source: chapter06/util-linux-ng.xml@ 5102323

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Last change on this file since 5102323 was 6541b70, checked in by Bruce Dubbs <bdubbs@…>, 14 years ago

Update to util-linix-ng-2.18

Exapand and reformat notes concerning grub.cfg

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@9330 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

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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 <sect1info condition="script">
12 <productname>util-linux-ng</productname>
13 <productnumber>&util-linux-ng-version;</productnumber>
14 <address>&util-linux-ng-url;</address>
15 </sect1info>
16
17 <title>Util-linux-ng-&util-linux-ng-version;</title>
18
19 <indexterm zone="ch-system-util-linux-ng">
20 <primary sortas="a-Util-linux-ng">Util-linux-ng</primary>
21 </indexterm>
22
23 <sect2 role="package">
24 <title/>
25
26 <para>The Util-linux-ng package contains miscellaneous utility programs.
27 Among them are utilities for handling file systems, consoles, partitions,
28 and messages.</para>
29
30 <segmentedlist>
31 <segtitle>&buildtime;</segtitle>
32 <segtitle>&diskspace;</segtitle>
33
34 <seglistitem>
35 <seg>&util-linux-ng-ch6-sbu;</seg>
36 <seg>&util-linux-ng-ch6-du;</seg>
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>
51
52<screen><userinput remap="pre">sed -e 's@etc/adjtime@var/lib/hwclock/adjtime@g' \
53 -i $(grep -rl '/etc/adjtime' .)
54mkdir -pv /var/lib/hwclock</userinput></screen>
55
56 </sect2>
57
58 <sect2 role="installation">
59 <title>Installation of Util-linux-ng</title>
60
61<screen><userinput remap="configure">./configure --enable-arch --enable-partx --enable-write</userinput></screen>
62
63 <variablelist>
64 <title>The meaning of the configure options:</title>
65
66 <varlistentry>
67 <term><parameter>--enable-arch</parameter></term>
68 <listitem>
69 <para>Enables building the <command>arch</command> program</para>
70 </listitem>
71 </varlistentry>
72 <varlistentry>
73 <term><parameter>--enable-partx</parameter></term>
74 <listitem>
75 <para>Enables building the <command>addpart</command>,
76 <command>delpart</command> and <command>partx</command>
77 programs</para>
78 </listitem>
79 </varlistentry>
80 <varlistentry>
81 <term><parameter>--enable-write</parameter></term>
82 <listitem>
83 <para>Enables building the <command>write</command> program</para>
84 </listitem>
85 </varlistentry>
86
87 </variablelist>
88
89 <para>Compile the package:</para>
90
91<screen><userinput remap="make">make</userinput></screen>
92
93 <para>This package does not come with a test suite.</para>
94
95 <para>Install the package:</para>
96
97<screen><userinput remap="install">make install</userinput></screen>
98
99 </sect2>
100
101 <sect2 id="contents-utillinux" role="content">
102 <title>Contents of Util-linux-ng</title>
103
104 <segmentedlist>
105 <segtitle>Installed programs</segtitle>
106 <segtitle>Installed libraries</segtitle>
107 <segtitle>Installed directories</segtitle>
108
109 <seglistitem>
110 <seg>addpart, agetty, arch, blkid, blockdev, cal, cfdisk, chkdupexe,
111 chrt, col, colcrt, colrm, column, ctrlaltdel, cytune, ddate, delpart,
112 dmesg, fallocate, fdformat, fdisk, findfs, findmnt, flock, fsck,
113 fsck.cramfs, fsck.minix, fsfreeze, getopt, hexdump, hwclock, i386,
114 ionice, ipcmk, ipcrm, ipcs, isosize, ldattach, line, linux32, linux64,
115 logger, look, losetup, lscpu, mcookie, mkfs, mkfs.bfs, mkfs.cramfs,
116 mkfs.minix, mkswap, more, mount, namei, partx, pg, pivot_root,
117 readprofile, rename, renice, rev, rtcwake, script, scriptreplay,
118 setarch, setsid, setterm, sfdisk, swaplabel, swapoff (link to swapon),
119 swapon, switch_root, tailf, taskset, tunelp, ul, umount, unshare,
120 uuidd, uuidgen, wall, whereis, wipefs, and write</seg>
121 <seg>libblkid.{a,so}, libmount.{a,so}, libuuid.{a,so}</seg>
122 <seg>/usr/share/getopt, /var/lib/hwclock</seg>
123 </seglistitem>
124 </segmentedlist>
125
126 <variablelist>
127 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
