RDATE(8) — System Manager’s Manual — Maintenance Commands
NAME
rdate − set system date from a remote host
SYNOPSIS
/usr/etc/rdate hostname
DESCRIPTION
Rdate is a shell script to set 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.
BUGS
Prints ‘bad conversion’ if remote host unavailable. 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.
Sun System Release 1.0 — 7 April 1983