source: BOOK/final-system/common/util-linux.xml@ 8bb70f57

clfs-1.2 clfs-2.1 clfs-3.0.0-systemd clfs-3.0.0-sysvinit systemd sysvinit
Last change on this file since 8bb70f57 was 6aad380, checked in by Jim Gifford <clfs@…>, 19 years ago

r677@server (orig r675): manuel | 2005-11-10 03:13:57 -0800
Including patches.ent from general.ent

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[3f8be484]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 <segmentedlist>
25 <segtitle>&dependencies;</segtitle>
26
27 <seglistitem>
28 <seg>Bash, Binutils, Coreutils,
29 Diffutils, GCC, Gettext, Glibc, Grep, Make, Ncurses, Sed, and Zlib</seg>
30 </seglistitem>
31 </segmentedlist>
32
33 </sect2>
34
35 <sect2 id="fhs-util-linux" role="installation">
36 <title>FHS compliance notes</title>
37
38 <para>The FHS recommends using the <filename
39 class="directory">/var/lib/hwclock</filename> directory instead of the
40 usual <filename class="directory">/etc</filename> directory as the
41 location for the <filename>adjtime</filename> file. To make the
42 <command>hwclock</command> program FHS-compliant, run the following:</para>
43
44<screen><userinput>sed -i 's@etc/adjtime@var/lib/hwclock/adjtime@g' \
45 hwclock/hwclock.c
46mkdir -p /var/lib/hwclock</userinput></screen>
47
48 </sect2>
49
50 <sect2 role="installation">
51 <title>Installation of Util-linux</title>
52
53 <para os="a">Util-linux fails to compile against newer versions of
54 Linux-Libc-Headers. The following patch properly fixes this issue:</para>
55
56<screen os="b"><userinput>patch -Np1 -i ../&util-linux-cramfs-patch;</userinput></screen>
57
58 <para os="b1">The following patch fixes build issues with GCC 4.x:</para>
59
60<screen os="b2"><userinput>patch -Np1 -i ../&util-linux-gcc4_fixes-patch;</userinput></screen>
61
62 <para os="c">Prepare Util-linux for compilation:</para>
63
64<screen><userinput>./configure</userinput></screen>
65
66 <para os="d">Compile the package:</para>
67
68<screen os="e"><userinput>make HAVE_KILL=yes HAVE_SLN=yes</userinput></screen>
69
70 <variablelist os="f">
71 <title>The meaning of the make parameters:</title>
72
73 <varlistentry os="fa">
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="fb">
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 </variablelist>
91
92 <para os="g">This package does not come with a test suite.</para>
93
94 <para os="h">Install the package and move the <command>logger</command> binary
95 to <filename class="directory">/bin</filename> as it is needed by the
96 LFS-Bootscripts package:</para>
97
98<screen os="i"><userinput>make HAVE_KILL=yes HAVE_SLN=yes install
99mv /usr/bin/logger /bin</userinput></screen>
100
101 </sect2>
102
103 <sect2 id="contents-util-linux" role="content">
104 <title>Contents of Util-linux</title>
105
106 <segmentedlist>
107 <segtitle>Installed programs</segtitle>
108
109 <seglistitem>
110 <seg>agetty, arch, blockdev, cal, cfdisk, chkdupexe, col, colcrt,
111 colrm, column, ctrlaltdel, cytune, ddate, dmesg, elvtune, fdformat,
112 fdisk, fsck.cramfs, fsck.minix, getopt, hexdump, hwclock, ipcrm,
113 ipcs, isosize, line, logger, look, losetup, mcookie, mkfs, mkfs.bfs,
114 mkfs.cramfs, mkfs.minix, mkswap, more, mount, namei, pg, pivot_root,
115 ramsize (link to rdev), raw, rdev, readprofile, rename, renice, rev,
116 rootflags (link to rdev), script, setfdprm, setsid, setterm, sfdisk,
117 swapdev, swapoff (link to swapon), swapon, tunelp, ul, umount, vidmode
118 (link to rdev), whereis, and write</seg>
119 </seglistitem>
120 </segmentedlist>
121
122 <variablelist>
123 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
124 <?dbfo list-presentation="list"?>
125 <?dbhtml list-presentation="table"?>
126
127 <varlistentry id="agetty">
128 <term><command>agetty</command></term>
129 <listitem>
130 <para>Opens a tty port, prompts for a login name,
131 and then invokes the <command>login</command> program</para>
132 <indexterm zone="ch-system-util-linux agetty">
