source: clfs-sysroot/BOOK/final-system/common/util-linux.xml@ ddf299b

Last change on this file since ddf299b was 3349a3a, checked in by Jim Gifford <clfs@…>, 19 years ago

r3669@server (orig r1667): jciccone | 2006-05-27 18:13:38 -0700
Various text and command fixes

  • Property mode set to 100644
File size: 27.0 KB
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1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
3 "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
4 <!ENTITY % general-entities SYSTEM "../../general.ent">
5 %general-entities;
6]>
7
8<sect1 id="ch-system-util-linux" role="wrap">
9 <?dbhtml filename="util-linux.html"?>
10
11 <title>Util-linux-&util-linux-version;</title>
12
13 <indexterm zone="ch-system-util-linux">
14 <primary sortas="a-Util-linux">Util-linux</primary>
15 </indexterm>
16
17 <sect2 role="package">
18 <title/>
19
20 <para>The Util-linux package contains miscellaneous utility programs.
21 Among them are utilities for handling file systems, consoles, partitions,
22 and messages.</para>
23
24
25 </sect2>
26
27 <sect2 id="fhs-util-linux" role="installation">
28 <title>FHS compliance notes</title>
29
30 <para>The FHS recommends using the <filename
31 class="directory">/var/lib/hwclock</filename> directory instead of the
32 usual <filename class="directory">/etc</filename> directory as the
33 location for the <filename>adjtime</filename> file. To make the
34 <command>hwclock</command> program FHS-compliant, run the following:</para>
35
36<screen><userinput>cp hwclock/hwclock.c{,.orig}
37sed 's@etc/adjtime@var/lib/hwclock/adjtime@g' \
38 hwclock/hwclock.c.orig &gt; hwclock/hwclock.c
39mkdir -pv /var/lib/hwclock</userinput></screen>
40
41 </sect2>
42
43 <sect2 role="installation">
44 <title>Installation of Util-linux</title>
45
46 <para os="p1">Util-linux fails to compile against newer versions of
47 Linux kernel headers. The following patch properly fixes this issue:</para>
48
49<screen os="p2"><userinput>patch -Np1 -i ../&util-linux-cramfs-patch;</userinput></screen>
50
51 <para os="p3">The following patch fixes build issues with GCC &gcc-version;:</para>
52
53<screen os="p4"><userinput>patch -Np1 -i ../&util-linux-gcc4_fixes-patch;</userinput></screen>
54
55 <para os="s1">The following sed prevents the installed files from being
56 owned by root</para>
57
58<screen os="s2"><userinput>cp MCONFIG{,.orig}
59sed -e "s/-o root//" MCONFIG.orig > MCONFIG</userinput></screen>
60
61 <para os="a">Prepare Util-linux for compilation:</para>
62
63<screen os="b"><userinput>./configure</userinput></screen>
64
65 <para os="c">Compile the package:</para>
66
67<screen os="d"><userinput>make HAVE_KILL=yes HAVE_SLN=yes \
68CPUOPT="" ARCH="" CPU=""</userinput></screen>
69
70 <variablelist os="e">
71 <title>The meaning of the make parameters:</title>
72
73 <varlistentry os="e1">
74 <term><parameter>HAVE_KILL=yes</parameter></term>
75 <listitem>
76 <para>This prevents the <command>kill</command> program (already
77 installed by Procps) from being built and installed again.</para>
78 </listitem>
79 </varlistentry>
80
81 <varlistentry os="e2">
82 <term><parameter>HAVE_SLN=yes</parameter></term>
83 <listitem>
84 <para>This prevents the <command>sln</command> program (a
85 statically linked version of <command>ln</command> already installed
86 by Glibc) from being built and installed again.</para>
87 </listitem>
88 </varlistentry>
89
90 <varlistentry os="e3">
91 <term><parameter>CPUOPT=""</parameter></term>
92 <listitem>
93 <para>This disables any compiler optimizations by CPU type.</para>
94 </listitem>
95 </varlistentry>
96
97 <varlistentry os="e4">
