source: chapter08/util-linux.xml@ 79902f4

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Last change on this file since 79902f4 was 79902f4, checked in by Xi Ruoyao <xry111@…>, 11 months ago

util-linux: explain ioctl_ns failure more precisely

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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-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 --libdir=/usr/lib \
49 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
50 --disable-chfn-chsh \
51 --disable-login \
52 --disable-nologin \
53 --disable-su \
54 --disable-setpriv \
55 --disable-runuser \
56 --disable-pylibmount \
57 --disable-static \
58 --without-python \
59 --without-systemd \
60 --without-systemdsystemunitdir \
61 runstatedir=/run</userinput></screen>
62
63<screen revision="systemd"><userinput remap="configure">./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
64 --libdir=/usr/lib \
65 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
66 --disable-chfn-chsh \
67 --disable-login \
68 --disable-nologin \
69 --disable-su \
70 --disable-setpriv \
71 --disable-runuser \
72 --disable-pylibmount \
73 --disable-static \
74 --without-python \
75 runstatedir=/run</userinput></screen>
76
77 <para>The --disable and --without options prevent warnings about
78 building components that require packages not in LFS or are
79 inconsistent with programs installed by other packages.</para>
80
81 <para>Compile the package:</para>
82
83<screen><userinput remap="make">make</userinput></screen>
84
85 <para>If desired, run the test suite as a non-root user:</para>
86
87 <warning><para>Running the test suite as the
88 <systemitem class="username">root</systemitem> user can be harmful to
89 your system. To run it, the CONFIG_SCSI_DEBUG option for the kernel must
90 be available in the currently running system and must be built as a
91 module. Building it into the kernel will prevent booting. For complete
92 coverage, other BLFS packages must be installed. If desired, this test can
93 be run after rebooting into the completed LFS system and running:</para>
94
95<screen role="nodump"><userinput>bash tests/run.sh --srcdir=$PWD --builddir=$PWD</userinput></screen>
96 </warning>
97
98 <note><para>There is one test that fails if the related config options
99 are not enabled in the kernel of the host system. The failure
100 causes the tests to hang forever.
101 To work around the problem, delete the test:</para>
102
103 <screen><userinput remap="test">rm tests/ts/lsns/ioctl_ns</userinput></screen>
104 </note>
105
106<screen><userinput remap="test">chown -Rv tester .
107su tester -c "make -k check"</userinput></screen>
108
109 <para>Install the package:</para>
110
111<screen><userinput remap="install">make install</userinput></screen>
112<!--
113 <para>Finally, install the man pages:</para>
114
115<screen><userinput remap="install">tar -xf ../util-linux-man-pages-&util-linux-version;.tar.xz - -directory /usr/share/man - -strip-components=1</userinput></screen>
116-->
117 </sect2>
118
119 <sect2 id="contents-utillinux" role="content">
120 <title>Contents of Util-linux</title>
121
122 <segmentedlist>
123 <segtitle>Installed programs</segtitle>
124 <segtitle>Installed libraries</segtitle>
125 <segtitle>Installed directories</segtitle>
126
127 <seglistitem>
128 <seg>addpart, agetty, blkdiscard, blkid, blkzone, blockdev, cal, cfdisk, chcpu,
129 chmem, choom, chrt, col, colcrt, colrm, column, ctrlaltdel, delpart, dmesg,
130 eject, fallocate, fdformat, fdisk, fincore, findfs, findmnt, flock, fsck,
131 fsck.cramfs, fsck.minix, fsfreeze, fstrim, getopt, hexdump, hwclock,
132 i386, ionice, ipcmk, ipcrm, ipcs, isosize, kill, last, lastb (link to
133 last), ldattach, linux32, linux64, logger, look, losetup, lsblk, lscpu,
134 lsipc, lslocks, lslogins, lsmem, lsns, mcookie, mesg, mkfs, mkfs.bfs, mkfs.cramfs, mkfs.minix, mkswap,
135 more, mount, mountpoint, namei, nsenter, partx, pivot_root, prlimit, raw,
136 readprofile, rename, renice, resizepart, rev, rfkill, rtcwake, script,
137 scriptreplay, setarch, setsid, setterm, sfdisk, sulogin, swaplabel,
138 swapoff (link to swapon), swapon, switch_root, taskset, ul,
139 umount, uname26, unshare, utmpdump, uuidd, uuidgen, uuidparse, wall, wdctl, whereis,
140 wipefs, x86_64, and zramctl</seg>
141 <seg>libblkid.so, libfdisk.so, libmount.so,
142 libsmartcols.so, and libuuid.so</seg>
143 <seg>/usr/include/blkid,
144 /usr/include/libfdisk,
145 /usr/include/libmount,
146 /usr/include/libsmartcols,
147 /usr/include/uuid,
148 /usr/share/doc/util-linux-&util-linux-version;,
149 and /var/lib/hwclock</seg>
150 </seglistitem>
151 </segmentedlist>
152
153 <variablelist>
154 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
155 <?dbfo list-presentation="list"?>
156 <?dbhtml list-presentation="table"?>
157
158 <varlistentry id="addpart">
159 <term><command>addpart</command></term>
160 <listitem>
161 <para>Informs the Linux kernel of new partitions</para>
162 <indexterm zone="ch-system-util-linux addpart">
163 <primary sortas="b-addpart">addpart</primary>
164 </indexterm>
165 </listitem>
166 </varlistentry>
167
168 <varlistentry id="agetty">
169 <term><command>agetty</command></term>
