ROS Control TurtleSim

Should run three terminals.

$ roscore
...
started core service [/rosout]

$ rosrun turtlesim turtlesim_node
[ INFO] [1531809691.854791711]: Starting turtlesim with node name /turtlesim
[ INFO] [1531809691.926926757]: Spawning turtle [turtle1] at x=[5.544445], y=[5.544445], theta=[0.000000]

$ rosrun turtlesim turtle_teleop_key
Reading from keyboard
---------------------------
Use arrow keys to move the turtle.

Finish !

Check rqt_graph

Open new terminal and run below.

$ rosrun rqt_graph rqt_graph