Troubleshooting is both an art and a science, an instinct (typically informed by experience) and a technique. In RH142 Linux Troubleshooting Techniques and Tools, participants will learn techniques for troubleshooting a Linux system and will learn to use a variety of troubleshooting tools available on Red Hat Enterprise Linux.
A Red Hat Enterprise Linux system administrator who can identify, diagnose, and resolve problems on a Red Hat Enterprise Linux system, and who can take preventative action to avoid problems.
Unit 1 - Troubleshooting Techniques
An introduction to troubleshooting methods, best practices, and tools.
Unit 2 - Common Troubleshooting Tools
Analysing log files; monitoring file changes; Rebuilding the RPM database.
Unit 3 - Troubleshooting Boot Issues
Working with advanced GRUB features; rescue and GRUB CDs; advanced ext2/ext3 filesystem repair; rescuing RAID and LVM volumes.
Unit 4 - Revision control
An example to track configuration changes with a revision control system.
Unit 5 - Hardware
Preempting hardware failures (looking for the signs); protecting against hardware failures; redundant configurations; tools to help identify hardware failures and intermittent problems.
Unit 6 - Applications
An overview of tools and techniques for troubleshooting applications. Some common application problems and how to solve them.
Unit 7 - Network
Manual configuration of network cards, troubleshooting advanced setups (bonded interfaces, virtual interfaces); connectivity issues; network diagnostic tools.
Unit 8 - Security
Working effectively with (and not against) security tools, including SELinux, SSL, and authentication.
Unit 9 - Red Hat Resources and Reporting Problems
Support options; Knowledgebase; certified training; initiating support calls; TAM support; developer support; bugzillas; support workflow; diagnostic and information-gathering tools.
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.
•Has successfully completed RH131 or RH133; or:
•Holds a current RHCT certification; or:
•Has equivalent system administration knowledge under Red Hat Enterprise Linux. This knowledge includes: installation, service management (using service and chkconfig, for example), basic system monitoring (using ps and top, and perhaps meminfo and the /proc filesystem), filesystem management (using fdisk and mkfs), and basic troubleshooting (including managing log files and perhaps the use of hardware probing tools such as ethtool and lspci).
