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Red Hat Certified Specialist in Linux Diagnostics and Troubleshooting (EX342) Exam

The Red Hat Certified Specialist in Linux Diagnostics and Troubleshooting exam tests on a person's ability to resolve issues with broken systems at various levels of the system. This includes system startup, file and package management, authentication, networking, and the ability to leverage system tools to gather data about each of these topics. In this hands-on practice exam, we'll practice diagnosing and troubleshooting four provided servers with a myriad of problems. _This practice exam is not approved or sponsored by Red Hat._

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Path Info

Level
Clock icon Intermediate
Duration
Clock icon 3h 45m
Published
Clock icon Aug 19, 2022

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Table of Contents

  1. Challenge

    Tasks 1–3

    1. Upgrade a Package

    On HostA, upgrade the httpd package to the latest release, and then lock the package.

    2. Examine Application

    On HostA, review the yaga_app found in /opt/ to see if it has any memory issues. Save the report to /opt/reports as yaga_memcheck.

    3. Uncover the Source of CPU Spikes

    On HostD, discover the cause of vast CPU spikes, and resolve the issue.

  2. Challenge

    Tasks 4–6

    4. Resolve Remote Logging Issues

    HostB is set up to accept remote logging from other servers. Determine why it is not receiving logs from HostA.

    5. Resolve Package Manager Problem

    When trying to download a new package using dnf on HostB, the download fails. Determine the cause of the issue, and resolve it.

    6. Determine the Issue with Performance Co-Pilot

    On HostB, attempt to start the pmcd and pmlogger services. Determine the cause of the issue, and resolve it.

  3. Challenge

    Tasks 7–9

    7. Repair Corrupted File System

    On HostC, attempt to mount and access /images. Recover the file system.

    8. Restore to an LVM Archive and Recover Encrypted Data

    On HostD, attempt to mount /data. Locate a working archive of the setup, and restore to that archive. A backup is located in /opt/backups.

    9. Troubleshoot httpd

    On HostB, determine why the httpd service won't start.

  4. Challenge

    Tasks 10–13

    10. Enable Crash Dumps

    On HostA, enable kernel crash dumps. Ensure all dumps are sent to /opt/reports/.

    11. Resolve Communication between HostD and HostA

    HostD cannot connect to the Apache server at HostA on http://ip-10-0-1-10/index.html. Resolve the issue.

    12. Resolve Samba Authentication Issues

    On HostC, the cloud_user cannot list available Samba shares. Determine the cause of the issue, and resolve it.

    Password: astrongpass

    13. Discern Used Password

    On HostA, read the pcap file located at /opt/reports/pcap/packet.pcap to determine the password used by testuser01. Save the password to /opt/reports/pcap/password.

A Cloud Guru - Labs - Red Hat Certified Specialist in Linux Diagnostics and Troubleshooting (EX342) Exam
Author
A Cloud Guru

The Cloud Content team comprises subject matter experts hyper focused on services offered by the leading cloud vendors (AWS, GCP, and Azure), as well as cloud-related technologies such as Linux and DevOps. The team is thrilled to share their knowledge to help you build modern tech solutions from the ground up, secure and optimize your environments, and so much more!

What's a lab?

Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.

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We will provide the credentials and environment necessary for you to practice right within your browser.

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Follow along with the author’s guided walkthrough and build something new in your provided environment!

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