170 <listitem>
171 <para>Opens a tty port, prompts for a login name,
172 and then invokes the <command>login</command> program</para>
173 <indexterm zone="ch-system-util-linux agetty">
174 <primary sortas="b-agetty">agetty</primary>
175 </indexterm>
176 </listitem>
177 </varlistentry>
178
179 <varlistentry id="blkdiscard">
180 <term><command>blkdiscard</command></term>
181 <listitem>
182 <para>Discards sectors on a device</para>
183 <indexterm zone="ch-system-util-linux blkdiscard">
184 <primary sortas="b-blkdiscard">blkdiscard</primary>
185 </indexterm>
186 </listitem>
187 </varlistentry>
188
189 <varlistentry id="blkid">
190 <term><command>blkid</command></term>
191 <listitem>
192 <para>A command line utility to locate and print block device
193 attributes</para>
194 <indexterm zone="ch-system-util-linux blkid">
195 <primary sortas="b-blkid">blkid</primary>
196 </indexterm>
197 </listitem>
198 </varlistentry>
199
200 <varlistentry id="blkzone">
201 <term><command>blkzone</command></term>
202 <listitem>
203 <para>Runs zone command on the given block device</para>
204 <indexterm zone="ch-system-util-linux blkzone">
205 <primary sortas="b-blkzone">blkzone</primary>
206 </indexterm>
207 </listitem>
208 </varlistentry>
209
210 <varlistentry id="blockdev">
211 <term><command>blockdev</command></term>
212 <listitem>
213 <para>Allows users to call block device ioctls from the command
214 line</para>
215 <indexterm zone="ch-system-util-linux blockdev">
216 <primary sortas="b-blockdev">blockdev</primary>
217 </indexterm>
218 </listitem>
219 </varlistentry>
220
221 <varlistentry id="cal">
222 <term><command>cal</command></term>
223 <listitem>
224 <para>Displays a simple calendar</para>
225 <indexterm zone="ch-system-util-linux cal">
226 <primary sortas="b-cal">cal</primary>
227 </indexterm>
228 </listitem>
229 </varlistentry>
230
231 <varlistentry id="cfdisk">
232 <term><command>cfdisk</command></term>
233 <listitem>
234 <para>Manipulates the partition table of the given device</para>
235 <indexterm zone="ch-system-util-linux cfdisk">
236 <primary sortas="b-cfdisk">cfdisk</primary>
237 </indexterm>
238 </listitem>
239 </varlistentry>
240
241 <varlistentry id="chcpu">
242 <term><command>chcpu</command></term>
243 <listitem>
244 <para>Modifies the state of CPUs</para>
245 <indexterm zone="ch-system-util-linux chcpu">
246 <primary sortas="b-chcpu">chcpu</primary>
247 </indexterm>
248 </listitem>
249 </varlistentry>
250
251 <varlistentry id="chmem">
252 <term><command>chmem</command></term>
253 <listitem>
254 <para>Configures memory</para>
255 <indexterm zone="ch-system-util-linux chmem">
256 <primary sortas="b-chmem">chmem</primary>
257 </indexterm>
258 </listitem>
259 </varlistentry>
260
261 <varlistentry id="choom">
262 <term><command>choom</command></term>
263 <listitem>
264 <para>Displays and adjusts OOM-killer score</para>
265 <indexterm zone="ch-system-util-linux choom">
266 <primary sortas="b-choom">choom</primary>
267 </indexterm>
268 </listitem>
269 </varlistentry>
270
271 <varlistentry id="chrt">
272 <term><command>chrt</command></term>
273 <listitem>
274 <para>Manipulates real-time attributes of a process</para>
275 <indexterm zone="ch-system-util-linux chrt">
276 <primary sortas="b-chrt">chrt</primary>
277 </indexterm>
278 </listitem>
279 </varlistentry>
280
281 <varlistentry id="col">
282 <term><command>col</command></term>
283 <listitem>
284 <para>Filters out reverse line feeds</para>
285 <indexterm zone="ch-system-util-linux col">
286 <primary sortas="b-col">col</primary>
287 </indexterm>
288 </listitem>
289 </varlistentry>
290
291 <varlistentry id="colcrt">
292 <term><command>colcrt</command></term>
293 <listitem>
294 <para>Filters <command>nroff</command> output for terminals
295 that lack some capabilities, such as overstriking and half-lines</para>
296 <indexterm zone="ch-system-util-linux colcrt">
297 <primary sortas="b-colcrt">colcrt</primary>
298 </indexterm>
299 </listitem>
300 </varlistentry>
301
302 <varlistentry id="colrm">
303 <term><command>colrm</command></term>
304 <listitem>
305 <para>Filters out the given columns</para>
306 <indexterm zone="ch-system-util-linux colrm">
307 <primary sortas="b-colrm">colrm</primary>
308 </indexterm>
309 </listitem>
310 </varlistentry>
311
312 <varlistentry id="column">
313 <term><command>column</command></term>
314 <listitem>
315 <para>Formats a given file into multiple columns</para>
316 <indexterm zone="ch-system-util-linux column">
317 <primary sortas="b-column">column</primary>
318 </indexterm>
319 </listitem>
320 </varlistentry>
321
322 <varlistentry id="ctrlaltdel">
323 <term><command>ctrlaltdel</command></term>
324 <listitem>
325 <para>Sets the function of the Ctrl+Alt+Del key combination to a
326 hard or a soft reset</para>
327 <indexterm zone="ch-system-util-linux ctrlaltdel">
328 <primary sortas="b-ctrlaltdel">ctrlaltdel</primary>
329 </indexterm>
330 </listitem>
331 </varlistentry>
332
333 <varlistentry id="delpart">
334 <term><command>delpart</command></term>
335 <listitem>
336 <para>Asks the Linux kernel to remove a partition</para>
337 <indexterm zone="ch-system-util-linux delpart">
338 <primary sortas="b-delpart">delpart</primary>
339 </indexterm>
