source: chapter06/util-linux.xml@ 1fa2099

multilib-10.1
Last change on this file since 1fa2099 was 1fa2099, checked in by Thomas Trepl <thomas@…>, 5 years ago

Initial creation of multilib branch

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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>Remove the earlier created symlinks:</para>
64
65<screen><userinput remap="pre">rm -vf /usr/include/{blkid,libmount,uuid}</userinput></screen>
66
67 <para>Prepare Util-linux for compilation:</para>
68
69<screen revision="sysv"><userinput remap="configure">./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
70 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
71 --disable-chfn-chsh \
72 --disable-login \
73 --disable-nologin \
74 --disable-su \
75 --disable-setpriv \
76 --disable-runuser \
77 --disable-pylibmount \
78 --disable-static \
79 --without-python \
80 --without-systemd \
81 --without-systemdsystemunitdir</userinput></screen>
82
83<screen revision="systemd"><userinput remap="configure">./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
84 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
85 --disable-chfn-chsh \
86 --disable-login \
87 --disable-nologin \
88 --disable-su \
89 --disable-setpriv \
90 --disable-runuser \
91 --disable-pylibmount \
92 --disable-static \
93 --without-python</userinput></screen>
94
95 <para>The --disable and --without options prevent warnings about
96 building components that require packages not in LFS or are
97 inconsistent with programs installed by other packages.</para>
98
99 <para>Compile the package:</para>
100
101<screen><userinput remap="make">make</userinput></screen>
102
103 <para>If desired, run the test suite as a non-root user:</para>
104
105 <warning><para>Running the test suite as the root user can be harmful to
106 your system. To run it, the CONFIG_SCSI_DEBUG option for the kernel must
107 be available in the currently running system, and must be built as a
108 module. Building it into the kernel will prevent booting. For complete
109 coverage, other BLFS packages must be installed. If desired, this test can
110 be run after rebooting into the completed LFS system and running:</para>
111
112 <screen role="nodump"><userinput>bash tests/run.sh --srcdir=$PWD --builddir=$PWD</userinput></screen>
113 </warning>
114
115 <screen><userinput remap="test">chown -Rv nobody .
116su nobody -s /bin/bash -c "PATH=$PATH make -k check"</userinput></screen>
117
118 <para>Install the package:</para>
119
120<screen><userinput remap="install">make install</userinput></screen>
121
122 </sect2>
123
124 <sect2 id="contents-utillinux" role="content">
125 <title>Contents of Util-linux</title>
126
127 <segmentedlist>
128 <segtitle>Installed programs</segtitle>
129 <segtitle>Installed libraries</segtitle>
130 <segtitle>Installed directories</segtitle>
131
132 <seglistitem>
133 <seg>addpart, agetty, blkdiscard, blkid, blkzone, blockdev, cal, cfdisk, chcpu,
134 chmem, choom, chrt, col, colcrt, colrm, column, ctrlaltdel, delpart, dmesg,
135 eject, fallocate, fdformat, fdisk, fincore, findfs, findmnt, flock, fsck,
136 fsck.cramfs, fsck.minix, fsfreeze, fstrim, getopt, hexdump, hwclock,
137 i386, ionice, ipcmk, ipcrm, ipcs, isosize, kill, last, lastb (link to
138 last), ldattach, linux32, linux64, logger, look, losetup, lsblk, lscpu,
139 lsipc, lslocks, lslogins, lsmem, lsns, mcookie, mesg, mkfs, mkfs.bfs, mkfs.cramfs, mkfs.minix, mkswap,
140 more, mount, mountpoint, namei, nsenter, partx, pivot_root, prlimit, raw,
141 readprofile, rename, renice, resizepart, rev, rfkill, rtcwake, script,
142 scriptreplay, setarch, setsid, setterm, sfdisk, sulogin, swaplabel,
143 swapoff (link to swapon), swapon, switch_root, taskset, ul,
144 umount, uname26, unshare, utmpdump, uuidd, uuidgen, uuidparse, wall, wdctl, whereis,
145 wipefs, x86_64, and zramctl</seg>
146 <seg>libblkid.so, libfdisk.so, libmount.so,
147 libsmartcols.so, and libuuid.so</seg>
148 <seg>/usr/include/blkid,
149 /usr/include/libfdisk,
150 /usr/include/libmount,
151 /usr/include/libsmartcols,
152 /usr/include/uuid,
153 /usr/share/doc/util-linux-&util-linux-version;,
154 and /var/lib/hwclock</seg>
155 </seglistitem>
156 </segmentedlist>
157
158 <variablelist>
159 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
160 <?dbfo list-presentation="list"?>
161 <?dbhtml list-presentation="table"?>
162
163 <varlistentry id="addpart">
164 <term><command>addpart</command></term>
165 <listitem>
166 <para>Informs the Linux kernel of new partitions</para>
167 <indexterm zone="ch-system-util-linux addpart">
168 <primary sortas="b-addpart">addpart</primary>
169 </indexterm>
170 </listitem>
171 </varlistentry>
172
173 <varlistentry id="agetty">
174 <term><command>agetty</command></term>
175 <listitem>
176 <para>Opens a tty port, prompts for a login name,
177 and then invokes the <command>login</command> program</para>
178 <indexterm zone="ch-system-util-linux agetty">
179 <primary sortas="b-agetty">agetty</primary>
180 </indexterm>
181 </listitem>
182 </varlistentry>
183
184 <varlistentry id="blkdiscard">
185 <term><command>blkdiscard</command></term>
186 <listitem>
