π ~1 min read
Table of contents
Symptom & Impact
Boot is delayed or blocked while waiting for unavailable NFS shares.
Environment & Reproduction
Common when remote NFS server is slow, unreachable, or mount options are strict.
Root Cause Analysis
Hard NFS mount dependencies in fstab stall boot target until timeout.
Quick Triage
Confirm NFS server availability and identify blocking mount units.
Step-by-Step Diagnosis
Analyze mount options, network readiness, and systemd ordering constraints.
Solution – Primary Fix
Use appropriate nofail/timeouts and network-online dependencies for NFS mounts.
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Solution – Alternative Approaches
Mount NFS on-demand with automount units instead of blocking boot sequence.
Verification & Acceptance Criteria
Boot time normalizes and NFS shares mount reliably when network is available.
Rollback Plan
Restore prior mount definitions if application behavior depends on old semantics.
Prevention & Hardening
Classify remote mounts by criticality and enforce resilient mount policies.
Related Errors & Cross-Refs
A start job is running for remote file systems and NFS timeout errors.
Related tutorial: View the step-by-step tutorial for Ubuntu 18.04 LTS.
View all Ubuntu 18.04 LTS tutorials on the Tutorials Hub β
Browse all common problems & solutions on the Tutorials Hub.
References & Further Reading
NFS client mount tuning and systemd automount best practices.
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