Upfrading from Ubuntu 14.03 to Ubuntu 16.0

[Ralf Mardorf]

On Fri, 29 Jul 2016 22:49:33 -0400 (EDT), Robert Heller wrote:
>If you are using VirtualBox, I believe it saves the VM disk space in a
>special disk file and stores the VM's info in a configuration file of
>some sort.  You just need to keep those files between updates.  You
>should have stashed those files someplace other than the system file
>system eg on /home or someplace like /vmdata or whatever.  Some other
>file system than /.  

That's correct, IOW he has nothing else to do, than simply
keeping /home were by default at least the configuration is located and
the partition containing the virtual disk and snapshots, most
likely /home too.