Linux的NTP配置总结.docxVIP

Linux的NTP配置总结 2015-08-20 12:29 by 潇湘隐者,?4678?阅读,?2?评论,? 收藏,? 编辑 在Linux系统中，为了避免主机时间因为在长时间运行下所导致的时间偏差，进行时间同步(synchronize)的工作是非常必要的。Linux系统下，一般使用ntp服务来同步不同机器的时间。NTP 是网络时间协议（Network Time Protocol）的简称，干嘛用的呢？就是通过网络协议使计算机之间的时间同步化。 ? 安装NTP包 检查是否安装了ntp相关包。如果没有安装ntp相关包，使用rpm或yum安装，安装也非常简单方便。 [root@localhost ~]#? rpm -qa | grep ntp ntpdate-4.2.6p5-1.el6.x86_64 fontpackages-filesystem-1.41-1.1.el6.noarch ntp-4.2.6p5-1.el6.x86_64 ? NTP的配置 ? A： 配置/etc/ntp.conf NTP Server的主要配置文件为/etc/ntp.conf ,没有修改过的ntp.conf文件内容如下所示，配置选项都有相关注释信息（Linux 版本为Red Hat Enterprise Linux Server release 6.6 ） [root@localhost ~]# more /etc/ntp.conf # For more information about this file, see the man pages # ntp.conf(5), ntp_acc(5), ntp_auth(5), ntp_clock(5), ntp_misc(5), ntp_mon(5). ? driftfile /var/lib/ntp/drift ? # Permit time synchronization with our time source, but do not # permit the source to query or modify the service on this system. restrict default kod nomodify notrap nopeer noquery restrict -6 default kod nomodify notrap nopeer 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 restrict -6 ::1 ? # Hosts on local network are less restricted. #restrict mask nomodify notrap ? # Use public servers from the project. # Please consider joining the pool (/join.html). server 0. iburst server 1. iburst server 2. iburst server 3. iburst ? ? #broadcast 55 autokey??????? # broadcast server #broadcastclient??????????????????????? # broadcast client #broadcast autokey??????????? # multicast server #multicastclient ????????????? # multicast client #manycastserver 54???????? # manycast server #manycastclient 54 autokey # manycast client ? # Enable public key cryptography. #crypto ? includefile /etc/ntp/crypto/pw ? # Key file containing the keys and key identifiers used when operating # with symmetric key cryptography. keys /etc/ntp/keys ? # Specify the key identifiers which are trusted