how to fullscreen virtualbox code example

Example 1: virtualbox fullscreen resolution

sudo apt-get install virtualbox-guest-dkms
sudo dpkg-reconfigure virtualbox-guest-dkms

Example 2: how to get full screen in virtualbox

Right Ctrl + F

Example 3: virtualbox fullscreen resolution

Go to the VirtualBox options while in your VM (the same place you went to to install Guest Additions) and select View -> Auto-resize Guest Display. This should automatically set your VM's resolution to the proper screen size.