这似乎是fedora的问题，有一个名为"chrony"的服务，该服务可防止ntpd服务在启动后启动.使用 yum 删除chrony后，启动后将启动ntpd服务.有关更多详细信息，您可以检查此.

This appears to be an issue with fedora, there is a service named "chrony" which prevents ntpd service to start after boot. After removing chrony with yum, ntpd service is started after boot. For more details you can check this.

更新:您还可以禁用在端口123上运行的 chronyd ，然后ntpd将启动:

UPDATE: You can also disable the chronyd that runs on port 123 and then ntpd will start:

sudo systemctl disable chronyd
sudo systemctl start ntpd