Re: [chrony-users] Does Chronyd update the hardware clock?

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Hello Bill,

Thank you for your quick and detailed reply.

> > I am trying to figure out if Chronyd updates the hardware clock.
> It can (writertc is the command in chronyc) but in general it does not. It
> measures the time and rate of the hardware clock in order to better use it to
> set the time next time the computer is switched on. Mind you, the rate is
> deternined while the computer is hot, while the error due to the rate not
> being equal to 1 sec/sec  occurs while the computer is off and cold, and thus
> the rate difference then is different from when it is hot. But the process is
> better than nothing.

I presume that the functionality described above has to do with
setting the "rtcfile" in chrony.conf. Instead of setting "rtcfile" if
"rtcsync" is used, then does chrony automatically update the hardware

I tested this by changing my system clock and hwclock to -2 mins. With
"rtcsync" and starting the chronyd process, it set the system clock
and the hwclock to the correct time. I just want to confirm that it is
expected behaviour.

The rest of you explanation makes perfect sense, Thanks for the
detailed explanation.

Thanks again,

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