[Samba] Seek clarification on use of 'net rpc join -U' to join a

Dear Friends:

I am trying to join a Suse 9.1 Server running Samba 3.07 to an NT4
Domain. One part I am confused about is the command "net rpc join -U"
.... is the username to be used with this command the name of an
administrator on the NT4 PDC? Does that administrator need to be an
user on the Samba Server and a member of the "root" group?

I successfully join using the DomainAdmin%Password combo from the NT4
domain, but with subsequent commands such as "net rpc trustdom list" it
fails when I enter the password for the DomainAdmin. What password
should I be using?

Also the "wbinfo" commands appear to work but I don't understand the
"wbinfo --set-auth-user" for the same reasons as stated above. Is the
user a NT4 DomainAdmin or is it 'root' on the linux box?

My smb.conf follows. Thank you for your kind help.

Dennis A. Johnson
K.M.B., Inc.
Phoenix, Arizona

# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~
# smb.conf
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~

[global]
workgroup = DOMAIN
server string = Samba Server
netbios name = SRVR3
security = domain
password server = SRVR1 SRVR2
wins server = 192.168.0.70
winbind separator = +
winbind use default domain = yes
idmap uid = 15000-20000
idmap gid = 15000-20000
use sendfile = yes
interfaces = 127.0.0.1 eth0
hosts allow = 192.168.0. 127.
bind interfaces only = true
local master = no
printing = cups
printcap name = cups
printer admin = @ntadmin, root, administrator
disable spoolss = yes
encrypt passwords = yes
passdb backend = smbpasswd

[homes]
comment = Home Directories
valid users = %S
browseable = no
read only = no
guest ok = no
printable = no

[Documents]
comment = Public Documents
path = /export/Documents
read only = yes
writeable = yes
inherit permissions = yes
browseable = yes
guest ok = no

[Pictures]
comment = Public Pictures
path = /export/Pictures
valid users = %S
read only = no
writeable = yes
browseable = yes
inherit permissions = yes
guest ok = no

[printers]
comment = All Printers
path = /var/spool/samba
printer admin = root, itadminkmb, dennis
printable = yes
create mask = 0600
browseable = no
guest ok = no
[print$]
comment = Printer Drivers
path = /var/lib/samba/drivers
write list = @ntadmin root
force group = ntadmin
create mask = 0664
directory mask = 0775
browseable = yes
guest ok = no
printable = no
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~
# .end. smb.conf
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~

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