133 <primary sortas="b-agetty">agetty</primary>
134 </indexterm>
135 </listitem>
136 </varlistentry>
137
138 <varlistentry id="arch">
139 <term><command>arch</command></term>
140 <listitem>
141 <para>Reports the machine's architecture</para>
142 <indexterm zone="ch-system-util-linux arch">
143 <primary sortas="b-arch">arch</primary>
144 </indexterm>
145 </listitem>
146 </varlistentry>
147
148 <varlistentry id="blockdev">
149 <term><command>blockdev</command></term>
150 <listitem>
151 <para>Allows users to call block device ioctls from the command
152 line</para>
153 <indexterm zone="ch-system-util-linux blockdev">
154 <primary sortas="b-blockdev">blockdev</primary>
155 </indexterm>
156 </listitem>
157 </varlistentry>
158
159 <varlistentry id="cal">
160 <term><command>cal</command></term>
161 <listitem>
162 <para>Displays a simple calendar</para>
163 <indexterm zone="ch-system-util-linux cal">
164 <primary sortas="b-cal">cal</primary>
165 </indexterm>
166 </listitem>
167 </varlistentry>
168
169 <varlistentry id="cfdisk">
170 <term><command>cfdisk</command></term>
171 <listitem>
172 <para>Manipulates the partition table of the given device</para>
173 <indexterm zone="ch-system-util-linux cfdisk">
174 <primary sortas="b-cfdisk">cfdisk</primary>
175 </indexterm>
176 </listitem>
177 </varlistentry>
178
179 <varlistentry id="chkdupexe">
180 <term><command>chkdupexe</command></term>
181 <listitem>
182 <para>Finds duplicate executables</para>
183 <indexterm zone="ch-system-util-linux chkdupexe">
184 <primary sortas="b-chkdupexe">chkdupexe</primary>
185 </indexterm>
186 </listitem>
187 </varlistentry>
188
189 <varlistentry id="col">
190 <term><command>col</command></term>
191 <listitem>
192 <para>Filters out reverse line feeds</para>
193 <indexterm zone="ch-system-util-linux col">
194 <primary sortas="b-col">col</primary>
195 </indexterm>
196 </listitem>
197 </varlistentry>
198
199 <varlistentry id="colcrt">
200 <term><command>colcrt</command></term>
201 <listitem>
202 <para>Filters <command>nroff</command> output for terminals
203 that lack some capabilities, such as overstriking and half-lines</para>
204 <indexterm zone="ch-system-util-linux colcrt">
205 <primary sortas="b-colcrt">colcrt</primary>
206 </indexterm>
207 </listitem>
208 </varlistentry>
209
210 <varlistentry id="colrm">
211 <term><command>colrm</command></term>
212 <listitem>
213 <para>Filters out the given columns</para>
214 <indexterm zone="ch-system-util-linux colrm">
215 <primary sortas="b-colrm">colrm</primary>
216 </indexterm>
217 </listitem>
218 </varlistentry>
219
220 <varlistentry id="column">
221 <term><command>column</command></term>
222 <listitem>
223 <para>Formats a given file into multiple columns</para>
224 <indexterm zone="ch-system-util-linux column">
225 <primary sortas="b-column">column</primary>
226 </indexterm>
227 </listitem>
228 </varlistentry>
229
230 <varlistentry id="ctrlaltdel">
231 <term><command>ctrlaltdel</command></term>
232 <listitem>
233 <para>Sets the function of the Ctrl+Alt+Del key combination to a
234 hard or a soft reset</para>
235 <indexterm zone="ch-system-util-linux ctrlaltdel">
236 <primary sortas="b-ctrlaltdel">ctrlaltdel</primary>
237 </indexterm>
238 </listitem>
239 </varlistentry>
240
241 <varlistentry id="cytune">
242 <term><command>cytune</command></term>
243 <listitem>
244 <para>Tunes the parameters of the serial line drivers for
245 Cyclades cards</para>
246 <indexterm zone="ch-system-util-linux cytune">
247 <primary sortas="b-cytune">cytune</primary>
248 </indexterm>
249 </listitem>
250 </varlistentry>
251
252 <varlistentry id="ddate">
253 <term><command>ddate</command></term>
254 <listitem>
255 <para>Gives the Discordian date or converts the given Gregorian date
256 to a Discordian one</para>
257 <indexterm zone="ch-system-util-linux ddate">
258 <primary sortas="b-ddate">ddate</primary>
259 </indexterm>
260 </listitem>
261 </varlistentry>
262
