How-to: Add Users to Groups in Ubuntu 11.10
Come 11.10, that goes away and all you can do is add or remove user accounts or change the account type (Standard or Administrator). Canonical: you upgraded something useful (nay, essential) out of existence!
How is this making Ubuntu easier to use and more desirable to the new users whom Mark Spaceshuttle is trying to attract in the millions? You just made a large number of us resort to a command line. Again. Back in the geek ghetto. How 'very Linux.' FAIL. Anyway, moving on...
Try setting up Virtualbox and Samba shares and see how far you get. If you want to add new or existing users to existing groups, it is impossible to do from the user account management dialog box.
Open a Terminal (Ctrl-Alt-T keyboard shortcut). The command to list all existing groups on your system is:
but <PRESS TAB KEY 3 TIMES, not enter
adm disk man rtkit tty
admin fax messagebus sambashare users
audio floppy mlocate saned utempter
avahi fuse netdev sasl utmp
avahi-autoipd games news scanner uucp
backup gnats nogroup shadow vboxusers
bin irc nopasswdlogin src vickip
bluetooth kmem operator ssh video
cdrom libuuid plugdev ssl-cert voice
colord lightdm proxy staff www-data
crontab list pulse sudo
daemon lp pulse-access sys
dialout lpadmin robin syslog
dip mail root tape
This is a list of the current groups on my system.
The command to add an existing user to an existing group follows the format:
sudo usermod -a -G GROUPNAME USERNAME
Replace <Groupname> with active group name and <Username> with an account name. For example:
sudo usermod -a -G samabashare robin
Being a command line, you don't get feedback. To verify success, run the command:
The username should appear on all groups the user is a member.
Perhaps Ubuntu 12.04 will restore the missing utility. Incidentally, there's an Xfce equivalent; for whatever reason, Canonical stripped it from the Unity 11.04 release. RC