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Full Discussion: NTPD service restart and time synch
Operating Systems Linux Red Hat NTPD service restart and time synch Post 302992756 by MadeInGermany on Wednesday 1st of March 2017 10:54:36 AM
Old 03-01-2017
That's what it does with the servers in /etc/ntp/step-tickers
You do not need a driftfile.
If your driftfile makes problems, check if it has got the right permissions ntp:ntp
For example the pathname is /var/lib/ntp/ntp.drift
Code:
ls -ld /var/lib/ntp/ntp.drift /var/lib/ntp
drwxr-xr-x 2 ntp ntp  date  /var/lib/ntp
-rw-r--r-- 1 ntp ntp  date  /var/lib/ntp/ntp.drift

And initially this file should be empty, so the then started ntpd will write it after some hours according to its measurement.
A good debug command for the ntpd is
Code:
ntpq -p

or
Code:
ntpq -np

This User Gave Thanks to MadeInGermany For This Post:
rbatte1
 

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LEARN ABOUT POSIX

systemd-timesyncd.service

SYSTEMD-TIMESYNCD.SERVICE(8)				     systemd-timesyncd.service				      SYSTEMD-TIMESYNCD.SERVICE(8)

NAME

       systemd-timesyncd.service, systemd-timesyncd - Network Time Synchronization

SYNOPSIS

       systemd-timesyncd.service

       /lib/systemd/systemd-timesyncd

DESCRIPTION

       systemd-timesyncd is a system service that may be used to synchronize the local system clock with a remote Network Time Protocol server. It
       also saves the local time to disk every time the clock has been synchronized and uses this to possibly advance the system realtime clock on
       subsequent reboots to ensure it monotonically advances even if the system lacks a battery-buffered RTC chip.

       The systemd-timesyncd service specifically implements only SNTP. This minimalistic service will set the system clock for large offsets or
       slowly adjust it for smaller deltas. More complex use cases are not covered by systemd-timesyncd.

       The NTP servers contacted are determined from the global settings in timesyncd.conf(5), the per-link static settings in .network files, and
       the per-link dynamic settings received over DHCP. See systemd.network(5) for more details.

       timedatectl(1)'s set-ntp command may be used to enable and start, or disable and stop this service.

FILES

       /var/lib/systemd/timesync/clock
	   This file contains the timestamp of the last successful synchronization.

SEE ALSO

       systemd(1), timesyncd.conf(5), systemd.network(5), systemd-networkd.service(8), timedatectl(1), localtime(5), hwclock(8)

systemd 237													      SYSTEMD-TIMESYNCD.SERVICE(8)
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