Towards the end of the install you will see this warning:
apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName
Although I’ll be going into some detail about the options and settings available in the main apache configuration file, let’s fix that warning straight away.
Open the main apache config:
sudo nano /etc/apache2/apache2.conf
At the bottom of the file add the following:
Change the ServerName to your Slice hostname or a FQDN (remember this demo Slice has a hostname of ‘demo’).
Once done, save apache2.conf and gracefully restart Apache (this method of restarting won’t kill open connections):
sudo apache2ctl graceful
Now the warning has gone. Nice.