Как ввести Ubuntu в домен Windows?

/etc/krb5.conf :

[libdefaults]
default_realm = MYDOMAIN.RU
default_tgs_enctypes = aes256-cts aes128-cts arcfour-hmac-md5 des-cbc-md5 des-cbc-crc
default_tkt_enctypes = aes256-cts aes128-cts arcfour-hmac-md5 des-cbc-md5 des-cbc-crc
permitted_enctypes = aes256-cts aes128-cts arcfour-hmac-md5 des-cbc-md5 des-cbc-crc
dns_lookup_realm = true
dns_lookup_kdc = true
passwd_check_s_address = false
udp_preference_limit = 1
ccache_type = 3
kdc_timesync = 0
[domain_realm]
.MYDOMAIN.RU = MYDOMAIN.RU
MYDOMAIN.RU = MYDOMAIN.RU
delta.MYDOMAIN.RU = MYDOMAIN.RU
main.MYDOMAIN.RU = MYDOMAIN.RU
savinmsk.MYDOMAIN.RU = MYDOMAIN.RU
upsilon.MYDOMAIN.RU = MYDOMAIN.RU
[realms]
MYDOMAIN.RU = {
kdc = upsilon.MYDOMAIN.RU:88
master_kdc = upsilon.MYDOMAIN.RU:88
kpasswd = upsilon.MYDOMAIN.RU:464
kpasswd_server = upsilon.MYDOMAIN.RU:464
kdc = main.MYDOMAIN.RU:88
master_kdc = main.MYDOMAIN.RU:88
kpasswd = main.MYDOMAIN.RU:464
kpasswd_server = main.MYDOMAIN.RU:464
kdc = delta.MYDOMAIN.RU:88
master_kdc = delta.MYDOMAIN.RU:88
kpasswd = delta.MYDOMAIN.RU:464
kpasswd_server = delta.MYDOMAIN.RU:464
}

testparm:
Load smb config files from /etc/samba/smb.conf
rlimit_max: increasing rlimit_max (1024) to minimum Windows limit (16384)
Processing section "[printers]"
Processing section "[print$]"
Loaded services file OK.
WARNING: The setting 'security=ads' should NOT be combined with the 'password server' parameter.
(by default Samba will discover the correct DC to contact automatically).
Server role: ROLE_DOMAIN_MEMBER
Press enter to see a dump of your service definitions

net ads testjoin:
Failed to open /var/lib/samba/private/secrets.tdb
Join to domain is not valid: Access denied

@merryjane строка ввода логина не появляется при включении... на экране авторизации. кроме локального и гостевого пользователей.

не помогает...