Absolute minimum: 1. MacOS or Linux Do everything in Terminal.app Configure it nicely: grey on black, 13pt monaco, etc setup shell w/ tab completion (b

Absolute minimum: 1. MacOS or Linux Do everything in Terminal.app Configure it nicely: grey on black, 13pt monaco, etc setup shell w/ tab completion (bash or zsh & oh-my-zsh) 2. Install homebrew (osx package manager) 2a. brew install git 2b. brew install vim (optional, nice to have newer version) 3. install vim-rails (which gives us syntax highlighting for ruby & js) 4. use rvm to install specific ruby versions etc as needed. Ready to work with ruby, rails, javascript.