Set system time and Network Time Synchronization in ubuntu

In ubuntu, System Time and network Time synchronization are divided into System Clock (System Time) and Real Time Clock (hardware Time, RTC for short ). System time: the time in the current Linux Kernel. Hardware time of www.2cto.com: Time When battery power is available on the motherboard. Command for viewing system time: # date command for setting system time: # date-set (month/day/year hour: minute: Second) Example: # date-set "10/11/10" command for viewing hardware time: # hwclock command for setting hardware time: # hwclock-set-date = (month/day/year: minute: Second) the above mentioned is to manually set the time to a time point, which may be different from the current network time. The following describes how to synchronize time with the time server: www.2cto.com 1. install ntpdate tool # sudo apt-get install ntpdate 2. set system time and Network Time Synchronization # ntpdate cn.pool.ntp.org 3. write System Time to hardware time # hwclock -- systohc