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This is an old revision of the document!

I remember looking at this circa 2016 - 2021 and letting go at that time, crony had just been released and systemd was still relatively new at that time.

systemd commands

sudo systemctl status systemd-timesyncd
- The default configuration is shown in /etc/systemd/timesyncd.conf (All the defaults are shown commented out)
- Copy the default configuration in /etc/systemd/timesyncd.conf to /etc/systemd/timesyncd.conf.d/timesyncd.conf and modify options in /etc/systemd/timesyncd.conf.d/timesyncd.conf
timedatectl timesync-status

ntp servers

ntp servers can be checked using the ntpdate command, which can be loaded in Debian with sudo apt install ntpsec-ntpdate

Ranked by testing with sudo ntpdate -q {ntp servername/ip}

sync	accuracy	server	ip address	stratum	leap status
+0.018040	+/- 0.026068	nets.org.sg	129.126.239.115	s1	no-leap
+0.020117	+/- 0.027653	server 3.au.pool.ntp.org	103.126.53.123	s2	no-leap
+0.020819	+/- 0.027315	0.au.pool.ntp.org	139.99.135.247	s2	no-leap
+0.050351	+/- 0.064718	1.au.pool.ntp.org	180.150.8.191	s1	no-leap
+2.023585	+/- 2.027176	2.au.pool.ntp.org	110.232.114.22	s2	no-leap

Taken 2025-11-09 09:40

sync	accuracy	server	ip address	stratum	leap status
+0.002717	+/- 0.027207	3.debian.pool.ntp.org	139.99.135.247	s2	no-leap
+0.003344	+/- 0.030205	0.debian.pool.ntp.org	150.107.75.115	s2	no-leap
+0.187739	+/- 0.208642	1.debian.pool.ntp.org	203.132.94.154	s1	no-leap
+2.001419	+/- 2.038669	2.debian.pool.ntp.org	159.196.3.239	s2	no-leap
+0.000044	+/- 0.024017	pool.ntp.org	129.250.35.250	s2	no-leap
+0.000092	+/- 0.024373	au.pool.ntp.org	112.213.32.219	s2	no-leap
+0.023537	+/- 0.064874	0.au.pool.ntp.org	159.196.3.239	s2	no-leap
+0.000697	+/- 0.021170	1.au.pool.ntp.org	67.219.100.202	s2	no-leap
+2.002964	+/- 2.027214	2.au.pool.ntp.org	112.213.32.219	s2	no-leap
+0.154351	+/- 0.184338	3.au.pool.ntp.org	159.196.40.161	s1	no-leap

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