source: chapter08/util-linux.xml@ 76ef88ee

xry111/loongarch xry111/loongarch-12.0 xry111/loongarch-12.1
Last change on this file since 76ef88ee was 8e79fc49, checked in by Xi Ruoyao <xry111@…>, 13 months ago

loongarch: util-linux: Remove i386 and x86_64 from contents

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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>First, disable a problem test:</para>
46
47 <screen><userinput remap="pre">sed -i '/test_mkfds/s/^/#/' tests/helpers/Makemodule.am</userinput></screen>
48
49 <para>Disable a test which does not compile on LoongArch:</para>
50
51 <screen><userinput remap="pre">sed -i '/test_enosys/s/^/#/' tests/helpers/Makemodule.am</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 --bindir=/usr/bin \
57 --libdir=/usr/lib \
58 --runstatedir=/run \
59 --sbindir=/usr/sbin \
60 --disable-chfn-chsh \
61 --disable-login \
62 --disable-nologin \
63 --disable-su \
64 --disable-setpriv \
65 --disable-runuser \
66 --disable-pylibmount \
67 --disable-static \
68 --without-python \
69 --without-systemd \
70 --without-systemdsystemunitdir \
71 --docdir=/usr/share/doc/util-linux-&util-linux-version;</userinput></screen>
72
73<screen revision="systemd"><userinput remap="configure">./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
74 --bindir=/usr/bin \
75 --libdir=/usr/lib \
76 --runstatedir=/run \
77 --sbindir=/usr/sbin \
78 --disable-chfn-chsh \
79 --disable-login \
80 --disable-nologin \
81 --disable-su \
82 --disable-setpriv \
83 --disable-runuser \
84 --disable-pylibmount \
85 --disable-static \
86 --without-python \
87 --docdir=/usr/share/doc/util-linux-&util-linux-version;</userinput></screen>
88
89 <para>The --disable and --without options prevent warnings about
90 building components that either require packages not in LFS, or are
91 inconsistent with programs installed by other packages.</para>
92
93 <para>Compile the package:</para>
94
95<screen><userinput remap="make">make</userinput></screen>
96
97 <para>If desired, run the test suite as a non-&root; user:</para>
98
99 <warning><para>Running the test suite as the
100 <systemitem class="username">root</systemitem> user can be harmful to
101 your system. To run it, the CONFIG_SCSI_DEBUG option for the kernel must
102 be available in the currently running system and must be built as a
103 module. Building it into the kernel will prevent booting. For complete
104 coverage, other BLFS packages must be installed. If desired, this test can
105 be run by booting into the completed LFS system and running:</para>
106
107<screen role="nodump"><userinput>bash tests/run.sh --srcdir=$PWD --builddir=$PWD</userinput></screen>
108 </warning>
109
110<screen><userinput remap="test">chown -Rv tester .
111su tester -c "make -k check"</userinput></screen>
112
113 <para>The <emphasis>hardlink</emphasis> tests will fail if the host's kernel
114 does not have the option <option>CONFIG_CRYPTO_USER_API_HASH</option>
115 enabled or does not have any options providing a SHA256 implementation
116 (for example, <option>CONFIG_CRYPTO_SHA256</option>, or
117 <option>CONFIG_CRYPTO_SHA256_SSSE3</option> if the CPU supports
118 Supplemental SSE3) enabled. In addition,
119 two sub-tests from misc: mbsencode and one sub-test from script: replay are
120 known to fail.</para>
121
122 <!-- Related to non-4K page size. -->
123 <para>Two tests named <filename>fadvise/drop</filename> and
124 <filename>fincore/count</filename> are known to fail.</para>
125
126 <para>Install the package:</para>
127
128<screen><userinput remap="install">make install</userinput></screen>
129<!--
130 <para>Finally, install the man pages:</para>
131
132<screen><userinput remap="install">tar -xf ../util-linux-man-pages-&util-linux-version;.tar.xz - -directory /usr/share/man - -strip-components=1</userinput></screen>
133-->
134 </sect2>
135
136 <sect2 id="contents-utillinux" role="content">
137 <title>Contents of Util-linux</title>
138
139 <segmentedlist>
140 <segtitle>Installed programs</segtitle>
141 <segtitle>Installed libraries</segtitle>
142 <segtitle>Installed directories</segtitle>
143
144 <seglistitem>
145 <seg>addpart, agetty, blkdiscard, blkid, blkzone, blockdev, cal, cfdisk, chcpu,
146 chmem, choom, chrt, col, colcrt, colrm, column, ctrlaltdel, delpart, dmesg,
147 eject, fallocate, fdisk, fincore, findfs, findmnt, flock, fsck,
148 fsck.cramfs, fsck.minix, fsfreeze, fstrim, getopt, hardlink, hexdump, hwclock,
149 ionice, ipcmk, ipcrm, ipcs, irqtop, isosize, kill, last,
150 lastb (link to last), ldattach, linux32 (link to setarch), linux64 (link to setarch),
151 logger, look, losetup, lsblk, lscpu, lsipc, lsirq, lsfd, lslocks, lslogins,
152 lsmem, lsns, mcookie, mesg, mkfs, mkfs.bfs, mkfs.cramfs, mkfs.minix, mkswap,
153 more, mount, mountpoint, namei, nsenter, partx, pivot_root, prlimit,
154 readprofile, rename, renice, resizepart, rev, rfkill, rtcwake, script,
155 scriptlive, scriptreplay, setarch, setsid, setterm, sfdisk, sulogin, swaplabel,
156 swapoff, swapon, switch_root, taskset, uclampset, ul,
157 umount, uname26 (link to setarch), unshare, utmpdump, uuidd, uuidgen, uuidparse,
158 wall, wdctl, whereis, wipefs, and zramctl</seg>
159 <seg>libblkid.so, libfdisk.so, libmount.so,
160 libsmartcols.so, and libuuid.so</seg>
161 <seg>/usr/include/blkid,
162 /usr/include/libfdisk,
163 /usr/include/libmount,
164 /usr/include/libsmartcols,
