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The following solution worked for me on Ubuntu 16.04, trying to install the Clearpath Robotics ROS Kinetic Libraries.

Step 1 - Check the Sources List has Referenced to the ROS Packages Within your sources.list file, ensure you have deb http://packages.ros.org/ros/ubuntu xenial main.

You can view your sources.list file using the command below in the terminal:

sudo nano /etc/apt/sources.list

If it's not in there, create a new line with the ROS address as above, and then save and exit.

Step 2 - Do a sudo apt-get-update Bring in the new libraries by executing the following.

sudo apt-get update

At this point, my sudo apt-get update failed, this was because I was missing a ROS Package Key that needed to be added.

If you do get an error, it may look like this:

W: GPG error: http://packages.ros.org/ros/ubuntu xenial InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY F42ED6FBAB17C654 W: The repository 'http://packages.ros.org/ros/ubuntu xenial InRelease' is not signed. N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use. N: See apt-secure(8) manpage for repository creation and user configuration details.

If so, proceed to step 3.

Step 3 - Adding your ROS Key In your terminal run the following command: sudo apt-key adv --keyserver 'hkp://keyserver.ubuntu.com:80' --recv-key C1CF6E31E6BADE8868B172B4F42ED6FBAB17C654

Step 4 - Run another sudo apt-get update

As the title suggests, run sudo apt-get update.

Step 5 - Install ROS Kinetic for the Husky

sudo apt-get install ros-kinetic-husky-desktop sudo apt-get install ros-kinetic-husky-simulator

This worked for me. Hope it works!