🟡 Medium   ⏱ 5–30 min  Last verified: 20 May 2026
Affected versions: Oracle Linux 10

📖 ~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

Unexpected package updates restart services during production hours.

Environment & Reproduction

Occurs when automatic update timers are enabled without maintenance windows.

systemctl list-timers | grep dnf
cat /etc/dnf/automatic.conf
journalctl -u dnf-automatic -n 60

Root Cause Analysis

Auto apply settings and timer schedules are too broad for service critical hosts.

Quick Triage

Confirm timer state and recent package transaction times.

systemctl status dnf-automatic.timer
dnf history list | head

Step-by-Step Diagnosis

Map update timing to service restart events.

journalctl --since yesterday | grep -E 'dnf|Updated|Started|Stopped'
systemctl cat dnf-automatic.timer
Illustrative mockup for oracle-linux-10 — terminal_or_shell
dnf automatic policy diagnostics — Illustrative mockup — Progressive Robot

Solution – Primary Fix

Disable automatic apply on critical hosts and enforce controlled maintenance windows.

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sed -i 's/^apply_updates =.*/apply_updates = no/' /etc/dnf/automatic.conf
systemctl disable --now dnf-automatic.timer
Illustrative mockup for oracle-linux-10 — logs_or_journal
service restart evidence after updates — Illustrative mockup — Progressive Robot

Solution – Alternative Approaches

Keep automatic download but require manual install approval.

sed -i 's/^download_updates =.*/download_updates = yes/' /etc/dnf/automatic.conf

Verification & Acceptance Criteria

No unscheduled update actions occur and service uptime remains stable.

systemctl is-enabled dnf-automatic.timer
journalctl -u dnf-automatic --since '24 hours ago'

Rollback Plan

Re-enable timer if patch emergency policy requires immediate automation.

systemctl enable --now dnf-automatic.timer

Prevention & Hardening

Define environment specific update windows and notification workflows.

crontab -l
cat /etc/dnf/automatic.conf

Related to maintenance window violations and transaction lock collisions.

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

Oracle Linux automatic update and patch governance references.

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