Checklists for software errors, setup, and tool workflows.

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Fix Nginx Upstream Connection Refused in Proxy Pass

When Nginx returns a 502 Bad Gateway or logs upstream connection refused

Fix Chrome Black Screen in Remote Desktop with Hardware Acceleration Off
You're remoted into another machine, open Chrome, and the screen goes black—or the browser wi...

Fix Python Venv Not Activating in PowerShell
You open PowerShell, navigate to your project, and run venv\Scripts\activate but not...

Fix Nginx 502 Bad Gateway: Upstream Connection Refused
If you're seeing a 502 Bad Gateway error with "upstream connection refused" in your N...

Git Merge Unrelated Histories with Conflicts: How to Resolve
You try to merge two git branches and get an error like fatal: refusing to merge unrelated ...

Fix 'Externally Managed Environment' Error in pip
If you see error: externally-managed-environment when running pip on Linux, it means...

Checklists for software errors, setup, and tool workflows.

Latest checklists

Fix Nginx Upstream Connection Refused in Proxy Pass

Fix Chrome Black Screen in Remote Desktop with Hardware Acceleration Off

Fix Python Venv Not Activating in PowerShell

Fix Nginx 502 Bad Gateway: Upstream Connection Refused

Git Merge Unrelated Histories with Conflicts: How to Resolve

Fix 'Externally Managed Environment' Error in pip

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