title: How to uninstall rails with dependencies and documentation from gemset?
body: <p><strong>What I did:</strong></p>
  
  <p>I installed rails by mistake to the <strong>wrong gemset</strong>.</p>
  
  <pre><code>$ rvm use 1.9.3
  Using /home/username/.rvm/gems/ruby-1.9.3-p125
  $ gem env gemdir
  /home/username/.rvm/gems/ruby-1.9.3-p125
  $ gem install rails
  </code></pre>
  
  <p>It should have gone into the <strong>global gemset</strong>.</p>
  
  <pre><code>$ rvm use 1.9.3
  Using /home/username/.rvm/gems/ruby-1.9.3-p125
  $ rvm gemset use global
  Using ruby-1.9.3-p125 with gemset global
  $ gem env gemdir
  /home/username/.rvm/gems/ruby-1.9.3-p125@global
  $ gem install rails
  </code></pre>
  
  <hr>
  
  <p><strong>Questions:</strong></p>
  
  <ol>
  <li>How can I uninstall the whole list of gems installed with rails as well as rdoc and ri without affecting other gems installed in the same gemset? Can I also clean the <code>cache/</code> folder in the same step?</li>
  <li>As far as I understood it is best practice to install common gems
  into the <strong>global</strong> gemset, while project specific gems will go into
  the specific gemset of that project. Is that correct?</li>
  <li>By the way, what is the "wrong" gemset under <code>/home/username/.rvm/gems/ruby-1.9.3-p125</code> good for anyways?</li>
  </ol>
  
  <p>I am aware of similar questions like these.</p>
  
  <ul>
  <li><a href="https://stackoverflow.com/questions/3001425/uninstall-rails-3-with-dependencies">Uninstall Rails 3 with dependencies?</a></li>
  <li><a href="https://stackoverflow.com/questions/4007074/uninstalling-rails-and-gems-getting-error-cannot-uninstall-check-gem-list-d">Uninstalling rails and gems, getting error &quot;cannot uninstall, check &#39;gem list -d ...&#39;</a></li>
  <li><a href="https://stackoverflow.com/questions/3016939/how-to-completely-uninstall-rails-3-0-0-beta3-and-all-its-dependencies">How to completely uninstall rails 3.0.0.beta3 and all its dependencies?</a></li>
  <li><a href="https://stackoverflow.com/questions/2430059/how-do-i-completely-uninstall-rails-ruby-and-rubygems">How do I completely uninstall rails, ruby and rubygems?</a></li>
  </ul>
  
  <p>Though, I do not want to reinstall or update rails. I simply want to remove it from that particular gemset.</p>
  
  <hr>
  
  <p><strong>Approximation / question 1:</strong></p>
  
  <p>I only found <a href="https://stackoverflow.com/questions/4693445/rvm-uninstalling-all-gems-of-a-gemset">an answer</a> to the first question. Thus, it does not remove rails and its dependencies but <strong>all gems</strong>. This is what I did following the example given. I left off the name since there is no specific name, as far as I understand.</p>
  
  <pre><code>rvm use 1.9.3
  Using /home/username/.rvm/gems/ruby-1.9.3-p125
  rvm gemset empty
  </code></pre>
  
  <p>This removed the files under <code>doc/</code> and <code>gems/</code>. However, the <code>cache/</code> folder is <a href="http://pastebin.com/0v4GEc5n" rel="nofollow noreferrer">still filled</a>.</p>