187 <para>Discards sectors on a device</para>
188 <indexterm zone="ch-system-util-linux blkdiscard">
189 <primary sortas="b-blkdiscard">blkdiscard</primary>
190 </indexterm>
191 </listitem>
192 </varlistentry>
193
194 <varlistentry id="blkid">
195 <term><command>blkid</command></term>
196 <listitem>
197 <para>A command line utility to locate and print block device
198 attributes</para>
199 <indexterm zone="ch-system-util-linux blkid">
200 <primary sortas="b-blkid">blkid</primary>
201 </indexterm>
202 </listitem>
203 </varlistentry>
204
205 <varlistentry id="blkzone">
206 <term><command>blkzone</command></term>
207 <listitem>
208 <para>Runs zone command on the given block device</para>
209 <indexterm zone="ch-system-util-linux blkzone">
210 <primary sortas="b-blkzone">blkzone</primary>
211 </indexterm>
212 </listitem>
213 </varlistentry>
214
215 <varlistentry id="blockdev">
216 <term><command>blockdev</command></term>
217 <listitem>
218 <para>Allows users to call block device ioctls from the command
219 line</para>
220 <indexterm zone="ch-system-util-linux blockdev">
221 <primary sortas="b-blockdev">blockdev</primary>
222 </indexterm>
223 </listitem>
224 </varlistentry>
225
226 <varlistentry id="cal">
227 <term><command>cal</command></term>
228 <listitem>
229 <para>Displays a simple calendar</para>
230 <indexterm zone="ch-system-util-linux cal">
231 <primary sortas="b-cal">cal</primary>
232 </indexterm>
233 </listitem>
234 </varlistentry>
235
236 <varlistentry id="cfdisk">
237 <term><command>cfdisk</command></term>
238 <listitem>
239 <para>Manipulates the partition table of the given device</para>
240 <indexterm zone="ch-system-util-linux cfdisk">
241 <primary sortas="b-cfdisk">cfdisk</primary>
242 </indexterm>
243 </listitem>
244 </varlistentry>
245
246 <varlistentry id="chcpu">
247 <term><command>chcpu</command></term>
248 <listitem>
249 <para>Modifies the state of CPUs</para>
250 <indexterm zone="ch-system-util-linux chcpu">
251 <primary sortas="b-chcpu">chcpu</primary>
252 </indexterm>
253 </listitem>
254 </varlistentry>
255
256 <varlistentry id="chmem">
257 <term><command>chmem</command></term>
258 <listitem>
259 <para>Configures memory</para>
260 <indexterm zone="ch-system-util-linux chmem">
261 <primary sortas="b-chmem">chmem</primary>
262 </indexterm>
263 </listitem>
264 </varlistentry>
265
266 <varlistentry id="choom">
267 <term><command>choom</command></term>
268 <listitem>
269 <para>Displays and adjusts OOM-killer score</para>
270 <indexterm zone="ch-system-util-linux choom">
271 <primary sortas="b-choom">choom</primary>
272 </indexterm>
273 </listitem>
274 </varlistentry>
275
276 <varlistentry id="chrt">
277 <term><command>chrt</command></term>
278 <listitem>
279 <para>Manipulates real-time attributes of a process</para>
280 <indexterm zone="ch-system-util-linux chrt">
281 <primary sortas="b-chrt">chrt</primary>
282 </indexterm>
283 </listitem>
284 </varlistentry>
285
286 <varlistentry id="col">
287 <term><command>col</command></term>
288 <listitem>
289 <para>Filters out reverse line feeds</para>
290 <indexterm zone="ch-system-util-linux col">
291 <primary sortas="b-col">col</primary>
292 </indexterm>
293 </listitem>
294 </varlistentry>
295
296 <varlistentry id="colcrt">
297 <term><command>colcrt</command></term>
298 <listitem>
299 <para>Filters <command>nroff</command> output for terminals
300 that lack some capabilities, such as overstriking and half-lines</para>
301 <indexterm zone="ch-system-util-linux colcrt">
302 <primary sortas="b-colcrt">colcrt</primary>
303 </indexterm>
304 </listitem>
305 </varlistentry>
306
307 <varlistentry id="colrm">
308 <term><command>colrm</command></term>
309 <listitem>
310 <para>Filters out the given columns</para>
311 <indexterm zone="ch-system-util-linux colrm">
312 <primary sortas="b-colrm">colrm</primary>
313 </indexterm>
314 </listitem>
315 </varlistentry>
316
317 <varlistentry id="column">
318 <term><command>column</command></term>
319 <listitem>
320 <para>Formats a given file into multiple columns</para>
321 <indexterm zone="ch-system-util-linux column">
322 <primary sortas="b-column">column</primary>
323 </indexterm>
324 </listitem>
325 </varlistentry>
326
327 <varlistentry id="ctrlaltdel">
328 <term><command>ctrlaltdel</command></term>
329 <listitem>
330 <para>Sets the function of the Ctrl+Alt+Del key combination to a
331 hard or a soft reset</para>
332 <indexterm zone="ch-system-util-linux ctrlaltdel">
333 <primary sortas="b-ctrlaltdel">ctrlaltdel</primary>
334 </indexterm>
335 </listitem>
336 </varlistentry>
337
338 <varlistentry id="delpart">
339 <term><command>delpart</command></term>
340 <listitem>
341 <para>Asks the Linux kernel to remove a partition</para>
342 <indexterm zone="ch-system-util-linux delpart">
343 <primary sortas="b-delpart">delpart</primary>
344 </indexterm>
345 </listitem>
346 </varlistentry>
347
348 <varlistentry id="dmesg">
349 <term><command>dmesg</command></term>
350 <listitem>
351 <para>Dumps the kernel boot messages</para>
352 <indexterm zone="ch-system-util-linux dmesg">
353 <primary sortas="b-dmesg">dmesg</primary>
354 </indexterm>
355 </listitem>
356 </varlistentry>
357
