$ cd ~/robot_ws/src
$ git clone https://github.com/robotpilot/ros2-seminar-examples.git
$ cd ~/robot_ws && colcon build --symlink-install

$ ros2 run my_first_ros_rclpy_pkg helloworld_subscriber
$ ros2 run my_first_ros_rclpy_pkg helloworld_publisher

$ ros2 run my_first_ros_rclcpp_pkg helloworld_subscriber
$ ros2 run my_first_ros_rclcpp_pkg helloworld_publisher

$ ros2 run topic_service_action_rclpy_example argument
$ ros2 run topic_service_action_rclpy_example operator
$ ros2 run topic_service_action_rclpy_example calculator
$ ros2 run topic_service_action_rclpy_example checker
$ ros2 run topic_service_action_rclpy_example checker -g 100
$ ros2 launch topic_service_action_rclpy_example arithmetic.launch.py

$ ros2 run topic_service_action_rclcpp_example argument
$ ros2 run topic_service_action_rclcpp_example operator
$ ros2 run topic_service_action_rclcpp_example calculator
$ ros2 run topic_service_action_rclcpp_example checker
$ ros2 run topic_service_action_rclcpp_example checker -g 100.0
$ ros2 launch topic_service_action_rclcpp_example arithmetic.launch.py

$ ros2 run time_rclpy_example time_example

$ ros2 run time_rclcpp_example time_example

$ ros2 run logging_rclpy_example logging_example

$ ros2 env
usage: ros2 env [-h] Call `ros2 env <command> -h` for more detailed usage. ...
Various env related sub-commands
optional arguments:
  -h, --help            show this help message and exit
Commands:
  list  Output a list of ROS environment variables
  set   Set ROS environment variables

$ ros2 env list -a
ROS_VERSION        = 2
ROS_DISTRO         = foxy
ROS_PYTHON_VERSION = 3
ROS_DOMAIN_ID      = 7
RMW_IMPLEMENTATION = rmw_fastrtps_cpp

$ ros2 run rqt_example rqt_example
$ ros2 launch rqt_example turtlesim.launch.py

$ ros2 launch testbot_description testbot.launch.py

$ ros2 run tf2_rclpy_example broadcaster
$ ros2 run tf2_rclpy_example listener
$ ros2 run tf2_rclpy_example static_broadcaster

$ rviz2 -d ${COLCON_WORKSPACE}/src/ros2-seminar-examples/tf2_rclcpp_example/rviz/arm.rviz

$ ros2 service call move std_srvs/srv/SetBool "data: false"

$ ros2 run tf2_rclcpp_example broadcaster
$ ros2 run tf2_rclcpp_example listener
$ ros2 run tf2_rclcpp_example static_broadcaster

$ rviz2 -d ${COLCON_WORKSPACE}/src/ros2-seminar-examples/tf2_rclcpp_example/rviz/arm.rviz

$ ros2 service call move std_srvs/srv/SetBool "data: false"

$ colcon build --symlink-install
$ mkdir ~/robot_ws/test_result
$ colcon test --test-result-base ./test_result/