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1 perry 1 SMBD
2 !!!SMBD
3 NAME
4 SYNOPSIS
5 DESCRIPTION
6 OPTIONS
7 FILES
8 LIMITATIONS
9 ENVIRONMENT VARIABLES
10 PAM INTERACTION
11 VERSION
12 DIAGNOSTICS
13 SIGNALS
14 SEE ALSO
15 AUTHOR
16 ----
17 !!NAME
18
19
20 smbd - server to provide SMB/CIFS services to clients
21 !!SYNOPSIS
22
23
24 __smbd__ [[ __-D__ ] [[ __-a__ ] [[ __-i__ ] [[
25 __-o__ ] [[ __-P__ ] [[ __-h__ ] [[ __-V__ ] [[
26 __-d __ ] [[ __-l
27 __ ] [[ __-p __ ] [[
28 __-O __ ] [[ __-s
29 __ ]
30 !!DESCRIPTION
31
32
33 This program is part of the Samba suite.
34
35
36 __smbd__ is the server daemon that provides filesharing
37 and printing services to Windows clients. The server
38 provides filespace and printer services to clients using the
39 SMB (or CIFS) protocol. This is compatible with the
40 !LanManager protocol, and can service !LanManager clients.
41 These include MSCLIENT 3.0 for DOS, Windows for Workgroups,
42 Windows 95/98/ME, Windows NT, Windows 2000, OS/2, DAVE for
43 Macintosh, and smbfs for Linux.
44
45
46 An extensive description of the services that the server can
47 provide is given in the man page for the configuration file
48 controlling the attributes of those services (see
49 ''smb.conf(5)'' services, but will concentrate on the
50 administrative aspects of running the server.
51
52
53 Please note that there are significant security implications
54 to running this server, and the ''smb.conf(5)'' manpage
55 should be regarded as mandatory reading before proceeding
56 with installation.
57
58
59 A session is created whenever a client requests one. Each
60 client gets a copy of the server for each session. This copy
61 then services all connections made by the client during that
62 session. When all connections from its client are closed,
63 the copy of the server for that client
64 terminates.
65
66
67 The configuration file, and any files that it includes, are
68 automatically reloaded every minute, if they change. You can
69 force a reload by sending a SIGHUP to the server. Reloading
70 the configuration file will not affect connections to any
71 service that is already established. Either the user will
72 have to disconnect from the service, or __smbd__ killed
73 and restarted.
74 !!OPTIONS
75
76
77 __-D__
78
79
80 If specified, this parameter causes the server to operate as
81 a daemon. That is, it detaches itself and runs in the
82 background, fielding requests on the appropriate port.
83 Operating the server as a daemon is the recommended way of
84 running __smbd__ for servers that provide more than
85 casual use file and print services. This switch is assumed
86 if __smbd__ is executed on the command line of a
87 shell.
88
89
90 __-a__
91
92
93 If this parameter is specified, each new connection will
94 append log messages to the log file. This is the
95 default.
96
97
98 __-i__
99
100
101 If this parameter is specified it causes the server to run
102
103
104 __-o__
105
106
107 If this parameter is specified, the log files will be
108 overwritten when opened. By default, __smbd__ will append
109 entries to the log files.
110
111
112 __-P__
113
114
115 Passive option. Causes __smbd__ not to send any network
116 traffic out. Used for debugging by the developers
117 only.
118
119
120 __-h__
121
122
123 Prints the help information (usage) for
124 __smbd__.
125
126
127 __-v__
128
129
130 Prints the version number for __smbd__.
131
132
133 __-d __
134
135
136 ''debuglevel'' is an integer from 0 to 10. The default
137 value if this parameter is not specified is
138 zero.
139
140
141 The higher this value, the more detail will be logged to the
142 log files about the activities of the server. At level 0,
143 only critical errors and serious warnings will be logged.
144 Level 1 is a reasonable level for day to day running - it
145 generates a small amount of information about operations
146 carried out.
147
148
149 Levels above 1 will generate considerable amounts of log
150 data, and should only be used when investigating a problem.
151 Levels above 3 are designed for use only by developers and
152 generate HUGE amounts of log data, most of which is
153 extremely cryptic.
154
155
156 Note that specifying this parameter here will override the
157 log levelfile.
158
159
160 __-l __
161
162
163 If specified, ''log directory'' specifies a log directory
164 into which the
165 ''smb.conf(5)''file.
166
167
168 The default log directory is specified at compile
169 time.
170
171
172 __-O __
173
174
175 See the socket options parameter in the ''smb.conf(5)''
176 file for details.
177
178
179 __-p __
180
181
182 ''port number'' is a positive integer value. The default
183 value if this parameter is not specified is
184 139.
185
186
187 This number is the port number that will be used when making
188 connections to the server from client software. The standard
189 (well-known) port number for the SMB over TCP is 139, hence
190 the default. If you wish to run the server as an ordinary
191 user rather than as root, most systems will require you to
192 use a port number greater than 1024 - ask your system
193 administrator for help if you are in this
194 situation.
195
196
197 In order for the server to be useful by most clients, should
198 you configure it on a port other than 139, you will require
199 port redirection services on port 139, details of which are
200 outlined in rfc1002.txt section 4.3.5.
201
202
203 This parameter is not normally specified except in the above
204 situation.
205
206
207 __-s __
208
209
210 The file specified contains the configuration details
211 required by the server. The information in this file
212 includes server-specific information such as what printcap
213 file to use, as well as descriptions of all the services
214 that the server is to provide. See ''smb.conf(5)''for
215 more information. The default configuration file name is
216 determined at compile time.
