Install turtlebot3 in Ros Melodic and use with Gazebo

install_turtlebot3.sh

#!/bin/bash
### Instalation

# Go to catkin src directory:
cd ~/catkin_ws/src/

# Source setup.bash
source ../devel/setup.bash

# Clone repositories for turtlebot and dependencie of msgs:
git clone https://github.com/ROBOTIS-GIT/turtlebot3_msgs.git
git clone https://github.com/ROBOTIS-GIT/turtlebot3_simulations.git
git clone https://github.com/ROBOTIS-GIT/turtlebot3.git

# Compile code:
cd ~/catkin_ws && catkin_make

### Execution

# Source setup.bash
source devel/setup.bash

# Execute turtlebot3 in Gazebo. Model can be waffle_pi or burger.
export TURTLEBOT3_MODEL=burger
roslaunch turtlebot3_gazebo turtlebot3_empty_world.launch