[root@localhost ~]# smbldap-populate
Populating LDAP directory for domain tuancom (S-1-5-21-4048504901-96584880-2496603052)
(using builtin directory structure)

entry dc=tuan,dc=com already exist. 
entry ou=People,dc=tuan,dc=com already exist. 
entry ou=Group,dc=tuan,dc=com already exist. 
adding new entry: ou=Computers,dc=tuan,dc=com
failed to add entry: modifications require authentication at /usr/sbin/smbldap-populate line 500, <GEN1> line 5.
....................................
Please provide a password for the domain root: 
/usr/sbin/smbldap-passwd: user root doesn't exist