centos7校准时间

CentOS 7校准时间–NTP

安装NTP

sudo yum -y install ntp

使用 ntpdate 测试 NTP

ntpdate pool.ntp.org

查看服务器时间

date

启动ntpd daemon,持续校准时间

systemctl start ntpd

查看ntpd daemon是否启动

[root@localhost ~]# systemctl status ntpd
 ntpd.service - Network Time Service
    Loaded: loaded (/usr/lib/systemd/system/ntpd.service; disabled; vendor preset: disabled)
    Active: active (running) since Mon 2017-09-11 15:37:23 CST; 1h 49min ago
    Process: 12142 ExecStart=/usr/sbin/ntpd -u ntp:ntp $OPTIONS (code=exited, status=0/SUCCESS)
    Main PID: 12143 (ntpd)
    Memory: 624.0K
    CGroup: /system.slice/ntpd.service
    12143 /usr/sbin/ntpd -u ntp:ntp -g

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