On Wednesday, March 21, 2018 07:44:35 AM The Wanderer wrote: > In my experience, when (what I think Debian officially calls) a conffile > has been locally modified, the upgrade process (by default) halts and > presents a prompt asking the user what to do; the options include "show > a diff of the contents", "background the install so other actions can be > taken", "keep the locally-modified version", and "replace the local > version with the package's version". I think there's an apt config > option to affect this, but I don't know what it is or exactly where to > find out.
To the OP (and all), it is probably obvious to all concerned, but, just as reminder, being uncertain about whether the upgrade process proceeds as described above ("halts and presents a prompt ..."), I would make a backup of the modified conf file and store it somewhere safe (rename and or move to a directory).