ntp命令使用方法

ntp是什么

ntp 最原始的时间服务器

ntp install

yum install ntp ntpdate
systemctl enable ntpd && systemctl restart ntpd

ntp config server

# vi /etc/ntp.conf
server cn.pool.ntp.org prefer
restrict 192.168.1.1 mask 255.255.255.0 nomodify

server  127.127.1.0     # localclock
fudge   127.127.1.0 stratum 10

# restart service
systemctl enable ntpd && systemctl restart ntpd 

ntp config client

# vi /etc/ntp.conf
server cn.pool.ntp.org prefer

# restart service
systemctl enable ntpd && systemctl restart ntpd

ntp check

ntpq -p

crontab sync

#vi /etc/crontab
*/5 * * * * root ntpdate -s 192.168.1.1 ; hwclock -w