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Red Hat Enterprise Linux Systems Administration (Troubleshooting Techniques and Tools)
Linux Training Overview

This course will teach the commands and methods needed to perform troubleshooting networking, security, and performance issues on a functioning RHEL5 system. The course will also use a problem solving approach in the lab exercises to teach system administrators a methodology of: discovery, analysis, tools, and solution in each area that is covered.

This course is the equivalent to Red Hat course 142.

Systems: Red Hat Enterprise Linux Version 5 (all update levels)

Linux Training Prerequisites

It is assumed that the participant has successfully completed the Red Hat Linux Essentials (RH 033) and RHEL5 Systems Administration Essentials (RH 131) courses, or has equivalent system time as a user and a working systems administrator

Linux Training Course duration

This course normally requires three (3) days, approximately 60% lecture, and 40% lab time.

Linux Training Course Objectives

On completion of this course, a systems administrator should be able to use a methodology to analyze and solve problems with system components, along with usage of tools to proactively identify issues as they occur (or before they occur).

Linux Training Course outline

Review of System Concepts for System Administrators
  • System administrator functions
  • Using the root account
  • root access via sudo
  • Using the RHEL5 administrative graphical interfaces
  • Manipulating root account history files
  • Installing and using webmin for remote administration
Overview of Troubleshooting Techniques
  • methodologies
  • available tools
    • in RHEL5 distributions
    • third party
    • freeware
    • system-specific ( "home-grown" )
Startup Time Issues and Resolutions
  • review of boot time components
  • troubleshooting GRUB problems
  • building GRUB recovery boot media
  • alternate methods of booting
    • single user mode
    • recovery or installation media
  • fixing problems with filesystem structures
  • resolving issues with LVM boot file systems
RHEL5 Hardware Configuration
  • location of key files and descriptions
  • tools to manipulate hardware configuration files
  • understanding hardware discovery and drivers
  • diagnostic tools to test hardware components
RHEL5 Software Configuration
  • location of key files and descriptions
  • tools to manipulate configuration files
Networking Troubleshooting Considerations
  • review of networking hardware / software components
  • techniques to manually configure network interfaces
  • software IP configuration / testing using ifconfig
  • testing areas and tools
    • network connectivity
    • server configuration (files)
    • DNS, VSFTPD, DHCPD, SAMBA
  • available tools
Security Issues
  • review of security in all major component areas
  • impact of selected security level
    • default from installation
    • SELinux
    • via "hardening" tools
  • PAM
    • security role in RHEL5
    • functional areas
    • files and configuration
    • resolving issues with PAM controls
  • security monitoring / troubleshooting tools
Application Troubleshooting
  • writing utilities to sense problems
    • physical memory usage
    • paging file
    • disk and network I/O bandwidth
Resources for Troubleshooting Information
  • on-line searchable repositories
  • available diagnostic tools (summary)
  • Red Hat support options



 
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