title: What's the difference between apt-get virtualenv and pip virtualenv?
body: <p>What's the difference between the virtualenv from apt-get and that from pip? Are they interchangeable?</p>
  
  <pre><code>apt-get install virtualenv
  
  The following extra packages will be installed:
    python-chardet-whl python-colorama-whl python-distlib-whl python-html5lib-whl python-pip-whl python-requests-whl
    python-setuptools-whl python-six-whl python-urllib3-whl python3-virtualenv
  The following NEW packages will be installed:
    python-chardet-whl python-colorama-whl python-distlib-whl python-html5lib-whl python-pip-whl python-requests-whl
    python-setuptools-whl python-six-whl python-urllib3-whl python3-virtualenv virtualenv
  </code></pre>