165 /usr/include/uuid,
166 /usr/share/doc/util-linux-&util-linux-version;,
167 and /var/lib/hwclock</seg>
168 </seglistitem>
169 </segmentedlist>
170
171 <variablelist>
172 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
173 <?dbfo list-presentation="list"?>
174 <?dbhtml list-presentation="table"?>
175
176 <varlistentry id="addpart">
177 <term><command>addpart</command></term>
178 <listitem>
179 <para>Informs the Linux kernel of new partitions</para>
180 <indexterm zone="ch-system-util-linux addpart">
181 <primary sortas="b-addpart">addpart</primary>
182 </indexterm>
183 </listitem>
184 </varlistentry>
185
186 <varlistentry id="agetty">
187 <term><command>agetty</command></term>
188 <listitem>
189 <para>Opens a tty port, prompts for a login name,
190 and then invokes the <command>login</command> program</para>
191 <indexterm zone="ch-system-util-linux agetty">
192 <primary sortas="b-agetty">agetty</primary>
193 </indexterm>
194 </listitem>
195 </varlistentry>
196
197 <varlistentry id="blkdiscard">
198 <term><command>blkdiscard</command></term>
199 <listitem>
200 <para>Discards sectors on a device</para>
201 <indexterm zone="ch-system-util-linux blkdiscard">
202 <primary sortas="b-blkdiscard">blkdiscard</primary>
203 </indexterm>
204 </listitem>
205 </varlistentry>
206
207 <varlistentry id="blkid">
208 <term><command>blkid</command></term>
209 <listitem>
210 <para>A command line utility to locate and print block device
211 attributes</para>
212 <indexterm zone="ch-system-util-linux blkid">
213 <primary sortas="b-blkid">blkid</primary>
214 </indexterm>
215 </listitem>
216 </varlistentry>
217
218 <varlistentry id="blkzone">
219 <term><command>blkzone</command></term>
220 <listitem>
221 <para>Is used to manage zoned storage block devices</para>
222 <indexterm zone="ch-system-util-linux blkzone">
223 <primary sortas="b-blkzone">blkzone</primary>
224 </indexterm>
225 </listitem>
226 </varlistentry>
227
228 <varlistentry id="blockdev">
229 <term><command>blockdev</command></term>
230 <listitem>
231 <para>Allows users to call block device ioctls from the command
232 line</para>
233 <indexterm zone="ch-system-util-linux blockdev">
234 <primary sortas="b-blockdev">blockdev</primary>
235 </indexterm>
236 </listitem>
237 </varlistentry>
238
239 <varlistentry id="cal">
240 <term><command>cal</command></term>
241 <listitem>
242 <para>Displays a simple calendar</para>
243 <indexterm zone="ch-system-util-linux cal">
244 <primary sortas="b-cal">cal</primary>
245 </indexterm>
246 </listitem>
247 </varlistentry>
248
249 <varlistentry id="cfdisk">
250 <term><command>cfdisk</command></term>
251 <listitem>
252 <para>Manipulates the partition table of the given device</para>
253 <indexterm zone="ch-system-util-linux cfdisk">
254 <primary sortas="b-cfdisk">cfdisk</primary>
255 </indexterm>
256 </listitem>
257 </varlistentry>
258
259 <varlistentry id="chcpu">
260 <term><command>chcpu</command></term>
261 <listitem>
262 <para>Modifies the state of CPUs</para>
263 <indexterm zone="ch-system-util-linux chcpu">
264 <primary sortas="b-chcpu">chcpu</primary>
265 </indexterm>
266 </listitem>
267 </varlistentry>
268
269 <varlistentry id="chmem">
270 <term><command>chmem</command></term>
271 <listitem>
272 <para>Configures memory</para>
273 <indexterm zone="ch-system-util-linux chmem">
274 <primary sortas="b-chmem">chmem</primary>
275 </indexterm>
276 </listitem>
277 </varlistentry>
278
279 <varlistentry id="choom">
280 <term><command>choom</command></term>
281 <listitem>
282 <para>Displays and adjusts OOM-killer scores, used to determine
283 which process to kill first when Linux is Out Of Memory</para>
284 <indexterm zone="ch-system-util-linux choom">
285 <primary sortas="b-choom">choom</primary>
286 </indexterm>
287 </listitem>
288 </varlistentry>
289
290 <varlistentry id="chrt">
291 <term><command>chrt</command></term>
292 <listitem>
293 <para>Manipulates real-time attributes of a process</para>
294 <indexterm zone="ch-system-util-linux chrt">
295 <primary sortas="b-chrt">chrt</primary>
296 </indexterm>
297 </listitem>
298 </varlistentry>
299
300 <varlistentry id="col">
301 <term><command>col</command></term>
302 <listitem>
303 <para>Filters out reverse line feeds</para>
304 <indexterm zone="ch-system-util-linux col">
305 <primary sortas="b-col">col</primary>
306 </indexterm>
307 </listitem>
308 </varlistentry>
309
310 <varlistentry id="colcrt">
311 <term><command>colcrt</command></term>
312 <listitem>
313 <para>Filters <command>nroff</command> output for terminals
314 that lack some capabilities, such as overstriking and half-lines</para>
315 <indexterm zone="ch-system-util-linux colcrt">
316 <primary sortas="b-colcrt">colcrt</primary>
317 </indexterm>
318 </listitem>
319 </varlistentry>
320
321 <varlistentry id="colrm">
322 <term><command>colrm</command></term>
323 <listitem>
324 <para>Filters out the given columns</para>
325 <indexterm zone="ch-system-util-linux colrm">
326 <primary sortas="b-colrm">colrm</primary>
327 </indexterm>
328 </listitem>
329 </varlistentry>
330
331 <varlistentry id="column">
332 <term><command>column</command></term>
333 <listitem>
334 <para>Formats a given file into multiple columns</para>
335 <indexterm zone="ch-system-util-linux column">
336 <primary sortas="b-column">column</primary>
337 </indexterm>
338 </listitem>
339 </varlistentry>
340
341 <varlistentry id="ctrlaltdel">
