install from Oracles repo

https://itsfoss.com/install-virtualbox-ubuntu/


add key for repo 

    wget -q https://www.virtualbox.org/download/oracle_vbox_2016.asc -O- | sudo apt-key add -

add virtualbox to list of repositories

    sudo add-apt-repository "deb [arch=amd64] http://download.virtualbox.org/virtualbox/debian $(lsb_release -cs) contrib"

`apt-get install virtualbox-6.1`

vboxmanage is the cli program