Last year, I repurposed an old laptop into a simple home server. Linux skills? Just the basics: cd, ls, mkdir, touch. Nothing too fancy. As things got more co

Last year, I repurposed an old laptop into a simple home server. Linux skills? Just the basics: cd, ls, mkdir, touch. Nothing too fancy. As things got more complex, I found myself constantly copy-pasting terminal commands from ChatGPT without really understanding them. So I built a tiny, offline Linux tutor: - Runs locally with Phi-2 (2.7B model, textbook training) - Uses MiniLM embeddings to vectorize Linux textbooks and TLDR examples - Stores everything in a local ChromaDB vector store - When I run a command, it fetches relevant knowledge and feeds it into Phi-2 for a clear explanation. No internet. No API fees. No cloud. Just a decade-old ThinkPad and some lightweight models. Full build story + repo here: https://www.rafaelviana.io/posts/linux-tutor https://www.rafaelviana.io/posts/linux-tutor