Linux clock synchronization

Linux has 2 clocks, a hardware clock, and a system clock.

The date command sees the system time

Hwclock saw hardware time.

Hwclock-r #读取硬件时间 (-R can be omitted)

Hwclock-w #将系统时间写入到硬件

Hwclock-s #将硬件时间写入到系统

#下面为如何配置网络ntpdate更新

Yum install-y ntpntpdate time.windows.comhwclock-w# can be written directly to a timed task to ensure system time is accurate. echo "*/10 * * * * */usr/sbin/ntpdatetime.windows.com>/dev/null 2>&1" >>/var/spool/cron/rootecho "/sbin/ Hwclock-w>/dev/null 2>&1 ">>/var/spool/cron/root

Linux clock synchronization