DOKK / manpages / debian 10 / ntpdate / ntpdate-debian.8.en
ntpdate-debian(8) System Manager's Manual ntpdate-debian(8)

ntpdate-debian - set the date and time via NTP

ntpdate-debian [-bBdoqsuv] [-a key] [-e authdelay] [-k keyfile] [-o version] [-p samples] [-t timeout]

ntpdate-debian is identical to ntpdate(8) except that it uses the configuration in /etc/default/ntpdate by default. ntpdate sets the local date and time by polling Network Time Protocol (NTP) servers.