This file is indexed.

/usr/share/doc/sysadmin-guide/html/etc-fs.html is in sysadmin-guide 0.9-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML
><HEAD
><TITLE
>The /etc directory</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK
REL="HOME"
TITLE="Linux System Administrators Guide"
HREF="index.html"><LINK
REL="UP"
TITLE="Overview of the Directory Tree"
HREF="dir-tree-overview.html"><LINK
REL="PREVIOUS"
TITLE="The root filesystem"
HREF="root-fs.html"><LINK
REL="NEXT"
TITLE="The /dev directory"
HREF="dev-fs.html"></HEAD
><BODY
CLASS="SECT1"
BGCOLOR="#FFFFFF"
TEXT="#000000"
LINK="#0000FF"
VLINK="#840084"
ALINK="#0000FF"
><DIV
CLASS="NAVHEADER"
><TABLE
SUMMARY="Header navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="3"
ALIGN="center"
>Linux System Administrators Guide: </TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="bottom"
><A
HREF="root-fs.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="80%"
ALIGN="center"
VALIGN="bottom"
>Chapter 3. Overview of the Directory Tree</TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="bottom"
><A
HREF="dev-fs.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><DIV
CLASS="SECT1"
><H1
CLASS="SECT1"
><A
NAME="ETC-FS"
></A
>3.3. The <TT
CLASS="FILENAME"
>/etc</TT
> directory</H1
><P
>The <TT
CLASS="FILENAME"
>/etc</TT
> maintains a lot
	of files.  Some of them are described below.  For others, you
	should determine which program they belong to and read the manual
	page for that program.	Many networking configuration files are
	in <TT
CLASS="FILENAME"
>/etc</TT
> as well, and are described in the
	<I
CLASS="CITETITLE"
>Networking Administrators' Guide</I
>.

	<DIV
CLASS="GLOSSLIST"
><DL
><DT
><B
><TT
CLASS="FILENAME"
>/etc/rc</TT
> or 
	<TT
CLASS="FILENAME"
>/etc/rc.d</TT
> or 
	<TT
CLASS="FILENAME"
>/etc/rc?.d</TT
></B
></DT
><DD
><P
>Scripts or directories of scripts
		to run at startup or when changing the run level.
		See <A
HREF="major-services.html#INIT"
>Section 2.3.1</A
> for further
		information.  </P
></DD
><DT
><B
><TT
CLASS="FILENAME"
>/etc/passwd</TT
></B
></DT
><DD
><P
>The user database, with fields giving the
		username, real name, home directory, and other information
		about each user. The format is documented in the 
		<B
CLASS="COMMAND"
>passwd</B
> manual page.  
		</P
></DD
><DT
><B
><TT
CLASS="FILENAME"
>/etc/shadow</TT
></B
></DT
><DD
><P
><TT
CLASS="FILENAME"
>/etc/shadow</TT
> is an
		encrypted file the holds user passwords.</P
></DD
><DT
><B
><TT
CLASS="FILENAME"
>/etc/fdprm</TT
></B
></DT
><DD
><P
>Floppy disk parameter table.
		Describes what different floppy disk formats look
		like.  Used by <B
CLASS="COMMAND"
>setfdprm</B
>
		.  See the
		<B
CLASS="COMMAND"
>setfdprm</B
> manual page for more
		information.  </P
></DD
><DT
><B
><TT
CLASS="FILENAME"
>/etc/fstab</TT
></B
></DT
><DD
><P
>Lists the filesystems mounted automatically
		at startup by the <B
CLASS="COMMAND"
>mount -a</B
> command (in
		<TT
CLASS="FILENAME"
>/etc/rc</TT
> or equivalent startup file).
		Under Linux, also contains information about swap areas used
		automatically by <B
CLASS="COMMAND"
>swapon -a</B
>
		.  See <A
HREF="filesystems.html#MOUNT-AND-UMOUNT"
>Section 5.10.7</A
> and the <B
CLASS="COMMAND"
>mount</B
>
		
