Ruby on Rails is a powerful web application framework that allows developers to create high-quality web applications quickly and efficiently. In this guide, we will walk through the steps to install Ruby on Rails with PostgreSQL on Rocky Linux 8.4.

Step 1: Update Your System

Start by ensuring your system is up to date:

sudo dnf update -y

Step 2: Install Required Dependencies

Install the necessary packages, including PostgreSQL, Git, and development tools:

sudo dnf install -y gcc gcc-c++ make \
    postgresql postgresql-server postgresql-devel \
    git

Step 3: Install Ruby

Install Ruby using the RVM (Ruby Version Manager) for managing Ruby versions:

sudo dnf install -y curl
curl -sSL https://get.rvm.io | bash -s stable

Load RVM and install Ruby:

source ~/.rvm/scripts/rvm
rvm install 3.0.0
rvm use 3.0.0 --default

Step 4: Install Rails

Now that Ruby is installed, you can install Rails:

gem install rails

Step 5: Configure PostgreSQL

Initialize and start the PostgreSQL service:

sudo postgresql-setup --initdb
sudo systemctl start postgresql
sudo systemctl enable postgresql

Next, create a new PostgreSQL user for your Rails application:

sudo -u postgres psql
CREATE USER railsuser WITH PASSWORD 'your_password';
ALTER USER railsuser CREATEDB;
\q

Replace your_password with a strong password of your choice.

Step 6: Create a New Rails Application

Create a new Rails application with PostgreSQL as the database:

rails new myapp -d postgresql

Navigate to the application directory:

cd myapp

Step 7: Configure Database Settings

Edit the config/database.yml file to set up the database connection:

nano config/database.yml

Update the configuration as follows:

development:
  adapter: postgresql
  encoding: unicode
  database: myapp_development
  pool: 5
  username: railsuser
  password: your_password

Step 8: Create the Database

Run the following command to create the database:

rails db:create

Step 9: Start the Rails Server

Start the Rails development server:

rails server -b 0.0.0.0

Step 10: Access Your Application

Open your web browser and navigate to:

http://your_server_ip:3000

Conclusion

You have successfully installed Ruby on Rails with PostgreSQL on Rocky Linux 8.4. This setup provides a solid foundation for developing web applications.

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