source: BOOK/final-system/common/util-linux.xml@ 35fa6a8

clfs-1.2 clfs-2.1 clfs-3.0.0-systemd clfs-3.0.0-sysvinit systemd sysvinit
Last change on this file since 35fa6a8 was e2de6f8, checked in by Jim Gifford <clfs@…>, 19 years ago

r2407@server (orig r1201): chris | 2006-02-23 18:10:00 -0800
Minor corrections to util-linux instructions

  • Property mode set to 100644
File size: 26.4 KB
Line 
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, Diffutils, E2fsprogs, GCC,
29 Gettext, Glibc, Grep, Make, Ncurses, Patch,
30 Sed, and Zlib</seg>
31 </seglistitem>
32 </segmentedlist>
33
34 </sect2>
35
36 <sect2 id="fhs-util-linux" role="installation">
37 <title>FHS compliance notes</title>
38
39 <para>The FHS recommends using the <filename
40 class="directory">/var/lib/hwclock</filename> directory instead of the
41 usual <filename class="directory">/etc</filename> directory as the
42 location for the <filename>adjtime</filename> file. To make the
43 <command>hwclock</command> program FHS-compliant, run the following:</para>
44
45<screen><userinput>sed -i 's@etc/adjtime@var/lib/hwclock/adjtime@g' \
46 hwclock/hwclock.c
47mkdir -p /var/lib/hwclock</userinput></screen>
48
49 </sect2>
50
51 <sect2 role="installation">
52 <title>Installation of Util-linux</title>
53
54 <para os="p1">Util-linux fails to compile against newer versions of
55 Linux-Libc-Headers. The following patch properly fixes this issue:</para>
56
57<screen os="p2"><userinput>patch -Np1 -i ../&util-linux-cramfs-patch;</userinput></screen>
58
59 <para os="p3">The following patch fixes build issues with GCC &gcc-version;:</para>
60
61<screen os="p4"><userinput>patch -Np1 -i ../&util-linux-gcc4_fixes-patch;</userinput></screen>
62
63 <para os="a">Prepare Util-linux for compilation:</para>
64
65<screen os="b"><userinput>./configure</userinput></screen>
66
67 <para os="c">Compile the package:</para>
68
69<screen os="d"><userinput>make HAVE_KILL=yes HAVE_SLN=yes</userinput></screen>
70
71 <variablelist os="e">
72 <title>The meaning of the make parameters:</title>
73
74 <varlistentry os="e1">
75 <term><parameter>HAVE_KILL=yes</parameter></term>
76 <listitem>
77 <para>This prevents the <command>kill</command> program (already
78 installed by Procps) from being built and installed again.</para>
79 </listitem>
80 </varlistentry>
81
82 <varlistentry os="e2">
83 <term><parameter>HAVE_SLN=yes</parameter></term>
84 <listitem>
85 <para>This prevents the <command>sln</command> program (a
86 statically linked version of <command>ln</command> already installed
87 by Glibc) from being built and installed again.</para>
88 </listitem>
89 </varlistentry>
90
91 </variablelist>
92
93 <para os="f">This package does not come with a test suite.</para>
94
95 <para os="g">Install the package and move the <command>logger</command> binary
96 to <filename class="directory">/bin</filename> as it is needed by the
97 LFS-Bootscripts package:</para>
98
99<screen os="h"><userinput>make HAVE_KILL=yes HAVE_SLN=yes install
100mv -v /usr/bin/logger /bin</userinput></screen>
101
102 </sect2>
103
104 <sect2 id="contents-util-linux" role="content">
105 <title>Contents of Util-linux</title>
106
107 <segmentedlist>
108 <segtitle>Installed programs</segtitle>
109
110 <seglistitem>
111 <seg>agetty, arch, blockdev, cal, cfdisk, chkdupexe, col, colcrt,
112 colrm, column, ctrlaltdel, cytune, ddate, dmesg, elvtune, fdformat,
113 fdisk, fsck.cramfs, fsck.minix, getopt, hexdump, hwclock, ipcrm,
