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Red Hat Linux Troubleshooting (RH242)

Course Description Schedule Course Outline

Course Content

In Red Hat® Linux® Troubleshooting (RH242), system administrators will learn techniques for troubleshooting a Linux system and how to use the troubleshooting tools available on Red Hat Enterprise Linux 6.

This course relates to Red Hat Enterprise Linux 6. It is a heavily lab-oriented class designed to help the student learn or improve troubleshooting skills. Students will gain troubleshooting experience by debugging live, virtualized systems.

Who should attend

  • Experienced Linux system administrators who have responsibilities that include troubleshooting their enterprise Linux environment.


  • Red Hat System Administration I and II or Red Hat Certified System Administrator (RHCSA) Rapid Track Course
  • RHCSA certification holder or equivalent experience
  • Have system administration knowledge under Red Hat Enterprise Linux, including:
    • Installation
    • Service management (using service and chkconfig, for example)
    • Basic system monitoring (using ps and top, and perhaps meminfo and the /proc file system)
    • File system management (using fdisk and mkfs)
    • Basic troubleshooting (including managing log files and perhaps the use of hardware probing tools, such as ethtool and lspci)

Course Objectives

During this course, you will learn:

  • Introduction to troubleshooting techniques, including being prepared
  • Troubleshooting hardware, including listing, testing, and analyzing devices
  • Troubleshooting applications, including diagnosing performance problems and investigating application and OS interactions
  • Troubleshooting disks and file systems, including LVM, LUKS, ext3/4, and unauthorized changes
  • Troubleshooting the network, including configuring, testing, and diagnosing problems with basic and advanced configurations
  • Security, including working effectively with (and not against) security tools like SELinux, authentication, and firewall
  • Making the most of Red Hat support resources

Outline: Red Hat Linux Troubleshooting (RH242)

Module 1: Being Proactive, Part 1

  • Proactively monitor log files, hardware, file systems, and system and network performance

Module 2: Being Proactive, Part 2

  • Several approaches to managing configuration changes and developing a recovery plan

Module 3: Basic Troubleshooting Techniques and Procedures

  • An introduction to troubleshooting methods, best practices, and tools

Module 4: Booting Issues

  • Use recovery runlevels and rescue mode; work with advanced GRUB features

Module 5: Hardware Issues

  • Preempting hardware failures (looking for the signs); protecting against hardware failures; redundant configurations; tools to help identify hardware failures and intermittent problems

Module 6: File System Issues

  • Locate unauthorized changes; audit software; file system tuning and repair; file recovery

Module 7: Disk Issues

  • Rescuing LVM volumes; maintenance of LUKS-encrypted volumes

Module 8: Networking Issues

  • Manual configuration of network cards; connectivity issues; network diagnostic tools; monitor packets; tune kernel parameters; troubleshoot SAN communication

Module 9: Application Issues

  • An overview of tools and techniques for troubleshooting applications; some common application problems and how to solve them

Module 10: Security Issues

  • Working effectively with (and not against) security tools, including SELinux, authentication, and firewall

Module 11: Red Hat Resources

  • Support options; Knowledgebase; certified training; initiating support calls; TAM support; developer support; Bugzilla; support workflow; diagnostic and information-gathering tools
Classroom Training
Modality: G

Duration 4 days

  • Canada: CAD 4,100
Dates and Booking
Online Training
Modality: U

Duration 4 days

  • Canada: CAD 4,100
Dates and Booking

Currently there are no training dates scheduled for this course.  Enquire a date