340 </listitem>
341 </varlistentry>
342
343 <varlistentry id="dmesg">
344 <term><command>dmesg</command></term>
345 <listitem>
346 <para>Dumps the kernel boot messages</para>
347 <indexterm zone="ch-system-util-linux dmesg">
348 <primary sortas="b-dmesg">dmesg</primary>
349 </indexterm>
350 </listitem>
351 </varlistentry>
352
353 <varlistentry id="eject">
354 <term><command>eject</command></term>
355 <listitem>
356 <para>Ejects removable media</para>
357 <indexterm zone="ch-system-util-linux eject">
358 <primary sortas="b-eject">eject</primary>
359 </indexterm>
360 </listitem>
361 </varlistentry>
362
363 <varlistentry id="fallocate">
364 <term><command>fallocate</command></term>
365 <listitem>
366 <para>Preallocates space to a file</para>
367 <indexterm zone="ch-system-util-linux fallocate">
368 <primary sortas="b-fallocate">fallocate</primary>
369 </indexterm>
370 </listitem>
371 </varlistentry>
372
373 <varlistentry id="fdformat">
374 <term><command>fdformat</command></term>
375 <listitem>
376 <para>Low-level formats a floppy disk</para>
377 <indexterm zone="ch-system-util-linux fdformat">
378 <primary sortas="b-fdformat">fdformat</primary>
379 </indexterm>
380 </listitem>
381 </varlistentry>
382
383 <varlistentry id="fdisk">
384 <term><command>fdisk</command></term>
385 <listitem>
386 <para>Manipulates the partition table of the given device</para>
387 <indexterm zone="ch-system-util-linux fdisk">
388 <primary sortas="b-fdisk">fdisk</primary>
389 </indexterm>
390 </listitem>
391 </varlistentry>
392
393 <varlistentry id="fincore">
394 <term><command>fincore</command></term>
395 <listitem>
396 <para>Counts pages of file contents in core</para>
397 <indexterm zone="ch-system-util-linux fincore">
398 <primary sortas="b-fincore">fincore</primary>
399 </indexterm>
400 </listitem>
401 </varlistentry>
402
403 <varlistentry id="findfs">
404 <term><command>findfs</command></term>
405 <listitem>
406 <para>Finds a file system by label or Universally Unique Identifier
407 (UUID)</para>
408 <indexterm zone="ch-system-util-linux findfs">
409 <primary sortas="b-findfs">findfs</primary>
410 </indexterm>
411 </listitem>
412 </varlistentry>
413
414 <varlistentry id="findmnt">
415 <term><command>findmnt</command></term>
416 <listitem>
417 <para>Is a command line interface to the libmount library
418 for work with mountinfo, fstab and mtab files</para>
419 <indexterm zone="ch-system-util-linux findmnt">
420 <primary sortas="b-findmnt">findmnt</primary>
421 </indexterm>
422 </listitem>
423 </varlistentry>
424
425 <varlistentry id="flock">
426 <term><command>flock</command></term>
427 <listitem>
428 <para>Acquires a file lock and then executes a command with the lock
429 held</para>
430 <indexterm zone="ch-system-util-linux flock">
431 <primary sortas="b-flock">flock</primary>
432 </indexterm>
433 </listitem>
434 </varlistentry>
435
436 <varlistentry id="fsck">
437 <term><command>fsck</command></term>
438 <listitem>
439 <para>Is used to check, and optionally repair, file systems</para>
440 <indexterm zone="ch-system-util-linux fsck">
441 <primary sortas="b-fsck">fsck</primary>
442 </indexterm>
443 </listitem>
444 </varlistentry>
445
446 <varlistentry id="fsck.cramfs">
447 <term><command>fsck.cramfs</command></term>
448 <listitem>
449 <para>Performs a consistency check on the Cramfs file system on the
450 given device</para>
451 <indexterm zone="ch-system-util-linux fsck.cramfs">
452 <primary sortas="b-fsck.cramfs">fsck.cramfs</primary>
453 </indexterm>
454 </listitem>
455 </varlistentry>
456
457 <varlistentry id="fsck.minix">
458 <term><command>fsck.minix</command></term>
459 <listitem>
460 <para>Performs a consistency check on the Minix file system on the
461 given device</para>
462 <indexterm zone="ch-system-util-linux fsck.minix">
463 <primary sortas="b-fsck.minix">fsck.minix</primary>
464 </indexterm>
465 </listitem>
466 </varlistentry>
467
468 <varlistentry id="fsfreeze">
469 <term><command>fsfreeze</command></term>
470 <listitem>
471 <para>Is a very simple wrapper around FIFREEZE/FITHAW ioctl
472 kernel driver operations</para>
473 <indexterm zone="ch-system-util-linux fsfreeze">
474 <primary sortas="b-fsfreeze">fsfreeze</primary>
475 </indexterm>
476 </listitem>
477 </varlistentry>
478
479 <varlistentry id="fstrim">
480 <term><command>fstrim</command></term>
481 <listitem>
482 <para>Discards unused blocks on a mounted filesystem</para>
483 <indexterm zone="ch-system-util-linux fstrim">
484 <primary sortas="b-fstrim">fstrim</primary>
485 </indexterm>
486 </listitem>
487 </varlistentry>
488
489 <varlistentry id="getopt">
490 <term><command>getopt</command></term>
491 <listitem>
492 <para>Parses options in the given command line</para>
493 <indexterm zone="ch-system-util-linux getopt">
494 <primary sortas="b-getopt">getopt</primary>
495 </indexterm>
496 </listitem>
497 </varlistentry>
498
499 <varlistentry id="hexdump">
500 <term><command>hexdump</command></term>
501 <listitem>
502 <para>Dumps the given file in hexadecimal or in another given
503 format</para>
504 <indexterm zone="ch-system-util-linux hexdump">
505 <primary sortas="b-hexdump">hexdump</primary>
506 </indexterm>
507 </listitem>
508 </varlistentry>
509
