Re: NTP.conf pool vs server
- Date: Thu, 8 Jun 2017 05:19:28 -0400
- From: Gene Heskett <gheskett@xxxxxxxxxxx>
- Subject: Re: NTP.conf pool vs server
On Thursday 08 June 2017 01:54:41 Teemu Likonen wrote:
> John Hasler [2017-06-07 10:30:54-05] wrote:
> > Remove Ntp and install Chrony.
> Or remove both of those and run:
> sudo timedatectl set-ntp true
> And that's about it.
And it looks like this may have solved my pi's clock problem. pi's do not
have a hardware clock, only a software clock.
My router keeps ntp time, and broadcasts it from time to time. And I'd
lie to use that broadcast to sync the rest of my home networks machines
as opposed to haveing nearly a dozen machines querying the internets
time servers at pool.ntp.net.
I see, after having stopped ntp, and issued the set-ntp true, htop shows
a couple copies of /lib/systemd/systemd-timesyncd running, clear at the
bottom of the sorted by cpu listing, and that issueing a timedatectl as
the user elicits this response:
pi@picncsheldon:/etc $ timedatectl
Local time: Thu 2017-06-08 03:38:58 EDT
Universal time: Thu 2017-06-08 07:38:58 UTC
RTC time: n/a
Time zone: America/New_York (EDT, -0400)
NTP enabled: yes
NTP synchronized: yes
RTC in local TZ: no
DST active: yes
Last DST change: DST began at
Sun 2017-03-12 01:59:59 EST
Sun 2017-03-12 03:00:00 EDT
Next DST change: DST ends (the clock jumps one hour backwards) at
Sun 2017-11-05 01:59:59 EDT
Sun 2017-11-05 01:00:00 EST
Which looks to me to have solved my problem on an armhf/jessie with a
realtime kernel, which I need to pin as the application cannot run with
a stock kernel.
I thank you very much. Works a treat on a pi/jessie install.
But for my wheezy machines, neither ntpd nor chrony has a listen to
address command that I can find. Chrony is working but its banging on
servers all over the planet. No better or worse than ntp IMNSHO.
Why can't it simply listen to the broadcasts my router is doing?
Perhaps an even better question is why, when I run chronyc as root,
everything I try to do except look at the stats, is a 501/denied return.
Isn't chronyc supposed to be the command and control facility?, but it
cannot control anything, only show sources and stats.
Thanks for any chrony as client clues shared.
Cheers, Gene Heskett
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>