title: How do I run systemctl restart apache2 in AWS Ubuntu when it requires a password
body: <p>I am trying to restart Apache and I get...</p>
  
  <pre><code>ubuntu@ip-172-xx-xx-xx:~$ systemctl restart apache2
  ==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-units ===
  Authentication is required to restart 'apache2.service'.
  Authenticating as: Ubuntu (ubuntu)
  </code></pre>
  
  <p>This is a brand new instance and I never set the ubuntu user password. Is there a default password set on instance creation?</p>
  
  <p>How do I restart apache in AWS Ubuntu?</p>