358 <varlistentry id="eject">
359 <term><command>eject</command></term>
360 <listitem>
361 <para>Ejects removable media</para>
362 <indexterm zone="ch-system-util-linux eject">
363 <primary sortas="b-eject">eject</primary>
364 </indexterm>
365 </listitem>
366 </varlistentry>
367
368 <varlistentry id="fallocate">
369 <term><command>fallocate</command></term>
370 <listitem>
371 <para>Preallocates space to a file</para>
372 <indexterm zone="ch-system-util-linux fallocate">
373 <primary sortas="b-fallocate">fallocate</primary>
374 </indexterm>
375 </listitem>
376 </varlistentry>
377
378 <varlistentry id="fdformat">
379 <term><command>fdformat</command></term>
380 <listitem>
381 <para>Low-level formats a floppy disk</para>
382 <indexterm zone="ch-system-util-linux fdformat">
383 <primary sortas="b-fdformat">fdformat</primary>
384 </indexterm>
385 </listitem>
386 </varlistentry>
387
388 <varlistentry id="fdisk">
389 <term><command>fdisk</command></term>
390 <listitem>
391 <para>Manipulates the partition table of the given device</para>
392 <indexterm zone="ch-system-util-linux fdisk">
393 <primary sortas="b-fdisk">fdisk</primary>
394 </indexterm>
395 </listitem>
396 </varlistentry>
397
398 <varlistentry id="fincore">
399 <term><command>fincore</command></term>
400 <listitem>
401 <para>Counts pages of file contents in core</para>
402 <indexterm zone="ch-system-util-linux fincore">
403 <primary sortas="b-fincore">fincore</primary>
404 </indexterm>
405 </listitem>
406 </varlistentry>
407
408 <varlistentry id="findfs">
409 <term><command>findfs</command></term>
410 <listitem>
411 <para>Finds a file system by label or Universally Unique Identifier
412 (UUID)</para>
413 <indexterm zone="ch-system-util-linux findfs">
414 <primary sortas="b-findfs">findfs</primary>
415 </indexterm>
416 </listitem>
417 </varlistentry>
418
419 <varlistentry id="findmnt">
420 <term><command>findmnt</command></term>
421 <listitem>
422 <para>Is a command line interface to the libmount library
423 for work with mountinfo, fstab and mtab files</para>
424 <indexterm zone="ch-system-util-linux findmnt">
425 <primary sortas="b-findmnt">findmnt</primary>
426 </indexterm>
427 </listitem>
428 </varlistentry>
429
430 <varlistentry id="flock">
431 <term><command>flock</command></term>
432 <listitem>
433 <para>Acquires a file lock and then executes a command with the lock
434 held</para>
435 <indexterm zone="ch-system-util-linux flock">
436 <primary sortas="b-flock">flock</primary>
437 </indexterm>
438 </listitem>
439 </varlistentry>
440
441 <varlistentry id="fsck">
442 <term><command>fsck</command></term>
443 <listitem>
444 <para>Is used to check, and optionally repair, file systems</para>
445 <indexterm zone="ch-system-util-linux fsck">
446 <primary sortas="b-fsck">fsck</primary>
447 </indexterm>
448 </listitem>
449 </varlistentry>
450
451 <varlistentry id="fsck.cramfs">
452 <term><command>fsck.cramfs</command></term>
453 <listitem>
454 <para>Performs a consistency check on the Cramfs file system on the
455 given device</para>
456 <indexterm zone="ch-system-util-linux fsck.cramfs">
457 <primary sortas="b-fsck.cramfs">fsck.cramfs</primary>
458 </indexterm>
459 </listitem>
460 </varlistentry>
461
462 <varlistentry id="fsck.minix">
463 <term><command>fsck.minix</command></term>
464 <listitem>
465 <para>Performs a consistency check on the Minix file system on the
466 given device</para>
467 <indexterm zone="ch-system-util-linux fsck.minix">
468 <primary sortas="b-fsck.minix">fsck.minix</primary>
469 </indexterm>
470 </listitem>
471 </varlistentry>
472
473 <varlistentry id="fsfreeze">
474 <term><command>fsfreeze</command></term>
475 <listitem>
476 <para>Is a very simple wrapper around FIFREEZE/FITHAW ioctl
477 kernel driver operations</para>
478 <indexterm zone="ch-system-util-linux fsfreeze">
479 <primary sortas="b-fsfreeze">fsfreeze</primary>
480 </indexterm>
481 </listitem>
482 </varlistentry>
483
484 <varlistentry id="fstrim">
485 <term><command>fstrim</command></term>
486 <listitem>
487 <para>Discards unused blocks on a mounted filesystem</para>
488 <indexterm zone="ch-system-util-linux fstrim">
489 <primary sortas="b-fstrim">fstrim</primary>
490 </indexterm>
491 </listitem>
492 </varlistentry>
493
494 <varlistentry id="getopt">
495 <term><command>getopt</command></term>
496 <listitem>
497 <para>Parses options in the given command line</para>
498 <indexterm zone="ch-system-util-linux getopt">
499 <primary sortas="b-getopt">getopt</primary>
500 </indexterm>
501 </listitem>
502 </varlistentry>
503
504 <varlistentry id="hexdump">
505 <term><command>hexdump</command></term>
506 <listitem>
507 <para>Dumps the given file in hexadecimal or in another given
508 format</para>
509 <indexterm zone="ch-system-util-linux hexdump">
510 <primary sortas="b-hexdump">hexdump</primary>
511 </indexterm>
512 </listitem>
513 </varlistentry>
514
515 <varlistentry id="hwclock">
516 <term><command>hwclock</command></term>
517 <listitem>
518 <para>Reads or sets the system's hardware clock, also called
519 the Real-Time Clock (RTC) or Basic Input-Output System (BIOS)
520 clock</para>
521 <indexterm zone="ch-system-util-linux hwclock">
