запускаю вроде бы нормально Apache2.

sudo /etc/init.d/apache2 start
[sudo] password for alexandr:
* Starting web server apache2

restart выдает ошибку.

sudo /etc/init.d/apache2 restart
* Restarting web server apache2 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