1. IP settingwired connected -> wired settings -> New Profile -> IPv4 -> Manual -> Address, Netmask setting.2. install velodyne package.$ sudo apt-get install ros-melodic-velodyne$ cd /home/catkin_ws/src$ git clone https://github.com/ros-drivers/velodyne.git$ caatkin_make3. run.$ roslaunch velodyne_pointcloud VLP16_points.launch$ rosrun rviz rviz -f velodyne4. rvizadd -> PointCloud2 ->topic -> ..
