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

Cloudflare SSL Full Strict Troubleshooting Steps

If you have set Cloudflare SSL/TLS encryption to Full (strict) and your site shows errors like 52...

Cloudflare DNS Not Propagating After SSL Certificate Change

You changed an SSL certificate in Cloudflare, but DNS changes aren't showing up. This is a co...

Fixing Nginx Permission Denied on Mounted Drive

When you mount an external drive and point Nginx to serve files from it, you may get a 403 Forbid...

Nginx Upstream Connection Refused: Fixing localhost Errors

You set up an nginx reverse proxy to forward requests to a backend service on localhost, but ngin...

Fix 'pip install' Permission Denied on Ubuntu