source: chapter06/util-linux.xml@ ddd5542

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Last change on this file since ddd5542 was ddd5542, checked in by Manuel Canales Esparcia <manuel@…>, 18 years ago

Finished the XML indentation plus few tags changes.

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@7369 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

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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. Among
21 them are utilities for handling file systems, consoles, partitions, and
22 messages.</para>
23
24 <segmentedlist>
25 <segtitle>&buildtime;</segtitle>
26 <segtitle>&diskspace;</segtitle>
27
28 <seglistitem>
29 <seg>0.2 SBU</seg>
30 <seg>11.6 MB</seg>
31 </seglistitem>
32 </segmentedlist>
33
34 <segmentedlist>
35 <segtitle>&dependencies;</segtitle>
36
37 <seglistitem>
38 <seg>Bash, Binutils, Coreutils, Diffutils, GCC, Gettext, Glibc,
39 Grep, Make, Ncurses, Sed, and Zlib</seg>
40 </seglistitem>
41 </segmentedlist>
42
43 </sect2>
44
45 <sect2 role="installation">
46 <title>FHS compliance notes</title>
47
48 <para>The FHS recommends using the <filename
49 class="directory">/var/lib/hwclock</filename> directory instead of the
50 usual <filename class="directory">/etc</filename> directory as the
51 location for the <filename>adjtime</filename> file. To make the
52 <command>hwclock</command> program FHS-compliant, run the
53 following:</para>
54
55<screen><userinput>sed -i 's@etc/adjtime@var/lib/hwclock/adjtime@g' \
56 hwclock/hwclock.c
57mkdir -p /var/lib/hwclock</userinput></screen>
58
59 </sect2>
60
61 <sect2 role="installation">
62 <title>Installation of Util-linux</title>
63
64 <para>Util-linux fails to compile against newer versions of Linux-Libc-Headers.
65 The following patch properly fixes this issue:</para>
66
67<screen><userinput>patch -Np1 -i ../&util-linux-cramfs-patch;</userinput></screen>
68
69 <para>Prepare Util-linux for compilation:</para>
70
71<screen><userinput>./configure</userinput></screen>
72
73 <para>Compile the package:</para>
74
75<screen><userinput>make HAVE_KILL=yes HAVE_SLN=yes</userinput></screen>
76
77 <variablelist>
78 <title>The meaning of the make parameters:</title>
79
80 <varlistentry>
81 <term><parameter>HAVE_KILL=yes</parameter></term>
82 <listitem>
83 <para>This prevents the <command>kill</command> program (already
84 installed by Procps) from being built and installed again.</para>
85 </listitem>
86 </varlistentry>
87
88 <varlistentry>
89 <term><parameter>HAVE_SLN=yes</parameter></term>
90 <listitem>
91 <para>This prevents the <command>sln</command> program (a
92 statically linked version of <command>ln</command> already installed
93 by Glibc) from being built and installed again.</para>
94 </listitem>
95 </varlistentry>
96
97 </variablelist>
98
99 <para>This package does not come with a test suite.</para>
100
101 <para>Install the package and move the <command>logger</command> binary to
102 <filename class="directory">/bin</filename> as it is needed by the
103 LFS-Bootscripts package:</para>
104
105<screen><userinput>make HAVE_KILL=yes HAVE_SLN=yes install
106mv /usr/bin/logger /bin</userinput></screen>
107
108 </sect2>
109
110 <sect2 id="contents-utillinux" role="content">
111 <title>Contents of Util-linux</title>
112
113 <segmentedlist>
114 <segtitle>Installed programs</segtitle>
115
116 <seglistitem>
117 <seg>agetty, arch, blockdev, cal, cfdisk, chkdupexe, col, colcrt,
