Complete Linux Troubleshooting Course (Practical Examples)

• Troubleshoot IT and Linux related issues with effective tools and techniques
• Save time when troubleshooting is done with the correct approach
• Manage your company’s IT environment and respond to critical issues smoothly
• Diagnose and Repair Common Networking and Filesystem Errors 

Linux Troubleshooting Course

Section 1 – Introduction and Course Overview

• What is this course about
• Syllabus Overview
• Download Syllabus

Section 2 – Troubleshooting Best Practices

• Follow Policies and Standards
• Documentation or Ticketing Process
• Patience To Work With the Users / Group
• Get Online Help
• Understanding the Issue Before Making a Decision
• Involve Vendor If Needed
• Log Monitor
• Be Honest and Ask Questions

Section 3 – Lab Setup

• What is VirtualBox?
• Installing Oracle VirtualBox
• Creating First Virtual Machine
• Linux Installation

Section 4 – Conceptual Troubleshooting

• Who is Who?
• Cannot Access Server
• Cannot Install Linux
• Linux Virtual Machine Running Slow

Section 5 – System Access Troubleshooting

• Server is Not Reachable
• Cannot Connect to a Website or an Application
• Cannot SSH as root or a Specific User
• Firewall Issue
• Terminal Client is not working
• Cannot Connect using Putty to a VirutalBox VM

Section 6 – FileSystem Troubleshooting

• Cannot cd into a Directory
• Cannot Open a File or Run a Script
• Having Trouble Finding Files and Directories
• Cannot Create Links
• Cannot Write to a File
• Cannot Delete, Copy, Move or Rename a File
• Cannot Change File Permissions or View Other Users Files
• Disk Space Full or Add More Disk Space
• Add Disk and Create Standard Partition
• Add Disk and Create Standard Partition
• Add Disk and Create LVM Partition
• Extend Disk with LVM
• How to Delete Old Files
• FileSystem is Corruption
• Corruption in /etc/fstab
• Script to Delete Old Files
• Handouts

Section 7 – System Administration Troubleshooting

• Running Out of Memory
• Add Swap Space
• System Rebooted or Process Restarted
• Unable to get IP Address
• IP Assigned but not Reachable
• Having Trouble using vi Editor
• Cannot Run Certain Commands
• Cannot Change Password
• User Account has no Home Directory
• How to Change Every Instance of a Word in a File
• How to Use sed Command
• How to Kill a User Terminal or Process
• Recover Root Password
• SOS Report
• List of Users Logged in by Date
• System is Running Slow

Section 8 – System Recovery

• Recover Virtual System
• Recover Physical System
• Disaster Recovery

Section 9 – Additional Resources

• What is FileSystem
• File Ownership Commands (chown, chgrp)
• Files and Directory Permissions (chmod)
• System Logs Monitor (/var/log)
• Soft and Hard Links
• curl and ping commands
• Programs and Service Management
• Processes and Jobs (systemctl, ps, kill, top, crontab, at)
• New Network Commands
• Script to Delete Old Files