How To Install Ruby on Rails on CentOS 8

In this tutorial, we will show you how to install Ruby on Rails on CentOS 8. For those of you who didn’t know, Ruby on Rails (RoR) is a framework written in the Ruby programming language that allows you to use Ruby in combination with HTML, CSS, and similar programming languages. It is used by many developers since it makes application development very simple.

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you the step-by-step installation of Ruby on Rails on CentOS 8.

Prerequisites

• A server running one of the following operating systems: CentOS 8.
• It’s recommended that you use a fresh OS install to prevent any potential issues.
• SSH access to the server (or just open Terminal if you’re on a desktop).
• A non-root sudo user or access to the root user. We recommend acting as a non-root sudo user, however, as you can harm your system if you’re not careful when acting as the root.

Install Ruby on Rails on CentOS 8

Step 1. First, let’s start by ensuring your system is up-to-date.

sudo dnf update
sudo dnf install curl gnupg2 tar

Step 2. Installing Ruby.

Now, we download and run the RVM installation script:

curl -sSL https://get.rvm.io | bash

Finally, the system environment variables need to be refreshed, so that the ruby variables are added:

source /etc/profile.d/rvm.sh

Then we can check out all the versions of Ruby that we can install with RVM:

rvm list known

And finally install the version we want, in this case, I will choose 2.7.2:

rvm install 2.7.2

When the installation is finished, we can query for the version of Ruby:

ruby --version

Step 3. Installing Rails.

To install Rails on your CentOS 8 system, you can run the following command:

gem install rails

However, we can also specify a specific version:

gem install rails -v [version]

To check the version of Rails, you can execute the command below:

[root@idroot.us ~]# rails -v
Rails 6.0.4.1

Congratulations! You have successfully installed Ruby on Rails. Thanks for using this tutorial for installing Ruby on Rails on CentOS 8 systems. For additional help or useful information, we recommend you to check the official Ruby on Rails website.