Initial linux support

Author: SystemZ

vm/_template/Vagrantfile

@@ -9,6 +9,15 @@ Vagrant.configure("2") do |config|
 ### !!! CHANGE ME START !!!
   # Hostname inside of VM
   config.vm.hostname = "devzbox"
+  
+  # Libvirt (qemu-kvm) for Linux
+  config.vm.provider :libvirt do |lv, config|
+    lv.memory = 8*1024
+    lv.cpus = 8
+    lv.cpu_mode = 'host-passthrough'
+    lv.nested = true
+    lv.keymap = 'pt'
+  end
 
   # Hyper-V available on Windows Pro or higher
   config.vm.provider "hyperv" do |h|
@@ -33,7 +42,8 @@ Vagrant.configure("2") do |config|
     #}
 
 	# This on Hyper-V works only on Intel CPUs so far in 2020
-	# Needed if you want VM in VM setup
+	# Needed if you want VM in VM setup (nested virtualization)
+        # https://www.reddit.com/r/qemu_kvm/comments/jd1mug/amd_nested_virtualization_kvm_windows_10_guest/
 	#h.enable_virtualization_extensions = true
   end