TinyOS on Ubuntu 12.04 update error, the fix

 TinyOS released the update to tinysos-tools package. However, if updating from GUI of update manager you will get an error

The action would require the installation of packages from not authenticated sources.

And update will be aborted. To fix it, simply open terminal and run

sudo apt-get update
sudo apt-get upgrade

You will get two warning, proceed by answering Y and you are done!