??????×??±???????????????ú???±???á???ò?????????????±?????é ?¨NTP?? ???????·±??ú???±??±???×??·??·?·¨????°???????????°?×°??NTP·???

?????????????ü???é??

[root@wap etc]# rpm -qa |grep ntp

ntp-4.2.0.a.20040617-4.EL4.1

NTP·??????÷??°ü?¨????????

/etc/ntp.conf ?? NTP·??????÷??????????

/usr/share/zoneinfo ?????¨???÷?÷???±?????±???è?¨????????????/usr/share/zoneinfo/Asia/Shanghai

/etc/sysconfig/clock ?? Linux???÷???±???è?¨???????????????óLinux??×÷?????????????????????è?¨?????¤?è???????±?????????°Zone=Asia/Shanghai

/etc/localtim ??±??????????±???è?¨??????

/bin/date Linux?????????????????±???????°?????ü??

/sbin/hwclock ?÷?ú??BIOS?±????Linux?????±??·???date ?????????÷???ó???????°?ì?????±?????????ü??BIOS?±?????è????hwlock?ü??

/usr/sbin/ntpd ?? NTP·????????¤????

/usr/sbin/ntpdata ??NTP???§??????????NTP·????÷?ü??????

/usr/sbin/ntpq ±ê×????????±???é?¨NTP???é?????ò

????

[root@wap etc]# vi /etc/ntp.conf

restrict default ignore

//?????ù??ntp???ó·?°ü

restrict 127.0.0.1

restrict 218.0.0.0 mask 255.255.255.248 nomodify

restrict 202. 0.0.0 mask 255.255.255.0 nomodify

restrict 61. 0.0.0 mask 255.255.255.0 nomodify

//restrict????????×?????ip????????????nomodify????±í?????§???????¨??·????÷???§?é?????????ü??·????÷??????

server 0.pool.ntp.org

server 1.pool.ntp.org

server 2.pool.ntp.org

//×???server???????¨????????????·????÷????????·????÷?????????????????????¨·????÷?????¨?? prefer ?¨?????? ????

restrict 0.pool.ntp.org

restrict 1.pool.ntp.org

restrict 2.pool.ntp.org

//????restric ?ó????????????±í?????????í?????¨??

server 127.127.1.0 # local clock

fudge 127.127.1.0 stratum 10

driftfile /var/lib/ntp/drift

//driftfile ???????ò???¨??????±????????±?????????????????? ntpd???ò?????ü??×??????????±????×????????? ???????±???????????????????±?????é??????????±????à?±??×??·??

broadcastdelay 0.008

logfile /var/log/ntp.log

keys /etc/ntp/keys

???§???è????

?¨??crontab???±?÷?????è??????5·???????????

*/5 * * * * /usr/local/wapsh/ntprsync.sh

[root@AppServer wapsh]# cat ntprsync.sh

#??/bin/sh

/usr/sbin/ntpdate 218.0.0.1

/sbin/hwclock ¨Cw

????218.0.0.1??·????÷??ip?????ù???§??????5·???????·????÷?????±????????