source: chapter08/util-linux.xml@ 583156ac

11.3 11.3-rc1 12.0 12.0-rc1 12.1 12.1-rc1 bdubbs/gcc13 multilib renodr/libudev-from-systemd trunk xry111/arm64 xry111/arm64-12.0 xry111/clfs-ng xry111/loongarch xry111/loongarch-12.0 xry111/loongarch-12.1 xry111/mips64el xry111/update-glibc
Last change on this file since 583156ac was 9bb4939, checked in by David Bryant <davidbryant@…>, 17 months ago

Patched clumsy verbiage. Added two items (hardlink, lsfd) to the list
of installed programs. Added (link to setarch) to the five items that
link to setarch. Corrected erroneous description of swapoff. Clarified
some of the "short descriptions". Changed the imperative mood to the
indicative mood, and added an "s" to a couple of possessive nouns.

  • Property mode set to 100644
File size: 47.5 KB
Line 
1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4 <!ENTITY % general-entities SYSTEM "../general.ent">
5 %general-entities;
6]>
7
8<sect1 id="ch-system-util-linux" role="wrap">
9 <?dbhtml filename="util-linux.html"?>
10
11 <sect1info condition="script">
12 <productname>util-linux</productname>
13 <productnumber>&util-linux-version;</productnumber>
14 <address>&util-linux-url;</address>
15 </sect1info>
16
17 <title>Util-linux-&util-linux-version;</title>
18
19 <indexterm zone="ch-system-util-linux">
20 <primary sortas="a-Util-linux">Util-linux</primary>
21 </indexterm>
22
23 <sect2 role="package">
24 <title/>
25
26 <para>The Util-linux package contains miscellaneous utility programs.
27 Among them are utilities for handling file systems, consoles, partitions,
28 and messages.</para>
29
30 <segmentedlist>
31 <segtitle>&buildtime;</segtitle>
32 <segtitle>&diskspace;</segtitle>
33
34 <seglistitem>
35 <seg>&util-linux-fin-sbu;</seg>
36 <seg>&util-linux-fin-du;</seg>
37 </seglistitem>
38 </segmentedlist>
39
40 </sect2>
41
42 <sect2 role="installation">
43 <title>Installation of Util-linux</title>
44
45 <para>Prepare Util-linux for compilation:</para>
46
47<screen revision="sysv"><userinput remap="configure">./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
48 --bindir=/usr/bin \
49 --libdir=/usr/lib \
50 --sbindir=/usr/sbin \
51 --disable-chfn-chsh \
52 --disable-login \
53 --disable-nologin \
54 --disable-su \
55 --disable-setpriv \
56 --disable-runuser \
57 --disable-pylibmount \
58 --disable-static \
59 --without-python \
60 --without-systemd \
61 --without-systemdsystemunitdir \
62 --docdir=/usr/share/doc/util-linux-&util-linux-version;</userinput></screen>
63
64<screen revision="systemd"><userinput remap="configure">./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
65 --bindir=/usr/bin \
66 --libdir=/usr/lib \
67 --sbindir=/usr/sbin \
68 --disable-chfn-chsh \
69 --disable-login \
70 --disable-nologin \
71 --disable-su \
72 --disable-setpriv \
73 --disable-runuser \
74 --disable-pylibmount \
75 --disable-static \
76 --without-python \
77 --docdir=/usr/share/doc/util-linux-&util-linux-version;</userinput></screen>
78
79 <para>The --disable and --without options prevent warnings about
80 building components that either require packages not in LFS, or are
81 inconsistent with programs installed by other packages.</para>
82
83 <para>Compile the package:</para>
84
85<screen><userinput remap="make">make</userinput></screen>
86
87 <para>If desired, run the test suite as a non-&root; user:</para>
88
89 <warning><para>Running the test suite as the
90 <systemitem class="username">root</systemitem> user can be harmful to
91 your system. To run it, the CONFIG_SCSI_DEBUG option for the kernel must
92 be available in the currently running system and must be built as a
93 module. Building it into the kernel will prevent booting. For complete
94 coverage, other BLFS packages must be installed. If desired, this test can
95 be run by booting into the completed LFS system and running:</para>
96
97<screen role="nodump"><userinput>bash tests/run.sh --srcdir=$PWD --builddir=$PWD</userinput></screen>
98 </warning>
99
100<screen><userinput remap="test">chown -Rv tester .
