This question already has an answer here:
Is there a list of packages that are installed on a fresh install?
I know, there is the other question How do I list the default installed packages? But that doesn't show, what will be the output of
dpkg --get-selections | grep -v deinstall | cut -f 1
right after a fresh install of Ubuntu desktop?
I would like to compare the resulting remaining list with the packages I have installed at the moment, so I can find out, what changed on the system since install.