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
出现以上情况只要修改一下Apache的配置文件即可：
在配置文件 apache2.conf里面加入一行
ServerName localhost:80
然后重启Apache服务就可以了
sudo /etc/init.d/apache2 restart
Apache2启动错误Could not reliably determine the server's fully qualified domain name
原文：http://www.cnblogs.com/rencm/p/6928255.html