ruby 1.9.3 gem install rails 报错

错误:

$geminstallrails

rdoc--op/usr/local/lib/ruby/gems/1.9.1/doc/rails-3.2.5/rdoclib--titlerails-3.2.5Documentation--quiet

file'lib'notfound

解决方法:

$geminstallrails--no-ri--no-rdoc

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