
Ruby is popular, dynamic and flexible open source programming language. It has an elegant syntax that is natural to read and easy to write. We’ll show how to install Ruby from CentOS default repositories and using the Rbenv and RVM scripts on CentOS 8 system. Choose the installation method that is most appropriate for your setup and environment.
Installing Ruby from the CentOS repositories
It’s very straightforward to install Ruby from CentOS repositories. At the time of writing, the version in the standard CentOS repositories is 2.5.5
.
To install the ruby package, execute following command as non-root user with sudo privileges:
sudo dnf install ruby
Verify the Ruby version, once the installation is complete, type:
ruby --version
That’s done!
Install Ruby with Rbenv
Rbenv is a Ruby version management tool that allows you to switch Ruby versions easily. By default Rbenv doesn’t handle installing Ruby versions so we also need to install ruby-build
that will help you to install specific version of Ruby. Follow the below instruction as root or sudo user to install Ruby with Rbenv:
Now, install dependencies for installation of rbenv
and ruby-build
:
sudo dnf install git wget gcc bzip2 openssl-devel libffi-devel readline-devel zlib-devel gdbm-devel ncurses-devel
After that, simply clone rbenv GitHub repository into the ~/.rbenv
folder:
git clone https://github.com/rbenv/rbenv.git ~/.rbenv
Next, run the following commands to set up rbenv
:
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bashrc
echo 'eval "$(rbenv init -)"' >> ~/.bashrc
exec $SHELL
Now download the ruby-build plugin into the plugins folder of rbenv as follows:
git clone https://github.com/rbenv/ruby-build.git ~/.rbenv/plugins/ruby-build
echo 'export PATH="$HOME/.rbenv/plugins/ruby-build/bin:$PATH"' >> ~/.bashrc
exec $SHELL
The ruby-build
plugin adds the install command to rbenv
.
To get a list of all Ruby versions that can be installed with rbenv
enter:
rbenv install -l
To install Ruby version 2.7.1
and set it as default version, type:
rbenv install 2.7.1
rbenv global 2.7.1
Verify installation by issuing below command:
ruby -v
Install Ruby using RVM
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 the dependencies required to build Ruby from source:
sudo dnf install curl gcc bzip2 openssl-devel libffi-devel readline-devel zlib-devel gdbm-devel ncurses-devel
Run the following commands to add the GPG key and install RVM:
gpg2 --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
curl -sSL https://get.rvm.io | bash -s stable
To start using RVM, type:
source ~/.rvm/scripts/rvm
Install the latest stable version 2.7.1
of Ruby with RVM
and set it as the default version:
rvm install 2.7.1
rvm use 2.7.1 --default
Verify that Ruby installed properly by checking it’s version:
ruby -v
Conclusion
We shown you two methods to install Ruby on CentOS 8 system. The method depends on your requirements and preferences.
If you have any problem or suggestion please leave a comment below.
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