source: BOOK/final-system/common/util-linux.xml@ 4cc3468

clfs-1.2 clfs-2.1 clfs-3.0.0-systemd clfs-3.0.0-sysvinit systemd sysvinit
Last change on this file since 4cc3468 was 3f8be484, checked in by Jim Gifford <clfs@…>, 19 years ago

r627@server (orig r625): jim | 2005-10-31 12:59:34 -0800
Import of Cross-LFS Book

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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 <!ENTITY % patches-entities SYSTEM "../../patches.ent">
6 %general-entities;
7 %patches-entities;
8]>
9
10<sect1 id="ch-system-util-linux" role="wrap">
11 <?dbhtml filename="util-linux.html"?>
12
13 <title>Util-linux-&util-linux-version;</title>
14
15 <indexterm zone="ch-system-util-linux">
16 <primary sortas="a-Util-linux">Util-linux</primary>
17 </indexterm>
18
19 <sect2 role="package">
20 <title/>
21
22 <para>The Util-linux package contains miscellaneous utility programs.
23 Among them are utilities for handling file systems, consoles, partitions,
24 and messages.</para>
25
26 <segmentedlist>
27 <segtitle>&buildtime;</segtitle>
28 <segtitle>&diskspace;</segtitle>
29
30 <seglistitem>
31 <seg>Not checked yet</seg>
32 <seg>Not checked yet</seg>
33 </seglistitem>
34 </segmentedlist>
35
36 <segmentedlist>
37 <segtitle>&dependencies;</segtitle>
38
39 <seglistitem>
40 <seg>Bash, Binutils, Coreutils,
41 Diffutils, GCC, Gettext, Glibc, Grep, Make, Ncurses, Sed, and Zlib</seg>
42 </seglistitem>
43 </segmentedlist>
44
45 </sect2>
46
47 <sect2 id="fhs-util-linux" role="installation">
48 <title>FHS compliance notes</title>
49
50 <para>The FHS recommends using the <filename
51 class="directory">/var/lib/hwclock</filename> directory instead of the
52 usual <filename class="directory">/etc</filename> directory as the
53 location for the <filename>adjtime</filename> file. To make the
54 <command>hwclock</command> program FHS-compliant, run the following:</para>
55
56<screen><userinput>sed -i 's@etc/adjtime@var/lib/hwclock/adjtime@g' \
57 hwclock/hwclock.c
58mkdir -p /var/lib/hwclock</userinput></screen>
59
60 </sect2>
61
62 <sect2 role="installation">
63 <title>Installation of Util-linux</title>
64
65 <para os="a">Util-linux fails to compile against newer versions of
66 Linux-Libc-Headers. The following patch properly fixes this issue:</para>
67
68<screen os="b"><userinput>patch -Np1 -i ../&util-linux-cramfs-patch;</userinput></screen>
69
70 <para os="b1">The following patch fixes build issues with GCC 4.x:</para>
71
72<screen os="b2"><userinput>patch -Np1 -i ../&util-linux-gcc4_fixes-patch;</userinput></screen>
73
74 <para os="c">Prepare Util-linux for compilation:</para>
75
76<screen><userinput>./configure</userinput></screen>
77
78 <para os="d">Compile the package:</para>
79
80<screen os="e"><userinput>make HAVE_KILL=yes HAVE_SLN=yes</userinput></screen>
81
82 <variablelist os="f">
83 <title>The meaning of the make parameters:</title>
84
85 <varlistentry os="fa">
86 <term><parameter>HAVE_KILL=yes</parameter></term>
87 <listitem>
88 <para>This prevents the <command>kill</command> program (already
89 installed by Procps) from being built and installed again.</para>
90 </listitem>
91 </varlistentry>
92
93 <varlistentry os="fb">
94 <term><parameter>HAVE_SLN=yes</parameter></term>
95 <listitem>
96 <para>This prevents the <command>sln</command> program (a
97 statically linked version of <command>ln</command> already installed
98 by Glibc) from being built and installed again.</para>
99 </listitem>
100 </varlistentry>
101
102 </variablelist>
103
104 <para os="g">This package does not come with a test suite.</para>
