When I boot into Kubuntu 20.04, the Discover application launches and shows me a list of available updates. But when I go to the terminal and do an apt-get update followed by apt-get upgrade these software packages don't appear.
This is a new, stock installation. I haven't even installed git or vim! :)
They all look to be development-related: build-essential, binutils, fakeroot, gcc, etc.
None of these packages are installed, at least according to apt:
$ apt-cache policy binutils
binutils:
Installed: (none)
Candidate: 2.34-6ubuntu1
Version table:
2.34-6ubuntu1 500
500 http://us.archive.ubuntu.com/ubuntu focal/main amd64 Packages
Why are the lists different? I don't want conflicting installations between APT and Discover...