1 <html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>nmbd</title><link rel="stylesheet" href="samba.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.68.1"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="refentry" lang="en"><a name="nmbd.8"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>nmbd — NetBIOS name server to provide NetBIOS
2 over IP naming services to clients</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="cmdsynopsis"><p><code class="command">nmbd</code> [-D] [-F] [-S] [-a] [-i] [-o] [-h] [-V] [-d <debug level>] [-H <lmhosts file>] [-l <log directory>] [-p <port number>] [-s <configuration file>]</p></div></div><div class="refsect1" lang="en"><a name="id2450643"></a><h2>DESCRIPTION</h2><p>This program is part of the <a href="samba.7.html"><span class="citerefentry"><span class="refentrytitle">samba</span>(7)</span></a> suite.</p><p><span><strong class="command">nmbd</strong></span> is a server that understands
3 and can reply to NetBIOS over IP name service requests, like
4 those produced by SMB/CIFS clients such as Windows 95/98/ME,
5 Windows NT, Windows 2000, Windows XP and LanManager clients. It also
6 participates in the browsing protocols which make up the
7 Windows "Network Neighborhood" view.</p><p>SMB/CIFS clients, when they start up, may wish to
8 locate an SMB/CIFS server. That is, they wish to know what
9 IP number a specified host is using.</p><p>Amongst other services, <span><strong class="command">nmbd</strong></span> will
10 listen for such requests, and if its own NetBIOS name is
11 specified it will respond with the IP number of the host it
12 is running on. Its "own NetBIOS name" is by
13 default the primary DNS name of the host it is running on,
14 but this can be overridden by the <a class="indexterm" name="id2450692"></a>netbios name
15 in <code class="filename">smb.conf</code>. Thus <span><strong class="command">nmbd</strong></span> will
16 reply to broadcast queries for its own name(s). Additional
17 names for <span><strong class="command">nmbd</strong></span> to respond on can be set
18 via parameters in the <a href="smb.conf.5.html"><span class="citerefentry"><span class="refentrytitle">smb.conf</span>(5)</span></a> configuration file.</p><p><span><strong class="command">nmbd</strong></span> can also be used as a WINS
19 (Windows Internet Name Server) server. What this basically means
20 is that it will act as a WINS database server, creating a
21 database from name registration requests that it receives and
22 replying to queries from clients for these names.</p><p>In addition, <span><strong class="command">nmbd</strong></span> can act as a WINS
23 proxy, relaying broadcast queries from clients that do
24 not understand how to talk the WINS protocol to a WINS
25 server.</p></div><div class="refsect1" lang="en"><a name="id2450754"></a><h2>OPTIONS</h2><div class="variablelist"><dl><dt><span class="term">-D</span></dt><dd><p>If specified, this parameter causes
26 <span><strong class="command">nmbd</strong></span> to operate as a daemon. That is,
27 it detaches itself and runs in the background, fielding
28 requests on the appropriate port. By default, <span><strong class="command">nmbd</strong></span>
29 will operate as a daemon if launched from a command shell.
30 nmbd can also be operated from the <span><strong class="command">inetd</strong></span>
31 meta-daemon, although this is not recommended.
32 </p></dd><dt><span class="term">-F</span></dt><dd><p>If specified, this parameter causes
33 the main <span><strong class="command">nmbd</strong></span> process to not daemonize,
34 i.e. double-fork and disassociate with the terminal.
35 Child processes are still created as normal to service
36 each connection request, but the main process does not
37 exit. This operation mode is suitable for running
38 <span><strong class="command">nmbd</strong></span> under process supervisors such
39 as <span><strong class="command">supervise</strong></span> and <span><strong class="command">svscan</strong></span>
40 from Daniel J. Bernstein's <span><strong class="command">daemontools</strong></span>
41 package, or the AIX process monitor.
42 </p></dd><dt><span class="term">-S</span></dt><dd><p>If specified, this parameter causes
43 <span><strong class="command">nmbd</strong></span> to log to standard output rather
44 than a file.</p></dd><dt><span class="term">-i</span></dt><dd><p>If this parameter is specified it causes the
45 server to run "interactively", not as a daemon, even if the
46 server is executed on the command line of a shell. Setting this
47 parameter negates the implicit daemon mode when run from the
48 command line. <span><strong class="command">nmbd</strong></span> also logs to standard
49 output, as if the <code class="constant">-S</code> parameter had been
50 given. </p></dd><dt><span class="term">-h|--help</span></dt><dd><p>Print a summary of command line options.
