source: chapter06/util-linux.xml@ 3b66f6a

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Last change on this file since 3b66f6a was 3b66f6a, checked in by Bruce Dubbs <bdubbs@…>, 10 years ago

Update to man-pages-3.72
Add upstream patches to gcc
Update to linux-3.16.2
Update to util-linux-2.25.1
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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" role="wrap">
9 <?dbhtml filename="util-linux.html"?>
10
11 <sect1info condition="script">
12 <productname>util-linux</productname>
13 <productnumber>&util-linux-version;</productnumber>
14 <address>&util-linux-url;</address>
15 </sect1info>
16
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.
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-ch6-sbu;</seg>
36 <seg>&util-linux-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. First create a directory
49 to enable storage for the <command>hwclock</command> program:</para>
50
51<screen><userinput remap="pre">mkdir -pv /var/lib/hwclock</userinput></screen>
52
53 </sect2>
54
55 <sect2 role="installation">
56 <title>Installation of Util-linux</title>
57
58 <para>First, fix one of the regression tests:</para>
59
60<screen><userinput remap="pre">sed -e 's/2^64/(2^64/' -e 's/E &lt;/E) &lt;=/' -e 's/ne /eq /' \
61 -i tests/ts/ipcs/limits2</userinput></screen>
62
63 <para>Prepare Util-linux for compilation:</para>
64
65<screen><userinput remap="configure">./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
66 --docdir=/usr/share/doc/util-linx-&util-linux-version;</userinput></screen>
67
68 <para>Compile the package:</para>
69
70<screen><userinput remap="make">make</userinput></screen>
71
72 <para>If desired, run the test suite as a non-root user:</para>
73
74 <warning><para>Running the test suite as the root user can be harmful to
75 your system. To run it, the CONFIG_SCSI_DEBUG option for the kernel must
76 be available in the currently running system, and must be built as a
77 module. Building it into the kernel will prevent booting. For complete
78 coverage, other BLFS packages must be installed. If desired, this test can
79 be run after rebooting into the completed LFS system and running:</para>
80
81 <screen role="nodump"><userinput>bash tests/run.sh --srcdir=$PWD --builddir=$PWD</userinput></screen>
82 </warning>
83
84 <screen><userinput remap="test">chown -Rv nobody .
85su nobody -s /bin/bash -c "PATH=$PATH make -k check"</userinput></screen>
86
87 <note><para>One test above, tests/ts/ipcs/limits2, will fail when the host
88 is using a recent kernel. The failure can safely be ignored.</para></note>
89
90 <para>Install the package:</para>
91
92<screen><userinput remap="install">make install</userinput></screen>
93
94 </sect2>
95
96 <sect2 id="contents-utillinux" role="content">
97 <title>Contents of Util-linux</title>
98
99 <segmentedlist>
100 <segtitle>Installed programs</segtitle>
101 <segtitle>Installed libraries</segtitle>
102 <segtitle>Installed directories</segtitle>
103
104 <seglistitem>
105 <seg>addpart, agetty, blkdiscard, blkid, blockdev, cal, cfdisk, chcpu,
106 chrt, col, colcrt, colrm, column, ctrlaltdel, delpart, dmesg,
107 eject, fallocate, fdformat, fdisk, findfs, findmnt, flock, fsck,
108 fsck.cramfs, fsck.minix, fsfreeze, fstrim, getopt, hexdump, hwclock,
109 i386, ionice, ipcmk, ipcrm, ipcs, isosize, kill, last, lastb (link to
110 last), ldattach, linux32, linux64, logger, look, losetup, lsblk, lscpu,
111 lslocks, lslogins, mcookie, mkfs, mkfs.bfs, mkfs.cramfs, mkfs.minix, mkswap,
112 more, mount, mountpoint, namei, partx, pg, pivot_root, prlimit, raw,
113 readprofile, rename, renice, resizepart, rev, rtcwake, script,
114 scriptreplay, setarch, setsid, setterm, sfdisk, sulogin, swaplabel,
115 swapoff (link to swapon), swapon, switch_root, tailf, taskset, ul,
116 umount, unshare, utmpdump, uuidd, uuidgen, wall, wdctl, whereis,
117 wipefs, and x86_64</seg>
118
119 <seg>libblkid.{a,so}, libmount.{a,so}, libuuid.{a,so}</seg>
120
121 <seg>/etc/terminal-colors.d, /usr/include/blkid, /usr/include/libmount,
122 /usr/include/uuid, /usr/share/doc/util-linux-&util-linux-version;/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 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 agetty">
