0293. [CentOS] NTP 시간서버 설정

띠앗머리 2016. 1. 28. 17:16

yum install ntp

[root@hodany ~]# vi /etc/ntp.conf

# Use public servers from the pool.ntp.org project.

#server 0.centos.pool.ntp.org

#server 1.centos.pool.ntp.org

#server 2.centos.pool.ntp.org

server kr.pool.ntp.org

server ntp.postech.ac.kr

server ntp.xbsd.kr

[root@hodany ~]# ntpdate kr.pool.ntp.org

13 Sep 07:24:39 ntpdate[8854]: step time server 143.248.25.208 offset 210238386.941157 sec

[root@hodany ~]# service ntpd start

Starting ntpd: [ OK ]

[root@hodany ~]# chkconfig ntpd on

[root@hodany ~]# ntpq -p

remote refid st t when poll reach delay offset jitter

========================================================================

211.233.78.116 158.108.212.157 3 u 7 64 1 2.280 -2.294 0.000

ntp.postech.ac. .GPS. 1 u 7 64 1 10.375 -1.243 0.000

121.182.147.191 .GPS. 1 u 7 64 1 6.794 -0.378 0.000

10분정도 후 * + 가 표시되며 NTP 서버와 시간 동기화가 된다

[root@hodany ~]# ntpq -p

remote refid st t when poll reach delay offset jitter

========================================================================

+211.233.78.116 158.108.212.157 3 u 28 64 77 2.220 -8.283 3.685

*ntp.postech.ac. .GPS. 1 u 35 64 77 10.278 -6.339 2.872

+121.182.147.191 .GPS. 1 u 30 64 77 6.522 -6.484 3.793