이 글은 아래의 자료를 참고로 만들어졌습니다. https://docs.ros.org/en/dashing/Tutorials/Ros2bag/Recording-And-Playing-Back-Data.html Recording and playing back data — ROS 2 Documentation: Dashing documentation You can also record multiple topics, as well as change the name of the file ros2 bag saves to. The -o option allows you to choose a unique name for your bag file. The following string, in this case subset, is..