chrony lan - OT -_-

[poma]

On 05.01.2015 10:41, Bob Goodwin wrote:
> 
> On 01/05/15 01:43, Tim wrote:
>> Allegedly, on or about 04 January 2015, Bob Goodwin sent:
>>>> But I could have two crony/NTP servers no? In addition to box10 I
>>>> could make box7 an ntp server and list both in the clients
>>>> configuration file?
>> Yes, that's actually a good idea.  If you already have two PCs
>> consulting the outside world for time, make them servers on your LAN,
>> and let your clients use them.  That lets your clients get time from
>> either server, if one of them isn't available for some reason.
>>
>> A NTP client really should consult several NTP servers (some say at
>> least four), and those servers should consult more than one server, too
>> (unless they are*the*  master server with an atomic clock, etc).  Some
>> math is done to work out the differences/delays between multiple
>> servers, to work out which servers are closer up the chain to a master
>> server, and your own clock's inaccuracies, and your client does its
>> trick as it sees best based on that information.
> 
> Crony/ntp appears to be giving the expected results this morning after 
> being left to do whatever it does overnight and rebooting the client 
> again. So I conclude that although I can do systemctl restart chrony 
> that doesn't initiate an update of the system time correction? Not 
> knowing how to do that makes it difficult to test ...
> 
> [bobg at box10 ~]$ ssh -XC bobg at box48
> bobg at box48's password:
> Warning: No xauth data; using fake authentication data for X11 forwarding.
> Last login: Sun Jan  4 20:36:00 2015 from box10
> 
> "fake authentication" What's that about?
> 
> [bobg at box48 ~]$ chronyc sources
> 210 Number of sources = 1
> MS Name/IP address         Stratum Poll Reach LastRx Last sample
> ===============================================================================
> ^* box10                         2   6   377    42   -151us[-1713us] 
> +/-  321ms
> 
> This is the result with only one server, I wanted to see one working 
> before I confused things with a second unknown. It's interesting to note 
> that although it is configured to use 192.168.1.10 it correctly 
> identifies the ntp server as box10 which I assume it gets from /etc/hosts?
> 
> I found volumes written on ntp and chrony and the remarkable things it 
> can do but what I really need is some basic information, primarily how 
> to cause it to run a new time correction cycle so I can know if a 
> configuration change has done what I want it to do?
> 

$ system-config-date