1、安裝前的準備

檢視系統上面設定的時區

[root@linux-node1 ~]# cat /etc/sysconfig/clock 
ZONE="Asia/Shanghai"
思想：怎麼修改linux主機上面的解決辦法：
修改時區
vim /etc/sysconfig/clock
ZONE="Asia/Shanghai"
UTC=true
ARC=false
覆蓋系統時間檔案
cp -a /usr/share/zoneinfo/Asia/Shanghai /etc/localtime#2、開始安裝ntp伺服器
採用yum/rpm方式安裝
yum install ntp -y
檢視安裝是否成功
[root@linux-node1 ~]# rpm -qa ntp
 

ntp-4.2.6p5-10.el6.centos.1.x86_64

3、開始配置ntp伺服器

vim /etc/ntp.conf
下面為我修改的/etc/ntp.conf配置檔案，下面為大家解釋一部分引數的意思：
# 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         #預設是拒絕所有的ntp連線
 

restrict -6 default kod nomodify notrap nopeer noquery      #拒絕IP-V6的ntp連線

# 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                                          #這裡也可以允許單個ip進行對時服務 
 

restrict -6 ::1

# Hosts on local network are less restricted.
restrict 192.168.17.0 mask 255.255.255.0 nomodify notrap    #允許哪些網段可以使用這個ntp對時服務

# 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

server 2.cn.pool.ntp.org                                    #上層ntp伺服器
server time.nist.gov prefer
server 1.cn.pool.ntp.org 

4、時間同步伺服器上面的操作

[[email protected] ~]# /etc/init.d/ntpd restart
Shutting down ntpd:                                        [  OK  ]
Starting ntpd:                                             [  OK  ]

[[email protected] ~]# ntpq -p
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
+panel.gerardope 116.49.102.213   2 u   24   64    1  211.688  -17.119   0.122
*time-d.nist.gov .ACTS.           1 u   22   64    1  348.603    3.607   0.122
 static-5-103-12 .GPS.            1 u   22   64    1  311.951  -16.711   0.122

解釋：
*號的意思：表示正在使用的上層NTP
+號的意思：表示已經連線成功的，可提供替補的時間同步伺服器

5、客戶機上面的操作

檢視當前時間
[[email protected] ~]# date
Wed Jan 11 00:08:37 CST 2017
更新時間
[[email protected] ~]# ntpdate 192.168.17.23
23 Jan 20:33:13 ntpdate[27191]: step time server 192.168.17.23 offset 1110147.826055 sec
更新時間成功
[[email protected] ~]# date
Mon Jan 23 20:33:15 CST 2017

6、在Windows伺服器上面進行操作

如下圖所示：