I have installed ROS (jade) in ubuntu 14.04.2 LTS. Many of the demo packages mentioned in the tutorial are not being located by the installed ROS. Please let me know if I am missing some basic steps.
First I used $ sudo apt-get install ros-indigo-husky-navigation and it executed successfully. Then $ roslaunch husky_gazebo husky_playpen.launch produces following error. Error: [husky_playpen.launch] is neither a launch file in package [husky_gazebo] nor is [husky_gazebo] a launch file name The traceback for the exception was written to the log file.
Please point to the tutorials your following, and provide full instructions for how to reproduce as well as copy and paste of all the commands your running and their console outputs so we can help you better.