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._
Learning Objectives
Successfully complete this lab by achieving the following learning objectives:
- Tasks 1–3
1. Upgrade a Package
On
HostA, upgrade thehttpdpackage to the latest release, and then lock the package.2. Examine Application
On
HostA, review theyaga_appfound in/opt/to see if it has any memory issues. Save the report to/opt/reportsasyaga_memcheck.3. Uncover the Source of CPU Spikes
On
HostD, discover the cause of vast CPU spikes, and resolve the issue.- Tasks 4–6
4. Resolve Remote Logging Issues
HostBis set up to accept remote logging from other servers. Determine why it is not receiving logs fromHostA.5. Resolve Package Manager Problem
When trying to download a new package using
dnfonHostB, 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 thepmcdandpmloggerservices. Determine the cause of the issue, and resolve it.- 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
httpdOn
HostB, determine why thehttpdservice won’t start.- 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
HostDandHostAHostDcannot connect to the Apache server atHostAonhttp://ip-10-0-1-10/index.html. Resolve the issue.12. Resolve Samba Authentication Issues
On
HostC, thecloud_usercannot list available Samba shares. Determine the cause of the issue, and resolve it.Password:
astrongpass13. Discern Used Password
On
HostA, read thepcapfile located at/opt/reports/pcap/packet.pcapto determine the password used bytestuser01. Save the password to/opt/reports/pcap/password.