263 <varlistentry id="dmesg">
264 <term><command>dmesg</command></term>
265 <listitem>
266 <para>Dumps the kernel boot messages</para>
267 <indexterm zone="ch-system-util-linux dmesg">
268 <primary sortas="b-dmesg">dmesg</primary>
269 </indexterm>
270 </listitem>
271 </varlistentry>
272
273 <varlistentry id="elvtune">
274 <term><command>elvtune</command></term>
275 <listitem>
276 <para>Tunes the performance and interactivity of a block
277 device</para>
278 <indexterm zone="ch-system-util-linux elvtune">
279 <primary sortas="b-elvtune">elvtune</primary>
280 </indexterm>
281 </listitem>
282 </varlistentry>
283
284 <varlistentry id="fdformat">
285 <term><command>fdformat</command></term>
286 <listitem>
287 <para>Low-level formats a floppy disk</para>
288 <indexterm zone="ch-system-util-linux fdformat">
289 <primary sortas="b-fdformat">fdformat</primary>
290 </indexterm>
291 </listitem>
292 </varlistentry>
293
294 <varlistentry id="fdisk">
295 <term><command>fdisk</command></term>
296 <listitem>
297 <para>Manipulates the partition table of the given device</para>
298 <indexterm zone="ch-system-util-linux fdisk">
299 <primary sortas="b-fdisk">fdisk</primary>
300 </indexterm>
301 </listitem>
302 </varlistentry>
303
304 <varlistentry id="fsck.cramfs">
305 <term><command>fsck.cramfs</command></term>
306 <listitem>
307 <para>Performs a consistency check on the Cramfs file system on the
308 given device</para>
309 <indexterm zone="ch-system-util-linux fsck.cramfs">
310 <primary sortas="b-fsck.cramfs">fsck.cramfs</primary>
311 </indexterm>
312 </listitem>
313 </varlistentry>
314
315 <varlistentry id="fsck.minix">
316 <term><command>fsck.minix</command></term>
317 <listitem>
318 <para>Performs a consistency check on the Minix file system on the
319 given device</para>
320 <indexterm zone="ch-system-util-linux fsck.minix">
321 <primary sortas="b-fsck.minix">fsck.minix</primary>
322 </indexterm>
323 </listitem>
324 </varlistentry>
325
326 <varlistentry id="getopt">
327 <term><command>getopt</command></term>
328 <listitem>
329 <para>Parses options in the given command line</para>
330 <indexterm zone="ch-system-util-linux getopt">
331 <primary sortas="b-getopt">getopt</primary>
332 </indexterm>
333 </listitem>
334 </varlistentry>
335
336 <varlistentry id="hexdump">
337 <term><command>hexdump</command></term>
338 <listitem>
339 <para>Dumps the given file in hexadecimal or in another given
340 format</para>
341 <indexterm zone="ch-system-util-linux hexdump">
342 <primary sortas="b-hexdump">hexdump</primary>
343 </indexterm>
344 </listitem>
345 </varlistentry>
346
347 <varlistentry id="hwclock">
348 <term><command>hwclock</command></term>
349 <listitem>
350 <para>Reads or sets the system's hardware clock, also called
351 the Real-Time Clock (RTC) or Basic Input-Output System (BIOS)
352 clock</para>
353 <indexterm zone="ch-system-util-linux hwclock">
354 <primary sortas="b-hwclock">hwclock</primary>
355 </indexterm>
356 </listitem>
357 </varlistentry>
358
359 <varlistentry id="ipcrm">
360 <term><command>ipcrm</command></term>
361 <listitem>
362 <para>Removes the given Inter-Process Communication (IPC) resource</para>
363 <indexterm zone="ch-system-util-linux ipcrm">
364 <primary sortas="b-ipcrm">ipcrm</primary>
365 </indexterm>
366 </listitem>
367 </varlistentry>
368
369 <varlistentry id="ipcs">
370 <term><command>ipcs</command></term>
371 <listitem>
372 <para>Provides IPC status information</para>
373 <indexterm zone="ch-system-util-linux ipcs">
374 <primary sortas="b-ipcs">ipcs</primary>
375 </indexterm>
376 </listitem>
377 </varlistentry>
378
379 <varlistentry id="isosize">
380 <term><command>isosize</command></term>
381 <listitem>
382 <para>Reports the size of an iso9660 file system</para>
383 <indexterm zone="ch-system-util-linux isosize">
384 <primary sortas="b-isosize">isosize</primary>
385 </indexterm>
386 </listitem>
387 </varlistentry>
388
389 <varlistentry id="line">
