NO SigleMode! NO root !
1.
> cat /etc/passwd | grep root
root:*:0:0:Charlie &:/root:BLABLA
BLABLA != /bin/csh !!!!
2.
>cd ~
>ln -s /bin/csh BLABLA
>su
Password:...
#chpass -s /bin/csh
3.
> cat /etc/passwd | grep root
root:*:0:0:Charlie &:/root:/bin/csh
WIN!
% cat /etc/shells
# $FreeBSD: releng/9.3/etc/shells 59717 2000-04-27 21:58:46Z ache $
#
# List of acceptable shells for chpass(1).
# Ftpd will not allow users to connect who are not using
# one of these shells.
/bin/sh
/bin/csh
/bin/tcsh
/usr/local/bin/bash
/usr/local/bin/rbash