128 <?dbfo list-presentation="list"?>
129 <?dbhtml list-presentation="table"?>
130
131 <varlistentry id="addpart">
132 <term><command>addpart</command></term>
133 <listitem>
134 <para>Informs the Linux kernel of new partitions</para>
135 <indexterm zone="ch-system-util-linux-ng addpart">
136 <primary sortas="b-addpart">addpart</primary>
137 </indexterm>
138 </listitem>
139 </varlistentry>
140
141 <varlistentry id="agetty">
142 <term><command>agetty</command></term>
143 <listitem>
144 <para>Opens a tty port, prompts for a login name,
145 and then invokes the <command>login</command> program</para>
146 <indexterm zone="ch-system-util-linux-ng agetty">
147 <primary sortas="b-agetty">agetty</primary>
148 </indexterm>
149 </listitem>
150 </varlistentry>
151
152 <varlistentry id="arch">
153 <term><command>arch</command></term>
154 <listitem>
155 <para>Reports the machine's architecture</para>
156 <indexterm zone="ch-system-util-linux-ng arch">
157 <primary sortas="b-arch">arch</primary>
158 </indexterm>
159 </listitem>
160 </varlistentry>
161
162 <varlistentry id="blkid">
163 <term><command>blkid</command></term>
164 <listitem>
165 <para>A command line utility to locate and print block device
166 attributes</para>
167 <indexterm zone="ch-system-util-linux-ng blkid">
168 <primary sortas="b-blkid">blkid</primary>
169 </indexterm>
170 </listitem>
171 </varlistentry>
172
173 <varlistentry id="blockdev">
174 <term><command>blockdev</command></term>
175 <listitem>
176 <para>Allows users to call block device ioctls from the command
177 line</para>
178 <indexterm zone="ch-system-util-linux-ng blockdev">
179 <primary sortas="b-blockdev">blockdev</primary>
180 </indexterm>
181 </listitem>
182 </varlistentry>
183
184 <varlistentry id="cal">
185 <term><command>cal</command></term>
186 <listitem>
187 <para>Displays a simple calendar</para>
188 <indexterm zone="ch-system-util-linux-ng cal">
189 <primary sortas="b-cal">cal</primary>
190 </indexterm>
191 </listitem>
192 </varlistentry>
193
194 <varlistentry id="cfdisk">
195 <term><command>cfdisk</command></term>
196 <listitem>
197 <para>Manipulates the partition table of the given device</para>
198 <indexterm zone="ch-system-util-linux-ng cfdisk">
199 <primary sortas="b-cfdisk">cfdisk</primary>
200 </indexterm>
201 </listitem>
202 </varlistentry>
203
204 <varlistentry id="chkdupexe">
205 <term><command>chkdupexe</command></term>
206 <listitem>
207 <para>Finds duplicate executables</para>
208 <indexterm zone="ch-system-util-linux-ng chkdupexe">
209 <primary sortas="b-chkdupexe">chkdupexe</primary>
210 </indexterm>
211 </listitem>
212 </varlistentry>
213
214 <varlistentry id="chrt">
215 <term><command>chrt</command></term>
216 <listitem>
217 <para>Manipulates real-time attributes of a process</para>
218 <indexterm zone="ch-system-util-linux-ng chrt">
219 <primary sortas="b-chrt">chrt</primary>
220 </indexterm>
221 </listitem>
222 </varlistentry>
223
224 <varlistentry id="col">
225 <term><command>col</command></term>
226 <listitem>
227 <para>Filters out reverse line feeds</para>
228 <indexterm zone="ch-system-util-linux-ng col">
229 <primary sortas="b-col">col</primary>
230 </indexterm>
231 </listitem>
232 </varlistentry>
233
234 <varlistentry id="colcrt">
235 <term><command>colcrt</command></term>
236 <listitem>
237 <para>Filters <command>nroff</command> output for terminals
238 that lack some capabilities, such as overstriking and half-lines</para>
239 <indexterm zone="ch-system-util-linux-ng colcrt">
240 <primary sortas="b-colcrt">colcrt</primary>
241 </indexterm>
242 </listitem>
243 </varlistentry>
244
245 <varlistentry id="colrm">
246 <term><command>colrm</command></term>
247 <listitem>
248 <para>Filters out the given columns</para>
249 <indexterm zone="ch-system-util-linux-ng colrm">
250 <primary sortas="b-colrm">colrm</primary>
251 </indexterm>
252 </listitem>
253 </varlistentry>
254
255 <varlistentry id="column">
256 <term><command>column</command></term>
257 <listitem>
258 <para>Formats a given file into multiple columns</para>
259 <indexterm zone="ch-system-util-linux-ng column">
