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Objectives

• Know the different forms system rescue media come in
• Know how to enter into emergency mode
• Know how to enter single user mode, what can be done there and how it differs from emergency mode

Emergency Boot Media

The are linux images that comes handy when there is a problem booting the current system due to misconfigurations or any other error.

They came in these flavors

Objectives

• Troubleshoot linux systems following a number of steps iteratively until solutions are found
• Check network and file integrity for possible issues
• Resolve problems when there is system boot failure
• Repair and recover corrupted filesystems
• Understand how rescue and recovery media can be used for troubleshooting

Troubleshooting Overview

• Beginner
• Experienced
• Wizard

Basic Techniques

• Characterize the problem
• Reproduce the problem