Added Hostname capability

Vagrantfile

@@ -29,6 +29,7 @@ Vagrant.configure(2) do |config|
 
         ip = "172.19.8.#{i+100}"
         node.vm.network "private_network", ip: ip
+        node.vm.hostname = hostname
 
         # Disabling compression because OS X has an ancient version of rsync installed.
         # Add -z or remove rsync__args below if you have a newer version of rsync on your machine.

vagrant_rancheros_guest_plugin.rb

@@ -12,14 +12,21 @@ end
 module VagrantPlugins
   module GuestLinux
     class Plugin < Vagrant.plugin("2")
+      guest_capability("linux", "change_host_name") do
+        Cap::ChangeHostName
+      end
+
       guest_capability("linux", "configure_networks") do
         Cap::ConfigureNetworks
       end
     end
+  end
+end
 
+module VagrantPlugins
+    module GuestLinux
         module Cap
             class ConfigureNetworks
-
                 def self.configure_networks(machine, networks)
                     machine.communicate.tap do |comm|
                         interfaces = []
@@ -48,3 +55,19 @@ module VagrantPlugins
         end
     end
 end
+
+module VagrantPlugins
+    module GuestLinux
+        module Cap
+            class ChangeHostName
+                def self.change_host_name(machine, name)
+                    machine.communicate.tap do |comm|
+                        if !comm.test("sudo hostname --fqdn | grep '#{name}'")
+                            comm.sudo("hostname #{name.split('.')[0]}")
+                        end
+                    end
+                end
+            end
+        end
+    end
+end