How to Install Ruby on Rails with PostgreSQL on Rocky Linux 8.4

This guide will help you install Ruby on Rails with PostgreSQL on Rocky Linux 8.4.

Step 1: Update the System

Before installing any packages, ensure your system is updated:

sudo dnf update -y

Step 2: Install Required Dependencies

Install the necessary development tools:

sudo dnf groupinstall "Development Tools" -y

Also, install some essential libraries:

sudo dnf install -y \
    sqlite-devel \
    postgresql-devel \
    libxml2-devel \
    libxslt-devel \
    ImageMagick-devel \
    curl \
    git

Step 3: Install Ruby

Install rbenv and ruby-build to manage Ruby versions:

git clone https://github.com/rbenv/rbenv.git ~/.rbenv
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bash_profile
echo 'eval "$(rbenv init -)"' >> ~/.bash_profile
source ~/.bash_profile
git clone https://github.com/rbenv/ruby-build.git ~/.rbenv/plugins/ruby-build

Now install Ruby:

rbenv install 3.1.0
rbenv global 3.1.0

Step 4: Install Rails

Install Rails using the gem command:

gem install rails

Step 5: Install PostgreSQL

Install PostgreSQL server:

sudo dnf install -y postgresql-server postgresql-contrib

Initialize the PostgreSQL database:

sudo postgresql-setup --initdb

Start and enable the PostgreSQL service:

sudo systemctl start postgresql
sudo systemctl enable postgresql

Step 6: Create a PostgreSQL User

Switch to the PostgreSQL user and create a new user:

sudo -i -u postgres
createuser --interactive

Follow the prompts to create a user.

Step 7: Create a New Rails Application

Create a new Rails application with PostgreSQL as the database:

rails new myapp -d postgresql

Step 8: Configure Database Settings

Edit the config/database.yml file to set the database username and password:

nano myapp/config/database.yml

Update the default section with your PostgreSQL credentials.

Step 9: Create the Database

Run the following command to create the database:

cd myapp
rails db:create

Conclusion

Congratulations! You have successfully installed Ruby on Rails with PostgreSQL on Rocky Linux 8.4. You can now start building your applications!

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