https://www.vagrantup.com/docs/vagrantfile/machine_settings.html
https://www.vagrantup.com/docs/vagrantfile/ssh_settings.html

Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
  config.ssh.insert_key = false

  config.vm.box = "centos-7.2"
  config.vm.box = "ubuntu/trusty64"

  # The url from where the 'config.vm.box' box will be fetched if it
  # doesn't already exist on the user's system.
  #config.vm.box_url = "file:///F:/vagrant-boxes/CentOS-6.4-x86_64-v20130731.box"

  config.vm.box_url = "centos-7.2.box"
  config.vm.hostname = "centos-7.2"

  config.vm.synced_folder ".", "/vagrant"
  config.vm.synced_folder "../../.", "/vagrant", :mount_options => ["dmode=777", "fmode=666"]

  #config.vm.boot_timeout = 300
  #config.vm.network "private_network", ip: "192.168.56.2"

  #config.ssh.username = "vagrant"
  #config.ssh.password = "vagrant"
  #config.ssh.private_key_path = "~/.ssh/id_rsa"

  config.vm.provider :virtualbox do |vb, override|
    vb.name = "centos-7.2"

    vb.vm.network "private_network", ip: "192.168.56.2"
    vb.vm.network :forwarded_port, guest: 2375, host: 2375

    vb.memory = 2048
    vb.customize ["modifyvm", :id, "--memory", "4096"]
    vb.customize ['modifyvm', :id, '--clipboard', 'bidirectional']

    # --cpuexecutioncap 50
    # intel card funciona no CentOS
    vb.customize ["modifyvm", :id, "--nictype2", "82540EM"]

    vb.vm.provision :shell,
    inline: 'PYTHONUNBUFFERED=1 ansible-playbook \
      /vagrant/ansible/dev.yml -c local'
  end

  config.vm.define :dev do |dev|
    # dev.vm...provision :shell, path: "bootstrap.sh"
  end

  if Vagrant.has_plugin?("vagrant-cachier")
    config.cache.scope = :box
  end
end

samples:
      config.vm.provision "prompt", type: "shell", inline: <<-SHELL
        cat \<\<PROMPT > /etc/profile.d/elasticsearch_prompt.sh
export PS1='#{name}:\\w$ '
PROMPT
        grep 'source /etc/profile.d/elasticsearch_prompt.sh' ~/.bashrc |
          cat \<\<SOURCE_PROMPT >> ~/.bashrc
# Replace the standard prompt with a consistent one
source /etc/profile.d/elasticsearch_prompt.sh
SOURCE_PROMPT
        grep 'source /etc/profile.d/elasticsearch_prompt.sh' ~vagrant/.bashrc |
          cat \<\<SOURCE_PROMPT >> ~vagrant/.bashrc
# Replace the standard prompt with a consistent one
source /etc/profile.d/elasticsearch_prompt.sh
SOURCE_PROMPT
      SHELL


  config.vm.define "opensuse-13" do |config|
    config.vm.box = "elastic/opensuse-13-x86_64"
    opensuse_common config
  end
  ...
  config.vm.defined_vms.each do |name, config|
    config.options[:autostart] = false
    ...
  end