Oracle Linux System Administration II — Lesson 3: Networking, DNS, NFS, SSH, Time, and Service Configuration

Technical Scope

• NetworkManager connections, addresses, routes, bonding, and troubleshooting
• DNS client and server concepts, hostname resolution, and diagnostics
• NFS exports and mounts, autofs, permissions, and availability
• OpenSSH configuration, keys, forwarding controls, chrony, and service security

Instructor Demonstration

Demonstrate NetworkManager connections, addresses, routes, bonding, and troubleshooting within a production Oracle Linux server prepared for application hosting with resilient storage, controlled services, secure access, observable performance, and documented recovery, then capture the exact configuration, command, transaction, report, trace, or code evidence that proves the expected result.

Applied Workshop

Implement a controlled workshop covering DNS client and server concepts, hostname resolution, and diagnostics and NFS exports and mounts, autofs, permissions, and availability, then test a failure, exception, or business-control scenario involving OpenSSH configuration, keys, forwarding controls, chrony, and service security.

1. Confirm the environment, identities, data, dependencies, controls, and expected result.
2. Complete the product-specific configuration, development, analysis, or business-process task.
3. Capture commands, configuration, output, logs, transactions, reports, or test evidence.
4. Explain the operational, security, performance, data-quality, or business trade-off.

Validation Standard

The Networking, DNS, NFS, SSH, Time, and Service Configuration result must be reproducible, traceable to approved inputs, and consistent with expected Oracle product or business-process behavior.

• The intended target, scope, and ownership are verified.
• The result is supported by reproducible evidence and expected-value checks.
• Security, performance, reliability, data quality, and support impact are reviewed.
• Unexpected behavior is investigated before acceptance or release.

Failure Analysis

Diagnose issues in NetworkManager connections, addresses, routes, bonding, and troubleshooting, DNS client and server concepts, hostname resolution, and diagnostics, NFS exports and mounts, autofs, permissions, and availability, or OpenSSH configuration, keys, forwarding controls, chrony, and service security without making an unverified production change.

Learners isolate the smallest proven cause, apply a reversible correction, rerun validation, and record the preventive action.

Practical Outcome

Complete a validated implementation or analysis for Networking, DNS, NFS, SSH, Time, and Service Configuration and defend the result with documented evidence.