After we do SSH from Workstation to TurtleBot's Netbook, and after running the following command in Turtlebot through SSH, roslaunch turtlebot_bringup minimal.launch

Why cant we run "roslaunch turtlebotteleop keyboardteleop.launch" by opening another SSH session with Netbook..? What is the need to run "roslaunch turtlebotteleop keyboardteleop.launch" from workstation and control robot..?