kazulog@sv1:~$ cat /etc/os-release | head -2
PRETTY_NAME="Ubuntu 26.04 LTS"
NAME="Ubuntu"
kazulog@sv1:~$ date
Fri Sep 11 16:29:38 JST 2026
kazulog@sv1:~$ sudo date -s '+5 minutes'
kazulog@sv1:~$ chronyc tracking
Reference ID    : 00000000 ()
Stratum         : 0
Ref time (UTC)  : Thu Jan 01 00:00:00 1970
System time     : 0.000000000 seconds fast of NTP time
Last offset     : -0.000318293 seconds
RMS offset      : 0.000318293 seconds
Frequency       : 5.095 ppm fast
Residual freq   : +0.000 ppm
Skew            : 0.000 ppm
Root delay      : 1.000000000 seconds
Root dispersion : 1.000000000 seconds
Update interval : 65.2 seconds
Leap status     : Not synchronised
kazulog@sv1:~$ chronyc sources
MS Name/IP address         Stratum Poll Reach LastRx Last sample
===============================================================================
^? 192.168.100.1                 3   6    77    14  +300.0s[+300.0s] +/- 6109us
kazulog@sv1:~$ sudo chronyc makestep
200 OK
kazulog@sv1:~$ date
Fri Sep 11 16:35:29 JST 2026
kazulog@sv1:~$ chronyc tracking
Reference ID    : 00000000 ()
Stratum         : 0
Ref time (UTC)  : Thu Jan 01 00:00:00 1970
System time     : 0.000000000 seconds fast of NTP time
Last offset     : -0.000318293 seconds
RMS offset      : 0.000318293 seconds
Frequency       : 5.095 ppm fast
Residual freq   : +0.000 ppm
Skew            : 0.000 ppm
Root delay      : 1.000000000 seconds
Root dispersion : 1.000000000 seconds
Update interval : 65.2 seconds
Leap status     : Not synchronised
kazulog@sv1:~$ timedatectl | head -6
               Local time: Fri 2026-09-11 16:35:29 JST
           Universal time: Fri 2026-09-11 07:35:29 UTC
                 RTC time: Fri 2026-09-11 07:30:29
                Time zone: Asia/Tokyo (JST, +0900)
System clock synchronized: no
              NTP service: active