source: chapter06/util-linux.xml@ c11bcb7

Last change on this file since c11bcb7 was c11bcb7, checked in by Manuel Canales Esparcia <manuel@…>, 17 years ago

Merged r8366 from trunk.

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[673b0d8]1<?xml version="1.0" encoding="ISO-8859-1"?>
[b06ca36]2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
[673b0d8]4 <!ENTITY % general-entities SYSTEM "../general.ent">
5 %general-entities;
6]>
[ddd5542]7
[81fd230]8<sect1 id="ch-system-util-linux" role="wrap">
[ddd5542]9 <?dbhtml filename="util-linux.html"?>
10
[c11bcb7]11 <sect1info condition="script">
12 <productname>util-linux</productname>
13 <productnumber>&util-linux-version;</productnumber>
14 <address>&util-linux-url;</address>
15 </sect1info>
16
[ddd5542]17 <title>Util-linux-&util-linux-version;</title>
18
19 <indexterm zone="ch-system-util-linux">
20 <primary sortas="a-Util-linux">Util-linux</primary>
21 </indexterm>
22
23 <sect2 role="package">
24 <title/>
25
26 <para>The Util-linux package contains miscellaneous utility programs. Among
27 them are utilities for handling file systems, consoles, partitions, and
28 messages.</para>
29
30 <segmentedlist>
31 <segtitle>&buildtime;</segtitle>
32 <segtitle>&diskspace;</segtitle>
33
34 <seglistitem>
[e4a5635]35 <seg>&util-linux-ch6-sbu;</seg>
36 <seg>&util-linux-ch6-du;</seg>
[ddd5542]37 </seglistitem>
38 </segmentedlist>
39
40 </sect2>
41
42 <sect2 role="installation">
43 <title>FHS compliance notes</title>
44
45 <para>The FHS recommends using the <filename
46 class="directory">/var/lib/hwclock</filename> directory instead of the
47 usual <filename class="directory">/etc</filename> directory as the
48 location for the <filename>adjtime</filename> file. To make the
49 <command>hwclock</command> program FHS-compliant, run the
50 following:</para>
[673b0d8]51
[a728d16]52<screen><userinput>sed -e 's@etc/adjtime@var/lib/hwclock/adjtime@g' \
53 -i $(grep -rl '/etc/adjtime' .)
[d0cada48]54mkdir -pv /var/lib/hwclock</userinput></screen>
[673b0d8]55
[ddd5542]56 </sect2>
[673b0d8]57
[ddd5542]58 <sect2 role="installation">
59 <title>Installation of Util-linux</title>
[673b0d8]60
[93bc4a2]61 <para>Util-linux fails to compile against newer versions of Linux kernel
62 headers. The following patches properly fix the problems:</para>
[307d0a2]63
[93bc4a2]64<screen><userinput>patch -Np1 -i ../&util-linux-cramfs-patch;
65patch -Np1 -i ../&util-linux-lseek-patch;</userinput></screen>
[307d0a2]66
[ddd5542]67 <para>Prepare Util-linux for compilation:</para>
[673b0d8]68
69<screen><userinput>./configure</userinput></screen>
70
[ddd5542]71 <para>Compile the package:</para>
[673b0d8]72
73<screen><userinput>make HAVE_KILL=yes HAVE_SLN=yes</userinput></screen>
74
[ddd5542]75 <variablelist>
76 <title>The meaning of the make parameters:</title>
77
78 <varlistentry>
79 <term><parameter>HAVE_KILL=yes</parameter></term>
80 <listitem>
81 <para>This prevents the <command>kill</command> program (already
82 installed by Procps) from being built and installed again.</para>
83 </listitem>
84 </varlistentry>
[81fd230]85
[ddd5542]86 <varlistentry>
87 <term><parameter>HAVE_SLN=yes</parameter></term>
88 <listitem>
89 <para>This prevents the <command>sln</command> program (a
90 statically linked version of <command>ln</command> already installed
91 by Glibc) from being built and installed again.</para>
92 </listitem>
93 </varlistentry>
[81fd230]94
[ddd5542]95 </variablelist>
[81fd230]96
[ddd5542]97 <para>This package does not come with a test suite.</para>
[81fd230]98
[71192130]99 <para>Install the package:</para>
[673b0d8]100
