Ntp服务开启.doc

文档名称文档密级一、 服务器端1、 安装ntp包2、 配置ntp服务修改ntp.conf文件，具体见附录3、 启动服务/etc/init.d/ntpd start4、自动启动chkconfig ntpd on5、 测试命令ntptracentpq -p二、 客户端1、 安装ntp包2、 配置ntp服务修改ntp.conf文件，具体见附录3、 查询时间不用启动ntpd服务，否则会出错执行命令：ntpdate 01 即可同步4、FAQ如果执行命令出现一下错误1.提示：7 Dec 19:24:55 ntpdate2120: the NTP socket is in use, exiting这个是你linux机器上已经存在这个进程，输入：ps -ef | grep ntpdKill掉ntp的进程2.提示：No Server suitable for synchronization found这个是最容易出现的问题，比较常见的是配置好服务器并启动服务器进程后，马上启动客户进程，那么客户进程就会报错。解决方法是，在大约3-5分钟以后启动进程就行我想每10分钟就和Windows服务同步时间1.创建自己的一个crontab文件，随便建立一个文件date.cron，首先可以使用任何文本编辑器建立一个新文件，然后向其中写入需要运行的命令和要定期执行的时间。vi date.cron加入下面要运行的命令和要定期执行的时间*/10 * * * * /usr/sbin/ntpdate 2然后存盘退出2.使用crontab命令来安装这个文件，使之成为该用户的crontab文件。键入：crontab date.cron这个文件已经建立好了3.使用命令：crontab -l (查看安排的作业序列）可以看到刚才的作业如：rootNXD-TEST root# crontab -l# DO NOT EDIT THIS FILE - edit the master and reinstall.# (date.cron installed on Tue Dec 7 18:22:42 2004)# (Cron version - $Id: crontab.c,v 2.13 1994/01/17 03:20:37 vixie Exp $)*/10 * * * * /usr/sbin/ntpdate 2现在就OK了，每10分钟Linux就和服务端同步一次。附录：服务器端ntp.conf# Permit time synchronization with our time source, but do not# permit the source to query or modify the service on this system.#restrict default nomodify notrap noquery# Permit all access over the loopback interface. This could# be tightened as well, but to do so would effect some of# the administrative functions.restrict # - CLIENT NETWORK -# Permit systems on this network to synchronize with this# time service. Do not permit those systems to modify the# configuration of this service. Also, do not use those# systems as peers for synchronization.restrict mask nomodify #112网段的客户端都可以访问# - OUR TIMESERVERS - #server 0. 不配置Internet网络时间服务器#server 1.#server 2.# - NTP MULTICASTCLIENT -#multicastclient# listen on default # restrict mask 55 nomodify notrap# restrict mask nomodify notrap# - GENERAL CONFIGURATION -# Undisciplined Local Clock. This is a fake driver intended for backup# and when no outside source of synchronized time is available. The# default stratum is usually 3, but in this case we elect to use stratum# 0. Since the server line does not have the prefer keyword, this driver# is never used for synchronization, unless no other other# synchronization source is available. In case the local host is# controlled by some external source, such as an external oscillator or# another protocol, the prefer keyword would cause the local host to# disregard all other synchronization sources, unless the kernel# modifications are in use and declare an unsynchronized condition.#server# local clockfudge stratum 10# Drift file. Put this in a directory which the daemon can write to.# No symbolic links allowed, either, since the daemon updates the file# by creating a temporary in the same directory and then rename()ing# it to the file.#driftfile /var/lib/ntp/driftbroadcastdelay0.008# Keys file. If you want to diddle your server at run time, make a# keys file (mode 600 for sure) and define the key number to be# used for making requests.# PLEASE DO NOT USE THE DEFAULT VALUES HERE. Pick your own, or remote# systems might be able to reset your clock at will. Note also that# ntpd is started with a -A flag, disabling authentication, that# will have to be removed as well.#keys/etc/ntp/keys客户端ntp.conf# Permit time synchronization with our time source, but do not# permit the source to query or modify the service on this system.#restrict default nomodify notrap noquery# Permit all access over the loopback interface. This could# be tightened as well, but to do so would effect some of# the administrative functions.restrict # - CLIENT NETWORK -# Permit systems on this network to synchronize with this# time service. Do not permit those systems to modify the# configuration of this service. Also, do not use those# systems as peers for synchronization.# restrict mask nomodify notrap# - OUR TIMESERVERS - server 01 设置局域网时间服务器地址#server 0.#server 1.#server 2.# - NTP MULTICASTCLIENT -#multicastclient# listen on default # restrict mask 55 nomodify notrap# restrict mask nomodify notraprestrict 01 mask nomodifY# - GENERAL CONFIGURATION -# Undisciplined Local Clock. This is a fake driver intended for backup# and when no outside source of synchronized time is available. The# default stratum is usually 3, but in this case we elect to use stratum# 0. Since the server line does not have the prefer keyword, this driver# is never used for synchronization, unless no other other# synchronization source is available. In case the local host is# controlled by some external source, such as an external oscillator or# another protocol, the prefer keyword would cause the local host to# disregard all other synchronization sources, unless the kernel# modifications are in use and declare an unsynchronized condition.#server# local clockfudge stratum 10# Drift file. Put this in a directory which the daemon can write to.# No symbolic links allowed, either, since the daemon updates the file# by creating a temporary in the same directory and then rename()ing# it to the file.#driftfile /var/lib/ntp/driftbroadcastdelay0.008# Keys file. If you want to diddle your server at run time, make a# keys file (mode 600 for sure) and define the key number to be# used for making