RDATE(8C) — UNIX Programmer’s Manual
NAME
rdate − set system date from a remote host
SYNOPSIS
/usr/sbin/rdate hostname
DESCRIPTION
rdate sets the local date and time from the hostname given as argument. You must be super-user on the local system. Typically rdate can be inserted as part of your /etc/rc.local startup script.
FILES
/etc/rc.local
SEE ALSO
BUGS
Could be modified to accept a list of hostnames and try each until a valid date returned. Better yet would be to write a real date server that accepted broadcast requests.
7th Edition — Revision 1.1 of 29/06/90