98 <term><parameter>ARCH=""</parameter></term>
99 <listitem>
100 <para>This disables the detection of the architecture.</para>
101 </listitem>
102 </varlistentry>
103
104 <varlistentry os="e5">
105 <term><parameter>CPU=""</parameter></term>
106 <listitem>
107 <para>This disables the detection of the CPU.</para>
108 </listitem>
109 </varlistentry>
110
111 </variablelist>
112
113 <para os="f">Install the package and move the <command>logger</command> binary
114 to <filename class="directory">/bin</filename> as it is needed by the
115 LFS-Bootscripts package:</para>
116
117<screen os="g"><userinput>make HAVE_KILL=yes HAVE_SLN=yes \
118CPUOPT="" ARCH="" CPU="" USE_TTY_GROUP=no DESTDIR=${LFS} install
119mv -v ${LFS}/usr/bin/logger ${LFS}/bin</userinput></screen>
120
121 </sect2>
122
123 <sect2 id="contents-util-linux" role="content">
124 <title>Contents of Util-linux</title>
125
126 <segmentedlist>
127 <segtitle>Installed programs</segtitle>
128
129 <seglistitem>
130 <seg>agetty, arch, blockdev, cal, cfdisk, chkdupexe, col, colcrt,
131 colrm, column, ctrlaltdel, cytune, ddate, dmesg, elvtune, fdformat,
132 fdisk, fsck.cramfs, fsck.minix, getopt, hexdump, hwclock, ipcrm,
133 ipcs, isosize, line, logger, look, losetup, mcookie, mkfs, mkfs.bfs,
134 mkfs.cramfs, mkfs.minix, mkswap, more, mount, namei, pg, pivot_root,
135 ramsize (link to rdev), raw, rdev, readprofile, rename, renice, rev,
136 rootflags (link to rdev), script, setfdprm, setsid, setterm, sfdisk,
137 swapdev, swapoff (link to swapon), swapon, tunelp, ul, umount, vidmode
138 (link to rdev), whereis, and write</seg>
139 </seglistitem>
140 </segmentedlist>
141
142 <variablelist>
143 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
144 <?dbfo list-presentation="list"?>
145 <?dbhtml list-presentation="table"?>
146
147 <varlistentry id="agetty">
148 <term><command>agetty</command></term>
149 <listitem>
150 <para>Opens a tty port, prompts for a login name,
151 and then invokes the <command>login</command> program</para>
152 <indexterm zone="ch-system-util-linux agetty">
153 <primary sortas="b-agetty">agetty</primary>
154 </indexterm>
155 </listitem>
156 </varlistentry>
157
158 <varlistentry id="arch">
159 <term><command>arch</command></term>
160 <listitem>
161 <para>Reports the machine's architecture</para>
162 <indexterm zone="ch-system-util-linux arch">
163 <primary sortas="b-arch">arch</primary>
164 </indexterm>
165 </listitem>
166 </varlistentry>
167
168 <varlistentry id="blockdev">
169 <term><command>blockdev</command></term>
170 <listitem>
171 <para>Allows users to call block device ioctls from the command
172 line</para>
173 <indexterm zone="ch-system-util-linux blockdev">
174 <primary sortas="b-blockdev">blockdev</primary>
175 </indexterm>
176 </listitem>
177 </varlistentry>
178
179 <varlistentry id="cal">
180 <term><command>cal</command></term>
181 <listitem>
182 <para>Displays a simple calendar</para>
183 <indexterm zone="ch-system-util-linux cal">
184 <primary sortas="b-cal">cal</primary>
185 </indexterm>
186 </listitem>
187 </varlistentry>
188
189 <varlistentry id="cfdisk">
190 <term><command>cfdisk</command></term>
191 <listitem>
192 <para>Manipulates the partition table of the given device</para>
193 <indexterm zone="ch-system-util-linux cfdisk">
194 <primary sortas="b-cfdisk">cfdisk</primary>
195 </indexterm>
196 </listitem>
197 </varlistentry>
198
199 <varlistentry id="chkdupexe">
200 <term><command>chkdupexe</command></term>
201 <listitem>
202 <para>Finds duplicate executables</para>
203 <indexterm zone="ch-system-util-linux chkdupexe">
204 <primary sortas="b-chkdupexe">chkdupexe</primary>
