Install Ruby 3 on RHEL 8|CentOS 8|Rocky Linux 8

In this guide, we will look at how you can Install Ruby 3 on RHEL 8 / CentOS 8 / Rocky Linux 8 system. 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 3 on RHEL 8 / CentOS 8 / Rocky Linux 8 with RVM Ruby Version Manager.

Option 1) Install Ruby 3 on RHEL 8|CentOS 8|Rocky Linux 8 from Repo

RHEL 8 provides Ruby 2 and 3 in AppStream repository. You can confirm its availability using the command:

$ sudo yum module list ruby
Last metadata expiration check: 2:29:55 ago on Thu 05 May 2022 11:52:58 AM UTC.
Rocky Linux 8 - AppStream
Name                              Stream                               Profiles                                Summary
ruby                              2.5 [d]                              common [d]                              An interpreter of object-oriented scripting language
ruby                              2.6                                  common [d]                              An interpreter of object-oriented scripting language
ruby                              2.7                                  common [d]                              An interpreter of object-oriented scripting language
ruby                              3.0                                  common [d]                              An interpreter of object-oriented scripting language

Hint: [d]efault, [e]nabled, [x]disabled, [i]nstalled

Disable default Ruby AppStream module on your system

sudo dnf module reset ruby -y

To specify the module version, use the command:

sudo yum install @ruby:3.0

Proceed with the installation:

Dependencies resolved.
================================================================================================================================================================================================
 Package                                       Architecture                      Version                                                             Repository                            Size
================================================================================================================================================================================================
Installing group/module packages:
 ruby                                          x86_64                            3.0.2-140.module+el8.5.0+668+665814fa                               appstream                             88 k
Installing dependencies:
 ruby-libs                                     x86_64                            3.0.2-140.module+el8.5.0+668+665814fa                               appstream                            3.2 M
 rubygem-io-console                            x86_64                            0.5.7-140.module+el8.5.0+668+665814fa                               appstream                             72 k
 rubygem-json                                  x86_64                            2.5.1-140.module+el8.5.0+668+665814fa                               appstream                             99 k
 rubygem-psych                                 x86_64                            3.3.0-140.module+el8.5.0+668+665814fa                               appstream                             98 k
Installing weak dependencies:
 ruby-default-gems                             noarch                            3.0.2-140.module+el8.5.0+668+665814fa                               appstream                             79 k
 rubygem-bigdecimal                            x86_64                            3.0.0-140.module+el8.5.0+668+665814fa                               appstream                            101 k
 rubygem-bundler                               noarch                            2.2.22-140.module+el8.5.0+668+665814fa                              appstream                            443 k
 rubygem-rdoc                                  noarch                            6.3.1-140.module+el8.5.0+668+665814fa                               appstream                            458 k
 rubygems                                      noarch                            3.2.22-140.module+el8.5.0+668+665814fa                              appstream                            318 k
Installing module profiles:
 ruby/common
Enabling module streams:
 ruby                                                                            3.0

Transaction Summary
================================================================================================================================================================================================
Install  10 Packages

Total download size: 5.0 M
Installed size: 16 M
Is this ok [y/N]: y

Once installed, check version:

$ ruby --version
ruby 3.0.2p107 (2021-07-07 revision 0db68f0233) [x86_64-linux]

Option 2) Install Ruby 3 using rbenv on RHEL 8|CentOS 8|Rocky Linux 8

Rbenv 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.

Install common tools required

sudo dnf -y install git make gcc curl openssl-devel zlib-devel libffi-devel readline-devel sqlite-devel

Install required rbenv tool by running the following commands:

curl -fsSL https://github.com/rbenv/rbenv-installer/raw/HEAD/bin/rbenv-installer | bash

Configure environment for Rbenv

echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bashrc
echo 'eval "$(rbenv init -)"' >> ~/.bashrc
source ~/.bashrc

Confirm rbenv version

$ rbenv -v
rbenv 1.2.0-14-gc6cc0a1

Print a list of all Ruby versions that can be installed with rbenv:

$ rbenv install -l
2.6.10
2.7.6
3.0.4
3.1.2
jruby-9.3.4.0
mruby-3.0.0
rbx-5.0
truffleruby-22.1.0
truffleruby+graalvm-22.1.0

Let’s install Ruby 3.1.2:

$ rbenv install 3.1.2
Installing ruby-3.1.2...
Installed ruby-3.1.2 to /home/technixleo/.rbenv/versions/3.1.2

Setting installed Ruby as global version:

rbenv global 3.1.2

Confirm Ruby version:

$ ruby --version
ruby 3.1.2p20 (2022-04-12 revision 4491bb740a) [x86_64-linux]

You have successfully installed Ruby on RHEL 8|CentOS 8|Rocky Linux 8.