centos下NTP离线安装及配置

以离线环境下任意服务器为例，如10.160.11.148为服务端server配置，10.160.11.147为客户端client配置。

# 找一台本地可联网服务器，进行安装包的download
yum -y install ntp --downloadonly --downloaddir /root/ntp
tar -zcvf ntp.tar.gz ntp/

# 在ntp服务器server端
cd ntp
rpm -ivh *.rpm --force --nodeps
vi /etc/ntp.conf
-------------------添加
# 允许IPV4 IPV6 查询 拒绝修改
restrict -4 default kod notrap nomodify
restrict -6 default kod notrap nomodify
# 如果联不通外网，则把上面几行注释，然后添加下面两行，意思是设置成时间服务器是自己
server 127.127.1.0
fudge 127.127.1.0 stratum 8
# 注释掉以下行
# 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
----------------------------------------------
service ntpd restart
systemctl disable chronyd.service
systemctl enable ntpd.service
ntpstat

# 在ntp客户client端
cd ntp
rpm -ivh *.rpm --force --nodeps
vi /etc/ntp.conf
------------------------------
restrict -4 default kod notrap nomodify
restrict -6 default kod notrap nomodify
server 10.160.11.148
fudge 10.160.11.148 stratum 8
---------------------------
service ntpd restart
systemctl disable chronyd.service
systemctl enable ntpd.service
ntpstat
ntpdate -u 10.160.11.148