Red Hat Certified Specialist in Linux Diagnostics and Troubleshooting Guide



This Exam is all about being able to find and fix faults on RHEL7(.5)

This page lists some of the posts I have written to understand the objectives required.


Exam Prediction:

My predictions for what is on the exam are here


Top Posts:

Below are my top posts whilst studying for the EX342 Troubleshooting Exam:


Exam Objectives:

  • Understand and employ general methods for troubleshooting
  • 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
  • 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
  • Gather information to aid third party investigation of issues
    • Create kernel crashdumps
    • Compile and execute SystemTap modules