105
106 <para os="h">Install the package and move the <command>logger</command> binary
107 to <filename class="directory">/bin</filename> as it is needed by the
108 LFS-Bootscripts package:</para>
109
110<screen os="i"><userinput>make HAVE_KILL=yes HAVE_SLN=yes install
111mv /usr/bin/logger /bin</userinput></screen>
112
113 </sect2>
114
115 <sect2 id="contents-util-linux" role="content">
116 <title>Contents of Util-linux</title>
117
118 <segmentedlist>
119 <segtitle>Installed programs</segtitle>
120
121 <seglistitem>
122 <seg>agetty, arch, blockdev, cal, cfdisk, chkdupexe, col, colcrt,
123 colrm, column, ctrlaltdel, cytune, ddate, dmesg, elvtune, fdformat,
124 fdisk, fsck.cramfs, fsck.minix, getopt, hexdump, hwclock, ipcrm,
125 ipcs, isosize, line, logger, look, losetup, mcookie, mkfs, mkfs.bfs,
126 mkfs.cramfs, mkfs.minix, mkswap, more, mount, namei, pg, pivot_root,
127 ramsize (link to rdev), raw, rdev, readprofile, rename, renice, rev,
128 rootflags (link to rdev), script, setfdprm, setsid, setterm, sfdisk,
129 swapdev, swapoff (link to swapon), swapon, tunelp, ul, umount, vidmode
130 (link to rdev), whereis, and write</seg>
131 </seglistitem>
132 </segmentedlist>
133
134 <variablelist>
135 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
136 <?dbfo list-presentation="list"?>
137 <?dbhtml list-presentation="table"?>
138
139 <varlistentry id="agetty">
140 <term><command>agetty</command></term>
141 <listitem>
142 <para>Opens a tty port, prompts for a login name,
143 and then invokes the <command>login</command> program</para>
144 <indexterm zone="ch-system-util-linux agetty">
145 <primary sortas="b-agetty">agetty</primary>
146 </indexterm>
147 </listitem>
148 </varlistentry>
149
150 <varlistentry id="arch">
151 <term><command>arch</command></term>
152 <listitem>
153 <para>Reports the machine's architecture</para>
154 <indexterm zone="ch-system-util-linux arch">
155 <primary sortas="b-arch">arch</primary>
156 </indexterm>
157 </listitem>
158 </varlistentry>
159
160 <varlistentry id="blockdev">
161 <term><command>blockdev</command></term>
162 <listitem>
163 <para>Allows users to call block device ioctls from the command
164 line</para>
165 <indexterm zone="ch-system-util-linux blockdev">
166 <primary sortas="b-blockdev">blockdev</primary>
167 </indexterm>
168 </listitem>
169 </varlistentry>
170
171 <varlistentry id="cal">
172 <term><command>cal</command></term>
173 <listitem>
174 <para>Displays a simple calendar</para>
175 <indexterm zone="ch-system-util-linux cal">
176 <primary sortas="b-cal">cal</primary>
177 </indexterm>
178 </listitem>
179 </varlistentry>
180
181 <varlistentry id="cfdisk">
182 <term><command>cfdisk</command></term>
183 <listitem>
184 <para>Manipulates the partition table of the given device</para>
185 <indexterm zone="ch-system-util-linux cfdisk">
186 <primary sortas="b-cfdisk">cfdisk</primary>
187 </indexterm>
188 </listitem>
189 </varlistentry>
190
191 <varlistentry id="chkdupexe">
192 <term><command>chkdupexe</command></term>
193 <listitem>
194 <para>Finds duplicate executables</para>
195 <indexterm zone="ch-system-util-linux chkdupexe">
196 <primary sortas="b-chkdupexe">chkdupexe</primary>
197 </indexterm>
198 </listitem>
199 </varlistentry>
200
201 <varlistentry id="col">
202 <term><command>col</command></term>
203 <listitem>
204 <para>Filters out reverse line feeds</para>
205 <indexterm zone="ch-system-util-linux col">
206 <primary sortas="b-col">col</primary>
207 </indexterm>
208 </listitem>
209 </varlistentry>
210
211 <varlistentry id="colcrt">
