source: chapter06/util-linux.xml@ a5a3dc6

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Last change on this file since a5a3dc6 was a5a3dc6, checked in by Pierre Labastie <pieere@…>, 4 years ago

Do not remove inexistent symlinks in util-linux
+ fix some formatting

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@11807 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

  • Property mode set to 100644
File size: 46.4 KB
Line 
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<!-- those symlinks are not created anymore
64 <para revision="systemd">Remove the earlier created symlinks:</para>
65
66<screen revision="systemd"><userinput remap="pre">rm -vf /usr/include/{blkid,libmount,uuid}</userinput></screen>
67-->
68 <para>Prepare Util-linux for compilation:</para>
69
70<screen revision="sysv"><userinput remap="configure">./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
71 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
72 --disable-chfn-chsh \
73 --disable-login \
74 --disable-nologin \
75 --disable-su \
76 --disable-setpriv \
77 --disable-runuser \
78 --disable-pylibmount \
79 --disable-static \
80 --without-python \
81 --without-systemd \
82 --without-systemdsystemunitdir</userinput></screen>
83
84<screen revision="systemd"><userinput remap="configure">./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
85 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
86 --disable-chfn-chsh \
87 --disable-login \
88 --disable-nologin \
89 --disable-su \
90 --disable-setpriv \
91 --disable-runuser \
92 --disable-pylibmount \
93 --disable-static \
94 --without-python</userinput></screen>
95
96 <para>The --disable and --without options prevent warnings about
97 building components that require packages not in LFS or are
98 inconsistent with programs installed by other packages.</para>
99
100 <para>Compile the package:</para>
101
102<screen><userinput remap="make">make</userinput></screen>
103
104 <para>If desired, run the test suite as a non-root user:</para>
105
106 <warning><para>Running the test suite as the root user can be harmful to
107 your system. To run it, the CONFIG_SCSI_DEBUG option for the kernel must
108 be available in the currently running system, and must be built as a
109 module. Building it into the kernel will prevent booting. For complete
110 coverage, other BLFS packages must be installed. If desired, this test can
111 be run after rebooting into the completed LFS system and running:</para>
112
113<screen role="nodump"><userinput>bash tests/run.sh --srcdir=$PWD --builddir=$PWD</userinput></screen>
114 </warning>
115
116<screen><userinput remap="test">chown -Rv nobody .
117su nobody -s /bin/bash -c "PATH=$PATH make -k check"</userinput></screen>
118
119 <para>Install the package:</para>
120
121<screen><userinput remap="install">make install</userinput></screen>
122
123 </sect2>
124
125 <sect2 id="contents-utillinux" role="content">
126 <title>Contents of Util-linux</title>
127
128 <segmentedlist>
129 <segtitle>Installed programs</segtitle>
130 <segtitle>Installed libraries</segtitle>
131 <segtitle>Installed directories</segtitle>
132
133 <seglistitem>
134 <seg>addpart, agetty, blkdiscard, blkid, blkzone, blockdev, cal, cfdisk, chcpu,
135 chmem, choom, chrt, col, colcrt, colrm, column, ctrlaltdel, delpart, dmesg,
136 eject, fallocate, fdformat, fdisk, fincore, findfs, findmnt, flock, fsck,
137 fsck.cramfs, fsck.minix, fsfreeze, fstrim, getopt, hexdump, hwclock,
138 i386, ionice, ipcmk, ipcrm, ipcs, isosize, kill, last, lastb (link to
139 last), ldattach, linux32, linux64, logger, look, losetup, lsblk, lscpu,
140 lsipc, lslocks, lslogins, lsmem, lsns, mcookie, mesg, mkfs, mkfs.bfs, mkfs.cramfs, mkfs.minix, mkswap,
141 more, mount, mountpoint, namei, nsenter, partx, pivot_root, prlimit, raw,
142 readprofile, rename, renice, resizepart, rev, rfkill, rtcwake, script,
143 scriptreplay, setarch, setsid, setterm, sfdisk, sulogin, swaplabel,
144 swapoff (link to swapon), swapon, switch_root, taskset, ul,
145 umount, uname26, unshare, utmpdump, uuidd, uuidgen, uuidparse, wall, wdctl, whereis,
146 wipefs, x86_64, and zramctl</seg>
147 <seg>libblkid.so, libfdisk.so, libmount.so,
148 libsmartcols.so, and libuuid.so</seg>
149 <seg>/usr/include/blkid,
150 /usr/include/libfdisk,
151 /usr/include/libmount,
152 /usr/include/libsmartcols,
153 /usr/include/uuid,
154 /usr/share/doc/util-linux-&util-linux-version;,
155 and /var/lib/hwclock</seg>
156 </seglistitem>
157 </segmentedlist>
158
159 <variablelist>
160 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
161 <?dbfo list-presentation="list"?>
162 <?dbhtml list-presentation="table"?>
163
164 <varlistentry id="addpart">
165 <term><command>addpart</command></term>
166 <listitem>
167 <para>Informs the Linux kernel of new partitions</para>
168 <indexterm zone="ch-system-util-linux addpart">
169 <primary sortas="b-addpart">addpart</primary>
170 </indexterm>
171 </listitem>
172 </varlistentry>
173
174 <varlistentry id="agetty">
175 <term><command>agetty</command></term>
176 <listitem>
177 <para>Opens a tty port, prompts for a login name,
178 and then invokes the <command>login</command> program</para>
