Re: Why touch the CMOS clock?

Bernd Eckenfels (
11 May 1996 17:55:28 GMT

Herbert Rosmanith ( wrote:
: After one or two weeks uptime, the interrupt clock had a drift of two hours,
: reported a friend of mine. We fixed this by "clock -r" every hour.
: I hope the kernel does *not* update the RTC itself , now does it ?

# -a Set the system time from the CMOS clock, adjusting
# the time to correct for systematic error, and writ-
# ting it back into the CMOS clock.

See the clock(8) for the usage of this feature. This will set the System
clock to the CMOS Clock after correcting systematic errors of the CMOS
Clock, and updating the CMOS Clock. The Kernel will not write its time into
the CMOS clock if synchronized this way.


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