command = [enable, disable, start, stop, restart,status]

systemctl command yourServiceName.service

更新服务systemctl daemon-reload

例：

[Unit]
Description=ywhtcp
After=network.target

[Service]
Type=simple
User=root
Restart=on-failure
RestartSec=5s
ExecStart=/usr/local/python38/bin/python3 /ywhtcp.py
PrivateTmp=true

[Install]
WantedBy=multi-user.target

注：service只允许用绝对路径，就算全局python也不行