A Vagrantfile uses the Ruby language syntax but no knowledge of Ruby is required. It is a simple, expressive, and easy-to-understand language when using the Vagrantfile. In most cases you will simply be setting a variable and a value, such as config.vm.box = "ubuntu/trusty64" , which sets the box to ubuntu/trusty64, the 64-bit version of Ubuntu 14.04.

A Vagrantfile configuration is contained within the configure block. The first line is Vagrant.configure("2") do |config| and the last line is end. Within this block we can define all sorts of values, such as the Vagrant box, networking, filesystems, provisioning, and more.