download virtualbox for ubuntu 20.04 code example
Example 1: install virtualbox ubuntu 20 wsl command line
sudo apt-add-repository "deb http://download.virtualbox.org/virtualbox/debian $(lsb_release -sc) contrib"
Example 2: virtualbox in ubuntu 20.04
# install oracle Virtualbox in Ubuntu 20.04
sudo apt update
sudo apt install virtualbox virtualbox-ext-pack