Try the following at a terminal window in the host system
sudo apt-get install linux-headers-generic build-essential dkms sudo apt-get remove --purge virtualbox-dkms sudo apt-get install virtualbox-dkms
sudo !! – re-run previous command with ‘sudo’ prepended
ctrl-k, ctrl-u, ctrl-w, ctrl-y – cutting and pasting text in the command line
practical kill/yank example
use ‘less +F’ to view logfiles, instead of ‘tail’ (ctrl-c, shift-f, q to quit)
ctrl-x-e – continue editing your current shell line in a text editor (uses $EDITOR)
alt-. – paste previous command’s argument (useful for running multiple commands on the same resource)
reset – resets/unborks your terminal