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

Fix Cloudflare Wildcard Subdomain DNS Propagation Delay

You set up a wildcard DNS record (e.g., *.example.com) in Cloudflare, but new subdom...

Fix Nginx 502 Bad Gateway on Docker Ubuntu

Resolving Python Dependency Conflicts in setup.py

When you run pip install . or python setup.py develop, a dependency con...

Docker Desktop Engine Stopped on Mac M1: Fixes That Work

On Apple Silicon Macs (M1, M2, M3), Docker Desktop sometimes shows the error “Docker Desktop engi...

Fix 'Externally Managed Environment' Error on Linux

If you're on a modern Linux distribution (Ubuntu 23.04+, Debian 12+, Fedora 38+, etc.) and ge...

Fix VS Code Source Control Not Detecting Changes with Permission Denied

You open VS Code, make edits, but the Source Control panel shows no changes. Or you see a "pe...