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解决[warn] _default_ VirtualHost overlap on port 80, the first has precedence问题
在apache2的httpd.conf里新增加了1个VirtualHost，域名是www.ligh.com，此时，服务器总共2个VirtualHost ，apachectl restart的时候却出现了下面的警告提示：
[warn] _default_ VirtualHost overlap on port 80, the first has precedence
大概意思就是说后面新增加的这个VirtualHost 由于端口被占用，不能生效，沿用第一个虚拟主机的配置。 www.2cto.com
检查了一下，发现，原来在httpd.conf里，我没有把#NameVirtualHost *:80前的注释去掉，导致这个没有生效。
去掉#之后restart，问题解决，如果有https，则总体修改为
NameVirtualHost *:80
NameVirtualHost *:433
[root@localhost conf]# service httpd restart
Stopping httpd: [ OK ]
Starting httpd: [Wed Jul 16 06:52:43 2008] [warn] _default_ VirtualHost overlap on port 80, the first has precedence
[Wed Jul 16 06:52:43 2008] [warn] _default_ VirtualHost overlap on port 80, the first has precedence
[Wed Jul 16 06:52:43 2008] [warn] _default_ VirtualHost overlap on port 80, the first has precedence
[Wed Jul 16 06:52:43 2008] [warn] NameVirtualHost 124.254.31.4:80 has no VirtualHosts
看上面提示，发现了，apache虚拟主机出问题，警告：默认监听端口80上有重叠，在我们正常配置虚拟主机时，linux系统配置，XXX.conf 虚拟配置文件，一般都是默认访问在第一个站，表明虚拟主机没配置好。
解决方法：
编辑虚拟主机配置文件，改两处地方就可以了。
1.一处
NameVirtualHost *:80
2.二处
<VirtualHost *:80>
DocumentRoot /home/wwwroot/
ServerName xxx.com
[root@localhost conf]# service httpd restart
Stopping httpd: [ OK ]
Starting httpd: [ OK ]
[warn] _default_ VirtualHost overlap on port 80, the first has precedence
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原文地址：http://www.cnblogs.com/xyh592/p/5762729.html
