1 Hello, World. ➡ list 1-1 hello_server.rb require 'drb/drb' class Hello def hello puts('Hello, World.') end end DRb.start_service('druby://localhost:54000', Hello.new) sleep ➡ list 1-2 hello_client.rb require 'drb/drb' DRb.start_service ro = DRbObject.new_with_uri('druby://localhost:54000') ro.hello 1 hello_server.rb ➡ terminal 1 $ ruby hello_server.rb 2 hello_client.rb ➡ terminal 2 $ ruby hello_