522 <primary sortas="b-hwclock">hwclock</primary>
523 </indexterm>
524 </listitem>
525 </varlistentry>
526
527 <varlistentry id="i386">
528 <term><command>i386</command></term>
529 <listitem>
530 <para>A symbolic link to setarch</para>
531 <indexterm zone="ch-system-util-linux i386">
532 <primary sortas="b-i386">i386</primary>
533 </indexterm>
534 </listitem>
535 </varlistentry>
536
537 <varlistentry id="ionice">
538 <term><command>ionice</command></term>
539 <listitem>
540 <para>Gets or sets the io scheduling class and priority for a program</para>
541 <indexterm zone="ch-system-util-linux ionice">
542 <primary sortas="b-ionice">ionice</primary>
543 </indexterm>
544 </listitem>
545 </varlistentry>
546
547 <varlistentry id="ipcmk">
548 <term><command>ipcmk</command></term>
549 <listitem>
550 <para>Creates various IPC resources</para>
551 <indexterm zone="ch-system-util-linux ipcmk">
552 <primary sortas="b-ipcmk">ipcmk</primary>
553 </indexterm>
554 </listitem>
555 </varlistentry>
556
557 <varlistentry id="ipcrm">
558 <term><command>ipcrm</command></term>
559 <listitem>
560 <para>Removes the given Inter-Process Communication (IPC) resource</para>
561 <indexterm zone="ch-system-util-linux ipcrm">
562 <primary sortas="b-ipcrm">ipcrm</primary>
563 </indexterm>
564 </listitem>
565 </varlistentry>
566
567 <varlistentry id="ipcs">
568 <term><command>ipcs</command></term>
569 <listitem>
570 <para>Provides IPC status information</para>
571 <indexterm zone="ch-system-util-linux ipcs">
572 <primary sortas="b-ipcs">ipcs</primary>
573 </indexterm>
574 </listitem>
575 </varlistentry>
576
577 <varlistentry id="isosize">
578 <term><command>isosize</command></term>
579 <listitem>
580 <para>Reports the size of an iso9660 file system</para>
581 <indexterm zone="ch-system-util-linux isosize">
582 <primary sortas="b-isosize">isosize</primary>
583 </indexterm>
584 </listitem>
585 </varlistentry>
586
587 <varlistentry id="kill">
588 <term><command>kill</command></term>
589 <listitem>
590 <para>Sends signals to processes</para>
591 <indexterm zone="ch-system-util-linux kill">
592 <primary sortas="b-kill">kill</primary>
593 </indexterm>
594 </listitem>
595 </varlistentry>
596
597 <varlistentry id="last">
598 <term><command>last</command></term>
599 <listitem>
600 <para>Shows which users last logged in (and out), searching back
601 through the <filename>/var/log/wtmp</filename> file; it also shows
602 system boots, shutdowns, and run-level changes</para>
603 <indexterm zone="ch-system-util-linux last">
604 <primary sortas="b-last">last</primary>
605 </indexterm>
606 </listitem>
607 </varlistentry>
608
609 <varlistentry id="lastb">
610 <term><command>lastb</command></term>
611 <listitem>
612 <para>Shows the failed login attempts, as logged in
613 <filename>/var/log/btmp</filename></para>
614 <indexterm zone="ch-system-util-linux lastb">
615 <primary sortas="b-lastb">lastb</primary>
616 </indexterm>
617 </listitem>
618 </varlistentry>
619
620 <varlistentry id="ldattach">
621 <term><command>ldattach</command></term>
622 <listitem>
623 <para>Attaches a line discipline to a serial line</para>
624 <indexterm zone="ch-system-util-linux ldattach">
625 <primary sortas="b-ldattach">ldattach</primary>
626 </indexterm>
627 </listitem>
628 </varlistentry>
629
630 <varlistentry id="linux32">
631 <term><command>linux32</command></term>
632 <listitem>
633 <para>A symbolic link to setarch</para>
634 <indexterm zone="ch-system-util-linux linux32">
635 <primary sortas="b-linux32">linux32</primary>
636 </indexterm>
637 </listitem>
638 </varlistentry>
639
640 <varlistentry id="linux64">
641 <term><command>linux64</command></term>
642 <listitem>
643 <para>A symbolic link to setarch</para>
644 <indexterm zone="ch-system-util-linux linux64">
645 <primary sortas="b-linux64">linux64</primary>
646 </indexterm>
647 </listitem>
648 </varlistentry>
649
650 <varlistentry id="logger">
651 <term><command>logger</command></term>
652 <listitem>
653 <para>Enters the given message into the system log</para>
654 <indexterm zone="ch-system-util-linux logger">
655 <primary sortas="b-logger">logger</primary>
656 </indexterm>
657 </listitem>
658 </varlistentry>
659
660 <varlistentry id="look">
661 <term><command>look</command></term>
662 <listitem>
663 <para>Displays lines that begin with the given string</para>
664 <indexterm zone="ch-system-util-linux look">
665 <primary sortas="b-look">look</primary>
666 </indexterm>
667 </listitem>
668 </varlistentry>
669
670 <varlistentry id="losetup">
671 <term><command>losetup</command></term>
672 <listitem>
673 <para>Sets up and controls loop devices</para>
674 <indexterm zone="ch-system-util-linux losetup">
675 <primary sortas="b-losetup">losetup</primary>
676 </indexterm>
677 </listitem>
678 </varlistentry>
679
680 <varlistentry id="lsblk">
681 <term><command>lsblk</command></term>
682 <listitem>
683 <para>Lists information about all or selected block devices in
684 a tree-like format</para>
685 <indexterm zone="ch-system-util-linux lsblk">
686 <primary sortas="b-lsblk">lsblk</primary>
687 </indexterm>
688 </listitem>
689 </varlistentry>
690
691 <varlistentry id="lscpu">