147 <primary sortas="b-agetty">agetty</primary>
148 </indexterm>
149 </listitem>
150 </varlistentry>
151
152 <varlistentry id="blkdiscard">
153 <term><command>blkdiscard</command></term>
154 <listitem>
155 <para>Discards sectors on a device</para>
156 <indexterm zone="ch-system-util-linux blkdiscard">
157 <primary sortas="b-blkdiscard">blkdiscard</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 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 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 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 cfdisk">
199 <primary sortas="b-cfdisk">cfdisk</primary>
200 </indexterm>
201 </listitem>
202 </varlistentry>
203
204 <varlistentry id="chcpu">
205 <term><command>chcpu</command></term>
206 <listitem>
207 <para>Modifies the state of CPUs</para>
208 <indexterm zone="ch-system-util-linux chcpu">
209 <primary sortas="b-chcpu">chcpu</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 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 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 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 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 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 ctrlaltdel">
271 <primary sortas="b-ctrlaltdel">ctrlaltdel</primary>
272 </indexterm>
273 </listitem>
274 </varlistentry>
275
276 <varlistentry id="delpart">
277 <term><command>delpart</command></term>
278 <listitem>
279 <para>Asks the Linux kernel to remove a partition</para>
280 <indexterm zone="ch-system-util-linux delpart">
281 <primary sortas="b-delpart">delpart</primary>
282 </indexterm>
283 </listitem>
284 </varlistentry>
285
286 <varlistentry id="dmesg">
287 <term><command>dmesg</command></term>
288 <listitem>
289 <para>Dumps the kernel boot messages</para>
290 <indexterm zone="ch-system-util-linux dmesg">
291 <primary sortas="b-dmesg">dmesg</primary>
292 </indexterm>
293 </listitem>
294 </varlistentry>
295
296 <varlistentry id="eject">
297 <term><command>eject</command></term>
298 <listitem>
299 <para>Ejects removable media</para>
300 <indexterm zone="ch-system-util-linux eject">
301 <primary sortas="b-eject">eject</primary>
302 </indexterm>
303 </listitem>
304 </varlistentry>
305
306 <varlistentry id="fallocate">
307 <term><command>fallocate</command></term>
308 <listitem>
309 <para>Preallocates space to a file</para>
310 <indexterm zone="ch-system-util-linux fallocate">
311 <primary sortas="b-fallocate">fallocate</primary>
312 </indexterm>
313 </listitem>
314 </varlistentry>
315
316 <varlistentry id="fdformat">
317 <term><command>fdformat</command></term>
318 <listitem>
319 <para>Low-level formats a floppy disk</para>
320 <indexterm zone="ch-system-util-linux fdformat">
321 <primary sortas="b-fdformat">fdformat</primary>
322 </indexterm>
323 </listitem>
324 </varlistentry>
325
326 <varlistentry id="fdisk">
327 <term><command>fdisk</command></term>
328 <listitem>
329 <para>Manipulates the paritition table of the given device</para>
330 <indexterm zone="ch-system-util-linux fdisk">
331 <primary sortas="b-fdisk">fdisk</primary>
332 </indexterm>
333 </listitem>
334 </varlistentry>
335
336 <varlistentry id="findfs">
337 <term><command>findfs</command></term>
338 <listitem>
339 <para>Finds a file system by label or Universally Unique Identifier
340 (UUID)</para>
341 <indexterm zone="ch-system-util-linux findfs">
342 <primary sortas="b-findfs">findfs</primary>
343 </indexterm>
344 </listitem>
345 </varlistentry>
346
347 <varlistentry id="findmnt">
348 <term><command>findmnt</command></term>
349 <listitem>
350 <para>Is a command line interface to the libmount library
351 for work with mountinfo, fstab and mtab files</para>
352 <indexterm zone="ch-system-util-linux findmnt">
353 <primary sortas="b-findmnt">findmnt</primary>
354 </indexterm>
355 </listitem>
356 </varlistentry>
357
358 <varlistentry id="flock">
359 <term><command>flock</command></term>
360 <listitem>
361 <para>Acquires a file lock and then executes a command with the lock
362 held</para>
363 <indexterm zone="ch-system-util-linux flock">
364 <primary sortas="b-flock">flock</primary>
365 </indexterm>
366 </listitem>
367 </varlistentry>
368
369 <varlistentry id="fsck">
370 <term><command>fsck</command></term>
371 <listitem>
