ubuntu 用 apt-get 安装 apache2 时会出现的错误

Ubuntu 中用 apt-get 安装apache2 ，重新启动会提示如下的错误：

apache2: 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

原因：没有默认的服务器名称

解决：

1. 打开 httpd.conf

2. 输入：Servername Localhost

3. 重启动apache2