510 <varlistentry id="hwclock">
511 <term><command>hwclock</command></term>
512 <listitem>
513 <para>Reads or sets the system's hardware clock, also called
514 the Real-Time Clock (RTC) or Basic Input-Output System (BIOS)
515 clock</para>
516 <indexterm zone="ch-system-util-linux hwclock">
517 <primary sortas="b-hwclock">hwclock</primary>
518 </indexterm>
519 </listitem>
520 </varlistentry>
521
522 <varlistentry id="i386">
523 <term><command>i386</command></term>
524 <listitem>
525 <para>A symbolic link to setarch</para>
526 <indexterm zone="ch-system-util-linux i386">
527 <primary sortas="b-i386">i386</primary>
528 </indexterm>
529 </listitem>
530 </varlistentry>
531
532 <varlistentry id="ionice">
533 <term><command>ionice</command></term>
534 <listitem>
535 <para>Gets or sets the io scheduling class and priority for a program</para>
536 <indexterm zone="ch-system-util-linux ionice">
537 <primary sortas="b-ionice">ionice</primary>
538 </indexterm>
539 </listitem>
540 </varlistentry>
541
542 <varlistentry id="ipcmk">
543 <term><command>ipcmk</command></term>
544 <listitem>
545 <para>Creates various IPC resources</para>
546 <indexterm zone="ch-system-util-linux ipcmk">
547 <primary sortas="b-ipcmk">ipcmk</primary>
548 </indexterm>
549 </listitem>
550 </varlistentry>
551
552 <varlistentry id="ipcrm">
553 <term><command>ipcrm</command></term>
554 <listitem>
555 <para>Removes the given Inter-Process Communication (IPC) resource</para>
556 <indexterm zone="ch-system-util-linux ipcrm">
557 <primary sortas="b-ipcrm">ipcrm</primary>
558 </indexterm>
559 </listitem>
560 </varlistentry>
561
562 <varlistentry id="ipcs">
563 <term><command>ipcs</command></term>
564 <listitem>
565 <para>Provides IPC status information</para>
566 <indexterm zone="ch-system-util-linux ipcs">
567 <primary sortas="b-ipcs">ipcs</primary>
568 </indexterm>
569 </listitem>
570 </varlistentry>
571
572 <varlistentry id="isosize">
573 <term><command>isosize</command></term>
574 <listitem>
575 <para>Reports the size of an iso9660 file system</para>
576 <indexterm zone="ch-system-util-linux isosize">
577 <primary sortas="b-isosize">isosize</primary>
578 </indexterm>
579 </listitem>
580 </varlistentry>
581
582 <varlistentry id="kill">
583 <term><command>kill</command></term>
584 <listitem>
585 <para>Sends signals to processes</para>
586 <indexterm zone="ch-system-util-linux kill">
587 <primary sortas="b-kill">kill</primary>
588 </indexterm>
589 </listitem>
590 </varlistentry>
591
592 <varlistentry id="last">
593 <term><command>last</command></term>
594 <listitem>
595 <para>Shows which users last logged in (and out), searching back
596 through the <filename>/var/log/wtmp</filename> file; it also shows
597 system boots, shutdowns, and run-level changes</para>
598 <indexterm zone="ch-system-util-linux last">
599 <primary sortas="b-last">last</primary>
600 </indexterm>
601 </listitem>
602 </varlistentry>
603
604 <varlistentry id="lastb">
605 <term><command>lastb</command></term>
606 <listitem>
607 <para>Shows the failed login attempts, as logged in
608 <filename>/var/log/btmp</filename></para>
609 <indexterm zone="ch-system-util-linux lastb">
610 <primary sortas="b-lastb">lastb</primary>
611 </indexterm>
612 </listitem>
613 </varlistentry>
614
615 <varlistentry id="ldattach">
616 <term><command>ldattach</command></term>
617 <listitem>
618 <para>Attaches a line discipline to a serial line</para>
619 <indexterm zone="ch-system-util-linux ldattach">
620 <primary sortas="b-ldattach">ldattach</primary>
621 </indexterm>
622 </listitem>
623 </varlistentry>
624
625 <varlistentry id="linux32">
626 <term><command>linux32</command></term>
627 <listitem>
628 <para>A symbolic link to setarch</para>
629 <indexterm zone="ch-system-util-linux linux32">
630 <primary sortas="b-linux32">linux32</primary>
631 </indexterm>
632 </listitem>
633 </varlistentry>
634
635 <varlistentry id="linux64">
636 <term><command>linux64</command></term>
637 <listitem>
638 <para>A symbolic link to setarch</para>
639 <indexterm zone="ch-system-util-linux linux64">
640 <primary sortas="b-linux64">linux64</primary>
641 </indexterm>
642 </listitem>
643 </varlistentry>
644
645 <varlistentry id="logger">
646 <term><command>logger</command></term>
647 <listitem>
648 <para>Enters the given message into the system log</para>
649 <indexterm zone="ch-system-util-linux logger">
650 <primary sortas="b-logger">logger</primary>
651 </indexterm>
652 </listitem>
653 </varlistentry>
654
655 <varlistentry id="look">
656 <term><command>look</command></term>
657 <listitem>
658 <para>Displays lines that begin with the given string</para>
659 <indexterm zone="ch-system-util-linux look">
660 <primary sortas="b-look">look</primary>
661 </indexterm>
662 </listitem>
663 </varlistentry>
664
665 <varlistentry id="losetup">
666 <term><command>losetup</command></term>
667 <listitem>
668 <para>Sets up and controls loop devices</para>
669 <indexterm zone="ch-system-util-linux losetup">
670 <primary sortas="b-losetup">losetup</primary>
671 </indexterm>
672 </listitem>
673 </varlistentry>
674
675 <varlistentry id="lsblk">
676 <term><command>lsblk</command></term>
677 <listitem>
678 <para>Lists information about all or selected block devices in
