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CompTIA Linux+ XK0-005 Exam Cram (2022) - Document preview page 1

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CompTIA Linux+ XK0-005 Exam Cram (2022)

Ace your certification with CompTIA Linux+ XK0-005 Exam Cram (2022), packed with essential study resources.

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CompTIA Linux+ XK0-005 Exam Cram (2022) - Page 5 preview imageAboutThiseBookePUBisanopen,industry-standardformatforeBooks.However,supportofePUBanditsmanyfeaturesvariesacrossreadingdevicesandapplications.Useyourdeviceorappsettingstocustomizethepresentationtoyourliking.Settingsthatyoucancustomizeoftenincludefont,fontsize,singleordoublecolumn,landscapeorportraitmode,andfiguresthatyoucanclickortaptoenlarge.Foradditionalinformationaboutthesettingsandfeaturesonyourreadingdeviceorapp,visitthedevicemanufacturer’sWebsite.Manytitlesincludeprogrammingcodeorconfigurationexamples.Tooptimizethepresentationoftheseelements,viewtheeBookinsingle-column,landscapemodeandadjustthefontsizetothesmallestsetting.Inadditiontopresentingcodeandconfigurationsinthereflowabletextformat,wehaveincludedimagesofthecodethatmimicthepresentationfoundintheprintbook;therefore,wherethereflowableformatmaycompromisethepresentationofthecodelisting,youwillseea“Clickheretoviewcodeimage”link.Clickthelinktoviewtheprint-fidelitycodeimage.Toreturntothepreviouspageviewed,clicktheBackbuttononyourdeviceorapp.
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CompTIA Linux+ XK0-005 Exam Cram (2022) - Page 6 preview imageEXAMCRAMCompTIA®Linux+®XKO0-005ExamCramWilliam“Bo”Rothwell
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CompTIA Linux+ XK0-005 Exam Cram (2022) - Page 7 preview imageCompTIA®Linux+®XK0-005ExamCramCopyright©2023byPearsonEducation,Inc.Allrightsreserved.Thispublicationisprotectedbycopyright,andpermissionmustbeobtainedfromthepublisherpriortoanyprohibitedreproduction,storageinaretrievalsystem,ortransmissioninanyformorbyanymeans,electronic,mechanical,photocopying,recording,orlikewise.Forinformationregardingpermissions,requestforms,andtheappropriatecontactswithinthePearsonEducationGlobalRights&PermissionsDepartment,pleasevisitwww.pearson.com/permissions.Nopatentliabilityisassumedwithrespecttotheuseoftheinformationcontainedherein.Althougheveryprecautionhasbeentakeninthepreparationofthisbook,thepublisherandauthorassumenoresponsibilityforerrorsoromissions.Norisanyliabilityassumedfordamagesresultingfromtheuseoftheinformationcontainedherein.ISBN-13:978-0-13-789855-8ISBN-10:0-13-789855-XLibraryofCongressControlNumber:2022910969ScoutAutomatedPrintCodeTrademarksAlltermsmentionedinthisbookthatareknowntobetrademarksorservicemarkshavebeenappropriatelycapitalized.PearsonITCertificationcannotattesttotheaccuracyofthisinformation.Useofaterminthisbookshouldnotberegardedasaffectingthevalidityofanytrademarkorservicemark.WarningandDisclaimerThisbookisdesignedtoprovideinformationabouttheCompTIA®Linux+®(XKO0-005)certification.Everyefforthasbeenmadetomakethisbookascompleteandasaccurateaspossible,butnowarrantyorfitnessisimplied.SpecialSales
