- roscd beginner_tutorials 時提示beginner_tutorials不是一個package
解決:在ros_workspace[實際路徑]下再次source ./devel/setup.h
- rosmsg show Num 時提示could not find msg Num
解決:export ROS_PACKAGE_PATH=~/catkin_ws/src/tutorials:$ROS_PACKAGE_PAT
~/catkin_ws/src/tutorials爲自己package的實際路徑