title: Revert Anaconda like the first time installed
body: <p>I have two environments created in <code>Users/user/conda/envs</code> which I don't need anymore. I saw that there is also <code>pkgs</code> in <code>Users/user/conda</code> and both of them <code>Users/user/conda/envs</code> and <code>Users/user/conda/pkgs</code> really eat a lot lot lot of my storage. I want to delete those two environment.</p>
  
  <ol>
  <li><p>Does <code>conda remove -n env_name --all</code> delete the environment and all its installed packages under its environment too? Or does it only delete the environment?</p></li>
  <li><p>Can I delete directly folder <code>pkgs</code> and <code>env</code> from <code>Users/user</code> without affect the <strong>base</strong> environment?</p></li>
  <li><p>How can one revert Anaconda like the first time installed (contain only <strong>base</strong> environment and the default packages)?</p></li>
  </ol>
  
  <p>Or do I need uninstall Anaconda and re-install it?</p>