692 <term><command>lscpu</command></term>
693 <listitem>
694 <para>Prints CPU architecture information</para>
695 <indexterm zone="ch-system-util-linux lscpu">
696 <primary sortas="b-lscpu">lscpu</primary>
697 </indexterm>
698 </listitem>
699 </varlistentry>
700
701 <varlistentry id="lsipc">
702 <term><command>lsipc</command></term>
703 <listitem>
704 <para>Prints information on IPC facilities currently employed
705 in the system</para>
706 <indexterm zone="ch-system-util-linux lsipc">
707 <primary sortas="b-lsipc">lsipc</primary>
708 </indexterm>
709 </listitem>
710 </varlistentry>
711
712 <varlistentry id="lslocks">
713 <term><command>lslocks</command></term>
714 <listitem>
715 <para>Lists local system locks</para>
716 <indexterm zone="ch-system-util-linux lslocks">
717 <primary sortas="b-lslocks">lslocks</primary>
718 </indexterm>
719 </listitem>
720 </varlistentry>
721
722 <varlistentry id="lslogins">
723 <term><command>lslogins</command></term>
724 <listitem>
725 <para>Lists information about users, groups and system accounts</para>
726 <indexterm zone="ch-system-util-linux lslogins">
727 <primary sortas="b-lslogins">lslogins</primary>
728 </indexterm>
729 </listitem>
730 </varlistentry>
731
732 <varlistentry id="lsmem">
733 <term><command>lsmem</command></term>
734 <listitem>
735 <para>Lists the ranges of available memory with their online
736 status</para>
737 <indexterm zone="ch-system-util-linux lsmem">
738 <primary sortas="b-lsmem">lsmem</primary>
739 </indexterm>
740 </listitem>
741 </varlistentry>
742
743 <varlistentry id="lsns">
744 <term><command>lsns</command></term>
745 <listitem>
746 <para>Lists namespaces</para>
747 <indexterm zone="ch-system-util-linux lsns">
748 <primary sortas="b-lsns">lsns</primary>
749 </indexterm>
750 </listitem>
751 </varlistentry>
752
753 <varlistentry id="mcookie">
754 <term><command>mcookie</command></term>
755 <listitem>
756 <para>Generates magic cookies (128-bit random hexadecimal numbers) for
757 <command>xauth</command></para>
758 <indexterm zone="ch-system-util-linux mcookie">
759 <primary sortas="b-mcookie">mcookie</primary>
760 </indexterm>
761 </listitem>
762 </varlistentry>
763
764 <varlistentry id="mesg">
765 <term><command>mesg</command></term>
766 <listitem>
767 <para>Controls whether other users can send messages to the current
768 user's terminal</para>
769 <indexterm zone="ch-system-util-linux mesg">
770 <primary sortas="b-mesg">mesg</primary>
771 </indexterm>
772 </listitem>
773 </varlistentry>
774
775 <varlistentry id="mkfs">
776 <term><command>mkfs</command></term>
777 <listitem>
778 <para>Builds a file system on a device (usually a hard disk
779 partition)</para>
780 <indexterm zone="ch-system-util-linux mkfs">
781 <primary sortas="b-mkfs">mkfs</primary>
782 </indexterm>
783 </listitem>
784 </varlistentry>
785
786 <varlistentry id="mkfs.bfs">
787 <term><command>mkfs.bfs</command></term>
788 <listitem>
789 <para>Creates a Santa Cruz Operations (SCO) bfs file system</para>
790 <indexterm zone="ch-system-util-linux mkfs.bfs">
791 <primary sortas="b-mkfs.bfs">mkfs.bfs</primary>
792 </indexterm>
793 </listitem>
794 </varlistentry>
795
796 <varlistentry id="mkfs.cramfs">
797 <term><command>mkfs.cramfs</command></term>
798 <listitem>
799 <para>Creates a cramfs file system</para>
800 <indexterm zone="ch-system-util-linux mkfs.cramfs">
801 <primary sortas="b-mkfs.cramfs">mkfs.cramfs</primary>
802 </indexterm>
803 </listitem>
804 </varlistentry>
805
806 <varlistentry id="mkfs.minix">
807 <term><command>mkfs.minix</command></term>
808 <listitem>
809 <para>Creates a Minix file system</para>
810 <indexterm zone="ch-system-util-linux mkfs.minix">
811 <primary sortas="b-mkfs.minix">mkfs.minix</primary>
812 </indexterm>
813 </listitem>
814 </varlistentry>
815
816 <varlistentry id="mkswap">
817 <term><command>mkswap</command></term>
818 <listitem>
819 <para>Initializes the given device or file to be used as a swap
820 area</para>
821 <indexterm zone="ch-system-util-linux mkswap">
822 <primary sortas="b-mkswap">mkswap</primary>
823 </indexterm>
824 </listitem>
825 </varlistentry>
826
827 <varlistentry id="more">
828 <term><command>more</command></term>
829 <listitem>
830 <para>A filter for paging through text one screen at a time</para>
831 <indexterm zone="ch-system-util-linux more">
832 <primary sortas="b-more">more</primary>
833 </indexterm>
834 </listitem>
835 </varlistentry>
836
837 <varlistentry id="mount">
838 <term><command>mount</command></term>
839 <listitem>
840 <para>Attaches the file system on the given device to a specified
841 directory in the file-system tree</para>
842 <indexterm zone="ch-system-util-linux mount">
843 <primary sortas="b-mount">mount</primary>
844 </indexterm>
845 </listitem>
846 </varlistentry>
847
848 <varlistentry id="mountpoint">
849 <term><command>mountpoint</command></term>
850 <listitem>
851 <para>Checks if the directory is a mountpoint</para>
852 <indexterm zone="ch-system-util-linux mountpoint">
853 <primary sortas="b-mountpoint">mountpoint</primary>
854 </indexterm>
855 </listitem>
856 </varlistentry>
857
858 <varlistentry id="namei">
859 <term><command>namei</command></term>
