zhizhu
Home / developer-tools / How to Remove the Ubuntu dpkg Lock File - Fixing Nginx Permission Denied for Upstream Unix Socket-How to Fix GitHub Actions Permission Denied (publickey) Error

How to Remove the Ubuntu dpkg Lock File - Fixing Nginx Permission Denied for Upstream Unix Socket-How to Fix GitHub Actions Permission Denied (publickey) Error

Updated 2026-06-13 13:10:08developer-tools
How to Remove the Ubuntu dpkg Lock File - Fixing Nginx Permission Denied for Upstream Unix Socket-How to Fix GitHub Actions Permission Denied (publickey) Error
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.