source: BOOK/final-system/common/util-linux-ng.xml@ c814e64

clfs-1.2 clfs-2.1 clfs-3.0.0-systemd clfs-3.0.0-sysvinit systemd sysvinit
Last change on this file since c814e64 was 4df8ff7, checked in by Joe Ciccone <jciccone@…>, 17 years ago

Remove $BUILD32 from non multilib build.

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