ntpdate

Synchronize and set the date and time via NTP. More information: https://manned.org/ntpdate.

• Synchronize and set date and time:

sudo ntpdate host

• Query the host without setting the time:

ntpdate -q host

• Use an unprivileged port in case a firewall is blocking privileged ports:

sudo ntpdate -u host

• Force time to be stepped using settimeofday instead of slewed:

sudo ntpdate -b host