Questions tagged [chrony]
The chrony tag has no summary.
60 questions
4
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1
answer
105
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RTC drift compensation during sleep
I have a Linux computer with real time clock (PCF85063) drift of three seconds per day, which causes problems after longer sleep.
I tried to setup chrony, which is able to track the drift of the RTC (...
- 41
0
votes
1
answer
200
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Chrony NTP: synchronization with an external NTP server in my Docker container works for a few seconds, but after that, synchronization stops working
Time synchronization with an external NTP server in my Docker container works for a few seconds, but after that, synchronization stops working :
logs :
2024-09-08T20:54:15Z chronyd version 4.0 ...
- 151
1
vote
1
answer
6k
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diagnosing chronyc sources unusable - time won't sync
Trying to get chrony working on a LAN, in RHEL-8.10. The service on either my chrony server or a client appears to be functional as reported by a service chronyd status -l. However I cannot get time ...
- 9,112
1
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0
answers
490
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chrony immediate time sync
Running RHEL-8.9 I have a handful+ servers in a computer lab, which do not have an internet connection and [currently] have no means of fetching any kind of stratum-0 type time. We therefore manually ...
- 9,112
1
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0
answers
182
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chrony takes many minutes to read refclocks after boot
I'm looking to provide precise time to a Raspberry Pi 4 without internet via a UBLOX GNSS module that sends NMEA sentences to /dev/serial0 and a pulse-per-second (PPS) signal to /dev/pps0.
All this ...
- 126
0
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0
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1k
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chrony port 323 automatically open with firewalld?
Documentation states chrony uses port 323udp by default, versus port 123udp that old NTP used. But where is port 323 defined, because I do not see it in the default /etc/chrony.conf as it comes in a ...
- 9,112
0
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1
answer
1k
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Chrony is not sync with date command
I paused the virtual machine on the VM and disconnected its internet connection without rebooting the system. When I started the system from sleep mode without rebooting, the system clock continued ...
1
vote
1
answer
357
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Tracking Fields in Chrony
When I study with chronyc tracking command I got some fields and I need more description about it.
chronyc tracking
----------------
Reference ID : B9E84541 (nobody.yourvserver.net)
Stratum ...
0
votes
0
answers
269
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ntpd requires stripping out the HEX: prefix from SHA1 and SHA256 hex keys to interwork with chrond server
I am new to this business, and could not find the answers to the following:
In order for ntpd client to sync up with chronyd server using a hex key value, I found that I need to strip out the HEX: ...
- 1
5
votes
1
answer
2k
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In Debian bullseye, does systemd-timesyncd check for other ntp daemons?
I've used systemd-timesyncd as my system timekeeper for several years now. I run a Debian derivative called raspbian for my Raspberry Pis. I'm mostly very pleased with the SNTP client that is systemd-...
- 3,833
0
votes
2
answers
3k
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Chronyd clients query
it's possibile see log of sync query from client?
There are tracking.log statistics.log measurements.log but in this log there are not clients query
I try from my client to query with command
ntpdate ...
- 109
0
votes
1
answer
346
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Force NTP step whenever the Internet comes up
Assume there is a PC with dead CMOS battery and unreliable Internet connection.
As far as I understand, both chrony and ntpd try to correct huge time differences (years) once – upon startup, – but ...
- 153
1
vote
1
answer
245
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How can I determine the current reliability [correctness] of the system time?
I'm working on a project which will acquire a lot of timestamped data at fairly high resolution (50 samples per second) over a very long period of time (years).
The solution includes various failover ...
- 21k
1
vote
1
answer
3k
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Chrony - Synchronize the date and time of all host computers in a network without internet connection
I have two machines,
host A with IP 192.168.0.1
host B with IP 192.168.0.2
They connected to the same network and I would like to set the date and time of machine B to match those of machine A. ...
- 2,554
0
votes
1
answer
973
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Using RTC PPS for syncing computer by NTP
I've seen a decent amount of documentation for how one would use a GPS and its PPS signal along with an NTP package (like ntpd or chrony) to synchronize the computer's clock.
I have a need similar to ...
- 130