Installing VirtualBox on Debian 10 / Debian buster / buster-backports / fasttrack

Page Whonix for Windows, macOS, Linux inside VirtualBox and Whonix for Windows, macOS, Linux inside VirtualBox was updated just now to add:

Recommended VirtualBox version: 6.1.6

The version number will be updated in the wiki (not here!) when possible.

Dedicated chapter Recommended Version has an elaborate footnote:

Whonix ™ 15.0.1.3.4 was built and tested with VirtualBox version 6.1.6 . Newer VirtualBox are untested by Whonix ™ developers and can cause issues such as instability (VirtualBox suddenly closing, host freezing, black screen).

Newer VirtualBox versions are hard to install on Debian buster . Perhaps the VirtualBox host software is available (even as a Debian package) but VirtualBox guest additions are not available as a Debian package. Using an older version of VirtualBox guest additions (such as the pre-installed ones) might lead to broken functionality such as inability to resize the VM or instability. Installation of VirtualBox guest additions from ISO might also cause issues. [archive]

Therefore we are stuck with VirtualBox version 6.1.6 .

References: