最新rhce6.0-ch05 The Boot Process

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1、CertPrs8/RHCERedHatCertifiedEngineerLinuxStudyGuide(ExamN0-201)/Jang/176565-7/Chapter1/BlindFolioPB5TheBootProcessCERTIFICATIONOBJECTIVES5.01TheBIOSandtheUEFI5.05NetworkConfiguration5.02BootloadersandGRUB5.06TimeSynchronization5.03BetweenGRUBandLogin✓Two-MinuteDrill5.04

2、ControlbyRunlevelQ&ASelfTestCopyright©2011byTheMcGraw-HillCompanies05-ch05.indd14/13/20117:18:07AMCertPrs8/RHCERedHatCertifiedEngineerLinuxStudyGuide(ExamN0-201)/Jang/176565-7/Chapter12Chapter5:TheBootProcesshischapterisfocusedonwhathappensfromthemomentasystemispoweredu

3、ptothetimealoginpromptisavailable.Thosearethefundamentalsofthebootprocess.TWhenRHEL6isproperlyinstalled,theBIOS/UEFIpointstotheaspecificmediadevice.Assumingitsalocalharddrive,themasterbootrecord(MBR)ofthatdevicepointstotheGRUBbootloader.OnceanoptiontobootRHEL6isselecte

4、dinGRUB,theassociatedcommandspointtoandinitializestheLinuxkernel.whichthenstartsinit,thefirstLinuxprocess.Theinitprocesstheninitializesthesystemandmovesintoappropriaterunlevels.WhenLinuxbootsintoaspecificrunlevel,itstartsaseriesofservices,includingtheclientassociatedwi

5、ththeNetworkTimeProtocol(NTP).Youcancustomizethisprocess.INSIDETHEEXAMUnderstandingtheBootProcesssingleusermodeispassword-freeaccesstotherootadministrativeaccount.AnearlyreleaseObjectivesrelatedtothebootprocesshaveoftheRHCSAobjectivesincludedthefol-beenconsolidatedinto

6、theRHCSAexam.lowingphrase:“forwhichtherootpasswordisPerhapsthemostbasicskillrelatedtothenotknown.”bootprocessisanunderstandingofthecom-Alsocloselyrelatedisthisobjective,mandsthatstartandstopthebootprocess,focusedontheconfigurationfileassociatedsuchasshutdownandreboot:w

7、ithdifferentrunlevels:■Boot,reboot,andshutdownasystem■Configuresystemstobootintoaspe-normallycificrunlevelautomaticallyOfcourse,thatstartswiththewayaAsLinuxisanetworkoperatingsystem,systemispoweredup.Inthischapter,you’llandasmostuserscan’tdomuchwithoutnet-reviewthestan

8、dardLinuxrunlevels.Fromworking,it’simportanttoknowhowtothestandardRHEL6bootmenu,youneedtoknowhowto:■Configurenetworks