Linux date time Settings sync command share

date command:

[

#date
Display system time

]

hwclock command (i.e. hardwareclock system hardware time)

[

#hwclock
Display hardware time
#hwclock -w
Writes the system time to the system hardware

]

ntpdate

ntpdate is an linux time synchronization service software. For detailed information, please refer to Baidu. There are many detailed information

Check to see if the ntpdate service is installed on your machine. If not, ask yum ES38en-ES39en ntpdate

Synchronization time

Enter ntpdate ES48en.nist.gov synchronization network time

Results :3 Jun 15:42:39 ntpdate[4721]: adjust time server 211.115.194.21 ES59en-0.005885 sec

The above results represent the success of time synchronization, which roughly means that the adjustment time is server 211.115.194.21, with a difference of -0.005885 seconds
If the above ES65en. nist. gov server cannot be synchronized, you can try the following time server:

[

time.nist.gov
time.nuri.net
0.asia.pool.ntp.org
1.asia.pool.ntp.org
2.asia.pool.ntp.org
3.asia.pool.ntp.org

]

Adjust hardware time after synchronization time is successful

#hwclock -w


After successful execution, check the system hardware time (barring any surprises, the actual time of date and hwclock is now internet time)

[

#date
#hwclock

]

Execute the above command, and the display time should be 1

Timed time synchronization tasks are performed, so we use ES110en-e to add timed tasks

/1 ntpdate time.nuri.net;hwclock -w

That is: # Synchronize 1 internet time every 1 hour and write to hardware