260 <primary sortas="b-column">column</primary>
261 </indexterm>
262 </listitem>
263 </varlistentry>
264
265 <varlistentry id="ctrlaltdel">
266 <term><command>ctrlaltdel</command></term>
267 <listitem>
268 <para>Sets the function of the Ctrl+Alt+Del key combination to a
269 hard or a soft reset</para>
270 <indexterm zone="ch-system-util-linux-ng ctrlaltdel">
271 <primary sortas="b-ctrlaltdel">ctrlaltdel</primary>
272 </indexterm>
273 </listitem>
274 </varlistentry>
275
276 <varlistentry id="cytune">
277 <term><command>cytune</command></term>
278 <listitem>
279 <para>Tunes the parameters of the serial line drivers for
280 Cyclades cards</para>
281 <indexterm zone="ch-system-util-linux-ng cytune">
282 <primary sortas="b-cytune">cytune</primary>
283 </indexterm>
284 </listitem>
285 </varlistentry>
286
287 <varlistentry id="ddate">
288 <term><command>ddate</command></term>
289 <listitem>
290 <para>Gives the Discordian date or converts the given Gregorian date
291 to a Discordian one</para>
292 <indexterm zone="ch-system-util-linux-ng ddate">
293 <primary sortas="b-ddate">ddate</primary>
294 </indexterm>
295 </listitem>
296 </varlistentry>
297
298 <varlistentry id="delpart">
299 <term><command>delpart</command></term>
300 <listitem>
301 <para>Asks the Linux kernel to remove a partition</para>
302 <indexterm zone="ch-system-util-linux-ng delpart">
303 <primary sortas="b-delpart">delpart</primary>
304 </indexterm>
305 </listitem>
306 </varlistentry>
307
308 <varlistentry id="dmesg">
309 <term><command>dmesg</command></term>
310 <listitem>
311 <para>Dumps the kernel boot messages</para>
312 <indexterm zone="ch-system-util-linux-ng dmesg">
313 <primary sortas="b-dmesg">dmesg</primary>
314 </indexterm>
315 </listitem>
316 </varlistentry>
317
318 <varlistentry id="fallocate">
319 <term><command>fallocate</command></term>
320 <listitem>
321 <para>Preallocates space to a file</para>
322 <indexterm zone="ch-system-util-linux-ng fallocate">
323 <primary sortas="b-fallocate">fallocate</primary>
324 </indexterm>
325 </listitem>
326 </varlistentry>
327
328 <varlistentry id="fdformat">
329 <term><command>fdformat</command></term>
330 <listitem>
331 <para>Low-level formats a floppy disk</para>
332 <indexterm zone="ch-system-util-linux-ng fdformat">
333 <primary sortas="b-fdformat">fdformat</primary>
334 </indexterm>
335 </listitem>
336 </varlistentry>
337
338 <varlistentry id="fdisk">
339 <term><command>fdisk</command></term>
340 <listitem>
341 <para>Manipulates the paritition table of the given device</para>
342 <indexterm zone="ch-system-util-linux-ng fdisk">
343 <primary sortas="b-fdisk">fdisk</primary>
344 </indexterm>
345 </listitem>
346 </varlistentry>
347
348 <varlistentry id="findfs">
349 <term><command>findfs</command></term>
350 <listitem>
351 <para>Finds a file system by label or Universally Unique Identifier
352 (UUID)</para>
353 <indexterm zone="ch-system-util-linux-ng findfs">
354 <primary sortas="b-findfs">findfs</primary>
355 </indexterm>
356 </listitem>
357 </varlistentry>
358
359 <varlistentry id="findmnt">
360 <term><command>findmnt</command></term>
361 <listitem>
362 <para>Is a command line interface to the libmount library
363 for work with mountinfo, fstab and mtab files</para>
364 <indexterm zone="ch-system-util-linux-ng findmnt">
365 <primary sortas="b-findmnt">findmnt</primary>
366 </indexterm>
367 </listitem>
368 </varlistentry>
369
370 <varlistentry id="flock">
371 <term><command>flock</command></term>
372 <listitem>
373 <para>Acquires a file lock and then executes a command with the lock
374 held</para>
375 <indexterm zone="ch-system-util-linux-ng flock">
376 <primary sortas="b-flock">flock</primary>
377 </indexterm>
378 </listitem>
379 </varlistentry>
380
381 <varlistentry id="fsck">
382 <term><command>fsck</command></term>
383 <listitem>
384 <para>Is used to check, and optionally repair, file systems</para>
385 <indexterm zone="ch-system-util-linux-ng fsck">
386 <primary sortas="b-fsck">fsck</primary>
387 </indexterm>
388 </listitem>
389 </varlistentry>
390