212 <term><command>colcrt</command></term>
213 <listitem>
214 <para>Filters <command>nroff</command> output for terminals
215 that lack some capabilities, such as overstriking and half-lines</para>
216 <indexterm zone="ch-system-util-linux colcrt">
217 <primary sortas="b-colcrt">colcrt</primary>
218 </indexterm>
219 </listitem>
220 </varlistentry>
221
222 <varlistentry id="colrm">
223 <term><command>colrm</command></term>
224 <listitem>
225 <para>Filters out the given columns</para>
226 <indexterm zone="ch-system-util-linux colrm">
227 <primary sortas="b-colrm">colrm</primary>
228 </indexterm>
229 </listitem>
230 </varlistentry>
231
232 <varlistentry id="column">
233 <term><command>column</command></term>
234 <listitem>
235 <para>Formats a given file into multiple columns</para>
236 <indexterm zone="ch-system-util-linux column">
237 <primary sortas="b-column">column</primary>
238 </indexterm>
239 </listitem>
240 </varlistentry>
241
242 <varlistentry id="ctrlaltdel">
243 <term><command>ctrlaltdel</command></term>
244 <listitem>
245 <para>Sets the function of the Ctrl+Alt+Del key combination to a
246 hard or a soft reset</para>
247 <indexterm zone="ch-system-util-linux ctrlaltdel">
248 <primary sortas="b-ctrlaltdel">ctrlaltdel</primary>
249 </indexterm>
250 </listitem>
251 </varlistentry>
252
253 <varlistentry id="cytune">
254 <term><command>cytune</command></term>
255 <listitem>
256 <para>Tunes the parameters of the serial line drivers for
257 Cyclades cards</para>
258 <indexterm zone="ch-system-util-linux cytune">
259 <primary sortas="b-cytune">cytune</primary>
260 </indexterm>
261 </listitem>
262 </varlistentry>
263
264 <varlistentry id="ddate">
265 <term><command>ddate</command></term>
266 <listitem>
267 <para>Gives the Discordian date or converts the given Gregorian date
268 to a Discordian one</para>
269 <indexterm zone="ch-system-util-linux ddate">
270 <primary sortas="b-ddate">ddate</primary>
271 </indexterm>
272 </listitem>
273 </varlistentry>
274
275 <varlistentry id="dmesg">
276 <term><command>dmesg</command></term>
277 <listitem>
278 <para>Dumps the kernel boot messages</para>
279 <indexterm zone="ch-system-util-linux dmesg">
280 <primary sortas="b-dmesg">dmesg</primary>
281 </indexterm>
282 </listitem>
283 </varlistentry>
284
285 <varlistentry id="elvtune">
286 <term><command>elvtune</command></term>
287 <listitem>
288 <para>Tunes the performance and interactivity of a block
289 device</para>
290 <indexterm zone="ch-system-util-linux elvtune">
291 <primary sortas="b-elvtune">elvtune</primary>
292 </indexterm>
293 </listitem>
294 </varlistentry>
295
296 <varlistentry id="fdformat">
297 <term><command>fdformat</command></term>
298 <listitem>
299 <para>Low-level formats a floppy disk</para>
300 <indexterm zone="ch-system-util-linux fdformat">
301 <primary sortas="b-fdformat">fdformat</primary>
302 </indexterm>
303 </listitem>
304 </varlistentry>
305
306 <varlistentry id="fdisk">
307 <term><command>fdisk</command></term>
308 <listitem>
309 <para>Manipulates the partition table of the given device</para>
310 <indexterm zone="ch-system-util-linux fdisk">
311 <primary sortas="b-fdisk">fdisk</primary>
312 </indexterm>
313 </listitem>
314 </varlistentry>
315
316 <varlistentry id="fsck.cramfs">
317 <term><command>fsck.cramfs</command></term>
318 <listitem>
319 <para>Performs a consistency check on the Cramfs file system on the
320 given device</para>
321 <indexterm zone="ch-system-util-linux fsck.cramfs">
322 <primary sortas="b-fsck.cramfs">fsck.cramfs</primary>
323 </indexterm>