372 <para>Is used to check, and optionally repair, file systems</para>
373 <indexterm zone="ch-system-util-linux fsck">
374 <primary sortas="b-fsck">fsck</primary>
375 </indexterm>
376 </listitem>
377 </varlistentry>
378
379 <varlistentry id="fsck.cramfs">
380 <term><command>fsck.cramfs</command></term>
381 <listitem>
382 <para>Performs a consistency check on the Cramfs file system on the
383 given device</para>
384 <indexterm zone="ch-system-util-linux fsck.cramfs">
385 <primary sortas="b-fsck.cramfs">fsck.cramfs</primary>
386 </indexterm>
387 </listitem>
388 </varlistentry>
389
390 <varlistentry id="fsck.minix">
391 <term><command>fsck.minix</command></term>
392 <listitem>
393 <para>Performs a consistency check on the Minix file system on the
394 given device</para>
395 <indexterm zone="ch-system-util-linux fsck.minix">
396 <primary sortas="b-fsck.minix">fsck.minix</primary>
397 </indexterm>
398 </listitem>
399 </varlistentry>
400
401 <varlistentry id="fsfreeze">
402 <term><command>fsfreeze</command></term>
403 <listitem>
404 <para>Is a very simple wrapper around FIFREEZE/FITHAW ioctl
405 kernel driver operations</para>
406 <indexterm zone="ch-system-util-linux fsfreeze">
407 <primary sortas="b-fsfreeze">fsfreeze</primary>
408 </indexterm>
409 </listitem>
410 </varlistentry>
411
412 <varlistentry id="fstrim">
413 <term><command>fstrim</command></term>
414 <listitem>
415 <para>Discards unused blocks on a mounted filesystem</para>
416 <indexterm zone="ch-system-util-linux fstrim">
417 <primary sortas="b-fstrim">fstrim</primary>
418 </indexterm>
419 </listitem>
420 </varlistentry>
421
422 <varlistentry id="getopt">
423 <term><command>getopt</command></term>
424 <listitem>
425 <para>Parses options in the given command line</para>
426 <indexterm zone="ch-system-util-linux getopt">
427 <primary sortas="b-getopt">getopt</primary>
428 </indexterm>
429 </listitem>
430 </varlistentry>
431
432 <varlistentry id="hexdump">
433 <term><command>hexdump</command></term>
434 <listitem>
435 <para>Dumps the given file in hexadecimal or in another given
436 format</para>
437 <indexterm zone="ch-system-util-linux hexdump">
438 <primary sortas="b-hexdump">hexdump</primary>
439 </indexterm>
440 </listitem>
441 </varlistentry>
442
443 <varlistentry id="hwclock">
444 <term><command>hwclock</command></term>
445 <listitem>
446 <para>Reads or sets the system's hardware clock, also called
447 the Real-Time Clock (RTC) or Basic Input-Output System (BIOS)
448 clock</para>
449 <indexterm zone="ch-system-util-linux hwclock">
450 <primary sortas="b-hwclock">hwclock</primary>
451 </indexterm>
452 </listitem>
453 </varlistentry>
454
455 <varlistentry id="i386">
456 <term><command>i386</command></term>
457 <listitem>
458 <para>A symbolic link to setarch</para>
459 <indexterm zone="ch-system-util-linux i386">
460 <primary sortas="b-i386">i386</primary>
461 </indexterm>
462 </listitem>
463 </varlistentry>
464
465 <varlistentry id="ionice">
466 <term><command>ionice</command></term>
467 <listitem>
468 <para>Gets or sets the io scheduling class and priority for a program</para>
469 <indexterm zone="ch-system-util-linux ionice">
470 <primary sortas="b-ionice">ionice</primary>
471 </indexterm>
472 </listitem>
473 </varlistentry>
474
475 <varlistentry id="ipcmk">
476 <term><command>ipcmk</command></term>
477 <listitem>
478 <para>Creates various IPC resources</para>
479 <indexterm zone="ch-system-util-linux ipcmk">
480 <primary sortas="b-ipcmk">ipcmk</primary>
481 </indexterm>
482 </listitem>
483 </varlistentry>
484
485 <varlistentry id="ipcrm">
486 <term><command>ipcrm</command></term>
487 <listitem>
488 <para>Removes the given Inter-Process Communication (IPC) resource</para>
489 <indexterm zone="ch-system-util-linux ipcrm">
490 <primary sortas="b-ipcrm">ipcrm</primary>
491 </indexterm>
492 </listitem>
493 </varlistentry>
494
495 <varlistentry id="ipcs">
496 <term><command>ipcs</command></term>
497 <listitem>
498 <para>Provides IPC status information</para>
499 <indexterm zone="ch-system-util-linux ipcs">
500 <primary sortas="b-ipcs">ipcs</primary>
501 </indexterm>
502 </listitem>
503 </varlistentry>
504
505 <varlistentry id="isosize">
506 <term><command>isosize</command></term>
507 <listitem>
