问题
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 (http://rubygems.org/gems/activesupport-2.3.8.gem)
回答1:
rubygems.org is down right now. Try again later.
来源：https://stackoverflow.com/questions/2995125/unable-to-update-gems-on-mac-osx-gemremotefetcherfetcherror