topic Re: syn. system time in Operating System - HP-UX

syn. system time

peterchu — Thu, 08 Apr 2004 07:12:20 GMT

I want to syn. the system time on all hosts , I use rdate -s to get update the local system time on linux system, could suggest how to do it at UNIX system ? thx.

Re: syn. system time

Sunil Sharma_1 — Thu, 08 Apr 2004 07:14:11 GMT

Hi,

Best way to configure ntp on your network.

Configure one server as time server or NTP server and other should be NTP client.

Sunil

Re: syn. system time

Sanjay Kumar Suri — Thu, 08 Apr 2004 07:17:52 GMT

As Sharma suggested NTP is the best suited for HP-UX systems in networking environment to synchronize time.

HP-UX uses a network time service bundled with the OS called Network Time Protocol (NTP) and is used to synchronize system times in the network. The xntpd daemon is used to implement this feature. NTP is configurable through the command line or through SAM.

sks

Re: syn. system time

Victor Fridyev — Thu, 08 Apr 2004 07:43:28 GMT

Hi,

In order to synchronize HPUX machine with another one, use the following command :
/usr/sbin/ntpdate -b hostname.
If you need constant synchronization, edit the the following files: /etc/ntp.conf (according to the explanations in it) and and /etc/rc.config.d/netdaemons and update the following:
export NTPDATE_SERVER=hostname
export XNTPD=1

Run
/sbin/init.d/xntpd stop
/sbin/init.d/xntpd start

BTW, all this stuff can be done from SAM

Re: syn. system time

peterchu — Thu, 08 Apr 2004 07:50:19 GMT

thx replies, I have a unix server , how to get the system time from a linux server ( just like the rdate command on the linux ) ? thx much.

Re: syn. system time

Elmar P. Kolkman — Thu, 08 Apr 2004 08:13:31 GMT

Linux has xntp as well... I would suggest running it on those as well, with one or two as 'timeservers' and the rest trying to sync to it.

Also, I would recommend NOT to use ntpdate, or use the capital B option, to make sure the time is synced but does not make timejumps. Software sometimes doesn't like timejumps, especially timejumps back in time. By using '-B', the clock is synced by adjusting the speed at which the system clock runs. You could put a ntp server name in /etc/rc.config.d, but mind that the clock is then adjusted with a jump every time you start the ntp daemon by using the script in /sbin/init.d !