679 a tree-like format</para>
680 <indexterm zone="ch-system-util-linux lsblk">
681 <primary sortas="b-lsblk">lsblk</primary>
682 </indexterm>
683 </listitem>
684 </varlistentry>
685
686 <varlistentry id="lscpu">
687 <term><command>lscpu</command></term>
688 <listitem>
689 <para>Prints CPU architecture information</para>
690 <indexterm zone="ch-system-util-linux lscpu">
691 <primary sortas="b-lscpu">lscpu</primary>
692 </indexterm>
693 </listitem>
694 </varlistentry>
695
696 <varlistentry id="lsipc">
697 <term><command>lsipc</command></term>
698 <listitem>
699 <para>Prints information on IPC facilities currently employed
700 in the system</para>
701 <indexterm zone="ch-system-util-linux lsipc">
702 <primary sortas="b-lsipc">lsipc</primary>
703 </indexterm>
704 </listitem>
705 </varlistentry>
706
707 <varlistentry id="lslocks">
708 <term><command>lslocks</command></term>
709 <listitem>
710 <para>Lists local system locks</para>
711 <indexterm zone="ch-system-util-linux lslocks">
712 <primary sortas="b-lslocks">lslocks</primary>
713 </indexterm>
714 </listitem>
715 </varlistentry>
716
717 <varlistentry id="lslogins">
718 <term><command>lslogins</command></term>
719 <listitem>
720 <para>Lists information about users, groups and system accounts</para>
721 <indexterm zone="ch-system-util-linux lslogins">
722 <primary sortas="b-lslogins">lslogins</primary>
723 </indexterm>
724 </listitem>
725 </varlistentry>
726
727 <varlistentry id="lsmem">
728 <term><command>lsmem</command></term>
729 <listitem>
730 <para>Lists the ranges of available memory with their online
731 status</para>
732 <indexterm zone="ch-system-util-linux lsmem">
733 <primary sortas="b-lsmem">lsmem</primary>
734 </indexterm>
735 </listitem>
736 </varlistentry>
737
738 <varlistentry id="lsns">
739 <term><command>lsns</command></term>
740 <listitem>
741 <para>Lists namespaces</para>
742 <indexterm zone="ch-system-util-linux lsns">
743 <primary sortas="b-lsns">lsns</primary>
744 </indexterm>
745 </listitem>
746 </varlistentry>
747
748 <varlistentry id="mcookie">
749 <term><command>mcookie</command></term>
750 <listitem>
751 <para>Generates magic cookies (128-bit random hexadecimal numbers) for
752 <command>xauth</command></para>
753 <indexterm zone="ch-system-util-linux mcookie">
754 <primary sortas="b-mcookie">mcookie</primary>
755 </indexterm>
756 </listitem>
757 </varlistentry>
758
759 <varlistentry id="mesg">
760 <term><command>mesg</command></term>
761 <listitem>
762 <para>Controls whether other users can send messages to the current
763 user's terminal</para>
764 <indexterm zone="ch-system-util-linux mesg">
765 <primary sortas="b-mesg">mesg</primary>
766 </indexterm>
767 </listitem>
768 </varlistentry>
769
770 <varlistentry id="mkfs">
771 <term><command>mkfs</command></term>
772 <listitem>
773 <para>Builds a file system on a device (usually a hard disk
774 partition)</para>
775 <indexterm zone="ch-system-util-linux mkfs">
776 <primary sortas="b-mkfs">mkfs</primary>
777 </indexterm>
778 </listitem>
779 </varlistentry>
780
781 <varlistentry id="mkfs.bfs">
782 <term><command>mkfs.bfs</command></term>
783 <listitem>
784 <para>Creates a Santa Cruz Operations (SCO) bfs file system</para>
785 <indexterm zone="ch-system-util-linux mkfs.bfs">
786 <primary sortas="b-mkfs.bfs">mkfs.bfs</primary>
787 </indexterm>
788 </listitem>
789 </varlistentry>
790
791 <varlistentry id="mkfs.cramfs">
792 <term><command>mkfs.cramfs</command></term>
793 <listitem>
794 <para>Creates a cramfs file system</para>
795 <indexterm zone="ch-system-util-linux mkfs.cramfs">
796 <primary sortas="b-mkfs.cramfs">mkfs.cramfs</primary>
797 </indexterm>
798 </listitem>
799 </varlistentry>
800
801 <varlistentry id="mkfs.minix">
802 <term><command>mkfs.minix</command></term>
803 <listitem>
804 <para>Creates a Minix file system</para>
805 <indexterm zone="ch-system-util-linux mkfs.minix">
806 <primary sortas="b-mkfs.minix">mkfs.minix</primary>
807 </indexterm>
808 </listitem>
809 </varlistentry>
810
811 <varlistentry id="mkswap">
812 <term><command>mkswap</command></term>
813 <listitem>
814 <para>Initializes the given device or file to be used as a swap
815 area</para>
816 <indexterm zone="ch-system-util-linux mkswap">
817 <primary sortas="b-mkswap">mkswap</primary>
818 </indexterm>
819 </listitem>
820 </varlistentry>
821
822 <varlistentry id="more">
823 <term><command>more</command></term>
824 <listitem>
825 <para>A filter for paging through text one screen at a time</para>
826 <indexterm zone="ch-system-util-linux more">
827 <primary sortas="b-more">more</primary>
828 </indexterm>
829 </listitem>
830 </varlistentry>
831
832 <varlistentry id="mount">
833 <term><command>mount</command></term>
834 <listitem>
835 <para>Attaches the file system on the given device to a specified
836 directory in the file-system tree</para>
837 <indexterm zone="ch-system-util-linux mount">
838 <primary sortas="b-mount">mount</primary>
839 </indexterm>
840 </listitem>
841 </varlistentry>
842
843 <varlistentry id="mountpoint">
844 <term><command>mountpoint</command></term>
845 <listitem>
846 <para>Checks if the directory is a mountpoint</para>
847 <indexterm zone="ch-system-util-linux mountpoint">
