????ntpdate 0.centos.pool.ntp.org
??????linux?￡????????????????NTP(Network Time Protocol)Э????????????????????????????
?????????????????????б?????????????????
????http://ntp.isc.org/bin/view/Servers/NTPPoolServers
????NTP???????????????????????????????????Э?顣?????????????????????н?????????????????????????????????????????????????????????????????????????
????????????????179???????????????????????????179?????179???????????????????
???????????179????????
????1????????NTP????汾
????rpm -qa | grep ntp
????ntp-4.1.2-4.EL3.1
?????????п????linux????????????????ntp??
????2???????????
????vi /etc/ntp.conf
????????????????
????server pool.ntp.org
????restrict default nomodify notrap noquery
????restrict 192.168.0.0 mask 255.255.255.0 notrust nomodify notrap #??192.168.0.1-192.168.0.254?????????????????????NTP??????????????
???????????????
????#restrict default ignore
????3?????NTP??????
????#chkconfig ntpd on
????#/etc/init.d/ntpd start
????#/etc/init.d/ntpd stop
????#/etc/init.d/ntpd restart
???????????￡??????????NTP???????????????????????????????????/etc/ntp/step-tickers??????????????????????????????/etc/init.d/ntpd ??????????????????????????
???????????????????
????ntpq -p
????ntptrace 192.168.0.179
??????????????????????????????????????????????????????????