Ruby

Install and manage Ruby locally (Windows, macOS, Linux) using installers or version managers; use Bundler for dependencies.

🧾 Overview

Ruby is used for bots, APIs (Sinatra), and full frameworks (Rails). Local installation lets you manage gems and test before deploying.

Ruby Programming Languagewww.ruby-lang.org

Bundler: The best way to manage a Ruby application's gemsbundler.io

---

📥 Installation (choose one)

🪟 Windows

1

Download the latest Ruby+Devkit (x64) from https://rubyinstaller.org/downloads/

2

Run installer (enable MSYS2 when prompted).

3

Let post-install script finish (toolchain setup).

4

Verify & install bundler

ruby -v
gem -v
gem install bundler
bundler -v

5

Initialize project (optional)

bundle init
bundle install

🐧 Linux

Debian/Ubuntu

sudo apt update
sudo apt install -y ruby-full build-essential
ruby -v
gem -v
gem install bundler

Fedora

sudo dnf install -y ruby ruby-devel @development-tools
ruby -v
gem -v
gem install bundler

Arch

sudo pacman -S --needed ruby base-devel
ruby -v
gem -v
gem install bundler

rbenv

Dependencies (Debian example):

sudo apt update
sudo apt install -y build-essential libssl-dev libreadline-dev zlib1g-dev \
libyaml-dev libffi-dev libgdbm-dev libncurses5-dev libsqlite3-dev

Install rbenv + ruby-build:

git clone https://github.com/rbenv/rbenv.git ~/.rbenv
git clone https://github.com/rbenv/ruby-build.git ~/.rbenv/plugins/ruby-build
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bashrc
echo 'eval "$(rbenv init -)"' >> ~/.bashrc
source ~/.bashrc
rbenv install 3.3.0
rbenv global 3.3.0
ruby -v
gem install bundler

🍎 macOS

Homebrew

brew update
brew install ruby
echo 'export PATH="/opt/homebrew/opt/ruby/bin:$PATH"' >> ~/.zshrc
source ~/.zshrc
ruby -v
gem -v
gem install bundler

rbenv

brew install rbenv
echo 'eval "$(rbenv init -)"' >> ~/.zshrc
source ~/.zshrc
rbenv install 3.3.0
rbenv global 3.3.0
ruby -v
gem install bundler

---

✅ Verification

ruby -v
gem -v
bundler -v

All commands should output versions.

---

💎 Managing Gems

1

Initialize

bundle init

2

Add to Gemfile

gem "httparty"

3

Install / update

bundle install
bundle update httparty

4

Run script with locked environment

bundle exec ruby app.rb

---

🔄 Updating

Target	Command
Ruby (rbenv)	rbenv install <version> && rbenv global <version>
All gems	bundle update
One gem	bundle update <name>
Bundler	gem install bundler

---

🗃 Common Commands

gem list
gem install <name>
gem uninstall <name>
bundle init
bundle install
bundle update
bundle exec ruby main.rb