What is the difference between
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
This site comparing chronyd vs ntpd vs openntpd suggests that chronyd has more flexibility in configuring a slewing settings.
The Red Hat documentation here has a good comparison of Chrony and NTP and says "Chrony should be preferred for all systems except for the systems that are managed or monitored by tools that do not support chrony, or the systems that have a hardware reference clock which cannot be used with chrony."