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. 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.
Experienced Linux system administrators who have responsibilities that include troubleshooting their enterprise Linux environment.
Full Course Outline
- Proactively monitor log files, hardware, file systems, and system and network performance
- Several approaches to managing configuration changes and developing a recovery plan
- An introduction to troubleshooting methods, best practices, and tools
- Use recovery runlevels and rescue mode; work with advanced GRUB features
- Preempting hardware failures (looking for the signs); protecting against hardware failures; redundant configurations; tools to help identify hardware failures and intermittent problems
- Locate unauthorized changes; audit software; file system tuning and repair; file recovery
- Rescuing LVM volumes; maintenance of LUKS-encrypted volumes
- Manual configuration of network cards; connectivity issues; network diagnostic tools; monitor packets; tune kernel parameters; troubleshoot SAN communication
- An overview of tools and techniques for troubleshooting applications; some common application problems and how to solve them
- Working effectively with (and not against) security tools, including SELinux, authentication, and firewall
- Support options; Knowledgebase; certified training; initiating support calls; TAM support; developer support; Bugzilla; support workflow; diagnostic and information-gathering tools