source: chapter08/util-linux.xml@ 704e800

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Last change on this file since 704e800 was 704e800, checked in by Xi Ruoyao <xry111@…>, 3 years ago

util-linux: runstatedir=/run is also needed by sysv

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@12094 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

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