Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

When you see node-sass build failed during an npm install, it usually means the nati...

When you type python in Command Prompt and see 'python' is not recogni...

Fix Git 'index.lock' Error in VS Code
If you see the error 'fatal: Unable to create 'path/.git/index.lock': File exists'...

Fix 'npm package json not found' Error When Using npx
When you run npx some-package and see an error like “npm package json not found”...

Fix Nginx 502 Bad Gateway with Docker and PHP-FPM
You have a Docker setup with Nginx proxying to a PHP-FPM container, and you're getting a 502 ...

Fix Docker Container Exits Immediately After Start
You run docker run myimage and the container stops almost instantly. This is a commo...