Is there a simple way to do-release-upgrade from 14 -> 16 and not from 14 -> 18? The default behavior of do-release-upgrade is from 14 (trusty) to 18 (bionic) directly. This is giving me trouble and is also not my intention. There are no resources that I have found to specify update version.
I would prefer not to just do clean install, as I have files in /opt/ and /etc/ that I would like to keep.
