Knowledge base for software setup, errors, and daily tool work.

Fix Cloudflare Wildcard Subdomain Origin Server Errors

You set up a wildcard DNS record in Cloudflare (e.g., *.example.com) pointing to you...

How to Fix Nginx Upstream Connection Refused on Port 80

When nginx logs show "upstream connection refused" while connecting to port 80, it means ...

Fix 'Permission Denied' When Using mkdir in VS Code Terminal

You're working in the VS Code integrated terminal and run a mkdir command only t...

Cloudflare 522 Error Checklist: Causes and Fixes

If you see a 522 Connection Timed Out error when visiting your site, Cloudflare ...

How to Set Python Path in Windows 10