ntpdate-debian - set the date and time via NTP

ntpdate-debian  is  identical to ntpdate(8) except that it uses the configuration in /etc/default/ntpsec-ntpdate by default.  ntpdate sets the local date and time by polling  the  Network  Time  Protocol  (NTP)
       server(s) given as the server argument(s) to determine the correct time.

                                                                                               ntpdate-debian(8)

       ntpdate-debian - set the date and time via NTP

ntpdate-debian [-46bBdqsuv] [-akey] [-kkeyfile] [-oversion] [-ttimeout] server [...]