How to install nav2d packages
I have installed the nav2d from http://wiki.ros.org/nav2d by using: sudo apt-get install ros-indigo-nav2d and then I have to install additional packages, but it dos not work! I use for example: sudo apt-get install stage_ros but get this output:
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package stage_ros
Can anyone help to how can I install these packages ?