In this section, we will guide you through the process of setting up the Ruby on Rails environment on your machine. This setup is essential for developing and running Rails applications. We will cover the following steps:

1. Installing Ruby
2. Installing Rails
3. Setting Up a Database
4. Creating a New Rails Application
5. Running the Rails Server

Before you can install Rails, you need to have Ruby installed on your machine. Follow these steps to install Ruby:

1. Install Homebrew (if you don't have it already):

   /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
   

2. Install Ruby using Homebrew:

   brew install ruby
   

1. Download and install RubyInstaller from rubyinstaller.org.
2. Follow the installation instructions and ensure you check the option to add Ruby to your PATH.

1. Install Ruby using a package manager:

   sudo apt-get install ruby-full
   

Run the following command to verify that Ruby is installed correctly:

You should see the version of Ruby installed.

Once Ruby is installed, you can install Rails using the gem package manager, which comes with Ruby.

Run the following command to install Rails:

Run the following command to verify that Rails is installed correctly:

You should see the version of Rails installed.

Rails supports several databases, but we will use SQLite3 for simplicity. SQLite3 is the default database for Rails and is sufficient for development and testing.

For macOS:

For Windows: Download and install SQLite3 from sqlite.org.

For Linux:

Run the following command to verify that SQLite3 is installed correctly:

You should see the version of SQLite3 installed.

With Ruby, Rails, and SQLite3 installed, you can now create a new Rails application.

Run the following command to create a new Rails application:

Replace myapp with the name of your application.

Now that you have created a new Rails application, you can start the Rails server to see your application in action.

Run the following command to start the Rails server:

Open your web browser and navigate to http://localhost:3000. You should see the default Rails welcome page.

In this section, you have learned how to set up the Ruby on Rails environment on your machine. You installed Ruby, Rails, and SQLite3, created a new Rails application, and started the Rails server. You are now ready to start developing your Rails application.

In the next section, we will cover how to create a simple Rails application and explore the MVC (Model-View-Controller) architecture that Rails uses.