101su tester -c "make -k check"</userinput></screen>
102
103 <para>The <emphasis>hardlink</emphasis> tests will fail if the host's kernel
104 does not have the option CONFIG_CRYPTO_USER_API_HASH set.</para>
105
106 <para>Install the package:</para>
107
108<screen><userinput remap="install">make install</userinput></screen>
109<!--
110 <para>Finally, install the man pages:</para>
111
112<screen><userinput remap="install">tar -xf ../util-linux-man-pages-&util-linux-version;.tar.xz - -directory /usr/share/man - -strip-components=1</userinput></screen>
113-->
114 </sect2>
115
116 <sect2 id="contents-utillinux" role="content">
117 <title>Contents of Util-linux</title>
118
119 <segmentedlist>
120 <segtitle>Installed programs</segtitle>
121 <segtitle>Installed libraries</segtitle>
122 <segtitle>Installed directories</segtitle>
123
124 <seglistitem>
125 <seg>addpart, agetty, blkdiscard, blkid, blkzone, blockdev, cal, cfdisk, chcpu,
126 chmem, choom, chrt, col, colcrt, colrm, column, ctrlaltdel, delpart, dmesg,
127 eject, fallocate, fdisk, fincore, findfs, findmnt, flock, fsck,
128 fsck.cramfs, fsck.minix, fsfreeze, fstrim, getopt, hardlink, hexdump, hwclock,
129 i386 (link to setarch), ionice, ipcmk, ipcrm, ipcs, irqtop, isosize, kill, last,
130 lastb (link to last), ldattach, linux32 (link to setarch), linux64 (link to setarch),
131 logger, look, losetup, lsblk, lscpu, lsipc, lsirq, lsfd, lslocks, lslogins,
132 lsmem, lsns, mcookie, mesg, mkfs, mkfs.bfs, mkfs.cramfs, mkfs.minix, mkswap,
133 more, mount, mountpoint, namei, nsenter, partx, pivot_root, prlimit,
134 readprofile, rename, renice, resizepart, rev, rfkill, rtcwake, script,
135 scriptlive, scriptreplay, setarch, setsid, setterm, sfdisk, sulogin, swaplabel,
136 swapoff, swapon, switch_root, taskset, uclampset, ul,
137 umount, uname26 (link to setarch), unshare, utmpdump, uuidd, uuidgen, uuidparse,
138 wall, wdctl, whereis, wipefs, x86_64 (link to setarch), and zramctl</seg>
139 <seg>libblkid.so, libfdisk.so, libmount.so,
140 libsmartcols.so, and libuuid.so</seg>
141 <seg>/usr/include/blkid,
142 /usr/include/libfdisk,
143 /usr/include/libmount,
144 /usr/include/libsmartcols,
145 /usr/include/uuid,
146 /usr/share/doc/util-linux-&util-linux-version;,
147 and /var/lib/hwclock</seg>
148 </seglistitem>
149 </segmentedlist>
150
151 <variablelist>
152 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
153 <?dbfo list-presentation="list"?>
154 <?dbhtml list-presentation="table"?>
155
156 <varlistentry id="addpart">
157 <term><command>addpart</command></term>
158 <listitem>
159 <para>Informs the Linux kernel of new partitions</para>
160 <indexterm zone="ch-system-util-linux addpart">
161 <primary sortas="b-addpart">addpart</primary>
162 </indexterm>
163 </listitem>
164 </varlistentry>
165
166 <varlistentry id="agetty">
167 <term><command>agetty</command></term>
168 <listitem>
169 <para>Opens a tty port, prompts for a login name,
170 and then invokes the <command>login</command> program</para>
171 <indexterm zone="ch-system-util-linux agetty">
172 <primary sortas="b-agetty">agetty</primary>
173 </indexterm>
174 </listitem>
175 </varlistentry>
176
177 <varlistentry id="blkdiscard">
178 <term><command>blkdiscard</command></term>
179 <listitem>
180 <para>Discards sectors on a device</para>
181 <indexterm zone="ch-system-util-linux blkdiscard">
182 <primary sortas="b-blkdiscard">blkdiscard</primary>
183 </indexterm>
184 </listitem>
185 </varlistentry>
186
187 <varlistentry id="blkid">
188 <term><command>blkid</command></term>
189 <listitem>
190 <para>A command line utility to locate and print block device
191 attributes</para>
192 <indexterm zone="ch-system-util-linux blkid">
193 <primary sortas="b-blkid">blkid</primary>
194 </indexterm>
195 </listitem>
196 </varlistentry>
197
198 <varlistentry id="blkzone">
199 <term><command>blkzone</command></term>
200 <listitem>
201 <para>Is used to manage zoned storage block devices</para>
202 <indexterm zone="ch-system-util-linux blkzone">
203 <primary sortas="b-blkzone">blkzone</primary>
204 </indexterm>
205 </listitem>
206 </varlistentry>
207
208 <varlistentry id="blockdev">
209 <term><command>blockdev</command></term>
210 <listitem>
211 <para>Allows users to call block device ioctls from the command
212 line</para>
213 <indexterm zone="ch-system-util-linux blockdev">
214 <primary sortas="b-blockdev">blockdev</primary>
215 </indexterm>
216 </listitem>
217 </varlistentry>
218
219 <varlistentry id="cal">
220 <term><command>cal</command></term>
221 <listitem>
222 <para>Displays a simple calendar</para>
223 <indexterm zone="ch-system-util-linux cal">
224 <primary sortas="b-cal">cal</primary>
225 </indexterm>
226 </listitem>
227 </varlistentry>
228
229 <varlistentry id="cfdisk">
230 <term><command>cfdisk</command></term>
231 <listitem>
232 <para>Manipulates the partition table of the given device</para>
233 <indexterm zone="ch-system-util-linux cfdisk">
234 <primary sortas="b-cfdisk">cfdisk</primary>
235 </indexterm>
236 </listitem>
237 </varlistentry>
238
239 <varlistentry id="chcpu">
240 <term><command>chcpu</command></term>
241 <listitem>
242 <para>Modifies the state of CPUs</para>
243 <indexterm zone="ch-system-util-linux chcpu">
244 <primary sortas="b-chcpu">chcpu</primary>
245 </indexterm>
246 </listitem>
247 </varlistentry>
248
249 <varlistentry id="chmem">
250 <term><command>chmem</command></term>
251 <listitem>
252 <para>Configures memory</para>
