CentOS modification time tutorial

CentOS modification time tutorial

When we use CentOS, we find that the bios system time is incorrect. How can we modify this time?
The method is as follows:

[Root @ alvin ~] # Hwclock--show # display the current bios time

Sunday, June 17, June 28, 2015-28 seconds-0.826052 seconds

[Root @ alvin ~] # Date # display the current time

Tuesday, June 30, 2015 16:32:03 CST

[Root @ alvin ~] # Hwclock--systohc # synchronize bios with the current time (--hctosys indicates that bios time is used for synchronization)

[Root @ alvin ~] # Hwclock--show

Tuesday, June 30, 2015 31 seconds-1.040833 seconds

[Root @ alvin ~] # Date

Tuesday, June 30, 2015 16:33:41 CST

[Root @ alvin ~] #

The method for modifying the current time is as follows:

[Root @ alvin ~] # Date-s 06/18/15 # change the date to June 18, 2015

Thursday, June 18, 2015 00:00:00 CST

[Root @ alvin ~] # Date

Thursday, June 18, 2015 00:00:11 CST # Note: The time is 00:00:11.

[Root @ alvin ~] # Date-s 14:20:50 # change the time To 14:20:50

Thursday, June 18, 2015 14:20:50 CST

[Root @ alvin ~] #