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

How to Push a Git Detached HEAD to Remote

You're working on a Git repository and realize you're in a 'detached HEAD' state....

How to Merge Two Git Repositories with Unrelated Histories

You have two separate Git repositories that you now want to combine into one. Perhaps you acquire...

Fix 'fatal: refusing to merge unrelated histories' in Git

You cloned a repository, made some commits locally, and now when you try to git pull...

Resolve Python Package Version Mismatch Errors

You run pip install and see errors like “package A requires package B==1.0 but y...