====== Ubuntu - Samba - Test nmbd ======

Check that nmbd is running:

<code bash>
ps -eaf | grep nmbd
</code>

result:

<code bash>
root       3422      1  0 10:30 ?        00:00:00 /usr/sbin/nmbd -D
root       5178   4327  0 11:14 pts/0    00:00:00 grep --color=auto nmbd
</code>

<WRAP info>
**NOTE:**  If **nmbd** does not appear in the list reported by ps, it should be started as root using the normal means:

<code bash>
/usr/local/samba/bin/nmbd -D
</code>

</WRAP>

----

===== Use the __SAMBA__ NetBIOS Name =====

Samba servers have a special NetBIOS name, **<nowiki>__SAMBA__</nowiki>**, to which they will always respond.

  * By querying the server for this name, we can verify that nmbd is working correctly.
  * The **-U** flag is used to specify the address to which the query should be sent.

<code bash>
nmblookup -U 127.0.0.1 __SAMBA__
</code>

result:

<code bash>
querying __SAMBA__ on 127.0.0.1
192.168.0.2 __SAMBA__<00>
192.168.1.2 __SAMBA__<00>
</code>

<WRAP info>
**NOTE:**  If **nmbd** is not running, the following error message will be shown:

<code bash>
name_query failed to find name __SAMBA__
</code>

  * This can also be caused by not including the loopback interface name for the interfaces parameter in smb.conf and setting **bind interfaces only = yes**.

</WRAP>

----

===== Check if nmbd was able to successfully register the domain name =====

<code bash>
nmblookup -U 127.0.0.1 ShareWiz
</code>

result:

<code bash>
querying ShareWiz on 127.0.0.1
192.168.0.2 ShareWiz<00>
192.168.1.2 ShareWiz<00>
</code>

<WRAP info>
**NOTE:**  If an domain was not found by nmbd the result would be:

<code bash>
querying xyz on 127.0.0.1
name_query failed to find name xyz
</code>

A possible reason for a failure is that the server was unable to register its NetBIOS name.

</WRAP>

----

===== Use the Broadcast Address =====

If the NetBIOS name is unregistered, you can locate the host that currently owns the name by sending a name query request to the broadcast address of the local subnet.

<code bash>
nmblookup -B 192.168.1.255 ShareWiz
</code>

result:

<code bash>
querying ShareWiz on 192.168.1.255
192.168.1.3 ShareWiz<00>
</code>

<WRAP info>
**NOTE:**  In this example, the name ShareWiz has been registered by a host at address 192.168.1.3 and not our Samba server.

  * To correct this problem is to rename the rogue machine.

If it failed the result would be:

<code bash>
querying ShareWiz on 192.168.1.255
name_query failed to find name ShareWiz
</code>

</WRAP>