Vagrantfile for VirtualBox-based custom Ubutu Bionic box with GUI

ubutnu-bionic-gui.Vagrantfile

Vagrant.configure(2) do |config|
  # VM name for vagrant management.
  config.vm.define "my-vm"

  # Base VM image.
  config.vm.box = "ubuntu/bionic64"

  # Enlarge disk (will also convert the format from VMDK to VDI).
  # Requires: vagrant plugin install vagrant-disksize
  config.disksize.size = "50GB"

  config.vm.provider "virtualbox" do |vb|
    # Display the VirtualBox GUI when the machine is powered on.
    vb.gui = true

    # Set video memory size to 128 MB.
    vb.customize ["modifyvm", :id, "--vram", "128"]

    # Set RAM size to 4096 MB.
    vb.memory = 4096
  end

  # Sync the dir with shared files.
  config.vm.synced_folder './shared', '/home/vagrant/shared', SharedFoldersEnableSymlinksCreate: false

  # https://askubuntu.com/questions/1067929/on-18-04-package-virtualbox-guest-utils-does-not-exist
  config.vm.provision "shell", inline: "sudo apt-add-repository multiverse && sudo apt-get update"

  # Install xfce and virtualbox additions.
  config.vm.provision "shell", inline: "sudo apt-get install -y xfce4 virtualbox-guest-dkms virtualbox-guest-utils virtualbox-guest-x11"
  # Permit anyone to start the GUI.
  config.vm.provision "shell", inline: "sudo sed -i 's/allowed_users=.*$/allowed_users=anybody/' /etc/X11/Xwrapper.config"

  # Use LightDM login screen (=> not required to run "startx").
  config.vm.provision "shell", inline: "sudo apt-get install -y lightdm lightdm-gtk-greeter"
  # Install a more feature-rich applications menu.
  config.vm.provision "shell", inline: "sudo apt-get install -y xfce4-whiskermenu-plugin"

  # Other setup goes here...

  # Reboot.
  # Requires: vagrant plugin install vagrant-reload
  config.vm.provision :reload
end