source: chapter08/util-linux.xml@ e954006

11.1 11.1-rc1 11.2 11.2-rc1 11.3 11.3-rc1 12.0 12.0-rc1 12.1 12.1-rc1 arm bdubbs/gcc13 multilib renodr/libudev-from-systemd s6-init trunk xry111/arm64 xry111/arm64-12.0 xry111/clfs-ng xry111/lfs-next xry111/loongarch xry111/loongarch-12.0 xry111/loongarch-12.1 xry111/mips64el xry111/pip3 xry111/rust-wip-20221008 xry111/update-glibc
Last change on this file since e954006 was e954006, checked in by Xi Ruoyao <xry111@…>, 2 years ago

util-linux: add --bindir and --sbindir

The defaults are /bin and /sbin. We don't like them because of "DESTDIR
on merged-usr system" issue.

  • Property mode set to 100644
File size: 46.7 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-fin-sbu;</seg>
36 <seg>&util-linux-fin-du;</seg>
37 </seglistitem>
38 </segmentedlist>
39
40 </sect2>
41
42 <sect2 role="installation">
43 <title>Installation of Util-linux</title>
44
45 <para>Prepare Util-linux for compilation:</para>
46
47<screen revision="sysv"><userinput remap="configure">./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
48 --bindir=/usr/bin \
49 --libdir=/usr/lib \
50 --sbindir=/usr/sbin \
51 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
52 --disable-chfn-chsh \
53 --disable-login \
54 --disable-nologin \
55 --disable-su \
56 --disable-setpriv \
57 --disable-runuser \
58 --disable-pylibmount \
59 --disable-static \
60 --without-python \
61 --without-systemd \
62 --without-systemdsystemunitdir \
63 runstatedir=/run</userinput></screen>
64
65<screen revision="systemd"><userinput remap="configure">./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
66 --bindir=/usr/bin \
67 --libdir=/usr/lib \
68 --sbindir=/usr/sbin \
69 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
70 --disable-chfn-chsh \
71 --disable-login \
72 --disable-nologin \
73 --disable-su \
74 --disable-setpriv \
75 --disable-runuser \
76 --disable-pylibmount \
77 --disable-static \
78 --without-python \
79 runstatedir=/run</userinput></screen>
80
81 <para>The --disable and --without options prevent warnings about
82 building components that require packages not in LFS or are
83 inconsistent with programs installed by other packages.</para>
84
85 <para>Compile the package:</para>
86
87<screen><userinput remap="make">make</userinput></screen>
88
89 <para>If desired, run the test suite as a non-root user:</para>
90
91 <warning><para>Running the test suite as the
92 <systemitem class="username">root</systemitem> user can be harmful to
93 your system. To run it, the CONFIG_SCSI_DEBUG option for the kernel must
94 be available in the currently running system and must be built as a
95 module. Building it into the kernel will prevent booting. For complete
96 coverage, other BLFS packages must be installed. If desired, this test can
97 be run after rebooting into the completed LFS system and running:</para>
98
99<screen role="nodump"><userinput>bash tests/run.sh --srcdir=$PWD --builddir=$PWD</userinput></screen>
100 </warning>
101
102 <note><para>There is one test that fails in the chroot envronment and
103 causes the tests to hang forever. The problem does not occur outside
104 of the chroot envronment.
105 To work around the problem, delete the test:</para>
106
107 <screen><userinput remap="test">rm tests/ts/lsns/ioctl_ns</userinput></screen>
108 </note>
109
110<screen><userinput remap="test">chown -Rv tester .
111su tester -c "make -k check"</userinput></screen>
112
113 <para>Install the package:</para>
114
115<screen><userinput remap="install">make install</userinput></screen>
116<!--
117 <para>Finally, install the man pages:</para>
118
119<screen><userinput remap="install">tar -xf ../util-linux-man-pages-&util-linux-version;.tar.xz - -directory /usr/share/man - -strip-components=1</userinput></screen>
120-->
121 </sect2>
122
123 <sect2 id="contents-utillinux" role="content">
124 <title>Contents of Util-linux</title>
125
126 <segmentedlist>
127 <segtitle>Installed programs</segtitle>
128 <segtitle>Installed libraries</segtitle>
129 <segtitle>Installed directories</segtitle>
130
131 <seglistitem>
132 <seg>addpart, agetty, blkdiscard, blkid, blkzone, blockdev, cal, cfdisk, chcpu,
133 chmem, choom, chrt, col, colcrt, colrm, column, ctrlaltdel, delpart, dmesg,
134 eject, fallocate, fdisk, fincore, findfs, findmnt, flock, fsck,
135 fsck.cramfs, fsck.minix, fsfreeze, fstrim, getopt, hexdump, hwclock,
136 i386, ionice, ipcmk, ipcrm, ipcs, irqtop, isosize, kill, last, lastb (link to
137 last), ldattach, linux32, linux64, logger, look, losetup, lsblk, lscpu,