848 <primary sortas="b-mountpoint">mountpoint</primary>
849 </indexterm>
850 </listitem>
851 </varlistentry>
852
853 <varlistentry id="namei">
854 <term><command>namei</command></term>
855 <listitem>
856 <para>Shows the symbolic links in the given pathnames</para>
857 <indexterm zone="ch-system-util-linux namei">
858 <primary sortas="b-namei">namei</primary>
859 </indexterm>
860 </listitem>
861 </varlistentry>
862
863 <varlistentry id="nsenter">
864 <term><command>nsenter</command></term>
865 <listitem>
866 <para>Runs a program with namespaces of other processes</para>
867 <indexterm zone="ch-system-util-linux nsenter">
868 <primary sortas="b-nsenter">nsenter</primary>
869 </indexterm>
870 </listitem>
871 </varlistentry>
872
873 <varlistentry id="partx">
874 <term><command>partx</command></term>
875 <listitem>
876 <para>Tells the kernel about the presence and numbering of on-disk
877 partitions</para>
878 <indexterm zone="ch-system-util-linux partx">
879 <primary sortas="b-partx">partx</primary>
880 </indexterm>
881 </listitem>
882 </varlistentry>
883
884 <varlistentry id="pivot_root">
885 <term><command>pivot_root</command></term>
886 <listitem>
887 <para>Makes the given file system the new root file system of the
888 current process</para>
889 <indexterm zone="ch-system-util-linux pivot_root">
890 <primary sortas="b-pivot_root">pivot_root</primary>
891 </indexterm>
892 </listitem>
893 </varlistentry>
894
895 <varlistentry id="prlimit">
896 <term><command>prlimit</command></term>
897 <listitem>
898 <para>Get and set a process' resource limits</para>
899 <indexterm zone="ch-system-util-linux prlimit">
900 <primary sortas="b-prlimit">prlimit</primary>
901 </indexterm>
902 </listitem>
903 </varlistentry>
904
905 <varlistentry id="raw">
906 <term><command>raw</command></term>
907 <listitem>
908 <para>Bind a Linux raw character device to a block device</para>
909 <indexterm zone="ch-system-util-linux raw">
910 <primary sortas="b-raw">raw</primary>
911 </indexterm>
912 </listitem>
913 </varlistentry>
914
915 <varlistentry id="readprofile">
916 <term><command>readprofile</command></term>
917 <listitem>
918 <para>Reads kernel profiling information</para>
919 <indexterm zone="ch-system-util-linux readprofile">
920 <primary sortas="b-readprofile">readprofile</primary>
921 </indexterm>
922 </listitem>
923 </varlistentry>
924
925 <varlistentry id="rename">
926 <term><command>rename</command></term>
927 <listitem>
928 <para>Renames the given files, replacing a given string with
929 another</para>
930 <indexterm zone="ch-system-util-linux rename">
931 <primary sortas="b-rename">rename</primary>
932 </indexterm>
933 </listitem>
934 </varlistentry>
935
936 <varlistentry id="renice">
937 <term><command>renice</command></term>
938 <listitem>
939 <para>Alters the priority of running processes</para>
940 <indexterm zone="ch-system-util-linux renice">
941 <primary sortas="b-renice">renice</primary>
942 </indexterm>
943 </listitem>
944 </varlistentry>
945
946 <varlistentry id="resizepart">
947 <term><command>resizepart</command></term>
948 <listitem>
949 <para>Asks the Linux kernel to resize a partition</para>
950 <indexterm zone="ch-system-util-linux resizepart">
951 <primary sortas="b-resizepart">resizepart</primary>
952 </indexterm>
953 </listitem>
954 </varlistentry>
955
956 <varlistentry id="rev">
957 <term><command>rev</command></term>
958 <listitem>
959 <para>Reverses the lines of a given file</para>
960 <indexterm zone="ch-system-util-linux rev">
961 <primary sortas="b-rev">rev</primary>
962 </indexterm>
963 </listitem>
964 </varlistentry>
965
966 <varlistentry id="rkfill">
967 <term><command>rkfill</command></term>
968 <listitem>
969 <para>Tool for enabling and disabling wireless devices</para>
970 <indexterm zone="ch-system-util-linux rkfill">
971 <primary sortas="b-rkfill">rkfill</primary>
972 </indexterm>
973 </listitem>
974 </varlistentry>
975
976 <varlistentry id="rtcwake">
977 <term><command>rtcwake</command></term>
978 <listitem>
979 <para>Used to enter a system sleep state until specified wakeup
980 time</para>
981 <indexterm zone="ch-system-util-linux rtcwake">
982 <primary sortas="b-rtcwake">rtcwake</primary>
983 </indexterm>
984 </listitem>
985 </varlistentry>
986
987 <varlistentry id="script">
988 <term><command>script</command></term>
989 <listitem>
990 <para>Makes a typescript of a terminal session</para>
991 <indexterm zone="ch-system-util-linux script">
992 <primary sortas="b-script">script</primary>
993 </indexterm>
994 </listitem>
995 </varlistentry>
996
997 <varlistentry id="scriptreplay">
998 <term><command>scriptreplay</command></term>
999 <listitem>
1000 <para>Plays back typescripts using timing information</para>
1001 <indexterm zone="ch-system-util-linux scriptreplay">
1002 <primary sortas="b-scriptreplay">scriptreplay</primary>
1003 </indexterm>
1004 </listitem>
1005 </varlistentry>
1006
1007 <varlistentry id="setarch">
1008 <term><command>setarch</command></term>
1009 <listitem>
1010 <para>Changes reported architecture in a new program environment and
1011 sets personality flags</para>
1012 <indexterm zone="ch-system-util-linux setarch">
1013 <primary sortas="b-setarch">setarch</primary>
1014 </indexterm>
