[ubuntu] Default Proxy Settings

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http://ubuntuforums.org – Dear All, I have a question about the default proxy settings for Ubuntu 13.10 or 12.04, Does Ubuntu come with default proxy server ! I am trying to install rails gem through Code: gem install rails but always ends with connection timed out error ! but the site rubygems.org is loaded by chrome browser !! I've tried also within live Ubuntu, I get the same error !!. So Does Ubuntu uses default proxy server for the terminal communications ? Thanks in advance -- Mina F. Beshay SW Engineer. (Hardware)