title: Confusion about rake assets:clean / cleanup on the asset pipeline in rails
body: <p>Could somebody explain to me what the command <code>rake assets:clean</code> really does? Unfortunately the Rails Guides dont mention it. There is also the command <code>rake assets:cleanup</code>. Whats the difference?</p>
  
  <p>Furthermore could somebody tell me when do I have to run <code>rake assets:precompile</code> in production. Do I run it on the server console after I deployed all my application files to my production server? Or do I <code>precompile</code> on my local machine and then do a deploy of all files?</p>
  
  <p>Thanks all</p>