$ sudo sh -c 'echo "deb http://packages.ros.org/ros/ubuntu $(lsb_release -sc) main" > /etc/apt/sources.list.d/ros-latest.list'
$ sudo apt-key adv --keyserver"'hkp:/ OpenPGP Keyserver' --recv-keyC1CF6E31E6BADE8868B172B4F42ED6FBAB17C654
$ sudo apt-get update $ sudo apt-get install ros-melodic-desktop-full
$ sudo apt-get install python-pip $ sudo pip install rosdepc
$ sudo rosdepc init $ rosdepc update
$ echo "source /opt/ros/melodic/setup.bash" >>~/.bashrc $ source~/.bashrc
$ sudo apt-get install python-rosdep python-rosinstall python-rosinstall-generator python-wstool build-essential
$ roscore
$ rosrun turtlesim turtlesim_node
$ rosrun turtlesim turtle_teleop_key
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