118 colrm, column, ctrlaltdel, cytune, ddate, dmesg, elvtune, fdformat,
119 fdisk, fsck.cramfs, fsck.minix, getopt, hexdump, hwclock, ipcrm,
120 ipcs, isosize, line, logger, look, losetup, mcookie, mkfs, mkfs.bfs,
121 mkfs.cramfs, mkfs.minix, mkswap, more, mount, namei, pg, pivot_root,
122 ramsize (link to rdev), raw, rdev, readprofile, rename, renice, rev,
123 rootflags (link to rdev), script, setfdprm, setsid, setterm, sfdisk,
124 swapdev, swapoff (link to swapon), swapon, tunelp, ul, umount, vidmode
125 (link to rdev), whereis, and write</seg>
126 </seglistitem>
127 </segmentedlist>
128
129 <variablelist>
130 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
131 <?dbfo list-presentation="list"?>
132 <?dbhtml list-presentation="table"?>
133
134 <varlistentry id="agetty">
135 <term><command>agetty</command></term>
136 <listitem>
137 <para>Opens a tty port, prompts for a login name,
138 and then invokes the <command>login</command> program</para>
139 <indexterm zone="ch-system-util-linux agetty">
140 <primary sortas="b-agetty">agetty</primary>
141 </indexterm>
142 </listitem>
143 </varlistentry>
144
145 <varlistentry id="arch">
146 <term><command>arch</command></term>
147 <listitem>
148 <para>Reports the machine's architecture</para>
149 <indexterm zone="ch-system-util-linux arch">
150 <primary sortas="b-arch">arch</primary>
151 </indexterm>
152 </listitem>
153 </varlistentry>
154
155 <varlistentry id="blockdev">
156 <term><command>blockdev</command></term>
157 <listitem>
158 <para>Allows users to call block device ioctls from the command
159 line</para>
160 <indexterm zone="ch-system-util-linux blockdev">
161 <primary sortas="b-blockdev">blockdev</primary>
162 </indexterm>
163 </listitem>
164 </varlistentry>
165
166 <varlistentry id="cal">
167 <term><command>cal</command></term>
168 <listitem>
169 <para>Displays a simple calendar</para>
170 <indexterm zone="ch-system-util-linux cal">
171 <primary sortas="b-cal">cal</primary>
172 </indexterm>
173 </listitem>
174 </varlistentry>
175
176 <varlistentry id="cfdisk">
177 <term><command>cfdisk</command></term>
178 <listitem>
179 <para>Manipulates the partition table of the given device</para>
180 <indexterm zone="ch-system-util-linux cfdisk">
181 <primary sortas="b-cfdisk">cfdisk</primary>
182 </indexterm>
183 </listitem>
184 </varlistentry>
185
186 <varlistentry id="chkdupexe">
187 <term><command>chkdupexe</command></term>
188 <listitem>
189 <para>Finds duplicate executables</para>
190 <indexterm zone="ch-system-util-linux chkdupexe">
191 <primary sortas="b-chkdupexe">chkdupexe</primary>
192 </indexterm>
193 </listitem>
194 </varlistentry>
195
196 <varlistentry id="col">
197 <term><command>col</command></term>
198 <listitem>
199 <para>Filters out reverse line feeds</para>
200 <indexterm zone="ch-system-util-linux col">
201 <primary sortas="b-col">col</primary>
202 </indexterm>
203 </listitem>
204 </varlistentry>
205
206 <varlistentry id="colcrt">
207 <term><command>colcrt</command></term>
208 <listitem>
209 <para>Filters <command>nroff</command> output for terminals
210 that lack some capabilities, such as overstriking and half-lines</para>
211 <indexterm zone="ch-system-util-linux colcrt">
212 <primary sortas="b-colcrt">colcrt</primary>
213 </indexterm>
214 </listitem>
215 </varlistentry>
216
217 <varlistentry id="colrm">
218 <term><command>colrm</command></term>
219 <listitem>
220 <para>Filters out the given columns</para>
