NTP

• Differences and Use Cases for Chrony and systemd-timesyncd
• NTP und chrony: Zeitsynchronisation unter Linux sauber einrichten

chrony

Stop and disable/mask timesyncd:

sudo systemctl stop systemd-timesyncd.service
sudo systemctl mask systemd-timesyncd.service

sudo pacman -S chrony
sudo systemctl enable --now chronyd
systemctl status chronyd

Config is at /etc/chrony.conf

Show status:

chronyc tracking
chronyc sources -v
chronyc sourcestats -v

Force immediate resynchronization:

sudo chronyc makestep

Public time servers

• Network Time Foundation's NTP Support Wiki Servers Web Public stratum 1 ntp server in Germany:
• ptbtime1.ptb.de
  • ptbtime2.ptb.de
• zeit.fu-berlin.de
• time.fu-berlin.de