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

Fixing Nginx Upstream Connection Refused in Load Balancing

When Nginx load balancing returns upstream connection refused, it means one or more ...

How to Fix Cloudflare SSL Full Strict Self-Signed Certificate Error

Fix Chrome Black Screen During Videos: Hardware Acceleration

If you're watching a video in Chrome and the screen goes black (but audio continues), hardwar...

Checklist for Pushing Large Files with Git

You've likely hit this: you try to push a commit, and Git rejects it because a file is too la...