Searched high and low and cannot find a solution, if there is one and i have missed it was just overlooked not down to being lazy. trying to install libsdl package for nova with this:- $ sudo gainroot $ apt-get update $ apt-get install libsdl-net1.2 and i am getting this message:- WARNING: The following packages cannot be authenticated! libsdl-net1.2 Install these packages without verification [y/n] ? If i press yes or no it makes no difference the game will not load. Any ideas ?