NAME
nmbd - NetBIOS name server to provide NetBIOS over IP naming services to clientsSYNOPSIS
nmbd
[-D|--daemon] [-i|--interactive] [-F|--foreground] [--no-process-group]
[-b|--build-options] [-p <port number(s)>]
[-P <profiling level>]
[-d <debug level>] [--debug-stdout]
[--configfile=<configuration file>]
[--option=<name>=<value>]
[-l|--log-basename <log directory>] [--leak-report]
[--leak-report-full] [-V|--version]
DESCRIPTION
This program is part of the samba(7) suite. nmbd is a server that understands and can reply to NetBIOS over IP name service requests, like those produced by SMB/CIFS clients such as Windows 95/98/ME, Windows NT, Windows 2000, Windows XP and LanManager clients. It also participates in the browsing protocols which make up the Windows "Network Neighborhood" view. SMB/CIFS clients, when they start up, may wish to locate an SMB/CIFS server. That is, they wish to know what IP number a specified host is using. Amongst other services, nmbd will listen for such requests, and if its own NetBIOS name is specified it will respond with the IP number of the host it is running on. Its "own NetBIOS name" is by default the primary DNS name of the host it is running on, but this can be overridden by the netbios name in /etc/samba/smb.conf. Thus nmbd will reply to broadcast queries for its own name(s). Additional names for nmbd to respond on can be set via parameters in the smb.conf(5) configuration file. nmbd can also be used as a WINS (Windows Internet Name Server) server. What this basically means is that it will act as a WINS database server, creating a database from name registration requests that it receives and replying to queries from clients for these names. In addition, nmbd can act as a WINS proxy, relaying broadcast queries from clients that do not understand how to talk the WINS protocol to a WINS server.OPTIONS
-D|--daemonIf specified, this parameter causes nmbd to
operate as a daemon. That is, it detaches itself and runs in the background,
fielding requests on the appropriate port. By default, nmbd will operate as a
daemon if launched from a command shell. nmbd can also be operated from the
inetd meta-daemon, although this is not recommended.
-F|--foreground
If specified, this parameter causes the main
nmbd process to not daemonize, i.e. double-fork and disassociate with the
terminal. Child processes are still created as normal to service each
connection request, but the main process does not exit. This operation mode is
suitable for running nmbd under process supervisors such as supervise and
svscan from Daniel J. Bernstein's daemontools package, or the AIX process
monitor.
-i|--interactive
If this parameter is specified it causes the
server to run "interactively", not as a daemon, even if the server
is executed on the command line of a shell. Setting this parameter negates the
implicit daemon mode when run from the command line. nmbd also logs to
standard output, as if the -S parameter had been given.
-H|--hosts <filename>
NetBIOS lmhosts file. The lmhosts file is a
list of NetBIOS names to IP addresses that is loaded by the nmbd server and
used via the name resolution mechanism name resolve order described in
smb.conf(5) to resolve any NetBIOS name queries needed by the server.
Note that the contents of this file are NOT used by nmbd to answer any
name queries. Adding a line to this file affects name NetBIOS resolution from
this host ONLY.
The default path to this file is compiled into Samba as part of the build
process. Common defaults are /usr/local/samba/lib/lmhosts,
/usr/samba/lib/lmhosts or /etc/samba/lmhosts. See the lmhosts(5) man
page for details on the contents of this file.
-p|--port <UDP port number>
UDP port number is a positive integer value.
This option changes the default UDP port number (normally 137) that nmbd
responds to name queries on. Don't use this option unless you are an expert,
in which case you won't need help!
--no-process-group
Do not create a new process group for
nmbd.
-d|--debuglevel=DEBUGLEVEL, --debug-stdout
level is an integer from 0 to 10. The
default value if this parameter is not specified is 0.
The higher this value, the more detail will be logged to the log files about the
activities of the server. At level 0, only critical errors and serious
warnings will be logged. Level 1 is a reasonable level for day-to-day running
- it generates a small amount of information about operations carried out.
