RH242

Red Hat Linux Troubleshooting

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Troubleshooting is both an art and a science. An instinct and a technique. 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. This course is a four-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.

Course Content:

  • 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

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

Course outline:
Techniques for troubleshooting a Linux system

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

  • 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.

NOTE: Course outline is subject to change with technology advances and as the nature of the underlying job evolves. For questions or confirmation on a specific objective or topic, please contact a training specialist.

Fakta

Kurs
RH242
Längd
4 dagar

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Förkunskaper

•Red Hat System Administration I and II or 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

Kursmaterial

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