title: error during installing ruby on rails application uninitialized constant Gem::BasicSpecification (NameError)
body: <p>I am trying to install ruby on rails application fedena on Ubuntu server.</p>
  
  <p>It uses some old ruby library.  I followed the instructions on </p>
  
  <p><a href="http://paritosh.passion8.co.in/post/49878771105/fedena-installation-guide" rel="nofollow">http://paritosh.passion8.co.in/post/49878771105/fedena-installation-guide</a></p>
  
  <pre><code> gem install rubygems-update -v=1.3.7
  /usr/lib/ruby/vendor_ruby/rubygems/defaults/operating_system.rb:43:in `&lt;top (required)&gt;': uninitialized constant Gem::BasicSpecification (NameError)
          from /usr/local/lib/site_ruby/2.3.0/rubygems.rb:1113:in `require'
          from /usr/local/lib/site_ruby/2.3.0/rubygems.rb:1113:in `&lt;top (required)&gt;'
          from &lt;internal:gem_prelude&gt;:4:in `require'
          from &lt;internal:gem_prelude&gt;:4:in `&lt;internal:gem_prelude&gt;'
  </code></pre>