Jon-MacBook-Pro:rubygems-1.3.7 jon$ sudo gem install rails
Password:
ERROR: While executing gem ... (Gem::RemoteFetcher::FetchError)
SocketError: getaddrinfo: nodename nor servname provided, or not known (https://rubygems.org/gems/activesupport-2.3.8.gem)
Jon-MacBook-Pro:rubygems-1.3.7 jon$ sudo gem in
阅读背景：
无法更新mac osx - Gem::RemoteFetcher::FetchError。
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