Vagrant and VirtualBox install on Ubuntu 18

https://websiteforstudents.com/install-the-latest-virtualbox-on-ubuntu-18-04-lts/
https://stegard.net/2016/10/virtualbox-secure-boot-ubuntu-fail/
1. Add the VirtualBox repository key:

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

2. Add the VirtualBox repository

sudo sh -c 'echo "deb http://download.virtualbox.org/virtualbox/debian $(lsb_release -sc) contrib" >> /etc/apt/sources.list.d/virtualbox.list'

3. Install some required packages

sudo apt update
sudo apt-get -y install gcc make linux-headers-$(uname -r) dkms