138 lsipc, lsirq, lslocks, lslogins, lsmem, lsns, mcookie, mesg, mkfs, mkfs.bfs, mkfs.cramfs, mkfs.minix, mkswap,
139 more, mount, mountpoint, namei, nsenter, partx, pivot_root, prlimit,
140 readprofile, rename, renice, resizepart, rev, rfkill, rtcwake, script,
141 scriptlive, scriptreplay, setarch, setsid, setterm, sfdisk, sulogin, swaplabel,
142 swapoff (link to swapon), swapon, switch_root, taskset, uclampset, ul,
143 umount, uname26, unshare, utmpdump, uuidd, uuidgen, uuidparse, wall, wdctl, whereis,
144 wipefs, x86_64, and zramctl</seg>
145 <seg>libblkid.so, libfdisk.so, libmount.so,
146 libsmartcols.so, and libuuid.so</seg>
147 <seg>/usr/include/blkid,
148 /usr/include/libfdisk,
149 /usr/include/libmount,
150 /usr/include/libsmartcols,
151 /usr/include/uuid,
152 /usr/share/doc/util-linux-&util-linux-version;,
153 and /var/lib/hwclock</seg>
154 </seglistitem>
155 </segmentedlist>
156
157 <variablelist>
158 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
159 <?dbfo list-presentation="list"?>
160 <?dbhtml list-presentation="table"?>
161
162 <varlistentry id="addpart">
163 <term><command>addpart</command></term>
164 <listitem>
165 <para>Informs the Linux kernel of new partitions</para>
166 <indexterm zone="ch-system-util-linux addpart">
167 <primary sortas="b-addpart">addpart</primary>
168 </indexterm>
169 </listitem>
170 </varlistentry>
171
172 <varlistentry id="agetty">
173 <term><command>agetty</command></term>
174 <listitem>
175 <para>Opens a tty port, prompts for a login name,
176 and then invokes the <command>login</command> program</para>
177 <indexterm zone="ch-system-util-linux agetty">
178 <primary sortas="b-agetty">agetty</primary>
179 </indexterm>
180 </listitem>
181 </varlistentry>
182
183 <varlistentry id="blkdiscard">
184 <term><command>blkdiscard</command></term>
185 <listitem>
186 <para>Discards sectors on a device</para>
187 <indexterm zone="ch-system-util-linux blkdiscard">
188 <primary sortas="b-blkdiscard">blkdiscard</primary>
189 </indexterm>
190 </listitem>
191 </varlistentry>
192
193 <varlistentry id="blkid">
194 <term><command>blkid</command></term>
195 <listitem>
196 <para>A command line utility to locate and print block device
197 attributes</para>
198 <indexterm zone="ch-system-util-linux blkid">
199 <primary sortas="b-blkid">blkid</primary>
200 </indexterm>
201 </listitem>
202 </varlistentry>
203
204 <varlistentry id="blkzone">
205 <term><command>blkzone</command></term>
206 <listitem>
207 <para>Runs zone command on the given block device</para>
208 <indexterm zone="ch-system-util-linux blkzone">
209 <primary sortas="b-blkzone">blkzone</primary>
210 </indexterm>
211 </listitem>
212 </varlistentry>
213
214 <varlistentry id="blockdev">
215 <term><command>blockdev</command></term>
216 <listitem>
217 <para>Allows users to call block device ioctls from the command
218 line</para>
219 <indexterm zone="ch-system-util-linux blockdev">
220 <primary sortas="b-blockdev">blockdev</primary>
221 </indexterm>
222 </listitem>
223 </varlistentry>
224
225 <varlistentry id="cal">
226 <term><command>cal</command></term>
227 <listitem>
228 <para>Displays a simple calendar</para>
229 <indexterm zone="ch-system-util-linux cal">
230 <primary sortas="b-cal">cal</primary>
231 </indexterm>
232 </listitem>
233 </varlistentry>
234
235 <varlistentry id="cfdisk">
236 <term><command>cfdisk</command></term>
237 <listitem>
238 <para>Manipulates the partition table of the given device</para>
239 <indexterm zone="ch-system-util-linux cfdisk">
240 <primary sortas="b-cfdisk">cfdisk</primary>
241 </indexterm>
242 </listitem>
243 </varlistentry>
244
245 <varlistentry id="chcpu">
246 <term><command>chcpu</command></term>
247 <listitem>
248 <para>Modifies the state of CPUs</para>
249 <indexterm zone="ch-system-util-linux chcpu">
250 <primary sortas="b-chcpu">chcpu</primary>
251 </indexterm>
252 </listitem>
253 </varlistentry>
254
255 <varlistentry id="chmem">
256 <term><command>chmem</command></term>
257 <listitem>
258 <para>Configures memory</para>
259 <indexterm zone="ch-system-util-linux chmem">
260 <primary sortas="b-chmem">chmem</primary>
261 </indexterm>
262 </listitem>
263 </varlistentry>
264
265 <varlistentry id="choom">
266 <term><command>choom</command></term>
267 <listitem>
268 <para>Displays and adjusts OOM-killer score</para>
269 <indexterm zone="ch-system-util-linux choom">
270 <primary sortas="b-choom">choom</primary>
271 </indexterm>
272 </listitem>
273 </varlistentry>
274