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CompTIA Linux+ XK0-005 Exam Cram (2022) - Page 8 preview imageForinformationaboutbuyingthistitleinbulkquantities,orforspecialsalesopportunities(whichmayincludeelectronicversions;customcoverdesigns;andcontentparticulartoyourbusiness,traininggoals,marketingfocus,orbrandinginterests),pleasecontactourcorporatesalesdepartmentatcorpsales@pearsoned.comor(800)382-3419.Forgovernmentsalesinquiries,pleasecontactgovernmentsales@pearsoned.com.ForquestionsaboutsalesoutsidetheU.S.,pleasecontactintlcs@pearson.com.Editor-in-ChiefMarkL.TaubDirector,ITPProductManagementBrettBartowExecutiveEditorNancyDavisDevelopmentEditorChristopherA.ClevelandManagingEditorSandraSchroederProjectEditorMandieFrankCopyEditorKittyWilsonIndexerErikaMillenProofreaderDonnaE.MulderTechnicalEditorCaseyBoylesPublishingCoordinatorCindyTeeters
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CompTIA Linux+ XK0-005 Exam Cram (2022) - Page 9 preview imageDesignerChutiPrasertsithCompositorcodeMantra1StudyX
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CompTIA Linux+ XK0-005 Exam Cram (2022) - Page 10 preview image’...Pearson’sCommitmenttoDiversity,..Equity,andInclusionPearsonisdedicatedtocreatingbias-freecontentthatreflectsthediversityofalllearners.Weembracethemanydimensionsofdiversity,includingbutnotlimitedtorace,ethnicity,gender,socioeconomicstatus,ability,age,sexualorientation,andreligiousorpoliticalbeliefs.Educationisapowerfulforceforequityandchangeinourworld.Ithasthepotentialtodeliveropportunitiesthatimprovelivesandenableeconomicmobility.Asweworkwithauthorstocreatecontentforeveryproductandservice,weacknowledgeourresponsibilitytodemonstrateinclusivityandincorporatediversescholarshipsothateveryonecanachievetheirpotentialthroughlearning.Astheworld’sleadinglearningcompany,wehaveadutytohelpdrivechangeandliveuptoourpurposetohelpmorepeoplecreateabetterlifeforthemselvesandtocreateabetterworld.OurambitionistopurposefullycontributetoaworldwhereEveryonehasanequitableandlifelongopportunitytosucceedthroughlearningOureducationalproductsandservicesareinclusiveandrepresenttherichdiversityoflearnersOureducationalcontentaccuratelyreflectsthehistoriesandexperiencesofthelearnersweserveOureducationalcontentpromptsdeeperdiscussionswithlearnersandmotivatesthemtoexpandtheirownlearning(andworldview)Whileweworkhardtopresentunbiasedcontent,wewanttohearfromyouaboutanyconcernsorneedswiththisPearsonproductsothatwecaninvestigateandaddressthem.Pleasecontactuswithconcernsaboutanypotentialbiasathttps://www.pearson.com/report-bias.xhtml.
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CompTIA Linux+ XK0-005 Exam Cram (2022) - Page 11 preview imageContentsataGlancePartI:SystemManagementCHAPTER1:LinuxFundamentalsCHAPTER2:ManageFilesandDirectoriesCHAPTER3:ConfigureandManageStorageUsingtheAppropriateToolsCHAPTER4:ConfigureandUsetheAppropriateProcessesandServicesCHAPTER5:UsetheAppropriateNetworkingToolsorConfigurationFilesCHAPTER6:BuildandInstallSoftwarePartII:SecurityCHAPTER7:ManageSoftwareConfigurationsCHAPTER8:SecurityBestPracticesinaLinuxEnvironmentCHAPTER9:ImplementIdentityManagementCHAPTER10:ImplementandConfigureFirewallsCHAPTER11:ConfigureandExecuteRemoteConnectivityforSystemManagementCHAPTER12:ApplytheAppropriateAccessControlsPartIII:Scripting,Containers,andAutomationCHAPTER13:CreateSimpleShellScriptstoAutomateCommonTasksCHAPTER14:PerformBasicContainerOperations
