Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You try to install a Python package with pip, and get an error like error: externally-manag...

Docker Compose Environment Variable Not Set in Container: Fixes
You ran docker-compose up, but the environment variable you defined isn't availa...

Fixing Nginx Redirect Loop Configuration Issues
You set up an Nginx redirect but now the browser says the page isn't redirecting properly – y...

Fix Docker 'No Space Left on Device' on Mac
You're running Docker on a Mac and suddenly get an error: no space left on device

Fix NET::ERR_CERT_AUTHORITY_INVALID via Chrome Enterprise Policy
If you see NET::ERR_CERT_AUTHORITY_INVALID in Chrome on a managed device, the is...

How to Manually Remove a Stuck Git index.lock File
If Git operations suddenly fail with an error like fatal: Unable to create 'path/.git/i...