[71192130]101<screen><userinput>make HAVE_KILL=yes HAVE_SLN=yes install</userinput></screen>
[673b0d8]102
[ddd5542]103 </sect2>
104
105 <sect2 id="contents-utillinux" role="content">
106 <title>Contents of Util-linux</title>
107
108 <segmentedlist>
109 <segtitle>Installed programs</segtitle>
110
111 <seglistitem>
112 <seg>agetty, arch, blockdev, cal, cfdisk, chkdupexe, col, colcrt,
113 colrm, column, ctrlaltdel, cytune, ddate, dmesg, elvtune, fdformat,
[8bc46a5]114 fdisk, flock, fsck.cramfs, fsck.minix, getopt, hexdump, hwclock, ipcrm,
[ddd5542]115 ipcs, isosize, line, logger, look, losetup, mcookie, mkfs, mkfs.bfs,
116 mkfs.cramfs, mkfs.minix, mkswap, more, mount, namei, pg, pivot_root,
117 ramsize (link to rdev), raw, rdev, readprofile, rename, renice, rev,
118 rootflags (link to rdev), script, setfdprm, setsid, setterm, sfdisk,
[8bc46a5]119 swapoff (link to swapon), swapon, tailf, tunelp, ul, umount,
120 vidmode (link to rdev), whereis, and write</seg>
[ddd5542]121 </seglistitem>
122 </segmentedlist>
123
124 <variablelist>
125 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
126 <?dbfo list-presentation="list"?>
127 <?dbhtml list-presentation="table"?>
128
129 <varlistentry id="agetty">
130 <term><command>agetty</command></term>
131 <listitem>
132 <para>Opens a tty port, prompts for a login name,
133 and then invokes the <command>login</command> program</para>
134 <indexterm zone="ch-system-util-linux agetty">
135 <primary sortas="b-agetty">agetty</primary>
136 </indexterm>
137 </listitem>
138 </varlistentry>
139
140 <varlistentry id="arch">
141 <term><command>arch</command></term>
142 <listitem>
143 <para>Reports the machine's architecture</para>
144 <indexterm zone="ch-system-util-linux arch">
145 <primary sortas="b-arch">arch</primary>
146 </indexterm>
147 </listitem>
148 </varlistentry>
149
150 <varlistentry id="blockdev">
151 <term><command>blockdev</command></term>
152 <listitem>
153 <para>Allows users to call block device ioctls from the command
154 line</para>
155 <indexterm zone="ch-system-util-linux blockdev">
156 <primary sortas="b-blockdev">blockdev</primary>
157 </indexterm>
158 </listitem>
159 </varlistentry>
160
161 <varlistentry id="cal">
162 <term><command>cal</command></term>
163 <listitem>
164 <para>Displays a simple calendar</para>
165 <indexterm zone="ch-system-util-linux cal">
166 <primary sortas="b-cal">cal</primary>
167 </indexterm>
168 </listitem>
169 </varlistentry>
170
171 <varlistentry id="cfdisk">
172 <term><command>cfdisk</command></term>
173 <listitem>
174 <para>Manipulates the partition table of the given device</para>
175 <indexterm zone="ch-system-util-linux cfdisk">
176 <primary sortas="b-cfdisk">cfdisk</primary>
177 </indexterm>
178 </listitem>
179 </varlistentry>
180
181 <varlistentry id="chkdupexe">
182 <term><command>chkdupexe</command></term>
183 <listitem>
184 <para>Finds duplicate executables</para>
185 <indexterm zone="ch-system-util-linux chkdupexe">
186 <primary sortas="b-chkdupexe">chkdupexe</primary>
187 </indexterm>
188 </listitem>
189 </varlistentry>
190
191 <varlistentry id="col">
192 <term><command>col</command></term>
193 <listitem>
194 <para>Filters out reverse line feeds</para>
195 <indexterm zone="ch-system-util-linux col">
196 <primary sortas="b-col">col</primary>
197 </indexterm>
198 </listitem>
199 </varlistentry>
200
201 <varlistentry id="colcrt">
202 <term><command>colcrt</command></term>
203 <listitem>
204 <para>Filters <command>nroff</command> output for terminals
205 that lack some capabilities, such as overstriking and half-lines</para>
206 <indexterm zone="ch-system-util-linux colcrt">
