Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

When you run nginx -t and get a failure, the server won't reload or restart. Thi...

You open Chrome, head to your extensions, and nothing loads—or newly installed ones disappear. On...

When you open the integrated terminal in VS Code and run a command, you might see permissio...

How to Fix Nginx 'Upstream Connection Refused' Error
When Nginx returns a 502 Bad Gateway with upstream connection refused in the error l...

Fix Node.js Out of Memory When Building React Apps
When building a React app, you might see a fatal error like FATAL ERROR: Ineffective mark-c...

Fix 'Port Already Used by Another Container' in Docker Compose
When you run docker compose up and see an error like port is already allocated...