51 </p></dd><dt><span class="term">-H <filename></span></dt><dd><p>NetBIOS lmhosts file. The lmhosts
52 file is a list of NetBIOS names to IP addresses that
53 is loaded by the nmbd server and used via the name
54 resolution mechanism <a class="indexterm" name="id2450977"></a>name resolve order described in <a href="smb.conf.5.html"><span class="citerefentry"><span class="refentrytitle">smb.conf</span>(5)</span></a> to resolve any
55 NetBIOS name queries needed by the server. Note
56 that the contents of this file are <span class="emphasis"><em>NOT</em></span>
57 used by <span><strong class="command">nmbd</strong></span> to answer any name queries.
58 Adding a line to this file affects name NetBIOS resolution
59 from this host <span class="emphasis"><em>ONLY</em></span>.</p><p>The default path to this file is compiled into
60 Samba as part of the build process. Common defaults
61 are <code class="filename">/usr/local/samba/lib/lmhosts</code>,
62 <code class="filename">/usr/samba/lib/lmhosts</code> or
63 <code class="filename">/etc/samba/lmhosts</code>. See the <a href="lmhosts.5.html"><span class="citerefentry"><span class="refentrytitle">lmhosts</span>(5)</span></a> man page for details on the contents of this file.</p></dd><dt><span class="term">-V</span></dt><dd><p>Prints the program version number.
64 </p></dd><dt><span class="term">-s <configuration file></span></dt><dd><p>The file specified contains the
65 configuration details required by the server. The
66 information in this file includes server-specific
67 information such as what printcap file to use, as well
68 as descriptions of all the services that the server is
69 to provide. See <code class="filename">smb.conf</code> for more information.
70 The default configuration file name is determined at
71 compile time.</p></dd><dt><span class="term">-d|--debuglevel=level</span></dt><dd><p><em class="replaceable"><code>level</code></em> is an integer
72 from 0 to 10. The default value if this parameter is
73 not specified is zero.</p><p>The higher this value, the more detail will be
74 logged to the log files about the activities of the
75 server. At level 0, only critical errors and serious
76 warnings will be logged. Level 1 is a reasonable level for
77 day-to-day running - it generates a small amount of
78 information about operations carried out.</p><p>Levels above 1 will generate considerable
79 amounts of log data, and should only be used when
80 investigating a problem. Levels above 3 are designed for
81 use only by developers and generate HUGE amounts of log
82 data, most of which is extremely cryptic.</p><p>Note that specifying this parameter here will
83 override the <a class="indexterm" name="id2451111"></a> parameter
84 in the <code class="filename">smb.conf</code> file.</p></dd><dt><span class="term">-l|--logfile=logdirectory</span></dt><dd><p>Base directory name for log/debug files. The extension
85 <code class="constant">".progname"</code> will be appended (e.g. log.smbclient,
86 log.smbd, etc...). The log file is never removed by the client.
87 </p></dd><dt><span class="term">-p <UDP port number></span></dt><dd><p>UDP port number is a positive integer value.
88 This option changes the default UDP port number (normally 137)
89 that <span><strong class="command">nmbd</strong></span> responds to name queries on. Don't
90 use this option unless you are an expert, in which case you
91 won't need help!</p></dd></dl></div></div><div class="refsect1" lang="en"><a name="id2451383"></a><h2>FILES</h2><div class="variablelist"><dl><dt><span class="term"><code class="filename">/etc/inetd.conf</code></span></dt><dd><p>If the server is to be run by the
92 <span><strong class="command">inetd</strong></span> meta-daemon, this file
93 must contain suitable startup information for the
95 </p></dd><dt><span class="term"><code class="filename">/etc/rc</code></span></dt><dd><p>or whatever initialization script your
96 system uses).</p><p>If running the server as a daemon at startup,
97 this file will need to contain an appropriate startup
98 sequence for the server.</p></dd><dt><span class="term"><code class="filename">/etc/services</code></span></dt><dd><p>If running the server via the
99 meta-daemon <span><strong class="command">inetd</strong></span>, this file
100 must contain a mapping of service name (e.g., netbios-ssn)
101 to service port (e.g., 139) and protocol type (e.g., tcp).