207 <primary sortas="b-colcrt">colcrt</primary>
208 </indexterm>
209 </listitem>
210 </varlistentry>
211
212 <varlistentry id="colrm">
213 <term><command>colrm</command></term>
214 <listitem>
215 <para>Filters out the given columns</para>
216 <indexterm zone="ch-system-util-linux colrm">
217 <primary sortas="b-colrm">colrm</primary>
218 </indexterm>
219 </listitem>
220 </varlistentry>
221
222 <varlistentry id="column">
223 <term><command>column</command></term>
224 <listitem>
225 <para>Formats a given file into multiple columns</para>
226 <indexterm zone="ch-system-util-linux column">
227 <primary sortas="b-column">column</primary>
228 </indexterm>
229 </listitem>
230 </varlistentry>
231
232 <varlistentry id="ctrlaltdel">
233 <term><command>ctrlaltdel</command></term>
234 <listitem>
235 <para>Sets the function of the Ctrl+Alt+Del key combination to a
236 hard or a soft reset</para>
237 <indexterm zone="ch-system-util-linux ctrlaltdel">
238 <primary sortas="b-ctrlaltdel">ctrlaltdel</primary>
239 </indexterm>
240 </listitem>
241 </varlistentry>
242
243 <varlistentry id="cytune">
244 <term><command>cytune</command></term>
245 <listitem>
246 <para>Tunes the parameters of the serial line drivers for
247 Cyclades cards</para>
248 <indexterm zone="ch-system-util-linux cytune">
249 <primary sortas="b-cytune">cytune</primary>
250 </indexterm>
251 </listitem>
252 </varlistentry>
253
254 <varlistentry id="ddate">
255 <term><command>ddate</command></term>
256 <listitem>
257 <para>Gives the Discordian date or converts the given Gregorian date
258 to a Discordian one</para>
259 <indexterm zone="ch-system-util-linux ddate">
260 <primary sortas="b-ddate">ddate</primary>
261 </indexterm>
262 </listitem>
263 </varlistentry>
264
265 <varlistentry id="dmesg">
266 <term><command>dmesg</command></term>
267 <listitem>
268 <para>Dumps the kernel boot messages</para>
269 <indexterm zone="ch-system-util-linux dmesg">
270 <primary sortas="b-dmesg">dmesg</primary>
271 </indexterm>
272 </listitem>
273 </varlistentry>
274
275 <varlistentry id="elvtune">
276 <term><command>elvtune</command></term>
277 <listitem>
278 <para>Tunes the performance and interactivity of a block
279 device</para>
280 <indexterm zone="ch-system-util-linux elvtune">
281 <primary sortas="b-elvtune">elvtune</primary>
282 </indexterm>
283 </listitem>
284 </varlistentry>
285
286 <varlistentry id="fdformat">
287 <term><command>fdformat</command></term>
288 <listitem>
289 <para>Low-level formats a floppy disk</para>
290 <indexterm zone="ch-system-util-linux fdformat">
291 <primary sortas="b-fdformat">fdformat</primary>
292 </indexterm>
293 </listitem>
294 </varlistentry>
295
[2791a8e]296 <varlistentry id="fdisk">
297 <term><command>fdisk</command></term>
298 <listitem>
299 <para>Manipulates the paritition table of the given device</para>
300 <indexterm zone="ch-system-util-linux fdisk">
301 <primary sortas="b-fdisk">fdisk</primary>
302 </indexterm>
303 </listitem>
304 </varlistentry>
305
[8bc46a5]306 <varlistentry id="flock">
307 <term><command>flock</command></term>
308 <listitem>
309 <para>Acquires a file lock and then executes a command with the lock
310 held</para>
311 <indexterm zone="ch-system-util-linux flock">
[a2add74]312 <primary sortas="b-flock">flock</primary>
[8bc46a5]313 </indexterm>
314 </listitem>
315 </varlistentry>
316
[ddd5542]317 <varlistentry id="fsck.cramfs">
318 <term><command>fsck.cramfs</command></term>
319 <listitem>
320 <para>Performs a consistency check on the Cramfs file system on the
321 given device</para>
322 <indexterm zone="ch-system-util-linux fsck.cramfs">