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CompTIA Linux+ XK0-005 Exam Cram (2022) - Page 12 preview imageCHAPTER15:PerformBasicVersionControlUsingGitCHAPTER16:CommonInfrastructureasCodeTechnologiesCHAPTER17:Container,Cloud,andOrchestrationConceptsPartIV:TroubleshootingCHAPTER18:AnalyzeandTroubleshootStorageIssuesCHAPTER19:AnalyzeandTroubleshootNetworkResourceIssuesCHAPTER20:AnalyzeandTroubleshootCentralProcessingUnit(CPU)andMemoryIssuesCHAPTER21:AnalyzeandTroubleshootUserAccessandFilePermissionsCHAPTER22:UsesystemdtoDiagnoseandResolveCommonProblemswithaLinuxSystemIndex
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CompTIA Linux+ XK0-005 Exam Cram (2022) - Page 13 preview imageTableofContentsIntroductionPartI:SystemManagementCHAPTER1:LinuxFundamentalsFilesystemHierarchyStandard(FHS)BasicBootProcessBasicInput/OutputSystem(BIOS)/UnifiedExtensibleFirmwareInterface(UEFT)Commandsinitrd.imgvmlinuzGrandUnifiedBootloaderVersion2(GRUB2)BootSourcesKernelPanicDeviceTypesin/devBlockDevicesCharacterDevicesSpecialCharacterDevicesBasicPackageCompilationfromSource./configuremakemakeinstallStorageConceptsFileStorageBlockStorage
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CompTIA Linux+ XK0-005 Exam Cram (2022) - Page 14 preview imageObjectStoragePartitionTypeFilesysteminUserspace(FUSE)RedundantArrayofIndependent(orInexpensive)Disks(RAID)LevelsListingHardwareInformationIspciIsusbdmidecodeCHAPTER2:ManageFilesandDirectoriesFileEditingsedawkprintfnanoviFileCompression,Archiving,andBackupgzipbzip2ziptarXzcpioddFileMetadatastatfileSoftandHardLinks
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CompTIA Linux+ XK0-005 Exam Cram (2022) - Page 15 preview imageSymbolic(Soft)LinksHardLinksCopyingFilesBetweenSystemsrsyncscpncFileandDirectoryOperationsmvcpmkdirrmdirIspwdrmcd.(CurrentDirectory)..(LevelAbovetheCurrentDirectory)~(User’sHomeDirectory)treecattouchCHAPTER3:ConfigureandManageStorageUsingtheAppropriateToolsDiskPartitioningfdiskpartedpartprobeMountingLocalandRemoteDevicessystemd.mount
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CompTIA Linux+ XK0-005 Exam Cram (2022) - Page 16 preview image/etc/fstabmountLinuxUnifiedKeySetup(LUKS)FilesystemManagementXFSToolsext4ToolsBtrfsToolsMonitoringStorageSpaceandDiskUsagedfduCreatingandModifyingVolumesUsingLogicalVolumeManager(LVM)pvsvgsIvsIvchangeIvcreatevgcreateIvresizepvcreatevgextendInspectingRAIDImplementationsmdadm/proc/mdstatStorageAreaNetwork(SAN)/Network-AttachedStorage(NAS)multipathdNetworkFilesystemsStorageHardwareIsscsiIsblk
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CompTIA Linux+ XK0-005 Exam Cram (2022) - Page 17 preview imageblkidfestatCHAPTER4:ConfigureandUsetheAppropriateProcessesandServicesSystemServicessystemctlstopstartrestartstatusenabledisablemaskSchedulingServicescroncrontabatProcessManagementKillSignalsListingProcessesandOpenFilesSettingPrioritiesProcessStatesJobControlpgreppkillpidofCHAPTER5:UsetheAppropriateNetworkingToolsorConfigurationFilesInterfaceManagement
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CompTIA Linux+ XK0-005 Exam Cram (2022) - Page 18 preview imageiproute2ToolsNetworkManagernet-tools/etc/sysconfig/network-scripts/NameResolutionnsswitch/etc/resolv.confsystemdBind-utilsWHOISNetworkMonitoringtcpdumpWireshark/tsharknetstattraceroutepingmtrRemoteNetworkingToolsSecureShell(SSH)cURLwgetncrsyncSecureCopyProtocol(SCP)SSHFileTransferProtocol(SFTP)CHAPTER6:BuildandInstallSoftwarePackageManagementDNF