508 <para>Reports the size of an iso9660 file system</para>
509 <indexterm zone="ch-system-util-linux isosize">
510 <primary sortas="b-isosize">isosize</primary>
511 </indexterm>
512 </listitem>
513 </varlistentry>
514
515 <varlistentry id="kill">
516 <term><command>kill</command></term>
517 <listitem>
518 <para>Sends signals to processes</para>
519 <indexterm zone="ch-system-util-linux kill">
520 <primary sortas="b-kill">kill</primary>
521 </indexterm>
522 </listitem>
523 </varlistentry>
524
525 <varlistentry id="last">
526 <term><command>last</command></term>
527 <listitem>
528 <para>Shows which users last logged in (and out), searching back
529 through the <filename>/var/log/wtmp</filename> file; it also shows
530 system boots, shutdowns, and run-level changes</para>
531 <indexterm zone="ch-system-util-linux last">
532 <primary sortas="b-last">last</primary>
533 </indexterm>
534 </listitem>
535 </varlistentry>
536
537 <varlistentry id="lastb">
538 <term><command>lastb</command></term>
539 <listitem>
540 <para>Shows the failed login attempts, as logged in
541 <filename>/var/log/btmp</filename></para>
542 <indexterm zone="ch-system-util-linux lastb">
543 <primary sortas="b-lastb">lastb</primary>
544 </indexterm>
545 </listitem>
546 </varlistentry>
547
548 <varlistentry id="ldattach">
549 <term><command>ldattach</command></term>
550 <listitem>
551 <para>Attaches a line discipline to a serial line</para>
552 <indexterm zone="ch-system-util-linux ldattach">
553 <primary sortas="b-ldattach">ldattach</primary>
554 </indexterm>
555 </listitem>
556 </varlistentry>
557
558 <varlistentry id="linux32">
559 <term><command>linux32</command></term>
560 <listitem>
561 <para>A symbolic link to setarch</para>
562 <indexterm zone="ch-system-util-linux linux32">
563 <primary sortas="b-linux32">linux32</primary>
564 </indexterm>
565 </listitem>
566 </varlistentry>
567
568 <varlistentry id="linux64">
569 <term><command>linux64</command></term>
570 <listitem>
571 <para>A symbolic link to setarch</para>
572 <indexterm zone="ch-system-util-linux linux64">
573 <primary sortas="b-linux64">linux64</primary>
574 </indexterm>
575 </listitem>
576 </varlistentry>
577
578 <varlistentry id="logger">
579 <term><command>logger</command></term>
580 <listitem>
581 <para>Enters the given message into the system log</para>
582 <indexterm zone="ch-system-util-linux logger">
583 <primary sortas="b-logger">logger</primary>
584 </indexterm>
585 </listitem>
586 </varlistentry>
587
588 <varlistentry id="look">
589 <term><command>look</command></term>
590 <listitem>
591 <para>Displays lines that begin with the given string</para>
592 <indexterm zone="ch-system-util-linux look">
593 <primary sortas="b-look">look</primary>
594 </indexterm>
595 </listitem>
596 </varlistentry>
597
598 <varlistentry id="losetup">
599 <term><command>losetup</command></term>
600 <listitem>
601 <para>Sets up and controls loop devices</para>
602 <indexterm zone="ch-system-util-linux losetup">
603 <primary sortas="b-losetup">losetup</primary>
604 </indexterm>
605 </listitem>
606 </varlistentry>
607
608 <varlistentry id="lsblk">
609 <term><command>lsblk</command></term>
610 <listitem>
611 <para>Lists information about all or selected block devices in
612 a tree-like format.</para>
613 <indexterm zone="ch-system-util-linux lsblk">
614 <primary sortas="b-lsblk">lsblk</primary>
615 </indexterm>
616 </listitem>
617 </varlistentry>
618
619 <varlistentry id="lscpu">
620 <term><command>lscpu</command></term>
621 <listitem>
622 <para>Prints CPU architecture information</para>
623 <indexterm zone="ch-system-util-linux lscpu">
624 <primary sortas="b-lscpu">lscpu</primary>
625 </indexterm>
626 </listitem>
627 </varlistentry>
628
629 <varlistentry id="lslocks">
630 <term><command>lslocks</command></term>
631 <listitem>
632 <para>Lists local system locks</para>
633 <indexterm zone="ch-system-util-linux lslocks">
634 <primary sortas="b-lslocks">lslocks</primary>
635 </indexterm>
636 </listitem>
637 </varlistentry>
638
639 <varlistentry id="lslogins">
640 <term><command>lslogins</command></term>
641 <listitem>
642 <para>Lists information about users, groups and system accounts</para>
643 <indexterm zone="ch-system-util-linux lslogins">
644 <primary sortas="b-lslogins">lslogins</primary>
