[root@www abc]# vim /usr/local/apache2/conf/extra/httpd-vhosts.conf
    DocumentRoot "/data/www"
    ServerName www.qq.com
    ServerAlias www.aqq.com
  #  ErrorLog "logs/dummy-host.example.com-error_log"
  #  CustomLog "logs/dummy-host.example.com-access_log" common

  #users ren zheng

<Directory /data/www/abc> //用户认证

  AllowOverride AuthConfig
  AuthName "qqx"
# AuthUserFile /data/.htpasswd
  AuthType Basic
  AuthUserFile /data/.htpasswd
  require valid-user

</Directory>

<IfModule mod_rewrite.c>  //域名跳转301

RewriteEngine on

RewriteCond %{HTTP_HOST} ^www.qq.com$

RewriteRule ^/(.*)$ http://www.xx.com/$1 [R=301,L]
</IfModule>

</VirtualHost>

添加多个虚拟主机时，servername  要不同，才能访问