I tried to follow the instructions here: Why does a Ubuntu guest in VirtualBox run very, very slowly?
However, I cannot get sudo ./VBoxLinuxAdditions.run to work as it says ./VBoxLinuxAdditions.run not found, even though I already tried sudo apt-get install virtualbox-guest-utils and restarted. And when I type /usr/lib/nux/unity_support_test -p, it still says Utiliy 3D is not supported and a bunch of lines with OpenGL warning: [..] not found in mesa table. What is going on?