342 <term><command>ctrlaltdel</command></term>
343 <listitem>
344 <para>Sets the function of the Ctrl+Alt+Del key combination to a
345 hard or a soft reset</para>
346 <indexterm zone="ch-system-util-linux ctrlaltdel">
347 <primary sortas="b-ctrlaltdel">ctrlaltdel</primary>
348 </indexterm>
349 </listitem>
350 </varlistentry>
351
352 <varlistentry id="delpart">
353 <term><command>delpart</command></term>
354 <listitem>
355 <para>Asks the Linux kernel to remove a partition</para>
356 <indexterm zone="ch-system-util-linux delpart">
357 <primary sortas="b-delpart">delpart</primary>
358 </indexterm>
359 </listitem>
360 </varlistentry>
361
362 <varlistentry id="dmesg">
363 <term><command>dmesg</command></term>
364 <listitem>
365 <para>Dumps the kernel boot messages</para>
366 <indexterm zone="ch-system-util-linux dmesg">
367 <primary sortas="b-dmesg">dmesg</primary>
368 </indexterm>
369 </listitem>
370 </varlistentry>
371
372 <varlistentry id="eject">
373 <term><command>eject</command></term>
374 <listitem>
375 <para>Ejects removable media</para>
376 <indexterm zone="ch-system-util-linux eject">
377 <primary sortas="b-eject">eject</primary>
378 </indexterm>
379 </listitem>
380 </varlistentry>
381
382 <varlistentry id="fallocate">
383 <term><command>fallocate</command></term>
384 <listitem>
385 <para>Preallocates space to a file</para>
386 <indexterm zone="ch-system-util-linux fallocate">
387 <primary sortas="b-fallocate">fallocate</primary>
388 </indexterm>
389 </listitem>
390 </varlistentry>
391
392 <varlistentry id="fdisk">
393 <term><command>fdisk</command></term>
394 <listitem>
395 <para>Manipulates the partition table of the given device</para>
396 <indexterm zone="ch-system-util-linux fdisk">
397 <primary sortas="b-fdisk">fdisk</primary>
398 </indexterm>
399 </listitem>
400 </varlistentry>
401
402 <varlistentry id="fincore">
403 <term><command>fincore</command></term>
404 <listitem>
405 <para>Counts pages of file contents in core</para>
406 <indexterm zone="ch-system-util-linux fincore">
407 <primary sortas="b-fincore">fincore</primary>
408 </indexterm>
409 </listitem>
410 </varlistentry>
411
412 <varlistentry id="findfs">
413 <term><command>findfs</command></term>
414 <listitem>
415 <para>Finds a file system, either by label or Universally Unique Identifier
416 (UUID)</para>
417 <indexterm zone="ch-system-util-linux findfs">
418 <primary sortas="b-findfs">findfs</primary>
419 </indexterm>
420 </listitem>
421 </varlistentry>
422
423 <varlistentry id="findmnt">
424 <term><command>findmnt</command></term>
425 <listitem>
426 <para>Is a command line interface to the libmount library
427 for working with mountinfo, fstab and mtab files</para>
428 <indexterm zone="ch-system-util-linux findmnt">
429 <primary sortas="b-findmnt">findmnt</primary>
430 </indexterm>
431 </listitem>
432 </varlistentry>
433
434 <varlistentry id="flock">
435 <term><command>flock</command></term>
436 <listitem>
437 <para>Acquires a file lock and then executes a command with the lock
438 held</para>
439 <indexterm zone="ch-system-util-linux flock">
440 <primary sortas="b-flock">flock</primary>
441 </indexterm>
442 </listitem>
443 </varlistentry>
444
445 <varlistentry id="fsck">
446 <term><command>fsck</command></term>
447 <listitem>
448 <para>Is used to check, and optionally repair, file systems</para>
449 <indexterm zone="ch-system-util-linux fsck">
450 <primary sortas="b-fsck">fsck</primary>
451 </indexterm>
452 </listitem>
453 </varlistentry>
454
455 <varlistentry id="fsck.cramfs">
456 <term><command>fsck.cramfs</command></term>
457 <listitem>
458 <para>Performs a consistency check on the Cramfs file system on the
459 given device</para>
460 <indexterm zone="ch-system-util-linux fsck.cramfs">
461 <primary sortas="b-fsck.cramfs">fsck.cramfs</primary>
462 </indexterm>
463 </listitem>
464 </varlistentry>
465
466 <varlistentry id="fsck.minix">
467 <term><command>fsck.minix</command></term>
468 <listitem>
469 <para>Performs a consistency check on the Minix file system on the
470 given device</para>
471 <indexterm zone="ch-system-util-linux fsck.minix">
472 <primary sortas="b-fsck.minix">fsck.minix</primary>
473 </indexterm>
474 </listitem>
475 </varlistentry>
476
477 <varlistentry id="fsfreeze">
478 <term><command>fsfreeze</command></term>
479 <listitem>
480 <para>Is a very simple wrapper around FIFREEZE/FITHAW ioctl
481 kernel driver operations</para>
482 <indexterm zone="ch-system-util-linux fsfreeze">
483 <primary sortas="b-fsfreeze">fsfreeze</primary>
484 </indexterm>
485 </listitem>
486 </varlistentry>
487
488 <varlistentry id="fstrim">
489 <term><command>fstrim</command></term>
490 <listitem>
491 <para>Discards unused blocks on a mounted filesystem</para>
492 <indexterm zone="ch-system-util-linux fstrim">
493 <primary sortas="b-fstrim">fstrim</primary>
494 </indexterm>
495 </listitem>
496 </varlistentry>
497
498 <varlistentry id="getopt">
499 <term><command>getopt</command></term>
500 <listitem>
501 <para>Parses options in the given command line</para>
502 <indexterm zone="ch-system-util-linux getopt">
503 <primary sortas="b-getopt">getopt</primary>
504 </indexterm>
505 </listitem>
506 </varlistentry>
507
508 <varlistentry id="hardlink">
509 <term><command>hardlink</command></term>
510 <listitem>
511 <para>Consolidates duplicate files by creating hard links</para>
512 <indexterm zone="ch-system-util-linux hardlink">
