Install the turtlebot3 on your computer. Follow instructions 1.1.1 - 1.1.5 in the following: https://emanual.robotis.com/docs/en/platform/turtlebot3/quick-start/ Install simulation files: $ cd ~/YOUR_ws/src/ $ git clone -b melodic-devel https://github.com/ROBOTIS-GIT/turtlebot3_simulations.git $ cd ~/YOUR_ws && catkin_build Read more in : https://emanual.robotis.com/docs/en/platform/turtlebot3/simulation/