253 <indexterm zone="ch-system-util-linux chmem">
254 <primary sortas="b-chmem">chmem</primary>
255 </indexterm>
256 </listitem>
257 </varlistentry>
258
259 <varlistentry id="choom">
260 <term><command>choom</command></term>
261 <listitem>
262 <para>Displays and adjusts OOM-killer scores, used to determine
263 which process to kill first when Linux is Out Of Memory</para>
264 <indexterm zone="ch-system-util-linux choom">
265 <primary sortas="b-choom">choom</primary>
266 </indexterm>
267 </listitem>
268 </varlistentry>
269
270 <varlistentry id="chrt">
271 <term><command>chrt</command></term>
272 <listitem>
273 <para>Manipulates real-time attributes of a process</para>
274 <indexterm zone="ch-system-util-linux chrt">
275 <primary sortas="b-chrt">chrt</primary>
276 </indexterm>
277 </listitem>
278 </varlistentry>
279
280 <varlistentry id="col">
281 <term><command>col</command></term>
282 <listitem>
283 <para>Filters out reverse line feeds</para>
284 <indexterm zone="ch-system-util-linux col">
285 <primary sortas="b-col">col</primary>
286 </indexterm>
287 </listitem>
288 </varlistentry>
289
290 <varlistentry id="colcrt">
291 <term><command>colcrt</command></term>
292 <listitem>
293 <para>Filters <command>nroff</command> output for terminals
294 that lack some capabilities, such as overstriking and half-lines</para>
295 <indexterm zone="ch-system-util-linux colcrt">
296 <primary sortas="b-colcrt">colcrt</primary>
297 </indexterm>
298 </listitem>
299 </varlistentry>
300
301 <varlistentry id="colrm">
302 <term><command>colrm</command></term>
303 <listitem>
304 <para>Filters out the given columns</para>
305 <indexterm zone="ch-system-util-linux colrm">
306 <primary sortas="b-colrm">colrm</primary>
307 </indexterm>
308 </listitem>
309 </varlistentry>
310
311 <varlistentry id="column">
312 <term><command>column</command></term>
313 <listitem>
314 <para>Formats a given file into multiple columns</para>
315 <indexterm zone="ch-system-util-linux column">
316 <primary sortas="b-column">column</primary>
317 </indexterm>
318 </listitem>
319 </varlistentry>
320
321 <varlistentry id="ctrlaltdel">
322 <term><command>ctrlaltdel</command></term>
323 <listitem>
324 <para>Sets the function of the Ctrl+Alt+Del key combination to a
325 hard or a soft reset</para>
326 <indexterm zone="ch-system-util-linux ctrlaltdel">
327 <primary sortas="b-ctrlaltdel">ctrlaltdel</primary>
328 </indexterm>
329 </listitem>
330 </varlistentry>
331
332 <varlistentry id="delpart">
333 <term><command>delpart</command></term>
334 <listitem>
335 <para>Asks the Linux kernel to remove a partition</para>
336 <indexterm zone="ch-system-util-linux delpart">
337 <primary sortas="b-delpart">delpart</primary>
338 </indexterm>
339 </listitem>
340 </varlistentry>
341
342 <varlistentry id="dmesg">
343 <term><command>dmesg</command></term>
344 <listitem>
345 <para>Dumps the kernel boot messages</para>
346 <indexterm zone="ch-system-util-linux dmesg">
347 <primary sortas="b-dmesg">dmesg</primary>
348 </indexterm>
349 </listitem>
350 </varlistentry>
351
352 <varlistentry id="eject">
353 <term><command>eject</command></term>
354 <listitem>
355 <para>Ejects removable media</para>
356 <indexterm zone="ch-system-util-linux eject">
357 <primary sortas="b-eject">eject</primary>
358 </indexterm>
359 </listitem>
360 </varlistentry>
361
362 <varlistentry id="fallocate">
363 <term><command>fallocate</command></term>
364 <listitem>
365 <para>Preallocates space to a file</para>
366 <indexterm zone="ch-system-util-linux fallocate">
367 <primary sortas="b-fallocate">fallocate</primary>
368 </indexterm>
369 </listitem>
370 </varlistentry>
371
372 <varlistentry id="fdisk">
373 <term><command>fdisk</command></term>
374 <listitem>
375 <para>Manipulates the partition table of the given device</para>
376 <indexterm zone="ch-system-util-linux fdisk">
377 <primary sortas="b-fdisk">fdisk</primary>
378 </indexterm>
379 </listitem>
380 </varlistentry>
381
382 <varlistentry id="fincore">
383 <term><command>fincore</command></term>
384 <listitem>
385 <para>Counts pages of file contents in core</para>
386 <indexterm zone="ch-system-util-linux fincore">
387 <primary sortas="b-fincore">fincore</primary>
388 </indexterm>
389 </listitem>
390 </varlistentry>
391
392 <varlistentry id="findfs">
393 <term><command>findfs</command></term>
394 <listitem>
395 <para>Finds a file system, either by label or Universally Unique Identifier
396 (UUID)</para>
397 <indexterm zone="ch-system-util-linux findfs">
398 <primary sortas="b-findfs">findfs</primary>
399 </indexterm>
400 </listitem>
401 </varlistentry>
402
403 <varlistentry id="findmnt">
404 <term><command>findmnt</command></term>
405 <listitem>
406 <para>Is a command line interface to the libmount library
407 for working with mountinfo, fstab and mtab files</para>
408 <indexterm zone="ch-system-util-linux findmnt">
409 <primary sortas="b-findmnt">findmnt</primary>
410 </indexterm>
411 </listitem>
412 </varlistentry>
413
414 <varlistentry id="flock">
415 <term><command>flock</command></term>
416 <listitem>
417 <para>Acquires a file lock and then executes a command with the lock
418 held</para>
419 <indexterm zone="ch-system-util-linux flock">
420 <primary sortas="b-flock">flock</primary>
421 </indexterm>
422 </listitem>
423 </varlistentry>
424
425 <varlistentry id="fsck">
426 <term><command>fsck</command></term>
427 <listitem>
428 <para>Is used to check, and optionally repair, file systems</para>
429 <indexterm zone="ch-system-util-linux fsck">
