Agreed. A note that this only applies to Debian based distros would be good. Also have some example of package managers for other mainstream distros and an exam

Agreed. A note that this only applies to Debian based distros would be good. Also have some example of package managers for other mainstream distros and an example of what to search for for looking up your distro's package manager. As someone who started on Debian, it was a hump to get over to realize which software was Debian specific. Best to get that out of the way early.