roscore
(new shell)
rosrun turtlesim turtlesim_node
[ INFO] [1505445824.103304942]: Starting turtlesim with node name /turtlesim
[ INFO] [1505445824.112405654]: Spawning turtle [turtle1] at x=[5.544445], y=[5.544445], theta=[0.000000]
(new shell)
rosrun turtlesim turtle_teleop_key
Reading from keyboard
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Use arrow keys to move the turtle.
(new shell)
rosrun rqt_graph rqt_graph