205 </indexterm>
206 </listitem>
207 </varlistentry>
208
209 <varlistentry id="col">
210 <term><command>col</command></term>
211 <listitem>
212 <para>Filters out reverse line feeds</para>
213 <indexterm zone="ch-system-util-linux col">
214 <primary sortas="b-col">col</primary>
215 </indexterm>
216 </listitem>
217 </varlistentry>
218
219 <varlistentry id="colcrt">
220 <term><command>colcrt</command></term>
221 <listitem>
222 <para>Filters <command>nroff</command> output for terminals
223 that lack some capabilities, such as overstriking and half-lines</para>
224 <indexterm zone="ch-system-util-linux colcrt">
225 <primary sortas="b-colcrt">colcrt</primary>
226 </indexterm>
227 </listitem>
228 </varlistentry>
229
230 <varlistentry id="colrm">
231 <term><command>colrm</command></term>
232 <listitem>
233 <para>Filters out the given columns</para>
234 <indexterm zone="ch-system-util-linux colrm">
235 <primary sortas="b-colrm">colrm</primary>
236 </indexterm>
237 </listitem>
238 </varlistentry>
239
240 <varlistentry id="column">
241 <term><command>column</command></term>
242 <listitem>
243 <para>Formats a given file into multiple columns</para>
244 <indexterm zone="ch-system-util-linux column">
245 <primary sortas="b-column">column</primary>
246 </indexterm>
247 </listitem>
248 </varlistentry>
249
250 <varlistentry id="ctrlaltdel">
251 <term><command>ctrlaltdel</command></term>
252 <listitem>
253 <para>Sets the function of the Ctrl+Alt+Del key combination to a
254 hard or a soft reset</para>
255 <indexterm zone="ch-system-util-linux ctrlaltdel">
256 <primary sortas="b-ctrlaltdel">ctrlaltdel</primary>
257 </indexterm>
258 </listitem>
259 </varlistentry>
260
261 <varlistentry id="cytune">
262 <term><command>cytune</command></term>
263 <listitem>
264 <para>Tunes the parameters of the serial line drivers for
265 Cyclades cards</para>
266 <indexterm zone="ch-system-util-linux cytune">
267 <primary sortas="b-cytune">cytune</primary>
268 </indexterm>
269 </listitem>
270 </varlistentry>
271
272 <varlistentry id="ddate">
273 <term><command>ddate</command></term>
274 <listitem>
275 <para>Gives the Discordian date or converts the given Gregorian date
276 to a Discordian one</para>
277 <indexterm zone="ch-system-util-linux ddate">
278 <primary sortas="b-ddate">ddate</primary>
279 </indexterm>
280 </listitem>
281 </varlistentry>
282
283 <varlistentry id="dmesg">
284 <term><command>dmesg</command></term>
285 <listitem>
286 <para>Dumps the kernel boot messages</para>
287 <indexterm zone="ch-system-util-linux dmesg">
288 <primary sortas="b-dmesg">dmesg</primary>
289 </indexterm>
290 </listitem>
291 </varlistentry>
292
293 <varlistentry id="elvtune">
294 <term><command>elvtune</command></term>
295 <listitem>
296 <para>Tunes the performance and interactivity of a block
297 device</para>
298 <indexterm zone="ch-system-util-linux elvtune">
299 <primary sortas="b-elvtune">elvtune</primary>
300 </indexterm>
301 </listitem>
302 </varlistentry>
303
304 <varlistentry id="fdformat">
305 <term><command>fdformat</command></term>
306 <listitem>
307 <para>Low-level formats a floppy disk</para>
308 <indexterm zone="ch-system-util-linux fdformat">
309 <primary sortas="b-fdformat">fdformat</primary>
310 </indexterm>
311 </listitem>
312 </varlistentry>
313
314 <varlistentry id="fdisk">
315 <term><command>fdisk</command></term>
316 <listitem>
317 <para>Manipulates the partition table of the given device</para>
318 <indexterm zone="ch-system-util-linux fdisk">
319 <primary sortas="b-fdisk">fdisk</primary>
320 </indexterm>
321 </listitem>
322 </varlistentry>
323
324 <varlistentry id="fsck.cramfs">
