Description

Linux Troubleshooting and Administration

Explore the key tips and techniques for maintaining a reliable and highly available Linux server infrastructure and reducing downtime with this interactive course. Beginning with troubleshooting best practices, you'll go on to understand the technique of effectively diagnosing and fixing common and complex Linux server configuration and administration issues. From system access troubleshooting through to filesystem troubleshooting, you'll learn with practical examples and tackle a variety of critical issues. Later, you'll even get to grips with system recovery. All along, this course will guide you on how to apply your skills in a production environment. By the end of this course, you will have developed the skills you need to effectively troubleshoot a variety of Linux-related issues. All code and supporting files for this course are available at - https://github.com/PacktPublishing/Linux-Troubleshooting-Course-with-Real-Life-Examples

What You Will Learn

Understand conceptual troubleshooting and system access troubleshooting
Get up to speed with filesystem troubleshooting
Discover system administration troubleshooting and recovery
Manage your company s IT environment and respond to critical issues smoothly

Audience

This course is for beginners in the IT field who are looking to troubleshoot daily issues, and experienced system administrators or engineers who want to improve their existing skills. Basic knowledge of the Linux command line is required.

Approach

The course offers comprehensive insights into every topic with relevant examples to help you gain a practical understanding.

Key Features

Troubleshoot IT and Linux-related issues with effective tools and techniques * Diagnose and repair common networking and filesystem errors

Github Repo

https://github.com/packtpublishing/linux-troubleshooting-course-with-real-life-examples

About the Author

Imran Afzal

Imran Afzal is a systems engineer/manager, entrepreneur, instructor, and a public speaker. He started his career with Time Warner in 2000 as a systems administrator. He was involved in deploying technologies such as DTV, VOD, CableCards, and others. These technologies were built on many Linux distributions. Since then, he has utilized Linux/Unix skills in many Fortune 500 companies. He has worn many different hats and currently manages a large team of systems engineers, administrators and team leads globally. He has spearheaded projects such as datacenter migration, introduction, and deployment of VMware, monitoring tools implementation, Amazon cloud migration, and many more. He is certified in Linux Systems Management, UNIX Operating Systems, Linux System Administration, System Internals, VMWare Certified Professional, RHCSA, and Windows Server Certified.

Course Outline

1. Introduction and Course Overview

In this section, the author provides an overview of the course and topics covered.

1. (Free Preview): Syllabus Overview

Introduction and Course Overview: Syllabus Overview

2. Troubleshooting Best Practices

In this section, you will be able to troubleshoot Best Practices.

1. Welcome to Troubleshooting Best Practices

Troubleshooting Best Practices: Welcome to Troubleshooting Best Practices

2. Follow Policies and Standards

Troubleshooting Best Practices: Follow Policies and Standards

3. Documentation or Ticketing Process

Troubleshooting Best Practices: Documentation or Ticketing Process

4. (Free Preview): Patience To Work With the Users / Group

Troubleshooting Best Practices: Patience To Work With the Users / Group

5. (Free Preview): Get Online Help

Troubleshooting Best Practices: Get Online Help

6. Understanding the Issue Before Making a Decision

Troubleshooting Best Practices: Understanding the Issue Before Making a Decision

7. Involve Vendor If Needed

Troubleshooting Best Practices: Involve Vendor If Needed

8. Log Monitor

Troubleshooting Best Practices: Log Monitor

9. Be Honest and Ask Questions

Troubleshooting Best Practices: Be Honest and Ask Questions

3. Lab Setup

In this section, you will be setting up the Lab/ Environment.

1. Welcome to Lab Setup

Lab Setup: Welcome to Lab Setup

2. What is Virtual Box?

Lab Setup: What is Virtual Box?

3. Installing Oracle VirtualBox

Lab Setup: Installing Oracle VirtualBox

4. Creating First Virtual Machine

Lab Setup: Creating First Virtual Machine

5. Linux Installation

Lab Setup: Linux Installation

4. Conceptual Troubleshooting

In this section, we look into advance topics about Troubleshooting.

1. Welcome to Conceptual Troubleshooting

Conceptual Troubleshooting: Welcome to Conceptual Troubleshooting

2. Who is Who?

Conceptual Troubleshooting: Who is Who?

3. Cannot Access Server

Conceptual Troubleshooting: Cannot Access Server

4. Cannot Install Linux

Conceptual Troubleshooting: Cannot Install Linux

5. Linux Virtual Machine Running Slow

Conceptual Troubleshooting: Linux Virtual Machine Running Slow

5. System Access Troubleshooting

In this section, we look into System Access Troubleshooting.

1. Welcome to System Access Troubleshooting

System Access Troubleshooting: Welcome to System Access Troubleshooting

2. Server is Not Reachable

System Access Troubleshooting: Server is Not Reachable

3. Cannot Connect to a Website or an Application

System Access Troubleshooting: Cannot Connect to a Website or an Application

4. Cannot SSH as root or a Specific User

System Access Troubleshooting: Cannot SSH as root or a Specific User

5. Firewall Issue

System Access Troubleshooting: Firewall Issue

6. Terminal Client is not working

System Access Troubleshooting: Terminal Client is not working

7. Cannot Connect using Putty to a VirutalBox VM

System Access Troubleshooting: Cannot Connect using Putty to a VirutalBox VM

6. FileSystem Troubleshooting

In this section, we learn about FileSystem Troubleshooting.

