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

Nginx Upstream Connection Refused: Diagnosis and Fixes

When Nginx returns a 502 Bad Gateway or logs "upstream connection refused", it means Ngin...

How to Fix Nginx Redirect Loop from HTTP to HTTPS

If you're seeing an infinite redirect loop when trying to force HTTPS in nginx, the browser u...

Fix Git SSL Certificate Problem: Unable to Get Local Issuer Certificate

Fix WiFi Connected But No Internet on Windows 11 Using Netsh

You connect to WiFi, see full bars, but websites won't load. This is common on Windows 11. Th...

Docker Container Exits Immediately: Diagnosing Out of Memory

You start a Docker container and it exits within seconds. The logs show nothing obvious, or they ...

Chrome Memory Not Decreasing After Closing Tabs – Fixes

You close a dozen tabs, but Chrome still eats 2 GB of RAM. This is normal up to a point—Chrome ca...