ntpdate(8) on Linux
The text d598a0ab433c, as Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze) shipped it.
set the date and time via NTP
Flags it lists
-
-B -
-b -
-d -
-q -
-s -
-u -
-v