114 ipcs, isosize, line, logger, look, losetup, mcookie, mkfs, mkfs.bfs,
115 mkfs.cramfs, mkfs.minix, mkswap, more, mount, namei, pg, pivot_root,
116 ramsize (link to rdev), raw, rdev, readprofile, rename, renice, rev,
117 rootflags (link to rdev), script, setfdprm, setsid, setterm, sfdisk,
118 swapdev, swapoff (link to swapon), swapon, tunelp, ul, umount, vidmode
119 (link to rdev), whereis, and write</seg>
120 </seglistitem>
121 </segmentedlist>
122
123 <variablelist>
124 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
125 <?dbfo list-presentation="list"?>
126 <?dbhtml list-presentation="table"?>
127
128 <varlistentry id="agetty">
129 <term><command>agetty</command></term>
130 <listitem>
131 <para>Opens a tty port, prompts for a login name,
132 and then invokes the <command>login</command> program</para>
133 <indexterm zone="ch-system-util-linux agetty">
134 <primary sortas="b-agetty">agetty</primary>
135 </indexterm>
136 </listitem>
137 </varlistentry>
138
139 <varlistentry id="arch">
140 <term><command>arch</command></term>
141 <listitem>
142 <para>Reports the machine's architecture</para>
143 <indexterm zone="ch-system-util-linux arch">
144 <primary sortas="b-arch">arch</primary>
145 </indexterm>
146 </listitem>
147 </varlistentry>
148
149 <varlistentry id="blockdev">
150 <term><command>blockdev</command></term>
151 <listitem>
152 <para>Allows users to call block device ioctls from the command
153 line</para>
154 <indexterm zone="ch-system-util-linux blockdev">
155 <primary sortas="b-blockdev">blockdev</primary>
156 </indexterm>
157 </listitem>
158 </varlistentry>
159
160 <varlistentry id="cal">
161 <term><command>cal</command></term>
162 <listitem>
163 <para>Displays a simple calendar</para>
164 <indexterm zone="ch-system-util-linux cal">
165 <primary sortas="b-cal">cal</primary>
166 </indexterm>
167 </listitem>
168 </varlistentry>
169
170 <varlistentry id="cfdisk">
171 <term><command>cfdisk</command></term>
172 <listitem>
173 <para>Manipulates the partition table of the given device</para>
174 <indexterm zone="ch-system-util-linux cfdisk">
175 <primary sortas="b-cfdisk">cfdisk</primary>
176 </indexterm>
177 </listitem>
178 </varlistentry>
179
180 <varlistentry id="chkdupexe">
181 <term><command>chkdupexe</command></term>
182 <listitem>
183 <para>Finds duplicate executables</para>
184 <indexterm zone="ch-system-util-linux chkdupexe">
185 <primary sortas="b-chkdupexe">chkdupexe</primary>
186 </indexterm>
187 </listitem>
188 </varlistentry>
189
190 <varlistentry id="col">
191 <term><command>col</command></term>
192 <listitem>
193 <para>Filters out reverse line feeds</para>
194 <indexterm zone="ch-system-util-linux col">
195 <primary sortas="b-col">col</primary>
196 </indexterm>
197 </listitem>
198 </varlistentry>
199
200 <varlistentry id="colcrt">
201 <term><command>colcrt</command></term>
202 <listitem>
203 <para>Filters <command>nroff</command> output for terminals
204 that lack some capabilities, such as overstriking and half-lines</para>
205 <indexterm zone="ch-system-util-linux colcrt">
206 <primary sortas="b-colcrt">colcrt</primary>
207 </indexterm>
208 </listitem>
209 </varlistentry>
210
211 <varlistentry id="colrm">
212 <term><command>colrm</command></term>
213 <listitem>
214 <para>Filters out the given columns</para>
215 <indexterm zone="ch-system-util-linux colrm">
216 <primary sortas="b-colrm">colrm</primary>
217 </indexterm>