323 <primary sortas="b-fsck.cramfs">fsck.cramfs</primary>
324 </indexterm>
325 </listitem>
326 </varlistentry>
327
328 <varlistentry id="fsck.minix">
329 <term><command>fsck.minix</command></term>
330 <listitem>
331 <para>Performs a consistency check on the Minix file system on the
332 given device</para>
333 <indexterm zone="ch-system-util-linux fsck.minix">
334 <primary sortas="b-fsck.minix">fsck.minix</primary>
335 </indexterm>
336 </listitem>
337 </varlistentry>
338
339 <varlistentry id="getopt">
340 <term><command>getopt</command></term>
341 <listitem>
342 <para>Parses options in the given command line</para>
343 <indexterm zone="ch-system-util-linux getopt">
344 <primary sortas="b-getopt">getopt</primary>
345 </indexterm>
346 </listitem>
347 </varlistentry>
348
349 <varlistentry id="hexdump">
350 <term><command>hexdump</command></term>
351 <listitem>
352 <para>Dumps the given file in hexadecimal or in another given
353 format</para>
354 <indexterm zone="ch-system-util-linux hexdump">
355 <primary sortas="b-hexdump">hexdump</primary>
356 </indexterm>
357 </listitem>
358 </varlistentry>
359
360 <varlistentry id="hwclock">
361 <term><command>hwclock</command></term>
362 <listitem>
363 <para>Reads or sets the system's hardware clock, also called
364 the Real-Time Clock (RTC) or Basic Input-Output System (BIOS)
365 clock</para>
366 <indexterm zone="ch-system-util-linux hwclock">
367 <primary sortas="b-hwclock">hwclock</primary>
368 </indexterm>
369 </listitem>
370 </varlistentry>
371
372 <varlistentry id="ipcrm">
373 <term><command>ipcrm</command></term>
374 <listitem>
375 <para>Removes the given Inter-Process Communication (IPC) resource</para>
376 <indexterm zone="ch-system-util-linux ipcrm">
377 <primary sortas="b-ipcrm">ipcrm</primary>
378 </indexterm>
379 </listitem>
380 </varlistentry>
381
382 <varlistentry id="ipcs">
383 <term><command>ipcs</command></term>
384 <listitem>
385 <para>Provides IPC status information</para>
386 <indexterm zone="ch-system-util-linux ipcs">
387 <primary sortas="b-ipcs">ipcs</primary>
388 </indexterm>
389 </listitem>
390 </varlistentry>
391
392 <varlistentry id="isosize">
393 <term><command>isosize</command></term>
394 <listitem>
395 <para>Reports the size of an iso9660 file system</para>
396 <indexterm zone="ch-system-util-linux isosize">
397 <primary sortas="b-isosize">isosize</primary>
398 </indexterm>
399 </listitem>
400 </varlistentry>
401
402 <varlistentry id="line">
403 <term><command>line</command></term>
404 <listitem>
405 <para>Copies a single line</para>
406 <indexterm zone="ch-system-util-linux line">
407 <primary sortas="b-line">line</primary>
408 </indexterm>
409 </listitem>
410 </varlistentry>
411
412 <varlistentry id="logger">
413 <term><command>logger</command></term>
414 <listitem>
415 <para>Enters the given message into the system log</para>
416 <indexterm zone="ch-system-util-linux logger">
417 <primary sortas="b-logger">logger</primary>
418 </indexterm>
419 </listitem>
420 </varlistentry>
421
422 <varlistentry id="look">
423 <term><command>look</command></term>
424 <listitem>
425 <para>Displays lines that begin with the given string</para>
426 <indexterm zone="ch-system-util-linux look">
427 <primary sortas="b-look">look</primary>
428 </indexterm>
429 </listitem>
430 </varlistentry>
431
432 <varlistentry id="losetup">
433 <term><command>losetup</command></term>
434 <listitem>
435 <para>Sets up and controls loop devices</para>
436 <indexterm zone="ch-system-util-linux losetup">
437 <primary sortas="b-losetup">losetup</primary>
438 </indexterm>
439 </listitem>
440 </varlistentry>
441
