full screen ubuntu in an oracle vm

Day 1: Sort it.  A search, a line in the terminal, done.

Day 2:  New VM.  A search.  NO JOY.

Day 3:  New searches.  I find it again.

How can it be so damn hard?!

Anyway, in the VM: 

sudo apt-get install virtualbox-guest-dkms virtualbox-guest-utils virtualbox-guest-x11

Thank you. No big deal. No freaking mouse clicks. No idiocy.