1. Welcome to FileSystem Troubleshooting

FileSystem Troubleshooting: Welcome to FileSystem Troubleshooting

2. Cannot cd into a Directory

FileSystem Troubleshooting: Cannot cd into a Directory

3. Cannot Open a File or Run a Script

FileSystem Troubleshooting: Cannot Open a File or Run a Script

4. Having Trouble Finding Files and Directories

FileSystem Troubleshooting: Having Trouble Finding Files and Directories

5. Cannot Create Links

FileSystem Troubleshooting: Cannot Create Links

6. Cannot Write to a File

FileSystem Troubleshooting: Cannot Write to a File

7. Cannot Delete, Copy, Move or Rename a File

FileSystem Troubleshooting: Cannot Delete, Copy, Move or Rename a File

8. Cannot Change File Permissions or View Other Users Files

FileSystem Troubleshooting: Cannot Change File Permissions or View Other Users Files

9. Disk Space Full or Add More Disk Space

FileSystem Troubleshooting: Disk Space Full or Add More Disk Space

10. Add Disk and Create Standard Partition

FileSystem Troubleshooting: Add Disk and Create Standard Partition

11. Add Disk and Create LVM Partition

FileSystem Troubleshooting: Add Disk and Create LVM Partition

12. Extend Disk with LVM

FileSystem Troubleshooting: Extend Disk with LVM

13. How to Delete Old Files

FileSystem Troubleshooting: How to Delete Old Files

14. Script to Delete Old Files

FileSystem Troubleshooting: Script to Delete Old Files

15. FileSystem is Corruption

FileSystem Troubleshooting: FileSystem is Corruption

16. Corruption in /etc/fstab

FileSystem Troubleshooting: Corruption in /etc/fstab

7. System Administration Troubleshooting

In this section, we learn about System Administration Troubleshooting.

1. Welcome to System Administration Troubleshooting

System Administration Troubleshooting: Welcome to System Administration Troubleshooting

2. Running Out of Memory

System Administration Troubleshooting: Running Out of Memory

3. Add Swap Space

System Administration Troubleshooting: Add Swap Space

4. System Rebooted or Process Restarted

System Administration Troubleshooting: System Rebooted or Process Restarted

5. Unable to get IP Address

System Administration Troubleshooting: Unable to get IP Address

6. IP Assigned but not Reachable

System Administration Troubleshooting: IP Assigned but not Reachable

7. Having Trouble using vi Editor

System Administration Troubleshooting: Having Trouble using vi Editor

8. Cannot Run Certain Commands

System Administration Troubleshooting: Cannot Run Certain Commands

9. Cannot Change Password

System Administration Troubleshooting: Cannot Change Password

10. User Account has no Home Directory

System Administration Troubleshooting: User Account has no Home Directory

11. How to Change Every Instance of a Word in a File

System Administration Troubleshooting: How to Change Every Instance of a Word in a File

12. How to Use sed Command

System Administration Troubleshooting: How to Use sed Command

13. How to Kill a User Terminal or Process

System Administration Troubleshooting: How to Kill a User Terminal or Process

14. Recover Root Password

System Administration Troubleshooting: Recover Root Password

15. SOS Report

System Administration Troubleshooting: SOS Report

16. List of Users Logged in by Date

System Administration Troubleshooting: List of Users Logged in by Date

17. System is Running Slow

System Administration Troubleshooting: System is Running Slow

18. Rollback Updates and Patching

System Administration Troubleshooting: Rollback Updates and Patching

8. System Recovery

In this section, we learn about System Recovery.

1. Welcome to System Recovery

System Recovery: Welcome to System Recovery

2. Recover Virtual System

System Recovery: Recover Virtual System

3. Recover Physical System

System Recovery: Recover Physical System

4. Disaster Recovery

System Recovery: Disaster Recovery

9. Additional Resources

In this section, we learn about Additional Resources.

1. Welcome to Additional Resources

Additional Resources: Welcome to Additional Resources

2. Introduction to FileSystem

Additional Resources: Introduction to FileSystem

3. File Ownership Commands (chown, chgrp)

Additional Resources: File Ownership Commands (chown, chgrp)

4. Files and Directory Permissions (chmod)

Additional Resources: Files and Directory Permissions (chmod)

5. System Logs Monitor (/var/log)

Additional Resources: System Logs Monitor (/var/log)

6. Soft and Hard Links

Additional Resources: Soft and Hard Links

7. curl and ping commands

Additional Resources: curl and ping commands

8. Programs and Service Management

Additional Resources: Programs and Service Management

9. Processes and Jobs (systemctl, ps, kill, top, crontab, at)

Additional Resources: Processes and Jobs (systemctl, ps, kill, top, crontab, at)

10. New Network Command

Additional Resources: New Network Command

11. Difference Between CentOS/Redhat 5, 6 and 7

Additional Resources: Difference Between CentOS/Redhat 5, 6 and 7

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Linux Troubleshooting Course with Real Life Examples

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