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Mastering Unix Shell Scripting: Bash, Bourne, and Korn Shell Scripting for Programmers, System Administrators, and UNIX Gurus, Second Edition PDF

1034 Pages·2008·4.16 MB·English
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Preview Mastering Unix Shell Scripting: Bash, Bourne, and Korn Shell Scripting for Programmers, System Administrators, and UNIX Gurus, Second Edition

Michael ffirs.tex V2-03/24/2008 4:19pm Pageiii Mastering UNIX®Shell Scripting Bash, Bourne, and Korn Shell Scripting for Programmers, System Administrators, and UNIX Gurus Second Edition Randal K. Michael Wiley Publishing, Inc. Michael ffirs.tex V2-03/24/2008 4:19pm Pageii Michael ffirs.tex V2-03/24/2008 4:19pm Pagei > ® m Mastering UNIX Shell o c k. o o Scripting b e w o w w. w Second Edition w < k o o B e w! o W m o d fr a o nl w o D Michael ffirs.tex V2-03/24/2008 4:19pm Pageii Michael ffirs.tex V2-03/24/2008 4:19pm Pageiii Mastering UNIX®Shell Scripting Bash, Bourne, and Korn Shell Scripting for Programmers, System Administrators, and UNIX Gurus Second Edition Randal K. Michael Wiley Publishing, Inc. Michael ffirs.tex V2-03/24/2008 4:19pm Pageiv ® MasteringUNIX ShellScripting:Bash,Bourne,andKornShellScriptingfor Programmers,SystemAdministrators,andUNIXGurus,SecondEdition Publishedby WileyPublishing,Inc. 10475CrosspointBoulevard Indianapolis,IN46256 www.wiley.com Copyright©2008byRandalK.Michael PublishedbyWileyPublishing,Inc.,Indianapolis,Indiana PublishedsimultaneouslyinCanada ISBN:978-0-470-18301-4 ManufacturedintheUnitedStatesofAmerica 10987654321 Nopartofthispublicationmaybereproduced,storedinaretrievalsystemortransmitted inanyformorbyanymeans,electronic,mechanical,photocopying,recording,scanningor otherwise,exceptaspermittedunderSections107or108ofthe1976UnitedStates CopyrightAct,withouteitherthepriorwrittenpermissionofthePublisher,or authorizationthroughpaymentoftheappropriateper-copyfeetotheCopyright ClearanceCenter,222RosewoodDrive,Danvers,MA01923,(978)750-8400,fax(978) 646-8600.RequeststothePublisherforpermissionshouldbeaddressedtotheLegal Department,WileyPublishing,Inc.,10475CrosspointBlvd.,Indianapolis,IN46256,(317) 572-3447,fax(317)572-4355,oronlineathttp://www.wiley.com/go/permissions. LimitofLiability/DisclaimerofWarranty:Thepublisherandtheauthormakeno representationsorwarrantieswithrespecttotheaccuracyorcompletenessofthecontents ofthisworkandspecificallydisclaimallwarranties,includingwithoutlimitation warrantiesoffitnessforaparticularpurpose.Nowarrantymaybecreatedorextendedby salesorpromotionalmaterials.Theadviceandstrategiescontainedhereinmaynotbe suitableforeverysituation.Thisworkissoldwiththeunderstandingthatthepublisheris notengagedinrenderinglegal,accounting,orotherprofessionalservices.Ifprofessional assistanceisrequired,theservicesofacompetentprofessionalpersonshouldbesought. Neitherthepublishernortheauthorshallbeliablefordamagesarisingherefrom.Thefact thatanorganizationorWebsiteisreferredtointhisworkasacitationand/orapotential sourceoffurtherinformationdoesnotmeanthattheauthororthepublisherendorsesthe informationtheorganizationorWebsitemayprovideorrecommendationsitmaymake. Further,readersshouldbeawarethatInternetWebsiteslistedinthisworkmayhave changedordisappearedbetweenwhenthisworkwaswrittenandwhenitisread. Forgeneralinformationonourotherproductsandservicesortoobtaintechnicalsupport, pleasecontactourCustomerCareDepartmentwithintheU.S.at(800)762-2974,outside theU.S.at(317)572-3993orfax(317)572-4002. LibraryofCongressCataloging-in-PublicationDataisavailablefrompublisher. Trademarks:Wiley,theWileylogo,andrelatedtradedressaretrademarksorregistered trademarksofJohnWiley&Sons,Inc.and/oritsaffiliates,intheUnitedStatesandother countries,andmaynotbeusedwithoutwrittenpermission.UNIXisaregistered trademarkofTheOpenGroup.Allothertrademarksarethepropertyoftheirrespective owners.WileyPublishing,Inc.,isnotassociatedwithanyproductorvendormentionedin thisbook. Wileyalsopublishesitsbooksinavarietyofelectronicformats.Somecontentthatappears inprintmaynotbeavailableinelectronicbooks. Michael ffirs.tex V2-03/24/2008 4:19pm Pagev This book is dedicated to my wife Robin, the girls, Andrea and Ana, and the grandchildren, Gavin, Jocelyn, and Julia — my true inspiration. Michael ffirs.tex V2-03/24/2008 4:19pm Pagevi Michael fabout.tex V1-03/24/2008 4:34pm Pagevii About the Author RandalK.MichaelisaUNIXSystemsAdministratorworkingasacontractconsultant. HeteachesUNIXshellscriptingincorporatesettings,wherehewritesshellscriptsto addressavarietyofcomplexproblemsandtasks,rangingfrommonitoringsystemsto replicating large databases. He has more than 30 years of experience in the industry and15yearsofexperienceasaUNIXSystemsAdministrator,workingonAIX,HP-UX, Linux,OpenBSD,andSolaris. vii Michael fabout.tex V1-03/24/2008 4:34pm Pageviii

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