netstat -a -n | grep :123
http://www.ntp.org/
wget http://www.eecis.udel.edu/~ntp/ntp_spool/ntp4/ntp-4.2.0.tar.gz
cd ntp-4.2.0
./configure
make
make install
ntpdate -b clock.nc.fukuoka-u.ac.jp
ntpdate -d clock.nc.fukuoka-u.ac.jp
/etc/init.d/ntpd start
server ntp1.jst.mfeed.ad.jp
server ntp2.jst.mfeed.ad.jp
server ntp3.jst.mfeed.ad.jp
driftfile /var/lib/ntp/drift
logfile /var/log/ntpd.log
ntp.conf
restrict default nomodify notrap noquery
restrict 127.0.0.1
restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap
server ntp1.jst.mfeed.ad.jp
TIPS
the NTP socket is in use, exiting
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