pi@raspberrypi /var/www $ sudo /etc/init.d/apache2 restart
[....] Restarting web server: apache2apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName
 ... waiting apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName
. ok
pi@raspberrypi /var/www $ hostname -I
192.168.0.2 192.168.0.8