在服务器上开启三个要虚拟主机/etc/httpd/conf/httpd.conf
<VirtualHost *:80>
DocumentRoot /var/www/aa
ServerName www.shi.com
</VirtualHost>
#
<VirtualHost *:80>
DocumentRoot /var/www/bb
ServerName www.bu.com
</VirtualHost>
#
<VirtualHost *:80>
DocumentRoot /var/www/cc
ServerName www.ming.com
</VirtualHost>