ubuntu-Apache2: Could not reliably determine the server’s fully qualified 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

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sudo
gedit
/etc/apache2/httpd.conf

在里面加上一行:

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ServerName localhost

注意httpd.conf默认是个空文件

关于Apache2的配置文件:

Ubuntu的Apache的配置文件是/etc/apache2/apache2.conf,Apache在启动时会自动读取这个文件的配置信息。而其他的一些配置文件,如httpd.conf等,则是通过Include指令包含进来。在apache2.conf中可以找到这些Include行:

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# Include module configuration:
 
Include /etc/apache2/mods-enabled/*.load
Include /etc/apache2/mods-enabled/*.conf
 
# Include all the user configurations:
Include /etc/apache2/httpd.conf
 
# Include ports listing
Include /etc/apache2/ports.conf
……
# Include generic snippets of statements
Include /etc/apache2/conf.d/
 
# Include the virtual host configurations:
Include /etc/apache2/sites-enabled/

结合注释,可以很清楚地看出每个配置文件的大体作用。当然,你完全可以把所有的设置放在apache2.conf或者httpd.conf或者任何一个配置文件中。Apache2的这种划分只是一种比较好的习惯。

安装完Apache后的最重要的一件事就是要知道Web文档根目录在什么地方,对于Ubuntu而言,默认的是/var/www。怎么知道的呢?apache2.conf里并没有DocumentRoot项,httpd.conf又是空的,因此肯定在其他的文件中。经过搜索,发现在/etc/apache2/sites-enabled/000-default中,里面有这样的内容:

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NameVirtualHost *
<VirtualHost *>
ServerAdmin webmaster@localhost
 
DocumentRoot /var/www/

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