221 <indexterm zone="ch-system-util-linux colrm">
222 <primary sortas="b-colrm">colrm</primary>
223 </indexterm>
224 </listitem>
225 </varlistentry>
226
227 <varlistentry id="column">
228 <term><command>column</command></term>
229 <listitem>
230 <para>Formats a given file into multiple columns</para>
231 <indexterm zone="ch-system-util-linux column">
232 <primary sortas="b-column">column</primary>
233 </indexterm>
234 </listitem>
235 </varlistentry>
236
237 <varlistentry id="ctrlaltdel">
238 <term><command>ctrlaltdel</command></term>
239 <listitem>
240 <para>Sets the function of the Ctrl+Alt+Del key combination to a
241 hard or a soft reset</para>
242 <indexterm zone="ch-system-util-linux ctrlaltdel">
243 <primary sortas="b-ctrlaltdel">ctrlaltdel</primary>
244 </indexterm>
245 </listitem>
246 </varlistentry>
247
248 <varlistentry id="cytune">
249 <term><command>cytune</command></term>
250 <listitem>
251 <para>Tunes the parameters of the serial line drivers for
252 Cyclades cards</para>
253 <indexterm zone="ch-system-util-linux cytune">
254 <primary sortas="b-cytune">cytune</primary>
255 </indexterm>
256 </listitem>
257 </varlistentry>
258
259 <varlistentry id="ddate">
260 <term><command>ddate</command></term>
261 <listitem>
262 <para>Gives the Discordian date or converts the given Gregorian date
263 to a Discordian one</para>
264 <indexterm zone="ch-system-util-linux ddate">
265 <primary sortas="b-ddate">ddate</primary>
266 </indexterm>
267 </listitem>
268 </varlistentry>
269
270 <varlistentry id="dmesg">
271 <term><command>dmesg</command></term>
272 <listitem>
273 <para>Dumps the kernel boot messages</para>
274 <indexterm zone="ch-system-util-linux dmesg">
275 <primary sortas="b-dmesg">dmesg</primary>
276 </indexterm>
277 </listitem>
278 </varlistentry>
279
280 <varlistentry id="elvtune">
281 <term><command>elvtune</command></term>
282 <listitem>
283 <para>Tunes the performance and interactivity of a block
284 device</para>
285 <indexterm zone="ch-system-util-linux elvtune">
286 <primary sortas="b-elvtune">elvtune</primary>
287 </indexterm>
288 </listitem>
289 </varlistentry>
290
291 <varlistentry id="fdformat">
292 <term><command>fdformat</command></term>
293 <listitem>
294 <para>Low-level formats a floppy disk</para>
295 <indexterm zone="ch-system-util-linux fdformat">
296 <primary sortas="b-fdformat">fdformat</primary>
297 </indexterm>
298 </listitem>
299 </varlistentry>
300
301 <varlistentry id="fdisk">
302 <term><command>fdisk</command></term>
303 <listitem>
304 <para>Manipulates the partition table of the given device</para>
305 <indexterm zone="ch-system-util-linux fdisk">
306 <primary sortas="b-fdisk">fdisk</primary>
307 </indexterm>
308 </listitem>
309 </varlistentry>
310
311 <varlistentry id="fsck.cramfs">
312 <term><command>fsck.cramfs</command></term>
313 <listitem>
314 <para>Performs a consistency check on the Cramfs file system on the
315 given device</para>
316 <indexterm zone="ch-system-util-linux fsck.cramfs">
317 <primary sortas="b-fsck.cramfs">fsck.cramfs</primary>
318 </indexterm>
319 </listitem>
320 </varlistentry>
321
322 <varlistentry id="fsck.minix">
323 <term><command>fsck.minix</command></term>
324 <listitem>
325 <para>Performs a consistency check on the Minix file system on the
326 given device</para>
327 <indexterm zone="ch-system-util-linux fsck.minix">
328 <primary sortas="b-fsck.minix">fsck.minix</primary>
329 </indexterm>
330 </listitem>
331 </varlistentry>
332