325 <term><command>fsck.cramfs</command></term>
326 <listitem>
327 <para>Performs a consistency check on the Cramfs file system on the
328 given device</para>
329 <indexterm zone="ch-system-util-linux fsck.cramfs">
330 <primary sortas="b-fsck.cramfs">fsck.cramfs</primary>
331 </indexterm>
332 </listitem>
333 </varlistentry>
334
335 <varlistentry id="fsck.minix">
336 <term><command>fsck.minix</command></term>
337 <listitem>
338 <para>Performs a consistency check on the Minix file system on the
339 given device</para>
340 <indexterm zone="ch-system-util-linux fsck.minix">
341 <primary sortas="b-fsck.minix">fsck.minix</primary>
342 </indexterm>
343 </listitem>
344 </varlistentry>
345
346 <varlistentry id="getopt">
347 <term><command>getopt</command></term>
348 <listitem>
349 <para>Parses options in the given command line</para>
350 <indexterm zone="ch-system-util-linux getopt">
351 <primary sortas="b-getopt">getopt</primary>
352 </indexterm>
353 </listitem>
354 </varlistentry>
355
356 <varlistentry id="hexdump">
357 <term><command>hexdump</command></term>
358 <listitem>
359 <para>Dumps the given file in hexadecimal or in another given
360 format</para>
361 <indexterm zone="ch-system-util-linux hexdump">
362 <primary sortas="b-hexdump">hexdump</primary>
363 </indexterm>
364 </listitem>
365 </varlistentry>
366
367 <varlistentry id="hwclock">
368 <term><command>hwclock</command></term>
369 <listitem>
370 <para>Reads or sets the system's hardware clock, also called
371 the Real-Time Clock (RTC) or Basic Input-Output System (BIOS)
372 clock</para>
373 <indexterm zone="ch-system-util-linux hwclock">
374 <primary sortas="b-hwclock">hwclock</primary>
375 </indexterm>
376 </listitem>
377 </varlistentry>
378
379 <varlistentry id="ipcrm">
380 <term><command>ipcrm</command></term>
381 <listitem>
382 <para>Removes the given Inter-Process Communication (IPC) resource</para>
383 <indexterm zone="ch-system-util-linux ipcrm">
384 <primary sortas="b-ipcrm">ipcrm</primary>
385 </indexterm>
386 </listitem>
387 </varlistentry>
388
389 <varlistentry id="ipcs">
390 <term><command>ipcs</command></term>
391 <listitem>
392 <para>Provides IPC status information</para>
393 <indexterm zone="ch-system-util-linux ipcs">
394 <primary sortas="b-ipcs">ipcs</primary>
395 </indexterm>
396 </listitem>
397 </varlistentry>
398
399 <varlistentry id="isosize">
400 <term><command>isosize</command></term>
401 <listitem>
402 <para>Reports the size of an iso9660 file system</para>
403 <indexterm zone="ch-system-util-linux isosize">
404 <primary sortas="b-isosize">isosize</primary>
405 </indexterm>
406 </listitem>
407 </varlistentry>
408
409 <varlistentry id="line">
410 <term><command>line</command></term>
411 <listitem>
412 <para>Copies a single line</para>
413 <indexterm zone="ch-system-util-linux line">
414 <primary sortas="b-line">line</primary>
415 </indexterm>
416 </listitem>
417 </varlistentry>
418
419 <varlistentry id="logger">
420 <term><command>logger</command></term>
421 <listitem>
422 <para>Enters the given message into the system log</para>
423 <indexterm zone="ch-system-util-linux logger">
424 <primary sortas="b-logger">logger</primary>
425 </indexterm>
426 </listitem>
427 </varlistentry>
428
429 <varlistentry id="look">
430 <term><command>look</command></term>
431 <listitem>
432 <para>Displays lines that begin with the given string</para>
433 <indexterm zone="ch-system-util-linux look">
434 <primary sortas="b-look">look</primary>
435 </indexterm>
436 </listitem>
437 </varlistentry>
438
439 <varlistentry id="losetup">
440 <term><command>losetup</command></term>
441 <listitem>
