$ sudo timedatectl
Local time: Sun 2022-07-10 18:27:46 CEST
Universal time: Sun 2022-07-10 16:27:46 UTC
RTC time: Sun 2022-07-10 16:27:46
Time zone: Europe/Stockholm (CEST, +0200)
System clock synchronized: yes
NTP service: active
RTC in local TZ: no
$ sudo timedatectl -h
timedatectl [OPTIONS...] COMMAND ...
Query or change system time and date settings.
Commands:
status Show current time settings
show Show properties of systemd-timedated
set-time TIME Set system time
set-timezone ZONE Set system time zone
list-timezones Show known time zones
set-local-rtc BOOL Control whether RTC is in local time
set-ntp BOOL Enable or disable network time synchronization
systemd-timesyncd Commands:
timesync-status Show status of systemd-timesyncd
show-timesync Show properties of systemd-timesyncd
Options:
-h --help Show this help message
--version Show package version
--no-pager Do not pipe output into a pager
--no-ask-password Do not prompt for password
-H --host=[USER@]HOST Operate on remote host
-M --machine=CONTAINER Operate on local container
--adjust-system-clock Adjust system clock when changing local RTC mode
--monitor Monitor status of systemd-timesyncd
-p --property=NAME Show only properties by this name
-a --all Show all properties, including empty ones
--value When showing properties, only print the value
See the timedatectl(1) man page for details.
$ sudo timedatectl list-timezones
$ sudo timedatectl set-ntp true
$ sudo chronyc sources -v
.-- Source mode '^' = server, '=' = peer, '#' = local clock.
/ .- Source state '*' = current best, '+' = combined, '-' = not combined,
| / 'x' = may be in error, '~' = too variable, '?' = unusable.
|| .- xxxx [ yyyy ] +/- zzzz
|| Reachability register (octal) -. | xxxx = adjusted offset,
|| Log2(Polling interval) --. | | yyyy = measured offset,
|| \ | | zzzz = estimated error.
|| | | \
MS Name/IP address Stratum Poll Reach LastRx Last sample
===============================================================================
^- ntp1.vmar.se 2 7 377 114 +527us[ +527us] +/- 28ms
^- ec2-16-16-55-166.eu-nort> 2 7 377 116 -1587us[-1283us] +/- 43ms
^* time.cloudflare.com 3 7 377 115 +519us[ +823us] +/- 2212us
^- lul1.ntp.netnod.se 1 7 377 115 -3057us[-2753us] +/- 14ms
$ sudo cat /etc/chrony.conf
$ sudo man 5 chrony.conf
$ sudo systemctl status chronyd.service
● chronyd.service - NTP client/server
Loaded: loaded (/usr/lib/systemd/system/chronyd.service; enabled; vendor preset: enabled)
...
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