π ~1 min read
Table of contents
Symptom & Impact
Commands print locale warnings and scripts may parse output incorrectly.
Environment & Reproduction
Appears after image migration or environment variable edits.
Root Cause Analysis
LANG/LC_* point to locales not generated on system.
Quick Triage
Run locale and locale -a to identify missing target locale.
Step-by-Step Diagnosis
Trace locale variables from profile files and service environments.

Solution – Primary Fix
Generate required locale and update default locale configuration.
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Solution – Alternative Approaches
Temporarily set C locale for deterministic script behavior.
Verification & Acceptance Criteria
No locale warnings and expected UTF-8 behavior confirmed.
Rollback Plan
Revert locale env file changes if user session issues appear.
Prevention & Hardening
Standardize locale settings in base image provisioning.
Related Errors & Cross-Refs
perl: warning: Setting locale failed and cannot set LC_ALL.
Related tutorial: View the step-by-step tutorial for Ubuntu 14.04 LTS.
View all Ubuntu 14.04 LTS tutorials on the Tutorials Hub β
Browse all common problems & solutions on the Tutorials Hub.
References & Further Reading
Ubuntu locale generation and environment variable docs.
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