275 <varlistentry id="chrt">
276 <term><command>chrt</command></term>
277 <listitem>
278 <para>Manipulates real-time attributes of a process</para>
279 <indexterm zone="ch-system-util-linux chrt">
280 <primary sortas="b-chrt">chrt</primary>
281 </indexterm>
282 </listitem>
283 </varlistentry>
284
285 <varlistentry id="col">
286 <term><command>col</command></term>
287 <listitem>
288 <para>Filters out reverse line feeds</para>
289 <indexterm zone="ch-system-util-linux col">
290 <primary sortas="b-col">col</primary>
291 </indexterm>
292 </listitem>
293 </varlistentry>
294
295 <varlistentry id="colcrt">
296 <term><command>colcrt</command></term>
297 <listitem>
298 <para>Filters <command>nroff</command> output for terminals
299 that lack some capabilities, such as overstriking and half-lines</para>
300 <indexterm zone="ch-system-util-linux colcrt">
301 <primary sortas="b-colcrt">colcrt</primary>
302 </indexterm>
303 </listitem>
304 </varlistentry>
305
306 <varlistentry id="colrm">
307 <term><command>colrm</command></term>
308 <listitem>
309 <para>Filters out the given columns</para>
310 <indexterm zone="ch-system-util-linux colrm">
311 <primary sortas="b-colrm">colrm</primary>
312 </indexterm>
313 </listitem>
314 </varlistentry>
315
316 <varlistentry id="column">
317 <term><command>column</command></term>
318 <listitem>
319 <para>Formats a given file into multiple columns</para>
320 <indexterm zone="ch-system-util-linux column">
321 <primary sortas="b-column">column</primary>
322 </indexterm>
323 </listitem>
324 </varlistentry>
325
326 <varlistentry id="ctrlaltdel">
327 <term><command>ctrlaltdel</command></term>
328 <listitem>
329 <para>Sets the function of the Ctrl+Alt+Del key combination to a
330 hard or a soft reset</para>
331 <indexterm zone="ch-system-util-linux ctrlaltdel">
332 <primary sortas="b-ctrlaltdel">ctrlaltdel</primary>
333 </indexterm>
334 </listitem>
335 </varlistentry>
336
337 <varlistentry id="delpart">
338 <term><command>delpart</command></term>
339 <listitem>
340 <para>Asks the Linux kernel to remove a partition</para>
341 <indexterm zone="ch-system-util-linux delpart">
342 <primary sortas="b-delpart">delpart</primary>
343 </indexterm>
344 </listitem>
345 </varlistentry>
346
347 <varlistentry id="dmesg">
348 <term><command>dmesg</command></term>
349 <listitem>
350 <para>Dumps the kernel boot messages</para>
351 <indexterm zone="ch-system-util-linux dmesg">
352 <primary sortas="b-dmesg">dmesg</primary>
353 </indexterm>
354 </listitem>
355 </varlistentry>
356
357 <varlistentry id="eject">
358 <term><command>eject</command></term>
359 <listitem>
360 <para>Ejects removable media</para>
361 <indexterm zone="ch-system-util-linux eject">
362 <primary sortas="b-eject">eject</primary>
363 </indexterm>
364 </listitem>
365 </varlistentry>
366
367 <varlistentry id="fallocate">
368 <term><command>fallocate</command></term>
369 <listitem>
370 <para>Preallocates space to a file</para>
371 <indexterm zone="ch-system-util-linux fallocate">
372 <primary sortas="b-fallocate">fallocate</primary>
373 </indexterm>
374 </listitem>
375 </varlistentry>
376
377 <varlistentry id="fdisk">
378 <term><command>fdisk</command></term>
379 <listitem>
380 <para>Manipulates the partition table of the given device</para>
381 <indexterm zone="ch-system-util-linux fdisk">
382 <primary sortas="b-fdisk">fdisk</primary>
383 </indexterm>
384 </listitem>
385 </varlistentry>
386
387 <varlistentry id="fincore">
388 <term><command>fincore</command></term>
389 <listitem>
390 <para>Counts pages of file contents in core</para>
391 <indexterm zone="ch-system-util-linux fincore">
392 <primary sortas="b-fincore">fincore</primary>
393 </indexterm>
394 </listitem>
395 </varlistentry>
396
397 <varlistentry id="findfs">
398 <term><command>findfs</command></term>
399 <listitem>
400 <para>Finds a file system by label or Universally Unique Identifier
401 (UUID)</para>
402 <indexterm zone="ch-system-util-linux findfs">
403 <primary sortas="b-findfs">findfs</primary>
404 </indexterm>
405 </listitem>
406 </varlistentry>
407
408 <varlistentry id="findmnt">
409 <term><command>findmnt</command></term>
410 <listitem>
411 <para>Is a command line interface to the libmount library
412 for work with mountinfo, fstab and mtab files</para>
413 <indexterm zone="ch-system-util-linux findmnt">
414 <primary sortas="b-findmnt">findmnt</primary>
415 </indexterm>
416 </listitem>
417 </varlistentry>
418
419 <varlistentry id="flock">
420 <term><command>flock</command></term>
421 <listitem>
