设置CentOS6.5时钟同步
一、测试ntp服务
#rpm -q ntp
ntp-4.2.6p5-5.el6.centos.x86_64
二、/etc/ntp.conf
红色部分是修改的。
# 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 127.0.0.1
restrict -6 ::1
# Hosts on local network are less restricted.
#restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap
#允许内网其他机器同步时间
restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap
# Use public servers from the pool.ntp.org project.
# Please consider joining the pool (http://www.pool.ntp.org/join.html).
server 0.centos.pool.ntp.org iburst
server 1.centos.pool.ntp.org iburst
server 2.centos.pool.ntp.org iburst
server 3.centos.pool.ntp.org iburst
#中国这里最活跃的时间服务器: http://www.pool.ntp.org/zone/cn
server 210.72.145.44 perfer # 中国国家受时中心
#server202.112.10.36 # 1.cn.pool.ntp.org
#server59.124.169.83 # 0.asia.pool.ntp.org
#broadcast 192.168.1.255 autokey # broadcast server
#broadcastclient # broadcast client
#broadcast 224.0.1.1 autokey # multicast server
#multicastclient 224.0.1.1 # multicast client
#manycastserver 239.255.254.254 # manycast server
#manycastclient 239.255.254.254 autokey # manycast client
# Enable public key cryptography.
#crypto
includefile /etc/ntp/crypto/pw
# allow update time by the upper server
# 允许上层时间服务器主动修改本机时间
restrict 210.72.145.44 nomodify notrap noquery
restrict 202.112.10.36 nomodify notrap noquery
restrict 59.124.169.83 nomodify notrap noquery
# 外部时间服务器不可使用时,以本地时间作为时间服务。
server 192.168.0.100
fudge 192.168.0.100 stratum 10
# 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.
#trustedkey 4 8 42
# Specify the key identifier to use with the ntpdc utility.
#requestkey 8
# Specify the key identifier to use with the ntpq utility.
#controlkey 8
# Enable writing of statistics records.
"/etc/ntp.conf" 58L, 1962C written
配置文件修改完成,保存退出,启动服务。
service ntpd start
ntpstat 命令查看时间同步状态,这个一般需要5-10分钟后才能成功连接和同步。所以,服务器启动后需要稍等下。
三、配置其他节点
其他的没列举
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 |
driftfile /var/lib/ntp/drift restrict 127.0 . 0.1 restrict- 6 :: 1 # 配置时间服务器为本地的时间服务器 server 192.168 . 1.135 restrict 192.168 . 1.135 nomodify notrap noquery server 127.127 . 1.0 # local clock fudge 127.127 . 1.0 stratum 10 includefile /etc/ntp/crypto/pw keys /etc/ntp/keys |
OK,保存退出,请求服务器前,请先使用ntpdate手动同步下时间
1 2 3 |
# ntpdate -u 192.168 . 0.135
22 Dec 17 : 09 : 57 ntpdate[ 6439 ]: adjust time server 192.168 . 1.135 offset 0.004882 sec |
然后启动服务
1 |
service ntpd start |
四、配置开机启动
1 |
chkconfig --level 35 ntpd on |
转载于:https://my.oschina.net/u/3111397/blog/1796486
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