There are a few questions.The environment is Centos7

1.I tyied use qt creator ,new qt console application,Create a new project TEST,create TEST.service,Then start it with this command.
systemctl start TEST.service。
It can run normally.why? Qtservice Function？

2.Qtservice Can you provide a simple QT creator project? Just print the log.Or loop out UDP messages.Just need to be able to start it with a command.

systemctl start *.service

I've tried many times.It just won't start it with a command.
Please forgive me, I may not know much about this.

Thanks a lot.