zlthaha

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                                            zlthaha

ERROR: cannot launch node of type [segnet_ros/segnet_action_server]: Cannot locate node of type [segnet_action_server] in package [segnet_ros]. Make sure file exists in package path and permission is set to executable (chmod +x)

执行（chmod +x）

ERROR: Error response from daemon: Unknown runtime specified nvidia

You may not have NVIDIA docker2 installed