##Installing Virtualbox:
$ sudo apt-get install virtualbox
$ sudo apt-get install virtualbox-dkms
##Installing Vagrant:
$ sudo apt-get install vagrant
$ vagrant box add ubuntu/trusty64 https://vagrantcloud.com/ubuntu/boxes/trusty64/versions/14.04/providers/virtualbox.box --provider virtualbox
mkdir vagrant_projects; cd vagrant_projects
vagrant init ubuntu/trusty64
vagrant up
Connect to the box using
vagrant ssh