430 <primary sortas="b-fsck">fsck</primary>
431 </indexterm>
432 </listitem>
433 </varlistentry>
434
435 <varlistentry id="fsck.cramfs">
436 <term><command>fsck.cramfs</command></term>
437 <listitem>
438 <para>Performs a consistency check on the Cramfs file system on the
439 given device</para>
440 <indexterm zone="ch-system-util-linux fsck.cramfs">
441 <primary sortas="b-fsck.cramfs">fsck.cramfs</primary>
442 </indexterm>
443 </listitem>
444 </varlistentry>
445
446 <varlistentry id="fsck.minix">
447 <term><command>fsck.minix</command></term>
448 <listitem>
449 <para>Performs a consistency check on the Minix file system on the
450 given device</para>
451 <indexterm zone="ch-system-util-linux fsck.minix">
452 <primary sortas="b-fsck.minix">fsck.minix</primary>
453 </indexterm>
454 </listitem>
455 </varlistentry>
456
457 <varlistentry id="fsfreeze">
458 <term><command>fsfreeze</command></term>
459 <listitem>
460 <para>Is a very simple wrapper around FIFREEZE/FITHAW ioctl
461 kernel driver operations</para>
462 <indexterm zone="ch-system-util-linux fsfreeze">
463 <primary sortas="b-fsfreeze">fsfreeze</primary>
464 </indexterm>
465 </listitem>
466 </varlistentry>
467
468 <varlistentry id="fstrim">
469 <term><command>fstrim</command></term>
470 <listitem>
471 <para>Discards unused blocks on a mounted filesystem</para>
472 <indexterm zone="ch-system-util-linux fstrim">
473 <primary sortas="b-fstrim">fstrim</primary>
474 </indexterm>
475 </listitem>
476 </varlistentry>
477
478 <varlistentry id="getopt">
479 <term><command>getopt</command></term>
480 <listitem>
481 <para>Parses options in the given command line</para>
482 <indexterm zone="ch-system-util-linux getopt">
483 <primary sortas="b-getopt">getopt</primary>
484 </indexterm>
485 </listitem>
486 </varlistentry>
487
488 <varlistentry id="hardlink">
489 <term><command>hardlink</command></term>
490 <listitem>
491 <para>Consolidates duplicate files by creating hard links</para>
492 <indexterm zone="ch-system-util-linux hardlink">
493 <primary sortas="b-hardlink">hardlink</primary>
494 </indexterm>
495 </listitem>
496 </varlistentry>
497
498 <varlistentry id="hexdump">
499 <term><command>hexdump</command></term>
500 <listitem>
501 <para>Dumps the given file in hexadecimal, decimal, octal,
502 or ascii</para>
503 <indexterm zone="ch-system-util-linux hexdump">
504 <primary sortas="b-hexdump">hexdump</primary>
505 </indexterm>
506 </listitem>
507 </varlistentry>
508
509 <varlistentry id="hwclock">
510 <term><command>hwclock</command></term>
511 <listitem>
512 <para>Reads or sets the system's hardware clock, also called
513 the Real-Time Clock (RTC) or Basic Input-Output System (BIOS)
514 clock</para>
515 <indexterm zone="ch-system-util-linux hwclock">
516 <primary sortas="b-hwclock">hwclock</primary>
517 </indexterm>
518 </listitem>
519 </varlistentry>
520
521 <varlistentry id="i386">
522 <term><command>i386</command></term>
523 <listitem>
524 <para>A symbolic link to setarch</para>
525 <indexterm zone="ch-system-util-linux i386">
526 <primary sortas="b-i386">i386</primary>
527 </indexterm>
528 </listitem>
529 </varlistentry>
530
531 <varlistentry id="ionice">
532 <term><command>ionice</command></term>
533 <listitem>
534 <para>Gets or sets the io scheduling class and priority for a program</para>
535 <indexterm zone="ch-system-util-linux ionice">
536 <primary sortas="b-ionice">ionice</primary>
537 </indexterm>
538 </listitem>
539 </varlistentry>
540
541 <varlistentry id="ipcmk">
542 <term><command>ipcmk</command></term>
543 <listitem>
544 <para>Creates various IPC resources</para>
545 <indexterm zone="ch-system-util-linux ipcmk">
546 <primary sortas="b-ipcmk">ipcmk</primary>
547 </indexterm>
548 </listitem>
549 </varlistentry>
550
551 <varlistentry id="ipcrm">
552 <term><command>ipcrm</command></term>
553 <listitem>
554 <para>Removes the given Inter-Process Communication (IPC) resource</para>
555 <indexterm zone="ch-system-util-linux ipcrm">
556 <primary sortas="b-ipcrm">ipcrm</primary>
557 </indexterm>
558 </listitem>
559 </varlistentry>
560
561 <varlistentry id="ipcs">
562 <term><command>ipcs</command></term>
563 <listitem>
564 <para>Provides IPC status information</para>
565 <indexterm zone="ch-system-util-linux ipcs">
566 <primary sortas="b-ipcs">ipcs</primary>
567 </indexterm>
568 </listitem>
569 </varlistentry>
570
571 <varlistentry id="irqtop">
572 <term><command>irqtop</command></term>
573 <listitem>
574 <para>Displays kernel interrupt counter information in
575 <filename>top(1)</filename> style view</para>
576 <indexterm zone="ch-system-util-linux irqtop">
577 <primary sortas="b-irqtop">irqtop</primary>
578 </indexterm>
579 </listitem>
580 </varlistentry>
581
582 <varlistentry id="isosize">
583 <term><command>isosize</command></term>
584 <listitem>
585 <para>Reports the size of an iso9660 file system</para>
586 <indexterm zone="ch-system-util-linux isosize">
587 <primary sortas="b-isosize">isosize</primary>
588 </indexterm>
589 </listitem>
590 </varlistentry>
591
592 <varlistentry id="kill">
593 <term><command>kill</command></term>
594 <listitem>
595 <para>Sends signals to processes</para>
596 <indexterm zone="ch-system-util-linux kill">
597 <primary sortas="b-kill">kill</primary>
598 </indexterm>
599 </listitem>
600 </varlistentry>
601
602 <varlistentry id="last">
603 <term><command>last</command></term>
604 <listitem>
605 <para>Shows which users last logged in (and out), searching back
