Telling a deb from a snap, replacing a deb with the snap of the same program while keeping its settings, and getting a removed snap's data back from its snapshot.

Before you start

The lab changes nothing, but checks that the htop snap isn't installed. Reset puts the htop deb back if you had it (on Ubuntu Server, removing it also removes the ubuntu-server metapackage; reset puts that back too). The VM needs to reach the snap store. Write answers to the files in /root/lab-answers/.

Tasks

Find out whether Firefox on this machine is a deb or a snap. Write deb, snap or none (if it isn't installed, as on a server) to /root/lab-answers/1.
Install the htop deb, give it a setting (in htop, F2 Setup, Display options, turn on Tree view, then quit with F10), then replace it with the snap, keeping the setting.
Remove the htop snap and get its data back.

Hints

dpkg -l firefox shows the transitional 1snap1 version, a real version, or nothing; snap list firefox.
The deb keeps its settings in ~/.config/htop/htoprc. A snap sees its own home folder, ~/snap/htop/current/, which exists once you've run the snap. Copy the file to ~/snap/htop/current/.config/htop/.
snap remove htop saves a snapshot of its data; snap saved, snap install htop, snap restore SET. Then ls ~/snap/htop/*/.config/htop/ shows htoprc again.