324 </listitem>
325 </varlistentry>
326
327 <varlistentry id="fsck.minix">
328 <term><command>fsck.minix</command></term>
329 <listitem>
330 <para>Performs a consistency check on the Minix file system on the
331 given device</para>
332 <indexterm zone="ch-system-util-linux fsck.minix">
333 <primary sortas="b-fsck.minix">fsck.minix</primary>
334 </indexterm>
335 </listitem>
336 </varlistentry>
337
338 <varlistentry id="getopt">
339 <term><command>getopt</command></term>
340 <listitem>
341 <para>Parses options in the given command line</para>
342 <indexterm zone="ch-system-util-linux getopt">
343 <primary sortas="b-getopt">getopt</primary>
344 </indexterm>
345 </listitem>
346 </varlistentry>
347
348 <varlistentry id="hexdump">
349 <term><command>hexdump</command></term>
350 <listitem>
351 <para>Dumps the given file in hexadecimal or in another given
352 format</para>
353 <indexterm zone="ch-system-util-linux hexdump">
354 <primary sortas="b-hexdump">hexdump</primary>
355 </indexterm>
356 </listitem>
357 </varlistentry>
358
359 <varlistentry id="hwclock">
360 <term><command>hwclock</command></term>
361 <listitem>
362 <para>Reads or sets the system's hardware clock, also called
363 the Real-Time Clock (RTC) or Basic Input-Output System (BIOS)
364 clock</para>
365 <indexterm zone="ch-system-util-linux hwclock">
366 <primary sortas="b-hwclock">hwclock</primary>
367 </indexterm>
368 </listitem>
369 </varlistentry>
370
371 <varlistentry id="ipcrm">
372 <term><command>ipcrm</command></term>
373 <listitem>
374 <para>Removes the given Inter-Process Communication (IPC) resource</para>
375 <indexterm zone="ch-system-util-linux ipcrm">
376 <primary sortas="b-ipcrm">ipcrm</primary>
377 </indexterm>
378 </listitem>
379 </varlistentry>
380
381 <varlistentry id="ipcs">
382 <term><command>ipcs</command></term>
383 <listitem>
384 <para>Provides IPC status information</para>
385 <indexterm zone="ch-system-util-linux ipcs">
386 <primary sortas="b-ipcs">ipcs</primary>
387 </indexterm>
388 </listitem>
389 </varlistentry>
390
391 <varlistentry id="isosize">
392 <term><command>isosize</command></term>
393 <listitem>
394 <para>Reports the size of an iso9660 file system</para>
395 <indexterm zone="ch-system-util-linux isosize">
396 <primary sortas="b-isosize">isosize</primary>
397 </indexterm>
398 </listitem>
399 </varlistentry>
400
401 <varlistentry id="line">
402 <term><command>line</command></term>
403 <listitem>
404 <para>Copies a single line</para>
405 <indexterm zone="ch-system-util-linux line">
406 <primary sortas="b-line">line</primary>
407 </indexterm>
408 </listitem>
409 </varlistentry>
410
411 <varlistentry id="logger">
412 <term><command>logger</command></term>
413 <listitem>
414 <para>Enters the given message into the system log</para>
415 <indexterm zone="ch-system-util-linux logger">
416 <primary sortas="b-logger">logger</primary>
417 </indexterm>
418 </listitem>
419 </varlistentry>
420
421 <varlistentry id="look">
422 <term><command>look</command></term>
423 <listitem>
424 <para>Displays lines that begin with the given string</para>
425 <indexterm zone="ch-system-util-linux look">
426 <primary sortas="b-look">look</primary>
427 </indexterm>
428 </listitem>
429 </varlistentry>
430
431 <varlistentry id="losetup">
432 <term><command>losetup</command></term>
433 <listitem>
434 <para>Sets up and controls loop devices</para>
435 <indexterm zone="ch-system-util-linux losetup">
436 <primary sortas="b-losetup">losetup</primary>
437 </indexterm>
438 </listitem>
439 </varlistentry>
440
441 <varlistentry id="mcookie">
