On Tue, March 6, 2007 11:25 am, James G. Sack (jim) wrote: > Lan Barnes wrote: >> On Mon, March 5, 2007 11:10 pm, John H. Robinson, IV wrote: >>> Ralph Shumaker wrote: >>>> Why not run the computers on Universal Time. Local time is only necessary for the people factor, right? >>> I know someone that does exactly that. The system time is UTC, and each >>> person can individually set their own TZ. I immediately saw the wisdom in that, but I don't see my shop changing anytime soon. >>> -john >> I know this is a problem on a dual boot (M$ insists on the clock being local), but have never had a problem with Linux on GMT in a mixed network. >> So that strikes me as ignorance on their part. > > Is everybody clear on whether they are talking about: > > hardware clock > (OS) system clock > > I have always understood that Windows maintained system clock = hardware clock, regardless of the timezone setting. This may be different these days. (By "maintain", I mean whenever set or synced). > > On a dual-boot system, therefore, I have always recommended that Linux use a hardware clock set to localtime (one of the installation options). > > On Linux, the above-mentioned installation setting (on Redhat-relatives, stored in /etc/sysconfig/clock) simply tells what offset to add [sub} when setting system clock from hardware clock [or vice versa]. > > On my workstation (and any system not dual-booted w/ Windows), I always use hardware clock on UTC, just 'cause it seems simpler. > > After the system clock is initialized (eg, on boot), the hardware clock has little to do with ongoing time operations. > > Regards, > ..jim >
I was clear (but thanks for the nice review). And when jhriv said "system time is UTC" I assumed he was clear on it and meant the time presented to the user. In the context of the post, I couldn't see what else he might have meant. Lan Barnes - using Red Hat since 782145871 seconds from a long time ago -- Lan Barnes SCM Analyst Linux Guy Tcl/Tk Enthusiast Biodiesel Brewer -- [email protected] http://www.kernel-panic.org/cgi-bin/mailman/listinfo/kplug-list