1015 </listitem>
1016 </varlistentry>
1017
1018 <varlistentry id="setsid">
1019 <term><command>setsid</command></term>
1020 <listitem>
1021 <para>Runs the given program in a new session</para>
1022 <indexterm zone="ch-system-util-linux setsid">
1023 <primary sortas="b-setsid">setsid</primary>
1024 </indexterm>
1025 </listitem>
1026 </varlistentry>
1027
1028 <varlistentry id="setterm">
1029 <term><command>setterm</command></term>
1030 <listitem>
1031 <para>Sets terminal attributes</para>
1032 <indexterm zone="ch-system-util-linux setterm">
1033 <primary sortas="b-setterm">setterm</primary>
1034 </indexterm>
1035 </listitem>
1036 </varlistentry>
1037
1038 <varlistentry id="sfdisk">
1039 <term><command>sfdisk</command></term>
1040 <listitem>
1041 <para>A disk partition table manipulator</para>
1042 <indexterm zone="ch-system-util-linux sfdisk">
1043 <primary sortas="b-sfdisk">sfdisk</primary>
1044 </indexterm>
1045 </listitem>
1046 </varlistentry>
1047
1048 <varlistentry id="sulogin">
1049 <term><command>sulogin</command></term>
1050 <listitem>
1051 <para>Allows <systemitem class="username">root</systemitem> to log in;
1052 it is normally invoked by <command>init</command> when the system goes
1053 into single user mode</para>
1054 <indexterm zone="ch-system-util-linux sulogin">
1055 <primary sortas="b-sulogin">sulogin</primary>
1056 </indexterm>
1057 </listitem>
1058 </varlistentry>
1059
1060 <varlistentry id="swaplabel">
1061 <term><command>swaplabel</command></term>
1062 <listitem>
1063 <para>Allows to change swaparea UUID and label</para>
1064 <indexterm zone="ch-system-util-linux swaplabel">
1065 <primary sortas="b-swaplabel">swaplabel</primary>
1066 </indexterm>
1067 </listitem>
1068 </varlistentry>
1069
1070 <varlistentry id="swapoff">
1071 <term><command>swapoff</command></term>
1072 <listitem>
1073 <para>Disables devices and files for paging and swapping</para>
1074 <indexterm zone="ch-system-util-linux swapoff">
1075 <primary sortas="b-swapoff">swapoff</primary>
1076 </indexterm>
1077 </listitem>
1078 </varlistentry>
1079
1080 <varlistentry id="swapon">
1081 <term><command>swapon</command></term>
1082 <listitem>
1083 <para>Enables devices and files for paging and swapping and
1084 lists the devices and files currently in use</para>
1085 <indexterm zone="ch-system-util-linux swapon">
1086 <primary sortas="b-swapon">swapon</primary>
1087 </indexterm>
1088 </listitem>
1089 </varlistentry>
1090
1091 <varlistentry id="switch_root">
1092 <term><command>switch_root</command></term>
1093 <listitem>
1094 <para>Switches to another filesystem as the root of the mount tree</para>
1095 <indexterm zone="ch-system-util-linux switch_root">
1096 <primary sortas="b-switch_root">switch_root</primary>
1097 </indexterm>
1098 </listitem>
1099 </varlistentry>
1100
1101 <varlistentry id="tailf">
1102 <term><command>tailf</command></term>
1103 <listitem>
1104 <para>Tracks the growth of a log file; displays the last 10 lines
1105 of a log file, then continues displaying any new entries in the
1106 log file as they are created</para>
1107 <indexterm zone="ch-system-util-linux tailf">
1108 <primary sortas="b-tailf">tailf</primary>
1109 </indexterm>
1110 </listitem>
1111 </varlistentry>
1112
1113 <varlistentry id="taskset">
1114 <term><command>taskset</command></term>
1115 <listitem>
1116 <para>Retrieves or sets a process' CPU affinity</para>
1117 <indexterm zone="ch-system-util-linux taskset">
1118 <primary sortas="b-taskset">taskset</primary>
1119 </indexterm>
1120 </listitem>
1121 </varlistentry>
1122
1123 <varlistentry id="ul">
1124 <term><command>ul</command></term>
1125 <listitem>
1126 <para>A filter for translating underscores into escape sequences
1127 indicating underlining for the terminal in use</para>
1128 <indexterm zone="ch-system-util-linux ul">
1129 <primary sortas="b-ul">ul</primary>
1130 </indexterm>
1131 </listitem>
1132 </varlistentry>
1133
1134 <varlistentry id="umount">
1135 <term><command>umount</command></term>
1136 <listitem>
1137 <para>Disconnects a file system from the system's file tree</para>
1138 <indexterm zone="ch-system-util-linux umount">
1139 <primary sortas="b-umount">umount</primary>
1140 </indexterm>
1141 </listitem>
1142 </varlistentry>
1143
1144 <varlistentry id="uname26">
1145 <term><command>uname26</command></term>
1146 <listitem>
1147 <para>A symbolic link to setarch</para>
1148 <indexterm zone="ch-system-util-linux uname26">
1149 <primary sortas="b-uname26">uname26</primary>
1150 </indexterm>
1151 </listitem>
1152 </varlistentry>
1153
1154 <varlistentry id="unshare">
1155 <term><command>unshare</command></term>
1156 <listitem>
1157 <para>Runs a program with some namespaces unshared from parent</para>
1158 <indexterm zone="ch-system-util-linux unshare">
1159 <primary sortas="b-unshare">unshare</primary>
1160 </indexterm>
1161 </listitem>
1162 </varlistentry>
1163
1164 <varlistentry id="utmpdump">
1165 <term><command>utmpdump</command></term>
1166 <listitem>
1167 <para>Displays the content of the given login file in a more
1168 user-friendly format</para>
1169 <indexterm zone="ch-system-util-linux utmpdump">
1170 <primary sortas="b-utmpdump">utmpdump</primary>
1171 </indexterm>
