rdate(8c)rdate(8c)Namerdate - network date client
Syntax
/etc/rdate [ -s ] [ -v ] [ network ]
Description
The command is invoked at boot time to reset the system date and time
to the current network date and time. The program sends a broadcast
datagram packet on the specified network or on the system default net‐
work if no network is specified. The program will then wait two sec‐
onds for responses. After that time, the arithmetic median of the
responses is taken.
Options-s The system date and time will be set to the median value.
-v The time values returned by all responding hosts will be reported.
Restrictions
In order for to determine a network time, at least one of the running
hosts on the network must be running the internet time service.
Machines with their own battery-backed-up time-of-day clock may not
desire to set time in this manner.
See Alsodate(1)rdate(8c)