apache2: Could not reliably determine the server's fully qualified domain name

 apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName

问题情况：

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$ sudo /etc/init.d/apache2 restart
* Restarting web server apache2
apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName

解决步骤：
为了解决这个问题，你需要编辑下面这个httpd.conf文件，打开它并根据如下操作进行编辑：

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sudo gedit /etc/apache2/httpd.conf

默认的httpd.conf是个空文件，现在向里面加入如下内容：

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ServerName localhost

这里可以改成自己网站域名如www.baidu.com

保存并退出。

最后重启服务器：

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sudo /etc/init.d/apache2 restart

http://blog.csdn.net/firstboy0513/article/details/5866133