【NTP时间同步】Centos7离线安装 NTP 服务

NTP 时间同步

配置的NTP服务IP地址：172.17.3.11

下载离线安装包

离线安装 NTP 服务，下载链接：
https://mirrors.aliyun.com/centos/7.9.2009/os/x86_64/Packages/ntp-4.2.6p5-29.el7.centos.2.x86_64.rpm
https://mirrors.aliyun.com/centos/7.9.2009/os/x86_64/Packages/ntpdate-4.2.6p5-29.el7.centos.2.x86_64.rpm
https://mirrors.aliyun.com/centos/7.9.2009/os/x86_64/Packages/autogen-libopts-5.18-5.el7.x86_64.rpm

安装
rpm -ivh autogen-libopts-5.18-5.el7.x86_64.rpm
rpm -ivh ntpdate-4.2.6p5-29.el7.centos.2.x86_64.rpm
rpm -ivh ntp-4.2.6p5-29.el7.centos.2.x86_64.rpm 

修改配置文件 /etc/ntp.conf

server 172.17.3.11 iburst

启动服务

systemctl enable ntpd
systemctl start ntpd
systemctl status ntpd

systemctl restart ntpd
# 停止
systemctl stop ntpd

## 手动同步, 停止 ntp 服务后执行（否则会报the NTP socket is in use, exiting）
ntpdate 172.17.3.11