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CompTIA Linux+ XK0-005 Exam Cram (2022) - Page 19 preview imageYUMAPTRPMdpkgZYppSandboxedApplicationssnapdFlatpakAppImageSystemUpdatesKernelUpdatesPackageUpdatesPartII:SecurityCHAPTER7:ManageSoftwareConfigurationsUpdatingConfigurationFilesProcedures.rpmnew.rpmsaveRepositoryConfigurationFilesConfigureKernelOptionsParametersModulesConfigureCommonSystemServicesSSHNetworkTimeProtocol(NTP)SyslogchronyLocalization
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CompTIA Linux+ XK0-005 Exam Cram (2022) - Page 20 preview imagetimedatectllocalectlCHAPTER8:SecurityBestPracticesinaLinuxEnvironmentManagingPublicKeyInfrastructure(PKI)CertificatesPublicKeyPrivateKeySelf-SignedCertificateDigitalSignatureWildcardCertificateHashingCertificateAuthoritiesCertificateUseCasesSecureSocketsLayer(SSL)/TransportLayerSecurity(TLS)CertificateAuthenticationEncryptionAuthenticationTokensMultifactorAuthentication(MFA)PluggableAuthenticationModules(PAM)SystemSecurityServicesDaemon(SSSD)LightweightDirectoryAccessProtocol(LDAP)SingleSign-on(SSO)LinuxHardeningSecurityScanningSecureBoot(UEFI)SystemLoggingConfigurationsSettingDefaultumaskDisabling/RemovingInsecureServices
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CompTIA Linux+ XK0-005 Exam Cram (2022) - Page 21 preview imageEnforcingPasswordStrengthRemovingUnusedPackagesTuningKernelParametersSecuringServiceAccountsConfiguringtheHostFirewallCHAPTER9:ImplementIdentityManagementAccountCreationandDeletionuseraddgroupadduserdelgroupdelusermodgroupmodidwhowDefaultShell/etc/passwd/etc/group/etc/shadow/etc/profile/etc/skel.bash_profile.bashrcAccountManagementpasswdchagepam_tally2
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CompTIA Linux+ XK0-005 Exam Cram (2022) - Page 22 preview imagefaillock/etc/login.defsCHAPTER10:ImplementandConfigureFirewallsFirewallUseCasesOpenandClosePortsCheckCurrentConfigurationEnable/DisableInternetProtocol(IP)ForwardingCommonFirewallTechnologiesfirewalldiptablesnftablesUncomplicatedFirewall(UFW)KeyFirewallFeaturesZonesServicesStateful/StatelessCHAPTER11:ConfigureandExecuteRemoteConnectivityforSystemManagementSSH~/.ssh/known_hosts~/.ssh/authorized_keys/etc/ssh/sshd_config/etc/ssh/ssh_config~/.ssh/configssh-keygenssh-copy-idssh-addTunneling
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CompTIA Linux+ XK0-005 Exam Cram (2022) - Page 23 preview imageExecutingCommandsasAnotherUser/etc/sudoersPolicyKitRulessudovisudosu-pkexecCHAPTER12:ApplytheAppropriateAccessControlsFilePermissionsAccessControlList(ACL)SetUserID(SUID),SetGroupID(SGID),andStickyBitSecurity-EnhancedLinux(SELinux)ContextPermissionsLabelsAutorelabelSystemBooleansStatesPolicyTypesAppArmorCommand-LineUtilitieschmodumaskchownsetfacl/getfaclIssetenforcegetenforcechattr/Isattr
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CompTIA Linux+ XK0-005 Exam Cram (2022) - Page 24 preview imagechgrpsetseboolgetseboolchconrestoreconsemanageaudit2allowPartIII:Scripting,Containers,andAutomationCHAPTER13:CreateSimpleShellScriptstoAutomateCommonTasksShellScriptElementsLoopswhileforuntilConditionalsifswitch/caseShellParameterExpansionComparisonsVariablesSearchandReplaceRegularExpressionsStandardStreamRedirection&&HereDocumentsExitCodesShellBuilt-inCommands
