title: Ubuntu 'Failed to restart apache2.service: Unit apache2.service not found.'
body: <p>I am using Google Cloud Platform to test out ModSecurity and I am using a tutorial to launch it. However, I need to restart Apache every once in a while. I'm using Ubuntu 18.04. I write <code>sudo systemctl restart apache2</code>, but an error comes back and it says <code>Failed to restart apache2.service: Unit apache2.service not found</code>. What should I do?</p>