My CentOS wiki name: MVieira I'd like to suggest a small update to the page http://wiki.centos.org/HowTos/Virtualization/VirtualBox where it reads "usermod -G vboxusers username" could be updated to "usermod -a -G vboxusers username" The reason being, usermod -G will add the user to the new supplimentary group but will also remove the same user from any other supplementary groups he/she might be part of. While adding the argument "-a" will append the group list instead. Regars Marcos Vieira