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

Fix Cloudflare Wildcard Subdomain Not Resolving

You set up a wildcard DNS record in Cloudflare (e.g., *.example.com) expecting all s...

Fix Nginx 502 Bad Gateway on Docker Ubuntu

Fix Windows Search Indexing Error 0x80040c41

If you see error 0x80040c41 when searching in Windows, the indexing service is likely stuck due t...

Fixing Python Memory Errors When Processing Large Files in Parts

When you try to process a large file (e.g., multi-GB CSV, log, or binary) in Python, you might hi...

VS Code Terminal Blank Screen: Quick Fixes

You open the integrated terminal in VS Code, but instead of a prompt, you get a blank or black sc...

Fix Docker Volume Permission Denied as Root

You start a container as root, mount a volume, and get a 'permission denied' error. This ...