217 !!FILES
218
219
220 ''/etc/inetd.conf''
221
222
223 If the server is to be run by the __inetd__ meta-daemon,
224 this file must contain suitable startup information for the
225 meta-daemon. See the UNIX_INSTALL.html document for
226 details.
227
228
229 ''/etc/rc''
230
231
232 or whatever initialization script your system
233 uses).
234
235
236 If running the server as a daemon at startup, this file will
237 need to contain an appropriate startup sequence for the
238 server. See the UNIX_INSTALL.html document for
239 details.
240
241
242 ''/etc/services''
243
244
245 If running the server via the meta-daemon __inetd__, this
246 file must contain a mapping of service name (e.g.,
247 netbios-ssn) to service port (e.g., 139) and protocol type
248 (e.g., tcp). See the UNIX_INSTALL.html document for
249 details.
250
251
252 ''/usr/local/samba/lib/smb.conf''
253
254
255 This is the default location of the ''smb.conf'' server
256 configuration file. Other common places that systems install
257 this file are ''/usr/samba/lib/smb.conf'' and
258 ''/etc/smb.conf''.
259
260
261 This file describes all the services the server is to make
262 available to clients. See ''smb.conf(5)''for more
263 information.
264 !!LIMITATIONS
265
266
267 On some systems __smbd__ cannot change uid back to root
268 after a setuid() call. Such systems are called trapdoor uid
269 systems. If you have such a system, you will be unable to
270 connect from a client (such as a PC) as two different users
271 at once. Attempts to connect the second user will result in
272 access denied or similar.
273 !!ENVIRONMENT VARIABLES
274
275
276 __PRINTER__
277
278
279 If no printer name is specified to printable services, most
280 systems will use the value of this variable (or lp if this
281 variable is not defined) as the name of the printer to use.
282 This is not specific to the server, however.
283 !!PAM INTERACTION
284
285
286 Samba uses PAM for authentication (when presented with a
287 plaintext password), for account checking (is this account
288 disabled?) and for session management. The degree too which
289 samba supports PAM is restricted by the limitations of the
290 SMB protocol and the obey pam restricions smb.conf
291 paramater. When this is set, the following restrictions
292 apply:
293
294
295 __Account Validation__: All acccesses to a samba server
296 are checked against PAM to see if the account is vaild, not
297 disabled and is permitted to login at this time. This also
298 applies to encrypted logins.
299
300
301 __Session Management__: When not using share level
302 secuirty, users must pass PAM's session checks before access
303 is granted. Note however, that this is bypassed in share
304 level secuirty. Note also that some older pam configuration
305 files may need a line added for session
306 support.
307 !!VERSION
308
309
310 This man page is correct for version 2.2 of the Samba
311 suite.
312 !!DIAGNOSTICS
313
314
315 Most diagnostics issued by the server are logged in a
316 specified log file. The log file name is specified at
317 compile time, but may be overridden on the command
318 line.
319
320
321 The number and nature of diagnostics available depends on
322 the debug level used by the server. If you have problems,
323 set the debug level to 3 and peruse the log
324 files.
325
326
327 Most messages are reasonably self-explanatory.
328 Unfortunately, at the time this man page was created, there
329 are too many diagnostics available in the source code to
330 warrant describing each and every diagnostic. At this stage
331 your best bet is still to grep the source code and inspect
332 the conditions that gave rise to the diagnostics you are
333 seeing.
334 !!SIGNALS
335
336
337 Sending the __smbd__ a SIGHUP will cause it to reload its
338 ''smb.conf'' configuration file within a short period of
339 time.
340
341
342 To shut down a user's __smbd__ process it is recommended
343 that __SIGKILL (-9) NOT__ be used, except as a last
344 resort, as this may leave the shared memory area in an
345 inconsistent state. The safe way to terminate an __smbd__
346 is to send it a SIGTERM (-15) signal and wait for it to die
347 on its own.
348
349
350 The debug log level of __smbd__ may be raised or lowered
351 using __smbcontrol(1)__ program (SIGUSR[[1|2] signals are
352 no longer used in Samba 2.2). This is to allow transient
353 problems to be diagnosed, whilst still running at a normally
354 low log level.
355
356
357 Note that as the signal handlers send a debug write, they
358 are not re-entrant in __smbd__. This you should wait
359 until __smbd__ is in a state of waiting for an incoming
360 SMB before issuing them. It is possible to make the signal
361 handlers safe by un-blocking the signals before the select
362 call and re-blocking them after, however this would affect
363 performance.
364 !!SEE ALSO
365
366
367 hosts_access(5), __inetd(8)__, __nmbd(8)__,
368 ''smb.conf(5)'' , __smbclient(1)__ , and the Internet
369 RFC's ''rfc1001.txt'', ''rfc1002.txt''. In addition
370 the CIFS (formerly SMB) specification is available as a link
371 from the Web page http://samba.org/cifs/
372 ''
373 !!AUTHOR
374
375
376 The original Samba software and related utilities were
377 created by Andrew Tridgell. Samba is now developed by the
378 Samba Team as an Open Source project similar to the way the
379 Linux kernel is developed.
380
381
382 The original Samba man pages were written by Karl Auer. The
383 man page sources were converted to YODL format (another
384 excellent piece of Open Source software, available at
385 ftp://ftp.icce.rug.nl/pub/unix/
386 ----
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