179 <indexterm zone="ch-system-util-linux agetty">
180 <primary sortas="b-agetty">agetty</primary>
181 </indexterm>
182 </listitem>
183 </varlistentry>
184
185 <varlistentry id="blkdiscard">
186 <term><command>blkdiscard</command></term>
187 <listitem>
188 <para>Discards sectors on a device</para>
189 <indexterm zone="ch-system-util-linux blkdiscard">
190 <primary sortas="b-blkdiscard">blkdiscard</primary>
191 </indexterm>
192 </listitem>
193 </varlistentry>
194
195 <varlistentry id="blkid">
196 <term><command>blkid</command></term>
197 <listitem>
198 <para>A command line utility to locate and print block device
199 attributes</para>
200 <indexterm zone="ch-system-util-linux blkid">
201 <primary sortas="b-blkid">blkid</primary>
202 </indexterm>
203 </listitem>
204 </varlistentry>
205
206 <varlistentry id="blkzone">
207 <term><command>blkzone</command></term>
208 <listitem>
209 <para>Runs zone command on the given block device</para>
210 <indexterm zone="ch-system-util-linux blkzone">
211 <primary sortas="b-blkzone">blkzone</primary>
212 </indexterm>
213 </listitem>
214 </varlistentry>
215
216 <varlistentry id="blockdev">
217 <term><command>blockdev</command></term>
218 <listitem>
219 <para>Allows users to call block device ioctls from the command
220 line</para>
221 <indexterm zone="ch-system-util-linux blockdev">
222 <primary sortas="b-blockdev">blockdev</primary>
223 </indexterm>
224 </listitem>
225 </varlistentry>
226
227 <varlistentry id="cal">
228 <term><command>cal</command></term>
229 <listitem>
230 <para>Displays a simple calendar</para>
231 <indexterm zone="ch-system-util-linux cal">
232 <primary sortas="b-cal">cal</primary>
233 </indexterm>
234 </listitem>
235 </varlistentry>
236
237 <varlistentry id="cfdisk">
238 <term><command>cfdisk</command></term>
239 <listitem>
240 <para>Manipulates the partition table of the given device</para>
241 <indexterm zone="ch-system-util-linux cfdisk">
242 <primary sortas="b-cfdisk">cfdisk</primary>
243 </indexterm>
244 </listitem>
245 </varlistentry>
246
247 <varlistentry id="chcpu">
248 <term><command>chcpu</command></term>
249 <listitem>
250 <para>Modifies the state of CPUs</para>
251 <indexterm zone="ch-system-util-linux chcpu">
252 <primary sortas="b-chcpu">chcpu</primary>
253 </indexterm>
254 </listitem>
255 </varlistentry>
256
257 <varlistentry id="chmem">
258 <term><command>chmem</command></term>
259 <listitem>
260 <para>Configures memory</para>
261 <indexterm zone="ch-system-util-linux chmem">
262 <primary sortas="b-chmem">chmem</primary>
263 </indexterm>
264 </listitem>
265 </varlistentry>
266
267 <varlistentry id="choom">
268 <term><command>choom</command></term>
269 <listitem>
270 <para>Displays and adjusts OOM-killer score</para>
271 <indexterm zone="ch-system-util-linux choom">
272 <primary sortas="b-choom">choom</primary>
273 </indexterm>
274 </listitem>
275 </varlistentry>
276
277 <varlistentry id="chrt">
278 <term><command>chrt</command></term>
279 <listitem>
280 <para>Manipulates real-time attributes of a process</para>
281 <indexterm zone="ch-system-util-linux chrt">
282 <primary sortas="b-chrt">chrt</primary>
283 </indexterm>
284 </listitem>
285 </varlistentry>
286
287 <varlistentry id="col">
288 <term><command>col</command></term>
289 <listitem>
290 <para>Filters out reverse line feeds</para>
291 <indexterm zone="ch-system-util-linux col">
292 <primary sortas="b-col">col</primary>
293 </indexterm>
294 </listitem>
295 </varlistentry>
296
297 <varlistentry id="colcrt">
298 <term><command>colcrt</command></term>
299 <listitem>
300 <para>Filters <command>nroff</command> output for terminals
301 that lack some capabilities, such as overstriking and half-lines</para>
302 <indexterm zone="ch-system-util-linux colcrt">
303 <primary sortas="b-colcrt">colcrt</primary>
304 </indexterm>
305 </listitem>
306 </varlistentry>
307
308 <varlistentry id="colrm">
309 <term><command>colrm</command></term>
310 <listitem>
311 <para>Filters out the given columns</para>
312 <indexterm zone="ch-system-util-linux colrm">
313 <primary sortas="b-colrm">colrm</primary>
314 </indexterm>
315 </listitem>
316 </varlistentry>
317
318 <varlistentry id="column">
319 <term><command>column</command></term>
320 <listitem>
321 <para>Formats a given file into multiple columns</para>
322 <indexterm zone="ch-system-util-linux column">
323 <primary sortas="b-column">column</primary>
324 </indexterm>
325 </listitem>
326 </varlistentry>
327
328 <varlistentry id="ctrlaltdel">
329 <term><command>ctrlaltdel</command></term>
330 <listitem>
331 <para>Sets the function of the Ctrl+Alt+Del key combination to a
332 hard or a soft reset</para>
333 <indexterm zone="ch-system-util-linux ctrlaltdel">
334 <primary sortas="b-ctrlaltdel">ctrlaltdel</primary>
335 </indexterm>
336 </listitem>
337 </varlistentry>
338
339 <varlistentry id="delpart">
340 <term><command>delpart</command></term>
341 <listitem>
342 <para>Asks the Linux kernel to remove a partition</para>
343 <indexterm zone="ch-system-util-linux delpart">
344 <primary sortas="b-delpart">delpart</primary>
345 </indexterm>
346 </listitem>
347 </varlistentry>
348
349 <varlistentry id="dmesg">
350 <term><command>dmesg</command></term>
351 <listitem>
