title: Unable to locate package http, ubuntu 12.04
body: <p>I can install http just by call '<strong>apt-get install http</strong>' But I get the following error:</p>
  
  <p>Reading package lists... Done
  Building dependency tree<br>
  Reading state information... Done
  E: Unable to locate package http</p>
  
  <p>I also tried 'sudo apt-get install http'. no luck.</p>
  
  <p>My system is ubuntu 12.04.</p>