что-то с pam-аутентификацией [pam_wheel.so]

evadim vadim # cat /etc/pam.d/su
#%PAM-1.0

auth       sufficient   pam_rootok.so

# If you want to restrict users begin allowed to su even more,
# create /etc/security/suauth.allow (or to that matter) that is only
# writable by root, and add users that are allowed to su to that
# file, one per line.
#auth       required     pam_listfile.so item=ruser sense=allow onerr=fail file=/etc/security/suauth.allow

# Uncomment this to allow users in the wheel group to su without
# entering a passwd.
#auth       sufficient   pam_wheel.so use_uid trust

# Alternatively to above, you can implement a list of users that do
# not need to supply a passwd with a list.
#auth       sufficient   pam_listfile.so item=ruser sense=allow onerr=fail file=/etc/security/suauth.nopass

# Comment this to allow any user, even those not in the 'wheel'
# group to su
auth       required     pam_wheel.so use_uid

auth       include              system-auth

account    include              system-auth

password   include              system-auth

session    include              system-auth
session    required     pam_env.so
session    optional             pam_xauth.so

evadim vadim #