422 <para>Acquires a file lock and then executes a command with the lock
423 held</para>
424 <indexterm zone="ch-system-util-linux flock">
425 <primary sortas="b-flock">flock</primary>
426 </indexterm>
427 </listitem>
428 </varlistentry>
429
430 <varlistentry id="fsck">
431 <term><command>fsck</command></term>
432 <listitem>
433 <para>Is used to check, and optionally repair, file systems</para>
434 <indexterm zone="ch-system-util-linux fsck">
435 <primary sortas="b-fsck">fsck</primary>
436 </indexterm>
437 </listitem>
438 </varlistentry>
439
440 <varlistentry id="fsck.cramfs">
441 <term><command>fsck.cramfs</command></term>
442 <listitem>
443 <para>Performs a consistency check on the Cramfs file system on the
444 given device</para>
445 <indexterm zone="ch-system-util-linux fsck.cramfs">
446 <primary sortas="b-fsck.cramfs">fsck.cramfs</primary>
447 </indexterm>
448 </listitem>
449 </varlistentry>
450
451 <varlistentry id="fsck.minix">
452 <term><command>fsck.minix</command></term>
453 <listitem>
454 <para>Performs a consistency check on the Minix file system on the
455 given device</para>
456 <indexterm zone="ch-system-util-linux fsck.minix">
457 <primary sortas="b-fsck.minix">fsck.minix</primary>
458 </indexterm>
459 </listitem>
460 </varlistentry>
461
462 <varlistentry id="fsfreeze">
463 <term><command>fsfreeze</command></term>
464 <listitem>
465 <para>Is a very simple wrapper around FIFREEZE/FITHAW ioctl
466 kernel driver operations</para>
467 <indexterm zone="ch-system-util-linux fsfreeze">
468 <primary sortas="b-fsfreeze">fsfreeze</primary>
469 </indexterm>
470 </listitem>
471 </varlistentry>
472
473 <varlistentry id="fstrim">
474 <term><command>fstrim</command></term>
475 <listitem>
476 <para>Discards unused blocks on a mounted filesystem</para>
477 <indexterm zone="ch-system-util-linux fstrim">
478 <primary sortas="b-fstrim">fstrim</primary>
479 </indexterm>
480 </listitem>
481 </varlistentry>
482
483 <varlistentry id="getopt">
484 <term><command>getopt</command></term>
485 <listitem>
486 <para>Parses options in the given command line</para>
487 <indexterm zone="ch-system-util-linux getopt">
488 <primary sortas="b-getopt">getopt</primary>
489 </indexterm>
490 </listitem>
491 </varlistentry>
492
493 <varlistentry id="hexdump">
494 <term><command>hexdump</command></term>
495 <listitem>
496 <para>Dumps the given file in hexadecimal or in another given
497 format</para>
498 <indexterm zone="ch-system-util-linux hexdump">
499 <primary sortas="b-hexdump">hexdump</primary>
500 </indexterm>
501 </listitem>
502 </varlistentry>
503
504 <varlistentry id="hwclock">
505 <term><command>hwclock</command></term>
506 <listitem>
507 <para>Reads or sets the system's hardware clock, also called
508 the Real-Time Clock (RTC) or Basic Input-Output System (BIOS)
509 clock</para>
510 <indexterm zone="ch-system-util-linux hwclock">
511 <primary sortas="b-hwclock">hwclock</primary>
512 </indexterm>
513 </listitem>
514 </varlistentry>
515
516 <varlistentry id="i386">
517 <term><command>i386</command></term>
518 <listitem>
519 <para>A symbolic link to setarch</para>
520 <indexterm zone="ch-system-util-linux i386">
521 <primary sortas="b-i386">i386</primary>
522 </indexterm>
523 </listitem>
524 </varlistentry>
525
526 <varlistentry id="ionice">
527 <term><command>ionice</command></term>
528 <listitem>
529 <para>Gets or sets the io scheduling class and priority for a program</para>
530 <indexterm zone="ch-system-util-linux ionice">
531 <primary sortas="b-ionice">ionice</primary>
532 </indexterm>
533 </listitem>
534 </varlistentry>
535
536 <varlistentry id="ipcmk">
537 <term><command>ipcmk</command></term>
538 <listitem>
539 <para>Creates various IPC resources</para>
540 <indexterm zone="ch-system-util-linux ipcmk">
541 <primary sortas="b-ipcmk">ipcmk</primary>
542 </indexterm>
543 </listitem>
544 </varlistentry>
545
546 <varlistentry id="ipcrm">
547 <term><command>ipcrm</command></term>
548 <listitem>
549 <para>Removes the given Inter-Process Communication (IPC) resource</para>
550 <indexterm zone="ch-system-util-linux ipcrm">
551 <primary sortas="b-ipcrm">ipcrm</primary>
552 </indexterm>
553 </listitem>
554 </varlistentry>
555
556 <varlistentry id="ipcs">
557 <term><command>ipcs</command></term>
558 <listitem>
559 <para>Provides IPC status information</para>
560 <indexterm zone="ch-system-util-linux ipcs">
561 <primary sortas="b-ipcs">ipcs</primary>
562 </indexterm>
563 </listitem>
564 </varlistentry>
565
566 <varlistentry id="irqtop">