606 through the <filename>/var/log/wtmp</filename> file; it also shows
607 system boots, shutdowns, and run-level changes</para>
608 <indexterm zone="ch-system-util-linux last">
609 <primary sortas="b-last">last</primary>
610 </indexterm>
611 </listitem>
612 </varlistentry>
613
614 <varlistentry id="lastb">
615 <term><command>lastb</command></term>
616 <listitem>
617 <para>Shows the failed login attempts, as logged in
618 <filename>/var/log/btmp</filename></para>
619 <indexterm zone="ch-system-util-linux lastb">
620 <primary sortas="b-lastb">lastb</primary>
621 </indexterm>
622 </listitem>
623 </varlistentry>
624
625 <varlistentry id="ldattach">
626 <term><command>ldattach</command></term>
627 <listitem>
628 <para>Attaches a line discipline to a serial line</para>
629 <indexterm zone="ch-system-util-linux ldattach">
630 <primary sortas="b-ldattach">ldattach</primary>
631 </indexterm>
632 </listitem>
633 </varlistentry>
634
635 <varlistentry id="linux32">
636 <term><command>linux32</command></term>
637 <listitem>
638 <para>A symbolic link to setarch</para>
639 <indexterm zone="ch-system-util-linux linux32">
640 <primary sortas="b-linux32">linux32</primary>
641 </indexterm>
642 </listitem>
643 </varlistentry>
644
645 <varlistentry id="linux64">
646 <term><command>linux64</command></term>
647 <listitem>
648 <para>A symbolic link to setarch</para>
649 <indexterm zone="ch-system-util-linux linux64">
650 <primary sortas="b-linux64">linux64</primary>
651 </indexterm>
652 </listitem>
653 </varlistentry>
654
655 <varlistentry id="logger">
656 <term><command>logger</command></term>
657 <listitem>
658 <para>Enters the given message into the system log</para>
659 <indexterm zone="ch-system-util-linux logger">
660 <primary sortas="b-logger">logger</primary>
661 </indexterm>
662 </listitem>
663 </varlistentry>
664
665 <varlistentry id="look">
666 <term><command>look</command></term>
667 <listitem>
668 <para>Displays lines that begin with the given string</para>
669 <indexterm zone="ch-system-util-linux look">
670 <primary sortas="b-look">look</primary>
671 </indexterm>
672 </listitem>
673 </varlistentry>
674
675 <varlistentry id="losetup">
676 <term><command>losetup</command></term>
677 <listitem>
678 <para>Sets up and controls loop devices</para>
679 <indexterm zone="ch-system-util-linux losetup">
680 <primary sortas="b-losetup">losetup</primary>
681 </indexterm>
682 </listitem>
683 </varlistentry>
684
685 <varlistentry id="lsblk">
686 <term><command>lsblk</command></term>
687 <listitem>
688 <para>Lists information about all or selected block devices in
689 a tree-like format</para>
690 <indexterm zone="ch-system-util-linux lsblk">
691 <primary sortas="b-lsblk">lsblk</primary>
692 </indexterm>
693 </listitem>
694 </varlistentry>
695
696 <varlistentry id="lscpu">
697 <term><command>lscpu</command></term>
698 <listitem>
699 <para>Prints CPU architecture information</para>
700 <indexterm zone="ch-system-util-linux lscpu">
701 <primary sortas="b-lscpu">lscpu</primary>
702 </indexterm>
703 </listitem>
704 </varlistentry>
705
706 <varlistentry id="lsfd">
707 <term><command>lsfd</command></term>
708 <listitem>
709 <para>Displays information about open files; replaces <command>lsof</command></para>
710 <indexterm zone="ch-system-util-linux lsfd">
711 <primary sortas="b-lsfd">lsfd</primary>
712 </indexterm>
713 </listitem>
714 </varlistentry>
715
716 <varlistentry id="lsipc">
717 <term><command>lsipc</command></term>
718 <listitem>
719 <para>Prints information on IPC facilities currently employed
720 in the system</para>
721 <indexterm zone="ch-system-util-linux lsipc">
722 <primary sortas="b-lsipc">lsipc</primary>
723 </indexterm>
724 </listitem>
725 </varlistentry>
726
727 <varlistentry id="lsirq">
728 <term><command>lsirq</command></term>
729 <listitem>
730 <para>Displays kernel interrupt counter information</para>
731 <indexterm zone="ch-system-util-linux lsirq">
732 <primary sortas="b-lsirq">lsirq</primary>
733 </indexterm>
734 </listitem>
735 </varlistentry>
736
737 <varlistentry id="lslocks">
738 <term><command>lslocks</command></term>
739 <listitem>
740 <para>Lists local system locks</para>
741 <indexterm zone="ch-system-util-linux lslocks">
742 <primary sortas="b-lslocks">lslocks</primary>
743 </indexterm>
744 </listitem>
745 </varlistentry>
746
747 <varlistentry id="lslogins">
748 <term><command>lslogins</command></term>
749 <listitem>
750 <para>Lists information about users, groups and system accounts</para>
751 <indexterm zone="ch-system-util-linux lslogins">
752 <primary sortas="b-lslogins">lslogins</primary>
753 </indexterm>
754 </listitem>
755 </varlistentry>
756
757 <varlistentry id="lsmem">
758 <term><command>lsmem</command></term>
759 <listitem>
760 <para>Lists the ranges of available memory with their online
761 status</para>
762 <indexterm zone="ch-system-util-linux lsmem">
763 <primary sortas="b-lsmem">lsmem</primary>
764 </indexterm>
765 </listitem>
766 </varlistentry>
767
768 <varlistentry id="lsns">
769 <term><command>lsns</command></term>
770 <listitem>
771 <para>Lists namespaces</para>
772 <indexterm zone="ch-system-util-linux lsns">
773 <primary sortas="b-lsns">lsns</primary>
774 </indexterm>
775 </listitem>
776 </varlistentry>
777
778 <varlistentry id="mcookie">
779 <term><command>mcookie</command></term>
780 <listitem>
781 <para>Generates magic cookies (128-bit random hexadecimal numbers) for
782 <command>xauth</command></para>
