Is there any issue with running systemd-timesyncd and ntp on the same machine?
I'm asking this because I have started using NTP on all servers but the systemd-timesyncd is running there as well. Should I disable it? Any issues with both running?
It shouldn't be necessary to disable systemd-timesyncd if you install ntp, because the ntp service configuration includes the following:
# grep -i conflict /lib/systemd/system/ntp.service
Conflicts=systemd-timesyncd.service
The same applies for the chrony service on newer Ubuntu versions.
There have been startup bugs in the past which meant systemd-timesyncd tried to adjust the clock while another NTP server is running, producing harmless-but-annoying errors in the system logs. So there should be no harm in disabling systemd-timesyncd if that's what you prefer.
