sudo apt-get ros-groovy-joystick-drivers [sudo] password for liqiming: E: Invalid operation ros-groovy-joystick-drivers
sudo apt-get ros-groovy-joystick-drivers [sudo] password for liqiming: E: Invalid operation ros-groovy-joystick-drivers why?
BTW: your tags say *fuerte*, while you're trying to install *groovy* packages.