513 <primary sortas="b-hardlink">hardlink</primary>
514 </indexterm>
515 </listitem>
516 </varlistentry>
517
518 <varlistentry id="hexdump">
519 <term><command>hexdump</command></term>
520 <listitem>
521 <para>Dumps the given file in hexadecimal, decimal, octal,
522 or ascii</para>
523 <indexterm zone="ch-system-util-linux hexdump">
524 <primary sortas="b-hexdump">hexdump</primary>
525 </indexterm>
526 </listitem>
527 </varlistentry>
528
529 <varlistentry id="hwclock">
530 <term><command>hwclock</command></term>
531 <listitem>
532 <para>Reads or sets the system's hardware clock, also called
533 the Real-Time Clock (RTC) or Basic Input-Output System (BIOS)
534 clock</para>
535 <indexterm zone="ch-system-util-linux hwclock">
536 <primary sortas="b-hwclock">hwclock</primary>
537 </indexterm>
538 </listitem>
539 </varlistentry>
540
541 <varlistentry id="ionice">
542 <term><command>ionice</command></term>
543 <listitem>
544 <para>Gets or sets the io scheduling class and priority for a program</para>
545 <indexterm zone="ch-system-util-linux ionice">
546 <primary sortas="b-ionice">ionice</primary>
547 </indexterm>
548 </listitem>
549 </varlistentry>
550
551 <varlistentry id="ipcmk">
552 <term><command>ipcmk</command></term>
553 <listitem>
554 <para>Creates various IPC resources</para>
555 <indexterm zone="ch-system-util-linux ipcmk">
556 <primary sortas="b-ipcmk">ipcmk</primary>
557 </indexterm>
558 </listitem>
559 </varlistentry>
560
561 <varlistentry id="ipcrm">
562 <term><command>ipcrm</command></term>
563 <listitem>
564 <para>Removes the given Inter-Process Communication (IPC) resource</para>
565 <indexterm zone="ch-system-util-linux ipcrm">
566 <primary sortas="b-ipcrm">ipcrm</primary>
567 </indexterm>
568 </listitem>
569 </varlistentry>
570
571 <varlistentry id="ipcs">
572 <term><command>ipcs</command></term>
573 <listitem>
574 <para>Provides IPC status information</para>
575 <indexterm zone="ch-system-util-linux ipcs">
576 <primary sortas="b-ipcs">ipcs</primary>
577 </indexterm>
578 </listitem>
579 </varlistentry>
580
581 <varlistentry id="irqtop">
582 <term><command>irqtop</command></term>
583 <listitem>
584 <para>Displays kernel interrupt counter information in
585 <filename>top(1)</filename> style view</para>
586 <indexterm zone="ch-system-util-linux irqtop">
587 <primary sortas="b-irqtop">irqtop</primary>
588 </indexterm>
589 </listitem>
590 </varlistentry>
591
592 <varlistentry id="isosize">
593 <term><command>isosize</command></term>
594 <listitem>
595 <para>Reports the size of an iso9660 file system</para>
596 <indexterm zone="ch-system-util-linux isosize">
597 <primary sortas="b-isosize">isosize</primary>
598 </indexterm>
599 </listitem>
600 </varlistentry>
601
602 <varlistentry id="kill">
603 <term><command>kill</command></term>
604 <listitem>
605 <para>Sends signals to processes</para>
606 <indexterm zone="ch-system-util-linux kill">
607 <primary sortas="b-kill">kill</primary>
608 </indexterm>
609 </listitem>
610 </varlistentry>
611
612 <varlistentry id="last">
613 <term><command>last</command></term>
614 <listitem>
615 <para>Shows which users last logged in (and out), searching back
616 through the <filename>/var/log/wtmp</filename> file; it also shows
617 system boots, shutdowns, and run-level changes</para>
618 <indexterm zone="ch-system-util-linux last">
619 <primary sortas="b-last">last</primary>
620 </indexterm>
621 </listitem>
622 </varlistentry>
623
624 <varlistentry id="lastb">
625 <term><command>lastb</command></term>
626 <listitem>
627 <para>Shows the failed login attempts, as logged in
628 <filename>/var/log/btmp</filename></para>
629 <indexterm zone="ch-system-util-linux lastb">
630 <primary sortas="b-lastb">lastb</primary>
631 </indexterm>
632 </listitem>
633 </varlistentry>
634
635 <varlistentry id="ldattach">
636 <term><command>ldattach</command></term>
637 <listitem>
638 <para>Attaches a line discipline to a serial line</para>
639 <indexterm zone="ch-system-util-linux ldattach">
640 <primary sortas="b-ldattach">ldattach</primary>
641 </indexterm>
642 </listitem>
643 </varlistentry>
644
645 <varlistentry id="linux32">
646 <term><command>linux32</command></term>
647 <listitem>
648 <para>A symbolic link to setarch</para>
649 <indexterm zone="ch-system-util-linux linux32">
650 <primary sortas="b-linux32">linux32</primary>
651 </indexterm>
652 </listitem>
653 </varlistentry>
654
655 <varlistentry id="linux64">
656 <term><command>linux64</command></term>
657 <listitem>
658 <para>A symbolic link to setarch</para>
659 <indexterm zone="ch-system-util-linux linux64">
660 <primary sortas="b-linux64">linux64</primary>
661 </indexterm>
662 </listitem>
663 </varlistentry>
664
665 <varlistentry id="logger">
666 <term><command>logger</command></term>
667 <listitem>
668 <para>Enters the given message into the system log</para>
669 <indexterm zone="ch-system-util-linux logger">
670 <primary sortas="b-logger">logger</primary>
671 </indexterm>
672 </listitem>
673 </varlistentry>
674
675 <varlistentry id="look">
676 <term><command>look</command></term>
677 <listitem>
678 <para>Displays lines that begin with the given string</para>
679 <indexterm zone="ch-system-util-linux look">
680 <primary sortas="b-look">look</primary>
681 </indexterm>
682 </listitem>
683 </varlistentry>
684
685 <varlistentry id="losetup">
686 <term><command>losetup</command></term>
687 <listitem>
688 <para>Sets up and controls loop devices</para>
