(1ros introduction mainly explains the basic knowledge of ROS, gives users a general understanding of ROS, and briefly demonstrates ROS. 2cdrom device mainly introduces three device methods, including optical drive (ISO device), netinstall and img pattern device, and gho St pattern device netinstall device mainly introduces three device methods, including optical drive (ISO device), netinstall and img pattern device, gho St pattern device voice video? 3WHY is ROS promoted to ROS, promotion operation 4ros demotion, the difference between demotion and promotion and the demonstration of operation process 5introduction to the application of ROS management tools briefly introduces the four management tools of ROS, and the key points are required to grasp winbox)