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Linux Troubleshooting
Linux Training Overview

This course is designed to give the Linux system administrator an in-depth look at common and not so common Linux system problems. Linux system problems explored in this course are frequently encountered with the administration of Linux Systems. This course takes the approach to troubleshooting with a "break-fix" philosophy, 25% lecture, and 75% lab intensive content. Lab exercises contain a pool of over 120 simple and complex real-world troubleshooting scenarios. Lab work is flexible enough to satisfy the expectations of experienced to intermediate administrators through ranked difficulty of scenarios. Students will find the approach of this course of structure with flexibility very rewarding. Lab tasks let students choose the type of scenarios they would like to tackle, with hints, helps, and solutions to make learning very effective.

Prerequisites

Equivalent knowledge of the Linux Fundamentals , Enterprise Linux Systems Administration,and Enterprise Linux Network Services courses

Linux Training Course duration

40 Hours

Linux Training Course outline

Section 1 Troubleshooting Methodology

Section 2 Tools

  • Common Troubleshooting Tools RPM Queries and Verification
  • src Packages and spec Files
  • strace, ltrace, lsof and fuser
  • ipcs and ipcrm
  • vmstat, iostat, mpstat, and sar
  • ifconfig, ip, arp and route
  • Name Resolution
  • netstat and rpcinfo
  • nmap and nc
  • tcpdump and ethereal
      Lab 2
  • Exploring and documenting current system configuration state
  • Troubleshooting techniques with RPM, process related tools, and, network related tools
Section 3 Rescue Environments
  • Rescue Procedures
  • Recovery Examples
      Lab 3
  • Using rescue disk
  • Using mount and chroot to access hard disk
  • Reinstalling the MBR with grub-install
  • Setting up networking statically
  • Mounting an NFS share
  • Installing an RPM using the root option
Section 4
  • Linux Boot Process
  • Booting Linux
  • Boot Process Troubleshooting
  • Process Management and Troubleshooting
  • File Systems Concepts and Troubleshooting
  • Backups Concepts and Troubleshooting
      Lab 4
  • Troubleshooting common system and daemon errors
  • Restoring files from backup
  • Booting Scenarios: 6 exercises
  • Process Scenarios: 3 exercises
  • Backup Scenarios: 1 exercise
Section 5
  • Networking Commands Review and Troubleshooting
  • IP Aliases vs Virtual Interfaces
  • xinetd Concepts and Troubleshooting
  • TCP Wrappers Concepts and Troubleshooting
  • iptables Concepts and Troubleshooting
      Lab 5
  • iptables Scenario: 2 exercises
  • Networking Scenarios: 4 exercises
  • TCP Wrappers Scenarios: 2 exercises
  • xinetd Scenarios: 4 exercises
Section 6
  • X11 Concepts, Troubleshooting, and Server Operation
  • X11 Concepts and Troubleshooting
  • Syslog Concepts and Troubleshooting
  • RPM Concepts and Troubleshooting
  • CUPS Troubleshooting
  • at & cron Troubleshooting
      Lab 6
  • at & cron Scenarios: 4 exercises
  • CUPS Scenerio: 2 exercises
  • RPM Scenarios: 4 exercises
  • at/cron Scenarios: 4 exercises
  • Syslog Scenarios: 3 exercises
  • X Scenarios: 7 exercises
Section 7
  • Users and Groups Troubleshooting
  • PAM Concepts and Troubleshooting
  • Filesystem Quotas and Quotas Troubleshooting
  • FACL's and ACL's for users and/or groups
  • File Access Control Lists and Troubleshooting
      Lab 7
  • Filesystem Scenarios: 6 exercises
  • PAM Scenarios: 4 exercises
  • Quota Scenarios: 5 exercises
  • User and Group Scenarios: 5 exercises
Section 8
  • DNS Concepts and Troubleshooting
  • Apache Concepts and Troubleshooting
  • FTP Concepts and Troubleshooting
  • Squid Concepts and Troubleshooting
      Lab 8
  • Apache Scenarios: 5 exercises
  • DNS Scenarios: 4 exercises
  • FTP Scenarios: 2 exercises
  • Squid Scenarios: 4 exercises
Section 9
  • Samba Concepts and Troubleshooting
  • Sendmail Concepts and Troubleshooting
  • Postfix Concepts and Troubleshooting
  • IMAP & POP Concepts and Troubleshooting
      Lab 9
  • IMAP/POP Scenarios: 3 exercises
  • Postfix Scenarios: 5 exercises
  • Samba Scenarios: 3 exercises
  • Sendmail Scenarios: 4 exercises
Section 10
  • Kernel Modules and Troubleshooting
  • Logical Volume Management and Creating Logical Volumes
  • LVM Deployment Issues and Troubleshooting
  • RAID Concepts and Troubleshooting
  • Lightweight Directory Access Protocol and LDAP Troubleshooting
      Lab 10
  • Kernel Module Scenarios: 3 exercises
  • LDAP Scenarios: 3 exercises
  • LVM Scenario: 1 exercise
  • NIS scenarios: 2 exercises
  • RAID Scenario: 3 exercise

 
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