root@net:~# adduser dennis adminadduser: The group `admin' does not exist.root@net:~# adduser dennis rootAdding user `dennis' to group `root' ...Adding user dennis to group rootDone.
root@net:~# adduser dennis admin
ReplyDeleteadduser: The group `admin' does not exist.
root@net:~# adduser dennis root
Adding user `dennis' to group `root' ...
Adding user dennis to group root
Done.