		manual page for more information.  Also
		<TT
CLASS="FILENAME"
>fstab</TT
> usually has its own manual page in
		section 5. </P
></DD
><DT
><B
><TT
CLASS="FILENAME"
>/etc/group</TT
></B
></DT
><DD
><P
>Similar to <TT
CLASS="FILENAME"
>/etc/passwd</TT
>,
		but describes groups instead of users.  See the
		<TT
CLASS="FILENAME"
>group</TT
> manual page in section 5 for more
		information. </P
></DD
><DT
><B
><TT
CLASS="FILENAME"
>/etc/inittab</TT
></B
></DT
><DD
><P
>Configuration file for
		<B
CLASS="COMMAND"
>init</B
>.  </P
></DD
><DT
><B
><TT
CLASS="FILENAME"
>/etc/issue</TT
></B
></DT
><DD
><P
>Output by <B
CLASS="COMMAND"
>getty</B
>
		 before
		the login prompt.  Usually contains a short description or
		welcoming message to the system.  The contents are up to
		the system administrator.  </P
></DD
><DT
><B
><TT
CLASS="FILENAME"
>/etc/magic</TT
></B
></DT
><DD
><P
>The configuration file
		for <B
CLASS="COMMAND"
>file</B
>.  Contains the
		descriptions of various file formats based on
		which <B
CLASS="COMMAND"
>file</B
> guesses the type of
		the file.  See the <TT
CLASS="FILENAME"
>magic</TT
> and
		<B
CLASS="COMMAND"
>file</B
> manual pages for more information.
		</P
></DD
><DT
><B
><TT
CLASS="FILENAME"
>/etc/motd</TT
></B
></DT
><DD
><P
>The message of the day, automatically
		output after a successful login.  Contents are up to the
		system administrator.  Often used for getting information
		to every user, such as warnings about planned downtimes.
		</P
></DD
><DT
><B
><TT
CLASS="FILENAME"
>/etc/mtab</TT
></B
></DT
><DD
><P
>List of currently mounted filesystems.
		Initially set up by the bootup scripts, and updated
		automatically by the <B
CLASS="COMMAND"
>mount</B
>
		
		command.  Used when a list of mounted filesystems is
		needed, e.g., by the <B
CLASS="COMMAND"
>df</B
>
		 command.
		</P
></DD
><DT
><B
><TT
CLASS="FILENAME"
>/etc/login.defs</TT
></B
></DT
><DD
><P
>Configuration file for the
		<B
CLASS="COMMAND"
>login</B
> command.  The
		<TT
CLASS="FILENAME"
>login.defs</TT
> file usually has a manual
		page in section 5. </P
></DD
><DT
><B
><TT
CLASS="FILENAME"
>/etc/printcap</TT
></B
></DT
><DD
><P
>Like <TT
CLASS="FILENAME"
>/etc/termcap</TT
>
        	<I
CLASS="GLOSSTERM"
><TT
CLASS="FILENAME"
>/etc/printcap</TT
>
		, but
		intended for printers.  However it uses different syntax.
		The <TT
CLASS="FILENAME"
>printcap</TT
> has a manual page in
		section 5. </I
></P
></DD
><DT
><B
><TT
CLASS="FILENAME"
>/etc/profile</TT
>, 
	<TT
CLASS="FILENAME"
>/etc/bash.rc</TT
>, 
	<TT
CLASS="FILENAME"
>/etc/csh.cshrc</TT
></B
></DT
><DD
><P
>Files executed at login or startup time
		by the Bourne, BASH
		,
		or C 
		shells.  These allow the system
		administrator to set global defaults for all users.  Users
		can also create individual copies of these in their home 
		directory to personalize their environment.
		See the manual pages for the respective shells.
		</P
></DD
><DT
><B
><TT
CLASS="FILENAME"
>/etc/securetty</TT
></B
></DT
><DD
><P
>Identifies secure terminals, i.e., the
		terminals from which root is allowed to log in. Typically
		only the virtual consoles are listed, so that it becomes
		impossible (or at least harder) to gain superuser privileges
		by breaking into a system over a modem or a network.  Do not
		allow root logins over a network.  Prefer to log in as an
		unprivileged user and use <B
CLASS="COMMAND"
>su</B
>
		 or
		<B
CLASS="COMMAND"
>sudo</B
> to gain root
		privileges.</P
></DD
><DT
><B
><TT
CLASS="FILENAME"
>/etc/shells</TT
></B
></DT
><DD
><P
>Lists trusted shells.  The
		<B
CLASS="COMMAND"
>chsh</B
> command allows users to change
		their login shell only to shells listed in this file.
		<B
CLASS="COMMAND"
>ftpd</B
>, is the server process that provides
		FTP services for a machine, will check that the user's
		shell is listed in <TT
CLASS="FILENAME"
>/etc/shells</TT
>
		and will not let people log in unless the shell is
		listed there.  </P
></DD
><DT
><B
><TT
CLASS="FILENAME"
>/etc/termcap</TT
></B
></DT
><DD
><P
>The terminal capability database.
		Describes by what ``escape sequences'' various terminals
		can be controlled.  Programs are written so that instead
		of directly outputting an escape sequence that only
		works on a particular brand of terminal, they look up
		the correct sequence to do whatever it is they want to
		do in <TT
CLASS="FILENAME"
>/etc/termcap</TT
>.  As a result
		most programs work with most kinds of terminals.
		See the <TT
CLASS="FILENAME"
>termcap</TT
>, curs_termcap,
		and <TT
CLASS="FILENAME"
>terminfo</TT
> manual pages for
		more information.  </P
></DD
></DL
></DIV
>
	</P
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
SUMMARY="Footer navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><A
HREF="root-fs.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="index.html"
ACCESSKEY="H"
>Home</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="dev-fs.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>The root filesystem</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="dir-tree-overview.html"
ACCESSKEY="U"
>Up</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>The <TT
CLASS="FILENAME"
>/dev</TT
> directory</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>