Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You run a Docker container and it stops almost instantly with exit code 0. This means the main pr...

After updating Git or your operating system, you may encounter the error fatal: unable to g...

Fix npm ERR! enoent ENOENT: package.json Not Found in node_modules
You run npm install or npm start and get something like:
...

Fix Nginx Permission Denied for SSL Certificate Files
When nginx refuses to start or reload with a "permission denied" error related to an SSL ...

Python Virtual Environment Not Activating in Git Bash: Fixes
You're in Git Bash on Windows, you run source venv/Scripts/activate, and nothing...

How to Fix Git Detached HEAD State and Undo Changes
You run git status and see something like "HEAD detached at abc123". This ha...