%B1%95_files/print.css"> <script language="JavaScript" src="bash%E5%8F%82%E6%95%B0%E5%92%8C%E5%8F%82%E6%95%B0%E6%89%A9%E5%B1%95_files/detection.js" type="text/javascript"></script> <script language="JavaScript" src="bash%E5%8F%82%E6%95%B0%E5%92%8C%E5%8F%82%E6%95%B0%E6%89%A9%E5%B1%95_files/dropdown.js" type="text/javascript"></script> <script language="JavaScript" src="bash%E5%8F%82%E6%95%B0%E5%92%8C%E5%8F%82%E6%95%B0%E6%89%A9%E5%B1%95_files/grabtitle.js" type="text/javascript"></script> <script language="JavaScript" src="bash%E5%8F%82%E6%95%B0%E5%92%8C%E5%8F%82%E6%95%B0%E6%89%A9%E5%B1%95_files/emailfriend2.js" type="text/javascript"></script><script language="javascript" src="bash%E5%8F%82%E6%95%B0%E5%92%8C%E5%8F%82%E6%95%B0%E6%89%A9%E5%B1%95_files/ajax1.js" type="text/javascript"></script><script language="javascript" src="bash%E5%8F%82%E6%95%B0%E5%92%8C%E5%8F%82%E6%95%B0%E6%89%A9%E5%B1%95_files/searchcount.js" type="text/javascript"></script><script language="JavaScript" type="text/javascript">var emailAbstract = "您是否有时想知道如何对脚本使用参数，以及如何将参数传递给内部函数或其他脚本？是否需要对参数或选项做一些简单的有效性测试？或者对参数字符串执行一些简单的析取和替换操作？本文将向您介绍参数的用法和 bash shell 中的各种参数扩展。"; 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