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RH242 - Red Hat Linux Troubleshooting


Duration: 4 Days




Delivery Method:

Software Assurance Value:

Microsoft CPE:

Course Information

Course Description

​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.

Course Objectives

Course Audience

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

Course Outline

Being Proactive, Part 1
Proactively monitor log files, hardware, file systems, and system and network performance
Being Proactive, Part 2
Several approaches to managing configuration changes and developing a recovery plan
Basic Troubleshooting Techniques and Procedures
An introduction to troubleshooting methods, best practices, and tools
Booting Issues
Use recovery runlevels and rescue mode; work with advanced GRUB features
Hardware Issues
Preempting hardware failures (looking for the signs); protecting against hardware failures; redundant configurations; tools to help identify hardware failures and intermittent problems
File System Issues
Locate unauthorized changes; audit software; file system tuning and repair; file recovery
Disk Issues
Rescuing LVM volumes; maintenance of LUKS-encrypted volumes
Networking Issues
Manual configuration of network cards; connectivity issues; network diagnostic tools; monitor packets; tune kernel parameters; troubleshoot SAN communication
Application Issues
An overview of tools and techniques for troubleshooting applications; some common application problems and how to solve them
Security Issues
Working effectively with (and not against) security tools, including SELinux, authentication, and firewall
Red Hat Resources
Support options; Knowledgebase; certified training; initiating support calls; TAM support; developer support; Bugzilla; support workflow; diagnostic and information-gathering tools

Course Prerequisites

  • Red Hat System Administration I and II or Red Hat Certified System administrator. (RHCSA) Rapid Track Course.
  • RHSCA 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 Schedule
This course is not scheduled yet.