The packages to be updated are:
pparmor apparmor-utils libapparmor-perl libapparmor1 update-notifier
update-notifier-common
The error message is:
Requires installation of untrusted packages
The action would require the installation of packages from not authenticated
sources.
Why is this happening? It happens with other packages I try to install too,
like icetea.
Perhaps the problem is that I don't have any authentication certificates. I
looked in Software Sources, Authentication, trusted providers and nothing is
listed. I think I need to import some keys. If that is right, how do
I do this? How was I able to update before? Have my keys gone missing
somehow?
Thank you!