ERROR: cannot launch node of type [robot_state_publisher/state_publisher]: robot_state_publisher问题解决

运行命令 $ roslaunch mbot_description display_mbot_base_urdf.launch出现以下错误 解决办法 $ sudo apt-get install ros-melodic-robot-state-publisher 之后重新运行会出现rviz节点报错: ERROR: cannot launch node of type [rviz/rviz]: rv
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