Installation Guide
First, check if you already have Ruby installed by running "ruby -v" in your terminal.
Install by operating system via package manager:
Ubuntu or Debian
sudo apt-get install ruby-full
macOS
brew install ruby
Arch Linux
sudo pacman -S ruby
sudo pacman -S ruby
Gentoo
sudo emerge dev-lang/ruby
CentOS or Red Hat
sudo yum install ruby
Now type in irb
Then type in puts "Hello World!"
You're now using Ruby!
To check your Ruby version run "ruby -v" in your terminal.
You can also install Ruby using rbenv for Linux/macOS/WSL