391 <varlistentry id="fsck.cramfs">
392 <term><command>fsck.cramfs</command></term>
393 <listitem>
394 <para>Performs a consistency check on the Cramfs file system on the
395 given device</para>
396 <indexterm zone="ch-system-util-linux-ng fsck.cramfs">
397 <primary sortas="b-fsck.cramfs">fsck.cramfs</primary>
398 </indexterm>
399 </listitem>
400 </varlistentry>
401
402 <varlistentry id="fsck.minix">
403 <term><command>fsck.minix</command></term>
404 <listitem>
405 <para>Performs a consistency check on the Minix file system on the
406 given device</para>
407 <indexterm zone="ch-system-util-linux-ng fsck.minix">
408 <primary sortas="b-fsck.minix">fsck.minix</primary>
409 </indexterm>
410 </listitem>
411 </varlistentry>
412
413 <varlistentry id="fsfreeze">
414 <term><command>fsfreeze</command></term>
415 <listitem>
416 <para>Is a very simple wrapper around FIFREEZE/FITHAW ioctl
417 kernel driver operations</para>
418 <indexterm zone="ch-system-util-linux-ng fsfreeze">
419 <primary sortas="b-fsfreeze">fsfreeze</primary>
420 </indexterm>
421 </listitem>
422 </varlistentry>
423
424 <varlistentry id="getopt">
425 <term><command>getopt</command></term>
426 <listitem>
427 <para>Parses options in the given command line</para>
428 <indexterm zone="ch-system-util-linux-ng getopt">
429 <primary sortas="b-getopt">getopt</primary>
430 </indexterm>
431 </listitem>
432 </varlistentry>
433
434 <varlistentry id="hexdump">
435 <term><command>hexdump</command></term>
436 <listitem>
437 <para>Dumps the given file in hexadecimal or in another given
438 format</para>
439 <indexterm zone="ch-system-util-linux-ng hexdump">
440 <primary sortas="b-hexdump">hexdump</primary>
441 </indexterm>
442 </listitem>
443 </varlistentry>
444
445 <varlistentry id="hwclock">
446 <term><command>hwclock</command></term>
447 <listitem>
448 <para>Reads or sets the system's hardware clock, also called
449 the Real-Time Clock (RTC) or Basic Input-Output System (BIOS)
450 clock</para>
451 <indexterm zone="ch-system-util-linux-ng hwclock">
452 <primary sortas="b-hwclock">hwclock</primary>
453 </indexterm>
454 </listitem>
455 </varlistentry>
456
457 <varlistentry id="i386">
458 <term><command>i386</command></term>
459 <listitem>
460 <para>A symbolic link to setarch</para>
461 <indexterm zone="ch-system-util-linux-ng i386">
462 <primary sortas="b-i386">i386</primary>
463 </indexterm>
464 </listitem>
465 </varlistentry>
466
467 <varlistentry id="ionice">
468 <term><command>ionice</command></term>
469 <listitem>
470 <para>Gets or sets the io scheduling class and priority for a program</para>
471 <indexterm zone="ch-system-util-linux-ng ionice">
472 <primary sortas="b-ionice">ionice</primary>
473 </indexterm>
474 </listitem>
475 </varlistentry>
476
477 <varlistentry id="ipcmk">
478 <term><command>ipcmk</command></term>
479 <listitem>
480 <para>Creates various IPC resources</para>
481 <indexterm zone="ch-system-util-linux-ng ipcmk">
482 <primary sortas="b-ipcmk">ipcmk</primary>
483 </indexterm>
484 </listitem>
485 </varlistentry>
486
487 <varlistentry id="ipcrm">
488 <term><command>ipcrm</command></term>
489 <listitem>
490 <para>Removes the given Inter-Process Communication (IPC) resource</para>
491 <indexterm zone="ch-system-util-linux-ng ipcrm">
492 <primary sortas="b-ipcrm">ipcrm</primary>
493 </indexterm>
494 </listitem>
495 </varlistentry>
496
497 <varlistentry id="ipcs">
498 <term><command>ipcs</command></term>
499 <listitem>
500 <para>Provides IPC status information</para>
501 <indexterm zone="ch-system-util-linux-ng ipcs">
502 <primary sortas="b-ipcs">ipcs</primary>
503 </indexterm>
504 </listitem>
505 </varlistentry>
506
507 <varlistentry id="isosize">
508 <term><command>isosize</command></term>
509 <listitem>
510 <para>Reports the size of an iso9660 file system</para>
511 <indexterm zone="ch-system-util-linux-ng isosize">
512 <primary sortas="b-isosize">isosize</primary>
513 </indexterm>
514 </listitem>
515 </varlistentry>
516
517 <varlistentry id="ldattach">
518 <term><command>ldattach</command></term>
519 <listitem>
