17.4 Hardware Clock

$ sudo hwclock --verbose
hwclock from util-linux 2.36
System Time: 1616446079.647893
Trying to open: /dev/rtc0
Using the rtc interface to the clock.
Assuming hardware clock is kept in UTC time.
Waiting for clock tick...
...got clock tick
Time read from Hardware Clock: 2021/03/22 20:48:00
Hw clock time : 2021/03/22 20:48:00 = 1616446080 seconds since 1969
Time since last adjustment is 1616446080 seconds
Calculated Hardware Clock drift is 0.000000 seconds
2021-03-23 07:47:59.611119+11:00

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