title: ERROR: Could not find a valid gem 'rails' (>= 0) in any repository
body: <p>Trying to install rails 3.2.7.
  Still stuck with the problems of rvm etc.</p>
  
  <pre><code>gem install rails
  </code></pre>
  
  <p>fetches me following :-</p>
  
  <blockquote>
    <p>ERROR:  Could not find a valid gem 'rails' (>= 0) in any repository</p>
  </blockquote>
  
  <p>How can I get rails 3.2.7 up and working in my system?</p>