520 <para>Attaches a line discipline to a serial line</para>
521 <indexterm zone="ch-system-util-linux-ng ldattach">
522 <primary sortas="b-ldattach">ldattach</primary>
523 </indexterm>
524 </listitem>
525 </varlistentry>
526
527 <varlistentry id="line">
528 <term><command>line</command></term>
529 <listitem>
530 <para>Copies a single line</para>
531 <indexterm zone="ch-system-util-linux-ng line">
532 <primary sortas="b-line">line</primary>
533 </indexterm>
534 </listitem>
535 </varlistentry>
536
537 <varlistentry id="linux32">
538 <term><command>linux32</command></term>
539 <listitem>
540 <para>A symbolic link to setarch</para>
541 <indexterm zone="ch-system-util-linux-ng linux32">
542 <primary sortas="b-linux32">linux32</primary>
543 </indexterm>
544 </listitem>
545 </varlistentry>
546
547 <varlistentry id="linux64">
548 <term><command>linux64</command></term>
549 <listitem>
550 <para>A symbolic link to setarch</para>
551 <indexterm zone="ch-system-util-linux-ng linux64">
552 <primary sortas="b-linux64">linux64</primary>
553 </indexterm>
554 </listitem>
555 </varlistentry>
556
557 <varlistentry id="logger">
558 <term><command>logger</command></term>
559 <listitem>
560 <para>Enters the given message into the system log</para>
561 <indexterm zone="ch-system-util-linux-ng logger">
562 <primary sortas="b-logger">logger</primary>
563 </indexterm>
564 </listitem>
565 </varlistentry>
566
567 <varlistentry id="look">
568 <term><command>look</command></term>
569 <listitem>
570 <para>Displays lines that begin with the given string</para>
571 <indexterm zone="ch-system-util-linux-ng look">
572 <primary sortas="b-look">look</primary>
573 </indexterm>
574 </listitem>
575 </varlistentry>
576
577 <varlistentry id="losetup">
578 <term><command>losetup</command></term>
579 <listitem>
580 <para>Sets up and controls loop devices</para>
581 <indexterm zone="ch-system-util-linux-ng losetup">
582 <primary sortas="b-losetup">losetup</primary>
583 </indexterm>
584 </listitem>
585 </varlistentry>
586
587 <varlistentry id="lscpu">
588 <term><command>lscpu</command></term>
589 <listitem>
590 <para>Prints CPU architechture information</para>
591 <indexterm zone="ch-system-util-linux-ng lscpu">
592 <primary sortas="b-lscpu">lscpu</primary>
593 </indexterm>
594 </listitem>
595 </varlistentry>
596
597 <varlistentry id="mcookie">
598 <term><command>mcookie</command></term>
599 <listitem>
600 <para>Generates magic cookies (128-bit random hexadecimal numbers) for
601 <command>xauth</command></para>
602 <indexterm zone="ch-system-util-linux-ng mcookie">
603 <primary sortas="b-mcookie">mcookie</primary>
604 </indexterm>
605 </listitem>
606 </varlistentry>
607
608 <varlistentry id="mkfs">
609 <term><command>mkfs</command></term>
610 <listitem>
611 <para>Builds a file system on a device (usually a hard disk
612 partition)</para>
613 <indexterm zone="ch-system-util-linux-ng mkfs">
614 <primary sortas="b-mkfs">mkfs</primary>
615 </indexterm>
616 </listitem>
617 </varlistentry>
618
619 <varlistentry id="mkfs.bfs">
620 <term><command>mkfs.bfs</command></term>
621 <listitem>
622 <para>Creates a Santa Cruz Operations (SCO) bfs file system</para>
623 <indexterm zone="ch-system-util-linux-ng mkfs.bfs">
624 <primary sortas="b-mkfs.bfs">mkfs.bfs</primary>
625 </indexterm>
626 </listitem>
627 </varlistentry>
628
629 <varlistentry id="mkfs.cramfs">
630 <term><command>mkfs.cramfs</command></term>
631 <listitem>
632 <para>Creates a cramfs file system</para>
633 <indexterm zone="ch-system-util-linux-ng mkfs.cramfs">
634 <primary sortas="b-mkfs.cramfs">mkfs.cramfs</primary>
635 </indexterm>
636 </listitem>
637 </varlistentry>
638
639 <varlistentry id="mkfs.minix">
640 <term><command>mkfs.minix</command></term>
641 <listitem>
642 <para>Creates a Minix file system</para>
643 <indexterm zone="ch-system-util-linux-ng mkfs.minix">
644 <primary sortas="b-mkfs.minix">mkfs.minix</primary>
645 </indexterm>
646 </listitem>
647 </varlistentry>
648
649 <varlistentry id="mkswap">
650 <term><command>mkswap</command></term>
651 <listitem>
652 <para>Initializes the given device or file to be used as a swap
