Install headless VirtualBox and Vagrant for Ubuntu 14.04 Server

gistfile1.sh

wget -q -O - http://download.virtualbox.org/virtualbox/debian/oracle_vbox.asc | sudo apt-key add -
sudo sh -c 'echo "deb http://download.virtualbox.org/virtualbox/debian precise non-free contrib" >> /etc/apt/sources.list.d/virtualbox.org.list'
sudo apt-get update
sudo apt-get install linux-headers-$(uname -r) build-essential virtualbox-4.3 dkms
cd /tmp
wget http://download.virtualbox.org/virtualbox/4.3.20/Oracle_VM_VirtualBox_Extension_Pack-4.3.20-96996.vbox-extpack
sudo VBoxManage extpack install Oracle_VM_VirtualBox_Extension_Pack-4.3.20-96996.vbox-extpack
wget https://dl.bintray.com/mitchellh/vagrant/vagrant_1.7.2_x86_64.deb
sudo dpkg -i vagrant_1.7.2_x86_64.deb