[CentOS] tzdata, Greenwich zone: URGENT!

Guy Boisvert boisvert.guy at videotron.ca
Wed Jun 4 14:49:03 UTC 2008

Johnny Hughes wrote:
> I use UTC
> make sure that the file /etc/sysconfig/clock says this:
> #---start cut
> UTC=true
> ARC=false
> #---end cut
> Copy the file /usr/share/zoneinfo/UTC to /etc/localtime
> set the time via an ntp server with the command (if ntp is installed):
> ntpdate -s 0.centos.pool.ntp.org
> Then you should always be at the correct time.
> NOTE:  If you do not have the correct time zone in the 
> /etc/sysconfig/clock file then on the next update, you will get the 
> reset to the timezone that is there and not the one you manually copied in.
> The UTC time zone is also available on install as a selection.
> Thanks,
> Johnny Hughes

Thanks Johnny!  Great info.

	I edited the /etc/sysconfig/clock file and did what you said.  I did 
also: cp -p /usr/share/zoneinfo/UTC /etc/localtime.  I'll probably 
schedule a reboot, just to be sure all is clean.  NTPd is already running.

	Checking /usr/share/zoneinfo/, i saw GMT, GMT0, GMT-0, GMT+0, UTC & 
Greenwich.  Does anybody knows the differences between all these or 
could provide a link to a reference?  I found some infos but nothing 
that explains the subtlety.

	I made a diff and they are binary different.  I just want to understand 
better what happened to us and the "time" thing!


Guy Boisvert, ing.
IngTegration inc.

More information about the CentOS mailing list