352 <para>Dumps the kernel boot messages</para>
353 <indexterm zone="ch-system-util-linux dmesg">
354 <primary sortas="b-dmesg">dmesg</primary>
355 </indexterm>
356 </listitem>
357 </varlistentry>
358
359 <varlistentry id="eject">
360 <term><command>eject</command></term>
361 <listitem>
362 <para>Ejects removable media</para>
363 <indexterm zone="ch-system-util-linux eject">
364 <primary sortas="b-eject">eject</primary>
365 </indexterm>
366 </listitem>
367 </varlistentry>
368
369 <varlistentry id="fallocate">
370 <term><command>fallocate</command></term>
371 <listitem>
372 <para>Preallocates space to a file</para>
373 <indexterm zone="ch-system-util-linux fallocate">
374 <primary sortas="b-fallocate">fallocate</primary>
375 </indexterm>
376 </listitem>
377 </varlistentry>
378
379 <varlistentry id="fdformat">
380 <term><command>fdformat</command></term>
381 <listitem>
382 <para>Low-level formats a floppy disk</para>
383 <indexterm zone="ch-system-util-linux fdformat">
384 <primary sortas="b-fdformat">fdformat</primary>
385 </indexterm>
386 </listitem>
387 </varlistentry>
388
389 <varlistentry id="fdisk">
390 <term><command>fdisk</command></term>
391 <listitem>
392 <para>Manipulates the partition table of the given device</para>
393 <indexterm zone="ch-system-util-linux fdisk">
394 <primary sortas="b-fdisk">fdisk</primary>
395 </indexterm>
396 </listitem>
397 </varlistentry>
398
399 <varlistentry id="fincore">
400 <term><command>fincore</command></term>
401 <listitem>
402 <para>Counts pages of file contents in core</para>
403 <indexterm zone="ch-system-util-linux fincore">
404 <primary sortas="b-fincore">fincore</primary>
405 </indexterm>
406 </listitem>
407 </varlistentry>
408
409 <varlistentry id="findfs">
410 <term><command>findfs</command></term>
411 <listitem>
412 <para>Finds a file system by label or Universally Unique Identifier
413 (UUID)</para>
414 <indexterm zone="ch-system-util-linux findfs">
415 <primary sortas="b-findfs">findfs</primary>
416 </indexterm>
417 </listitem>
418 </varlistentry>
419
420 <varlistentry id="findmnt">
421 <term><command>findmnt</command></term>
422 <listitem>
423 <para>Is a command line interface to the libmount library
424 for work with mountinfo, fstab and mtab files</para>
425 <indexterm zone="ch-system-util-linux findmnt">
426 <primary sortas="b-findmnt">findmnt</primary>
427 </indexterm>
428 </listitem>
429 </varlistentry>
430
431 <varlistentry id="flock">
432 <term><command>flock</command></term>
433 <listitem>
434 <para>Acquires a file lock and then executes a command with the lock
435 held</para>
436 <indexterm zone="ch-system-util-linux flock">
437 <primary sortas="b-flock">flock</primary>
438 </indexterm>
439 </listitem>
440 </varlistentry>
441
442 <varlistentry id="fsck">
443 <term><command>fsck</command></term>
444 <listitem>
445 <para>Is used to check, and optionally repair, file systems</para>
446 <indexterm zone="ch-system-util-linux fsck">
447 <primary sortas="b-fsck">fsck</primary>
448 </indexterm>
449 </listitem>
450 </varlistentry>
451
452 <varlistentry id="fsck.cramfs">
453 <term><command>fsck.cramfs</command></term>
454 <listitem>
455 <para>Performs a consistency check on the Cramfs file system on the
456 given device</para>
457 <indexterm zone="ch-system-util-linux fsck.cramfs">
458 <primary sortas="b-fsck.cramfs">fsck.cramfs</primary>
459 </indexterm>
460 </listitem>
461 </varlistentry>
462
463 <varlistentry id="fsck.minix">
464 <term><command>fsck.minix</command></term>
465 <listitem>
466 <para>Performs a consistency check on the Minix file system on the
467 given device</para>
468 <indexterm zone="ch-system-util-linux fsck.minix">
469 <primary sortas="b-fsck.minix">fsck.minix</primary>
470 </indexterm>
471 </listitem>
472 </varlistentry>
473
474 <varlistentry id="fsfreeze">
475 <term><command>fsfreeze</command></term>
476 <listitem>
477 <para>Is a very simple wrapper around FIFREEZE/FITHAW ioctl
478 kernel driver operations</para>
479 <indexterm zone="ch-system-util-linux fsfreeze">
480 <primary sortas="b-fsfreeze">fsfreeze</primary>
481 </indexterm>
482 </listitem>
483 </varlistentry>
484
485 <varlistentry id="fstrim">
486 <term><command>fstrim</command></term>
487 <listitem>
488 <para>Discards unused blocks on a mounted filesystem</para>
489 <indexterm zone="ch-system-util-linux fstrim">
490 <primary sortas="b-fstrim">fstrim</primary>
491 </indexterm>
492 </listitem>
493 </varlistentry>
494
495 <varlistentry id="getopt">
496 <term><command>getopt</command></term>
497 <listitem>
498 <para>Parses options in the given command line</para>
499 <indexterm zone="ch-system-util-linux getopt">
500 <primary sortas="b-getopt">getopt</primary>
501 </indexterm>
502 </listitem>
503 </varlistentry>
504
505 <varlistentry id="hexdump">
506 <term><command>hexdump</command></term>
507 <listitem>
508 <para>Dumps the given file in hexadecimal or in another given
509 format</para>
510 <indexterm zone="ch-system-util-linux hexdump">
511 <primary sortas="b-hexdump">hexdump</primary>
512 </indexterm>
513 </listitem>
514 </varlistentry>
515
516 <varlistentry id="hwclock">
517 <term><command>hwclock</command></term>
518 <listitem>
