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Fix Firefox Secure Connection Failed Due to Antivirus Interference - Ubuntu APT Lock Troubleshooting Checklist-How to Remove SSH Host Keys from known_hosts File

Updated 2026-06-13 13:09:36office-tools
Fix Firefox Secure Connection Failed Due to Antivirus Interference - Ubuntu APT Lock Troubleshooting Checklist-How to Remove SSH Host Keys from known_hosts File
Likely symptom
Likely cause
Safe rollback

Verification route

  • Repeat the original action, not only a simplified test case.
  • Restart the app or reload the service after configuration changes.