[Unit]
Description=dynamic dns service
Wants=systemd-networkd.service

[Service]
Type=forking
ExecStart=su - ymq -c "/home/ymq/py/ydns/script/run.sh &"
ExecStop=su - ymq -c "/home/ymq/bin/killname ydns/script/run.sh"
[Install]
WantedBy=multi-user.target