390 <term><command>line</command></term>
391 <listitem>
392 <para>Copies a single line</para>
393 <indexterm zone="ch-system-util-linux line">
394 <primary sortas="b-line">line</primary>
395 </indexterm>
396 </listitem>
397 </varlistentry>
398
399 <varlistentry id="logger">
400 <term><command>logger</command></term>
401 <listitem>
402 <para>Enters the given message into the system log</para>
403 <indexterm zone="ch-system-util-linux logger">
404 <primary sortas="b-logger">logger</primary>
405 </indexterm>
406 </listitem>
407 </varlistentry>
408
409 <varlistentry id="look">
410 <term><command>look</command></term>
411 <listitem>
412 <para>Displays lines that begin with the given string</para>
413 <indexterm zone="ch-system-util-linux look">
414 <primary sortas="b-look">look</primary>
415 </indexterm>
416 </listitem>
417 </varlistentry>
418
419 <varlistentry id="losetup">
420 <term><command>losetup</command></term>
421 <listitem>
422 <para>Sets up and controls loop devices</para>
423 <indexterm zone="ch-system-util-linux losetup">
424 <primary sortas="b-losetup">losetup</primary>
425 </indexterm>
426 </listitem>
427 </varlistentry>
428
429 <varlistentry id="mcookie">
430 <term><command>mcookie</command></term>
431 <listitem>
432 <para>Generates magic cookies (128-bit random hexadecimal numbers) for
433 <command>xauth</command></para>
434 <indexterm zone="ch-system-util-linux mcookie">
435 <primary sortas="b-mcookie">mcookie</primary>
436 </indexterm>
437 </listitem>
438 </varlistentry>
439
440 <varlistentry id="mkfs">
441 <term><command>mkfs</command></term>
442 <listitem>
443 <para>Builds a file system on a device (usually a hard disk
444 partition)</para>
445 <indexterm zone="ch-system-util-linux mkfs">
446 <primary sortas="b-mkfs">mkfs</primary>
447 </indexterm>
448 </listitem>
449 </varlistentry>
450
451 <varlistentry id="mkfs.bfs">
452 <term><command>mkfs.bfs</command></term>
453 <listitem>
454 <para>Creates a Santa Cruz Operations (SCO) bfs file system</para>
455 <indexterm zone="ch-system-util-linux mkfs.bfs">
456 <primary sortas="b-mkfs.bfs">mkfs.bfs</primary>
457 </indexterm>
458 </listitem>
459 </varlistentry>
460
461 <varlistentry id="mkfs.cramfs">
462 <term><command>mkfs.cramfs</command></term>
463 <listitem>
464 <para>Creates a cramfs file system</para>
465 <indexterm zone="ch-system-util-linux mkfs.cramfs">
466 <primary sortas="b-mkfs.cramfs">mkfs.cramfs</primary>
467 </indexterm>
468 </listitem>
469 </varlistentry>
470
471 <varlistentry id="mkfs.minix">
472 <term><command>mkfs.minix</command></term>
473 <listitem>
474 <para>Creates a Minix file system</para>
475 <indexterm zone="ch-system-util-linux mkfs.minix">
476 <primary sortas="b-mkfs.minix">mkfs.minix</primary>
477 </indexterm>
478 </listitem>
479 </varlistentry>
480
481 <varlistentry id="mkswap">
482 <term><command>mkswap</command></term>
483 <listitem>
484 <para>Initializes the given device or file to be used as a swap
485 area</para>
486 <indexterm zone="ch-system-util-linux mkswap">
487 <primary sortas="b-mkswap">mkswap</primary>
488 </indexterm>
489 </listitem>
490 </varlistentry>
491
492 <varlistentry id="more">
493 <term><command>more</command></term>
494 <listitem>
495 <para>A filter for paging through text one screen at a time</para>
496 <indexterm zone="ch-system-util-linux more">
497 <primary sortas="b-more">more</primary>
498 </indexterm>
499 </listitem>
500 </varlistentry>
501
502 <varlistentry id="mount">
503 <term><command>mount</command></term>
504 <listitem>
505 <para>Attaches the file system on the given device to a specified
506 directory in the file-system tree</para>
507 <indexterm zone="ch-system-util-linux mount">
508 <primary sortas="b-mount">mount</primary>
509 </indexterm>
510 </listitem>
511 </varlistentry>
512
513 <varlistentry id="namei">
514 <term><command>namei</command></term>
515 <listitem>
516 <para>Shows the symbolic links in the given pathnames</para>
517 <indexterm zone="ch-system-util-linux namei">
