A Script to Update/Synchronize Your System Time

#!/bin/bash
#
# @(#)ntp.sh 1.0 07/06/04
#
# Copyright (c) 2004
#      Ali Onur Cinar &060;cinar(a)zdo.com&062;
#
# License:
#
#   Permission  to use, copy, modify, and distribute this software and its
#   documentation  without  fee is hereby granted, provided that the above
#   copyright  notice  appear  in  all  copies and that both the copyright
#   notice  and  this  permission notice and warranty disclaimer appear in
#   supporting  documentation,  and that the name of Ali Onur Cinar not be
#   used  in  advertising  or  publicity pertaining to distribution of the
#   software without specific, written prior permission.
# 

ntpHost=time.nist.gov
ntpPort=13
ntpTemp=/tmp/ntp.$$

telnet ${ntpHost} ${ntpPort} 2> /dev/null \
 | tail -1 \
 | sed -e 's/-/ /g ; s/:/ /g' \
 > ${ntpTemp}

while read -a n
do
 date --utc ${n[2]}${n[3]}${n[4]}${n[5]}${n[1]}.${n[6]}
done < ${ntpTemp}

rm -f ${ntpTemp}