Learn how to – Install Ruby 3 on RHEL 8|CentOS 8|Rocky Linux 8

Learn how to – 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
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
ruby                                3.1                                    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                             3.1.2-141.module+el8.7.0+1081+f0a69743                                 appstream                              88 k
Installing dependencies:
 ruby-default-gems                              noarch                             3.1.2-141.module+el8.7.0+1081+f0a69743                                 appstream                              78 k
 ruby-libs                                      x86_64                             3.1.2-141.module+el8.7.0+1081+f0a69743                                 appstream                             3.3 M
 rubygem-io-console                             x86_64                             0.5.11-141.module+el8.7.0+1081+f0a69743                                appstream                              72 k
 rubygem-json                                   x86_64                             2.6.1-141.module+el8.7.0+1081+f0a69743                                 appstream                              99 k
 rubygem-psych                                  x86_64                             4.0.3-141.module+el8.7.0+1081+f0a69743                                 appstream                              98 k
Installing weak dependencies:
 rubygem-bigdecimal                             x86_64                             3.1.1-141.module+el8.7.0+1081+f0a69743                                 appstream                             113 k
 rubygem-bundler                                noarch                             2.3.7-141.module+el8.7.0+1081+f0a69743                                 appstream                             448 k
 rubygem-rdoc                                   noarch                             6.4.0-141.module+el8.7.0+1081+f0a69743                                 appstream                             517 k
 rubygems                                       noarch                             3.3.7-141.module+el8.7.0+1081+f0a69743                                 appstream                             319 k
Installing module profiles:
 ruby/common
Enabling module streams:
 ruby                                                                              3.1

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

Total download size: 5.1 M
Installed size: 16 M
Is this ok [y/N]: y

Once installed, check version:

$ ruby --version
ruby 3.1.2p20 (2022-04-12 revision 4491bb740a) [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 1.2.0-59-g0704e65

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

$ rbenv install -l
2.7.7
3.0.5
3.1.3
3.2.1
jruby-9.4.1.0
mruby-3.2.0
picoruby-3.0.0
truffleruby-22.3.1
truffleruby+graalvm-22.3.1

Let’s install Ruby 3.2.1:

$ rbenv install 3.2.1
Installing ruby-3.2.1...
Installed ruby-3.2.1 to /home/technixleo/.rbenv/versions/3.2.1

Setting installed Ruby as global version:

rbenv global 3.2.1

Confirm Ruby version:

$ ruby --version

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

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