645 </indexterm>
646 </listitem>
647 </varlistentry>
648
649 <varlistentry id="mcookie">
650 <term><command>mcookie</command></term>
651 <listitem>
652 <para>Generates magic cookies (128-bit random hexadecimal numbers) for
653 <command>xauth</command></para>
654 <indexterm zone="ch-system-util-linux mcookie">
655 <primary sortas="b-mcookie">mcookie</primary>
656 </indexterm>
657 </listitem>
658 </varlistentry>
659
660 <varlistentry id="mesg">
661 <term><command>mesg</command></term>
662 <listitem>
663 <para>Controls whether other users can send messages to the current
664 user's terminal</para>
665 <indexterm zone="ch-system-util-linux mesg">
666 <primary sortas="b-mesg">mesg</primary>
667 </indexterm>
668 </listitem>
669 </varlistentry>
670
671 <varlistentry id="mkfs">
672 <term><command>mkfs</command></term>
673 <listitem>
674 <para>Builds a file system on a device (usually a hard disk
675 partition)</para>
676 <indexterm zone="ch-system-util-linux mkfs">
677 <primary sortas="b-mkfs">mkfs</primary>
678 </indexterm>
679 </listitem>
680 </varlistentry>
681
682 <varlistentry id="mkfs.bfs">
683 <term><command>mkfs.bfs</command></term>
684 <listitem>
685 <para>Creates a Santa Cruz Operations (SCO) bfs file system</para>
686 <indexterm zone="ch-system-util-linux mkfs.bfs">
687 <primary sortas="b-mkfs.bfs">mkfs.bfs</primary>
688 </indexterm>
689 </listitem>
690 </varlistentry>
691
692 <varlistentry id="mkfs.cramfs">
693 <term><command>mkfs.cramfs</command></term>
694 <listitem>
695 <para>Creates a cramfs file system</para>
696 <indexterm zone="ch-system-util-linux mkfs.cramfs">
697 <primary sortas="b-mkfs.cramfs">mkfs.cramfs</primary>
698 </indexterm>
699 </listitem>
700 </varlistentry>
701
702 <varlistentry id="mkfs.minix">
703 <term><command>mkfs.minix</command></term>
704 <listitem>
705 <para>Creates a Minix file system</para>
706 <indexterm zone="ch-system-util-linux mkfs.minix">
707 <primary sortas="b-mkfs.minix">mkfs.minix</primary>
708 </indexterm>
709 </listitem>
710 </varlistentry>
711
712 <varlistentry id="mkswap">
713 <term><command>mkswap</command></term>
714 <listitem>
715 <para>Initializes the given device or file to be used as a swap
716 area</para>
717 <indexterm zone="ch-system-util-linux mkswap">
718 <primary sortas="b-mkswap">mkswap</primary>
719 </indexterm>
720 </listitem>
721 </varlistentry>
722
723 <varlistentry id="more">
724 <term><command>more</command></term>
725 <listitem>
726 <para>A filter for paging through text one screen at a time</para>
727 <indexterm zone="ch-system-util-linux more">
728 <primary sortas="b-more">more</primary>
729 </indexterm>
730 </listitem>
731 </varlistentry>
732
733 <varlistentry id="mount">
734 <term><command>mount</command></term>
735 <listitem>
736 <para>Attaches the file system on the given device to a specified
737 directory in the file-system tree</para>
738 <indexterm zone="ch-system-util-linux mount">
739 <primary sortas="b-mount">mount</primary>
740 </indexterm>
741 </listitem>
742 </varlistentry>
743
744 <varlistentry id="mountpoint">
745 <term><command>mountpoint</command></term>
746 <listitem>
747 <para>Checks if the directory is a mountpoint</para>
748 <indexterm zone="ch-system-util-linux mountpoint">
749 <primary sortas="b-mountpoint">mountpoint</primary>
750 </indexterm>
751 </listitem>
752 </varlistentry>
753
754 <varlistentry id="namei">
755 <term><command>namei</command></term>
756 <listitem>
757 <para>Shows the symbolic links in the given pathnames</para>
758 <indexterm zone="ch-system-util-linux namei">
759 <primary sortas="b-namei">namei</primary>
760 </indexterm>
761 </listitem>
762 </varlistentry>
763
764 <varlistentry id="nsenter">
765 <term><command>nsenter</command></term>
766 <listitem>
767 <para>Runs a program with namespaces of other processes</para>
768 <indexterm zone="ch-system-util-linux nsenter">
769 <primary sortas="b-nsenter">nsenter</primary>
770 </indexterm>
771 </listitem>
772 </varlistentry>
773
774 <varlistentry id="partx">
775 <term><command>partx</command></term>
776 <listitem>
777 <para>Tells the kernel about the presence and numbering of on-disk
778 partitions</para>
779 <indexterm zone="ch-system-util-linux partx">
780 <primary sortas="b-partx">partx</primary>
781 </indexterm>
