Sincronizar fecha y hora

RDATE(1)                           Red Hat                           RDATE(1)

NAME
rdate - get the time via the network

SYNOPSIS
rdate [-p] [-s] [-u] [-l] [-t sec] [host...]

DESCRIPTION
rdate connects to an RFC 868 time server over a TCP/IP network, print-
ing the returned time and/or setting the system clock.

OPTIONS
-p     Print the time returned by the remote machine.

-s     Set the system time to the returned time.

-u     Use UDP instead of TCP as the transport.

-l     Use  syslog  to  output  errors   (cron.warning)   and   output
(cron.info).

-t     Set timeout in seconds for every attempt to retreive date.