kazulog@sv1:~$ cat /etc/os-release | head -2
PRETTY_NAME="Ubuntu 26.04 LTS"
NAME="Ubuntu"
kazulog@sv1:~$ ls /etc/chrony/conf.d/ /etc/chrony/sources.d/
/etc/chrony/conf.d/:
README  ubuntu-nts.conf

/etc/chrony/sources.d/:
README  ubuntu-ntp-pools.sources
kazulog@sv1:~$ chronyc sources -v | tail -7
MS Name/IP address         Stratum Poll Reach LastRx Last sample
===============================================================================
^+ ntp-nts-2.ps5.canonical.>     2   6    17    36    +13ms[  +28ms] +/-  119ms
^+ ntp-nts-3.ps5.canonical.>     2   6    17    36    +13ms[  +28ms] +/-  120ms
^- ntp-nts-2.ps6.canonical.>     2   6    17    35    -42ms[  -42ms] +/-  173ms
^* ntp-nts-3.ps6.canonical.>     2   6    17    35    -26ms[  -11ms] +/-  154ms
^- ntp-nts-1.ps5.canonical.>     2   6    17    35    +11ms[  +11ms] +/-  116ms
kazulog@sv1:~$ chronyc tracking | head -3
Reference ID    : 5BBD5B71 (ntp-nts-3.ps6.canonical.com)
Stratum         : 3
Ref time (UTC)  : Fri Sep 11 07:38:00 2026
kazulog@sv1:~$ timedatectl | head -6
               Local time: Fri 2026-09-11 16:38:37 JST
           Universal time: Fri 2026-09-11 07:38:37 UTC
                 RTC time: Fri 2026-09-11 07:38:37
                Time zone: Asia/Tokyo (JST, +0900)
System clock synchronized: yes
              NTP service: active