567 <term><command>irqtop</command></term>
568 <listitem>
569 <para>Displays kernel interrupt counter information in
570 <filename>top(1)</filename> style view</para>
571 <indexterm zone="ch-system-util-linux irqtop">
572 <primary sortas="b-irqtop">irqtop</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="lsirq">
713 <term><command>lsirq</command></term>
714 <listitem>
715 <para>Displays kernel interrupt counter information</para>
716 <indexterm zone="ch-system-util-linux lsirq">
717 <primary sortas="b-lsirq">lsirq</primary>
718 </indexterm>
719 </listitem>
720 </varlistentry>
721
722 <varlistentry id="lslocks">
723 <term><command>lslocks</command></term>
724 <listitem>
725 <para>Lists local system locks</para>
726 <indexterm zone="ch-system-util-linux lslocks">
727 <primary sortas="b-lslocks">lslocks</primary>
728 </indexterm>
729 </listitem>
730 </varlistentry>
731
732 <varlistentry id="lslogins">
733 <term><command>lslogins</command></term>
734 <listitem>
735 <para>Lists information about users, groups and system accounts</para>
736 <indexterm zone="ch-system-util-linux lslogins">
737 <primary sortas="b-lslogins">lslogins</primary>
738 </indexterm>
739 </listitem>
740 </varlistentry>
741
742 <varlistentry id="lsmem">
743 <term><command>lsmem</command></term>
744 <listitem>
745 <para>Lists the ranges of available memory with their online
746 status</para>
747 <indexterm zone="ch-system-util-linux lsmem">
748 <primary sortas="b-lsmem">lsmem</primary>
749 </indexterm>
750 </listitem>
751 </varlistentry>
752
753 <varlistentry id="lsns">
754 <term><command>lsns</command></term>
755 <listitem>
756 <para>Lists namespaces</para>
757 <indexterm zone="ch-system-util-linux lsns">
758 <primary sortas="b-lsns">lsns</primary>
759 </indexterm>
760 </listitem>
761 </varlistentry>
762
763 <varlistentry id="mcookie">
764 <term><command>mcookie</command></term>
765 <listitem>
766 <para>Generates magic cookies (128-bit random hexadecimal numbers) for
767 <command>xauth</command></para>
768 <indexterm zone="ch-system-util-linux mcookie">
769 <primary sortas="b-mcookie">mcookie</primary>
770 </indexterm>
771 </listitem>
772 </varlistentry>
773
774 <varlistentry id="mesg">
775 <term><command>mesg</command></term>
776 <listitem>
777 <para>Controls whether other users can send messages to the current
778 user's terminal</para>
779 <indexterm zone="ch-system-util-linux mesg">
780 <primary sortas="b-mesg">mesg</primary>
781 </indexterm>
782 </listitem>
783 </varlistentry>
784
785 <varlistentry id="mkfs">
786 <term><command>mkfs</command></term>
787 <listitem>
788 <para>Builds a file system on a device (usually a hard disk
789 partition)</para>
790 <indexterm zone="ch-system-util-linux mkfs">
791 <primary sortas="b-mkfs">mkfs</primary>
792 </indexterm>
793 </listitem>
794 </varlistentry>
795
796 <varlistentry id="mkfs.bfs">
797 <term><command>mkfs.bfs</command></term>
798 <listitem>
799 <para>Creates a Santa Cruz Operations (SCO) bfs file system</para>
800 <indexterm zone="ch-system-util-linux mkfs.bfs">
801 <primary sortas="b-mkfs.bfs">mkfs.bfs</primary>
802 </indexterm>
803 </listitem>
804 </varlistentry>
805
806 <varlistentry id="mkfs.cramfs">
807 <term><command>mkfs.cramfs</command></term>
808 <listitem>
809 <para>Creates a cramfs file system</para>
810 <indexterm zone="ch-system-util-linux mkfs.cramfs">
811 <primary sortas="b-mkfs.cramfs">mkfs.cramfs</primary>
812 </indexterm>
813 </listitem>
814 </varlistentry>
815
816 <varlistentry id="mkfs.minix">
817 <term><command>mkfs.minix</command></term>
818 <listitem>
819 <para>Creates a Minix file system</para>
820 <indexterm zone="ch-system-util-linux mkfs.minix">
821 <primary sortas="b-mkfs.minix">mkfs.minix</primary>
822 </indexterm>
823 </listitem>
824 </varlistentry>
825
826 <varlistentry id="mkswap">
827 <term><command>mkswap</command></term>
828 <listitem>
829 <para>Initializes the given device or file to be used as a swap
830 area</para>
831 <indexterm zone="ch-system-util-linux mkswap">
832 <primary sortas="b-mkswap">mkswap</primary>
833 </indexterm>
834 </listitem>
835 </varlistentry>
836
837 <varlistentry id="more">
838 <term><command>more</command></term>
839 <listitem>
840 <para>A filter for paging through text one screen at a time</para>
841 <indexterm zone="ch-system-util-linux more">
842 <primary sortas="b-more">more</primary>
843 </indexterm>
844 </listitem>
845 </varlistentry>
846
847 <varlistentry id="mount">
848 <term><command>mount</command></term>
849 <listitem>