442 <varlistentry id="mcookie">
443 <term><command>mcookie</command></term>
444 <listitem>
445 <para>Generates magic cookies (128-bit random hexadecimal numbers) for
446 <command>xauth</command></para>
447 <indexterm zone="ch-system-util-linux mcookie">
448 <primary sortas="b-mcookie">mcookie</primary>
449 </indexterm>
450 </listitem>
451 </varlistentry>
452
453 <varlistentry id="mkfs">
454 <term><command>mkfs</command></term>
455 <listitem>
456 <para>Builds a file system on a device (usually a hard disk
457 partition)</para>
458 <indexterm zone="ch-system-util-linux mkfs">
459 <primary sortas="b-mkfs">mkfs</primary>
460 </indexterm>
461 </listitem>
462 </varlistentry>
463
464 <varlistentry id="mkfs.bfs">
465 <term><command>mkfs.bfs</command></term>
466 <listitem>
467 <para>Creates a Santa Cruz Operations (SCO) bfs file system</para>
468 <indexterm zone="ch-system-util-linux mkfs.bfs">
469 <primary sortas="b-mkfs.bfs">mkfs.bfs</primary>
470 </indexterm>
471 </listitem>
472 </varlistentry>
473
474 <varlistentry id="mkfs.cramfs">
475 <term><command>mkfs.cramfs</command></term>
476 <listitem>
477 <para>Creates a cramfs file system</para>
478 <indexterm zone="ch-system-util-linux mkfs.cramfs">
479 <primary sortas="b-mkfs.cramfs">mkfs.cramfs</primary>
480 </indexterm>
481 </listitem>
482 </varlistentry>
483
484 <varlistentry id="mkfs.minix">
485 <term><command>mkfs.minix</command></term>
486 <listitem>
487 <para>Creates a Minix file system</para>
488 <indexterm zone="ch-system-util-linux mkfs.minix">
489 <primary sortas="b-mkfs.minix">mkfs.minix</primary>
490 </indexterm>
491 </listitem>
492 </varlistentry>
493
494 <varlistentry id="mkswap">
495 <term><command>mkswap</command></term>
496 <listitem>
497 <para>Initializes the given device or file to be used as a swap
498 area</para>
499 <indexterm zone="ch-system-util-linux mkswap">
500 <primary sortas="b-mkswap">mkswap</primary>
501 </indexterm>
502 </listitem>
503 </varlistentry>
504
505 <varlistentry id="more">
506 <term><command>more</command></term>
507 <listitem>
508 <para>A filter for paging through text one screen at a time</para>
509 <indexterm zone="ch-system-util-linux more">
510 <primary sortas="b-more">more</primary>
511 </indexterm>
512 </listitem>
513 </varlistentry>
514
515 <varlistentry id="mount">
516 <term><command>mount</command></term>
517 <listitem>
518 <para>Attaches the file system on the given device to a specified
519 directory in the file-system tree</para>
520 <indexterm zone="ch-system-util-linux mount">
521 <primary sortas="b-mount">mount</primary>
522 </indexterm>
523 </listitem>
524 </varlistentry>
525
526 <varlistentry id="namei">
527 <term><command>namei</command></term>
528 <listitem>
529 <para>Shows the symbolic links in the given pathnames</para>
530 <indexterm zone="ch-system-util-linux namei">
531 <primary sortas="b-namei">namei</primary>
532 </indexterm>
533 </listitem>
534 </varlistentry>
535
536 <varlistentry id="pg">
537 <term><command>pg</command></term>
538 <listitem>
539 <para>Displays a text file one screen full at a time</para>
540 <indexterm zone="ch-system-util-linux pg">
541 <primary sortas="b-pg">pg</primary>
542 </indexterm>
543 </listitem>
544 </varlistentry>
545
546 <varlistentry id="pivot_root">
547 <term><command>pivot_root</command></term>
548 <listitem>
549 <para>Makes the given file system the new root file system of the
550 current process</para>
551 <indexterm zone="ch-system-util-linux pivot_root">
552 <primary sortas="b-pivot_root">pivot_root</primary>
553 </indexterm>
554 </listitem>
555 </varlistentry>
556
557 <varlistentry id="ramsize">
