Linux Sync Time

There are 2 of times in Linux:

1. Hardware time
2. System time

These 2 times are not synchronous! If one day you find the system time is wrong, you can look at these 2 times. Hardware time written in the BIOS, the system time is the computer display time.

sudo  Hwclock-r2014 December 31 Wednesday 08:46 37 seconds   -0.214486 seconds

This displays the time of the hardware.

You can write time to the BIOS after you use Ntpdate to synchronize network time:

Synchronize Network time:

sudo  Time . windows.com   to £ ºntpdate[3935time64.4.  10.3341877.139623 sec

Write to BIOS:

sudo  Hwclock-w //write Biso

and look at the time now.
sudo  hwclock-r December 31, 2014 Wednesday 20:26 03 Sec.  -0.979207 seconds

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Linux Sync Time