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

Docker Container Exits Immediately: No Error, Common Fixes

You run docker run and the container starts, then exits within a second. No error me...

Fixing Nginx Upstream Connection Refused on Port 443

You see "upstream connection refused" in your Nginx error log when proxying requests to p...

Manually Download and Fix Windows Update Error 0x80070002

You see error 0x80070002 when checking for updates. It usually means Windows Update can't fin...

How to Fix WiFi Connected but No Internet on Windows 11

You see the WiFi icon connected, but websites won't load, and apps report no internet. This i...

Understanding and Fixing Git Detached HEAD State

If you've seen the message You are in 'detached HEAD' state in Git, you ...

How to Fix Git Push Rejected Non-Fast-Forward Error