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

Fix Nginx Configuration Test Failure After Adding Proxy Pass

You add a proxy_pass directive to an Nginx server block, run nginx -t, ...

Git Push Rejected Non Fast Forward: Troubleshooting Checklist

Cloudflare 522 Error Checklist: Causes and Fixes

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

How to Merge a Git Detached HEAD Back to Master

If you see a message like 'You are in 'detached HEAD' state' after checking out a...

Fix Cloudflare Wildcard Subdomain Origin Server Errors

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

Checklist for Troubleshooting Nginx Permission Denied Errors

Understanding the Problem

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