1172 </listitem>
1173 </varlistentry>
1174
1175 <varlistentry id="uuidd">
1176 <term><command>uuidd</command></term>
1177 <listitem>
1178 <para>A daemon used by the UUID library to generate time-based
1179 UUIDs in a secure and guaranteed-unique fashion</para>
1180 <indexterm zone="ch-system-util-linux uuidd">
1181 <primary sortas="b-uuidd">uuidd</primary>
1182 </indexterm>
1183 </listitem>
1184 </varlistentry>
1185
1186 <varlistentry id="uuidgen">
1187 <term><command>uuidgen</command></term>
1188 <listitem>
1189 <para>Creates new UUIDs. Each new UUID can reasonably be considered
1190 unique among all UUIDs created, on the local system and on other
1191 systems, in the past and in the future</para>
1192 <indexterm zone="ch-system-util-linux uuidgen">
1193 <primary sortas="b-uuidgen">uuidgen</primary>
1194 </indexterm>
1195 </listitem>
1196 </varlistentry>
1197
1198 <varlistentry id="uuidparse">
1199 <term><command>uuidparse</command></term>
1200 <listitem>
1201 <para>An utility to parse unique identifiers</para>
1202 <indexterm zone="ch-system-util-linux uuidparse">
1203 <primary sortas="b-uuidparse">uuidparse</primary>
1204 </indexterm>
1205 </listitem>
1206 </varlistentry>
1207
1208 <varlistentry id="wall">
1209 <term><command>wall</command></term>
1210 <listitem>
1211 <para>Displays the contents of a file or, by default, its standard
1212 input, on the terminals of all currently logged in users</para>
1213 <indexterm zone="ch-system-util-linux wall">
1214 <primary sortas="b-wall">wall</primary>
1215 </indexterm>
1216 </listitem>
1217 </varlistentry>
1218
1219 <varlistentry id="wdctl">
1220 <term><command>wdctl</command></term>
1221 <listitem>
1222 <para>Shows hardware watchdog status</para>
1223 <indexterm zone="ch-system-util-linux wdctl">
1224 <primary sortas="b-wdctl">wdctl</primary>
1225 </indexterm>
1226 </listitem>
1227 </varlistentry>
1228
1229 <varlistentry id="whereis">
1230 <term><command>whereis</command></term>
1231 <listitem>
1232 <para>Reports the location of the binary, source, and man page
1233 for the given command</para>
1234 <indexterm zone="ch-system-util-linux whereis">
1235 <primary sortas="b-whereis">whereis</primary>
1236 </indexterm>
1237 </listitem>
1238 </varlistentry>
1239
1240 <varlistentry id="wipefs">
1241 <term><command>wipefs</command></term>
1242 <listitem>
1243 <para>Wipes a filesystem signature from a device</para>
1244 <indexterm zone="ch-system-util-linux wipefs">
1245 <primary sortas="b-wipefs">wipefs</primary>
1246 </indexterm>
1247 </listitem>
1248 </varlistentry>
1249
1250 <varlistentry id="x86_64">
1251 <term><command>x86_64</command></term>
1252 <listitem>
1253 <para>A symbolic link to setarch</para>
1254 <indexterm zone="ch-system-util-linux x86_64">
1255 <primary sortas="b-x86_64">x86_64</primary>
1256 </indexterm>
1257 </listitem>
1258 </varlistentry>
1259
1260 <varlistentry id="zramctl">
1261 <term><command>zramctl</command></term>
1262 <listitem>
1263 <para>A program to set up and control zram (compressed ram disk)
1264 devices</para>
1265 <indexterm zone="ch-system-util-linux zramctl">
1266 <primary sortas="b-zramctl">zramctl</primary>
1267 </indexterm>
1268 </listitem>
1269 </varlistentry>
1270
1271 <varlistentry id="libblkid">
1272 <term><filename class="libraryfile">libblkid</filename></term>
1273 <listitem>
1274 <para>Contains routines for device identification and token
1275 extraction</para>
1276 <indexterm zone="ch-system-util-linux libblkid">
1277 <primary sortas="c-libblkid">libblkid</primary>
1278 </indexterm>
1279 </listitem>
1280 </varlistentry>
1281
1282 <varlistentry id="libfdisk">
1283 <term><filename class="libraryfile">libfdisk</filename></term>
1284 <listitem>
1285 <para>Contains routines for manipulating partition tables</para>
1286 <indexterm zone="ch-system-util-linux libfdisk">
1287 <primary sortas="c-libfdisk">libfdisk</primary>
1288 </indexterm>
1289 </listitem>
1290 </varlistentry>
1291
1292 <varlistentry id="libmount">
1293 <term><filename class="libraryfile">libmount</filename></term>
1294 <listitem>
1295 <para>Contains routines for block device mounting and
1296 unmounting</para>
1297 <indexterm zone="ch-system-util-linux libmount">
1298 <primary sortas="c-libmount">libmount</primary>
1299 </indexterm>
1300 </listitem>
1301 </varlistentry>
1302
1303 <varlistentry id="libsmartcols">
1304 <term><filename class="libraryfile">libsmartcols</filename></term>
1305 <listitem>
1306 <para>Contains routines for aiding screen output in tabular form</para>
1307 <indexterm zone="ch-system-util-linux libsmartcols">
1308 <primary sortas="c-libsmartcols">libsmartcols</primary>
1309 </indexterm>
1310 </listitem>
1311 </varlistentry>
1312
1313 <varlistentry id="libuuid">
1314 <term><filename class="libraryfile">libuuid</filename></term>
1315 <listitem>
1316 <para>Contains routines for generating unique identifiers for objects
1317 that may be accessible beyond the local system</para>
1318 <indexterm zone="ch-system-util-linux libuuid">
1319 <primary sortas="c-libuuid">libuuid</primary>
1320 </indexterm>
1321 </listitem>
1322 </varlistentry>
1323
1324 </variablelist>
1325
1326 </sect2>
1327
1328</sect1>
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