Two-Minute Drill


Here are some of the key points from the certification objectives in Chapter 16. Troubleshooting Strategies

  

During the Troubleshooting and System Maintenance exam, use your experience. You may have seen the problem before.

  

If you aren't sure about a problem, try the simplest solution first. q If all else fails, use the scientific method.

  

Know how to boot Linux into different runlevels; it can help you bypass many problems and boot a system.

  

RHCE candidates should also know how to boot Linux from the first installation CD, using linux rescue mode.

Required RHCT Troubleshooting Skills

  

Misconfigured networking can be diagnosed with key commands such as ifconfig and ping. It can be corrected in related configuration files or with the Red Hat Network Configuration tool.

  

Misconfigured hostname resolution problems relate to connections to /etc/ hosts or DNS servers.

  

Configure the X Window System using the Red Hat Display Configuration tool, commands such as Xorg -configure, or by directly editing /etc/X11/xorg.conf.

  

Configure a desktop environment and login manager with key configuration files such as /etc/X11/prefdm and /etc/X11/xinit/xinitrc.

Required RHCE Troubleshooting Skills

  

Knowing how to diagnose and correct boot failures means knowing the GRUB configuration file and command line.

  

Understand how to manage boot modules with the correct initial RAM disk.

  

If there are filesystem errors, they may show up during the boot process and require that you use commands such as fsck to diagnose and solve them.

  

Adding, removing, and resizing LVs require skills described in detail in Chapter 8.

  

Know how to diagnose and solve service issues as described throughout this book.

  

Use the Setroubleshoot browser to diagnose network service problems related to SELinux.



RHCE Red Hat Certified Engineer Linux Study Guide (Exam RH302)
Linux Patch Management: Keeping Linux Systems Up To Date
ISBN: 0132366754
EAN: 2147483647
Year: 2004
Pages: 227
Authors: Michael Jang

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