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Ubuntu APT Lock Troubleshooting Checklist - Troubleshooting WinSCP Permission Denied (Publickey)-Set COMPOSER_MEMORY_LIMIT to Solve PHP Memory Exhaustion

2026-06-13 13:31:35windows-fixes
Ubuntu APT Lock Troubleshooting Checklist - Troubleshooting WinSCP Permission Denied (Publickey)-Set COMPOSER_MEMORY_LIMIT to Solve PHP Memory Exhaustion

Final checklist

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