systemd-timesyncd.service, systemd-timesyncd — Network Time Synchronization
systemd-timesyncd.service
/usr/lib/systemd/systemd-timesyncd
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.