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Red Hat Certified Specialist in Linux Diagnostics and Troubleshooting Exam Prep (RH342 )

Video Introducing this tutorial


Introduction:
About the Author
About this Course
The Exam

Understand and employ general methods for troubleshooting:
Get into a troubleshooting mindset
Collect system information to aid in troubleshooting
Consult documentation resources to aid in troubleshooting
Monitor systems for vital characteristics
Configure systems to send log messages to a centralized host

Diagnose and troubleshoot system start up issues:
Identify and resolve service failures affecting boot
Regain root control of a system
Troubleshoot boot issues
Identify hardware and hardware problems
Manage kernel modules and their parameters

Diagnose and troubleshoot file system issues:
Recover corrupted file systems
Recover mis-configured or broken LVM configurations
Recover data from encrypted file systems
Identify and fix iSCSI issues

Resolve package management issues:
Resolve package management dependency issues
Recover a corrupted RPM database
Identify and restore changed files

Troubleshoot and fix network connectivity issues:
Use standard tools to verify network connectivity
Identify and fix network connectivity issues
Inspect network traffic to aid troubleshooting

Diagnose application issues:
Identify library dependencies for third-party software
Identify if an application suffers from memory leaks
Use standard tools to debug an application
Identify and fix issues related to SELinux

Identify and fix authentication issues:
Identify and fix pluggable authentication module (PAM) issues
Identify and fix LDAP and Kerberos identity management issues

Gather information to aid third party investigation of issues:
Create kernel crashdumps
Compile and execute SystemTap modules
Sosreports

Next Steps:
Conclusion and Review
What's Next