turtlebot packages could't be found
Hello,
I would like to install turtlebot on my Ubuntu 14.04.3 LTS. After installing ROS, I entered the following code into the terminal:
sudo apt-get install ros-indigo-turtlebot ros-indigo-turtlebot-apps ros-indigo-turtlebot-interactions ros-indigo-turtlebot-simulator ros-indigo-kobuki-ftdi ros-indigo-rocon-remocon ros-indigo-rocon-qt-library ros-indigo-ar-track-alvar-msgs
And I received this reply:
E: package ros-indigo-turtlebot could't be found.
E: package ros-indigo-turtlebot-apps could't be found.
E: package ros-indigo-turtlebot-interactions could't be found.
E: package ros-indigo-turtlebot-simulator could't be found.
E: package ros-indigo-kobuki-ftdi could't be found.
E: package ros-indigo-rocon-remocon could't be found.
E: package ros-indigo-rocon-qt-library could't be found.
E: package ros-indigo-ar-track-alvar-msgs could't be found.
What do I need to do to install turtlebot?
With best regards