From: Jordi Massaguer Pla <jmassaguerpla@...>
Date: 2012-08-30T18:10:00+09:00
Subject: Re: can't install neither original nor green shoes


>
> WARNING:  Error fetching data: SocketError: getaddrinfo: Name or service
> not known (http://rubygems.org/latest_specs.4.8.gz)
hi

I once had a similar error and was a problem with the DNS  
configuration.  You can use the google ones

https://developers.google.com/speed/public-dns/

regards

jordi