title: Bash: pip: command not found for install (SYMFONY3)
body: <p>When I try this command in CLI(Symfony 3)  </p>
  
  <pre><code>pip install --upgrade httpie 
  </code></pre>
  
  <p>I get this error:</p>
  
  <blockquote>
    <p>bash: pip: command not found</p>
  </blockquote>
  
  <p>What do I have to do to get rid of this error?</p>