Time synchronization from terminal

Is there a command from terminal to synchronize time? I need to do this from a shell script.
Thanks!

I believe you want ntpdate. There's also the query utility, ntpq. Use "man command" in the Terminal for the man pages.

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We have IOSXR 4.2.1 on routers CRS3 and ASR9K with all recomended SMUs; we need to configure the time synchronization for two NTP servers with the configuration below, but the routers became unstable; synchronize with one NTP servers for some time, then switch to other NTP server, and keep doing this. Anyone know why this behavior?
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Wed Jul 10 09:37:04.621 BRSPO
RP/0/RP0/CPU0:Jul 4 21:29:18 : ntpd[256]: %IP-IP_NTP-5-SYNC_LOSS : Synchronization lost : 10.192.32.32 : Peer unreachable or clock selection failed
RP/0/RP0/CPU0:Jul 4 21:29:18 : ntpd[256]: %IP-IP_NTP-5-HP_CONN_LOST : High priority NTP peer connection lost - Stratum 2->15.
RP/0/RP0/CPU0:Jul 4 21:29:18 : ntpd[256]: %IP-IP_NTP-5-ALL_CONN_LOST : All NTP peer connections failed.
RP/0/RP0/CPU0:Jul 4 21:29:27 : ntpd[256]: %IP-IP_NTP-5-HP_CONN_RECOVERED : High priority NTP peer connection recovered - Stratum 15->2.
RP/0/RP0/CPU0:Jul 4 21:30:21 : ntpd[256]: %IP-IP_NTP-5-SYNC_LOSS : Synchronization lost : 10.192.32.32 : Peer unreachable or clock selection failed
RP/0/RP0/CPU0:Jul 4 21:30:21 : ntpd[256]: %IP-IP_NTP-5-HP_CONN_LOST : High priority NTP peer connection lost - Stratum 2->15.
RP/0/RP0/CPU0:Jul 4 21:30:21 : ntpd[256]: %IP-IP_NTP-5-ALL_CONN_LOST : All NTP peer connections failed.
RP/0/RP0/CPU0:Jul 4 21:31:36 : ntpd[256]: %IP-IP_NTP-5-HP_CONN_RECOVERED : High priority NTP peer connection recovered - Stratum 15->2.
RP/0/RP0/CPU0:Jul 4 21:35:56 : ntpd[256]: %IP-IP_NTP-5-SYNC_LOSS : Synchronization lost : 10.192.32.33 : Peer unreachable or clock selection failed
RP/0/RP0/CPU0:Jul 4 21:35:56 : ntpd[256]: %IP-IP_NTP-5-HP_CONN_LOST : High priority NTP peer connection lost - Stratum 2->15.
RP/0/RP0/CPU0:Jul 4 21:35:56 : ntpd[256]: %IP-IP_NTP-5-ALL_CONN_LOST : All NTP peer connections failed.
RP/0/RP0/CPU0:Jul 4 21:40:11 : ntpd[256]: %IP-IP_NTP-5-HP_CONN_RECOVERED : High priority NTP peer connection recovered - Stratum 15->2.
RP/0/RP0/CPU0:Jul 4 21:50:52 : ntpd[256]: %IP-IP_NTP-5-SYNC_LOSS : Synchronization lost : 10.192.32.33 : System clock selection failed
RP/0/RP0/CPU0:Jul 4 21:50:52 : ntpd[256]: %IP-IP_NTP-5-HP_CONN_LOST : High priority NTP peer connection lost - Stratum 2->6.
RP/0/RP0/CPU0:Jul 4 21:59:26 : ntpd[256]: %IP-IP_NTP-5-HP_CONN_RECOVERED : High priority NTP peer connection recovered - Stratum 6->2.
RP/0/RP0/CPU0:Jul 4 22:25:07 : ntpd[256]: %IP-IP_NTP-5-SYNC_LOSS : Synchronization lost : 10.192.32.33 : System clock selection failed
RP/0/RP0/CPU0:Jul 4 22:25:07 : ntpd[256]: %IP-IP_NTP-5-HP_CONN_LOST : High priority NTP peer connection lost - Stratum 2->6.
RP/0/RP0/CPU0:Jul 4 22:56:16 : ntpd[256]: %IP-IP_NTP-5-SYNC_LOSS : Synchronization lost : 10.192.32.33 : Peer unreachable or clock selection failed
RP/0/RP0/CPU0:Jul 4 22:56:16 : ntpd[256]: %IP-IP_NTP-5-ALL_CONN_LOST : All NTP peer connections failed.

Hi Claudio, that ddts is pretty generic to be honest but yes it is filed to address sync issues in the XR NTP algo.
The thing is that XR ntp clock selection is a bit different then iOS and follows the specs very closely which results in this erroneous loss behavior.
For instance, you could also see this issue with a sync loss if the update time is only 500msec off what it was before and that will result in a ntp sync loss rather then adjusting to it.
Also I wanted to mention that the ntp prefer is a bit of a misnomer in XR (since it follows the specs differently then IOS) and this knob was taken over from IOS really.
You might get some joy if you set it to one server only and see if that helps?
regards
xander

This pops up when exporting in iMovie "Unable to prepare project for publishing: The project could not be prepared for publishing because an error occurred. (ParamErr: error in user parameter list)" I have turned off my Time Machine in terminal.

This pops up when exporting in iMovie "Unable to prepare project for publishing: The project could not be prepared for publishing because an error occurred. (ParamErr: error in user parameter list)" I have turned off my Time Machine in terminal yet it remains. What do I do, I need your help PLEASE.

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jonorparkerjon
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Hi ,
My Question, Is there any way that i make my Cluster time synchronization service to get time from our time servers ? In this way all my other nodes will also have same time as our time servers as they are referencing to first node, which is getting time from TIME SERVER
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Please close your thread when you get the solution to your problem. 
Mark the replies answered "helpful" answer and/or "correct" answer that will help others with same problem. 
Thanks for doing your part to make this community as valuable as possible for everyone!

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