689 <indexterm zone="ch-system-util-linux losetup">
690 <primary sortas="b-losetup">losetup</primary>
691 </indexterm>
692 </listitem>
693 </varlistentry>
694
695 <varlistentry id="lsblk">
696 <term><command>lsblk</command></term>
697 <listitem>
698 <para>Lists information about all or selected block devices in
699 a tree-like format</para>
700 <indexterm zone="ch-system-util-linux lsblk">
701 <primary sortas="b-lsblk">lsblk</primary>
702 </indexterm>
703 </listitem>
704 </varlistentry>
705
706 <varlistentry id="lscpu">
707 <term><command>lscpu</command></term>
708 <listitem>
709 <para>Prints CPU architecture information</para>
710 <indexterm zone="ch-system-util-linux lscpu">
711 <primary sortas="b-lscpu">lscpu</primary>
712 </indexterm>
713 </listitem>
714 </varlistentry>
715
716 <varlistentry id="lsfd">
717 <term><command>lsfd</command></term>
718 <listitem>
719 <para>Displays information about open files; replaces <command>lsof</command></para>
720 <indexterm zone="ch-system-util-linux lsfd">
721 <primary sortas="b-lsfd">lsfd</primary>
722 </indexterm>
723 </listitem>
724 </varlistentry>
725
726 <varlistentry id="lsipc">
727 <term><command>lsipc</command></term>
728 <listitem>
729 <para>Prints information on IPC facilities currently employed
730 in the system</para>
731 <indexterm zone="ch-system-util-linux lsipc">
732 <primary sortas="b-lsipc">lsipc</primary>
733 </indexterm>
734 </listitem>
735 </varlistentry>
736
737 <varlistentry id="lsirq">
738 <term><command>lsirq</command></term>
739 <listitem>
740 <para>Displays kernel interrupt counter information</para>
741 <indexterm zone="ch-system-util-linux lsirq">
742 <primary sortas="b-lsirq">lsirq</primary>
743 </indexterm>
744 </listitem>
745 </varlistentry>
746
747 <varlistentry id="lslocks">
748 <term><command>lslocks</command></term>
749 <listitem>
750 <para>Lists local system locks</para>
751 <indexterm zone="ch-system-util-linux lslocks">
752 <primary sortas="b-lslocks">lslocks</primary>
753 </indexterm>
754 </listitem>
755 </varlistentry>
756
757 <varlistentry id="lslogins">
758 <term><command>lslogins</command></term>
759 <listitem>
760 <para>Lists information about users, groups and system accounts</para>
761 <indexterm zone="ch-system-util-linux lslogins">
762 <primary sortas="b-lslogins">lslogins</primary>
763 </indexterm>
764 </listitem>
765 </varlistentry>
766
767 <varlistentry id="lsmem">
768 <term><command>lsmem</command></term>
769 <listitem>
770 <para>Lists the ranges of available memory with their online
771 status</para>
772 <indexterm zone="ch-system-util-linux lsmem">
773 <primary sortas="b-lsmem">lsmem</primary>
774 </indexterm>
775 </listitem>
776 </varlistentry>
777
778 <varlistentry id="lsns">
779 <term><command>lsns</command></term>
780 <listitem>
781 <para>Lists namespaces</para>
782 <indexterm zone="ch-system-util-linux lsns">
783 <primary sortas="b-lsns">lsns</primary>
784 </indexterm>
785 </listitem>
786 </varlistentry>
787
788 <varlistentry id="mcookie">
789 <term><command>mcookie</command></term>
790 <listitem>
791 <para>Generates magic cookies (128-bit random hexadecimal numbers) for
792 <command>xauth</command></para>
793 <indexterm zone="ch-system-util-linux mcookie">
794 <primary sortas="b-mcookie">mcookie</primary>
795 </indexterm>
796 </listitem>
797 </varlistentry>
798
799 <varlistentry id="mesg">
800 <term><command>mesg</command></term>
801 <listitem>
802 <para>Controls whether other users can send messages to the current
803 user's terminal</para>
804 <indexterm zone="ch-system-util-linux mesg">
805 <primary sortas="b-mesg">mesg</primary>
806 </indexterm>
807 </listitem>
808 </varlistentry>
809
810 <varlistentry id="mkfs">
811 <term><command>mkfs</command></term>
812 <listitem>
813 <para>Builds a file system on a device (usually a hard disk
814 partition)</para>
815 <indexterm zone="ch-system-util-linux mkfs">
816 <primary sortas="b-mkfs">mkfs</primary>
817 </indexterm>
818 </listitem>
819 </varlistentry>
820
821 <varlistentry id="mkfs.bfs">
822 <term><command>mkfs.bfs</command></term>
823 <listitem>
824 <para>Creates a Santa Cruz Operations (SCO) bfs file system</para>
825 <indexterm zone="ch-system-util-linux mkfs.bfs">
826 <primary sortas="b-mkfs.bfs">mkfs.bfs</primary>
827 </indexterm>
828 </listitem>
829 </varlistentry>
830
831 <varlistentry id="mkfs.cramfs">
832 <term><command>mkfs.cramfs</command></term>
833 <listitem>
834 <para>Creates a cramfs file system</para>
835 <indexterm zone="ch-system-util-linux mkfs.cramfs">
836 <primary sortas="b-mkfs.cramfs">mkfs.cramfs</primary>
837 </indexterm>
838 </listitem>
839 </varlistentry>
840
841 <varlistentry id="mkfs.minix">
842 <term><command>mkfs.minix</command></term>
843 <listitem>
844 <para>Creates a Minix file system</para>
845 <indexterm zone="ch-system-util-linux mkfs.minix">
846 <primary sortas="b-mkfs.minix">mkfs.minix</primary>
847 </indexterm>
848 </listitem>
849 </varlistentry>
850
851 <varlistentry id="mkswap">
852 <term><command>mkswap</command></term>
853 <listitem>
854 <para>Initializes the given device or file to be used as a swap
855 area</para>
856 <indexterm zone="ch-system-util-linux mkswap">
857 <primary sortas="b-mkswap">mkswap</primary>
858 </indexterm>
859 </listitem>
860 </varlistentry>
861
862 <varlistentry id="more">
863 <term><command>more</command></term>
864 <listitem>
865 <para>A filter for paging through text one screen at a time</para>
