Thanks,..I have the solution,...that I must delete /etc/nologin,...but I
don't understand the mechacism.
>A password problem will say "login incorrect". Not getting that,
>are you?
>If it's just the one user, one of ~/.bash_profile, ~/.bash_login,
>or ~/.profile contains a fault. If it's all users, or you have only
>the one, look to /etc/profile. I made a model of the problem by
>making a ~/.bash_profile for one user with "zop" in it - a local
>command to generate an illegal instruction fault. Poor fellow gets
>mail message, then gets thrown back to the login prompt.
>When you su from root, what then will you get from whoami? Bet it's
>root still.
>
>Regards,
>
