Install Ruby and Rails in Ruby
From the Ruby on Rails cheat sheet · Setup · verified Jul 2026
Install Ruby and Rails
Install Ruby with Mise, add Rails, and generate a new application.
bash
# Install Mise, activate it, then install Ruby 3
curl https://mise.run | sh
eval "$(~/.local/bin/mise activate bash)"
mise use -g ruby@3
# Install and verify Rails
gem install rails
ruby --version
rails --version📌 Rails 8.1 requires Ruby 3.2 or newer
💡 A version manager keeps the system Ruby untouched
🔍 Use bin/rails inside an app to run its locked Rails version
🎯 Visit localhost port 3000 after the server starts
installrubymiserails-new
Continue with Ruby on Rails
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