Permission Denied on Web Root After Deployment

📖 ~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

Web server returns forbidden or file access errors after code deployment.

Environment & Reproduction

Ubuntu 18.04 with Apache or Nginx serving files copied by privileged deployment process.

Root Cause Analysis

Ownership, permissions, or ACL settings do not allow web service account to read content.

Quick Triage

Check file ownership and directory execute bits along full document root path.

Step-by-Step Diagnosis

Inspect permissions recursively and correlate with web server error logs.

Solution – Primary Fix

Apply correct owner/group and least-privilege modes for files and directories.

Solution – Alternative Approaches

Use deployment user/group strategy with controlled ACLs for shared write paths.

Verification & Acceptance Criteria

Application loads normally and no permission errors appear in server logs.

Rollback Plan

Revert to prior permission baseline if new policy breaks application writes.

Prevention & Hardening

Enforce permission standards in deployment automation and periodic compliance checks.

Related Errors & Cross-Refs

403 Forbidden, AH00035 access denied, and Nginx open() failed permission denied.

Related tutorial: View the step-by-step tutorial for Ubuntu 18.04 LTS.

View all Ubuntu 18.04 LTS tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

Linux file permission model and web server hardening guides for Ubuntu.