title: How to replace conda root environment with another environment?
body: <pre><code>lvtingbo@ubuntu:~$ conda env list
  # conda environments:
  #
  py3.6                    /home/lvtingbo/anaconda3/envs/py3.6
  root                  *  /home/lvtingbo/anaconda3
  </code></pre>
  
  <p>There are two Conda python environments in my Linux, one is root (the default env), another is py3.6. Now I want to delete root env and replace it with env py3.6 because I will never use root anymore. How can I realize it?</p>