📖 ~1 min read
Table of contents
Symptom & Impact
`service start` fails silently or exits non-zero, leaving dependent workloads unavailable.
Environment & Reproduction
Occurs on migrated RHEL 6 workloads where SysV scripts lack proper headers or permissions in RHEL 7.
Root Cause Analysis
Init script is non-compliant, missing chkconfig metadata, or incompatible with systemd compatibility wrapper.
Quick Triage
Run `service status`, `systemctl status `, and inspect script shebang, execute bits, and runlevel headers.
Step-by-Step Diagnosis
Validate script logic manually, check return codes, and review `journalctl -xe` for wrapper-level failures.
Solution – Primary Fix
Correct SysV script metadata and logic or replace with native systemd unit for reliable service lifecycle control.
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Solution – Alternative Approaches
Create dedicated systemd service file wrapping legacy commands and retire direct `service` usage in automation.
Verification & Acceptance Criteria
Start, stop, and restart work with both `systemctl` and expected runlevel behavior after reboot.
Rollback Plan
Reinstate old script from backup and disable new unit if compatibility changes impact production behavior.
Prevention & Hardening
Standardize on native systemd service definitions and audit hosts for deprecated init scripts.
Related Errors & Cross-Refs
`chkconfig –list && systemctl enable && journalctl -u -n 60`
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 systemd migration documentation and best practices for legacy service modernization.
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