Installing your personal dotfiles on each Vagrant VM you use

Vagrantfile

# Change this to suit your dotfiles setup and copy to your *HOST* machine: $HOME/.vagrant.d/Vagrantfile
Vagrant.configure(2) do |config|
  # Mount your dotfiles to vagrant user's home folder (or wherever you want):
  config.vm.synced_folder "#{ENV['HOME']}/dotfiles", '/home/vagrant/dotfiles'
  # Install dotfiles on every 'vagrant provision' call.
  # For example, let's imagine your your dotfiles have 'install.sh' script:
  config.vm.provision 'shell', privileged: false, inline: '/home/vagrant/dotfiles/install.sh'
end