519 <para>Reads or sets the system's hardware clock, also called
520 the Real-Time Clock (RTC) or Basic Input-Output System (BIOS)
521 clock</para>
522 <indexterm zone="ch-system-util-linux hwclock">
523 <primary sortas="b-hwclock">hwclock</primary>
524 </indexterm>
525 </listitem>
526 </varlistentry>
527
528 <varlistentry id="i386">
529 <term><command>i386</command></term>
530 <listitem>
531 <para>A symbolic link to setarch</para>
532 <indexterm zone="ch-system-util-linux i386">
533 <primary sortas="b-i386">i386</primary>
534 </indexterm>
535 </listitem>
536 </varlistentry>
537
538 <varlistentry id="ionice">
539 <term><command>ionice</command></term>
540 <listitem>
541 <para>Gets or sets the io scheduling class and priority for a program</para>
542 <indexterm zone="ch-system-util-linux ionice">
543 <primary sortas="b-ionice">ionice</primary>
544 </indexterm>
545 </listitem>
546 </varlistentry>
547
548 <varlistentry id="ipcmk">
549 <term><command>ipcmk</command></term>
550 <listitem>
551 <para>Creates various IPC resources</para>
552 <indexterm zone="ch-system-util-linux ipcmk">
553 <primary sortas="b-ipcmk">ipcmk</primary>
554 </indexterm>
555 </listitem>
556 </varlistentry>
557
558 <varlistentry id="ipcrm">
559 <term><command>ipcrm</command></term>
560 <listitem>
561 <para>Removes the given Inter-Process Communication (IPC) resource</para>
562 <indexterm zone="ch-system-util-linux ipcrm">
563 <primary sortas="b-ipcrm">ipcrm</primary>
564 </indexterm>
565 </listitem>
566 </varlistentry>
567
568 <varlistentry id="ipcs">
569 <term><command>ipcs</command></term>
570 <listitem>
571 <para>Provides IPC status information</para>
572 <indexterm zone="ch-system-util-linux ipcs">
573 <primary sortas="b-ipcs">ipcs</primary>
574 </indexterm>
575 </listitem>
576 </varlistentry>
577
578 <varlistentry id="isosize">
579 <term><command>isosize</command></term>
580 <listitem>
581 <para>Reports the size of an iso9660 file system</para>
582 <indexterm zone="ch-system-util-linux isosize">
583 <primary sortas="b-isosize">isosize</primary>
584 </indexterm>
585 </listitem>
586 </varlistentry>
587
588 <varlistentry id="kill">
589 <term><command>kill</command></term>
590 <listitem>
591 <para>Sends signals to processes</para>
592 <indexterm zone="ch-system-util-linux kill">
593 <primary sortas="b-kill">kill</primary>
594 </indexterm>
595 </listitem>
596 </varlistentry>
597
598 <varlistentry id="last">
599 <term><command>last</command></term>
600 <listitem>
601 <para>Shows which users last logged in (and out), searching back
602 through the <filename>/var/log/wtmp</filename> file; it also shows
603 system boots, shutdowns, and run-level changes</para>
604 <indexterm zone="ch-system-util-linux last">
605 <primary sortas="b-last">last</primary>
606 </indexterm>
607 </listitem>
608 </varlistentry>
609
610 <varlistentry id="lastb">
611 <term><command>lastb</command></term>
612 <listitem>
613 <para>Shows the failed login attempts, as logged in
614 <filename>/var/log/btmp</filename></para>
615 <indexterm zone="ch-system-util-linux lastb">
616 <primary sortas="b-lastb">lastb</primary>
617 </indexterm>
618 </listitem>
619 </varlistentry>
620
621 <varlistentry id="ldattach">
622 <term><command>ldattach</command></term>
623 <listitem>
624 <para>Attaches a line discipline to a serial line</para>
625 <indexterm zone="ch-system-util-linux ldattach">
626 <primary sortas="b-ldattach">ldattach</primary>
627 </indexterm>
628 </listitem>
629 </varlistentry>
630
631 <varlistentry id="linux32">
632 <term><command>linux32</command></term>
633 <listitem>
634 <para>A symbolic link to setarch</para>
635 <indexterm zone="ch-system-util-linux linux32">
636 <primary sortas="b-linux32">linux32</primary>
637 </indexterm>
638 </listitem>
639 </varlistentry>
640
641 <varlistentry id="linux64">
642 <term><command>linux64</command></term>
643 <listitem>
644 <para>A symbolic link to setarch</para>
645 <indexterm zone="ch-system-util-linux linux64">
646 <primary sortas="b-linux64">linux64</primary>
647 </indexterm>
648 </listitem>
649 </varlistentry>
650
651 <varlistentry id="logger">
652 <term><command>logger</command></term>
653 <listitem>
654 <para>Enters the given message into the system log</para>
655 <indexterm zone="ch-system-util-linux logger">
656 <primary sortas="b-logger">logger</primary>
657 </indexterm>
658 </listitem>
659 </varlistentry>
660
661 <varlistentry id="look">
662 <term><command>look</command></term>
663 <listitem>
664 <para>Displays lines that begin with the given string</para>
665 <indexterm zone="ch-system-util-linux look">
666 <primary sortas="b-look">look</primary>
667 </indexterm>
668 </listitem>
669 </varlistentry>
670
671 <varlistentry id="losetup">
672 <term><command>losetup</command></term>
673 <listitem>
674 <para>Sets up and controls loop devices</para>
675 <indexterm zone="ch-system-util-linux losetup">
676 <primary sortas="b-losetup">losetup</primary>
677 </indexterm>
678 </listitem>
679 </varlistentry>
680
681 <varlistentry id="lsblk">
682 <term><command>lsblk</command></term>
683 <listitem>
684 <para>Lists information about all or selected block devices in
685 a tree-like format</para>
686 <indexterm zone="ch-system-util-linux lsblk">