653 area</para>
654 <indexterm zone="ch-system-util-linux-ng mkswap">
655 <primary sortas="b-mkswap">mkswap</primary>
656 </indexterm>
657 </listitem>
658 </varlistentry>
659
660 <varlistentry id="more">
661 <term><command>more</command></term>
662 <listitem>
663 <para>A filter for paging through text one screen at a time</para>
664 <indexterm zone="ch-system-util-linux-ng more">
665 <primary sortas="b-more">more</primary>
666 </indexterm>
667 </listitem>
668 </varlistentry>
669
670 <varlistentry id="mount">
671 <term><command>mount</command></term>
672 <listitem>
673 <para>Attaches the file system on the given device to a specified
674 directory in the file-system tree</para>
675 <indexterm zone="ch-system-util-linux-ng mount">
676 <primary sortas="b-mount">mount</primary>
677 </indexterm>
678 </listitem>
679 </varlistentry>
680
681 <varlistentry id="namei">
682 <term><command>namei</command></term>
683 <listitem>
684 <para>Shows the symbolic links in the given pathnames</para>
685 <indexterm zone="ch-system-util-linux-ng namei">
686 <primary sortas="b-namei">namei</primary>
687 </indexterm>
688 </listitem>
689 </varlistentry>
690
691 <varlistentry id="partx">
692 <term><command>partx</command></term>
693 <listitem>
694 <para>Tells the kernel about the presence and numbering of on-disk
695 partitions</para>
696 <indexterm zone="ch-system-util-linux-ng partx">
697 <primary sortas="b-partx">partx</primary>
698 </indexterm>
699 </listitem>
700 </varlistentry>
701
702 <varlistentry id="pg">
703 <term><command>pg</command></term>
704 <listitem>
705 <para>Displays a text file one screen full at a time</para>
706 <indexterm zone="ch-system-util-linux-ng pg">
707 <primary sortas="b-pg">pg</primary>
708 </indexterm>
709 </listitem>
710 </varlistentry>
711
712 <varlistentry id="pivot_root">
713 <term><command>pivot_root</command></term>
714 <listitem>
715 <para>Makes the given file system the new root file system of the
716 current process</para>
717 <indexterm zone="ch-system-util-linux-ng pivot_root">
718 <primary sortas="b-pivot_root">pivot_root</primary>
719 </indexterm>
720 </listitem>
721 </varlistentry>
722
723 <varlistentry id="readprofile">
724 <term><command>readprofile</command></term>
725 <listitem>
726 <para>Reads kernel profiling information</para>
727 <indexterm zone="ch-system-util-linux-ng readprofile">
728 <primary sortas="b-readprofile">readprofile</primary>
729 </indexterm>
730 </listitem>
731 </varlistentry>
732
733 <varlistentry id="rename">
734 <term><command>rename</command></term>
735 <listitem>
736 <para>Renames the given files, replacing a given string with
737 another</para>
738 <indexterm zone="ch-system-util-linux-ng rename">
739 <primary sortas="b-rename">rename</primary>
740 </indexterm>
741 </listitem>
742 </varlistentry>
743
744 <varlistentry id="renice">
745 <term><command>renice</command></term>
746 <listitem>
747 <para>Alters the priority of running processes</para>
748 <indexterm zone="ch-system-util-linux-ng renice">
749 <primary sortas="b-renice">renice</primary>
750 </indexterm>
751 </listitem>
752 </varlistentry>
753
754 <varlistentry id="rev">
755 <term><command>rev</command></term>
756 <listitem>
757 <para>Reverses the lines of a given file</para>
758 <indexterm zone="ch-system-util-linux-ng rev">
759 <primary sortas="b-rev">rev</primary>
760 </indexterm>
761 </listitem>
762 </varlistentry>
763
764 <varlistentry id="rtcwake">
765 <term><command>rtcwake</command></term>
766 <listitem>
767 <para>Used to enter a system sleep state until specified wakeup
768 time</para>
769 <indexterm zone="ch-system-util-linux-ng rtcwake">
770 <primary sortas="b-rtcwake">rtcwake</primary>
771 </indexterm>
772 </listitem>
773 </varlistentry>
774
775 <varlistentry id="script">
776 <term><command>script</command></term>
777 <listitem>
778 <para>Makes a typescript of a terminal session</para>
779 <indexterm zone="ch-system-util-linux-ng script">
780 <primary sortas="b-script">script</primary>
781 </indexterm>
782 </listitem>
783 </varlistentry>
784