442 <term><command>mcookie</command></term>
443 <listitem>
444 <para>Generates magic cookies (128-bit random hexadecimal numbers) for
445 <command>xauth</command></para>
446 <indexterm zone="ch-system-util-linux mcookie">
447 <primary sortas="b-mcookie">mcookie</primary>
448 </indexterm>
449 </listitem>
450 </varlistentry>
451
452 <varlistentry id="mkfs">
453 <term><command>mkfs</command></term>
454 <listitem>
455 <para>Builds a file system on a device (usually a hard disk
456 partition)</para>
457 <indexterm zone="ch-system-util-linux mkfs">
458 <primary sortas="b-mkfs">mkfs</primary>
459 </indexterm>
460 </listitem>
461 </varlistentry>
462
463 <varlistentry id="mkfs.bfs">
464 <term><command>mkfs.bfs</command></term>
465 <listitem>
466 <para>Creates a Santa Cruz Operations (SCO) bfs file system</para>
467 <indexterm zone="ch-system-util-linux mkfs.bfs">
468 <primary sortas="b-mkfs.bfs">mkfs.bfs</primary>
469 </indexterm>
470 </listitem>
471 </varlistentry>
472
473 <varlistentry id="mkfs.cramfs">
474 <term><command>mkfs.cramfs</command></term>
475 <listitem>
476 <para>Creates a cramfs file system</para>
477 <indexterm zone="ch-system-util-linux mkfs.cramfs">
478 <primary sortas="b-mkfs.cramfs">mkfs.cramfs</primary>
479 </indexterm>
480 </listitem>
481 </varlistentry>
482
483 <varlistentry id="mkfs.minix">
484 <term><command>mkfs.minix</command></term>
485 <listitem>
486 <para>Creates a Minix file system</para>
487 <indexterm zone="ch-system-util-linux mkfs.minix">
488 <primary sortas="b-mkfs.minix">mkfs.minix</primary>
489 </indexterm>
490 </listitem>
491 </varlistentry>
492
493 <varlistentry id="mkswap">
494 <term><command>mkswap</command></term>
495 <listitem>
496 <para>Initializes the given device or file to be used as a swap
497 area</para>
498 <indexterm zone="ch-system-util-linux mkswap">
499 <primary sortas="b-mkswap">mkswap</primary>
500 </indexterm>
501 </listitem>
502 </varlistentry>
503
504 <varlistentry id="more">
505 <term><command>more</command></term>
506 <listitem>
507 <para>A filter for paging through text one screen at a time</para>
508 <indexterm zone="ch-system-util-linux more">
509 <primary sortas="b-more">more</primary>
510 </indexterm>
511 </listitem>
512 </varlistentry>
513
514 <varlistentry id="mount">
515 <term><command>mount</command></term>
516 <listitem>
517 <para>Attaches the file system on the given device to a specified
518 directory in the file-system tree</para>
519 <indexterm zone="ch-system-util-linux mount">
520 <primary sortas="b-mount">mount</primary>
521 </indexterm>
522 </listitem>
523 </varlistentry>
524
525 <varlistentry id="namei">
526 <term><command>namei</command></term>
527 <listitem>
528 <para>Shows the symbolic links in the given pathnames</para>
529 <indexterm zone="ch-system-util-linux namei">
530 <primary sortas="b-namei">namei</primary>
531 </indexterm>
532 </listitem>
533 </varlistentry>
534
535 <varlistentry id="pg">
536 <term><command>pg</command></term>
537 <listitem>
538 <para>Displays a text file one screen full at a time</para>
539 <indexterm zone="ch-system-util-linux pg">
540 <primary sortas="b-pg">pg</primary>
541 </indexterm>
542 </listitem>
543 </varlistentry>
544
545 <varlistentry id="pivot_root">
546 <term><command>pivot_root</command></term>
547 <listitem>
548 <para>Makes the given file system the new root file system of the
549 current process</para>
550 <indexterm zone="ch-system-util-linux pivot_root">
551 <primary sortas="b-pivot_root">pivot_root</primary>
552 </indexterm>
553 </listitem>
554 </varlistentry>
555
