Red Hat Linux Troubleshooting (RH242)

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.

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