850 <para>Attaches the file system on the given device to a specified
851 directory in the file-system tree</para>
852 <indexterm zone="ch-system-util-linux mount">
853 <primary sortas="b-mount">mount</primary>
854 </indexterm>
855 </listitem>
856 </varlistentry>
857
858 <varlistentry id="mountpoint">
859 <term><command>mountpoint</command></term>
860 <listitem>
861 <para>Checks if the directory is a mountpoint</para>
862 <indexterm zone="ch-system-util-linux mountpoint">
863 <primary sortas="b-mountpoint">mountpoint</primary>
864 </indexterm>
865 </listitem>
866 </varlistentry>
867
868 <varlistentry id="namei">
869 <term><command>namei</command></term>
870 <listitem>
871 <para>Shows the symbolic links in the given pathnames</para>
872 <indexterm zone="ch-system-util-linux namei">
873 <primary sortas="b-namei">namei</primary>
874 </indexterm>
875 </listitem>
876 </varlistentry>
877
878 <varlistentry id="nsenter">
879 <term><command>nsenter</command></term>
880 <listitem>
881 <para>Runs a program with namespaces of other processes</para>
882 <indexterm zone="ch-system-util-linux nsenter">
883 <primary sortas="b-nsenter">nsenter</primary>
884 </indexterm>
885 </listitem>
886 </varlistentry>
887
888 <varlistentry id="partx">
889 <term><command>partx</command></term>
890 <listitem>
891 <para>Tells the kernel about the presence and numbering of on-disk
892 partitions</para>
893 <indexterm zone="ch-system-util-linux partx">
894 <primary sortas="b-partx">partx</primary>
895 </indexterm>
896 </listitem>
897 </varlistentry>
898
899 <varlistentry id="pivot_root">
900 <term><command>pivot_root</command></term>
901 <listitem>
902 <para>Makes the given file system the new root file system of the
903 current process</para>
904 <indexterm zone="ch-system-util-linux pivot_root">
905 <primary sortas="b-pivot_root">pivot_root</primary>
906 </indexterm>
907 </listitem>
908 </varlistentry>
909
910 <varlistentry id="prlimit">
911 <term><command>prlimit</command></term>
912 <listitem>
913 <para>Get and set a process' resource limits</para>
914 <indexterm zone="ch-system-util-linux prlimit">
915 <primary sortas="b-prlimit">prlimit</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="scriptlive">
1003 <term><command>scriptlive</command></term>
1004 <listitem>
1005 <para>Re-run session typescripts using timing information</para>
1006 <indexterm zone="ch-system-util-linux scriptlive">
1007 <primary sortas="b-scriptlive">scriptlive</primary>
1008 </indexterm>
1009 </listitem>
1010 </varlistentry>
1011
1012 <varlistentry id="scriptreplay">
1013 <term><command>scriptreplay</command></term>
1014 <listitem>
1015 <para>Plays back typescripts using timing information</para>
1016 <indexterm zone="ch-system-util-linux scriptreplay">
1017 <primary sortas="b-scriptreplay">scriptreplay</primary>
1018 </indexterm>
1019 </listitem>
1020 </varlistentry>
1021
1022 <varlistentry id="setarch">
1023 <term><command>setarch</command></term>
1024 <listitem>
1025 <para>Changes reported architecture in a new program environment and
1026 sets personality flags</para>
1027 <indexterm zone="ch-system-util-linux setarch">
1028 <primary sortas="b-setarch">setarch</primary>
1029 </indexterm>
1030 </listitem>
1031 </varlistentry>
1032
1033 <varlistentry id="setsid">
1034 <term><command>setsid</command></term>
1035 <listitem>
1036 <para>Runs the given program in a new session</para>
1037 <indexterm zone="ch-system-util-linux setsid">
1038 <primary sortas="b-setsid">setsid</primary>
1039 </indexterm>
1040 </listitem>
1041 </varlistentry>
1042
1043 <varlistentry id="setterm">
1044 <term><command>setterm</command></term>
1045 <listitem>
1046 <para>Sets terminal attributes</para>
1047 <indexterm zone="ch-system-util-linux setterm">
1048 <primary sortas="b-setterm">setterm</primary>
1049 </indexterm>
1050 </listitem>
1051 </varlistentry>
1052
1053 <varlistentry id="sfdisk">
1054 <term><command>sfdisk</command></term>
1055 <listitem>
1056 <para>A disk partition table manipulator</para>
1057 <indexterm zone="ch-system-util-linux sfdisk">
1058 <primary sortas="b-sfdisk">sfdisk</primary>
1059 </indexterm>
1060 </listitem>
1061 </varlistentry>
1062
1063 <varlistentry id="sulogin">
1064 <term><command>sulogin</command></term>
1065 <listitem>
1066 <para>Allows <systemitem class="username">root</systemitem> to log in;
1067 it is normally invoked by <command>init</command> when the system goes
1068 into single user mode</para>
1069 <indexterm zone="ch-system-util-linux sulogin">
1070 <primary sortas="b-sulogin">sulogin</primary>