218 </listitem>
219 </varlistentry>
220
221 <varlistentry id="column">
222 <term><command>column</command></term>
223 <listitem>
224 <para>Formats a given file into multiple columns</para>
225 <indexterm zone="ch-system-util-linux column">
226 <primary sortas="b-column">column</primary>
227 </indexterm>
228 </listitem>
229 </varlistentry>
230
231 <varlistentry id="ctrlaltdel">
232 <term><command>ctrlaltdel</command></term>
233 <listitem>
234 <para>Sets the function of the Ctrl+Alt+Del key combination to a
235 hard or a soft reset</para>
236 <indexterm zone="ch-system-util-linux ctrlaltdel">
237 <primary sortas="b-ctrlaltdel">ctrlaltdel</primary>
238 </indexterm>
239 </listitem>
240 </varlistentry>
241
242 <varlistentry id="cytune">
243 <term><command>cytune</command></term>
244 <listitem>
245 <para>Tunes the parameters of the serial line drivers for
246 Cyclades cards</para>
247 <indexterm zone="ch-system-util-linux cytune">
248 <primary sortas="b-cytune">cytune</primary>
249 </indexterm>
250 </listitem>
251 </varlistentry>
252
253 <varlistentry id="ddate">
254 <term><command>ddate</command></term>
255 <listitem>
256 <para>Gives the Discordian date or converts the given Gregorian date
257 to a Discordian one</para>
258 <indexterm zone="ch-system-util-linux ddate">
259 <primary sortas="b-ddate">ddate</primary>
260 </indexterm>
261 </listitem>
262 </varlistentry>
263
264 <varlistentry id="dmesg">
265 <term><command>dmesg</command></term>
266 <listitem>
267 <para>Dumps the kernel boot messages</para>
268 <indexterm zone="ch-system-util-linux dmesg">
269 <primary sortas="b-dmesg">dmesg</primary>
270 </indexterm>
271 </listitem>
272 </varlistentry>
273
274 <varlistentry id="elvtune">
275 <term><command>elvtune</command></term>
276 <listitem>
277 <para>Tunes the performance and interactivity of a block
278 device</para>
279 <indexterm zone="ch-system-util-linux elvtune">
280 <primary sortas="b-elvtune">elvtune</primary>
281 </indexterm>
282 </listitem>
283 </varlistentry>
284
285 <varlistentry id="fdformat">
286 <term><command>fdformat</command></term>
287 <listitem>
288 <para>Low-level formats a floppy disk</para>
289 <indexterm zone="ch-system-util-linux fdformat">
290 <primary sortas="b-fdformat">fdformat</primary>
291 </indexterm>
292 </listitem>
293 </varlistentry>
294
295 <varlistentry id="fdisk">
296 <term><command>fdisk</command></term>
297 <listitem>
298 <para>Manipulates the partition table of the given device</para>
299 <indexterm zone="ch-system-util-linux fdisk">
300 <primary sortas="b-fdisk">fdisk</primary>
301 </indexterm>
302 </listitem>
303 </varlistentry>
304
305 <varlistentry id="fsck.cramfs">
306 <term><command>fsck.cramfs</command></term>
307 <listitem>
308 <para>Performs a consistency check on the Cramfs file system on the
309 given device</para>
310 <indexterm zone="ch-system-util-linux fsck.cramfs">
311 <primary sortas="b-fsck.cramfs">fsck.cramfs</primary>
312 </indexterm>
313 </listitem>
314 </varlistentry>
315
316 <varlistentry id="fsck.minix">
317 <term><command>fsck.minix</command></term>
318 <listitem>
319 <para>Performs a consistency check on the Minix file system on the
320 given device</para>
321 <indexterm zone="ch-system-util-linux fsck.minix">
322 <primary sortas="b-fsck.minix">fsck.minix</primary>
323 </indexterm>
324 </listitem>
325 </varlistentry>
326
327 <varlistentry id="getopt">
328 <term><command>getopt</command></term>
329 <listitem>
