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 ...

Fix NET::ERR_CERT_AUTHORITY_INVALID via Chrome Enterprise Policy

If you see NET::ERR_CERT_AUTHORITY_INVALID in Chrome on a managed device, the is...

Fix 'pip externally managed environment' Error in Python 3.12

If you're using Python 3.12 on a modern Linux distribution (like Fedora 38+, Ubuntu 23.04+, o...

Fix Docker Container Exits Immediately in Background Mode

You run a Docker container with -d (detached mode) and it exits immediately. The con...

How to Use Chrome Task Manager to Find Memory Hogs

If your computer starts slowing down, Chrome's built-in Task Manager can help you find which ...

Fix Python Permission Denied When Installing Package via Docker