Oracle VirtualBox:  https://www.virtualbox.org/

Vagrant: https://www.vagrantup.com/

Link to download VM images: http://osboxes.org/

Link to kubeadm installation instructions: https://kubernetes.io/docs/setup/independent/install-kubeadm/

The link to Vagrant file:
https://github.com/kodekloudhub/certified-kubernetes-administrator-course

If you are new to VirtualBox or Vagrant, please follow this pre-requisites course to learn about it: https://www.youtube.com/watch?v=Wvf0mBNGjXY