866 <indexterm zone="ch-system-util-linux more">
867 <primary sortas="b-more">more</primary>
868 </indexterm>
869 </listitem>
870 </varlistentry>
871
872 <varlistentry id="mount">
873 <term><command>mount</command></term>
874 <listitem>
875 <para>Attaches the file system on the given device to a specified
876 directory in the file-system tree</para>
877 <indexterm zone="ch-system-util-linux mount">
878 <primary sortas="b-mount">mount</primary>
879 </indexterm>
880 </listitem>
881 </varlistentry>
882
883 <varlistentry id="mountpoint">
884 <term><command>mountpoint</command></term>
885 <listitem>
886 <para>Checks if the directory is a mountpoint</para>
887 <indexterm zone="ch-system-util-linux mountpoint">
888 <primary sortas="b-mountpoint">mountpoint</primary>
889 </indexterm>
890 </listitem>
891 </varlistentry>
892
893 <varlistentry id="namei">
894 <term><command>namei</command></term>
895 <listitem>
896 <para>Shows the symbolic links in the given paths</para>
897 <indexterm zone="ch-system-util-linux namei">
898 <primary sortas="b-namei">namei</primary>
899 </indexterm>
900 </listitem>
901 </varlistentry>
902
903 <varlistentry id="nsenter">
904 <term><command>nsenter</command></term>
905 <listitem>
906 <para>Runs a program with namespaces of other processes</para>
907 <indexterm zone="ch-system-util-linux nsenter">
908 <primary sortas="b-nsenter">nsenter</primary>
909 </indexterm>
910 </listitem>
911 </varlistentry>
912
913 <varlistentry id="partx">
914 <term><command>partx</command></term>
915 <listitem>
916 <para>Tells the kernel about the presence and numbering of on-disk
917 partitions</para>
918 <indexterm zone="ch-system-util-linux partx">
919 <primary sortas="b-partx">partx</primary>
920 </indexterm>
921 </listitem>
922 </varlistentry>
923
924 <varlistentry id="pivot_root">
925 <term><command>pivot_root</command></term>
926 <listitem>
927 <para>Makes the given file system the new root file system of the
928 current process</para>
929 <indexterm zone="ch-system-util-linux pivot_root">
930 <primary sortas="b-pivot_root">pivot_root</primary>
931 </indexterm>
932 </listitem>
933 </varlistentry>
934
935 <varlistentry id="prlimit">
936 <term><command>prlimit</command></term>
937 <listitem>
938 <para>Gets and sets a process's resource limits</para>
939 <indexterm zone="ch-system-util-linux prlimit">
940 <primary sortas="b-prlimit">prlimit</primary>
941 </indexterm>
942 </listitem>
943 </varlistentry>
944
945 <varlistentry id="readprofile">
946 <term><command>readprofile</command></term>
947 <listitem>
948 <para>Reads kernel profiling information</para>
949 <indexterm zone="ch-system-util-linux readprofile">
950 <primary sortas="b-readprofile">readprofile</primary>
951 </indexterm>
952 </listitem>
953 </varlistentry>
954
955 <varlistentry id="rename">
956 <term><command>rename</command></term>
957 <listitem>
958 <para>Renames the given files, replacing a given string with
959 another</para>
960 <indexterm zone="ch-system-util-linux rename">
961 <primary sortas="b-rename">rename</primary>
962 </indexterm>
963 </listitem>
964 </varlistentry>
965
966 <varlistentry id="renice">
967 <term><command>renice</command></term>
968 <listitem>
969 <para>Alters the priority of running processes</para>
970 <indexterm zone="ch-system-util-linux renice">
971 <primary sortas="b-renice">renice</primary>
972 </indexterm>
973 </listitem>
974 </varlistentry>
975
976 <varlistentry id="resizepart">
977 <term><command>resizepart</command></term>
978 <listitem>
979 <para>Asks the Linux kernel to resize a partition</para>
980 <indexterm zone="ch-system-util-linux resizepart">
981 <primary sortas="b-resizepart">resizepart</primary>
982 </indexterm>
983 </listitem>
984 </varlistentry>
985
986 <varlistentry id="rev">
987 <term><command>rev</command></term>
988 <listitem>
989 <para>Reverses the lines of a given file</para>
990 <indexterm zone="ch-system-util-linux rev">
991 <primary sortas="b-rev">rev</primary>
992 </indexterm>
993 </listitem>
994 </varlistentry>
995
996 <varlistentry id="rfkill">
997 <term><command>rfkill</command></term>
998 <listitem>
999 <para>Tool for enabling and disabling wireless devices</para>
1000 <indexterm zone="ch-system-util-linux rfkill">
1001 <primary sortas="b-rfkill">rfkill</primary>
1002 </indexterm>
1003 </listitem>
1004 </varlistentry>
1005
1006 <varlistentry id="rtcwake">
1007 <term><command>rtcwake</command></term>
1008 <listitem>
1009 <para>Used to enter a system sleep state until the specified wakeup
1010 time</para>
1011 <indexterm zone="ch-system-util-linux rtcwake">
1012 <primary sortas="b-rtcwake">rtcwake</primary>
1013 </indexterm>
1014 </listitem>
1015 </varlistentry>
1016
1017 <varlistentry id="script">
1018 <term><command>script</command></term>
1019 <listitem>
1020 <para>Makes a typescript of a terminal session</para>
1021 <indexterm zone="ch-system-util-linux script">
1022 <primary sortas="b-script">script</primary>
1023 </indexterm>
1024 </listitem>
1025 </varlistentry>
1026
1027 <varlistentry id="scriptlive">
1028 <term><command>scriptlive</command></term>
1029 <listitem>
1030 <para>Re-runs session typescripts using timing information</para>
1031 <indexterm zone="ch-system-util-linux scriptlive">
1032 <primary sortas="b-scriptlive">scriptlive</primary>
1033 </indexterm>
1034 </listitem>
1035 </varlistentry>
1036
1037 <varlistentry id="scriptreplay">
