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

Fix Cloudflare Wildcard Subdomain and Root Domain Conflict

If you use a wildcard DNS record (e.g., *.example.com) on Cloudflare, you may run in...

Cloudflare DNS Propagation Not Working with New Domain: Fixes

You registered a new domain, set it up with Cloudflare, but after hours (or days) the site still ...

How to Clear DNS Cache to Fix ERR_NAME_NOT_RESOLVED

You try to visit a website, but Chrome shows ERR_NAME_NOT_RESOLVED or your brows...

Checklist for Troubleshooting Nginx Permission Denied Errors

Understanding the Problem

When Nginx returns a 403 Forbidden or logs an error like ...