860 <listitem>
861 <para>Shows the symbolic links in the given pathnames</para>
862 <indexterm zone="ch-system-util-linux namei">
863 <primary sortas="b-namei">namei</primary>
864 </indexterm>
865 </listitem>
866 </varlistentry>
867
868 <varlistentry id="nsenter">
869 <term><command>nsenter</command></term>
870 <listitem>
871 <para>Runs a program with namespaces of other processes</para>
872 <indexterm zone="ch-system-util-linux nsenter">
873 <primary sortas="b-nsenter">nsenter</primary>
874 </indexterm>
875 </listitem>
876 </varlistentry>
877
878 <varlistentry id="partx">
879 <term><command>partx</command></term>
880 <listitem>
881 <para>Tells the kernel about the presence and numbering of on-disk
882 partitions</para>
883 <indexterm zone="ch-system-util-linux partx">
884 <primary sortas="b-partx">partx</primary>
885 </indexterm>
886 </listitem>
887 </varlistentry>
888
889 <varlistentry id="pivot_root">
890 <term><command>pivot_root</command></term>
891 <listitem>
892 <para>Makes the given file system the new root file system of the
893 current process</para>
894 <indexterm zone="ch-system-util-linux pivot_root">
895 <primary sortas="b-pivot_root">pivot_root</primary>
896 </indexterm>
897 </listitem>
898 </varlistentry>
899
900 <varlistentry id="prlimit">
901 <term><command>prlimit</command></term>
902 <listitem>
903 <para>Get and set a process' resource limits</para>
904 <indexterm zone="ch-system-util-linux prlimit">
905 <primary sortas="b-prlimit">prlimit</primary>
906 </indexterm>
907 </listitem>
908 </varlistentry>
909
910 <varlistentry id="raw">
911 <term><command>raw</command></term>
912 <listitem>
913 <para>Bind a Linux raw character device to a block device</para>
914 <indexterm zone="ch-system-util-linux raw">
915 <primary sortas="b-raw">raw</primary>
916 </indexterm>
917 </listitem>
918 </varlistentry>
919
920 <varlistentry id="readprofile">
921 <term><command>readprofile</command></term>
922 <listitem>
923 <para>Reads kernel profiling information</para>
924 <indexterm zone="ch-system-util-linux readprofile">
925 <primary sortas="b-readprofile">readprofile</primary>
926 </indexterm>
927 </listitem>
928 </varlistentry>
929
930 <varlistentry id="rename">
931 <term><command>rename</command></term>
932 <listitem>
933 <para>Renames the given files, replacing a given string with
934 another</para>
935 <indexterm zone="ch-system-util-linux rename">
936 <primary sortas="b-rename">rename</primary>
937 </indexterm>
938 </listitem>
939 </varlistentry>
940
941 <varlistentry id="renice">
942 <term><command>renice</command></term>
943 <listitem>
944 <para>Alters the priority of running processes</para>
945 <indexterm zone="ch-system-util-linux renice">
946 <primary sortas="b-renice">renice</primary>
947 </indexterm>
948 </listitem>
949 </varlistentry>
950
951 <varlistentry id="resizepart">
952 <term><command>resizepart</command></term>
953 <listitem>
954 <para>Asks the Linux kernel to resize a partition</para>
955 <indexterm zone="ch-system-util-linux resizepart">
956 <primary sortas="b-resizepart">resizepart</primary>
957 </indexterm>
958 </listitem>
959 </varlistentry>
960
961 <varlistentry id="rev">
962 <term><command>rev</command></term>
963 <listitem>
964 <para>Reverses the lines of a given file</para>
965 <indexterm zone="ch-system-util-linux rev">
966 <primary sortas="b-rev">rev</primary>
967 </indexterm>
968 </listitem>
969 </varlistentry>
970
971 <varlistentry id="rkfill">
972 <term><command>rkfill</command></term>
973 <listitem>
974 <para>Tool for enabling and disabling wireless devices</para>
975 <indexterm zone="ch-system-util-linux rkfill">
976 <primary sortas="b-rkfill">rkfill</primary>
977 </indexterm>
978 </listitem>
979 </varlistentry>
980
981 <varlistentry id="rtcwake">
982 <term><command>rtcwake</command></term>
983 <listitem>
984 <para>Used to enter a system sleep state until specified wakeup
985 time</para>
986 <indexterm zone="ch-system-util-linux rtcwake">
987 <primary sortas="b-rtcwake">rtcwake</primary>
988 </indexterm>
989 </listitem>
990 </varlistentry>
991
992 <varlistentry id="script">
993 <term><command>script</command></term>
994 <listitem>
995 <para>Makes a typescript of a terminal session</para>
996 <indexterm zone="ch-system-util-linux script">
997 <primary sortas="b-script">script</primary>
998 </indexterm>
999 </listitem>
1000 </varlistentry>
1001
1002 <varlistentry id="scriptreplay">
1003 <term><command>scriptreplay</command></term>
1004 <listitem>
1005 <para>Plays back typescripts using timing information</para>
1006 <indexterm zone="ch-system-util-linux scriptreplay">
1007 <primary sortas="b-scriptreplay">scriptreplay</primary>
1008 </indexterm>
1009 </listitem>
1010 </varlistentry>
1011
1012 <varlistentry id="setarch">
1013 <term><command>setarch</command></term>
1014 <listitem>
1015 <para>Changes reported architecture in a new program environment and
1016 sets personality flags</para>
1017 <indexterm zone="ch-system-util-linux setarch">
1018 <primary sortas="b-setarch">setarch</primary>
1019 </indexterm>
1020 </listitem>
1021 </varlistentry>
1022
1023 <varlistentry id="setsid">
1024 <term><command>setsid</command></term>
