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HowtoNTP.md
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HowtoNTP.md
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@ -121,6 +121,43 @@ On conseille de l'activer au démarrage :
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# rcctl set ntpd flags "-s"
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~~~
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## Outils
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### ntpdate
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L'outil _ntpdate_ (package à installer) permet de lancer une synchronisation en ligne de commande. C'est notamment utile en mode debug :
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~~~
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# ntpdate ntp.evolix.net
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31 May 12:24:07 ntpdate[29352]: adjust time server 31.170.8.123 offset 0.000484 sec
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# ntpdate -d ntp.evolix.net
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31 May 12:37:40 ntpdate[29382]: ntpdate 4.2.8p10@1.3728-o Sun May 7 22:26:53 UTC 2017 (1)
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transmit(31.170.8.123)
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receive(31.170.8.123)
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transmit(31.170.8.123)
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receive(31.170.8.123)
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transmit(31.170.8.123)
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receive(31.170.8.123)
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transmit(31.170.8.123)
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receive(31.170.8.123)
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server 31.170.8.123, port 123
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stratum 2, precision -22, leap 00, trust 000
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refid [31.170.8.123], delay 0.02649, dispersion 0.00002
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transmitted 4, in filter 4
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reference time: dcd9190c.fda602f8 Wed, May 31 2017 12:27:24.990
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originate timestamp: dcd91b7a.34519aeb Wed, May 31 2017 12:37:46.204
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transmit timestamp: dcd91b7a.342bf15c Wed, May 31 2017 12:37:46.203
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filter delay: 0.02669 0.02670 0.02649 0.02676
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0.00000 0.00000 0.00000 0.00000
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filter offset: 0.000082 0.000017 0.000060 -0.00002
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0.000000 0.000000 0.000000 0.000000
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delay 0.02649, dispersion 0.00002
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offset 0.000060
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31 May 12:37:46 ntpdate[29382]: adjust time server 31.170.8.123 offset 0.000060 sec
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~~~
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## Munin
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Pour les serveurs utilisant un serveur NTP uniquement pour leurs besoins, Munin
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@ -129,3 +166,15 @@ temps. Il ne reste qu'à les activer.
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Pour les serveurs NTP, des plugins non officiels existent : _ntp_queries_ etc.
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## FAQ
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### ntpdate: the NTP socket is in use, exiting
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Si vous avez une erreur du type :
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~~~
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# ntpdate ntp.evolix.net
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31 May 12:19:23 ntpdate[29290]: the NTP socket is in use, exiting
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~~~
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C'est que votre socket réseau udp/123 est occupée par un autre programme, probablement un démon NTP !
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