In this guide, we will look at how you can Install Ruby 2.5 on RHEL 8 / CentOS 8. Ruby is a dynamic, open source, object-oriented scripting language created with simplicity and productivity in mind. In this guide, I’ll show you how to Install Ruby 2.5 on RHEL 8 / CentOS 8with RVM Ruby Version Manager.

Step 1: Install Ruby 2.5 on RHEL 8 / CentOS 8

RHEL 8 provides Ruby 2.5 in Appstream repository. You can confirm its availability using the command:

$ sudo yum module list | grep ruby
ruby 2.5 [d] default [d] An interpreter of object-oriented scripting language

Since it is the only module of Ruby available, it can be installed by just running:

sudo yum install @ruby

To specify the module version, use the command:

sudo yum install @ruby:2.5

Once installed, check version:

$ ruby --version
ruby 2.5.3p105 (2018-10-18 revision 65156) [x86_64-linux]

Step 2: Install RVM on RHEL 8 / CentOS 8

RVM is a command-line tool which allows you to easily install, manage, and work with multiple ruby environments from interpreters to sets of gems. Install RVM on RHEL 8 by running the commands below in your terminal

curl -sSL https://rvm.io/mpapis.asc | sudo gpg --import -
curl -L get.rvm.io | sudo bash -s stable

Add all users that will be using rvm to ‘rvm‘ group

sudo usermod -aG rvm $USER

Example:

$ sudo usermod -aG rvm jmutai
$ id jmutai
uid=1000(jmutai) gid=1000(jmutai) groups=1000(jmutai),10(wheel),1001(rvm)

To start using RVM you need to run:

$ source /etc/profile.d/rvm.sh
$ rvm reload
RVM reloaded!

Step 3: Install RVM dependencies

Install dependencies by running the command:

# rvm requirements run
Checking requirements for centos.

Installing requirements for centos.
Installing required packages: libffi-devel, readline-devel, sqlite-devel, zlib-devel, openssl-devel\
................
Requirements installation successful.

A different version of Ruby can be installed using rvm install

rvm install 2.5.2

You have successfully installed Ruby on RHEL 8 / CentOS 8.