556 <varlistentry id="ramsize">
557 <term><command>ramsize</command></term>
558 <listitem>
559 <para>Sets the size of the RAM disk in a bootable image</para>
560 <indexterm zone="ch-system-util-linux ramsize">
561 <primary sortas="b-ramsize">ramsize</primary>
562 </indexterm>
563 </listitem>
564 </varlistentry>
565
566 <varlistentry id="raw">
567 <term><command>raw</command></term>
568 <listitem>
569 <para>Used to bind a Linux raw character device to a block
570 device</para>
571 <indexterm zone="ch-system-util-linux raw">
572 <primary sortas="b-raw">raw</primary>
573 </indexterm>
574 </listitem>
575 </varlistentry>
576
577 <varlistentry id="rdev">
578 <term><command>rdev</command></term>
579 <listitem>
580 <para>Queries and sets the root device, among other things, in a
581 bootable image</para>
582 <indexterm zone="ch-system-util-linux rdev">
583 <primary sortas="b-rdev">rdev</primary>
584 </indexterm>
585 </listitem>
586 </varlistentry>
587
588 <varlistentry id="readprofile">
589 <term><command>readprofile</command></term>
590 <listitem>
591 <para>Reads kernel profiling information</para>
592 <indexterm zone="ch-system-util-linux readprofile">
593 <primary sortas="b-readprofile">readprofile</primary>
594 </indexterm>
595 </listitem>
596 </varlistentry>
597
598 <varlistentry id="rename">
599 <term><command>rename</command></term>
600 <listitem>
601 <para>Renames the given files, replacing a given string with
602 another</para>
603 <indexterm zone="ch-system-util-linux rename">
604 <primary sortas="b-rename">rename</primary>
605 </indexterm>
606 </listitem>
607 </varlistentry>
608
609 <varlistentry id="renice">
610 <term><command>renice</command></term>
611 <listitem>
612 <para>Alters the priority of running processes</para>
613 <indexterm zone="ch-system-util-linux renice">
614 <primary sortas="b-renice">renice</primary>
615 </indexterm>
616 </listitem>
617 </varlistentry>
618
619 <varlistentry id="rev">
620 <term><command>rev</command></term>
621 <listitem>
622 <para>Reverses the lines of a given file</para>
623 <indexterm zone="ch-system-util-linux rev">
624 <primary sortas="b-rev">rev</primary>
625 </indexterm>
626 </listitem>
627 </varlistentry>
628
629 <varlistentry id="rootflags">
630 <term><command>rootflags</command></term>
631 <listitem>
632 <para>Sets the rootflags in a bootable image</para>
633 <indexterm zone="ch-system-util-linux rootflags">
634 <primary sortas="b-rootflags">rootflags</primary>
635 </indexterm>
636 </listitem>
637 </varlistentry>
638
639 <varlistentry id="script">
640 <term><command>script</command></term>
641 <listitem>
642 <para>Makes a typescript of a terminal session</para>
643 <indexterm zone="ch-system-util-linux script">
644 <primary sortas="b-script">script</primary>
645 </indexterm>
646 </listitem>
647 </varlistentry>
648
649 <varlistentry id="setfdprm">
650 <term><command>setfdprm</command></term>
651 <listitem>
652 <para>Sets user-provided floppy disk parameters</para>
653 <indexterm zone="ch-system-util-linux setfdprm">
654 <primary sortas="b-setfdprm">setfdprm</primary>
655 </indexterm>
656 </listitem>
657 </varlistentry>
658
659 <varlistentry id="setsid">
660 <term><command>setsid</command></term>
661 <listitem>
662 <para>Runs the given program in a new session</para>
663 <indexterm zone="ch-system-util-linux setsid">
664 <primary sortas="b-setsid">setsid</primary>
665 </indexterm>
666 </listitem>
667 </varlistentry>
668
669 <varlistentry id="setterm">
670 <term><command>setterm</command></term>
671 <listitem>
672 <para>Sets terminal attributes</para>
