Re: fsgqa group membership?

["Theodore Ts'o" <tytso@mit.edu>]

On Sun, Jan 14, 2024 at 04:42:41PM +0100, Richard Weinberger wrote:
> It turned out that the test failed because the user "fsgqa" did not
> have the "fsgqa" group assigned.  After rectifying this, the test
> passed successfully.
> 
> But it is nowhere stated that this has to be that way.
> 
> README says only:
> 6. (optional) Create fsgqa test users and groups:
> 
>    $ sudo useradd -m fsgqa
>    $ sudo useradd 123456-fsgqa
>    $ sudo useradd fsgqa2
>    $ sudo groupadd fsgqa

The useradd program creates the /etc/passwd entry as well as the
/etc/group entry.  Demonstration:

% kvm-xfstests shell
    ...
root@kvm-xfstests:~# grep foobarbaz /etc/passwd
root@kvm-xfstests:~# grep foobarbaz /etc/group
root@kvm-xfstests:~# useradd foobarbaz
root@kvm-xfstests:~# grep foobarbaz /etc/passwd
foobarbaz:x:31418:31418::/home/foobarbaz:/bin/sh
root@kvm-xfstests:~# grep foobarbaz /etc/group
foobarbaz:x:31418:

I don't know why that "sudo groupadd fsgqa" is in the README; it's not
necessary, and it would cause a "group already exists" error message.
For example:

root@kvm-xfstests:~# groupadd foobarbaz
groupadd: group 'foobarbaz' already exists

I did this demonstration using on a Debian-based test appliance.  But
it looks like Fedora's "useradd" works exactly the same way.  See the
web page here:

https://docs.fedoraproject.org/en-US/fedora/latest/system-administrators-guide/basic-system-configuration/Managing_Users_and_Groups/

						- Ted