687 <primary sortas="b-lsblk">lsblk</primary>
688 </indexterm>
689 </listitem>
690 </varlistentry>
691
692 <varlistentry id="lscpu">
693 <term><command>lscpu</command></term>
694 <listitem>
695 <para>Prints CPU architecture information</para>
696 <indexterm zone="ch-system-util-linux lscpu">
697 <primary sortas="b-lscpu">lscpu</primary>
698 </indexterm>
699 </listitem>
700 </varlistentry>
701
702 <varlistentry id="lsipc">
703 <term><command>lsipc</command></term>
704 <listitem>
705 <para>Prints information on IPC facilities currently employed
706 in the system</para>
707 <indexterm zone="ch-system-util-linux lsipc">
708 <primary sortas="b-lsipc">lsipc</primary>
709 </indexterm>
710 </listitem>
711 </varlistentry>
712
713 <varlistentry id="lslocks">
714 <term><command>lslocks</command></term>
715 <listitem>
716 <para>Lists local system locks</para>
717 <indexterm zone="ch-system-util-linux lslocks">
718 <primary sortas="b-lslocks">lslocks</primary>
719 </indexterm>
720 </listitem>
721 </varlistentry>
722
723 <varlistentry id="lslogins">
724 <term><command>lslogins</command></term>
725 <listitem>
726 <para>Lists information about users, groups and system accounts</para>
727 <indexterm zone="ch-system-util-linux lslogins">
728 <primary sortas="b-lslogins">lslogins</primary>
729 </indexterm>
730 </listitem>
731 </varlistentry>
732
733 <varlistentry id="lsmem">
734 <term><command>lsmem</command></term>
735 <listitem>
736 <para>Lists the ranges of available memory with their online
737 status</para>
738 <indexterm zone="ch-system-util-linux lsmem">
739 <primary sortas="b-lsmem">lsmem</primary>
740 </indexterm>
741 </listitem>
742 </varlistentry>
743
744 <varlistentry id="lsns">
745 <term><command>lsns</command></term>
746 <listitem>
747 <para>Lists namespaces</para>
748 <indexterm zone="ch-system-util-linux lsns">
749 <primary sortas="b-lsns">lsns</primary>
750 </indexterm>
751 </listitem>
752 </varlistentry>
753
754 <varlistentry id="mcookie">
755 <term><command>mcookie</command></term>
756 <listitem>
757 <para>Generates magic cookies (128-bit random hexadecimal numbers) for
758 <command>xauth</command></para>
759 <indexterm zone="ch-system-util-linux mcookie">
760 <primary sortas="b-mcookie">mcookie</primary>
761 </indexterm>
762 </listitem>
763 </varlistentry>
764
765 <varlistentry id="mesg">
766 <term><command>mesg</command></term>
767 <listitem>
768 <para>Controls whether other users can send messages to the current
769 user's terminal</para>
770 <indexterm zone="ch-system-util-linux mesg">
771 <primary sortas="b-mesg">mesg</primary>
772 </indexterm>
773 </listitem>
774 </varlistentry>
775
776 <varlistentry id="mkfs">
777 <term><command>mkfs</command></term>
778 <listitem>
779 <para>Builds a file system on a device (usually a hard disk
780 partition)</para>
781 <indexterm zone="ch-system-util-linux mkfs">
782 <primary sortas="b-mkfs">mkfs</primary>
783 </indexterm>
784 </listitem>
785 </varlistentry>
786
787 <varlistentry id="mkfs.bfs">
788 <term><command>mkfs.bfs</command></term>
789 <listitem>
790 <para>Creates a Santa Cruz Operations (SCO) bfs file system</para>
791 <indexterm zone="ch-system-util-linux mkfs.bfs">
792 <primary sortas="b-mkfs.bfs">mkfs.bfs</primary>
793 </indexterm>
794 </listitem>
795 </varlistentry>
796
797 <varlistentry id="mkfs.cramfs">
798 <term><command>mkfs.cramfs</command></term>
799 <listitem>
800 <para>Creates a cramfs file system</para>
801 <indexterm zone="ch-system-util-linux mkfs.cramfs">
802 <primary sortas="b-mkfs.cramfs">mkfs.cramfs</primary>
803 </indexterm>
804 </listitem>
805 </varlistentry>
806
807 <varlistentry id="mkfs.minix">
808 <term><command>mkfs.minix</command></term>
809 <listitem>
810 <para>Creates a Minix file system</para>
811 <indexterm zone="ch-system-util-linux mkfs.minix">
812 <primary sortas="b-mkfs.minix">mkfs.minix</primary>
813 </indexterm>
814 </listitem>
815 </varlistentry>
816
817 <varlistentry id="mkswap">
818 <term><command>mkswap</command></term>
819 <listitem>
820 <para>Initializes the given device or file to be used as a swap
821 area</para>
822 <indexterm zone="ch-system-util-linux mkswap">
823 <primary sortas="b-mkswap">mkswap</primary>
824 </indexterm>
825 </listitem>
826 </varlistentry>
827
828 <varlistentry id="more">
829 <term><command>more</command></term>
830 <listitem>
831 <para>A filter for paging through text one screen at a time</para>
832 <indexterm zone="ch-system-util-linux more">
833 <primary sortas="b-more">more</primary>
834 </indexterm>
835 </listitem>
836 </varlistentry>
837
838 <varlistentry id="mount">
839 <term><command>mount</command></term>
840 <listitem>
841 <para>Attaches the file system on the given device to a specified
842 directory in the file-system tree</para>
843 <indexterm zone="ch-system-util-linux mount">
844 <primary sortas="b-mount">mount</primary>
845 </indexterm>
846 </listitem>
847 </varlistentry>
848
849 <varlistentry id="mountpoint">
850 <term><command>mountpoint</command></term>
851 <listitem>
852 <para>Checks if the directory is a mountpoint</para>
853 <indexterm zone="ch-system-util-linux mountpoint">
854 <primary sortas="b-mountpoint">mountpoint</primary>
855 </indexterm>
