Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You open Chrome and notice some extensions are missing or not loading. This often happens when sy...

After restarting nginx, you might see errors like connect() to unix:/var/run/php-fpm.sock f...

Fix Python venv Not Activating in VS Code Terminal
When you create a Python virtual environment but it doesn't activate in the VS Code terminal,...

Docker System DF Shows No Space Left: Fixes & Checks
When you run docker system df and see no space left on device, your Doc...

How to Fix a Detached HEAD with Git Reset --hard
You're working in Git, and suddenly you see a warning: You are in 'detached HEAD...

Git Fatal: Refusing to Merge Unrelated Histories – Workaround
You try to merge two Git branches and get this error:
fatal: refusing to merge unre...