330 <para>Parses options in the given command line</para>
331 <indexterm zone="ch-system-util-linux getopt">
332 <primary sortas="b-getopt">getopt</primary>
333 </indexterm>
334 </listitem>
335 </varlistentry>
336
337 <varlistentry id="hexdump">
338 <term><command>hexdump</command></term>
339 <listitem>
340 <para>Dumps the given file in hexadecimal or in another given
341 format</para>
342 <indexterm zone="ch-system-util-linux hexdump">
343 <primary sortas="b-hexdump">hexdump</primary>
344 </indexterm>
345 </listitem>
346 </varlistentry>
347
348 <varlistentry id="hwclock">
349 <term><command>hwclock</command></term>
350 <listitem>
351 <para>Reads or sets the system's hardware clock, also called
352 the Real-Time Clock (RTC) or Basic Input-Output System (BIOS)
353 clock</para>
354 <indexterm zone="ch-system-util-linux hwclock">
355 <primary sortas="b-hwclock">hwclock</primary>
356 </indexterm>
357 </listitem>
358 </varlistentry>
359
360 <varlistentry id="ipcrm">
361 <term><command>ipcrm</command></term>
362 <listitem>
363 <para>Removes the given Inter-Process Communication (IPC) resource</para>
364 <indexterm zone="ch-system-util-linux ipcrm">
365 <primary sortas="b-ipcrm">ipcrm</primary>
366 </indexterm>
367 </listitem>
368 </varlistentry>
369
370 <varlistentry id="ipcs">
371 <term><command>ipcs</command></term>
372 <listitem>
373 <para>Provides IPC status information</para>
374 <indexterm zone="ch-system-util-linux ipcs">
375 <primary sortas="b-ipcs">ipcs</primary>
376 </indexterm>
377 </listitem>
378 </varlistentry>
379
380 <varlistentry id="isosize">
381 <term><command>isosize</command></term>
382 <listitem>
383 <para>Reports the size of an iso9660 file system</para>
384 <indexterm zone="ch-system-util-linux isosize">
385 <primary sortas="b-isosize">isosize</primary>
386 </indexterm>
387 </listitem>
388 </varlistentry>
389
390 <varlistentry id="line">
391 <term><command>line</command></term>
392 <listitem>
393 <para>Copies a single line</para>
394 <indexterm zone="ch-system-util-linux line">
395 <primary sortas="b-line">line</primary>
396 </indexterm>
397 </listitem>
398 </varlistentry>
399
400 <varlistentry id="logger">
401 <term><command>logger</command></term>
402 <listitem>
403 <para>Enters the given message into the system log</para>
404 <indexterm zone="ch-system-util-linux logger">
405 <primary sortas="b-logger">logger</primary>
406 </indexterm>
407 </listitem>
408 </varlistentry>
409
410 <varlistentry id="look">
411 <term><command>look</command></term>
412 <listitem>
413 <para>Displays lines that begin with the given string</para>
414 <indexterm zone="ch-system-util-linux look">
415 <primary sortas="b-look">look</primary>
416 </indexterm>
417 </listitem>
418 </varlistentry>
419
420 <varlistentry id="losetup">
421 <term><command>losetup</command></term>
422 <listitem>
423 <para>Sets up and controls loop devices</para>
424 <indexterm zone="ch-system-util-linux losetup">
425 <primary sortas="b-losetup">losetup</primary>
426 </indexterm>
427 </listitem>
428 </varlistentry>
429
430 <varlistentry id="mcookie">
431 <term><command>mcookie</command></term>
432 <listitem>
433 <para>Generates magic cookies (128-bit random hexadecimal numbers) for
434 <command>xauth</command></para>
435 <indexterm zone="ch-system-util-linux mcookie">
436 <primary sortas="b-mcookie">mcookie</primary>
437 </indexterm>
438 </listitem>
439 </varlistentry>
440
441 <varlistentry id="mkfs">