782 </listitem>
783 </varlistentry>
784
785 <varlistentry id="pg">
786 <term><command>pg</command></term>
787 <listitem>
788 <para>Displays a text file one screen full at a time</para>
789 <indexterm zone="ch-system-util-linux pg">
790 <primary sortas="b-pg">pg</primary>
791 </indexterm>
792 </listitem>
793 </varlistentry>
794
795 <varlistentry id="pivot_root">
796 <term><command>pivot_root</command></term>
797 <listitem>
798 <para>Makes the given file system the new root file system of the
799 current process</para>
800 <indexterm zone="ch-system-util-linux pivot_root">
801 <primary sortas="b-pivot_root">pivot_root</primary>
802 </indexterm>
803 </listitem>
804 </varlistentry>
805
806 <varlistentry id="prlimit">
807 <term><command>prlimit</command></term>
808 <listitem>
809 <para>Get and set a process' resource limits</para>
810 <indexterm zone="ch-system-util-linux prlimit">
811 <primary sortas="b-prlimit">prlimit</primary>
812 </indexterm>
813 </listitem>
814 </varlistentry>
815
816 <varlistentry id="raw">
817 <term><command>raw</command></term>
818 <listitem>
819 <para>Bind a Linux raw character device to a block device</para>
820 <indexterm zone="ch-system-util-linux raw">
821 <primary sortas="b-raw">raw</primary>
822 </indexterm>
823 </listitem>
824 </varlistentry>
825
826 <varlistentry id="readprofile">
827 <term><command>readprofile</command></term>
828 <listitem>
829 <para>Reads kernel profiling information</para>
830 <indexterm zone="ch-system-util-linux readprofile">
831 <primary sortas="b-readprofile">readprofile</primary>
832 </indexterm>
833 </listitem>
834 </varlistentry>
835
836 <varlistentry id="rename">
837 <term><command>rename</command></term>
838 <listitem>
839 <para>Renames the given files, replacing a given string with
840 another</para>
841 <indexterm zone="ch-system-util-linux rename">
842 <primary sortas="b-rename">rename</primary>
843 </indexterm>
844 </listitem>
845 </varlistentry>
846
847 <varlistentry id="renice">
848 <term><command>renice</command></term>
849 <listitem>
850 <para>Alters the priority of running processes</para>
851 <indexterm zone="ch-system-util-linux renice">
852 <primary sortas="b-renice">renice</primary>
853 </indexterm>
854 </listitem>
855 </varlistentry>
856
857 <varlistentry id="resizepart">
858 <term><command>resizepart</command></term>
859 <listitem>
860 <para>Asks the Linux kernel to resize a partition</para>
861 <indexterm zone="ch-system-util-linux resizepart">
862 <primary sortas="b-resizepart">resizepart</primary>
863 </indexterm>
864 </listitem>
865 </varlistentry>
866
867 <varlistentry id="rev">
868 <term><command>rev</command></term>
869 <listitem>
870 <para>Reverses the lines of a given file</para>
871 <indexterm zone="ch-system-util-linux rev">
872 <primary sortas="b-rev">rev</primary>
873 </indexterm>
874 </listitem>
875 </varlistentry>
876
877 <varlistentry id="rtcwake">
878 <term><command>rtcwake</command></term>
879 <listitem>
880 <para>Used to enter a system sleep state until specified wakeup
881 time</para>
882 <indexterm zone="ch-system-util-linux rtcwake">
883 <primary sortas="b-rtcwake">rtcwake</primary>
884 </indexterm>
885 </listitem>
886 </varlistentry>
887
888 <varlistentry id="script">
889 <term><command>script</command></term>
890 <listitem>
891 <para>Makes a typescript of a terminal session</para>
892 <indexterm zone="ch-system-util-linux script">
893 <primary sortas="b-script">script</primary>
894 </indexterm>
895 </listitem>
896 </varlistentry>
897
898 <varlistentry id="scriptreplay">
899 <term><command>scriptreplay</command></term>
900 <listitem>
901 <para>Plays back typescripts using timing information</para>
902 <indexterm zone="ch-system-util-linux scriptreplay">
903 <primary sortas="b-scriptreplay">scriptreplay</primary>
904 </indexterm>
905 </listitem>
906 </varlistentry>
907
908 <varlistentry id="setarch">
909 <term><command>setarch</command></term>
910 <listitem>
911 <para>Changes reported architecture in a new program environment and
912 sets personality flags</para>
913 <indexterm zone="ch-system-util-linux setarch">
914 <primary sortas="b-setarch">setarch</primary>
915 </indexterm>
916 </listitem>
917 </varlistentry>
918
919 <varlistentry id="setsid">
920 <term><command>setsid</command></term>
