What happen if I install VirtualBox Guest Additions on a host?

I have a bootable USB drive with Ubuntu installed.

This morning I Installed VirtualBox and booted my Ubuntu drive in a VM. I then installed the guest additions in Ubuntu.

My question/curiosity is, what would happen if I boot the drive again outside of the VirtualBox VM, using a physical computer?

Will my Ubuntu work normally or is something going to change?

Solution 1:

All the Virtualbox Guest Additions are is a set of drivers/kernel module that allow the guest OS to talk and take advantage of the features of the VM "hardware". If you boot the USB drive outside of the VM, the hardware is going to appear different so, aside from some configuration changes (usually display and network), it should work normally.