442 <term><command>mkfs</command></term>
443 <listitem>
444 <para>Builds a file system on a device (usually a hard disk
445 partition)</para>
446 <indexterm zone="ch-system-util-linux mkfs">
447 <primary sortas="b-mkfs">mkfs</primary>
448 </indexterm>
449 </listitem>
450 </varlistentry>
451
452 <varlistentry id="mkfs.bfs">
453 <term><command>mkfs.bfs</command></term>
454 <listitem>
455 <para>Creates a Santa Cruz Operations (SCO) bfs file system</para>
456 <indexterm zone="ch-system-util-linux mkfs.bfs">
457 <primary sortas="b-mkfs.bfs">mkfs.bfs</primary>
458 </indexterm>
459 </listitem>
460 </varlistentry>
461
462 <varlistentry id="mkfs.cramfs">
463 <term><command>mkfs.cramfs</command></term>
464 <listitem>
465 <para>Creates a cramfs file system</para>
466 <indexterm zone="ch-system-util-linux mkfs.cramfs">
467 <primary sortas="b-mkfs.cramfs">mkfs.cramfs</primary>
468 </indexterm>
469 </listitem>
470 </varlistentry>
471
472 <varlistentry id="mkfs.minix">
473 <term><command>mkfs.minix</command></term>
474 <listitem>
475 <para>Creates a Minix file system</para>
476 <indexterm zone="ch-system-util-linux mkfs.minix">
477 <primary sortas="b-mkfs.minix">mkfs.minix</primary>
478 </indexterm>
479 </listitem>
480 </varlistentry>
481
482 <varlistentry id="mkswap">
483 <term><command>mkswap</command></term>
484 <listitem>
485 <para>Initializes the given device or file to be used as a swap
486 area</para>
487 <indexterm zone="ch-system-util-linux mkswap">
488 <primary sortas="b-mkswap">mkswap</primary>
489 </indexterm>
490 </listitem>
491 </varlistentry>
492
493 <varlistentry id="more">
494 <term><command>more</command></term>
495 <listitem>
496 <para>A filter for paging through text one screen at a time</para>
497 <indexterm zone="ch-system-util-linux more">
498 <primary sortas="b-more">more</primary>
499 </indexterm>
500 </listitem>
501 </varlistentry>
502
503 <varlistentry id="mount">
504 <term><command>mount</command></term>
505 <listitem>
506 <para>Attaches the file system on the given device to a specified
507 directory in the file-system tree</para>
508 <indexterm zone="ch-system-util-linux mount">
509 <primary sortas="b-mount">mount</primary>
510 </indexterm>
511 </listitem>
512 </varlistentry>
513
514 <varlistentry id="namei">
515 <term><command>namei</command></term>
516 <listitem>
517 <para>Shows the symbolic links in the given pathnames</para>
518 <indexterm zone="ch-system-util-linux namei">
519 <primary sortas="b-namei">namei</primary>
520 </indexterm>
521 </listitem>
522 </varlistentry>
523
524 <varlistentry id="pg">
525 <term><command>pg</command></term>
526 <listitem>
527 <para>Displays a text file one screen full at a time</para>
528 <indexterm zone="ch-system-util-linux pg">
529 <primary sortas="b-pg">pg</primary>
530 </indexterm>
531 </listitem>
532 </varlistentry>
533
534 <varlistentry id="pivot_root">
535 <term><command>pivot_root</command></term>
536 <listitem>
537 <para>Makes the given file system the new root file system of the
538 current process</para>
539 <indexterm zone="ch-system-util-linux pivot_root">
540 <primary sortas="b-pivot_root">pivot_root</primary>
541 </indexterm>
542 </listitem>
543 </varlistentry>
544
545 <varlistentry id="ramsize">
546 <term><command>ramsize</command></term>
547 <listitem>
548 <para>Sets the size of the RAM disk in a bootable image</para>
549 <indexterm zone="ch-system-util-linux ramsize">
550 <primary sortas="b-ramsize">ramsize</primary>