783 <indexterm zone="ch-system-util-linux mcookie">
784 <primary sortas="b-mcookie">mcookie</primary>
785 </indexterm>
786 </listitem>
787 </varlistentry>
788
789 <varlistentry id="mesg">
790 <term><command>mesg</command></term>
791 <listitem>
792 <para>Controls whether other users can send messages to the current
793 user's terminal</para>
794 <indexterm zone="ch-system-util-linux mesg">
795 <primary sortas="b-mesg">mesg</primary>
796 </indexterm>
797 </listitem>
798 </varlistentry>
799
800 <varlistentry id="mkfs">
801 <term><command>mkfs</command></term>
802 <listitem>
803 <para>Builds a file system on a device (usually a hard disk
804 partition)</para>
805 <indexterm zone="ch-system-util-linux mkfs">
806 <primary sortas="b-mkfs">mkfs</primary>
807 </indexterm>
808 </listitem>
809 </varlistentry>
810
811 <varlistentry id="mkfs.bfs">
812 <term><command>mkfs.bfs</command></term>
813 <listitem>
814 <para>Creates a Santa Cruz Operations (SCO) bfs file system</para>
815 <indexterm zone="ch-system-util-linux mkfs.bfs">
816 <primary sortas="b-mkfs.bfs">mkfs.bfs</primary>
817 </indexterm>
818 </listitem>
819 </varlistentry>
820
821 <varlistentry id="mkfs.cramfs">
822 <term><command>mkfs.cramfs</command></term>
823 <listitem>
824 <para>Creates a cramfs file system</para>
825 <indexterm zone="ch-system-util-linux mkfs.cramfs">
826 <primary sortas="b-mkfs.cramfs">mkfs.cramfs</primary>
827 </indexterm>
828 </listitem>
829 </varlistentry>
830
831 <varlistentry id="mkfs.minix">
832 <term><command>mkfs.minix</command></term>
833 <listitem>
834 <para>Creates a Minix file system</para>
835 <indexterm zone="ch-system-util-linux mkfs.minix">
836 <primary sortas="b-mkfs.minix">mkfs.minix</primary>
837 </indexterm>
838 </listitem>
839 </varlistentry>
840
841 <varlistentry id="mkswap">
842 <term><command>mkswap</command></term>
843 <listitem>
844 <para>Initializes the given device or file to be used as a swap
845 area</para>
846 <indexterm zone="ch-system-util-linux mkswap">
847 <primary sortas="b-mkswap">mkswap</primary>
848 </indexterm>
849 </listitem>
850 </varlistentry>
851
852 <varlistentry id="more">
853 <term><command>more</command></term>
854 <listitem>
855 <para>A filter for paging through text one screen at a time</para>
856 <indexterm zone="ch-system-util-linux more">
857 <primary sortas="b-more">more</primary>
858 </indexterm>
859 </listitem>
860 </varlistentry>
861
862 <varlistentry id="mount">
863 <term><command>mount</command></term>
864 <listitem>
865 <para>Attaches the file system on the given device to a specified
866 directory in the file-system tree</para>
867 <indexterm zone="ch-system-util-linux mount">
868 <primary sortas="b-mount">mount</primary>
869 </indexterm>
870 </listitem>
871 </varlistentry>
872
873 <varlistentry id="mountpoint">
874 <term><command>mountpoint</command></term>
875 <listitem>
876 <para>Checks if the directory is a mountpoint</para>
877 <indexterm zone="ch-system-util-linux mountpoint">
878 <primary sortas="b-mountpoint">mountpoint</primary>
879 </indexterm>
880 </listitem>
881 </varlistentry>
882
883 <varlistentry id="namei">
884 <term><command>namei</command></term>
885 <listitem>
886 <para>Shows the symbolic links in the given paths</para>
887 <indexterm zone="ch-system-util-linux namei">
888 <primary sortas="b-namei">namei</primary>
889 </indexterm>
890 </listitem>
891 </varlistentry>
892
893 <varlistentry id="nsenter">
894 <term><command>nsenter</command></term>
895 <listitem>
896 <para>Runs a program with namespaces of other processes</para>
897 <indexterm zone="ch-system-util-linux nsenter">
898 <primary sortas="b-nsenter">nsenter</primary>
899 </indexterm>
900 </listitem>
901 </varlistentry>
902
903 <varlistentry id="partx">
904 <term><command>partx</command></term>
905 <listitem>
906 <para>Tells the kernel about the presence and numbering of on-disk
907 partitions</para>
908 <indexterm zone="ch-system-util-linux partx">
909 <primary sortas="b-partx">partx</primary>
910 </indexterm>
911 </listitem>
912 </varlistentry>
913
914 <varlistentry id="pivot_root">
915 <term><command>pivot_root</command></term>
916 <listitem>
917 <para>Makes the given file system the new root file system of the
918 current process</para>
919 <indexterm zone="ch-system-util-linux pivot_root">
920 <primary sortas="b-pivot_root">pivot_root</primary>
921 </indexterm>
922 </listitem>
923 </varlistentry>
924
925 <varlistentry id="prlimit">
926 <term><command>prlimit</command></term>
927 <listitem>
928 <para>Gets and sets a process's resource limits</para>
929 <indexterm zone="ch-system-util-linux prlimit">
930 <primary sortas="b-prlimit">prlimit</primary>
931 </indexterm>
932 </listitem>
933 </varlistentry>
934
935 <varlistentry id="readprofile">
936 <term><command>readprofile</command></term>
937 <listitem>
938 <para>Reads kernel profiling information</para>
939 <indexterm zone="ch-system-util-linux readprofile">
940 <primary sortas="b-readprofile">readprofile</primary>
941 </indexterm>
942 </listitem>
943 </varlistentry>
944
945 <varlistentry id="rename">
946 <term><command>rename</command></term>
947 <listitem>
948 <para>Renames the given files, replacing a given string with
949 another</para>
950 <indexterm zone="ch-system-util-linux rename">
951 <primary sortas="b-rename">rename</primary>
952 </indexterm>
953 </listitem>
954 </varlistentry>
955
956 <varlistentry id="renice">
957 <term><command>renice</command></term>
958 <listitem>
959 <para>Alters the priority of running processes</para>
