■
$ sudo aptitude install ruby ruby-dev rubygems irb rdoc libyaml-ruby libzlib-ruby libopenssl-ruby $ sudo gem install rubygems-update $ sudo /var/lib/gems/1.8/bin/update_rubygems $ sudo gem updat
$ sudo aptitude install ruby ruby-dev rubygems irb rdoc libyaml-ruby libzlib-ruby libopenssl-ruby $ sudo gem install rubygems-update $ sudo /var/lib/gems/1.8/bin/update_rubygems $ sudo gem updat