RHEL 7 – yum-cron Service Not Applying Scheduled Security Updates

📖 ~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

Security patches remain unapplied between maintenance windows, increasing exposure duration.

Environment & Reproduction

Found where yum-cron is installed but service is disabled or misconfigured.

Root Cause Analysis

Automatic update job cannot execute due to disabled service, repo errors, or proxy issues.

Quick Triage

Check systemctl status yum-cron and inspect journalctl for scheduled run failures.

Step-by-Step Diagnosis

Review /etc/yum/yum-cron.conf and ensure update command and notification settings are valid.

Solution – Primary Fix

Enable and start yum-cron service, correct configuration, and test run manually.

Solution – Alternative Approaches

Use centrally orchestrated yum update jobs if local automation is restricted.

Verification & Acceptance Criteria

Scheduled jobs execute and relevant security advisories are installed automatically.

Rollback Plan

Disable yum-cron if policy requires strictly manual patch windows.

Prevention & Hardening

Monitor last successful run and alert on stale patch status.

Related Errors & Cross-Refs

yum-cron not running, metadata download failure, no packages marked for update.

Related tutorial: View the step-by-step tutorial for rhel-7.

View all rhel-7 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

RHEL 7 yum-cron scheduling and automated patching guidance.