Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You see a message like 'You are in 'detached HEAD' state' when checking out a com...

You try to install a Python package with pip install somepackage and get a Per...

How to Fix Git Merge Conflicts When Pulling from Remote
When you run git pull and see a merge conflict, it means your local changes and the ...

Fix Nginx Configuration Test Failure from Rewrite Rules
You run nginx -t and get an error. The log points to a rewrite rule. This is common ...

Why npm Says 'package.json Not Found' and How to Fix It
You run npm install or npm start and get npm ERR! package.json no...

How to Fix Git 'index.lock' File Exists Error
When you see fatal: Unable to create 'path/.git/index.lock': File exists., G...