title: updating the ruby gem 1.8.5
body: <p>hiii 
   i am trying to update my gem file. Current version of gem is 1.8.5 
  When i am trying to update it using command " gem install rubygems-update -v 1.8.5 " it is giving following error
  **</p>
  
  <blockquote>
    <p>ERROR:  While executing gem ... (Gem::RemoteFetcher::FetchError)
        SocketError: getaddrinfo: Name or service not known
    (http://rubygems.org/gems/rubygems-update-1.8.5.gem)</p>
  </blockquote>
  
  <p>**</p>
  
  <p>I am working on ubuntu 10.04</p>
  
  <p>also i tried to update using command " gem update --system "
  it is giving the error as below
  Updating rubygems-update
  **</p>
  
  <blockquote>
    <p>ERROR:  While executing gem ... (Gem::GemNotFoundException)
        Could not find a valid gem 'rubygems-update' (1.8.6) locally or in
    a repository</p>
  </blockquote>
  
  <p>**
  i also tried the solution given on the link <a href="http://lightyearsoftware.com/2009/07/updating-rubygems-to-recent-1-3-x/" rel="nofollow">http://lightyearsoftware.com/2009/07/updating-rubygems-to-recent-1-3-x/</a></p>
  
  <p>please help me to resolve the problem..</p>