RobotHubCourse outline

ROS 2 Lyrical Luth · Lesson 05 of 8

Launch, rosbag and diagnostics

Start complete systems, record data and investigate runtime behavior.

Estimated time · 45–75 min

Guided lesson

Work through these steps

  1. 1.

    Source the ROS 2 Lyrical environment in a fresh terminal.

  2. 2.

    Run the launch, rosbag and diagnostics inspection commands before creating code.

  3. 3.

    Build only the affected package, then source the workspace overlay.

  4. 4.

    Inspect the ROS graph and verify the result from a second terminal.

Example

Try it yourself

ros2 launch robot_bringup system.launch.py
ros2 bag record /scan /odom
ros2 doctor --report

Practical exercise

Apply the lesson

Create a minimal ROS 2 workspace demonstration for launch, rosbag and diagnostics, then prove it works with the ROS 2 CLI.

Before you continue

  • ROS_DISTRO reports lyrical
  • The workspace builds without errors
  • The expected node, topic, service, or action is visible in the graph