🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026
Affected versions: FreeBSD 13

📖 ~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

FreeBSD services rely on rc.conf values, but syntax mistakes or duplicate entries can prevent expected behavior.

Environment & Reproduction

After reboot, services start with old flags or fail despite recently edited rc.conf values.

Root Cause Analysis

Incorrect quoting, overwritten values, and edits in the wrong file are the most common causes.

Quick Triage

Check effective values with sysrc -a | grep _enable and inspect all rc.conf include files for duplicates.

Step-by-Step Diagnosis

Record existing variables and confirm active service scripts. image_ref=0

Illustrative mockup for freebsd-13 — terminal_or_shell
Inspecting service variables with sysrc on FreeBSD 13 — Illustrative mockup — Progressive Robot

Solution – Primary Fix

Use sysrc to set keys atomically, remove duplicate assignments, and restart affected services to apply flags. image_ref=1

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Illustrative mockup for freebsd-13 — log_or_config
Comparing /etc/rc.conf and /etc/rc.conf.local — Illustrative mockup — Progressive Robot

Solution – Alternative Approaches

Use service rcvar to confirm required variables and service restart to reload startup flags.

Verification & Acceptance Criteria

Keep persistent service settings in /etc/rc.conf and avoid ad hoc manual edits from multiple automation tools.

Rollback Plan

For network daemons, verify pf rules and interface assignments if service starts but remains unreachable.

Prevention & Hardening

Reboot a maintenance window host and verify service onestatus plus expected runtime options via ps.

Standardize changes through sysrc in scripts and lint rc.conf updates during deployment.

Related tutorial: View the step-by-step tutorial for freebsd-13.

View all freebsd-13 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

Review man rc.conf, man sysrc, and the rc scripting chapter in the FreeBSD Handbook.

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