$ sudo apt install tree

$ mkdir -p catkin_ws/src # Create mutil-level directory

$ cd catkin_ws/ 
$ catkin_make      #Initialization
$ catkin_create_pkg package_name     #create a package
$ catkin_create_pkg package_name  Dependency_name  #create a package

$ git clone https://github.com/DroidAITech/ROS-Academy-for-Beginners.git #

$ cd ~/catkin_ws
$ rosdep install --from-paths src --ignore-src --rosdistro=kinetic -y

$ catkin_make  #如果前面已經做過一次，那麼這一次不用執行
$ source ~/catkin_ws/devel/setup.bash # 每次開一個新終端都要執行一次
$ echo "source ~/catkin_ws/devel/setup.bash " >> ~/.bashrc  #把上面的命令寫入.bashrc,每次開一個終端自動運行。