RHEL6配置好dns服务之后，会出现如下问题，rndc无法找到key，named服务跑的是正常的，其实本也可以用，但是本着不能放过一个问题的原则，找到了解决办法
[root@server named]# /etc/init.d/named status
rndc: neither /etc/rndc.conf nor /etc/rndc.key was found
named (pid 4086) is running...
[root@server named]# rndc status
rndc: neither /etc/rndc.conf nor /etc/rndc.key was found
提示没有rndc.key，主要原因还是在RHEL6上没有caching-named这个包了，EL5上是把key包含在里面的。所以我们要手动创建key
1）创建key
[root@server named]# rndc-confgen -r /dev/urandom -a
wrote key file "/etc/rndc.key"
2）更改权限
[root@server named]# rndc status
rndc: connect failed: 127.0.0.1#953: connection refused
[root@server named]# cat /etc/rndc.key
key "rndc-key" {
algorithm hmac-md5;
secret "MEARtiTMJzFfRwBKlY5lpQ==";
};
[root@server named]# ls -l /etc/rndc.key
-rw------- 1 root root 77 May 1 06:57 /etc/rndc.key
[root@server named]# chown root:named /etc/rndc.key
[root@server named]# chmod 644 /etc/rndc.key
[root@server named]# rndc status
rndc: connect failed: 127.0.0.1#953: connection refused
重启named服务！
3）验证
[root@server named]# /etc/init.d/named restart
Stopping named: . [ OK ]
Starting named: [ OK ]
[root@server named]# /etc/init.d/named status
version: 9.7.3-P3-RedHat-9.7.3-8.P3.el6
CPUs found: 1
worker threads: 1
number of zones: 21
debug level: 0
xfers running: 0
xfers deferred: 0
soa queries in progress: 0
query logging is OFF
recursive clients: 0/0/1000
tcp clients: 0/100
server is up and running
named (pid 4224) is running...
[root@server named]# rndc status
version: 9.7.3-P3-RedHat-9.7.3-8.P3.el6
CPUs found: 1
worker threads: 1
number of zones: 21
debug level: 0
xfers running: 0
xfers deferred: 0
soa queries in progress: 0
query logging is OFF
recursive clients: 0/0/1000
tcp clients: 0/100
server is up and running