Installing Guest addon in ubuntu

Before installing the guest addon install.

sudo apt-get install -y gcc make perl
sudo apt install linux-headers-$(uname -r) build-essential dkms
sudo /usr/bin/VBoxClient --clipboard

Reference https://superuser.com/questions/1318231/why-doesnt-clipboard-sharing-work-with-ubuntu-18-04-lts-inside-virtualbox-5-1-2

virtualbox addon depedency:

sudo apt-get install virtualbox-guest-utils virtualbox-guest-x11 virtualbox-guest-dkms vim vim-gtk emacs git