Levels above 1 will generate considerable amounts of log data, and should only
be used when investigating a problem. Levels above 3 are designed for use only
by developers and generate HUGE amounts of log data, most of which is
extremely cryptic.
Note that specifying this parameter here will override the log level
parameter in the /etc/samba/smb.conf file. This will redirect debug output to
STDOUT. By default server daemons are logging to a log file.
--configfile=CONFIGFILE
The file specified contains the configuration
details required by the server. The information in this file includes
server-specific information such as what printcap file to use, as well as
descriptions of all the services that the server is to provide. See
/etc/samba/smb.conf for more information. The default configuration file name
is determined at compile time.
--option=<name>=<value>
Set the smb.conf(5) option
"<name>" to value "<value>" from the command
line. This overrides compiled-in defaults and options read from the
configuration file. If a name or a value includes a space, wrap whole
--option=name=value into quotes.
-l|--log-basename=logdirectory
Base directory name for log/debug files. The
extension ".progname" will be appended (e.g. log.smbclient,
log.smbd, etc...). The log file is never removed by the client.
--leak-report
Enable talloc leak reporting on exit.
--leak-report-full
Enable full talloc leak reporting on
exit.
-V|--version
Prints the program version number.
-?|--help
Print a summary of command line options.
--usage
Display brief usage message.
FILES
/etc/inetd.confIf the server is to be run by the inetd
meta-daemon, this file must contain suitable startup information for the
meta-daemon.
/etc/rc
or whatever initialization script your system
uses).
If running the server as a daemon at startup, this file will need to contain an
appropriate startup sequence for the server.
/etc/services
If running the server via the meta-daemon
inetd, this file must contain a mapping of service name (e.g., netbios-ssn) to
service port (e.g., 139) and protocol type (e.g., tcp).
/usr/local/samba/lib/smb.conf
This is the default location of the
smb.conf(5) server configuration file. Other common places that systems
install this file are /usr/samba/lib/smb.conf and /etc/samba/smb.conf.
When run as a WINS server (see the wins support parameter in the
smb.conf(5) man page), nmbd will store the WINS database in the file
wins.dat in the var/locks directory configured under wherever Samba was
configured to install itself.
If nmbd is acting as a browse master (see the local master
parameter in the smb.conf(5) man page, nmbd will store the browsing
database in the file browse.dat in the var/locks directory configured under
wherever Samba was configured to install itself.
SIGNALS
To shut down an nmbd process it is recommended that SIGKILL (-9) NOT be used, except as a last resort, as this may leave the name database in an inconsistent state. The correct way to terminate nmbd is to send it a SIGTERM (-15) signal and wait for it to die on its own. nmbd will accept SIGHUP, which will cause it to dump out its namelists into the file namelist.debug in the /usr/local/samba/var/locks directory (or the var/locks directory configured under wherever Samba was configured to install itself). This will also cause nmbd to dump out its server database in the log.nmb file. Additionally, the signal will cause reloading nmbd configuration. Instead of sending a SIGHUP signal, a request to dump namelists into the file and reload a configuration file may be sent using smbcontrol(1) program. The debug log level of nmbd may be raised or lowered using smbcontrol(1) (SIGUSR[1|2] signals are no longer used since Samba 2.2). This is to allow transient problems to be diagnosed, whilst still running at a normally low log level.VERSION
This man page is part of version 4.17.12-Debian of the Samba suite.SEE ALSO
inetd(8), smbd(8), smb.conf(5), smbclient(1), testparm(1), and the Internet RFC's rfc1001.txt, rfc1002.txt. In addition the CIFS (formerly SMB) specification is available as a link from the Web page https://www.samba.org/cifs/.AUTHOR
The original Samba software and related utilities were created by Andrew Tridgell. Samba is now developed by the Samba Team as an Open Source project similar to the way the Linux kernel is developed.10/10/2023 | Samba 4.17.12-Debian |