333 <varlistentry id="getopt">
334 <term><command>getopt</command></term>
335 <listitem>
336 <para>Parses options in the given command line</para>
337 <indexterm zone="ch-system-util-linux getopt">
338 <primary sortas="b-getopt">getopt</primary>
339 </indexterm>
340 </listitem>
341 </varlistentry>
342
343 <varlistentry id="hexdump">
344 <term><command>hexdump</command></term>
345 <listitem>
346 <para>Dumps the given file in hexadecimal or in another given
347 format</para>
348 <indexterm zone="ch-system-util-linux hexdump">
349 <primary sortas="b-hexdump">hexdump</primary>
350 </indexterm>
351 </listitem>
352 </varlistentry>
353
354 <varlistentry id="hwclock">
355 <term><command>hwclock</command></term>
356 <listitem>
357 <para>Reads or sets the system's hardware clock, also called
358 the Real-Time Clock (RTC) or Basic Input-Output System (BIOS)
359 clock</para>
360 <indexterm zone="ch-system-util-linux hwclock">
361 <primary sortas="b-hwclock">hwclock</primary>
362 </indexterm>
363 </listitem>
364 </varlistentry>
365
366 <varlistentry id="ipcrm">
367 <term><command>ipcrm</command></term>
368 <listitem>
369 <para>Removes the given Inter-Process Communication (IPC) resource</para>
370 <indexterm zone="ch-system-util-linux ipcrm">
371 <primary sortas="b-ipcrm">ipcrm</primary>
372 </indexterm>
373 </listitem>
374 </varlistentry>
375
376 <varlistentry id="ipcs">
377 <term><command>ipcs</command></term>
378 <listitem>
379 <para>Provides IPC status information</para>
380 <indexterm zone="ch-system-util-linux ipcs">
381 <primary sortas="b-ipcs">ipcs</primary>
382 </indexterm>
383 </listitem>
384 </varlistentry>
385
386 <varlistentry id="isosize">
387 <term><command>isosize</command></term>
388 <listitem>
389 <para>Reports the size of an iso9660 file system</para>
390 <indexterm zone="ch-system-util-linux isosize">
391 <primary sortas="b-isosize">isosize</primary>
392 </indexterm>
393 </listitem>
394 </varlistentry>
395
396 <varlistentry id="line">
397 <term><command>line</command></term>
398 <listitem>
399 <para>Copies a single line</para>
400 <indexterm zone="ch-system-util-linux line">
401 <primary sortas="b-line">line</primary>
402 </indexterm>
403 </listitem>
404 </varlistentry>
405
406 <varlistentry id="logger">
407 <term><command>logger</command></term>
408 <listitem>
409 <para>Enters the given message into the system log</para>
410 <indexterm zone="ch-system-util-linux logger">
411 <primary sortas="b-logger">logger</primary>
412 </indexterm>
413 </listitem>
414 </varlistentry>
415
416 <varlistentry id="look">
417 <term><command>look</command></term>
418 <listitem>
419 <para>Displays lines that begin with the given string</para>
420 <indexterm zone="ch-system-util-linux look">
421 <primary sortas="b-look">look</primary>
422 </indexterm>
423 </listitem>
424 </varlistentry>
425
426 <varlistentry id="losetup">
427 <term><command>losetup</command></term>
428 <listitem>
429 <para>Sets up and controls loop devices</para>
430 <indexterm zone="ch-system-util-linux losetup">
431 <primary sortas="b-losetup">losetup</primary>
432 </indexterm>
433 </listitem>
434 </varlistentry>
435
436 <varlistentry id="mcookie">
437 <term><command>mcookie</command></term>
438 <listitem>
439 <para>Generates magic cookies (128-bit random hexadecimal numbers) for
440 <command>xauth</command></para>
441 <indexterm zone="ch-system-util-linux mcookie">
442 <primary sortas="b-mcookie">mcookie</primary>
443 </indexterm>
444 </listitem>