518 <primary sortas="b-namei">namei</primary>
519 </indexterm>
520 </listitem>
521 </varlistentry>
522
523 <varlistentry id="pg">
524 <term><command>pg</command></term>
525 <listitem>
526 <para>Displays a text file one screen full at a time</para>
527 <indexterm zone="ch-system-util-linux pg">
528 <primary sortas="b-pg">pg</primary>
529 </indexterm>
530 </listitem>
531 </varlistentry>
532
533 <varlistentry id="pivot_root">
534 <term><command>pivot_root</command></term>
535 <listitem>
536 <para>Makes the given file system the new root file system of the
537 current process</para>
538 <indexterm zone="ch-system-util-linux pivot_root">
539 <primary sortas="b-pivot_root">pivot_root</primary>
540 </indexterm>
541 </listitem>
542 </varlistentry>
543
544 <varlistentry id="ramsize">
545 <term><command>ramsize</command></term>
546 <listitem>
547 <para>Sets the size of the RAM disk in a bootable image</para>
548 <indexterm zone="ch-system-util-linux ramsize">
549 <primary sortas="b-ramsize">ramsize</primary>
550 </indexterm>
551 </listitem>
552 </varlistentry>
553
554 <varlistentry id="raw">
555 <term><command>raw</command></term>
556 <listitem>
557 <para>Used to bind a Linux raw character device to a block
558 device</para>
559 <indexterm zone="ch-system-util-linux raw">
560 <primary sortas="b-raw">raw</primary>
561 </indexterm>
562 </listitem>
563 </varlistentry>
564
565 <varlistentry id="rdev">
566 <term><command>rdev</command></term>
567 <listitem>
568 <para>Queries and sets the root device, among other things, in a
569 bootable image</para>
570 <indexterm zone="ch-system-util-linux rdev">
571 <primary sortas="b-rdev">rdev</primary>
572 </indexterm>
573 </listitem>
574 </varlistentry>
575
576 <varlistentry id="readprofile">
577 <term><command>readprofile</command></term>
578 <listitem>
579 <para>Reads kernel profiling information</para>
580 <indexterm zone="ch-system-util-linux readprofile">
581 <primary sortas="b-readprofile">readprofile</primary>
582 </indexterm>
583 </listitem>
584 </varlistentry>
585
586 <varlistentry id="rename">
587 <term><command>rename</command></term>
588 <listitem>
589 <para>Renames the given files, replacing a given string with
590 another</para>
591 <indexterm zone="ch-system-util-linux rename">
592 <primary sortas="b-rename">rename</primary>
593 </indexterm>
594 </listitem>
595 </varlistentry>
596
597 <varlistentry id="renice">
598 <term><command>renice</command></term>
599 <listitem>
600 <para>Alters the priority of running processes</para>
601 <indexterm zone="ch-system-util-linux renice">
602 <primary sortas="b-renice">renice</primary>
603 </indexterm>
604 </listitem>
605 </varlistentry>
606
607 <varlistentry id="rev">
608 <term><command>rev</command></term>
609 <listitem>
610 <para>Reverses the lines of a given file</para>
611 <indexterm zone="ch-system-util-linux rev">
612 <primary sortas="b-rev">rev</primary>
613 </indexterm>
614 </listitem>
615 </varlistentry>
616
617 <varlistentry id="rootflags">
618 <term><command>rootflags</command></term>
619 <listitem>
620 <para>Sets the rootflags in a bootable image</para>
621 <indexterm zone="ch-system-util-linux rootflags">
622 <primary sortas="b-rootflags">rootflags</primary>
623 </indexterm>
624 </listitem>
625 </varlistentry>
626
627 <varlistentry id="script">
628 <term><command>script</command></term>
629 <listitem>
630 <para>Makes a typescript of a terminal session</para>
631 <indexterm zone="ch-system-util-linux script">
632 <primary sortas="b-script">script</primary>
633 </indexterm>
634 </listitem>
635 </varlistentry>
636
637 <varlistentry id="setfdprm">
638 <term><command>setfdprm</command></term>
639 <listitem>
640 <para>Sets user-provided floppy disk parameters</para>
641 <indexterm zone="ch-system-util-linux setfdprm">
642 <primary sortas="b-setfdprm">setfdprm</primary>
643 </indexterm>
644 </listitem>
645 </varlistentry>
646
647 <varlistentry id="setsid">
