Checklists for software errors, setup, and tool workflows.

Fix Nginx Configuration Test Failure from Rewrite Rules

You run nginx -t and get an error. The log points to a rewrite rule. This is common ...

Fix Nginx Permission Denied for Static Files

Common Causes

When Nginx returns a 403 Forbidden or 'permission denied' error for...

How to Fix Windows Update Service Not Running

If Windows Update won't start or you see an error like "Windows Update cannot check for u...

How to Speed Up Cloudflare DNS Propagation

When you change DNS records in Cloudflare, propagation can sometimes feel slow. While you can'...

Fix Nginx 502 Bad Gateway: Upstream Connection Refused

If you're seeing a 502 Bad Gateway error with "upstream connection refused" in your N...