1071 </indexterm>
1072 </listitem>
1073 </varlistentry>
1074
1075 <varlistentry id="swaplabel">
1076 <term><command>swaplabel</command></term>
1077 <listitem>
1078 <para>Allows to change swaparea UUID and label</para>
1079 <indexterm zone="ch-system-util-linux swaplabel">
1080 <primary sortas="b-swaplabel">swaplabel</primary>
1081 </indexterm>
1082 </listitem>
1083 </varlistentry>
1084
1085 <varlistentry id="swapoff">
1086 <term><command>swapoff</command></term>
1087 <listitem>
1088 <para>Disables devices and files for paging and swapping</para>
1089 <indexterm zone="ch-system-util-linux swapoff">
1090 <primary sortas="b-swapoff">swapoff</primary>
1091 </indexterm>
1092 </listitem>
1093 </varlistentry>
1094
1095 <varlistentry id="swapon">
1096 <term><command>swapon</command></term>
1097 <listitem>
1098 <para>Enables devices and files for paging and swapping and
1099 lists the devices and files currently in use</para>
1100 <indexterm zone="ch-system-util-linux swapon">
1101 <primary sortas="b-swapon">swapon</primary>
1102 </indexterm>
1103 </listitem>
1104 </varlistentry>
1105
1106 <varlistentry id="switch_root">
1107 <term><command>switch_root</command></term>
1108 <listitem>
1109 <para>Switches to another filesystem as the root of the mount tree</para>
1110 <indexterm zone="ch-system-util-linux switch_root">
1111 <primary sortas="b-switch_root">switch_root</primary>
1112 </indexterm>
1113 </listitem>
1114 </varlistentry>
1115
1116 <varlistentry id="taskset">
1117 <term><command>taskset</command></term>
1118 <listitem>
1119 <para>Retrieves or sets a process' CPU affinity</para>
1120 <indexterm zone="ch-system-util-linux taskset">
1121 <primary sortas="b-taskset">taskset</primary>
1122 </indexterm>
1123 </listitem>
1124 </varlistentry>
1125
1126 <varlistentry id="uclampset">
1127 <term><command>uclampset</command></term>
1128 <listitem>
1129 <para>Manipulate the utilization clamping attributes of the
1130 system or a process</para>
1131 <indexterm zone="ch-system-util-linux uclampset">
1132 <primary sortas="b-uclampset">uclampset</primary>
1133 </indexterm>
1134 </listitem>
1135 </varlistentry>
1136
1137 <varlistentry id="ul">
1138 <term><command>ul</command></term>
1139 <listitem>
1140 <para>A filter for translating underscores into escape sequences
1141 indicating underlining for the terminal in use</para>
1142 <indexterm zone="ch-system-util-linux ul">
1143 <primary sortas="b-ul">ul</primary>
1144 </indexterm>
1145 </listitem>
1146 </varlistentry>
1147
1148 <varlistentry id="umount">
1149 <term><command>umount</command></term>
1150 <listitem>
1151 <para>Disconnects a file system from the system's file tree</para>
1152 <indexterm zone="ch-system-util-linux umount">
1153 <primary sortas="b-umount">umount</primary>
1154 </indexterm>
1155 </listitem>
1156 </varlistentry>
1157
1158 <varlistentry id="uname26">
1159 <term><command>uname26</command></term>
1160 <listitem>
1161 <para>A symbolic link to setarch</para>
1162 <indexterm zone="ch-system-util-linux uname26">
1163 <primary sortas="b-uname26">uname26</primary>
1164 </indexterm>
1165 </listitem>
1166 </varlistentry>
1167
1168 <varlistentry id="unshare">
1169 <term><command>unshare</command></term>
1170 <listitem>
1171 <para>Runs a program with some namespaces unshared from parent</para>
1172 <indexterm zone="ch-system-util-linux unshare">
1173 <primary sortas="b-unshare">unshare</primary>
1174 </indexterm>
1175 </listitem>
1176 </varlistentry>
1177
1178 <varlistentry id="utmpdump">
1179 <term><command>utmpdump</command></term>
1180 <listitem>
1181 <para>Displays the content of the given login file in a more
1182 user-friendly format</para>
1183 <indexterm zone="ch-system-util-linux utmpdump">
1184 <primary sortas="b-utmpdump">utmpdump</primary>
1185 </indexterm>
1186 </listitem>
1187 </varlistentry>
1188
1189 <varlistentry id="uuidd">
1190 <term><command>uuidd</command></term>
1191 <listitem>
1192 <para>A daemon used by the UUID library to generate time-based
1193 UUIDs in a secure and guaranteed-unique fashion</para>
1194 <indexterm zone="ch-system-util-linux uuidd">
1195 <primary sortas="b-uuidd">uuidd</primary>
1196 </indexterm>
1197 </listitem>
1198 </varlistentry>
1199
1200 <varlistentry id="uuidgen">
1201 <term><command>uuidgen</command></term>
1202 <listitem>
1203 <para>Creates new UUIDs. Each new UUID can reasonably be considered
1204 unique among all UUIDs created, on the local system and on other
1205 systems, in the past and in the future</para>
