How to set default user groups for new users

socialdefect · 12-07-2010, 11:22 AM

I am building a livecd, the live user created at boot time is a member of the audio group set in /etc/group. This way works for the livecd but when installed a user must manually add himself to the audio group. How can I set new users to automatically become a member of the audio group?
In /etc/default/useradd I can set only one group.

stress_junkie · 12-07-2010, 01:38 PM

It really depends on how you are creating the user account on the installed system. If you are using useradd then you must be using a script. If you are using a script then you can designate the ancillary user groups on the command line.

Code:

useradd -G "audio,lpadmin,cdrom,whatever" useraccountname

Notice the uppercase G to designate ancillary user groups.

socialdefect · 12-07-2010, 02:08 PM

I know I can use useradd or gpasswd afther an account is created but I'd like to set somewhere that no mather if useradd/adduser is used or the gui every new user automatically becomes a member of the group equal to the user's name and the audio group by default.

stress_junkie · 12-07-2010, 02:38 PM

I misread your original post. I thought that we were talking about the user account created by the installation procedure. Now I see that this is the only case where it already works. Sorry about that.

My Ubuntu 10.04 system has a file /etc/adduser.conf. It has that kind of information in there.

socialdefect · 12-07-2010, 02:53 PM

Thanx a lot for I never tried to change the config of useradd

I've just set the EXTRA_GROUPS variable in /etc/adduser.conf and now it works