Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You've just added SSL certificates to your Nginx server block, but nginx -t retu...

If you're on a modern Linux distribution and see error: externally-managed-environment<...

Fix DNS Probe Finished NXDOMAIN Error on Mac
You're browsing on your Mac and suddenly a site won't load, showing the error DNS...

Fix VSCode Source Control Not Detecting Changes
You're working in Visual Studio Code, you edit a file, but the Source Control view shows no c...

Fix 'Git Remote Origin Already Exists' Error
When you run git remote add origin <url> and get fatal: remote origin al...

Bluetooth Hardware Not Found on Windows 11: Fixes
You open Bluetooth settings in Windows 11 and see 'Bluetooth hardware not found' – no swi...