1038 <term><command>scriptreplay</command></term>
1039 <listitem>
1040 <para>Plays back typescripts using timing information</para>
1041 <indexterm zone="ch-system-util-linux scriptreplay">
1042 <primary sortas="b-scriptreplay">scriptreplay</primary>
1043 </indexterm>
1044 </listitem>
1045 </varlistentry>
1046
1047 <varlistentry id="setarch">
1048 <term><command>setarch</command></term>
1049 <listitem>
1050 <para>Changes reported architecture in a new program environment, and
1051 sets personality flags</para>
1052 <indexterm zone="ch-system-util-linux setarch">
1053 <primary sortas="b-setarch">setarch</primary>
1054 </indexterm>
1055 </listitem>
1056 </varlistentry>
1057
1058 <varlistentry id="setsid">
1059 <term><command>setsid</command></term>
1060 <listitem>
1061 <para>Runs the given program in a new session</para>
1062 <indexterm zone="ch-system-util-linux setsid">
1063 <primary sortas="b-setsid">setsid</primary>
1064 </indexterm>
1065 </listitem>
1066 </varlistentry>
1067
1068 <varlistentry id="setterm">
1069 <term><command>setterm</command></term>
1070 <listitem>
1071 <para>Sets terminal attributes</para>
1072 <indexterm zone="ch-system-util-linux setterm">
1073 <primary sortas="b-setterm">setterm</primary>
1074 </indexterm>
1075 </listitem>
1076 </varlistentry>
1077
1078 <varlistentry id="sfdisk">
1079 <term><command>sfdisk</command></term>
1080 <listitem>
1081 <para>A disk partition table manipulator</para>
1082 <indexterm zone="ch-system-util-linux sfdisk">
1083 <primary sortas="b-sfdisk">sfdisk</primary>
1084 </indexterm>
1085 </listitem>
1086 </varlistentry>
1087
1088 <varlistentry id="sulogin">
1089 <term><command>sulogin</command></term>
1090 <listitem>
1091 <para>Allows <systemitem class="username">root</systemitem> to log in;
1092 it is normally invoked by <command>init</command> when the system goes
1093 into single user mode</para>
1094 <indexterm zone="ch-system-util-linux sulogin">
1095 <primary sortas="b-sulogin">sulogin</primary>
1096 </indexterm>
1097 </listitem>
1098 </varlistentry>
1099
1100 <varlistentry id="swaplabel">
1101 <term><command>swaplabel</command></term>
1102 <listitem>
1103 <para>Makes changes to the swap area's UUID and label</para>
1104 <indexterm zone="ch-system-util-linux swaplabel">
1105 <primary sortas="b-swaplabel">swaplabel</primary>
1106 </indexterm>
1107 </listitem>
1108 </varlistentry>
1109
1110 <varlistentry id="swapoff">
1111 <term><command>swapoff</command></term>
1112 <listitem>
1113 <para>Disables devices and files for paging and swapping</para>
1114 <indexterm zone="ch-system-util-linux swapoff">
1115 <primary sortas="b-swapoff">swapoff</primary>
1116 </indexterm>
1117 </listitem>
1118 </varlistentry>
1119
1120 <varlistentry id="swapon">
1121 <term><command>swapon</command></term>
1122 <listitem>
1123 <para>Enables devices and files for paging and swapping, and
1124 lists the devices and files currently in use</para>
1125 <indexterm zone="ch-system-util-linux swapon">
1126 <primary sortas="b-swapon">swapon</primary>
1127 </indexterm>
1128 </listitem>
1129 </varlistentry>
1130
1131 <varlistentry id="switch_root">
1132 <term><command>switch_root</command></term>
1133 <listitem>
1134 <para>Switches to another filesystem as the root of the mount tree</para>
1135 <indexterm zone="ch-system-util-linux switch_root">
1136 <primary sortas="b-switch_root">switch_root</primary>
1137 </indexterm>
1138 </listitem>
1139 </varlistentry>
1140
1141 <varlistentry id="taskset">
1142 <term><command>taskset</command></term>
1143 <listitem>
1144 <para>Retrieves or sets a process's CPU affinity</para>
1145 <indexterm zone="ch-system-util-linux taskset">
1146 <primary sortas="b-taskset">taskset</primary>
1147 </indexterm>
1148 </listitem>
1149 </varlistentry>
1150
1151 <varlistentry id="uclampset">
1152 <term><command>uclampset</command></term>
1153 <listitem>
1154 <para>Manipulates the utilization clamping attributes of the
1155 system or a process</para>
1156 <indexterm zone="ch-system-util-linux uclampset">
1157 <primary sortas="b-uclampset">uclampset</primary>
1158 </indexterm>
1159 </listitem>
1160 </varlistentry>
1161
1162 <varlistentry id="ul">
1163 <term><command>ul</command></term>
1164 <listitem>
1165 <para>A filter for translating underscores into escape sequences
1166 indicating underlining for the terminal in use</para>
1167 <indexterm zone="ch-system-util-linux ul">
1168 <primary sortas="b-ul">ul</primary>
1169 </indexterm>
1170 </listitem>
1171 </varlistentry>
1172
1173 <varlistentry id="umount">
1174 <term><command>umount</command></term>
1175 <listitem>
1176 <para>Disconnects a file system from the system's file tree</para>
1177 <indexterm zone="ch-system-util-linux umount">
1178 <primary sortas="b-umount">umount</primary>
1179 </indexterm>
1180 </listitem>
1181 </varlistentry>
1182
1183 <varlistentry id="uname26">
1184 <term><command>uname26</command></term>
1185 <listitem>
1186 <para>A symbolic link to setarch</para>
1187 <indexterm zone="ch-system-util-linux uname26">
1188 <primary sortas="b-uname26">uname26</primary>
1189 </indexterm>
1190 </listitem>
1191 </varlistentry>
1192
1193 <varlistentry id="unshare">
1194 <term><command>unshare</command></term>
1195 <listitem>
1196 <para>Runs a program with some namespaces unshared from parent</para>
1197 <indexterm zone="ch-system-util-linux unshare">
1198 <primary sortas="b-unshare">unshare</primary>
