Apprentice Level

CompTIA Linux+: Troubleshooting

By Andrew Mallett

When it has all gone wrong, a cool head will help you quickly resolve the issues. This course will teach you how to understand and speedily resolve issues in Linux servers.

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3.26 hours
  • 33 Lessons

About the course

Sometimes IT does not work the way it should and you are going to have to fix it. In this course, CompTIA Linux+: Troubleshooting, you’ll learn to evaluate the current situation and resolve how best to correct issues. First, you’ll explore networking issues and how there are a wealth of hidden tolls available to you. Next, you’ll discover process issues and memory bottlenecks, even creating your own zombie processes. Finally, you’ll learn how to take control of systems to really interrogate the system. When you’re finished with this course, you’ll have the skills and knowledge of Linux troubleshooting needed to successfully troubleshoot and mitigate issues on your systems.

Recommended order of completion:

  • Introduction to the CompTIA Linux+ (XK0-005) Certification
  • CompTIA Linux+: System Management
  • CompTIA Linux+: Security
  • CompTIA Linux+: Scripting, Containers, and Automation
  • CompTIA Linux+: Troubleshooting
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  • Chapter 1 8 Lessons Troubleshooting Networks 43:46

    Welcome to Troubleshooting

    5:17

    Dropped Packets on Network Interface Card (NIC)

    3:53

    Measuring Bandwidth

    5:58

    Working with Domain Name System (DNS) and Resolvectl

    8:58

    Understanding Tools to Test Network Access

    3:43

    Testing Access to the Network

    7:17

    Testing Firewalls Issues

    6:55

    Summary and What's Next

    1:45
  • Chapter 2 7 Lessons Troubleshooting Memory and CPU Issues 49:52

    Installing Sysstat

    6:57

    Understanding Uptime

    8:52

    Working with Sar and Mpstat

    10:42

    Understanding Zombie Processes

    6:38

    Troubleshooting Memory and OOM

    4:35

    Troubleshooting SWAP Memory

    8:18

    Summary

    3:50
  • Chapter 3 5 Lessons Troubleshoot Storage Issues 28:37

    Testing IOPS with Loping

    7:26

    Reading Disk Performance with Sar

    5:22

    Disk Defragmentation

    6:04

    Configuring Mount Options

    6:42

    Summary and What's Next

    3:03
  • Chapter 4 10 Lessons Troubleshoot User Access 58:12

    Welcome to Troubleshooting User Access

    4:09

    Installing Quota Systems

    6:16

    Understanding How Quotas Are Configured

    3:13

    Configuring User Quotas

    11:14

    Diagnose Login Issues

    8:23

    Understanding Default Password Complexity

    3:40

    Configuring Password Complexity

    10:49

    Troubleshooting User Access

    2:31

    Troubleshooting Sudo

    4:47

    Summary and What's Next

    3:10
  • Chapter 5 3 Lessons Diagnose Issues Using Systemd 14:42

    Analyzing System Startup

    4:32

    Understanding Service Units

    7:39

    Summary

    2:31

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