785 <varlistentry id="scriptreplay">
786 <term><command>scriptreplay</command></term>
787 <listitem>
788 <para>Plays back typescripts using timing information</para>
789 <indexterm zone="ch-system-util-linux-ng scriptreplay">
790 <primary sortas="b-scriptreplay">scriptreplay</primary>
791 </indexterm>
792 </listitem>
793 </varlistentry>
794
795 <varlistentry id="setarch">
796 <term><command>setarch</command></term>
797 <listitem>
798 <para>Changes reported architecture in a new program environment and
799 sets personality flags</para>
800 <indexterm zone="ch-system-util-linux-ng setarch">
801 <primary sortas="b-setarch">setarch</primary>
802 </indexterm>
803 </listitem>
804 </varlistentry>
805
806 <varlistentry id="setsid">
807 <term><command>setsid</command></term>
808 <listitem>
809 <para>Runs the given program in a new session</para>
810 <indexterm zone="ch-system-util-linux-ng setsid">
811 <primary sortas="b-setsid">setsid</primary>
812 </indexterm>
813 </listitem>
814 </varlistentry>
815
816 <varlistentry id="setterm">
817 <term><command>setterm</command></term>
818 <listitem>
819 <para>Sets terminal attributes</para>
820 <indexterm zone="ch-system-util-linux-ng setterm">
821 <primary sortas="b-setterm">setterm</primary>
822 </indexterm>
823 </listitem>
824 </varlistentry>
825
826 <varlistentry id="sfdisk">
827 <term><command>sfdisk</command></term>
828 <listitem>
829 <para>A disk partition table manipulator</para>
830 <indexterm zone="ch-system-util-linux-ng sfdisk">
831 <primary sortas="b-sfdisk">sfdisk</primary>
832 </indexterm>
833 </listitem>
834 </varlistentry>
835
836 <varlistentry id="swaplabel">
837 <term><command>swaplabel</command></term>
838 <listitem>
839 <para>Allows to change swaparea UUID and label</para>
840 <indexterm zone="ch-system-util-linux-ng swaplabel">
841 <primary sortas="b-swaplabel">swaplabel</primary>
842 </indexterm>
843 </listitem>
844 </varlistentry>
845
846 <varlistentry id="swapoff">
847 <term><command>swapoff</command></term>
848 <listitem>
849 <para>Disables devices and files for paging and swapping</para>
850 <indexterm zone="ch-system-util-linux-ng swapoff">
851 <primary sortas="b-swapoff">swapoff</primary>
852 </indexterm>
853 </listitem>
854 </varlistentry>
855
856 <varlistentry id="swapon">
857 <term><command>swapon</command></term>
858 <listitem>
859 <para>Enables devices and files for paging and swapping and
860 lists the devices and files currently in use</para>
861 <indexterm zone="ch-system-util-linux-ng swapon">
862 <primary sortas="b-swapon">swapon</primary>
863 </indexterm>
864 </listitem>
865 </varlistentry>
866
867 <varlistentry id="switch_root">
868 <term><command>switch_root</command></term>
869 <listitem>
870 <para>Switches to another filesystem as the root of the mount tree</para>
871 <indexterm zone="ch-system-util-linux-ng switch_root">
872 <primary sortas="b-switch_root">switch_root</primary>
873 </indexterm>
874 </listitem>
875 </varlistentry>
876
877 <varlistentry id="tailf">
878 <term><command>tailf</command></term>
879 <listitem>
880 <para>Tracks the growth of a log file. Displays the last 10 lines
881 of a log file, then continues displaying any new entries in the
882 log file as they are created</para>
883 <indexterm zone="ch-system-util-linux-ng tailf">
884 <primary sortas="b-tailf">tailf</primary>
885 </indexterm>
886 </listitem>
887 </varlistentry>
888
889 <varlistentry id="taskset">
890 <term><command>taskset</command></term>
891 <listitem>
892 <para>Retrieves or sets a process' CPU affinity</para>
893 <indexterm zone="ch-system-util-linux-ng taskset">
894 <primary sortas="b-taskset">taskset</primary>
895 </indexterm>
896 </listitem>
897 </varlistentry>
898
899 <varlistentry id="tunelp">
900 <term><command>tunelp</command></term>
901 <listitem>
902 <para>Tunes the parameters of the line printer</para>
903 <indexterm zone="ch-system-util-linux-ng tunelp">
904 <primary sortas="b-tunelp">tunelp</primary>
905 </indexterm>
906 </listitem>
907 </varlistentry>
908
909 <varlistentry id="ul">
910 <term><command>ul</command></term>
