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1、BashReferenceManualReferenceDocumentationforBashEdition4.1,forBashVersion4.1.December2009ChetRamey,CaseWesternReserveUniversityBrianFox,FreeSoftwareFoundationThistextisabriefdescriptionofthefeaturesthatarepresentintheBashshell(version4.1,23December2009).This
2、isEdition4.1,lastupdated23December2009,ofTheGNUBashReferenceManual,forBash,Version4.1.Copyrightc1988–2009FreeSoftwareFoundation,Inc.Permissionisgrantedtomakeanddistributeverbatimcopiesofthismanualprovidedthecopyrightnoticeandthispermissionnoticearepreservedo
3、nallcopies.Permissionisgrantedtocopy,distributeand/ormodifythisdocumentunderthetermsoftheGNUFreeDocumentationLicense,Version1.3oranylaterversionpublishedbytheFreeSoftwareFoundation;withnoInvariantSections,withtheFront-Covertextsbeing“AGNUManual”,andwiththeBa
4、ck-CoverTextsasin(a)below.Acopyofthelicenseisincludedinthesectionentitled“GNUFreeDocumentationLicense”.(a)TheFSF’sBack-CoverTextis:YouarefreetocopyandmodifythisGNUmanual.BuyingcopiesfromGNUPresssupportstheFSFindevelopingGNUandpromotingsoftwarefreedom.”Publis
5、hedbytheFreeSoftwareFoundation59TemplePlace,Suite330,Boston,MA02111-1307USAiTableofContents1Introduction:::::::::::::::::::::::::::::::::::::11.1WhatisBash?:::::::::::::::::::::::::::::::::::::::::::::::::11.2Whatisashell?::::::::::::::::::::::::::::::::::::
6、::::::::::::12Definitions:::::::::::::::::::::::::::::::::::::::33BasicShellFeatures::::::::::::::::::::::::::::53.1ShellSyntax:::::::::::::::::::::::::::::::::::::::::::::::::::53.1.1ShellOperation:::::::::::::::::::::::::::::::::::::::::::53.1.2Quoting::::
7、:::::::::::::::::::::::::::::::::::::::::::::::63.1.2.1EscapeCharacter:::::::::::::::::::::::::::::::::::::63.1.2.2SingleQuotes::::::::::::::::::::::::::::::::::::::::63.1.2.3DoubleQuotes:::::::::::::::::::::::::::::::::::::::63.1.2.4ANSI-CQuoting:::::::::::
8、::::::::::::::::::::::::::63.1.2.5Locale-SpecificTranslation::::::::::::::::::::::::::::73.1.3Comments::::::::::::::::::::::::::::::::::::::::::::::::73.2ShellCommands:::::::::::::::::::::::::::
