技術標籤：linuxcentos

1、date命令檢視當前系統時間和網際網路時間

相差大概16秒
2、安裝libopts25
rpm -ivh libopts25-5.18.12-1.64.x86_64.rpm
3、安裝ntpdate
rpm -ivh ntpdate-4.2.6p5-29.el7.centos.2.x86_64.rpm
4、安裝ntp
rpm -ivh ntp-4.2.6p5-29.el7.centos.2.x86_64.rpm
5、編輯ntp.conf檔案(vim /etc/ntp.conf)

driftfile /var/lib/ntp/drift
restrict -6 ::1
restrict default ignore
restrict 10.21.28.0 mask 255.255.255.0 notrap nomodify
server 10.21.28.240 #時鐘伺服器ip
fudge 10.21.28.240 stratum 8
includefile /etc/ntp/crypto/pw
keys /etc/ntp/keys
disable monitor
 

6、配置日誌檔案路徑(vim /etc/sysconfig/ntpd)
OPTIONS="-g -l /var/log/ntpstats/ntpd.log"
7、配置開機自啟動
chkconfig ntpd on
8、啟動ntpd服務
service ntpd start
5~10分鐘，即可完成時間同步