Ubuntu下Apache重启错误:Could not reliably domain name

在Ubuntu上装完Apache后，每次启动apache服务器都会得到如下警告：

apache2: Could not reliably determine the server’s fully qualified domain name, using 127.0.0.1 for ServerName

解决办法也很简单：
sudo echo ServerName localhost >> /etc/apache2/httpd.conf
或者

sudo gedit /etc/apache2/httpd.conf

在里面加上一行：

ServerName localhost

注意httpd.conf默认是个空文件