558 <term><command>ramsize</command></term>
559 <listitem>
560 <para>Sets the size of the RAM disk in a bootable image</para>
561 <indexterm zone="ch-system-util-linux ramsize">
562 <primary sortas="b-ramsize">ramsize</primary>
563 </indexterm>
564 </listitem>
565 </varlistentry>
566
567 <varlistentry id="raw">
568 <term><command>raw</command></term>
569 <listitem>
570 <para>Used to bind a Linux raw character device to a block
571 device</para>
572 <indexterm zone="ch-system-util-linux raw">
573 <primary sortas="b-raw">raw</primary>
574 </indexterm>
575 </listitem>
576 </varlistentry>
577
578 <varlistentry id="rdev">
579 <term><command>rdev</command></term>
580 <listitem>
581 <para>Queries and sets the root device, among other things, in a
582 bootable image</para>
583 <indexterm zone="ch-system-util-linux rdev">
584 <primary sortas="b-rdev">rdev</primary>
585 </indexterm>
586 </listitem>
587 </varlistentry>
588
589 <varlistentry id="readprofile">
590 <term><command>readprofile</command></term>
591 <listitem>
592 <para>Reads kernel profiling information</para>
593 <indexterm zone="ch-system-util-linux readprofile">
594 <primary sortas="b-readprofile">readprofile</primary>
595 </indexterm>
596 </listitem>
597 </varlistentry>
598
599 <varlistentry id="rename">
600 <term><command>rename</command></term>
601 <listitem>
602 <para>Renames the given files, replacing a given string with
603 another</para>
604 <indexterm zone="ch-system-util-linux rename">
605 <primary sortas="b-rename">rename</primary>
606 </indexterm>
607 </listitem>
608 </varlistentry>
609
610 <varlistentry id="renice">
611 <term><command>renice</command></term>
612 <listitem>
613 <para>Alters the priority of running processes</para>
614 <indexterm zone="ch-system-util-linux renice">
615 <primary sortas="b-renice">renice</primary>
616 </indexterm>
617 </listitem>
618 </varlistentry>
619
620 <varlistentry id="rev">
621 <term><command>rev</command></term>
622 <listitem>
623 <para>Reverses the lines of a given file</para>
624 <indexterm zone="ch-system-util-linux rev">
625 <primary sortas="b-rev">rev</primary>
626 </indexterm>
627 </listitem>
628 </varlistentry>
629
630 <varlistentry id="rootflags">
631 <term><command>rootflags</command></term>
632 <listitem>
633 <para>Sets the rootflags in a bootable image</para>
634 <indexterm zone="ch-system-util-linux rootflags">
635 <primary sortas="b-rootflags">rootflags</primary>
636 </indexterm>
637 </listitem>
638 </varlistentry>
639
640 <varlistentry id="script">
641 <term><command>script</command></term>
642 <listitem>
643 <para>Makes a typescript of a terminal session</para>
644 <indexterm zone="ch-system-util-linux script">
645 <primary sortas="b-script">script</primary>
646 </indexterm>
647 </listitem>
648 </varlistentry>
649
650 <varlistentry id="setfdprm">
651 <term><command>setfdprm</command></term>
652 <listitem>
653 <para>Sets user-provided floppy disk parameters</para>
654 <indexterm zone="ch-system-util-linux setfdprm">
655 <primary sortas="b-setfdprm">setfdprm</primary>
656 </indexterm>
657 </listitem>
658 </varlistentry>
659
660 <varlistentry id="setsid">
661 <term><command>setsid</command></term>
662 <listitem>
663 <para>Runs the given program in a new session</para>
664 <indexterm zone="ch-system-util-linux setsid">
665 <primary sortas="b-setsid">setsid</primary>
666 </indexterm>
667 </listitem>
668 </varlistentry>
669
670 <varlistentry id="setterm">
671 <term><command>setterm</command></term>
672 <listitem>
673 <para>Sets terminal attributes</para>
674 <indexterm zone="ch-system-util-linux setterm">
675 <primary sortas="b-setterm">setterm</primary>
