Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you open SourceTree and see a message like “You are in ‘detached HEAD’ state,” it means your w...

When you try to push a commit to a remote repository and get an error like error: GH001: La...

Setup Cloudflare Origin Certificate for Nginx
If you use Cloudflare as a reverse proxy, enabling HTTPS between Cloudflare and your Nginx server...

Fix 'node-sass build failed python not found' Error
If you see node-sass build failed python not found when running npm install

Fix Chrome Extensions Not Loading Configuration
You install a Chrome extension, configure it carefully, and then—nothing. The extension icon is g...

Fix Windows Defender Real-Time Protection Not Running
You open Windows Security and see a yellow warning: "Real-time protection is off." Or you...