102 </p></dd><dt><span class="term"><code class="filename">/usr/local/samba/lib/smb.conf</code></span></dt><dd><p>This is the default location of
103 the <a href="smb.conf.5.html"><span class="citerefentry"><span class="refentrytitle">smb.conf</span>(5)</span></a> server
104 configuration file. Other common places that systems
105 install this file are <code class="filename">/usr/samba/lib/smb.conf</code>
106 and <code class="filename">/etc/samba/smb.conf</code>.</p><p>When run as a WINS server (see the
107 <a class="indexterm" name="id2451495"></a>wins support
108 parameter in the <a href="smb.conf.5.html"><span class="citerefentry"><span class="refentrytitle">smb.conf</span>(5)</span></a> man page),
109 <span><strong class="command">nmbd</strong></span>
110 will store the WINS database in the file <code class="filename">wins.dat</code>
111 in the <code class="filename">var/locks</code> directory configured under
112 wherever Samba was configured to install itself.</p><p>If <span><strong class="command">nmbd</strong></span> is acting as a <span class="emphasis"><em>
113 browse master</em></span> (see the <a class="indexterm" name="id2451544"></a>local master
114 parameter in the <a href="smb.conf.5.html"><span class="citerefentry"><span class="refentrytitle">smb.conf</span>(5)</span></a> man page, <span><strong class="command">nmbd</strong></span>
115 will store the browsing database in the file <code class="filename">browse.dat
116 </code> in the <code class="filename">var/locks</code> directory
117 configured under wherever Samba was configured to install itself.
118 </p></dd></dl></div></div><div class="refsect1" lang="en"><a name="id2451584"></a><h2>SIGNALS</h2><p>To shut down an <span><strong class="command">nmbd</strong></span> process it is recommended
119 that SIGKILL (-9) <span class="emphasis"><em>NOT</em></span> be used, except as a last
120 resort, as this may leave the name database in an inconsistent state.
121 The correct way to terminate <span><strong class="command">nmbd</strong></span> is to send it
122 a SIGTERM (-15) signal and wait for it to die on its own.</p><p><span><strong class="command">nmbd</strong></span> will accept SIGHUP, which will cause
123 it to dump out its namelists into the file <code class="filename">namelist.debug
124 </code> in the <code class="filename">/usr/local/samba/var/locks</code>
125 directory (or the <code class="filename">var/locks</code> directory configured
126 under wherever Samba was configured to install itself). This will also
127 cause <span><strong class="command">nmbd</strong></span> to dump out its server database in
128 the <code class="filename">log.nmb</code> file.</p><p>The debug log level of nmbd may be raised or lowered
129 using <a href="smbcontrol.1.html"><span class="citerefentry"><span class="refentrytitle">smbcontrol</span>(1)</span></a> (SIGUSR[1|2] signals
130 are no longer used since Samba 2.2). This is to allow
131 transient problems to be diagnosed, whilst still running
132 at a normally low log level.</p></div><div class="refsect1" lang="en"><a name="id2451671"></a><h2>VERSION</h2><p>This man page is correct for version 3.0 of
133 the Samba suite.</p></div><div class="refsect1" lang="en"><a name="id2451682"></a><h2>SEE ALSO</h2><p>
134 <a href="inetd.8.html"><span class="citerefentry"><span class="refentrytitle">inetd</span>(8)</span></a>, <a href="smbd.8.html"><span class="citerefentry"><span class="refentrytitle">smbd</span>(8)</span></a>, <a href="smb.conf.5.html"><span class="citerefentry"><span class="refentrytitle">smb.conf</span>(5)</span></a>, <a href="smbclient.1.html"><span class="citerefentry"><span class="refentrytitle">smbclient</span>(1)</span></a>, <a href="testparm.1.html"><span class="citerefentry"><span class="refentrytitle">testparm</span>(1)</span></a>, <a href="testprns.1.html"><span class="citerefentry"><span class="refentrytitle">testprns</span>(1)</span></a>, and the Internet
135 RFC's <code class="filename">rfc1001.txt</code>, <code class="filename">rfc1002.txt</code>.
136 In addition the CIFS (formerly SMB) specification is available
137 as a link from the Web page <a href="http://samba.org/cifs/" target="_top">
138 http://samba.org/cifs/</a>.</p></div><div class="refsect1" lang="en"><a name="id2451761"></a><h2>AUTHOR</h2><p>The original Samba software and related utilities
139 were created by Andrew Tridgell. Samba is now developed
140 by the Samba Team as an Open Source project similar
141 to the way the Linux kernel is developed.</p><p>The original Samba man pages were written by Karl Auer.
142 The man page sources were converted to YODL format (another
143 excellent piece of Open Source software, available at <a href="ftp://ftp.icce.rug.nl/pub/unix/" target="_top">
144 ftp://ftp.icce.rug.nl/pub/unix/</a>) and updated for the Samba 2.0
145 release by Jeremy Allison. The conversion to DocBook for
146 Samba 2.2 was done by Gerald Carter. The conversion to DocBook
147 XML 4.2 for Samba 3.0 was done by Alexander Bokovoy.</p></div></div></body></html>
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