856 </listitem>
857 </varlistentry>
858
859 <varlistentry id="namei">
860 <term><command>namei</command></term>
861 <listitem>
862 <para>Shows the symbolic links in the given pathnames</para>
863 <indexterm zone="ch-system-util-linux namei">
864 <primary sortas="b-namei">namei</primary>
865 </indexterm>
866 </listitem>
867 </varlistentry>
868
869 <varlistentry id="nsenter">
870 <term><command>nsenter</command></term>
871 <listitem>
872 <para>Runs a program with namespaces of other processes</para>
873 <indexterm zone="ch-system-util-linux nsenter">
874 <primary sortas="b-nsenter">nsenter</primary>
875 </indexterm>
876 </listitem>
877 </varlistentry>
878
879 <varlistentry id="partx">
880 <term><command>partx</command></term>
881 <listitem>
882 <para>Tells the kernel about the presence and numbering of on-disk
883 partitions</para>
884 <indexterm zone="ch-system-util-linux partx">
885 <primary sortas="b-partx">partx</primary>
886 </indexterm>
887 </listitem>
888 </varlistentry>
889
890 <varlistentry id="pivot_root">
891 <term><command>pivot_root</command></term>
892 <listitem>
893 <para>Makes the given file system the new root file system of the
894 current process</para>
895 <indexterm zone="ch-system-util-linux pivot_root">
896 <primary sortas="b-pivot_root">pivot_root</primary>
897 </indexterm>
898 </listitem>
899 </varlistentry>
900
901 <varlistentry id="prlimit">
902 <term><command>prlimit</command></term>
903 <listitem>
904 <para>Get and set a process' resource limits</para>
905 <indexterm zone="ch-system-util-linux prlimit">
906 <primary sortas="b-prlimit">prlimit</primary>
907 </indexterm>
908 </listitem>
909 </varlistentry>
910
911 <varlistentry id="raw">
912 <term><command>raw</command></term>
913 <listitem>
914 <para>Bind a Linux raw character device to a block device</para>
915 <indexterm zone="ch-system-util-linux raw">
916 <primary sortas="b-raw">raw</primary>
917 </indexterm>
918 </listitem>
919 </varlistentry>
920
921 <varlistentry id="readprofile">
922 <term><command>readprofile</command></term>
923 <listitem>
924 <para>Reads kernel profiling information</para>
925 <indexterm zone="ch-system-util-linux readprofile">
926 <primary sortas="b-readprofile">readprofile</primary>
927 </indexterm>
928 </listitem>
929 </varlistentry>
930
931 <varlistentry id="rename">
932 <term><command>rename</command></term>
933 <listitem>
934 <para>Renames the given files, replacing a given string with
935 another</para>
936 <indexterm zone="ch-system-util-linux rename">
937 <primary sortas="b-rename">rename</primary>
938 </indexterm>
939 </listitem>
940 </varlistentry>
941
942 <varlistentry id="renice">
943 <term><command>renice</command></term>
944 <listitem>
945 <para>Alters the priority of running processes</para>
946 <indexterm zone="ch-system-util-linux renice">
947 <primary sortas="b-renice">renice</primary>
948 </indexterm>
949 </listitem>
950 </varlistentry>
951
952 <varlistentry id="resizepart">
953 <term><command>resizepart</command></term>
954 <listitem>
955 <para>Asks the Linux kernel to resize a partition</para>
956 <indexterm zone="ch-system-util-linux resizepart">
957 <primary sortas="b-resizepart">resizepart</primary>
958 </indexterm>
959 </listitem>
960 </varlistentry>
961
962 <varlistentry id="rev">
963 <term><command>rev</command></term>
964 <listitem>
965 <para>Reverses the lines of a given file</para>
966 <indexterm zone="ch-system-util-linux rev">
967 <primary sortas="b-rev">rev</primary>
968 </indexterm>
969 </listitem>
970 </varlistentry>
971
972 <varlistentry id="rkfill">
973 <term><command>rkfill</command></term>
974 <listitem>
975 <para>Tool for enabling and disabling wireless devices</para>
976 <indexterm zone="ch-system-util-linux rkfill">
977 <primary sortas="b-rkfill">rkfill</primary>
978 </indexterm>
979 </listitem>
980 </varlistentry>
981
982 <varlistentry id="rtcwake">
983 <term><command>rtcwake</command></term>
984 <listitem>
985 <para>Used to enter a system sleep state until specified wakeup
986 time</para>
987 <indexterm zone="ch-system-util-linux rtcwake">
988 <primary sortas="b-rtcwake">rtcwake</primary>
989 </indexterm>
990 </listitem>
991 </varlistentry>
992
993 <varlistentry id="script">
994 <term><command>script</command></term>
995 <listitem>
996 <para>Makes a typescript of a terminal session</para>
997 <indexterm zone="ch-system-util-linux script">
998 <primary sortas="b-script">script</primary>
999 </indexterm>
1000 </listitem>
1001 </varlistentry>
1002
1003 <varlistentry id="scriptreplay">
1004 <term><command>scriptreplay</command></term>
1005 <listitem>
1006 <para>Plays back typescripts using timing information</para>
1007 <indexterm zone="ch-system-util-linux scriptreplay">
1008 <primary sortas="b-scriptreplay">scriptreplay</primary>
1009 </indexterm>
1010 </listitem>
1011 </varlistentry>
1012
1013 <varlistentry id="setarch">
1014 <term><command>setarch</command></term>
1015 <listitem>
1016 <para>Changes reported architecture in a new program environment and
1017 sets personality flags</para>
1018 <indexterm zone="ch-system-util-linux setarch">
1019 <primary sortas="b-setarch">setarch</primary>
1020 </indexterm>
1021 </listitem>
1022 </varlistentry>
