Affected versions: Ubuntu 18.04 LTS Ubuntu 18.04 Ubuntu 18.04.6

πŸ“– ~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

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.

Illustrative mockup for ubuntu-18-04-lts β€” terminal_or_console
Diagnosis commands for post 174 β€” Illustrative mockup β€” Progressive Robot

Solution – Primary Fix

Use appropriate nofail/timeouts and network-online dependencies for NFS mounts.

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Illustrative mockup for ubuntu-18-04-lts β€” log_or_dashboard
Fix validation evidence for post 174 β€” Illustrative mockup β€” Progressive Robot

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.

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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