[ntp:questions] ntpd oddness
Unruh
unruh-spam at physics.ubc.ca
Tue Apr 1 23:32:44 UTC 2008
John Oliver <joliver at john-oliver.net> writes:
>I'm having a small issue with ntp-4.2.0.a.20040617-6.el4 running under
>Red Hat Enterprise Linux 4 update 5.
>In the Kickstart script to configure the server, I specify:
>timezone --utc GMT/London
No idea what the timezone script does.
cp /usr/share/zoneinfo/GMT/London /etc/localtime
chmod a+r /etc/localtime
>After the installation is done:
>[joliver at 0123456789-VCS ~]$ date
>Tue Apr 1 17:03:23 EDT 2008
>/etc/localtime is a real file:
The wrong one apparently.
>[joliver at 0123456789-VCS ~]$ ls -l /etc/localtime
>-rw-r--r-- 1 root root 1267 Jan 31 2007 /etc/localtime
>If I remove that file and replace it with a symlink:
>[joliver at 0123456789-VCS ~]$ ls -l /etc/localtime
>lrwxrwxrwx 1 root root 23 Apr 1 21:04 /etc/localtime ->
>/usr/share/zoneinfo/GMT
>The system clock displays correctly:
>[joliver at 0123456789-VCS ~]$ date
>Tue Apr 1 21:05:09 GMT 2008
>But, now, the hwclock is always 12 hours off:
I guess you forgot to put the hardware clock on utc.
>[joliver at 0123456789-VCS ~]$ /sbin/hwclock
>Tue 01 Apr 2008 09:05:39 PM GMT -0.323329 seconds
>[joliver at 0123456789-VCS ~]$ sudo /sbin/hwclock --systohc
>[joliver at 0123456789-VCS ~]$ /sbin/hwclock
>Tue 01 Apr 2008 09:05:52 PM GMT -0.776568 seconds
>1) Why is /etc/localtime a file by default instead of a symlink? Is
Because /usr may not be mounted when something needs the time on intial
bootup.
>this just some silly Red Hat-ism that has to be avoided?
No it is a good idea. A link could point to nowhere.
>2) Why is my hardware clock 12 hours off from the system clock?
How do we know. Make sure it is set to utc and reset it.
(look in /etc/sysconfig/clock)
>--
>* John Oliver http://www.john-oliver.net/ *
>--
>Posted via a free Usenet account from http://www.teranews.com
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