I followed steps given in https://www.digitalocean.com/community/tutorials/how-to-install-nagios-4-and-monitor-your-servers-on-ubuntu-16-04. After following all the steps , Nagios service is running but when i tried to open UI i got message as The requested URL /nagios was not found on this server

These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.

1 answer


I believe that you have to enable the new Nagios Vhost that you’ve created. You could do that with:

sudo ln -s /etc/apache2/sites-available/nagios.conf /etc/apache2/sites-enabled/


a2ensite nagios

Then you need to do a quick Apache reload:

systemctl reload apache2


Submit an Answer