Centos DNS启动出现Generating /etc/rndc.key:的解决方法

使用rndc-confgen -r /dev/urandom -a命令即可解决：

[root@localhost ~]#rndc-confgen -r /dev/urandom -a
wrote key file "/etc/rndc.key"
[root@localhost ~]# service named start
Starting named:                      [ OK ]