Merge remote-tracking branch 'origin/doc/7143-virtualization' into doc/7143-virtualization

wiki/src/doc/advanced_topics.index.mdwn

   - [[!traillink Protection_against_cold_boot_attacks|advanced_topics/cold_boot_attacks]]
   - [[!traillink Virtualization|advanced_topics/virtualization]]
+    - [[!traillink <span_class="application">VirtualBox</span>|advanced_topics/virtualization/virtualbox]]
+    - [[!traillink <span_class="application">GNOME_Boxes</span>|advanced_topics/virtualization/boxes]]
+    - [[!traillink <span_class="application">virt-manager</span>|advanced_topics/virtualization/virt-manager]]
   - [[!traillink Enable_a_wireless_device|advanced_topics/wireless_devices]]

wiki/src/doc/advanced_topics/virtualization.caution.mdwn

+<div class="caution">
+
+Running Tails inside a virtual machine has [[various security
+implications|virtualization#security]]. Depending on the host operating system and your security
+needs, running Tails in a virtual machine might be dangerous.
+
+</div>

wiki/src/doc/advanced_topics/virtualization/boxes.mdwn

@@ -4,6 +4,8 @@
 interface to create and use virtual machines for Linux with GNOME.
 *GNOME Boxes* does not allow to use a persistent volume.
 
+[[!inline pages="doc/advanced_topics/virtualization.caution" raw="yes"]]
+
 <div class="note">
 
 <p>In Debian Wheezy, Ubuntu 14.04, and earlier,

wiki/src/doc/advanced_topics/virtualization/virt-manager.mdwn

@@ -5,6 +5,8 @@ virtualization solution for Linux. *virt-manager* has a more complex
 interface than *VirtualBox* or *GNOME Boxes* but it also has a more
 complete set of features.
 
+[[!inline pages="doc/advanced_topics/virtualization.caution" raw="yes"]]
+
 <div class="tip">
 
 <span class="application">virt-manager</span> is the only virtualization

wiki/src/doc/advanced_topics/virtualization/virtualbox.mdwn

@@ -4,6 +4,8 @@ It is possible to run Tails in a virtual machine using [<span
 class="application">VirtualBox</span>](https://www.virtualbox.org/) from a
 Windows, Linux, or Mac OS&nbsp;X host operating system.
 
+[[!inline pages="doc/advanced_topics/virtualization.caution" raw="yes"]]
+
 <span class="application">VirtualBox</span> has a free software version,
 called <span class="application">VirtualBox Open Source Edition</span>
 and some proprietary components, for example to add support for USB
@@ -23,6 +25,10 @@ though it does not allow to use a persistent volume.
 <span class="application">VirtualBox</span> you can access files of your
 host system from within the guest system.</p>
 
+<p>Make sure to understand the security implications of [[accessing
+internal hard disks|encryption_and_privacy/your_data_wont_be_saved_unless_explicitly_asked]]
+from Tails before using this feature.</p>
+
 </div>
 
 Security considerations for Windows and Mac OS X