[xubuntu-users] Interrupted release upgrade, how to complete?

[Chris Green]

The cat (not in my good books!) jumped on the keyboard of my laptop
while doing a do-release-upgrade from 15.10 to 16.04.

It happened while downloading the files.

I have run 'apt-get update' and 'apt-get upgrade' which ended up
producing a working system but it hasn't upgraded completely.  It
still has the 4.2.x kernelt for example.

Running 'apt-get update' and 'apt-get upgrade' again produces a huge
list of "The following packages have been held back", presumably I
need to get these to be installed as well to complete the upgrade.
How do I do this?

-- 
Chris Green