442 <para>Sets up and controls loop devices</para>
443 <indexterm zone="ch-system-util-linux losetup">
444 <primary sortas="b-losetup">losetup</primary>
445 </indexterm>
446 </listitem>
447 </varlistentry>
448
449 <varlistentry id="mcookie">
450 <term><command>mcookie</command></term>
451 <listitem>
452 <para>Generates magic cookies (128-bit random hexadecimal numbers) for
453 <command>xauth</command></para>
454 <indexterm zone="ch-system-util-linux mcookie">
455 <primary sortas="b-mcookie">mcookie</primary>
456 </indexterm>
457 </listitem>
458 </varlistentry>
459
460 <varlistentry id="mkfs">
461 <term><command>mkfs</command></term>
462 <listitem>
463 <para>Builds a file system on a device (usually a hard disk
464 partition)</para>
465 <indexterm zone="ch-system-util-linux mkfs">
466 <primary sortas="b-mkfs">mkfs</primary>
467 </indexterm>
468 </listitem>
469 </varlistentry>
470
471 <varlistentry id="mkfs.bfs">
472 <term><command>mkfs.bfs</command></term>
473 <listitem>
474 <para>Creates a Santa Cruz Operations (SCO) bfs file system</para>
475 <indexterm zone="ch-system-util-linux mkfs.bfs">
476 <primary sortas="b-mkfs.bfs">mkfs.bfs</primary>
477 </indexterm>
478 </listitem>
479 </varlistentry>
480
481 <varlistentry id="mkfs.cramfs">
482 <term><command>mkfs.cramfs</command></term>
483 <listitem>
484 <para>Creates a cramfs file system</para>
485 <indexterm zone="ch-system-util-linux mkfs.cramfs">
486 <primary sortas="b-mkfs.cramfs">mkfs.cramfs</primary>
487 </indexterm>
488 </listitem>
489 </varlistentry>
490
491 <varlistentry id="mkfs.minix">
492 <term><command>mkfs.minix</command></term>
493 <listitem>
494 <para>Creates a Minix file system</para>
495 <indexterm zone="ch-system-util-linux mkfs.minix">
496 <primary sortas="b-mkfs.minix">mkfs.minix</primary>
497 </indexterm>
498 </listitem>
499 </varlistentry>
500
501 <varlistentry id="mkswap">
502 <term><command>mkswap</command></term>
503 <listitem>
504 <para>Initializes the given device or file to be used as a swap
505 area</para>
506 <indexterm zone="ch-system-util-linux mkswap">
507 <primary sortas="b-mkswap">mkswap</primary>
508 </indexterm>
509 </listitem>
510 </varlistentry>
511
512 <varlistentry id="more">
513 <term><command>more</command></term>
514 <listitem>
515 <para>A filter for paging through text one screen at a time</para>
516 <indexterm zone="ch-system-util-linux more">
517 <primary sortas="b-more">more</primary>
518 </indexterm>
519 </listitem>
520 </varlistentry>
521
522 <varlistentry id="mount">
523 <term><command>mount</command></term>
524 <listitem>
525 <para>Attaches the file system on the given device to a specified
526 directory in the file-system tree</para>
527 <indexterm zone="ch-system-util-linux mount">
528 <primary sortas="b-mount">mount</primary>
529 </indexterm>
530 </listitem>
531 </varlistentry>
532
533 <varlistentry id="namei">
534 <term><command>namei</command></term>
535 <listitem>
536 <para>Shows the symbolic links in the given pathnames</para>
537 <indexterm zone="ch-system-util-linux namei">
538 <primary sortas="b-namei">namei</primary>
539 </indexterm>
540 </listitem>
541 </varlistentry>
542
543 <varlistentry id="pg">
544 <term><command>pg</command></term>
545 <listitem>
546 <para>Displays a text file one screen full at a time</para>
547 <indexterm zone="ch-system-util-linux pg">
548 <primary sortas="b-pg">pg</primary>
549 </indexterm>
550 </listitem>
551 </varlistentry>
552
553 <varlistentry id="pivot_root">
554 <term><command>pivot_root</command></term>
555 <listitem>
556 <para>Makes the given file system the new root file system of the
557 current process</para>