1023
1024 <varlistentry id="setsid">
1025 <term><command>setsid</command></term>
1026 <listitem>
1027 <para>Runs the given program in a new session</para>
1028 <indexterm zone="ch-system-util-linux setsid">
1029 <primary sortas="b-setsid">setsid</primary>
1030 </indexterm>
1031 </listitem>
1032 </varlistentry>
1033
1034 <varlistentry id="setterm">
1035 <term><command>setterm</command></term>
1036 <listitem>
1037 <para>Sets terminal attributes</para>
1038 <indexterm zone="ch-system-util-linux setterm">
1039 <primary sortas="b-setterm">setterm</primary>
1040 </indexterm>
1041 </listitem>
1042 </varlistentry>
1043
1044 <varlistentry id="sfdisk">
1045 <term><command>sfdisk</command></term>
1046 <listitem>
1047 <para>A disk partition table manipulator</para>
1048 <indexterm zone="ch-system-util-linux sfdisk">
1049 <primary sortas="b-sfdisk">sfdisk</primary>
1050 </indexterm>
1051 </listitem>
1052 </varlistentry>
1053
1054 <varlistentry id="sulogin">
1055 <term><command>sulogin</command></term>
1056 <listitem>
1057 <para>Allows <systemitem class="username">root</systemitem> to log in;
1058 it is normally invoked by <command>init</command> when the system goes
1059 into single user mode</para>
1060 <indexterm zone="ch-system-util-linux sulogin">
1061 <primary sortas="b-sulogin">sulogin</primary>
1062 </indexterm>
1063 </listitem>
1064 </varlistentry>
1065
1066 <varlistentry id="swaplabel">
1067 <term><command>swaplabel</command></term>
1068 <listitem>
1069 <para>Allows to change swaparea UUID and label</para>
1070 <indexterm zone="ch-system-util-linux swaplabel">
1071 <primary sortas="b-swaplabel">swaplabel</primary>
1072 </indexterm>
1073 </listitem>
1074 </varlistentry>
1075
1076 <varlistentry id="swapoff">
1077 <term><command>swapoff</command></term>
1078 <listitem>
1079 <para>Disables devices and files for paging and swapping</para>
1080 <indexterm zone="ch-system-util-linux swapoff">
1081 <primary sortas="b-swapoff">swapoff</primary>
1082 </indexterm>
1083 </listitem>
1084 </varlistentry>
1085
1086 <varlistentry id="swapon">
1087 <term><command>swapon</command></term>
1088 <listitem>
1089 <para>Enables devices and files for paging and swapping and
1090 lists the devices and files currently in use</para>
1091 <indexterm zone="ch-system-util-linux swapon">
1092 <primary sortas="b-swapon">swapon</primary>
1093 </indexterm>
1094 </listitem>
1095 </varlistentry>
1096
1097 <varlistentry id="switch_root">
1098 <term><command>switch_root</command></term>
1099 <listitem>
1100 <para>Switches to another filesystem as the root of the mount tree</para>
1101 <indexterm zone="ch-system-util-linux switch_root">
1102 <primary sortas="b-switch_root">switch_root</primary>
1103 </indexterm>
1104 </listitem>
1105 </varlistentry>
1106
1107 <varlistentry id="tailf">
1108 <term><command>tailf</command></term>
1109 <listitem>
1110 <para>Tracks the growth of a log file; displays the last 10 lines
1111 of a log file, then continues displaying any new entries in the
1112 log file as they are created</para>
1113 <indexterm zone="ch-system-util-linux tailf">
1114 <primary sortas="b-tailf">tailf</primary>
1115 </indexterm>
1116 </listitem>
1117 </varlistentry>
1118
1119 <varlistentry id="taskset">
1120 <term><command>taskset</command></term>
1121 <listitem>
1122 <para>Retrieves or sets a process' CPU affinity</para>
1123 <indexterm zone="ch-system-util-linux taskset">
1124 <primary sortas="b-taskset">taskset</primary>
1125 </indexterm>
1126 </listitem>
1127 </varlistentry>
1128
1129 <varlistentry id="ul">
1130 <term><command>ul</command></term>
1131 <listitem>
1132 <para>A filter for translating underscores into escape sequences
1133 indicating underlining for the terminal in use</para>
1134 <indexterm zone="ch-system-util-linux ul">
1135 <primary sortas="b-ul">ul</primary>
1136 </indexterm>
1137 </listitem>
1138 </varlistentry>
1139
1140 <varlistentry id="umount">
1141 <term><command>umount</command></term>
1142 <listitem>
1143 <para>Disconnects a file system from the system's file tree</para>
1144 <indexterm zone="ch-system-util-linux umount">
1145 <primary sortas="b-umount">umount</primary>
1146 </indexterm>
1147 </listitem>
1148 </varlistentry>
1149
1150 <varlistentry id="uname26">
1151 <term><command>uname26</command></term>
1152 <listitem>
1153 <para>A symbolic link to setarch</para>
1154 <indexterm zone="ch-system-util-linux uname26">
1155 <primary sortas="b-uname26">uname26</primary>
1156 </indexterm>
1157 </listitem>
1158 </varlistentry>
1159
1160 <varlistentry id="unshare">
1161 <term><command>unshare</command></term>
1162 <listitem>
1163 <para>Runs a program with some namespaces unshared from parent</para>
1164 <indexterm zone="ch-system-util-linux unshare">
1165 <primary sortas="b-unshare">unshare</primary>
1166 </indexterm>
1167 </listitem>
1168 </varlistentry>
1169
1170 <varlistentry id="utmpdump">
1171 <term><command>utmpdump</command></term>
1172 <listitem>
1173 <para>Displays the content of the given login file in a more
1174 user-friendly format</para>
1175 <indexterm zone="ch-system-util-linux utmpdump">
1176 <primary sortas="b-utmpdump">utmpdump</primary>
1177 </indexterm>
1178 </listitem>
