thufir@arrakis:~/sun_tutorial$ 
thufir@arrakis:~/sun_tutorial$ 
thufir@arrakis:~/sun_tutorial$ ruby test_system.rb 
test_system.rb:3:in `test': uninitialized constant System (NameError)
        from test_system.rb:9
thufir@arrakis:~/sun_tutorial$ 
thufir@arrakis:~/sun_tutorial$ cat test_system.rb 
def test

System.Console.WriteLine("hello world")

end



test
thufir@arrakis:~/sun_tutorial$ 
thufir@arrakis:~/sun_tutorial$