445 </varlistentry>
446
447 <varlistentry id="mkfs">
448 <term><command>mkfs</command></term>
449 <listitem>
450 <para>Builds a file system on a device (usually a hard disk
451 partition)</para>
452 <indexterm zone="ch-system-util-linux mkfs">
453 <primary sortas="b-mkfs">mkfs</primary>
454 </indexterm>
455 </listitem>
456 </varlistentry>
457
458 <varlistentry id="mkfs.bfs">
459 <term><command>mkfs.bfs</command></term>
460 <listitem>
461 <para>Creates a Santa Cruz Operations (SCO) bfs file system</para>
462 <indexterm zone="ch-system-util-linux mkfs.bfs">
463 <primary sortas="b-mkfs.bfs">mkfs.bfs</primary>
464 </indexterm>
465 </listitem>
466 </varlistentry>
467
468 <varlistentry id="mkfs.cramfs">
469 <term><command>mkfs.cramfs</command></term>
470 <listitem>
471 <para>Creates a cramfs file system</para>
472 <indexterm zone="ch-system-util-linux mkfs.cramfs">
473 <primary sortas="b-mkfs.cramfs">mkfs.cramfs</primary>
474 </indexterm>
475 </listitem>
476 </varlistentry>
477
478 <varlistentry id="mkfs.minix">
479 <term><command>mkfs.minix</command></term>
480 <listitem>
481 <para>Creates a Minix file system</para>
482 <indexterm zone="ch-system-util-linux mkfs.minix">
483 <primary sortas="b-mkfs.minix">mkfs.minix</primary>
484 </indexterm>
485 </listitem>
486 </varlistentry>
487
488 <varlistentry id="mkswap">
489 <term><command>mkswap</command></term>
490 <listitem>
491 <para>Initializes the given device or file to be used as a swap
492 area</para>
493 <indexterm zone="ch-system-util-linux mkswap">
494 <primary sortas="b-mkswap">mkswap</primary>
495 </indexterm>
496 </listitem>
497 </varlistentry>
498
499 <varlistentry id="more">
500 <term><command>more</command></term>
501 <listitem>
502 <para>A filter for paging through text one screen at a time</para>
503 <indexterm zone="ch-system-util-linux more">
504 <primary sortas="b-more">more</primary>
505 </indexterm>
506 </listitem>
507 </varlistentry>
508
509 <varlistentry id="mount">
510 <term><command>mount</command></term>
511 <listitem>
512 <para>Attaches the file system on the given device to a specified
513 directory in the file-system tree</para>
514 <indexterm zone="ch-system-util-linux mount">
515 <primary sortas="b-mount">mount</primary>
516 </indexterm>
517 </listitem>
518 </varlistentry>
519
520 <varlistentry id="namei">
521 <term><command>namei</command></term>
522 <listitem>
523 <para>Shows the symbolic links in the given pathnames</para>
524 <indexterm zone="ch-system-util-linux namei">
525 <primary sortas="b-namei">namei</primary>
526 </indexterm>
527 </listitem>
528 </varlistentry>
529
530 <varlistentry id="pg">
531 <term><command>pg</command></term>
532 <listitem>
533 <para>Displays a text file one screen full at a time</para>
534 <indexterm zone="ch-system-util-linux pg">
535 <primary sortas="b-pg">pg</primary>
536 </indexterm>
537 </listitem>
538 </varlistentry>
539
540 <varlistentry id="pivot_root">
541 <term><command>pivot_root</command></term>
542 <listitem>
543 <para>Makes the given file system the new root file system of the
544 current process</para>
545 <indexterm zone="ch-system-util-linux pivot_root">
546 <primary sortas="b-pivot_root">pivot_root</primary>
547 </indexterm>
548 </listitem>
549 </varlistentry>
550
551 <varlistentry id="ramsize">
552 <term><command>ramsize</command></term>
553 <listitem>
554 <para>Sets the size of the RAM disk in a bootable image</para>
555 <indexterm zone="ch-system-util-linux ramsize">
