Red Hat Linux Troubleshooting (RH242)

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Overview

System administrators will learn techniques for troubleshooting a Linux system and how to use the troubleshooting tools available on Red Hat Enterprise Linux.

Objectives

This course is a 4-day, heavily lab-oriented class designed to help the student learn or improve troubleshooting skills. Students will gain troubleshooting experience by debugging live, virtualized systems.

Audience

Linux system administrators who understand how to install and configure a Red Hat Enterprise Linux system and who wish to deepen their understanding of troubleshooting on Linux.

Syllabus

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.

Training provider

Teaching mode:
Classroom - Instructor Led
Online - Instructor Led
Duration: 4 days
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