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 ntpdntp 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 ntpdntp check
ntpq -pcrontab sync
#vi /etc/crontab
*/5 * * * * root ntpdate -s 192.168.1.1 ; hwclock -w
