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

Fix Docker Container Exits Immediately After Start

You run docker run myimage and the container stops almost instantly. This is a commo...

Fix Chrome Black Screen After Disabling Hardware Acceleration

If Chrome shows a black screen after you turn off hardware acceleration, you're not alone. Th...

Fix NET::ERR_CERT_AUTHORITY_INVALID in Chrome

When Chrome shows 'NET::ERR_CERT_AUTHORITY_INVALID', it means the browser cannot verify t...

How to Resolve Cloudflare 522 Timeout Error

When you see a Cloudflare 522 timeout error, it means Cloudflare successfully connected to your o...

Fix Nginx Upstream Connection Refused Socket Error