Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You run git clone and after a long pause see connection timed out. This...

You run npm install or npm start and get npm ERR! package.json no...

Fix ERR_CERT_AUTHORITY_INVALID on Localhost
When testing a local web app, you may see ERR_CERT_AUTHORITY_INVALID in Chrome or si...

Fix Docker Pull Access Denied in CI/CD Pipeline
When a CI/CD pipeline fails with denied: requested access to the resource is denied ...

Fix Docker Compose Environment Variable Missing Errors
You run docker-compose up and see errors like WARNING: The VARIABLE_NAME varia...

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