Overview

Senior system administrators who are interested in troubleshooting more are the target audience for this course.Every section of this course has a different set of quizzes, and there is also many project lab assignment that will help you demonstrate what you have learned.Linux Diagnostics And TroubleshootingCourse ContentIntroductionWhat is troubleshooting?Troubleshooting a login issueCollecting InformationSystem JournalTroubleshoot a web server issue using the log filesUsing Red Hat ResourcesCollecting Information with SOSREPORTPractice Lab SessionTroubleshoot a FTP Connectivity IssueQuiz - MCQMonitoring SystemsSystem Monitoring with CockpitPerformance Co-Pilot or pcpCentralized log server using rsyslogPractice Lab SessionIntrusion detection software to monitor changesAdvanced Intrusion Detection Environment (AIDE)Practice Lab SessionSystem Auditing with auditdQuiz - MCQIdentifying Hardware IssuesIdentify various hardware and their problemsHardware Error Reporting using mcelog and rasdaemonMemory Testing using memtest86+ packageManaging Kernel ModulesLoading and unloading modulesManaging module optionsTroubleshooting to disable MSI-X interrupt handling in the driverQuiz - MCQTroubleshooting Storage IssuesOverview of Linux Storage StackVirtual File SystemFilesystems & Device ManagerDevice Mapper MultipathRecovering from File System CorruptionChecking & Repairing ext3/ext4 fs using e2fsckChecking & Repairing xfs fs using xfs_repairRecovering LVM IssuesPractice Lab Session - using vgcfgrestoreMigrating a Volume Group from one system to anotherRecovering Metadata in LVMPractice Lab SessionConfiguration of Iscsi target & InitiatorPractice Lab Session on iscsi target & initiator - 1Practice Lab Session on iscsi target & initiator - 2Quiz - MCQTroubleshooting RPM IssuesResolve package management dependency issuesIdentify & fix dependency issueRecover a corrupted RPM DatabaseWorking with transaction history using Yum commandReverting & repeating transaction using yum commandPractice Lab SessionQuiz - MCQTroubleshooting a Network IssuesCheck Network ConnectivityScanning Network Ports using nmapCommunicating with a remote service using nc commandMonitoring Network traffic using iptraf-ngTroubleshooting a network issue (One network interface is not working properly)Troubleshooting tips related with device names of ethernet interfaceDisable consistent network device namingOverview NetworkManagerPractice Lab SessionCapturing Packets with tcpdumpPractice Lab SessionsQuiz - MCQTroubleshooting a Boot IssuesLinux Boot processBooting of RHEL 7 with systemdOverview of Grub2Grub2 featuresBooting into Grub MenuProtect Grub by appying a passwordLab on Basic System Recovery (Initramfs file missing/Corrupted)Lab on Basic System Recovery (Grub related issues like grub is missing)Lab on Basic System Recovery (Master Boot Record missing/corrupted)Rescue Modue in RHEL 7Practice Lab SessionReset the root passwd using installation diskReset the root passwd using rd.breakRepairing File System Issues at bootFix issues at /etc/fstab at boot - Lab SessionAssignment - This lab project assignment aims to explore some common Red Hat Linux boot issues and provide solutions to resolve them.Troubleshooting a Security IssuesTroubleshooting a SELinux IssueChanging SELinux contexttroubleshooting ftp connectivity issue using booleansSELinux Audit Logs & TroubleshootingOverview of PAM SecurityConcepts of PAMPAM Modules & ConfigurationsPAM Module GroupsControl Flags in PAMPAM Moduleslast lecture

Skills

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