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Questions tagged [chrony]

50 questions
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chrony vs. systemd-timesyncd – What are the differences and use cases as NTP clients?

Somehow but not quite building upon the older question "ntpd vs. systemd-timesyncd - How to achieve reliable NTP syncing?", I'd like to ask about the differences between chrony and systemd-timesyncd in terms of an NTP client. I know that…
wedi
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Difference between chronyd and ntpd

What is the difference between chronyd and ntpd? I know that ntpd can gradually adjust the time so that it can converge gradually to the the reference clock. Can this be done with chrony?
ComBin
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Chrony 3.1 refuses to sync with ntp server

I have 70 machine with CentOS 7.2 and chrony version 2.1.1 syncing perfect with my NTP server protocol v3. Recently I added 30 machines with CentOS 7.4 and chrony version 3.1, but these 30 machines refuse to sync, I followed all the troubleshooting…
Jawad Al Shaikh
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Set clock to 24 hour format for all users

On Fedora 30, I'm currently displaying the date in 24 hour format in the desktop environment. I'm syncing time via chronyd. But on the CLI, the time is displaying as Fri 22 Nov 2019 02:47:51 PM EST for all users. I want to set the time format to use…
Kahn
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4
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Chrony 506 Cannot talk to daemon

I'm having trouble configuring chrony to sync the time between my raspberry pi and a desktop computer in an isolated network. My raspberry pi's chrony.config file looks like this: server master driftfile /var/lib/chrony/chrony.drift logdir…
Andrew Capodieci
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Creating an isolated NTP server with only 1PPS and no external "time" input (No GPS)

Am looking to have a small NTP server (Chrony) provide time to different computers located on the same student under water vehicle connected via ethernet cables. We are primarily concerned with having different parts of the vehicle synchronized to…
Alexis
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Chrony client do not change system and hardware date

Context Centos 7 chronyd (chrony) version 3.1 Issue I am encountering an issue with chonyd and server date. First, change current date to old date I changed the hardware clock date from the current real date mar. nov. 27 15:57:12 CET 2018 to mer.…
Alrick
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Automatic time synchronization: `ntpdate` works but `chrony` does not

I have a problem with time synchronization of my Linux server. Both this machine and the NTP server are located in a (smaller) university data center hence the local address. What is strange is that the ntpdate command works: ntpdate -u…
ksonofre
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Does having hyperv-daemons enabled show that the system clock is synchronised by timedatectl?

We are opting to disable chronyd in favour of using hyperv-daemons to keep our server clocks in sync so that the guest OS time is managed by the machine that the VM is running on. After disabling chronyd and enabling hyperv-daemons, the server clock…
Alex Ritchie
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Why is the computer clock off by few seconds after reboot?

My computer runs 24/7 and does an automatic reboot at night after each kernel/systemd/glibc upgrade. On Fedora this happens every few days. The system clock is synchronized with NTP protocol using the chrony. The HW clock is synchronized: # Enable…
VPfB
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Chrony sources are with unknown address

I'm trying to setup chrony but it's not working. I start the service using one of the following command: sudo systemctl stop chronyd; sudo systemctl start chronyd sudo systemctl restart chronyd timedatectl says I'm not synched timedatectl Local…
Leo
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time on machines change after some time in spite chrony service configured

we have machines in cluster before one week we restart the chrony service , and we check the time on all machines after chrony restart time was ok on all machines after 2 days we noticed that on some machine we have time diff for more then 1 hour…
yael
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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 mechanisms. During the lifespan of this project…
Philip Couling
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Why still chrony is not taking time from PPS after 197 hours?

I'm using chrony where GPSD and the PPS will be used for accurate timings. my chrony.conf file as follows, refclock SHM 0 delay 0.8 refid NMEA trust prefer …
Omkar Dixit
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Issues Using GPSD as Source for Chronyd

I am attempting to use a USB GPS without PPS dongle as the sole time source on Ubuntu 18.04. GPSD appears to be working correctly since cgps reports a 3D fix. However, I can't get chrony to see the GPS information. # gpsd -ND 8…
glasstea
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