911 <listitem>
912 <para>A filter for translating underscores into escape sequences
913 indicating underlining for the terminal in use</para>
914 <indexterm zone="ch-system-util-linux-ng ul">
915 <primary sortas="b-ul">ul</primary>
916 </indexterm>
917 </listitem>
918 </varlistentry>
919
920 <varlistentry id="umount">
921 <term><command>umount</command></term>
922 <listitem>
923 <para>Disconnects a file system from the system's file tree</para>
924 <indexterm zone="ch-system-util-linux-ng umount">
925 <primary sortas="b-umount">umount</primary>
926 </indexterm>
927 </listitem>
928 </varlistentry>
929
930 <varlistentry id="unshare">
931 <term><command>unshare</command></term>
932 <listitem>
933 <para>Runs a program with some namespaces unshared from parent</para>
934 <indexterm zone="ch-system-util-linux-ng unshare">
935 <primary sortas="b-unshare">unshare</primary>
936 </indexterm>
937 </listitem>
938 </varlistentry>
939
940 <varlistentry id="uuidd">
941 <term><command>uuidd</command></term>
942 <listitem>
943 <para>A daemon used by the UUID library to generate time-based
944 UUIDs in a secure and guranteed-unique fashion.</para>
945 <indexterm zone="ch-system-util-linux-ng uuidd">
946 <primary sortas="b-uuidd">uuidd</primary>
947 </indexterm>
948 </listitem>
949 </varlistentry>
950
951 <varlistentry id="uuidgen">
952 <term><command>uuidgen</command></term>
953 <listitem>
954 <para>Creates new UUIDs. Each new UUID can reasonably be considered
955 unique among all UUIDs created, on the local system and on other
956 systems, in the past and in the future</para>
957 <indexterm zone="ch-system-util-linux-ng uuidgen">
958 <primary sortas="b-uuidgen">uuidgen</primary>
959 </indexterm>
960 </listitem>
961 </varlistentry>
962
963 <varlistentry id="wall">
964 <term><command>wall</command></term>
965 <listitem>
966 <para>Displays the contents of a file or, by default, its standard
967 input, on the terminals of all currently logged in users</para>
968 <indexterm zone="ch-system-util-linux-ng wall">
969 <primary sortas="b-wall">wall</primary>
970 </indexterm>
971 </listitem>
972 </varlistentry>
973
974 <varlistentry id="whereis">
975 <term><command>whereis</command></term>
976 <listitem>
977 <para>Reports the location of the binary, source, and man page
978 for the given command</para>
979 <indexterm zone="ch-system-util-linux-ng whereis">
980 <primary sortas="b-whereis">whereis</primary>
981 </indexterm>
982 </listitem>
983 </varlistentry>
984
985 <varlistentry id="wipefs">
986 <term><command>wipefs</command></term>
987 <listitem>
988 <para>Wipes a filesystem signature from a device</para>
989 <indexterm zone="ch-system-util-linux-ng wipefs">
990 <primary sortas="b-wipefs">wipefs</primary>
991 </indexterm>
992 </listitem>
993 </varlistentry>
994
995 <varlistentry id="write">
996 <term><command>write</command></term>
997 <listitem>
998 <para>Sends a message to the given user <emphasis>if</emphasis> that
999 user has not disabled receipt of such messages</para>
1000 <indexterm zone="ch-system-util-linux-ng write">
1001 <primary sortas="b-write">write</primary>
1002 </indexterm>
1003 </listitem>
1004 </varlistentry>
1005
1006 <varlistentry id="libblkid">
1007 <term><filename class="libraryfile">libblkid</filename></term>
1008 <listitem>
1009 <para>Contains routines for device identification and token
1010 extraction</para>
1011 <indexterm zone="ch-system-util-linux-ng libblkid">
1012 <primary sortas="c-libblkid">libblkid</primary>
1013 </indexterm>
1014 </listitem>
1015 </varlistentry>
1016
1017 <varlistentry id="libuuid">
1018 <term><filename class="libraryfile">libuuid</filename></term>
1019 <listitem>
1020 <para>Contains routines for generating unique identifiers for objects
1021 that may be accessible beyond the local system</para>
1022 <indexterm zone="ch-system-util-linux-ng libuuid">
1023 <primary sortas="c-libuuid">libuuid</primary>
1024 </indexterm>
1025 </listitem>
1026 </varlistentry>
1027
1028 </variablelist>
1029
1030 </sect2>
1031
1032</sect1>
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