I just upgrade from ubuntu 16.04 to Ubuntu 18.04.
Before then end of the upgrade, it asked me if I want to delete obsoletes packages and packages installed automatically no more used.
I answered "no", because I need to keep some packages (php7.0). Now I migrated to the newer packages (php7.2) how do I retrieve and delete obsoletes packages ?
apt autoremove but it seems not to delete obsolete packages.
What is the command used by
do-release-upgrade to retrieve these packages ?