Debian 10 – rsync backup job fails with permission denied on target – Fix & Prevention

📖 ~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

Backups fail, leaving restore points stale or missing.

Environment & Reproduction

Triggered by permission drift on remote or mounted backup target.

Root Cause Analysis

Rsync execution user lacks write rights to destination paths.

Quick Triage

Validate backup user identity and destination ACL ownership.

Step-by-Step Diagnosis

Run dry-run rsync with verbose logging and inspect denied paths.

Solution – Primary Fix

Correct destination ownership/ACLs and rerun full backup job.

Solution – Alternative Approaches

Use dedicated backup service account with scoped permissions.

Verification & Acceptance Criteria

Backup completes with zero permission errors and expected file counts.

Rollback Plan

Revert ACL changes if security policy violations are detected.

Prevention & Hardening

Audit backup target permissions and alert on failed jobs.

Related Errors & Cross-Refs

Related to stale NFS mounts and uid/gid mapping inconsistencies.

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

View all debian-10 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

rsync ACL handling and Linux permissions documentation.