So I installed ubuntu 14.04 from mini cd and added LXDE to it (nothing more) on Virtualbox.

I try to install guest additions and when clicking devices - add guest addition cd on virtualbox it throws "error, not authorized to perform operation" in ubuntu even though I can see the VBox_GAs_6-1-22 being in the "cd" drive.

When I try to open/mount/eject the media on ubuntu it throws the same error.

It feels like I don't have some root rights or smth? Even though when installing Ubuntu I made only my own account and I have no idea how to log in under anything else.

How could I get guest additions installed? It doesn't bother me that much but I want the copy/paste files between host system and VB to work.

Thanks!

To install guest additions I typically
cd to the mount point then run the command:

sudo sh VBoxLinuxAdditions.run

That worked, thanks!