RHEL 7 service crond Not Starting at Boot

📖 ~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

Scheduled jobs do not run after reboot, causing missed backups and maintenance tasks. systemctl and service checks reveal crond inactive or failed state.

Environment & Reproduction

Seen on RHEL 7 hosts after hardening changes, package updates via yum, or disabled boot targets. firewalld and SELinux may influence dependent job actions.

Root Cause Analysis

Common causes include disabled unit, dependency failure, malformed config, or permission/context issues. journalctl often shows the first failing condition during boot.

Quick Triage

Run systemctl is-enabled crond, systemctl status crond, service crond status, and inspect journalctl -u crond. Verify SELinux denials and relevant firewalld exposure.

Step-by-Step Diagnosis

Inspect unit dependencies, validate crontab and spool permissions, and check if yum updates changed service files. Confirm policy and context correctness under SELinux.

Solution – Primary Fix

Enable crond at boot, correct configuration, restore labels, and restart with systemctl. Validate scheduled execution and ensure supporting network/firewall dependencies are available.

Solution – Alternative Approaches

Move critical schedules to systemd timers, centralize job orchestration, or implement external scheduler failover for essential tasks.

Verification & Acceptance Criteria

After reboot, crond is active and jobs execute on schedule. journalctl shows no startup errors and dependent service tasks complete successfully.

Rollback Plan

Restore previous cron configs and unit files from backup. Revert recent yum package changes and security policies if newly introduced issues appear.

Prevention & Hardening

Audit boot-enabled services regularly, test restart behavior in staging, and monitor scheduler health via journalctl-based alerts and systemctl probes.

Related Errors & Cross-Refs

Related failures include anacron conflicts and permission denied on spool files. See linked tutorial 9061 for reliable scheduling setup.

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

See man systemctl, man service, man crond, man yum, man journalctl, man firewall-cmd, and SELinux cron policy documentation.