[Unit]
Requires=roscore.service usb_cam.service 
After=NetworkManager.service usb_cam.service 

[Service]
Type=simple
User=hiwonder
Restart=always
RestartSec=5
KillMode=mixed
ExecStart=/home/hiwonder/ros/autostart/object_tracking.bash

[Install]
WantedBy=multi-user.target