1199 </indexterm>
1200 </listitem>
1201 </varlistentry>
1202
1203 <varlistentry id="utmpdump">
1204 <term><command>utmpdump</command></term>
1205 <listitem>
1206 <para>Displays the content of the given login file in a
1207 user-friendly format</para>
1208 <indexterm zone="ch-system-util-linux utmpdump">
1209 <primary sortas="b-utmpdump">utmpdump</primary>
1210 </indexterm>
1211 </listitem>
1212 </varlistentry>
1213
1214 <varlistentry id="uuidd">
1215 <term><command>uuidd</command></term>
1216 <listitem>
1217 <para>A daemon used by the UUID library to generate time-based
1218 UUIDs in a secure and guaranteed-unique fashion</para>
1219 <indexterm zone="ch-system-util-linux uuidd">
1220 <primary sortas="b-uuidd">uuidd</primary>
1221 </indexterm>
1222 </listitem>
1223 </varlistentry>
1224
1225 <varlistentry id="uuidgen">
1226 <term><command>uuidgen</command></term>
1227 <listitem>
1228 <para>Creates new UUIDs. Each new UUID is a random number likely to be
1229 unique among all UUIDs created, on the local system and on other
1230 systems, in the past and in the future, with extremely high
1231 probability (~340 trillion trillion trillion unique UUIDs are possible)</para>
1232 <indexterm zone="ch-system-util-linux uuidgen">
1233 <primary sortas="b-uuidgen">uuidgen</primary>
1234 </indexterm>
1235 </listitem>
1236 </varlistentry>
1237
1238 <varlistentry id="uuidparse">
1239 <term><command>uuidparse</command></term>
1240 <listitem>
1241 <para>A utility to parse unique identifiers</para>
1242 <indexterm zone="ch-system-util-linux uuidparse">
1243 <primary sortas="b-uuidparse">uuidparse</primary>
1244 </indexterm>
1245 </listitem>
1246 </varlistentry>
1247
1248 <varlistentry id="wall">
1249 <term><command>wall</command></term>
1250 <listitem>
1251 <para>Displays the contents of a file or, by default, its standard
1252 input, on the terminals of all currently logged in users</para>
1253 <indexterm zone="ch-system-util-linux wall">
1254 <primary sortas="b-wall">wall</primary>
1255 </indexterm>
1256 </listitem>
1257 </varlistentry>
1258
1259 <varlistentry id="wdctl">
1260 <term><command>wdctl</command></term>
1261 <listitem>
1262 <para>Shows hardware watchdog status</para>
1263 <indexterm zone="ch-system-util-linux wdctl">
1264 <primary sortas="b-wdctl">wdctl</primary>
1265 </indexterm>
1266 </listitem>
1267 </varlistentry>
1268
1269 <varlistentry id="whereis">
1270 <term><command>whereis</command></term>
1271 <listitem>
1272 <para>Reports the location of the binary, source, and man page
1273 files for the given command</para>
1274 <indexterm zone="ch-system-util-linux whereis">
1275 <primary sortas="b-whereis">whereis</primary>
1276 </indexterm>
1277 </listitem>
1278 </varlistentry>
1279
1280 <varlistentry id="wipefs">
1281 <term><command>wipefs</command></term>
1282 <listitem>
1283 <para>Wipes a filesystem signature from a device</para>
1284 <indexterm zone="ch-system-util-linux wipefs">
1285 <primary sortas="b-wipefs">wipefs</primary>
1286 </indexterm>
1287 </listitem>
1288 </varlistentry>
1289
1290 <varlistentry id="zramctl">
1291 <term><command>zramctl</command></term>
1292 <listitem>
1293 <para>A program to set up and control zram (compressed ram disk)
1294 devices</para>
1295 <indexterm zone="ch-system-util-linux zramctl">
1296 <primary sortas="b-zramctl">zramctl</primary>
1297 </indexterm>
1298 </listitem>
1299 </varlistentry>
1300
1301 <varlistentry id="libblkid">
1302 <term><filename class="libraryfile">libblkid</filename></term>
1303 <listitem>
1304 <para>Contains routines for device identification and token
1305 extraction</para>
1306 <indexterm zone="ch-system-util-linux libblkid">
1307 <primary sortas="c-libblkid">libblkid</primary>
1308 </indexterm>
1309 </listitem>
1310 </varlistentry>
1311
1312 <varlistentry id="libfdisk">
1313 <term><filename class="libraryfile">libfdisk</filename></term>
1314 <listitem>
1315 <para>Contains routines for manipulating partition tables</para>
1316 <indexterm zone="ch-system-util-linux libfdisk">
1317 <primary sortas="c-libfdisk">libfdisk</primary>
1318 </indexterm>
1319 </listitem>
1320 </varlistentry>
1321
1322 <varlistentry id="libmount">
1323 <term><filename class="libraryfile">libmount</filename></term>
1324 <listitem>
1325 <para>Contains routines for block device mounting and
1326 unmounting</para>
1327 <indexterm zone="ch-system-util-linux libmount">
1328 <primary sortas="c-libmount">libmount</primary>
1329 </indexterm>
1330 </listitem>
1331 </varlistentry>
1332
1333 <varlistentry id="libsmartcols">
1334 <term><filename class="libraryfile">libsmartcols</filename></term>
1335 <listitem>
1336 <para>Contains routines for aiding screen output in tabular form</para>
1337 <indexterm zone="ch-system-util-linux libsmartcols">
1338 <primary sortas="c-libsmartcols">libsmartcols</primary>
1339 </indexterm>
1340 </listitem>
1341 </varlistentry>
1342
1343 <varlistentry id="libuuid">
1344 <term><filename class="libraryfile">libuuid</filename></term>
1345 <listitem>
1346 <para>Contains routines for generating unique identifiers for objects
1347 that may be accessible beyond the local system</para>
1348 <indexterm zone="ch-system-util-linux libuuid">
1349 <primary sortas="c-libuuid">libuuid</primary>
1350 </indexterm>
1351 </listitem>
1352 </varlistentry>
1353
1354 </variablelist>
1355
1356 </sect2>
1357
1358</sect1>
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