$ sudo apt-get install curl $ gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 $ \curl -sSL https://get.rvm.io | bash -s stable 一旦ログアウト $ rvm list known $ $ sudo echo "" && rvm install ruby-2.0.0 $ rvm use 2.0.0