556 <primary sortas="b-ramsize">ramsize</primary>
557 </indexterm>
558 </listitem>
559 </varlistentry>
560
561 <varlistentry id="raw">
562 <term><command>raw</command></term>
563 <listitem>
564 <para>Used to bind a Linux raw character device to a block
565 device</para>
566 <indexterm zone="ch-system-util-linux raw">
567 <primary sortas="b-raw">raw</primary>
568 </indexterm>
569 </listitem>
570 </varlistentry>
571
572 <varlistentry id="rdev">
573 <term><command>rdev</command></term>
574 <listitem>
575 <para>Queries and sets the root device, among other things, in a
576 bootable image</para>
577 <indexterm zone="ch-system-util-linux rdev">
578 <primary sortas="b-rdev">rdev</primary>
579 </indexterm>
580 </listitem>
581 </varlistentry>
582
583 <varlistentry id="readprofile">
584 <term><command>readprofile</command></term>
585 <listitem>
586 <para>Reads kernel profiling information</para>
587 <indexterm zone="ch-system-util-linux readprofile">
588 <primary sortas="b-readprofile">readprofile</primary>
589 </indexterm>
590 </listitem>
591 </varlistentry>
592
593 <varlistentry id="rename">
594 <term><command>rename</command></term>
595 <listitem>
596 <para>Renames the given files, replacing a given string with
597 another</para>
598 <indexterm zone="ch-system-util-linux rename">
599 <primary sortas="b-rename">rename</primary>
600 </indexterm>
601 </listitem>
602 </varlistentry>
603
604 <varlistentry id="renice">
605 <term><command>renice</command></term>
606 <listitem>
607 <para>Alters the priority of running processes</para>
608 <indexterm zone="ch-system-util-linux renice">
609 <primary sortas="b-renice">renice</primary>
610 </indexterm>
611 </listitem>
612 </varlistentry>
613
614 <varlistentry id="rev">
615 <term><command>rev</command></term>
616 <listitem>
617 <para>Reverses the lines of a given file</para>
618 <indexterm zone="ch-system-util-linux rev">
619 <primary sortas="b-rev">rev</primary>
620 </indexterm>
621 </listitem>
622 </varlistentry>
623
624 <varlistentry id="rootflags">
625 <term><command>rootflags</command></term>
626 <listitem>
627 <para>Sets the rootflags in a bootable image</para>
628 <indexterm zone="ch-system-util-linux rootflags">
629 <primary sortas="b-rootflags">rootflags</primary>
630 </indexterm>
631 </listitem>
632 </varlistentry>
633
634 <varlistentry id="script">
635 <term><command>script</command></term>
636 <listitem>
637 <para>Makes a typescript of a terminal session</para>
638 <indexterm zone="ch-system-util-linux script">
639 <primary sortas="b-script">script</primary>
640 </indexterm>
641 </listitem>
642 </varlistentry>
643
644 <varlistentry id="setfdprm">
645 <term><command>setfdprm</command></term>
646 <listitem>
647 <para>Sets user-provided floppy disk parameters</para>
648 <indexterm zone="ch-system-util-linux setfdprm">
649 <primary sortas="b-setfdprm">setfdprm</primary>
650 </indexterm>
651 </listitem>
652 </varlistentry>
653
654 <varlistentry id="setsid">
655 <term><command>setsid</command></term>
656 <listitem>
657 <para>Runs the given program in a new session</para>
658 <indexterm zone="ch-system-util-linux setsid">
659 <primary sortas="b-setsid">setsid</primary>
660 </indexterm>
661 </listitem>
662 </varlistentry>
663
664 <varlistentry id="setterm">
665 <term><command>setterm</command></term>
666 <listitem>
667 <para>Sets terminal attributes</para>
668 <indexterm zone="ch-system-util-linux setterm">
669 <primary sortas="b-setterm">setterm</primary>