1025 <listitem>
1026 <para>Runs the given program in a new session</para>
1027 <indexterm zone="ch-system-util-linux setsid">
1028 <primary sortas="b-setsid">setsid</primary>
1029 </indexterm>
1030 </listitem>
1031 </varlistentry>
1032
1033 <varlistentry id="setterm">
1034 <term><command>setterm</command></term>
1035 <listitem>
1036 <para>Sets terminal attributes</para>
1037 <indexterm zone="ch-system-util-linux setterm">
1038 <primary sortas="b-setterm">setterm</primary>
1039 </indexterm>
1040 </listitem>
1041 </varlistentry>
1042
1043 <varlistentry id="sfdisk">
1044 <term><command>sfdisk</command></term>
1045 <listitem>
1046 <para>A disk partition table manipulator</para>
1047 <indexterm zone="ch-system-util-linux sfdisk">
1048 <primary sortas="b-sfdisk">sfdisk</primary>
1049 </indexterm>
1050 </listitem>
1051 </varlistentry>
1052
1053 <varlistentry id="sulogin">
1054 <term><command>sulogin</command></term>
1055 <listitem>
1056 <para>Allows <systemitem class="username">root</systemitem> to log in;
1057 it is normally invoked by <command>init</command> when the system goes
1058 into single user mode</para>
1059 <indexterm zone="ch-system-util-linux sulogin">
1060 <primary sortas="b-sulogin">sulogin</primary>
1061 </indexterm>
1062 </listitem>
1063 </varlistentry>
1064
1065 <varlistentry id="swaplabel">
1066 <term><command>swaplabel</command></term>
1067 <listitem>
1068 <para>Allows to change swaparea UUID and label</para>
1069 <indexterm zone="ch-system-util-linux swaplabel">
1070 <primary sortas="b-swaplabel">swaplabel</primary>
1071 </indexterm>
1072 </listitem>
1073 </varlistentry>
1074
1075 <varlistentry id="swapoff">
1076 <term><command>swapoff</command></term>
1077 <listitem>
1078 <para>Disables devices and files for paging and swapping</para>
1079 <indexterm zone="ch-system-util-linux swapoff">
1080 <primary sortas="b-swapoff">swapoff</primary>
1081 </indexterm>
1082 </listitem>
1083 </varlistentry>
1084
1085 <varlistentry id="swapon">
1086 <term><command>swapon</command></term>
1087 <listitem>
1088 <para>Enables devices and files for paging and swapping and
1089 lists the devices and files currently in use</para>
1090 <indexterm zone="ch-system-util-linux swapon">
1091 <primary sortas="b-swapon">swapon</primary>
1092 </indexterm>
1093 </listitem>
1094 </varlistentry>
1095
1096 <varlistentry id="switch_root">
1097 <term><command>switch_root</command></term>
1098 <listitem>
1099 <para>Switches to another filesystem as the root of the mount tree</para>
1100 <indexterm zone="ch-system-util-linux switch_root">
1101 <primary sortas="b-switch_root">switch_root</primary>
1102 </indexterm>
1103 </listitem>
1104 </varlistentry>
1105
1106 <varlistentry id="tailf">
1107 <term><command>tailf</command></term>
1108 <listitem>
1109 <para>Tracks the growth of a log file; displays the last 10 lines
1110 of a log file, then continues displaying any new entries in the
1111 log file as they are created</para>
1112 <indexterm zone="ch-system-util-linux tailf">
1113 <primary sortas="b-tailf">tailf</primary>
1114 </indexterm>
1115 </listitem>
1116 </varlistentry>
1117
1118 <varlistentry id="taskset">
1119 <term><command>taskset</command></term>
1120 <listitem>
1121 <para>Retrieves or sets a process' CPU affinity</para>
1122 <indexterm zone="ch-system-util-linux taskset">
1123 <primary sortas="b-taskset">taskset</primary>
1124 </indexterm>
1125 </listitem>
1126 </varlistentry>
1127
1128 <varlistentry id="ul">
1129 <term><command>ul</command></term>
1130 <listitem>
1131 <para>A filter for translating underscores into escape sequences
1132 indicating underlining for the terminal in use</para>
1133 <indexterm zone="ch-system-util-linux ul">
1134 <primary sortas="b-ul">ul</primary>
1135 </indexterm>
1136 </listitem>
1137 </varlistentry>
1138
1139 <varlistentry id="umount">
1140 <term><command>umount</command></term>
1141 <listitem>
1142 <para>Disconnects a file system from the system's file tree</para>
1143 <indexterm zone="ch-system-util-linux umount">
1144 <primary sortas="b-umount">umount</primary>
1145 </indexterm>
1146 </listitem>
1147 </varlistentry>
1148
1149 <varlistentry id="uname26">
1150 <term><command>uname26</command></term>
1151 <listitem>
1152 <para>A symbolic link to setarch</para>
1153 <indexterm zone="ch-system-util-linux uname26">
1154 <primary sortas="b-uname26">uname26</primary>
1155 </indexterm>
1156 </listitem>
1157 </varlistentry>
1158
1159 <varlistentry id="unshare">
1160 <term><command>unshare</command></term>
1161 <listitem>
1162 <para>Runs a program with some namespaces unshared from parent</para>
1163 <indexterm zone="ch-system-util-linux unshare">
1164 <primary sortas="b-unshare">unshare</primary>
1165 </indexterm>
1166 </listitem>
1167 </varlistentry>
1168
1169 <varlistentry id="utmpdump">
1170 <term><command>utmpdump</command></term>
1171 <listitem>
1172 <para>Displays the content of the given login file in a more
1173 user-friendly format</para>
1174 <indexterm zone="ch-system-util-linux utmpdump">
1175 <primary sortas="b-utmpdump">utmpdump</primary>
1176 </indexterm>
1177 </listitem>
1178 </varlistentry>
1179
1180 <varlistentry id="uuidd">