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CompTIA Linux+ XK0-005 Exam Cram (2022) - Page 25 preview imageCommonScriptUtilitiesawkSedfindxargsgrepegrepteewccuttrheadtailEnvironmentVariables$PATH$SHELL$?RelativeandAbsolutePathsCHAPTER14:PerformBasicContainerOperationsContainerManagementStarting/StoppingInspectingListingDeployingExistingImagesConnectingtoContainersLoggingExposingPortsContainerImageOperations
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CompTIA Linux+ XK0-005 Exam Cram (2022) - Page 26 preview imagebuildpushpulllistrmiCHAPTER15:PerformBasicVersionControlUsingGitIntroductiontoVersionControlandGitTheThirdGenerationclonepushpullcommitaddbranch/checkouttaggitignoreCHAPTER16:CommonInfrastructureasCodeTechnologiesFileFormatsJavaScriptObjectNotation(JSON)YAMLAin’tMarkupLanguage(YAML)UtilitiesAnsiblePuppetChefSaltStackTerraformContinuousIntegration/ContinuousDeployment(CI/CD)
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CompTIA Linux+ XK0-005 Exam Cram (2022) - Page 27 preview imageAdvancedGitTopicsmergerebasePullRequestsCHAPTER17:Container,Cloud,andOrchestrationConceptsKubernetesBenefitsandApplicationUseCasesPodsSidecarsAmbassadorContainersSingle-Node,MulticontainerUseCasesComposeContainerPersistentStorageContainerNetworksOverlayNetworksBridgingNetworkAddressTranslation(NAT)HostServiceMeshBootstrappingCloud-initContainerRegistriesPartIV:TroubleshootingCHAPTER18:AnalyzeandTroubleshootStorageIssuesHighLatencyInput/Output(I/O)WaitInput/OutputOperationsperSecond(IOPS)Scenarios
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CompTIA Linux+ XK0-005 Exam Cram (2022) - Page 28 preview imageLowIOPSCapacityIssuesLowDiskSpaceInodeExhaustionFilesystemIssuesCorruptionMismatchI/OSchedulerDeviceIssuesNon-volatileMemoryExpress(NVMe)Solid-StateDrive(SSD)SSDTrimRAIDLVM1/0ErrorsMountOptionProblemsCHAPTER19:AnalyzeandTroubleshootNetworkResourceIssuesNetworkConfigurationIssuesSubnetRoutingFirewallIssuesInterfaceErrorsDroppedPacketsCollisionsLinkStatusBandwidthLimitationsHighLatencyNameResolutionIssues
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CompTIA Linux+ XK0-005 Exam Cram (2022) - Page 29 preview imageDomainNameSystem(DNS)TestingRemoteSystemsnmapopenssls_clientCHAPTER20:AnalyzeandTroubleshootCentralProcessingUnit(CPU)andMemoryIssuesRunawayProcessesZombieProcessesHighCPUUtilizationHighLoadAverageHighRunQueuesCPUTimesCPUProcessPrioritiesnicereniceMemoryExhaustionFreeMemoryvs.FileCacheOutofMemory(OOM)MemoryLeaksProcessKillerSwappingHardwareIscpuIsmem/proc/cpuinfo/proc/meminfoCHAPTER21:AnalyzeandTroubleshootUserAccessandFilePermissions
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CompTIA Linux+ XK0-005 Exam Cram (2022) - Page 30 preview imageUserLoginIssuesLocalUserFileAccessIssuesGroupContextPermissionACLAttributePasswordIssuesPrivilegeElevationQuotaIssuesCHAPTER22:UsesystemdtoDiagnoseandResolveCommonProblemswithaLinuxSystemUnitFilesServiceTimerMountTargetCommonProblemsNameResolutionFailureApplicationCrashTime-zoneConfigurationBootIssuesJournalIssuesServicesNotStartingonTimeIndex
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CompTIA Linux+ XK0-005 Exam Cram (2022) - Page 31 preview imageFigureCreditsFigureCreditFigures1.3,1.4,2.2GNUProjectFigures2.3,4.2,5.2,6.2,14.1-14.8,19.1,19.2,LinuxKernel20.1,20.2Organization,IncFigure5.1WiresharkFigure11.1Mozilla.org
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