Linux 's time is divided into System Clock (system time) and Real Time Clock (hardware time, referred to as RTC).
System Time: refers to the time in the current Linux Kernel.
Hardware time: battery supply on board.
Check the system time command: #date setting command system time: #date -set (month / day / year hours: minutes: seconds) Example: #date -set "10/11/10 10:15" View hardware time command: # hwclock hardware setting command time: # hwclock -set -date = (month / day / year: minutes: seconds) of the above-mentioned time is manually set to a point in time, there may be an error with the current network time . Here are some methods to synchronize the time on the time server
Ntpdate installation tool
yum -y install ntp ntpdate
Set the system time synchronized with the network time
ntpdate cn.pool.ntp.orgor => ntpdate -u ntp.api.bz
The system time to write hardware time
hwclock –w
4. Check the hardware
hwclock -show