时间对于任何系统至关重要，无论Linux系统，Windows系统，网络设备等。 ## 日期时间 查询日期时间 ``` timedatectl ``` 查询时区 ``` timedatectl list-timezones timedatectl list-timezones | grep -i asia timedatectl list-timezones | grep -i shanghai ``` 设置时区 ``` timedatectl set-timezone Asia/Shanghai ``` ## 时间服务 查询chrony ``` yum info chrony ``` 安装和配置chrony服务 ``` yum install chrony -y systemctl start chronyd systemctl enable chronyd systemctl status chronyd ``` 配置文件/etc/chrony.conf ``` # 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 省略... ```