Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

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Latest checklists

You try to install a Python package with pip install somepackage and get a Per...

Fix Docker Nginx 502 Bad Gateway with MySQL
You have a Dockerized web app behind Nginx, and you're seeing a 502 Bad Gateway error. The ap...

How to Fix "docker context canceled" on Mac
If you're seeing "context canceled" errors when running Docker commands on your Mac, ...

Git Fatal: Refusing to Merge Unrelated Histories – Workaround
You try to merge two Git branches and get this error:
fatal: refusing to merge unre...

Fix Virtual Environment Not Activating in Terminal
Why Your Virtual Environment Won't Activate
You open a terminal, navigate to your pro...

Fix VS Code Terminal Not Opening PowerShell
If you click the terminal panel in VS Code and nothing happens, or it opens a blank shell instead...