551 </indexterm>
552 </listitem>
553 </varlistentry>
554
555 <varlistentry id="raw">
556 <term><command>raw</command></term>
557 <listitem>
558 <para>Used to bind a Linux raw character device to a block
559 device</para>
560 <indexterm zone="ch-system-util-linux raw">
561 <primary sortas="b-raw">raw</primary>
562 </indexterm>
563 </listitem>
564 </varlistentry>
565
566 <varlistentry id="rdev">
567 <term><command>rdev</command></term>
568 <listitem>
569 <para>Queries and sets the root device, among other things, in a
570 bootable image</para>
571 <indexterm zone="ch-system-util-linux rdev">
572 <primary sortas="b-rdev">rdev</primary>
573 </indexterm>
574 </listitem>
575 </varlistentry>
576
577 <varlistentry id="readprofile">
578 <term><command>readprofile</command></term>
579 <listitem>
580 <para>Reads kernel profiling information</para>
581 <indexterm zone="ch-system-util-linux readprofile">
582 <primary sortas="b-readprofile">readprofile</primary>
583 </indexterm>
584 </listitem>
585 </varlistentry>
586
587 <varlistentry id="rename">
588 <term><command>rename</command></term>
589 <listitem>
590 <para>Renames the given files, replacing a given string with
591 another</para>
592 <indexterm zone="ch-system-util-linux rename">
593 <primary sortas="b-rename">rename</primary>
594 </indexterm>
595 </listitem>
596 </varlistentry>
597
598 <varlistentry id="renice">
599 <term><command>renice</command></term>
600 <listitem>
601 <para>Alters the priority of running processes</para>
602 <indexterm zone="ch-system-util-linux renice">
603 <primary sortas="b-renice">renice</primary>
604 </indexterm>
605 </listitem>
606 </varlistentry>
607
608 <varlistentry id="rev">
609 <term><command>rev</command></term>
610 <listitem>
611 <para>Reverses the lines of a given file</para>
612 <indexterm zone="ch-system-util-linux rev">
613 <primary sortas="b-rev">rev</primary>
614 </indexterm>
615 </listitem>
616 </varlistentry>
617
618 <varlistentry id="rootflags">
619 <term><command>rootflags</command></term>
620 <listitem>
621 <para>Sets the rootflags in a bootable image</para>
622 <indexterm zone="ch-system-util-linux rootflags">
623 <primary sortas="b-rootflags">rootflags</primary>
624 </indexterm>
625 </listitem>
626 </varlistentry>
627
628 <varlistentry id="script">
629 <term><command>script</command></term>
630 <listitem>
631 <para>Makes a typescript of a terminal session</para>
632 <indexterm zone="ch-system-util-linux script">
633 <primary sortas="b-script">script</primary>
634 </indexterm>
635 </listitem>
636 </varlistentry>
637
638 <varlistentry id="setfdprm">
639 <term><command>setfdprm</command></term>
640 <listitem>
641 <para>Sets user-provided floppy disk parameters</para>
642 <indexterm zone="ch-system-util-linux setfdprm">
643 <primary sortas="b-setfdprm">setfdprm</primary>
644 </indexterm>
645 </listitem>
646 </varlistentry>
647
648 <varlistentry id="setsid">
649 <term><command>setsid</command></term>
650 <listitem>
651 <para>Runs the given program in a new session</para>
652 <indexterm zone="ch-system-util-linux setsid">
653 <primary sortas="b-setsid">setsid</primary>
654 </indexterm>
655 </listitem>
656 </varlistentry>
657
658 <varlistentry id="setterm">
659 <term><command>setterm</command></term>
660 <listitem>
661 <para>Sets terminal attributes</para>
662 <indexterm zone="ch-system-util-linux setterm">
663 <primary sortas="b-setterm">setterm</primary>
664 </indexterm>