1179 </varlistentry>
1180
1181 <varlistentry id="uuidd">
1182 <term><command>uuidd</command></term>
1183 <listitem>
1184 <para>A daemon used by the UUID library to generate time-based
1185 UUIDs in a secure and guaranteed-unique fashion</para>
1186 <indexterm zone="ch-system-util-linux uuidd">
1187 <primary sortas="b-uuidd">uuidd</primary>
1188 </indexterm>
1189 </listitem>
1190 </varlistentry>
1191
1192 <varlistentry id="uuidgen">
1193 <term><command>uuidgen</command></term>
1194 <listitem>
1195 <para>Creates new UUIDs. Each new UUID can reasonably be considered
1196 unique among all UUIDs created, on the local system and on other
1197 systems, in the past and in the future</para>
1198 <indexterm zone="ch-system-util-linux uuidgen">
1199 <primary sortas="b-uuidgen">uuidgen</primary>
1200 </indexterm>
1201 </listitem>
1202 </varlistentry>
1203
1204 <varlistentry id="uuidparse">
1205 <term><command>uuidparse</command></term>
1206 <listitem>
1207 <para>An utility to parse unique identifiers</para>
1208 <indexterm zone="ch-system-util-linux uuidparse">
1209 <primary sortas="b-uuidparse">uuidparse</primary>
1210 </indexterm>
1211 </listitem>
1212 </varlistentry>
1213
1214 <varlistentry id="wall">
1215 <term><command>wall</command></term>
1216 <listitem>
1217 <para>Displays the contents of a file or, by default, its standard
1218 input, on the terminals of all currently logged in users</para>
1219 <indexterm zone="ch-system-util-linux wall">
1220 <primary sortas="b-wall">wall</primary>
1221 </indexterm>
1222 </listitem>
1223 </varlistentry>
1224
1225 <varlistentry id="wdctl">
1226 <term><command>wdctl</command></term>
1227 <listitem>
1228 <para>Shows hardware watchdog status</para>
1229 <indexterm zone="ch-system-util-linux wdctl">
1230 <primary sortas="b-wdctl">wdctl</primary>
1231 </indexterm>
1232 </listitem>
1233 </varlistentry>
1234
1235 <varlistentry id="whereis">
1236 <term><command>whereis</command></term>
1237 <listitem>
1238 <para>Reports the location of the binary, source, and man page
1239 for the given command</para>
1240 <indexterm zone="ch-system-util-linux whereis">
1241 <primary sortas="b-whereis">whereis</primary>
1242 </indexterm>
1243 </listitem>
1244 </varlistentry>
1245
1246 <varlistentry id="wipefs">
1247 <term><command>wipefs</command></term>
1248 <listitem>
1249 <para>Wipes a filesystem signature from a device</para>
1250 <indexterm zone="ch-system-util-linux wipefs">
1251 <primary sortas="b-wipefs">wipefs</primary>
1252 </indexterm>
1253 </listitem>
1254 </varlistentry>
1255
1256 <varlistentry id="x86_64">
1257 <term><command>x86_64</command></term>
1258 <listitem>
1259 <para>A symbolic link to setarch</para>
1260 <indexterm zone="ch-system-util-linux x86_64">
1261 <primary sortas="b-x86_64">x86_64</primary>
1262 </indexterm>
1263 </listitem>
1264 </varlistentry>
1265
1266 <varlistentry id="zramctl">
1267 <term><command>zramctl</command></term>
1268 <listitem>
1269 <para>A program to set up and control zram (compressed ram disk)
1270 devices</para>
1271 <indexterm zone="ch-system-util-linux zramctl">
1272 <primary sortas="b-zramctl">zramctl</primary>
1273 </indexterm>
1274 </listitem>
1275 </varlistentry>
1276
1277 <varlistentry id="libblkid">
1278 <term><filename class="libraryfile">libblkid</filename></term>
1279 <listitem>
1280 <para>Contains routines for device identification and token
1281 extraction</para>
1282 <indexterm zone="ch-system-util-linux libblkid">
1283 <primary sortas="c-libblkid">libblkid</primary>
1284 </indexterm>
1285 </listitem>
1286 </varlistentry>
1287
1288 <varlistentry id="libfdisk">
1289 <term><filename class="libraryfile">libfdisk</filename></term>
1290 <listitem>
1291 <para>Contains routines for manipulating partition tables</para>
1292 <indexterm zone="ch-system-util-linux libfdisk">
1293 <primary sortas="c-libfdisk">libfdisk</primary>
1294 </indexterm>
1295 </listitem>
1296 </varlistentry>
1297
1298 <varlistentry id="libmount">
1299 <term><filename class="libraryfile">libmount</filename></term>
1300 <listitem>
1301 <para>Contains routines for block device mounting and
1302 unmounting</para>
1303 <indexterm zone="ch-system-util-linux libmount">
1304 <primary sortas="c-libmount">libmount</primary>
1305 </indexterm>
1306 </listitem>
1307 </varlistentry>
1308
1309 <varlistentry id="libsmartcols">
1310 <term><filename class="libraryfile">libsmartcols</filename></term>
1311 <listitem>
1312 <para>Contains routines for aiding screen output in tabular form</para>
1313 <indexterm zone="ch-system-util-linux libsmartcols">
1314 <primary sortas="c-libsmartcols">libsmartcols</primary>
1315 </indexterm>
1316 </listitem>
1317 </varlistentry>
1318
1319 <varlistentry id="libuuid">
1320 <term><filename class="libraryfile">libuuid</filename></term>
1321 <listitem>
1322 <para>Contains routines for generating unique identifiers for objects
1323 that may be accessible beyond the local system</para>
1324 <indexterm zone="ch-system-util-linux libuuid">
1325 <primary sortas="c-libuuid">libuuid</primary>
1326 </indexterm>
1327 </listitem>
1328 </varlistentry>
1329
1330 </variablelist>
1331
1332 </sect2>
1333
1334</sect1>
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