960 <indexterm zone="ch-system-util-linux renice">
961 <primary sortas="b-renice">renice</primary>
962 </indexterm>
963 </listitem>
964 </varlistentry>
965
966 <varlistentry id="resizepart">
967 <term><command>resizepart</command></term>
968 <listitem>
969 <para>Asks the Linux kernel to resize a partition</para>
970 <indexterm zone="ch-system-util-linux resizepart">
971 <primary sortas="b-resizepart">resizepart</primary>
972 </indexterm>
973 </listitem>
974 </varlistentry>
975
976 <varlistentry id="rev">
977 <term><command>rev</command></term>
978 <listitem>
979 <para>Reverses the lines of a given file</para>
980 <indexterm zone="ch-system-util-linux rev">
981 <primary sortas="b-rev">rev</primary>
982 </indexterm>
983 </listitem>
984 </varlistentry>
985
986 <varlistentry id="rkfill">
987 <term><command>rkfill</command></term>
988 <listitem>
989 <para>Tool for enabling and disabling wireless devices</para>
990 <indexterm zone="ch-system-util-linux rkfill">
991 <primary sortas="b-rkfill">rkfill</primary>
992 </indexterm>
993 </listitem>
994 </varlistentry>
995
996 <varlistentry id="rtcwake">
997 <term><command>rtcwake</command></term>
998 <listitem>
999 <para>Used to enter a system sleep state until the specified wakeup
1000 time</para>
1001 <indexterm zone="ch-system-util-linux rtcwake">
1002 <primary sortas="b-rtcwake">rtcwake</primary>
1003 </indexterm>
1004 </listitem>
1005 </varlistentry>
1006
1007 <varlistentry id="script">
1008 <term><command>script</command></term>
1009 <listitem>
1010 <para>Makes a typescript of a terminal session</para>
1011 <indexterm zone="ch-system-util-linux script">
1012 <primary sortas="b-script">script</primary>
1013 </indexterm>
1014 </listitem>
1015 </varlistentry>
1016
1017 <varlistentry id="scriptlive">
1018 <term><command>scriptlive</command></term>
1019 <listitem>
1020 <para>Re-runs session typescripts using timing information</para>
1021 <indexterm zone="ch-system-util-linux scriptlive">
1022 <primary sortas="b-scriptlive">scriptlive</primary>
1023 </indexterm>
1024 </listitem>
1025 </varlistentry>
1026
1027 <varlistentry id="scriptreplay">
1028 <term><command>scriptreplay</command></term>
1029 <listitem>
1030 <para>Plays back typescripts using timing information</para>
1031 <indexterm zone="ch-system-util-linux scriptreplay">
1032 <primary sortas="b-scriptreplay">scriptreplay</primary>
1033 </indexterm>
1034 </listitem>
1035 </varlistentry>
1036
1037 <varlistentry id="setarch">
1038 <term><command>setarch</command></term>
1039 <listitem>
1040 <para>Changes reported architecture in a new program environment, and
1041 sets personality flags</para>
1042 <indexterm zone="ch-system-util-linux setarch">
1043 <primary sortas="b-setarch">setarch</primary>
1044 </indexterm>
1045 </listitem>
1046 </varlistentry>
1047
1048 <varlistentry id="setsid">
1049 <term><command>setsid</command></term>
1050 <listitem>
1051 <para>Runs the given program in a new session</para>
1052 <indexterm zone="ch-system-util-linux setsid">
1053 <primary sortas="b-setsid">setsid</primary>
1054 </indexterm>
1055 </listitem>
1056 </varlistentry>
1057
1058 <varlistentry id="setterm">
1059 <term><command>setterm</command></term>
1060 <listitem>
1061 <para>Sets terminal attributes</para>
1062 <indexterm zone="ch-system-util-linux setterm">
1063 <primary sortas="b-setterm">setterm</primary>
1064 </indexterm>
1065 </listitem>
1066 </varlistentry>
1067
1068 <varlistentry id="sfdisk">
1069 <term><command>sfdisk</command></term>
1070 <listitem>
1071 <para>A disk partition table manipulator</para>
1072 <indexterm zone="ch-system-util-linux sfdisk">
1073 <primary sortas="b-sfdisk">sfdisk</primary>
1074 </indexterm>
1075 </listitem>
1076 </varlistentry>
1077
1078 <varlistentry id="sulogin">
1079 <term><command>sulogin</command></term>
1080 <listitem>
1081 <para>Allows <systemitem class="username">root</systemitem> to log in;
1082 it is normally invoked by <command>init</command> when the system goes
1083 into single user mode</para>
1084 <indexterm zone="ch-system-util-linux sulogin">
1085 <primary sortas="b-sulogin">sulogin</primary>
1086 </indexterm>
1087 </listitem>
1088 </varlistentry>
1089
1090 <varlistentry id="swaplabel">
1091 <term><command>swaplabel</command></term>
1092 <listitem>
1093 <para>Makes changes to the swap area's UUID and label</para>
1094 <indexterm zone="ch-system-util-linux swaplabel">
1095 <primary sortas="b-swaplabel">swaplabel</primary>
1096 </indexterm>
1097 </listitem>
1098 </varlistentry>
1099
1100 <varlistentry id="swapoff">
1101 <term><command>swapoff</command></term>
1102 <listitem>
1103 <para>Disables devices and files for paging and swapping</para>
1104 <indexterm zone="ch-system-util-linux swapoff">
1105 <primary sortas="b-swapoff">swapoff</primary>
1106 </indexterm>
1107 </listitem>
1108 </varlistentry>
1109
1110 <varlistentry id="swapon">
1111 <term><command>swapon</command></term>
1112 <listitem>
1113 <para>Enables devices and files for paging and swapping, and
1114 lists the devices and files currently in use</para>
1115 <indexterm zone="ch-system-util-linux swapon">
1116 <primary sortas="b-swapon">swapon</primary>
1117 </indexterm>
1118 </listitem>
1119 </varlistentry>
1120
1121 <varlistentry id="switch_root">
1122 <term><command>switch_root</command></term>
1123 <listitem>
1124 <para>Switches to another filesystem as the root of the mount tree</para>
1125 <indexterm zone="ch-system-util-linux switch_root">