665 </listitem>
666 </varlistentry>
667
668 <varlistentry id="sfdisk">
669 <term><command>sfdisk</command></term>
670 <listitem>
671 <para>A disk partition table manipulator</para>
672 <indexterm zone="ch-system-util-linux sfdisk">
673 <primary sortas="b-sfdisk">sfdisk</primary>
674 </indexterm>
675 </listitem>
676 </varlistentry>
677
678 <varlistentry id="swapdev">
679 <term><command>swapdev</command></term>
680 <listitem>
681 <para>Sets the swap device in a bootable image</para>
682 <indexterm zone="ch-system-util-linux swapdev">
683 <primary sortas="b-swapdev">swapdev</primary>
684 </indexterm>
685 </listitem>
686 </varlistentry>
687
688 <varlistentry id="swapoff">
689 <term><command>swapoff</command></term>
690 <listitem>
691 <para>Disables devices and files for paging and swapping</para>
692 <indexterm zone="ch-system-util-linux swapoff">
693 <primary sortas="b-swapoff">swapoff</primary>
694 </indexterm>
695 </listitem>
696 </varlistentry>
697
698 <varlistentry id="swapon">
699 <term><command>swapon</command></term>
700 <listitem>
701 <para>Enables devices and files for paging and swapping and
702 lists the devices and files currently in use</para>
703 <indexterm zone="ch-system-util-linux swapon">
704 <primary sortas="b-swapon">swapon</primary>
705 </indexterm>
706 </listitem>
707 </varlistentry>
708
709 <varlistentry id="tunelp">
710 <term><command>tunelp</command></term>
711 <listitem>
712 <para>Tunes the parameters of the line printer</para>
713 <indexterm zone="ch-system-util-linux tunelp">
714 <primary sortas="b-tunelp">tunelp</primary>
715 </indexterm>
716 </listitem>
717 </varlistentry>
718
719 <varlistentry id="ul">
720 <term><command>ul</command></term>
721 <listitem>
722 <para>A filter for translating underscores into escape sequences
723 indicating underlining for the terminal in use</para>
724 <indexterm zone="ch-system-util-linux ul">
725 <primary sortas="b-ul">ul</primary>
726 </indexterm>
727 </listitem>
728 </varlistentry>
729
730 <varlistentry id="umount">
731 <term><command>umount</command></term>
732 <listitem>
733 <para>Disconnects a file system from the system's file tree</para>
734 <indexterm zone="ch-system-util-linux umount">
735 <primary sortas="b-umount">umount</primary>
736 </indexterm>
737 </listitem>
738 </varlistentry>
739
740 <varlistentry id="vidmode">
741 <term><command>vidmode</command></term>
742 <listitem>
743 <para>Sets the video mode in a bootable image</para>
744 <indexterm zone="ch-system-util-linux vidmode">
745 <primary sortas="b-vidmode">vidmode</primary>
746 </indexterm>
747 </listitem>
748 </varlistentry>
749
750 <varlistentry id="whereis">
751 <term><command>whereis</command></term>
752 <listitem>
753 <para>Reports the location of the binary, source, and man page
754 for the given command</para>
755 <indexterm zone="ch-system-util-linux whereis">
756 <primary sortas="b-whereis">whereis</primary>
757 </indexterm>
758 </listitem>
759 </varlistentry>
760
761 <varlistentry id="write">
762 <term><command>write</command></term>
763 <listitem>
764 <para>Sends a message to the given user <emphasis>if</emphasis> that
765 user has not disabled receipt of such messages</para>
766 <indexterm zone="ch-system-util-linux write">
767 <primary sortas="b-write">write</primary>
768 </indexterm>
769 </listitem>
770 </varlistentry>
771
772 </variablelist>
773
774 </sect2>
775
776</sect1>
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