[ALUG] login incorrect error for passwordless account

[sagr]

Hi Folks,

I have just installed openSUSE 10.2 on a spare PC.

The PC boots up to the Linux ascii login prompt ok:

   Welcome to openSUSE 10.2 (i586) - Kernel 2.6.18.2-34-default (tty1)
   Linux login:

However if I enter the login name "root" the PC immediately comes back and
says:

   login incorrect.

i.e. it recognises that root does not require a password but will not let me
login.

I have booted the PC using the install CD and can see the files on the hard
disk.  If I look at /etc/shadow I can see that the root entry does not
require a password.

I have therefore used vi to create an passwordless entry for a test user
"tux" in /etc/password and /etc/shadow and also create a /home/tux directory
and assigned it to user tux, group users however, after rebooting I still
get the "login incorrect" error when I try to login as either tux or root.

What has gone wrong?  Any suggestions on how to login would be welcome.

Sagr