1126 <primary sortas="b-switch_root">switch_root</primary>
1127 </indexterm>
1128 </listitem>
1129 </varlistentry>
1130
1131 <varlistentry id="taskset">
1132 <term><command>taskset</command></term>
1133 <listitem>
1134 <para>Retrieves or sets a process's CPU affinity</para>
1135 <indexterm zone="ch-system-util-linux taskset">
1136 <primary sortas="b-taskset">taskset</primary>
1137 </indexterm>
1138 </listitem>
1139 </varlistentry>
1140
1141 <varlistentry id="uclampset">
1142 <term><command>uclampset</command></term>
1143 <listitem>
1144 <para>Manipulates the utilization clamping attributes of the
1145 system or a process</para>
1146 <indexterm zone="ch-system-util-linux uclampset">
1147 <primary sortas="b-uclampset">uclampset</primary>
1148 </indexterm>
1149 </listitem>
1150 </varlistentry>
1151
1152 <varlistentry id="ul">
1153 <term><command>ul</command></term>
1154 <listitem>
1155 <para>A filter for translating underscores into escape sequences
1156 indicating underlining for the terminal in use</para>
1157 <indexterm zone="ch-system-util-linux ul">
1158 <primary sortas="b-ul">ul</primary>
1159 </indexterm>
1160 </listitem>
1161 </varlistentry>
1162
1163 <varlistentry id="umount">
1164 <term><command>umount</command></term>
1165 <listitem>
1166 <para>Disconnects a file system from the system's file tree</para>
1167 <indexterm zone="ch-system-util-linux umount">
1168 <primary sortas="b-umount">umount</primary>
1169 </indexterm>
1170 </listitem>
1171 </varlistentry>
1172
1173 <varlistentry id="uname26">
1174 <term><command>uname26</command></term>
1175 <listitem>
1176 <para>A symbolic link to setarch</para>
1177 <indexterm zone="ch-system-util-linux uname26">
1178 <primary sortas="b-uname26">uname26</primary>
1179 </indexterm>
1180 </listitem>
1181 </varlistentry>
1182
1183 <varlistentry id="unshare">
1184 <term><command>unshare</command></term>
1185 <listitem>
1186 <para>Runs a program with some namespaces unshared from parent</para>
1187 <indexterm zone="ch-system-util-linux unshare">
1188 <primary sortas="b-unshare">unshare</primary>
1189 </indexterm>
1190 </listitem>
1191 </varlistentry>
1192
1193 <varlistentry id="utmpdump">
1194 <term><command>utmpdump</command></term>
1195 <listitem>
1196 <para>Displays the content of the given login file in a
1197 user-friendly format</para>
1198 <indexterm zone="ch-system-util-linux utmpdump">
1199 <primary sortas="b-utmpdump">utmpdump</primary>
1200 </indexterm>
1201 </listitem>
1202 </varlistentry>
1203
1204 <varlistentry id="uuidd">
1205 <term><command>uuidd</command></term>
1206 <listitem>
1207 <para>A daemon used by the UUID library to generate time-based
1208 UUIDs in a secure and guaranteed-unique fashion</para>
1209 <indexterm zone="ch-system-util-linux uuidd">
1210 <primary sortas="b-uuidd">uuidd</primary>
1211 </indexterm>
1212 </listitem>
1213 </varlistentry>
1214
1215 <varlistentry id="uuidgen">
1216 <term><command>uuidgen</command></term>
1217 <listitem>
1218 <para>Creates new UUIDs. Each new UUID is a random number likely to be
1219 unique among all UUIDs created, on the local system and on other
1220 systems, in the past and in the future, with extremely high
1221 probability (~340 trillion trillion trillion unique UUIDs are possible)</para>
1222 <indexterm zone="ch-system-util-linux uuidgen">
1223 <primary sortas="b-uuidgen">uuidgen</primary>
1224 </indexterm>
1225 </listitem>
1226 </varlistentry>
1227
1228 <varlistentry id="uuidparse">
1229 <term><command>uuidparse</command></term>
1230 <listitem>
1231 <para>A utility to parse unique identifiers</para>
1232 <indexterm zone="ch-system-util-linux uuidparse">
1233 <primary sortas="b-uuidparse">uuidparse</primary>
1234 </indexterm>
1235 </listitem>
1236 </varlistentry>
1237
1238 <varlistentry id="wall">
1239 <term><command>wall</command></term>
1240 <listitem>
1241 <para>Displays the contents of a file or, by default, its standard
1242 input, on the terminals of all currently logged in users</para>
1243 <indexterm zone="ch-system-util-linux wall">
1244 <primary sortas="b-wall">wall</primary>
1245 </indexterm>
1246 </listitem>
1247 </varlistentry>
1248
1249 <varlistentry id="wdctl">
1250 <term><command>wdctl</command></term>
1251 <listitem>
1252 <para>Shows hardware watchdog status</para>
1253 <indexterm zone="ch-system-util-linux wdctl">
1254 <primary sortas="b-wdctl">wdctl</primary>
1255 </indexterm>
1256 </listitem>
1257 </varlistentry>
1258
1259 <varlistentry id="whereis">
1260 <term><command>whereis</command></term>
1261 <listitem>
1262 <para>Reports the location of the binary, source, and man page
1263 files for the given command</para>
1264 <indexterm zone="ch-system-util-linux whereis">
1265 <primary sortas="b-whereis">whereis</primary>
1266 </indexterm>
1267 </listitem>
1268 </varlistentry>
1269
1270 <varlistentry id="wipefs">
1271 <term><command>wipefs</command></term>
1272 <listitem>
1273 <para>Wipes a filesystem signature from a device</para>
1274 <indexterm zone="ch-system-util-linux wipefs">
1275 <primary sortas="b-wipefs">wipefs</primary>
1276 </indexterm>
1277 </listitem>
1278 </varlistentry>
1279
1280 <varlistentry id="x86_64">
1281 <term><command>x86_64</command></term>
1282 <listitem>
1283 <para>A symbolic link to setarch</para>
1284 <indexterm zone="ch-system-util-linux x86_64">
1285 <primary sortas="b-x86_64">x86_64</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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