我刚刚通过RVM在ubuntu 11.04上安装了ruby 1.9.2,然后sudo安装了rubygem。NOTE: Gem::Specification#default_executable= is deprecated with no replacement. It will be removed on or after 2011-10-01.
Gem::Specification#default_executable= called from /home/shrimpy/.rvm/gems/ruby-1.9.2-p180@global