ROS2のtutorialsで誤記が散見されてるらしいので(official Git pull requestより)ここにmemo
Building an Action
# Source our workspace
# On Windows: call install/setup.bat
. install/setup.bash
# Check that our action definition exists
ros2 interface show action_tutorials/action/Fibonacci
正しくは最終行は下記
ros2 action show tutorials/action/Fibonacci