Updating and displaying CMOS clock

Victor Sudakov vas at mpeks.tomsk.su
Sun Jul 6 15:32:12 UTC 2014


What's the command to update the CMOS clock to the time of the kernel

ntpd does a good job of keeping the accurate time in the kernel clock,
but from my experience, this time is not propagated to the CMOS clock
which lives its own life. As a result, there is a large time skew
everytime the box is rebooted, which prevents from Kerberos login
until the kernel clock is synchronized.

In other words, what's the FreeBSD equivalent of the Linux 
"hwclock --systohc" command? 

And no, contrary to popular belief, the correction of the CMOS clock
does not happen automatically in FreeBSD even if ntpd is running.

If there is a way to display the time of the CMOS (RTC) clock, I
would be interested to know too.


Victor Sudakov,  VAS4-RIPE, VAS47-RIPN
sip:sudakov at sibptus.tomsk.ru

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