Wed Nov 24 00:34:05 2010] [warn] _default_ VirtualHost overlap on port 80, the first has precedence
搭建虚拟主机时候报错如上面所示：
解决：大概意思就是后面新增加的这个个VirtualHost 由于端口被占用，不能生效，沿用第一个虚拟主机的配置。
NameVirtualHost *:80 ######### 原来没有这行，添加后即可解决上述问题
#########################################################
<VirtualHost *:80>
    ServerAdmin webmaster@xxx.com
    DocumentRoot /data/www/xxxxx
    <Directory "/data/www/xxxxxx">
      AllowOverride All
      #Options MultiViews Includes
      OPtions All
      Order allow,deny
      Allow from all
    </Directory>
    ServerName www.xxx.com
#    ServerAlias www.cccdu.com
    ErrorDocument 404 /index.php
CustomLog "|/usr/local/sbin/cronolog /data/apache/logs/access_log69.%Y-%m-%d.log" combined
</VirtualHost>
##########################################################
<VirtualHost *:80>
    ServerAdmin webmaster@xxxxcom
    DocumentRoot /data/www/xxxxxx
    <Directory "/data/www/xxxxxx">
      AllowOverride All
      OPtions All
      Order allow,deny
      Allow from all
    </Directory>
    ServerName www.xxxx.com
</VirtualHost>