$script = <<-SHELL
printf zzz > /home/vagrant/aaa.txt
sudo printf > /home/vagrant/bbb.txt
sh -c "printf > /home/vagrant/ccc.txt"
sudo sh -c "printf > /home/vagrant/ddd.txt"
SHELL

Vagrant.configure("2") do |config|
    config.vm.box = "laravel/homestead"
    config.vm.provision "shell", inline: $script
end