CentOS7安裝配置NTP服務centos
NTP服務是時間同步服務服務器
1. 安裝NTPd
[root@centos7 ~]# yum install -y ntpcentos7
[jack@centos7 ~]$ vi /etc/ntp.confspa
添加以下的代碼rest
restrict 192.168.0.0 mask 255.255.0.0 nomodify notrapserver
更改時間同步服務器rem
#server 0.centos.pool.ntp.org iburstcmd
#server 1.centos.pool.ntp.org iburst同步
#server 2.centos.pool.ntp.org iburstit
#server 3.centos.pool.ntp.org iburst
server ntp1.jst.mfeed.ad.jp iburst
server ntp2.jst.mfeed.ad.jp iburst
server ntp3.jst.mfeed.ad.jp iburst
[root@centos7 ~]# systemctl start ntpd
[root@centos7 ~]# systemctl enable ntpd
2. 設置防火牆，容許NTP服務使用123/UDP
[root@centos7 ~]# firewall-cmd --add-service=ntp –permanent
[root@centos7 ~]# firewall-cmd –reload
3. 驗證
[root@centos7 ~]# ntpq -p
remote refid st t when poll reach delay offset jitter
==============================================================================
*leontp.ccgs.wa. .GPS. 1 u 2 64 15 443.939 -3.250 4.178
+120.25.115.19 10.137.38.86 2 u 62 64 17 49.708 9.697 6.603
+ntp-sz.chl.la 202.118.1.46 2 u 59 64 17 41.490 13.642 5.630
-202.118.176.2 202.118.177.155 4 u 34 64 37 54.802 27.184 4.129