I'd like Software Center, Update Manager and some other system management applications to work without asking for password (like sudo does if configured with NOPASSWD) but only asking for a confirmation instead, or even without any confirmation. At the same time I wouldn't like to use no user password at all. Is this reachable?
Ubuntu Software Center authorization uses policy kit. When requested for the authentication during the remove action you can expand the "Details" pointer to see the action that is being invoked. It's org.debian.apt.install-or-remove-packages . You can change the corresponding policy to not request for authentication:
/usr/share/polkit-1/actions/org.debian.apt.policy, search for
org.debian.apt.install-or-remove-packages, then find for the
defaults section, replace
These methods with NOPASSWD: ALL seem to result in no password being asked. this is not what I want. I want to be asked the ROOT password.
Seems the right hint was to add "Defaults rootpw" to sudoers. At least Synaptic now starts after receiving the root password. Nice. I can use Ubuntu the Debian way :)