I'm a sudoer on my workstation and also have the root password, but the Ubuntu Software Center doesn't let me install as it only lists a bunch of other users that are able to authenticate.
How do I grant myself the
org.debian.apt.install-or-remove-packages "Action" that the details suggest I need? Some other post pointed me to
/usr/share/polkit-1/actions/org.debian.apt.policy, but nothing in there is specifically referring to the four other users that the Authenticate dialog lists.
As an aside (not really the answer I'm looking for, but still of-interest), is there some way to get a package name from the Software Center that I can then install with
apt-get via the prompt?