Linux Troubleshooting Workshop

Course:  LNXFIX
Duration:  5 Days
Level:  III
Course Summary

The Linux Troubleshooting 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 scenario 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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Topics Covered In This Course

Troubleshooting Methodology

  • The Troubleshooting Mindset
  • Evaluating Possible Solutions
  • Identifying and Implementing Change
  • Define and Follow Policies
  • Working with Others
  • Finding Documentation
  • Finding Help Online

Troubleshooting Tools

  • Common Troubleshooting Tools
  • RPM Queries
  • RPM Verification
  • SRPM and spec Files
  • Hardware Discovery Tools
  • Configuring New Hardware with hwinfo
  • strace and ltrace
  • lsof and fuser
  • ipcs and ipcrm
  • iostat, mpstat, and vmstat
  • Using hdparm to Measure
  • Troubleshooting with the ip command
  • Name Resolution
  • netstat and rpcinfo
  • nmap
  • Netcat
  • tcpdump and wireshark

Rescue Environments

  • Diagnostic/Recovery Runlevels
  • Rescue Procedures
  • Recovery: mount & chroot
  • Recovery Examples
  • Recovery: Network Utilities

Troubleshooting Group 1

  • Linux Boot Process
  • Booting Linux on PCs
  • Troubleshooting With GRUB
  • Boot Process Troubleshooting
  • Troubleshooting: Linux and Init
  • Process Management
  • Process Management Tools
  • Troubleshooting Processes: top
  • Filesystem Concepts
  • Filesystem Troubleshooting
  • Backup Concepts
  • Backup Troubleshooting
  • Backup Troubleshooting

Troubleshooting Group 2

  • Networking Tools
  • Networking Commands Review
  • Networking Troubleshooting
  • Networking Troubleshooting
  • Virtual Interfaces/IP Aliases
  • Xinetd Concepts
  • Xinetd Troubleshooting
  • TCP Wrappers Concepts
  • TCP Wrappers Concepts
  • TCP Wrappers Troubleshooting
  • Netfilter/iptables Concepts
  • Netfilter/iptables Troubleshooting

Troubleshooting Group 3

  • X11 Concepts
  • X11 Server Operation
  • X11 Troubleshooting
  • Syslog Concepts
  • syslog-ng Concepts
  • Syslog Troubleshooting
  • RPM Concepts
  • RPM Troubleshooting
  • Common Unix Printing System (CUPS)
  • CUPS Troubleshooting
  • CUPS Troubleshooting
  • at & cron
  • at & cron Usage
  • at & cron Troubleshooting

Troubleshooting Group 4

  • Users and Groups
  • Users and Groups Troubleshooting
  • PAM Concepts
  • PAM Troubleshooting
  • Filesystem Quotas
  • Quotas Troubleshooting
  • File Access Control Lists
  • FACL Troubleshooting
  • SELinux Concepts
  • SELinux Troubleshooting
  • SELinux Troubleshooting Continued

Troubleshooting Group 5

  • Kernel Modules
  • Kernel Modules Troubleshooting
  • Logical Volume Management
  • Creating Logical Volumes
  • LVM Deployment Issues
  • VG Migration, PV Resizing & Troubeshooting
  • Software RAID Overview
  • RAID Troubleshooting
  • LDAP and OpenLDAP
  • Troubleshooting OpenLDAP

Troubleshooting Group 6

  • DNS Concepts
  • DNS Troubleshooting
  • DNS Troubleshooting
  • Apache Concepts
  • Apache Troubleshooting
  • Apache Troubleshooting
  • FTP Concepts
  • FTP Troubleshooting
  • Squid Concepts
  • Squid Troubleshooting

Troubleshooting Group 7

  • Samba Concepts
  • Samba Troubleshooting
  • Postfix Concepts
  • Postfix Troubleshooting
  • Postfix Troubleshooting
  • Sendmail Concepts
  • Sendmail Troubleshooting
  • IMAP & POP Concepts
  • IMAP/POP Troubleshooting
Recommended Prerequisites

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

Training Style

Short lectures sessions combined with extensive hands-on practice (75%).

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Related Courses
Code Course Title Duration Level
LNXADM
Enterprise Linux System Administration
5 Days
I
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LNXNET
Enterprise Linux Networking Services
5 Days
II
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LNXA4UA
Linux System Administration for UNIX Administrators
5 Days
III
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Every student attending a Verhoef Training class will receive a certificate good for $100 toward their next public class taken within a year.

You can also buy "Verhoef Vouchers" to get a discounted rate for a single student in any of our public or web-based classes. Contact your account manager or our sales office for details.

Schedule For This Course
There are currently no public sessions scheduled for this course. We can schedule a private class for your organization just a couple of weeks from now. Or we can let you know the next time we do schedule a public session.
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