1206 <indexterm zone="ch-system-util-linux uuidgen">
1207 <primary sortas="b-uuidgen">uuidgen</primary>
1208 </indexterm>
1209 </listitem>
1210 </varlistentry>
1211
1212 <varlistentry id="uuidparse">
1213 <term><command>uuidparse</command></term>
1214 <listitem>
1215 <para>An utility to parse unique identifiers</para>
1216 <indexterm zone="ch-system-util-linux uuidparse">
1217 <primary sortas="b-uuidparse">uuidparse</primary>
1218 </indexterm>
1219 </listitem>
1220 </varlistentry>
1221
1222 <varlistentry id="wall">
1223 <term><command>wall</command></term>
1224 <listitem>
1225 <para>Displays the contents of a file or, by default, its standard
1226 input, on the terminals of all currently logged in users</para>
1227 <indexterm zone="ch-system-util-linux wall">
1228 <primary sortas="b-wall">wall</primary>
1229 </indexterm>
1230 </listitem>
1231 </varlistentry>
1232
1233 <varlistentry id="wdctl">
1234 <term><command>wdctl</command></term>
1235 <listitem>
1236 <para>Shows hardware watchdog status</para>
1237 <indexterm zone="ch-system-util-linux wdctl">
1238 <primary sortas="b-wdctl">wdctl</primary>
1239 </indexterm>
1240 </listitem>
1241 </varlistentry>
1242
1243 <varlistentry id="whereis">
1244 <term><command>whereis</command></term>
1245 <listitem>
1246 <para>Reports the location of the binary, source, and man page
1247 for the given command</para>
1248 <indexterm zone="ch-system-util-linux whereis">
1249 <primary sortas="b-whereis">whereis</primary>
1250 </indexterm>
1251 </listitem>
1252 </varlistentry>
1253
1254 <varlistentry id="wipefs">
1255 <term><command>wipefs</command></term>
1256 <listitem>
1257 <para>Wipes a filesystem signature from a device</para>
1258 <indexterm zone="ch-system-util-linux wipefs">
1259 <primary sortas="b-wipefs">wipefs</primary>
1260 </indexterm>
1261 </listitem>
1262 </varlistentry>
1263
1264 <varlistentry id="x86_64">
1265 <term><command>x86_64</command></term>
1266 <listitem>
1267 <para>A symbolic link to setarch</para>
1268 <indexterm zone="ch-system-util-linux x86_64">
1269 <primary sortas="b-x86_64">x86_64</primary>
1270 </indexterm>
1271 </listitem>
1272 </varlistentry>
1273
1274 <varlistentry id="zramctl">
1275 <term><command>zramctl</command></term>
1276 <listitem>
1277 <para>A program to set up and control zram (compressed ram disk)
1278 devices</para>
1279 <indexterm zone="ch-system-util-linux zramctl">
1280 <primary sortas="b-zramctl">zramctl</primary>
1281 </indexterm>
1282 </listitem>
1283 </varlistentry>
1284
1285 <varlistentry id="libblkid">
1286 <term><filename class="libraryfile">libblkid</filename></term>
1287 <listitem>
1288 <para>Contains routines for device identification and token
1289 extraction</para>
1290 <indexterm zone="ch-system-util-linux libblkid">
1291 <primary sortas="c-libblkid">libblkid</primary>
1292 </indexterm>
1293 </listitem>
1294 </varlistentry>
1295
1296 <varlistentry id="libfdisk">
1297 <term><filename class="libraryfile">libfdisk</filename></term>
1298 <listitem>
1299 <para>Contains routines for manipulating partition tables</para>
1300 <indexterm zone="ch-system-util-linux libfdisk">
1301 <primary sortas="c-libfdisk">libfdisk</primary>
1302 </indexterm>
1303 </listitem>
1304 </varlistentry>
1305
1306 <varlistentry id="libmount">
1307 <term><filename class="libraryfile">libmount</filename></term>
1308 <listitem>
1309 <para>Contains routines for block device mounting and
1310 unmounting</para>
1311 <indexterm zone="ch-system-util-linux libmount">
1312 <primary sortas="c-libmount">libmount</primary>
1313 </indexterm>
1314 </listitem>
1315 </varlistentry>
1316
1317 <varlistentry id="libsmartcols">
1318 <term><filename class="libraryfile">libsmartcols</filename></term>
1319 <listitem>
1320 <para>Contains routines for aiding screen output in tabular form</para>
1321 <indexterm zone="ch-system-util-linux libsmartcols">
1322 <primary sortas="c-libsmartcols">libsmartcols</primary>
1323 </indexterm>
1324 </listitem>
1325 </varlistentry>
1326
1327 <varlistentry id="libuuid">
1328 <term><filename class="libraryfile">libuuid</filename></term>
1329 <listitem>
1330 <para>Contains routines for generating unique identifiers for objects
1331 that may be accessible beyond the local system</para>
1332 <indexterm zone="ch-system-util-linux libuuid">
1333 <primary sortas="c-libuuid">libuuid</primary>
1334 </indexterm>
1335 </listitem>
1336 </varlistentry>
1337
1338 </variablelist>
1339
1340 </sect2>
1341
1342</sect1>
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