title: Virtualenv - workon command not found
body: <p>I followed these steps to set up virtualenv + virtualenvwrapper:</p>
  
  <pre><code>$ sudo apt-get install python3-pip
  
  $ sudo pip3 install virtualenv
  $ sudo pip3 install virtualenvwrapper
  
  $ mkdir ~/.virtualenvs
  
  $ export WORKON_HOME=~/.virtualenvs
  
  $ VIRTUALENVWRAPPER_PYTHON='/usr/bin/python3'
  
  $ source /usr/local/bin/virtualenvwrapper.sh
  
  $ mkvirtualenv venv
  $ virtualenv venv
  </code></pre>
  
  <p>So far it was working fine but I restarted the shell and then I tried <code>workon venv</code> and now it says: <code>command not found</code></p>