π ~1 min read
Table of contents
Symptom & Impact
Root filesystem fills rapidly and services fail due to low disk space.
Environment & Reproduction
Often caused by verbose logging loops or missing journal size limits.
Root Cause Analysis
Persistent journal retention grows beyond available storage budget.
Quick Triage
Measure journal footprint and identify top noisy units.
Step-by-Step Diagnosis
Inspect journald usage and high-frequency error sources.
Solution – Primary Fix
Vacuum old journals, set retention limits, and resolve noisy service logging.
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Solution – Alternative Approaches
Forward logs to centralized storage and minimize local persistence.
Verification & Acceptance Criteria
Disk pressure is reduced and journal growth remains within policy limits.
Rollback Plan
Restore previous journald config if compliance retention requirements are impacted.
Prevention & Hardening
Apply journal quotas and monitor log growth trends continuously.
Related Errors & Cross-Refs
No space left on device, journal files too large, and service restart storms.
Related tutorial: View the step-by-step tutorial for Ubuntu 20.04 LTS.
View all Ubuntu 20.04 LTS tutorials on the Tutorials Hub β
Browse all common problems & solutions on the Tutorials Hub.
References & Further Reading
systemd-journald retention controls and Ubuntu logging best practices.
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