On Tue, 15 Nov 2016 21:49, m.roth at ... wrote: > > Can someone explain to me the logic that I, as a user, cannot, by default, > mount a DVD from the command line, but I can mount it via dolphin? Dolphin (and consorts) call "udisks" via messagebus / udev protocoll, and thus get the permission / rights to do it without direct "root rights" You can do that manually fron the commandline via the "udisksctl" tool. See "man udisksctl" for details. - Yamaban. PS: No, the question was not dumb, that udev stuff fools me up from time to time to.