I tried it in Ubuntu 14.04.2 LTS, and it is working fine

Step 1: (the purpose of the first line in designating which interpreter to use for the rest of the file), and save the file as a hello-world.rb

#!/usr/bin/env ruby
puts "Hello World!"

Step 2: (make the file executable with the below command)

chmod u+x hello-world.rb

Step 3:

./hello-world.rb

Please note that if your platform doesn't support the `#!/usr/bin/env` convention, then don't forget that the script can be run by passing it to the Ruby interpreter manually:

<path_to_ruby_interpreter> -w hello-world.rb

Posted on October 26, 2015 by Amit Pandya in Ruby, Ubuntu