title: Remove ruby gems from /usr/bin after rvm install
body: <p>I recently installed <code>rvm</code> and uninstalled my Debian's <code>ruby1.8</code>, though I think <code>ruby2.1</code> is still installed. I am left with a lot of executables in /usr/bin and /usr/local/bin from (I think) debian's ruby. How can I delete those?</p>
  
  <p>When I use <code>gem uninstall</code>, rvm is used, and thinks I want to remove the gems from <code>~/.rvm/...</code>. Also, I sometimes have problems, like when invoking rake:</p>
  
  <pre><code>/usr/bin/env: ruby1.9.1: No such file or directory
  </code></pre>
  
  <p>which, by the way, is not to be found (first) found where it should be:</p>
  
  <pre><code>$ whereis rake
   &gt; rake: /usr/bin/rake2.1 /usr/local/bin/rake /home/user/.rvm/gems/ruby-2.1.5/bin/rake /home/user/.rvm/rubies/ruby-2.1.5/bin/rake
  </code></pre>
  
  <p>Can I simply <code>rm -rf</code> the gems in <code>/usr/bin</code> and <code>/usr/local/bin</code>, and other ruby locations (except for <code>~/.rvm/**</code>)? What else is leftover from the defunct ruby install?</p>
  
  <p>Thanks for your help.</p>