在其他机器配置dns好像没有在ubuntu上面这么麻烦
配置好后出错
Aug 12 16:14:49 dnsbackup named[5816]: dumping master file: /etc/bind/tmp-T5nWPaldMq: open: permission denied
Aug 12 16:14:49 dnsbackup named[5816]: transfer of 21pt.com/IN' from 10.1.1.1#53: failed while receiving responses: permission denied
Aug 12 16:15:01 dnsbackup named[5816]: dumping master file: /etc/bind/tmp...