Managing groups

Started using dbus for opening different partitions on hard drive.
Suddenly had an issue with refused rights.
Had to add myself as user to the group dbus: sudo gpasswd -a paul dbus

Clear Arch-wiki section about managing groups:

List groups

Display group membership with the groups command:

$ groups [user]

If user is omitted, the current user's group names are displayed.

To list all groups on the system:

$ cat /etc/group

Manage group membership

Add users to a group with the gpasswd command:

# gpasswd -a [user] [group]

To remove users from a group:

# gpasswd -d [user] [group]

If the user is currently logged in, he/she must log out and in again for the change to have effect.

source: https://wiki.archlinux.org/index.php/Groups