558 <indexterm zone="ch-system-util-linux pivot_root">
559 <primary sortas="b-pivot_root">pivot_root</primary>
560 </indexterm>
561 </listitem>
562 </varlistentry>
563
564 <varlistentry id="ramsize">
565 <term><command>ramsize</command></term>
566 <listitem>
567 <para>Sets the size of the RAM disk in a bootable image</para>
568 <indexterm zone="ch-system-util-linux ramsize">
569 <primary sortas="b-ramsize">ramsize</primary>
570 </indexterm>
571 </listitem>
572 </varlistentry>
573
574 <varlistentry id="raw">
575 <term><command>raw</command></term>
576 <listitem>
577 <para>Used to bind a Linux raw character device to a block
578 device</para>
579 <indexterm zone="ch-system-util-linux raw">
580 <primary sortas="b-raw">raw</primary>
581 </indexterm>
582 </listitem>
583 </varlistentry>
584
585 <varlistentry id="rdev">
586 <term><command>rdev</command></term>
587 <listitem>
588 <para>Queries and sets the root device, among other things, in a
589 bootable image</para>
590 <indexterm zone="ch-system-util-linux rdev">
591 <primary sortas="b-rdev">rdev</primary>
592 </indexterm>
593 </listitem>
594 </varlistentry>
595
596 <varlistentry id="readprofile">
597 <term><command>readprofile</command></term>
598 <listitem>
599 <para>Reads kernel profiling information</para>
600 <indexterm zone="ch-system-util-linux readprofile">
601 <primary sortas="b-readprofile">readprofile</primary>
602 </indexterm>
603 </listitem>
604 </varlistentry>
605
606 <varlistentry id="rename">
607 <term><command>rename</command></term>
608 <listitem>
609 <para>Renames the given files, replacing a given string with
610 another</para>
611 <indexterm zone="ch-system-util-linux rename">
612 <primary sortas="b-rename">rename</primary>
613 </indexterm>
614 </listitem>
615 </varlistentry>
616
617 <varlistentry id="renice">
618 <term><command>renice</command></term>
619 <listitem>
620 <para>Alters the priority of running processes</para>
621 <indexterm zone="ch-system-util-linux renice">
622 <primary sortas="b-renice">renice</primary>
623 </indexterm>
624 </listitem>
625 </varlistentry>
626
627 <varlistentry id="rev">
628 <term><command>rev</command></term>
629 <listitem>
630 <para>Reverses the lines of a given file</para>
631 <indexterm zone="ch-system-util-linux rev">
632 <primary sortas="b-rev">rev</primary>
633 </indexterm>
634 </listitem>
635 </varlistentry>
636
637 <varlistentry id="rootflags">
638 <term><command>rootflags</command></term>
639 <listitem>
640 <para>Sets the rootflags in a bootable image</para>
641 <indexterm zone="ch-system-util-linux rootflags">
642 <primary sortas="b-rootflags">rootflags</primary>
643 </indexterm>
644 </listitem>
645 </varlistentry>
646
647 <varlistentry id="script">
648 <term><command>script</command></term>
649 <listitem>
650 <para>Makes a typescript of a terminal session</para>
651 <indexterm zone="ch-system-util-linux script">
652 <primary sortas="b-script">script</primary>
653 </indexterm>
654 </listitem>
655 </varlistentry>
656
657 <varlistentry id="setfdprm">
658 <term><command>setfdprm</command></term>
659 <listitem>
660 <para>Sets user-provided floppy disk parameters</para>
661 <indexterm zone="ch-system-util-linux setfdprm">
662 <primary sortas="b-setfdprm">setfdprm</primary>
663 </indexterm>
664 </listitem>
665 </varlistentry>
666
667 <varlistentry id="setsid">
668 <term><command>setsid</command></term>
669 <listitem>
670 <para>Runs the given program in a new session</para>
671 <indexterm zone="ch-system-util-linux setsid">
672 <primary sortas="b-setsid">setsid</primary>
673 </indexterm>
674 </listitem>
675 </varlistentry>
676
677 <varlistentry id="setterm">
678 <term><command>setterm</command></term>
