zabbix 对/etc/ssh/sshd_config文件的监控 但status为unknowen

原因为该文件没有被访问的权限：

# ll /etc/ssh/sshd_config
-rw------- 1 root root 3891 Apr 20 10:09 /etc/ssh/sshd_config

授权后再看：

[root@86 ~]# chmod +r /etc/ssh/sshd_config
[root@86 ~]# ll /etc/ssh/sshd_config
-rw-r--r-- 1 root root 3891 Apr 20 10:09 /etc/ssh/sshd_config

过几秒刷新后问题解决！！！

 Configuration----->Hosts-------->Host list----->目标机-----TrIgger

Name:/etc/ssh/sshd_config has been changed on {HOST.NAME}

Expression:{86:vfs.file.cksum[/etc/ssh/sshd_config].diff()}=1