1181 <term><command>uuidd</command></term>
1182 <listitem>
1183 <para>A daemon used by the UUID library to generate time-based
1184 UUIDs in a secure and guaranteed-unique fashion</para>
1185 <indexterm zone="ch-system-util-linux uuidd">
1186 <primary sortas="b-uuidd">uuidd</primary>
1187 </indexterm>
1188 </listitem>
1189 </varlistentry>
1190
1191 <varlistentry id="uuidgen">
1192 <term><command>uuidgen</command></term>
1193 <listitem>
1194 <para>Creates new UUIDs. Each new UUID can reasonably be considered
1195 unique among all UUIDs created, on the local system and on other
1196 systems, in the past and in the future</para>
1197 <indexterm zone="ch-system-util-linux uuidgen">
1198 <primary sortas="b-uuidgen">uuidgen</primary>
1199 </indexterm>
1200 </listitem>
1201 </varlistentry>
1202
1203 <varlistentry id="uuidparse">
1204 <term><command>uuidparse</command></term>
1205 <listitem>
1206 <para>An utility to parse unique identifiers</para>
1207 <indexterm zone="ch-system-util-linux uuidparse">
1208 <primary sortas="b-uuidparse">uuidparse</primary>
1209 </indexterm>
1210 </listitem>
1211 </varlistentry>
1212
1213 <varlistentry id="wall">
1214 <term><command>wall</command></term>
1215 <listitem>
1216 <para>Displays the contents of a file or, by default, its standard
1217 input, on the terminals of all currently logged in users</para>
1218 <indexterm zone="ch-system-util-linux wall">
1219 <primary sortas="b-wall">wall</primary>
1220 </indexterm>
1221 </listitem>
1222 </varlistentry>
1223
1224 <varlistentry id="wdctl">
1225 <term><command>wdctl</command></term>
1226 <listitem>
1227 <para>Shows hardware watchdog status</para>
1228 <indexterm zone="ch-system-util-linux wdctl">
1229 <primary sortas="b-wdctl">wdctl</primary>
1230 </indexterm>
1231 </listitem>
1232 </varlistentry>
1233
1234 <varlistentry id="whereis">
1235 <term><command>whereis</command></term>
1236 <listitem>
1237 <para>Reports the location of the binary, source, and man page
1238 for the given command</para>
1239 <indexterm zone="ch-system-util-linux whereis">
1240 <primary sortas="b-whereis">whereis</primary>
1241 </indexterm>
1242 </listitem>
1243 </varlistentry>
1244
1245 <varlistentry id="wipefs">
1246 <term><command>wipefs</command></term>
1247 <listitem>
1248 <para>Wipes a filesystem signature from a device</para>
1249 <indexterm zone="ch-system-util-linux wipefs">
1250 <primary sortas="b-wipefs">wipefs</primary>
1251 </indexterm>
1252 </listitem>
1253 </varlistentry>
1254
1255 <varlistentry id="x86_64">
1256 <term><command>x86_64</command></term>
1257 <listitem>
1258 <para>A symbolic link to setarch</para>
1259 <indexterm zone="ch-system-util-linux x86_64">
1260 <primary sortas="b-x86_64">x86_64</primary>
1261 </indexterm>
1262 </listitem>
1263 </varlistentry>
1264
1265 <varlistentry id="zramctl">
1266 <term><command>zramctl</command></term>
1267 <listitem>
1268 <para>A program to set up and control zram (compressed ram disk)
1269 devices</para>
1270 <indexterm zone="ch-system-util-linux zramctl">
1271 <primary sortas="b-zramctl">zramctl</primary>
1272 </indexterm>
1273 </listitem>
1274 </varlistentry>
1275
1276 <varlistentry id="libblkid">
1277 <term><filename class="libraryfile">libblkid</filename></term>
1278 <listitem>
1279 <para>Contains routines for device identification and token
1280 extraction</para>
1281 <indexterm zone="ch-system-util-linux libblkid">
1282 <primary sortas="c-libblkid">libblkid</primary>
1283 </indexterm>
1284 </listitem>
1285 </varlistentry>
1286
1287 <varlistentry id="libfdisk">
1288 <term><filename class="libraryfile">libfdisk</filename></term>
1289 <listitem>
1290 <para>Contains routines for manipulating partition tables</para>
1291 <indexterm zone="ch-system-util-linux libfdisk">
1292 <primary sortas="c-libfdisk">libfdisk</primary>
1293 </indexterm>
1294 </listitem>
1295 </varlistentry>
1296
1297 <varlistentry id="libmount">
1298 <term><filename class="libraryfile">libmount</filename></term>
1299 <listitem>
1300 <para>Contains routines for block device mounting and
1301 unmounting</para>
1302 <indexterm zone="ch-system-util-linux libmount">
1303 <primary sortas="c-libmount">libmount</primary>
1304 </indexterm>
1305 </listitem>
1306 </varlistentry>
1307
1308 <varlistentry id="libsmartcols">
1309 <term><filename class="libraryfile">libsmartcols</filename></term>
1310 <listitem>
1311 <para>Contains routines for aiding screen output in tabular form</para>
1312 <indexterm zone="ch-system-util-linux libsmartcols">
1313 <primary sortas="c-libsmartcols">libsmartcols</primary>
1314 </indexterm>
1315 </listitem>
1316 </varlistentry>
1317
1318 <varlistentry id="libuuid">
1319 <term><filename class="libraryfile">libuuid</filename></term>
1320 <listitem>
1321 <para>Contains routines for generating unique identifiers for objects
1322 that may be accessible beyond the local system</para>
1323 <indexterm zone="ch-system-util-linux libuuid">
1324 <primary sortas="c-libuuid">libuuid</primary>
1325 </indexterm>
1326 </listitem>
1327 </varlistentry>
1328
1329 </variablelist>
1330
1331 </sect2>
1332
1333</sect1>
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