LINUX TROUBLESHOOTING – GTU16

Course Description

This course is designed to give Linux administrators experience with both common and uncommon system problems. The course is based on the idea that the best way to learn troubleshooting is to perform troubleshooting. Approximately 25% of class time is spent on lecture, leaving 75% for intensive lab content. Class starts with a discussion of effective troubleshooting technique. Tools and topics are gradually introduced over the course of the week. Students practice applying these tools and techniques in self-paced labs. Students can choose from over 120 scenarios organized by topic and difficulty. Because each scenarios is independent of the others, students can choose scenarios according to their interests and experience. Each scenario is designed to help students develop deeper understanding while exploring the problem. All scenarios includes optional hints designed to reflect a realistic troubleshooting process while only gradually revealing the solution. Students find the flexibility and challenge of this course very rewarding.

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Duration

5 days

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Target Audience

Please contact us for further details.

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Course Prerequisites

This course is designed for intermediate to advanced users. Students should have already taken the following courses, or have equivalent knowledge. A short refresher for each topic will be presented, but will not be discussed in depth.

If have any questions or doubts as to whether you meet the course pre-requisites for this course, or indeed are wondering which is the right course for you, please contact us to discuss your suitability for course attendance.

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Suggested Follow on Courses

There are a number of options of suitable follow-on courses, depending on your business needs. Please contact us for further details.

Supported Distributions

  • Red Hat Enterprise Linux 6
  • SUSE Linux Enterprise 11

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Course Content

1. TROUBLESHOOTING METHODOLOGY

  1. The Troubleshooting Mindset
  2. Evaluating Possible Solutions
  3. Identifying and Implementing Change
  4. Define and Follow Policies
  5. Working with Others
  6. Finding Documentation
  7. Finding Help Online

2. TROUBLESHOOTING TOOLS

  1. Common Troubleshooting Tools
  2. RPM Queries
  3. RPM Verification
  4. SRPM and spec Files
  5. Hardware Discovery Tools
  6. Configuring New Hardware with hwinfo
  7. strace and ltrace
  8. lsof and fuser
  9. ipcs and ipcrm
  10. iostat, mpstat, and vmstat
  11. Using hdparm to Measure
  12. Troubleshooting with the ip command
  13. Name Resolution
  14. netstat and rpcinfo
  15. nmap
  16. Netcat
  17. tcpdump and wireshark

3. RESCUE ENVIRONMENTS

  1. Diagnostic/Recovery Runlevels
  2. Rescue Procedures
  3. Recovery: mount & chroot
  4. Recovery Examples
  5. Recovery: Network Utilities

4. TOPIC GROUP 1

  1. Linux Boot Process
  2. Booting Linux on PCs
  3. Troubleshooting With GRUB
  4. Boot Process Troubleshooting
  5. Troubleshooting: Linux and Init
  6. Process Management
  7. Process Management Tools
  8. Troubleshooting Processes: top
  9. Filesystem Concepts
  10. Filesystem Troubleshooting
  11. Backup Concepts
  12. Backup Troubleshooting
  13. Backup Troubleshooting

5. TOPIC GROUP 2

  1. Networking Tools
  2. Networking Commands Review
  3. Networking Troubleshooting
  4. Networking Troubleshooting
  5. Virtual Interfaces/IP Aliases
  6. Xinetd Concepts
  7. Xinetd Troubleshooting
  8. TCP Wrappers Concepts
  9. TCP Wrappers Concepts
  10. TCP Wrappers Troubleshooting
  11. Netfilter/iptables Concepts
  12. Netfilter/iptables Troubleshooting

6. TOPIC GROUP 3

  1. X11 Concepts
  2. X11 Server Operation
  3. X11 Troubleshooting
  4. Syslog Concepts
  5. syslog-ng Concepts
  6. Syslog Troubleshooting
  7. RPM Concepts
  8. RPM Troubleshooting
  9. Common Unix Printing System (CUPS)
  10. CUPS Troubleshooting
  11. CUPS Troubleshooting
  12. at & cron
  13. at & cron Usage
  14. at & cron Troubleshooting

7. TOPIC GROUP 4

  1. Users and Groups
  2. Users and Groups Troubleshooting
  3. PAM Concepts
  4. PAM Troubleshooting
  5. Filesystem Quotas
  6. Quotas Troubleshooting
  7. File Access Control Lists
  8. FACL Troubleshooting
  9. SELinux Concepts
  10. SELinux Troubleshooting
  11. SELinux Troubleshooting Continued

8. TOPIC GROUP 5

  1. Kernel Modules
  2. Kernel Modules Troubleshooting
  3. Logical Volume Management
  4. Creating Logical Volumes
  5. LVM Deployment Issues
  6. VG Migration, PV Resizing & Troubeshooting
  7. Software RAID Overview
  8. RAID Troubleshooting
  9. LDAP and OpenLDAP
  10. Troubleshooting OpenLDAP

9. TOPIC GROUP 6

  1. DNS Concepts
  2. DNS Troubleshooting
  3. DNS Troubleshooting
  4. Apache Concepts
  5. Apache Troubleshooting
  6. Apache Troubleshooting
  7. FTP Concepts
  8. FTP Troubleshooting
  9. Squid Concepts
  10. Squid Troubleshooting

10. TOPIC GROUP 7

  1. Samba Concepts
  2. Samba Troubleshooting
  3. Postfix Concepts
  4. Postfix Troubleshooting
  5. Postfix Troubleshooting
  6. Sendmail Concepts
  7. Sendmail Troubleshooting
  8. IMAP & POP Concepts
  9. IMAP/POP Troubleshooting

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