1.ros2bag
ros2 bag play my_bagfile --remap old_topic:=new_topic
参考:https://answers.ros.org/question/345960/rosbag2-remap-topic/
2.launch
直接改node的名字
3.topic
ros2 run turtlesim turtlesim_node --ros-args --remap __node:=my_turtle
参考:https://blog.csdn.net/qq_29923461/article/details/120361502