Debian 13 Full Disk in /var Causes Package Manager Failures

📖 ~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

apt and logs fail with ENOSPC, causing stalled upgrades and service instability.

Environment & Reproduction

Debian 13 hosts with small /var partitions and high log or cache churn.

Root Cause Analysis

Package cache, journal files, or container layers consumed all available /var capacity.

Quick Triage

Check filesystem usage and identify top consumers under /var.

Step-by-Step Diagnosis

Review apt cache, journal size, and old package artifacts for cleanup candidates.

Solution – Primary Fix

Clean apt cache, rotate journals, and remove stale artifacts before rerunning apt.

Solution – Alternative Approaches

Extend /var filesystem capacity or move heavy application data to separate volumes.

Verification & Acceptance Criteria

Sufficient free space exists and package transactions complete without ENOSPC.

Rollback Plan

Restore archived logs from backup if data retention requirements demand recovery.

Prevention & Hardening

Set filesystem usage alerts and enforce retention policies for logs and caches.

Related Errors & Cross-Refs

Related failures include dpkg write errors and broken package unpack steps.

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

View all Debian 13 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

Debian administration guide and journalctl storage management docs.