921 <listitem>
922 <para>Runs the given program in a new session</para>
923 <indexterm zone="ch-system-util-linux setsid">
924 <primary sortas="b-setsid">setsid</primary>
925 </indexterm>
926 </listitem>
927 </varlistentry>
928
929 <varlistentry id="setterm">
930 <term><command>setterm</command></term>
931 <listitem>
932 <para>Sets terminal attributes</para>
933 <indexterm zone="ch-system-util-linux setterm">
934 <primary sortas="b-setterm">setterm</primary>
935 </indexterm>
936 </listitem>
937 </varlistentry>
938
939 <varlistentry id="sfdisk">
940 <term><command>sfdisk</command></term>
941 <listitem>
942 <para>A disk partition table manipulator</para>
943 <indexterm zone="ch-system-util-linux sfdisk">
944 <primary sortas="b-sfdisk">sfdisk</primary>
945 </indexterm>
946 </listitem>
947 </varlistentry>
948
949 <varlistentry id="sulogin">
950 <term><command>sulogin</command></term>
951 <listitem>
952 <para>Allows <systemitem class="username">root</systemitem> to log in;
953 it is normally invoked by <command>init</command> when the system goes
954 into single user mode</para>
955 <indexterm zone="ch-system-util-linux sulogin">
956 <primary sortas="b-sulogin">sulogin</primary>
957 </indexterm>
958 </listitem>
959 </varlistentry>
960
961 <varlistentry id="swaplabel">
962 <term><command>swaplabel</command></term>
963 <listitem>
964 <para>Allows to change swaparea UUID and label</para>
965 <indexterm zone="ch-system-util-linux swaplabel">
966 <primary sortas="b-swaplabel">swaplabel</primary>
967 </indexterm>
968 </listitem>
969 </varlistentry>
970
971 <varlistentry id="swapoff">
972 <term><command>swapoff</command></term>
973 <listitem>
974 <para>Disables devices and files for paging and swapping</para>
975 <indexterm zone="ch-system-util-linux swapoff">
976 <primary sortas="b-swapoff">swapoff</primary>
977 </indexterm>
978 </listitem>
979 </varlistentry>
980
981 <varlistentry id="swapon">
982 <term><command>swapon</command></term>
983 <listitem>
984 <para>Enables devices and files for paging and swapping and
985 lists the devices and files currently in use</para>
986 <indexterm zone="ch-system-util-linux swapon">
987 <primary sortas="b-swapon">swapon</primary>
988 </indexterm>
989 </listitem>
990 </varlistentry>
991
992 <varlistentry id="switch_root">
993 <term><command>switch_root</command></term>
994 <listitem>
995 <para>Switches to another filesystem as the root of the mount tree</para>
996 <indexterm zone="ch-system-util-linux switch_root">
997 <primary sortas="b-switch_root">switch_root</primary>
998 </indexterm>
999 </listitem>
1000 </varlistentry>
1001
1002 <varlistentry id="tailf">
1003 <term><command>tailf</command></term>
1004 <listitem>
1005 <para>Tracks the growth of a log file. Displays the last 10 lines
1006 of a log file, then continues displaying any new entries in the
1007 log file as they are created</para>
1008 <indexterm zone="ch-system-util-linux tailf">
1009 <primary sortas="b-tailf">tailf</primary>
1010 </indexterm>
1011 </listitem>
1012 </varlistentry>
1013
1014 <varlistentry id="taskset">
1015 <term><command>taskset</command></term>
1016 <listitem>
1017 <para>Retrieves or sets a process' CPU affinity</para>
1018 <indexterm zone="ch-system-util-linux taskset">
1019 <primary sortas="b-taskset">taskset</primary>
1020 </indexterm>
1021 </listitem>
1022 </varlistentry>
1023
1024 <varlistentry id="ul">
1025 <term><command>ul</command></term>
1026 <listitem>
1027 <para>A filter for translating underscores into escape sequences
1028 indicating underlining for the terminal in use</para>
1029 <indexterm zone="ch-system-util-linux ul">
1030 <primary sortas="b-ul">ul</primary>
1031 </indexterm>
1032 </listitem>
1033 </varlistentry>
1034
1035 <varlistentry id="umount">
1036 <term><command>umount</command></term>
1037 <listitem>
1038 <para>Disconnects a file system from the system's file tree</para>
1039 <indexterm zone="ch-system-util-linux umount">
1040 <primary sortas="b-umount">umount</primary>
1041 </indexterm>
1042 </listitem>
1043 </varlistentry>
1044
1045 <varlistentry id="unshare">
1046 <term><command>unshare</command></term>
1047 <listitem>
1048 <para>Runs a program with some namespaces unshared from parent</para>
1049 <indexterm zone="ch-system-util-linux unshare">
