[Solved] - Could not reliably determine the server's fully qualified domain name...

Error: 'AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1. Set the 'ServerName' directive globally to suppress this message, ubuntu 14.04'

Solution: 

In new version of apache2 you just following command like this:

 sudo nano /etc/apache2/apache2.conf  

Add the following new line end of file:

 ServerName localhost  

Then restart apache2:

 sudo nano service apache restart  

It's done!

Source: http://askubuntu.com/questions/256013/could-not-reliably-determine-the-servers-fully-qualified-domain-name