Why folder synchronization in vagrant might not work?

Question

Vagrant

Why folder synchronization in vagrant might not work? It is also worth noting that for some reason, after launching (vagrant up), /var/www/html opens on localhost, although another docroot folder is specified in the configuration file.
Trying to set up a working environment in linux ubuntu 14.04...
Version vagrant 1.8.1 and VB 5.0.
Vagrantfile contents:
# -*- mode: ruby ​​-*-
dir = File.dirname(File.expand_path(__FILE__))
require 'yaml'
require "#{dir}/puphpet/ruby/deep_merge.rb"
require "#{dir }/puphpet/ruby/to_bool.rb"
require "#{dir}/puphpet/ruby/puppet.rb"
configValues ​​= YAML.load_file("#{dir}/puphpet/config.yaml")
provider = ENV['VAGRANT_DEFAULT_PROVIDER '] ? ENV['
if File.file?("#{dir}/puphpet/config-#{provider}.yaml")
custom = YAML.load_file("#{dir}/puphpet/config-#{provider}.yaml")
configValues. deep_merge!(custom)
end
if File.file?("#{dir}/puphpet/config-custom.yaml")
custom = YAML.load_file("#{dir}/puphpet/config-custom.yaml")
configValues. deep_merge!(custom)
end
data = configValues['vagrantfile']
Vagrant.require_version '>= 1.8.1'
Vagrant.configure("2") do |config|
config.vm.box = "hashicorp/precise64"
config.vm.synced_folder "/home/sergei/www/machine2", "/home"
end