时间同步Servname not supported for ai_socktype

rdate -s 129.7.1.66
rdate: 129.7.1.66: Servname not supported for ai_socktype

ntpdate 0.centos.pool.ntp.org
Error : Servname not supported for ai_socktype
14 Mar 15:24:00 ntpdate[19681]: can't find host 0.centos.pool.ntp.org

[root@JQ-other-host-221 ~]# ntpdate 202.112.10.36
Error : Servname not supported for ai_socktype
14 Mar 15:34:17 ntpdate[19760]: can't find host 202.112.10.36