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

Cloudflare DNS Not Updating After Change: Fixes That Work

You change a DNS record in Cloudflare, wait, and the old IP still resolves. This is a common frus...

Checklist for Pushing Large Files with Git

You've likely hit this: you try to push a commit, and Git rejects it because a file is too la...

Python Memory Error When Processing Large Files: Troubleshooting Checklist

You're running a Python script that reads a large file—maybe a CSV with millions of rows, a l...

Git Push Rejected Non Fast Forward: Troubleshooting Checklist

Passing Environment Variables to Docker Compose: A Practical Guide

When you run a multi-container application with Docker Compose, you often need to configure servi...

Docker Compose Environment Variable Not Updating? Fix It