title: Cannot install sprockets gem - ruby on rails
body: <p>I accidently uninstalled the sprockets gem in terminal using this command</p>
  
  <blockquote>
    <p>'gem uninstall sprockets 2.12.3'</p>
  </blockquote>
  
  <p>when I try to install it again with this command:</p>
  
  <blockquote>
    <p>'gem install sprockets 2.12.3'</p>
  </blockquote>
  
  <p>I get this message:</p>
  
  <blockquote>
    <p>'ERROR:  While executing gem ... (Gem::RemoteFetcher::FetchError)
        Errno::ETIMEDOUT: Operation timed out - connect(2) for "au-m.rubygems.org" port 443 (<a href="https://api.rubygems.org/quick/Marshal.4.8/sprockets-2.12.3.gemspec.rz" rel="nofollow">https://api.rubygems.org/quick/Marshal.4.8/sprockets-2.12.3.gemspec.rz</a>)'</p>
  </blockquote>
  
  <p>I was wondering if anyone knows what I need to do to rectify this problem?</p>
  
  <p>Many thanks.</p>