676 </indexterm>
677 </listitem>
678 </varlistentry>
679
680 <varlistentry id="sfdisk">
681 <term><command>sfdisk</command></term>
682 <listitem>
683 <para>A disk partition table manipulator</para>
684 <indexterm zone="ch-system-util-linux sfdisk">
685 <primary sortas="b-sfdisk">sfdisk</primary>
686 </indexterm>
687 </listitem>
688 </varlistentry>
689
690 <varlistentry id="swapoff">
691 <term><command>swapoff</command></term>
692 <listitem>
693 <para>Disables devices and files for paging and swapping</para>
694 <indexterm zone="ch-system-util-linux swapoff">
695 <primary sortas="b-swapoff">swapoff</primary>
696 </indexterm>
697 </listitem>
698 </varlistentry>
699
700 <varlistentry id="swapon">
701 <term><command>swapon</command></term>
702 <listitem>
703 <para>Enables devices and files for paging and swapping and
704 lists the devices and files currently in use</para>
705 <indexterm zone="ch-system-util-linux swapon">
706 <primary sortas="b-swapon">swapon</primary>
707 </indexterm>
708 </listitem>
709 </varlistentry>
710
[8bc46a5]711 <varlistentry id="tailf">
712 <term><command>tailf</command></term>
713 <listitem>
714 <para>Tracks the growth of a log file. Displays the last 10 lines
715 of a log file, then continues displaying any new entries in the
716 log file as they are created</para>
717 <indexterm zone="ch-system-util-linux tailf">
718 <primary sortas="b-tailf">tailf</primary>
719 </indexterm>
720 </listitem>
721 </varlistentry>
722
[ddd5542]723 <varlistentry id="tunelp">
724 <term><command>tunelp</command></term>
725 <listitem>
726 <para>Tunes the parameters of the line printer</para>
727 <indexterm zone="ch-system-util-linux tunelp">
728 <primary sortas="b-tunelp">tunelp</primary>
729 </indexterm>
730 </listitem>
731 </varlistentry>
732
733 <varlistentry id="ul">
734 <term><command>ul</command></term>
735 <listitem>
736 <para>A filter for translating underscores into escape sequences
737 indicating underlining for the terminal in use</para>
738 <indexterm zone="ch-system-util-linux ul">
739 <primary sortas="b-ul">ul</primary>
740 </indexterm>
741 </listitem>
742 </varlistentry>
743
744 <varlistentry id="umount">
745 <term><command>umount</command></term>
746 <listitem>
747 <para>Disconnects a file system from the system's file tree</para>
748 <indexterm zone="ch-system-util-linux umount">
749 <primary sortas="b-umount">umount</primary>
750 </indexterm>
751 </listitem>
752 </varlistentry>
753
754 <varlistentry id="vidmode">
755 <term><command>vidmode</command></term>
756 <listitem>
757 <para>Sets the video mode in a bootable image</para>
758 <indexterm zone="ch-system-util-linux vidmode">
759 <primary sortas="b-vidmode">vidmode</primary>
760 </indexterm>
761 </listitem>
762 </varlistentry>
763
764 <varlistentry id="whereis">
765 <term><command>whereis</command></term>
766 <listitem>
767 <para>Reports the location of the binary, source, and man page
768 for the given command</para>
769 <indexterm zone="ch-system-util-linux whereis">
770 <primary sortas="b-whereis">whereis</primary>
771 </indexterm>
772 </listitem>
773 </varlistentry>
774
775 <varlistentry id="write">
776 <term><command>write</command></term>
777 <listitem>
778 <para>Sends a message to the given user <emphasis>if</emphasis> that
779 user has not disabled receipt of such messages</para>
780 <indexterm zone="ch-system-util-linux write">
781 <primary sortas="b-write">write</primary>
782 </indexterm>
783 </listitem>
784 </varlistentry>
785
786 </variablelist>
787
788 </sect2>
[673b0d8]789
790</sect1>
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