648 <term><command>setsid</command></term>
649 <listitem>
650 <para>Runs the given program in a new session</para>
651 <indexterm zone="ch-system-util-linux setsid">
652 <primary sortas="b-setsid">setsid</primary>
653 </indexterm>
654 </listitem>
655 </varlistentry>
656
657 <varlistentry id="setterm">
658 <term><command>setterm</command></term>
659 <listitem>
660 <para>Sets terminal attributes</para>
661 <indexterm zone="ch-system-util-linux setterm">
662 <primary sortas="b-setterm">setterm</primary>
663 </indexterm>
664 </listitem>
665 </varlistentry>
666
667 <varlistentry id="sfdisk">
668 <term><command>sfdisk</command></term>
669 <listitem>
670 <para>A disk partition table manipulator</para>
671 <indexterm zone="ch-system-util-linux sfdisk">
672 <primary sortas="b-sfdisk">sfdisk</primary>
673 </indexterm>
674 </listitem>
675 </varlistentry>
676
677 <varlistentry id="swapdev">
678 <term><command>swapdev</command></term>
679 <listitem>
680 <para>Sets the swap device in a bootable image</para>
681 <indexterm zone="ch-system-util-linux swapdev">
682 <primary sortas="b-swapdev">swapdev</primary>
683 </indexterm>
684 </listitem>
685 </varlistentry>
686
687 <varlistentry id="swapoff">
688 <term><command>swapoff</command></term>
689 <listitem>
690 <para>Disables devices and files for paging and swapping</para>
691 <indexterm zone="ch-system-util-linux swapoff">
692 <primary sortas="b-swapoff">swapoff</primary>
693 </indexterm>
694 </listitem>
695 </varlistentry>
696
697 <varlistentry id="swapon">
698 <term><command>swapon</command></term>
699 <listitem>
700 <para>Enables devices and files for paging and swapping and
701 lists the devices and files currently in use</para>
702 <indexterm zone="ch-system-util-linux swapon">
703 <primary sortas="b-swapon">swapon</primary>
704 </indexterm>
705 </listitem>
706 </varlistentry>
707
708 <varlistentry id="tunelp">
709 <term><command>tunelp</command></term>
710 <listitem>
711 <para>Tunes the parameters of the line printer</para>
712 <indexterm zone="ch-system-util-linux tunelp">
713 <primary sortas="b-tunelp">tunelp</primary>
714 </indexterm>
715 </listitem>
716 </varlistentry>
717
718 <varlistentry id="ul">
719 <term><command>ul</command></term>
720 <listitem>
721 <para>A filter for translating underscores into escape sequences
722 indicating underlining for the terminal in use</para>
723 <indexterm zone="ch-system-util-linux ul">
724 <primary sortas="b-ul">ul</primary>
725 </indexterm>
726 </listitem>
727 </varlistentry>
728
729 <varlistentry id="umount">
730 <term><command>umount</command></term>
731 <listitem>
732 <para>Disconnects a file system from the system's file tree</para>
733 <indexterm zone="ch-system-util-linux umount">
734 <primary sortas="b-umount">umount</primary>
735 </indexterm>
736 </listitem>
737 </varlistentry>
738
739 <varlistentry id="vidmode">
740 <term><command>vidmode</command></term>
741 <listitem>
742 <para>Sets the video mode in a bootable image</para>
743 <indexterm zone="ch-system-util-linux vidmode">
744 <primary sortas="b-vidmode">vidmode</primary>
745 </indexterm>
746 </listitem>
747 </varlistentry>
748
749 <varlistentry id="whereis">
750 <term><command>whereis</command></term>
751 <listitem>
752 <para>Reports the location of the binary, source, and man page
753 for the given command</para>
754 <indexterm zone="ch-system-util-linux whereis">
755 <primary sortas="b-whereis">whereis</primary>
756 </indexterm>
757 </listitem>
758 </varlistentry>
759
760 <varlistentry id="write">
761 <term><command>write</command></term>
762 <listitem>
763 <para>Sends a message to the given user <emphasis>if</emphasis> that
764 user has not disabled receipt of such messages</para>
765 <indexterm zone="ch-system-util-linux write">
766 <primary sortas="b-write">write</primary>
767 </indexterm>
768 </listitem>
769 </varlistentry>
770
771 </variablelist>
772
773 </sect2>
774
775</sect1>
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