🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026
Affected versions: RHEL 10.0

📖 ~1 min read

Table of contents
  1. Problem Summary
  2. Symptoms
  3. Diagnostics
  4. Root Cause
  5. Primary Fix
  6. Verification
  7. Prevention
  8. Rollback
  9. Automation
  10. Command Reference
  11. Escalation
  12. Related Notes

Problem Summary

A custom unit enters failed state right after startup.

Symptoms

systemctl status shows exit-code and restart loop.

Diagnostics

Use systemctl status and journalctl -u -b.

Root Cause

Wrong dependencies, missing environment file, or path issues.

Primary Fix

Correct Unit directives, run systemctl daemon-reload, then restart service.

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Illustrative mockup for rhel-10 — rhel10-b02-p28-1
Illustrative mockup — Progressive Robot — Illustrative mockup — Progressive Robot

Verification

Confirm Active: active (running) and no fresh errors in journalctl.

Illustrative mockup for rhel-10 — rhel10-b02-p28-2
Illustrative mockup — Progressive Robot — Illustrative mockup — Progressive Robot

Prevention

Validate units with systemd-analyze verify during CI.

Rollback

Revert to previous unit file from /etc/systemd/system backup.

Automation

Use drop-in templates managed by configuration management.

Command Reference

systemctl daemon-reload; systemctl restart ; journalctl -u -n 100

Escalation

Attach unit file and full journal logs when escalating.

SELinux context mismatches on executable paths can also trigger failures.

Related tutorial: View the step-by-step tutorial for rhel-10.

View all rhel-10 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

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