rdate - get the time via the network

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, printing 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. HISTORY        2004-03-16 Johan Nilsson <joh-nils@dsv.su.se>               Timeout support added.        2002-11-06 Elliot Lee <sopwith@redhat.com>               Patch from Tomek Orzechowski <orzech@pld.org.pl> - alarm(10) to not wait forever for connections.        2001-05-23 Phil Knirsch <pknirsch@redhat.com>               Added UDP protocol support.  Close the connection after message handling in conformance to RFC 868.        2002-03-07 Elliot Lee <sopwith@redhat.com>               Add syslog functionality.        2000-02-04 Elliot Lee <sopwith@redhat.com>               Wrote it (previous incarnation had license problems, all 200 lines of it). Utilities                          May 2001                           RDATE(1)

rdate는 NTP(Network Time Protocol)을 이용하여 시간을 동기화 시켜 주는 유틸리티 이다.
윈도우에서 사용하는 기본 타임 서버는

time.windows.com
time.nist.gov

이며, 국내에서 사용하는 타임서버로는
time.kriss.re.kr
time.bora.net
등이 있다.

Fedora 에서는

0.fedora.pool.ntp.org
1.fedora.pool.ntp.org
2.fedora.pool.ntp.org
을 사용한다.

2010.02.25 추가
# rdate -s time.bora.net
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