Ruby programming language interpreter. See also:
gem,bundler,rake,irb. More information: https://manned.org/ruby.
ruby {{script.rb}}
ruby -e {{command}}
ruby -c {{script.rb}}
ruby -run -e httpd
ruby -I {{path/to/library_folder}} -r {{library_require_name}} {{path/to/bin_folder/bin_name}}
ruby -v