679 <listitem>
680 <para>Sets terminal attributes</para>
681 <indexterm zone="ch-system-util-linux setterm">
682 <primary sortas="b-setterm">setterm</primary>
683 </indexterm>
684 </listitem>
685 </varlistentry>
686
687 <varlistentry id="sfdisk">
688 <term><command>sfdisk</command></term>
689 <listitem>
690 <para>A disk partition table manipulator</para>
691 <indexterm zone="ch-system-util-linux sfdisk">
692 <primary sortas="b-sfdisk">sfdisk</primary>
693 </indexterm>
694 </listitem>
695 </varlistentry>
696
697 <varlistentry id="swapdev">
698 <term><command>swapdev</command></term>
699 <listitem>
700 <para>Sets the swap device in a bootable image</para>
701 <indexterm zone="ch-system-util-linux swapdev">
702 <primary sortas="b-swapdev">swapdev</primary>
703 </indexterm>
704 </listitem>
705 </varlistentry>
706
707 <varlistentry id="swapoff">
708 <term><command>swapoff</command></term>
709 <listitem>
710 <para>Disables devices and files for paging and swapping</para>
711 <indexterm zone="ch-system-util-linux swapoff">
712 <primary sortas="b-swapoff">swapoff</primary>
713 </indexterm>
714 </listitem>
715 </varlistentry>
716
717 <varlistentry id="swapon">
718 <term><command>swapon</command></term>
719 <listitem>
720 <para>Enables devices and files for paging and swapping and
721 lists the devices and files currently in use</para>
722 <indexterm zone="ch-system-util-linux swapon">
723 <primary sortas="b-swapon">swapon</primary>
724 </indexterm>
725 </listitem>
726 </varlistentry>
727
728 <varlistentry id="tunelp">
729 <term><command>tunelp</command></term>
730 <listitem>
731 <para>Tunes the parameters of the line printer</para>
732 <indexterm zone="ch-system-util-linux tunelp">
733 <primary sortas="b-tunelp">tunelp</primary>
734 </indexterm>
735 </listitem>
736 </varlistentry>
737
738 <varlistentry id="ul">
739 <term><command>ul</command></term>
740 <listitem>
741 <para>A filter for translating underscores into escape sequences
742 indicating underlining for the terminal in use</para>
743 <indexterm zone="ch-system-util-linux ul">
744 <primary sortas="b-ul">ul</primary>
745 </indexterm>
746 </listitem>
747 </varlistentry>
748
749 <varlistentry id="umount">
750 <term><command>umount</command></term>
751 <listitem>
752 <para>Disconnects a file system from the system's file tree</para>
753 <indexterm zone="ch-system-util-linux umount">
754 <primary sortas="b-umount">umount</primary>
755 </indexterm>
756 </listitem>
757 </varlistentry>
758
759 <varlistentry id="vidmode">
760 <term><command>vidmode</command></term>
761 <listitem>
762 <para>Sets the video mode in a bootable image</para>
763 <indexterm zone="ch-system-util-linux vidmode">
764 <primary sortas="b-vidmode">vidmode</primary>
765 </indexterm>
766 </listitem>
767 </varlistentry>
768
769 <varlistentry id="whereis">
770 <term><command>whereis</command></term>
771 <listitem>
772 <para>Reports the location of the binary, source, and man page
773 for the given command</para>
774 <indexterm zone="ch-system-util-linux whereis">
775 <primary sortas="b-whereis">whereis</primary>
776 </indexterm>
777 </listitem>
778 </varlistentry>
779
780 <varlistentry id="write">
781 <term><command>write</command></term>
782 <listitem>
783 <para>Sends a message to the given user <emphasis>if</emphasis> that
784 user has not disabled receipt of such messages</para>
785 <indexterm zone="ch-system-util-linux write">
786 <primary sortas="b-write">write</primary>
787 </indexterm>
788 </listitem>
789 </varlistentry>
790
791 </variablelist>
792
793 </sect2>
794
795</sect1>
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