centos7安装ntp

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步骤1：安装 NTP

安装 NTP：

Bash

yum install ntp

步骤2：配置 NTP

编辑 /etc/ntp.conf 文件，并按照以下示例进行配置：

Bash

# Use servers from the NTP Pool Project.
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

# By default, exchange time with everybody, but don't allow configuration.
restrict -4 default kod notrap nomodify nopeer noquery limited
restrict -6 default kod notrap nomodify nopeer noquery limited

# Local users may interrogate the ntp server more closely.
restrict 127.0.0.1
restrict ::1

# Needed for adding pool entries
restrict source notrap nomodify noquery

步骤3：启动 NTP

启动 NTP 服务：

Bash

systemctl start ntpd

并使 NTP 服务随系统启动：

Bash

systemctl enable ntpd

步骤4：检查 NTP

等待一段时间后，可以使用 ntpq -p 命令检查 NTP 状态：

Bash

ntpq -p

如果一切正常，则应该会看到类似以下内容的输出：

Bash

     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
*0.centos.pool. .POOL.          16 p    -   64    0    0.000    0.000   0.000
+ntp2.hostings. 172.31.16.58     3 u   18   64    1    0.492   -0.252   0.024
-2.centos.pool. .POOL.          16 p    -   64    0    0.000    0.000   0.000
+3.centos.pool. .POOL.          16 p    -   64    0    0.000    0.000   0.000