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Fix SSH Host Key Verification Failed on Linux - Resolve MySQL Access Denied for root@localhost-Windows Defender 502 Bad Gateway Troubleshooting Guide

2026-06-13 12:34:54office-tools
Fix SSH Host Key Verification Failed on Linux - Resolve MySQL Access Denied for root@localhost-Windows Defender 502 Bad Gateway Troubleshooting Guide

Final checklist

  • Confirm that the same symptom is gone after a restart or refresh.
  • Keep the smallest working change and undo temporary diagnostic settings.