673 <indexterm zone="ch-system-util-linux setterm">
674 <primary sortas="b-setterm">setterm</primary>
675 </indexterm>
676 </listitem>
677 </varlistentry>
678
679 <varlistentry id="sfdisk">
680 <term><command>sfdisk</command></term>
681 <listitem>
682 <para>A disk partition table manipulator</para>
683 <indexterm zone="ch-system-util-linux sfdisk">
684 <primary sortas="b-sfdisk">sfdisk</primary>
685 </indexterm>
686 </listitem>
687 </varlistentry>
688
689 <varlistentry id="swapdev">
690 <term><command>swapdev</command></term>
691 <listitem>
692 <para>Sets the swap device in a bootable image</para>
693 <indexterm zone="ch-system-util-linux swapdev">
694 <primary sortas="b-swapdev">swapdev</primary>
695 </indexterm>
696 </listitem>
697 </varlistentry>
698
699 <varlistentry id="swapoff">
700 <term><command>swapoff</command></term>
701 <listitem>
702 <para>Disables devices and files for paging and swapping</para>
703 <indexterm zone="ch-system-util-linux swapoff">
704 <primary sortas="b-swapoff">swapoff</primary>
705 </indexterm>
706 </listitem>
707 </varlistentry>
708
709 <varlistentry id="swapon">
710 <term><command>swapon</command></term>
711 <listitem>
712 <para>Enables devices and files for paging and swapping and
713 lists the devices and files currently in use</para>
714 <indexterm zone="ch-system-util-linux swapon">
715 <primary sortas="b-swapon">swapon</primary>
716 </indexterm>
717 </listitem>
718 </varlistentry>
719
720 <varlistentry id="tunelp">
721 <term><command>tunelp</command></term>
722 <listitem>
723 <para>Tunes the parameters of the line printer</para>
724 <indexterm zone="ch-system-util-linux tunelp">
725 <primary sortas="b-tunelp">tunelp</primary>
726 </indexterm>
727 </listitem>
728 </varlistentry>
729
730 <varlistentry id="ul">
731 <term><command>ul</command></term>
732 <listitem>
733 <para>A filter for translating underscores into escape sequences
734 indicating underlining for the terminal in use</para>
735 <indexterm zone="ch-system-util-linux ul">
736 <primary sortas="b-ul">ul</primary>
737 </indexterm>
738 </listitem>
739 </varlistentry>
740
741 <varlistentry id="umount">
742 <term><command>umount</command></term>
743 <listitem>
744 <para>Disconnects a file system from the system's file tree</para>
745 <indexterm zone="ch-system-util-linux umount">
746 <primary sortas="b-umount">umount</primary>
747 </indexterm>
748 </listitem>
749 </varlistentry>
750
751 <varlistentry id="vidmode">
752 <term><command>vidmode</command></term>
753 <listitem>
754 <para>Sets the video mode in a bootable image</para>
755 <indexterm zone="ch-system-util-linux vidmode">
756 <primary sortas="b-vidmode">vidmode</primary>
757 </indexterm>
758 </listitem>
759 </varlistentry>
760
761 <varlistentry id="whereis">
762 <term><command>whereis</command></term>
763 <listitem>
764 <para>Reports the location of the binary, source, and man page
765 for the given command</para>
766 <indexterm zone="ch-system-util-linux whereis">
767 <primary sortas="b-whereis">whereis</primary>
768 </indexterm>
769 </listitem>
770 </varlistentry>
771
772 <varlistentry id="write">
773 <term><command>write</command></term>
774 <listitem>
775 <para>Sends a message to the given user <emphasis>if</emphasis> that
776 user has not disabled receipt of such messages</para>
777 <indexterm zone="ch-system-util-linux write">
778 <primary sortas="b-write">write</primary>
779 </indexterm>
780 </listitem>
781 </varlistentry>
782
783 </variablelist>
784
785 </sect2>
786
787</sect1>
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