编写systemd service文件
https://blog.csdn.net/djskl/article/details/46671453
如何编写一个Systemd Service
https://segmentfault.com/a/1190000014740871
https://unix.stackexchange.com/questions/506347/why-do-most-systemd-examples-contain-wantedby-multi-user-target/506374