1050 <primary sortas="b-unshare">unshare</primary>
1051 </indexterm>
1052 </listitem>
1053 </varlistentry>
1054
1055 <varlistentry id="utmpdump">
1056 <term><command>utmpdump</command></term>
1057 <listitem>
1058 <para>Displays the content of the given login file in a more
1059 user-friendly format</para>
1060 <indexterm zone="ch-system-util-linux utmpdump">
1061 <primary sortas="b-utmpdump">utmpdump</primary>
1062 </indexterm>
1063 </listitem>
1064 </varlistentry>
1065
1066 <varlistentry id="uuidd">
1067 <term><command>uuidd</command></term>
1068 <listitem>
1069 <para>A daemon used by the UUID library to generate time-based
1070 UUIDs in a secure and guranteed-unique fashion.</para>
1071 <indexterm zone="ch-system-util-linux uuidd">
1072 <primary sortas="b-uuidd">uuidd</primary>
1073 </indexterm>
1074 </listitem>
1075 </varlistentry>
1076
1077 <varlistentry id="uuidgen">
1078 <term><command>uuidgen</command></term>
1079 <listitem>
1080 <para>Creates new UUIDs. Each new UUID can reasonably be considered
1081 unique among all UUIDs created, on the local system and on other
1082 systems, in the past and in the future</para>
1083 <indexterm zone="ch-system-util-linux uuidgen">
1084 <primary sortas="b-uuidgen">uuidgen</primary>
1085 </indexterm>
1086 </listitem>
1087 </varlistentry>
1088
1089 <varlistentry id="wall">
1090 <term><command>wall</command></term>
1091 <listitem>
1092 <para>Displays the contents of a file or, by default, its standard
1093 input, on the terminals of all currently logged in users</para>
1094 <indexterm zone="ch-system-util-linux wall">
1095 <primary sortas="b-wall">wall</primary>
1096 </indexterm>
1097 </listitem>
1098 </varlistentry>
1099
1100 <varlistentry id="wdctl">
1101 <term><command>wdctl</command></term>
1102 <listitem>
1103 <para>Shows hardware watchdog status</para>
1104 <indexterm zone="ch-system-util-linux wdctl">
1105 <primary sortas="b-wdctl">wdctl</primary>
1106 </indexterm>
1107 </listitem>
1108 </varlistentry>
1109
1110 <varlistentry id="whereis">
1111 <term><command>whereis</command></term>
1112 <listitem>
1113 <para>Reports the location of the binary, source, and man page
1114 for the given command</para>
1115 <indexterm zone="ch-system-util-linux whereis">
1116 <primary sortas="b-whereis">whereis</primary>
1117 </indexterm>
1118 </listitem>
1119 </varlistentry>
1120
1121 <varlistentry id="wipefs">
1122 <term><command>wipefs</command></term>
1123 <listitem>
1124 <para>Wipes a filesystem signature from a device</para>
1125 <indexterm zone="ch-system-util-linux wipefs">
1126 <primary sortas="b-wipefs">wipefs</primary>
1127 </indexterm>
1128 </listitem>
1129 </varlistentry>
1130
1131 <varlistentry id="x86_64">
1132 <term><command>x86_64</command></term>
1133 <listitem>
1134 <para>A symbolic link to setarch</para>
1135 <indexterm zone="ch-system-util-linux x86_64">
1136 <primary sortas="b-x86_64">x86_64</primary>
1137 </indexterm>
1138 </listitem>
1139 </varlistentry>
1140
1141 <varlistentry id="libblkid">
1142 <term><filename class="libraryfile">libblkid</filename></term>
1143 <listitem>
1144 <para>Contains routines for device identification and token
1145 extraction</para>
1146 <indexterm zone="ch-system-util-linux libblkid">
1147 <primary sortas="c-libblkid">libblkid</primary>
1148 </indexterm>
1149 </listitem>
1150 </varlistentry>
1151
1152 <varlistentry id="libmount">
1153 <term><filename class="libraryfile">libmount</filename></term>
1154 <listitem>
1155 <para>Contains routines for block device mounting and
1156 unmounting</para>
1157 <indexterm zone="ch-system-util-linux libmount">
1158 <primary sortas="c-libmount">libmount</primary>
1159 </indexterm>
1160 </listitem>
1161 </varlistentry>
1162
1163 <varlistentry id="libuuid">
1164 <term><filename class="libraryfile">libuuid</filename></term>
1165 <listitem>
1166 <para>Contains routines for generating unique identifiers for objects
1167 that may be accessible beyond the local system</para>
1168 <indexterm zone="ch-system-util-linux libuuid">
1169 <primary sortas="c-libuuid">libuuid</primary>
1170 </indexterm>
1171 </listitem>
1172 </varlistentry>
1173
1174 </variablelist>
1175
1176 </sect2>
1177
1178</sect1>
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