similar to: NTP and hardware clock

Is there a package to do this? Normally the hardware clock is set during shutdown if one is running ntpd. But if a long-running server shuts down unexpectedly, this isn't done, and the hardware clock might be off by a lot when it comes back up. So setting it periodically from a cron job could be useful. What do others do? Adding a one liner to /etc/cron.daily that invokes

Hey, I have rather new installation of xen, dom0 is running ntpd and is perfectly in time. All domU''s are ~23s in future. Running ntpd on the domU''s seem to have no effect, /proc/sys/xen/independent_wallclock appears to have no effect. I''m running xen-unstable and 2.6.16-rc4 in AMD64 box. Any tip would be appricated. Thanks, -- ++ytti

Hey all, I was watching some logs on a domU today and i suddenly noticed that the timestamps were off by something on the order of 47 seconds. I was surprised because *I don''t* run independent wall clocks. I checked some other domUs and the "drift" was also very close to that of the first domU. I also checked another dom0, Here the domUs were "only" out of sync by

Hi. I run peridocally (from cron) on all of my machines 30 * * * * root /sbin/hwclock --systohc All of those machines in question take their time via NTP from the same local server, and that server gets its time from a ntp pool. Now I had to reboot a couple of them two days ago and to my surprise all had problems with the time upon booting. Here are the important files: [root at XXXXXX ~]

Hi, using SLES10 I''m unable to synchronize the time of DomU with that of Dom0. There is a persistent offset of about 3 seconds! Here''s a small history (not actual output): remote refid st t when poll reach delay offset jitter rkdvmso1.dvm.kl 192.168.0.11 5 u - 64 1 0.136 -2977.1 0.099 *rkdvmso1.dvm.kl 192.168.0.11 5 u 2 64

Hi, the date jumps within 30 seconds to a wrong value. ntp service is stopped at the beginning. Whereas hwclock seems more precise. [root at kerio ~]# service ntpd stop Shutting down ntpd: [ OK ] [root at kerio ~]# ntpdate 0.centos.pool.ntp.org 13 Mar 07:04:48 ntpdate[23003]: step time server 131.234.137.24 offset -3450.678273 sec [root at

Hi, I would like to sync my CentOS 6.3 hardware clock time to my NTP server's time. Can I do that without reboot the hosts? If yes, it would be great if anyone of you can provide me steps to do that. I am newbie in CentOS. Thanks, Anand Singh

https://bugzilla.samba.org/show_bug.cgi?id=4168 Summary: Random file has vanished when syncing clock with ntpdate/hwclock ? Product: rsync Version: 2.6.4 Platform: x86 OS/Version: Linux Status: NEW Severity: major Priority: P3 Component: core AssignedTo: wayned@samba.org

Hi, To get my system on time, I usually issue these two commands: # ntpdate de.pool.ntp.org # hwclock -w And when I want this to be done on startup, I put the two lines in rc.local. I wonder if this is an orthodox way to do things. Or is there something more appropriate? Niki Kovacs

Hi List I have ntp running as a service on a PC, with the expectation that it would keep time in synch to my ntp server. However, while I can manually update the time using "ntpdate -u ...", I find that if I manually force the wrong time, the ntpd service does not automatically re-synch the system time with the ntp server: - Current time: [admin at lol ~]# date Wed Jan 27 10:54:21

Running CentOS 3.4, I enabled the ntpd service and noticed that it opens up a hole in the firewall for ntp from 127.127.1.0. I look in the ntpd initscript and see that it's reading in servers from /etc/ntp/step-tickers. However, that file is empty... /etc/ntp/ntpservers contains clock.redhat.com and clock2.redhat.com, but ntpservers isn't used *anywhere*. This looks like a bug, but

Hello, in system-config-date i have checkbox synchronize date before service startup. Which config switch,file does it affect? I want to turn it on on my CentOS machine without xauth , just editing config files , i was hoping it could be in /etc/sysconfig/ntpd but no. Thanks in advance! D. -------------- next part -------------- An HTML attachment was scrubbed... URL:

OK, So what you people say is : 1. Run "ntpdate" during startup only once 2. After that, keep time with ntpd Right ? Regards, spyros ---- "I merely function as a channel that filters music through the chaos of noise" - Vangelis

Hallo, I am running dovecot on a PC (a workstation) to have a mail client independent storage for my mails. Now I would like to have the system clock set correctly by using ntpd or ntpdate (using debian/sid). The problem is, that the PC is not online at boot time, but is set online on demand manually using "pon" to start the pppd later. So ntpd cannot sync the time on boot time

Hello ! Just a quick question about time synchronization between xen dom0 and domUs... We''re running Xen 3.1 64-bit, with 32 and 64 bits linux guests. It''s up since 89 days and the domU''s time is around 5 minutes behind the dom0, which is updated via ntpdate... Any idea why it doesn''t sync the guests even that /proc/sys/xen/independent_wallclock is 0 ?

On 05/02/17 16:15, Richard wrote: > >> Date: Sunday, February 05, 2017 10:26:05 -0500 >> From: Robert Moskowitz <rgm at htt-consult.com> >> >> I have read: >> http://thegeekdiary.com/centos-rhel-7-chrony-vs-ntp-differences-bet >> ween-ntpd-and-chronyd/ >> >> My server is up all the time and will serve time to internal >> systems (via

Hi. Thanks for answering. Le 2015-09-23 17:34, Dominique Ramaekers a écrit : > Linux has two methods to use ntp: > > ntpdate: > It will run once at boot time to sync time. (This is probably > installed on your system) > It will not run after suspend and resume... => no correction Nope. This is not installed on my system. > ntpd: > Continuously adjusts time. The

The time appears to be perfect inside dom0, however all the domU''s tend to have a slightly faster date which gets further out of sync every day. I''m currently using Xen 3.0.3 with Gentoo Linux, under 3.0.2 I had no problems with domU clocks. Are there any known issues which could cause this? I''d strongly prefer not to run ntpd in every domU, having all domU clocks in

We encountered a problem with respect to KVM virtual host restore and NTP. Specifically, our VM test host was shutdown by an extended power outage and when power returned all of the restored guests were immediately shutdown by ntp because the time differential between the restored systems and that of the ntpd sync servers exceeded the panic threshold. This is not an acceptable situation so in the

I thought I'd play with making my system an ntp server. I did the "service ntpd start" it started OK. on my laptop I did "ntpdate IP" and it says no server for sync found. My firewall has open ntp:udp What did I miss? Thanks, Jerry