Sample Vagrant file. This installs Ubuntu 12.04 (64 bit). The use of NFS in this manner requires your user's password (needs sudo access). This optionally also has my LAMP server provisioning script (PHP 5.5).

Vagrantfile-share-var-www.rb

# -*- mode: ruby -*-
# vi: set ft=ruby :

Vagrant.configure("2") do |config|
  
  config.vm.box = "precise64"

  config.vm.box_url = "http://files.vagrantup.com/precise64.box"

  config.vm.network :private_network, ip: "192.168.33.10"
  
  config.vm.synced_folder ".", "/var/www",
  
end

Vagrantfile.rb

# -*- mode: ruby -*-
# vi: set ft=ruby :

Vagrant.configure("2") do |config|
  
  config.vm.box = "precise64"

  config.vm.box_url = "http://files.vagrantup.com/precise64.box"

  config.vm.network :private_network, ip: "192.168.33.10"
  
  config.vm.synced_folder ".", "/vagrant",
            id: "core",
            :nfs => true,
            :mount_options => ['nolock,vers=3,udp,noatime']

  # Optionally provision PHP
  # config.vm.provision "shell", path: "https://gist.github.com/fideloper/7074502/raw/install.sh"
end

@Ilyes512 Just tested, and that specific line is giving me error when doing vagrant up.