Oracle Linux 10 – Common Problem 032 – Diagnosis and Fix

📖 ~1 min read

Table of contents

1. Symptom & Impact
2. Environment & Reproduction
3. Root Cause Analysis
4. Quick Triage
5. Step-by-Step Diagnosis
6. Solution – Primary Fix
7. Solution – Alternative Approaches
8. Verification & Acceptance Criteria
9. Rollback Plan
10. Prevention & Hardening
11. Related Errors & Cross-Refs
12. References & Further Reading

Symptom & Impact

System clock drifts because chronyd never reaches synchronized state.

Environment & Reproduction

timedatectl shows System clock synchronized: no.

Root Cause Analysis

Run chronyc sources -v and systemctl status chronyd.

Quick Triage

NTP sources blocked by firewall or incorrect chrony.conf.

Step-by-Step Diagnosis

Allow UDP/123 in firewalld and set reliable NTP servers.

Solution – Primary Fix

Check chronyc tracking reports low offset and normal stratum.

Solution – Alternative Approaches

Use internal NTP hierarchy and source monitoring.

Verification & Acceptance Criteria

Restore previous chrony.conf from config management baseline.

Rollback Plan

Enforce chrony settings through system role timesync.

Prevention & Hardening

firewall-cmd –add-service=ntp –permanent; systemctl restart chronyd

Related Errors & Cross-Refs

Attach chrony logs and upstream network path checks.

Related tutorial: View the step-by-step tutorial for oracle-linux-10.

View all oracle-linux-10 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

Large VM suspend/resume gaps can require makestep tuning.