RH354 – Red Hat Enterprise Linux 8 New Features for Experienced Linux Administrators — Lesson 4: Performance, Troubleshooting, Compatibility, Migration, and Updated Operations

Learning Objectives

• Operate, troubleshoot, document, and improve performance, troubleshooting, and compatibility.
• Apply migration planning and updated operations while preserving reviewable technical evidence.
• Recognize and correct the risk where the technical fix is successful but monitoring, rollback, ownership, or handover remains incomplete.

Detailed Topics

• performance: apply the concept to an experienced Linux administrator updating operational practices for an RHEL 8 estate, record the relevant settings or decisions, and explain the operational consequence.
• troubleshooting: apply the concept to an experienced Linux administrator updating operational practices for an RHEL 8 estate, record the relevant settings or decisions, and explain the operational consequence.
• compatibility: apply the concept to an experienced Linux administrator updating operational practices for an RHEL 8 estate, record the relevant settings or decisions, and explain the operational consequence.
• migration planning: apply the concept to an experienced Linux administrator updating operational practices for an RHEL 8 estate, record the relevant settings or decisions, and explain the operational consequence.
• updated operations: apply the concept to an experienced Linux administrator updating operational practices for an RHEL 8 estate, record the relevant settings or decisions, and explain the operational consequence.

Instructor Demonstration

The instructor demonstrates performance, troubleshooting, compatibility, migration, and updated operations by tracing the relevant architecture, commands, configuration, messages, and evidence. The walkthrough highlights how the technical fix is successful but monitoring, rollback, ownership, or handover remains incomplete and shows how to isolate the cause without masking dependent issues.

Hands-On Exercise

Run an operational review and produce support-ready evidence for Performance, Troubleshooting, Compatibility, Migration, and Updated Operations. Add verified outcomes to the RHEL 8 feature comparison, updated administration procedures, compatibility checklist, and adoption plan.

1. Confirm the scope, versions, access, dependencies, and success criteria.
2. Perform the workflow while recording commands, settings, output, and platform events.
3. Test one expected case and one controlled exception specific to this lesson.
4. Retest the correction and document ownership, rollback, and follow-up actions.

Scenario Analysis

• Identify which dependency most strongly influences performance in the stated scenario.
• Compare two approaches for migration planning and explain the security, reliability, and support trade-offs.
• Decide what evidence must be retained in the RHEL 8 feature comparison, updated administration procedures, compatibility checklist, and adoption plan before operational acceptance.

Troubleshooting Guidance

Begin with the first observable difference from the expected result. Check monitoring, troubleshooting, rollback, ownership, and handover separately, then correlate logs, events, commands, and configuration history. Do not accept the initial assumption that the technical fix is successful but monitoring, rollback, ownership, or handover remains incomplete; confirm the cause with a reproducible retest.

Validation Checklist

• The required monitoring, troubleshooting, rollback, ownership, and handover were checked and recorded.
• The normal path and a course-specific exception were tested.
• The RHEL 8 feature comparison, updated administration procedures, compatibility checklist, and adoption plan links conclusions to commands, configuration, logs, or other objective evidence.
• Corrective actions, rollback steps, ownership, and handover notes are complete.

Lesson Outcome

Learners can apply Performance, Troubleshooting, Compatibility, Migration, and Updated Operations, explain the observed Red Hat platform behavior, and support the result with a reviewable RHEL 8 feature comparison, updated administration procedures, compatibility checklist, and adoption plan.