670 </indexterm>
671 </listitem>
672 </varlistentry>
673
674 <varlistentry id="sfdisk">
675 <term><command>sfdisk</command></term>
676 <listitem>
677 <para>A disk partition table manipulator</para>
678 <indexterm zone="ch-system-util-linux sfdisk">
679 <primary sortas="b-sfdisk">sfdisk</primary>
680 </indexterm>
681 </listitem>
682 </varlistentry>
683
684 <varlistentry id="swapdev">
685 <term><command>swapdev</command></term>
686 <listitem>
687 <para>Sets the swap device in a bootable image</para>
688 <indexterm zone="ch-system-util-linux swapdev">
689 <primary sortas="b-swapdev">swapdev</primary>
690 </indexterm>
691 </listitem>
692 </varlistentry>
693
694 <varlistentry id="swapoff">
695 <term><command>swapoff</command></term>
696 <listitem>
697 <para>Disables devices and files for paging and swapping</para>
698 <indexterm zone="ch-system-util-linux swapoff">
699 <primary sortas="b-swapoff">swapoff</primary>
700 </indexterm>
701 </listitem>
702 </varlistentry>
703
704 <varlistentry id="swapon">
705 <term><command>swapon</command></term>
706 <listitem>
707 <para>Enables devices and files for paging and swapping and
708 lists the devices and files currently in use</para>
709 <indexterm zone="ch-system-util-linux swapon">
710 <primary sortas="b-swapon">swapon</primary>
711 </indexterm>
712 </listitem>
713 </varlistentry>
714
715 <varlistentry id="tunelp">
716 <term><command>tunelp</command></term>
717 <listitem>
718 <para>Tunes the parameters of the line printer</para>
719 <indexterm zone="ch-system-util-linux tunelp">
720 <primary sortas="b-tunelp">tunelp</primary>
721 </indexterm>
722 </listitem>
723 </varlistentry>
724
725 <varlistentry id="ul">
726 <term><command>ul</command></term>
727 <listitem>
728 <para>A filter for translating underscores into escape sequences
729 indicating underlining for the terminal in use</para>
730 <indexterm zone="ch-system-util-linux ul">
731 <primary sortas="b-ul">ul</primary>
732 </indexterm>
733 </listitem>
734 </varlistentry>
735
736 <varlistentry id="umount">
737 <term><command>umount</command></term>
738 <listitem>
739 <para>Disconnects a file system from the system's file tree</para>
740 <indexterm zone="ch-system-util-linux umount">
741 <primary sortas="b-umount">umount</primary>
742 </indexterm>
743 </listitem>
744 </varlistentry>
745
746 <varlistentry id="vidmode">
747 <term><command>vidmode</command></term>
748 <listitem>
749 <para>Sets the video mode in a bootable image</para>
750 <indexterm zone="ch-system-util-linux vidmode">
751 <primary sortas="b-vidmode">vidmode</primary>
752 </indexterm>
753 </listitem>
754 </varlistentry>
755
756 <varlistentry id="whereis">
757 <term><command>whereis</command></term>
758 <listitem>
759 <para>Reports the location of the binary, source, and man page
760 for the given command</para>
761 <indexterm zone="ch-system-util-linux whereis">
762 <primary sortas="b-whereis">whereis</primary>
763 </indexterm>
764 </listitem>
765 </varlistentry>
766
767 <varlistentry id="write">
768 <term><command>write</command></term>
769 <listitem>
770 <para>Sends a message to the given user <emphasis>if</emphasis> that
771 user has not disabled receipt of such messages</para>
772 <indexterm zone="ch-system-util-linux write">
773 <primary sortas="b-write">write</primary>
774 </indexterm>
775 </listitem>
776 </varlistentry>
777
778 </variablelist>
779
780 </sect2>
781
782</sect1>
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