## 1. 安裝ntp 在線安裝：`yum install ntp -y` 離線安裝： 根據實際環境下載(按以下順序安裝rpm) `autogen-libopts-5.18-5.el7.x86_64.rpm` `ntpdate-4.2.6p5-29.el7.centos.2.x86_64.rpm` `ntp-4.2.6p5-29.el7.centos.2.x86_64.rpm` ## 2. ntp服務端配置 ``` restrict 127.0.0.1? restrict ::1 # Hosts on local network are less restricted. #restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap restrict 192.168.0.0 mask 255.255.254.0 nomodify notrap // 根據實際情況修改 # 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 0.cn.pool.ntp.org server 1.cn.pool.ntp.org server 2.cn.pool.ntp.org server 3.cn.pool.ntp.org restrict 0.cn.pool.ntp.org nomodify notrap noquery restrict 1.cn.pool.ntp.org nomodify notrap noquery restrict 2.cn.pool.ntp.org nomodify notrap noquery restrict 3.cn.pool.ntp.org nomodify notrap noquery server 127.0.0.1 # local clock fudge 127.0.0.1 stratum 10 #broadcast 192.168.1.255 autokey?? ?# broadcast server ``` ## 3. ntp客戶端配置 ``` #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 192.168.0.92 restrict 192.168.0.92 nomodify notrap noquery server 127.0.0.1 # local clock fudge 127.0.0.1 stratum 10 #broadcast 192.168.1.255 autokey?? ?# broadcast server ``` ## 4.補充 ``` systemctl enable ntpd // 設置開機自啟動 systemctl start ntpd // 啟動服務 ntpq -p // 查看網絡中的NTP服務器 ntpstat // 查看時間同步狀態，需要等幾分鐘才能看到同步信息。 // 需要將所有host設置在同一時區 // inappropriate address 127.0.0.1 for the fudge command, line ignored // 將/etc/ntp.conf里的 fudge 改為 Fudge ```