source: chapter08/util-linux.xml@ 59e0a47

multilib
Last change on this file since 59e0a47 was 59e0a47, checked in by Thomas Trepl <thomas@…>, 2 months ago

Automatic merge of trunk into multilib

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1<?xml version="1.0" encoding="UTF-8"?>
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<!--
46 <para>First, disable a problematic test:</para>
47
48 <screen><userinput remap="pre">sed -i '/test_mkfds/s/^/#/' tests/helpers/Makemodule.am</userinput></screen>
49-->
50 <para>Prepare Util-linux for compilation:</para>
51
52 <screen revision="sysv"><userinput remap="configure">./configure --bindir=/usr/bin \
53 --libdir=/usr/lib \
54 --runstatedir=/run \
55 --sbindir=/usr/sbin \
56 --disable-chfn-chsh \
57 --disable-login \
58 --disable-nologin \
59 --disable-su \
60 --disable-setpriv \
61 --disable-runuser \
62 --disable-pylibmount \
63 --disable-liblastlog2 \
64 --disable-static \
65 --without-python \
66 --without-systemd \
67 --without-systemdsystemunitdir \
68 ADJTIME_PATH=/var/lib/hwclock/adjtime \
69 --docdir=/usr/share/doc/util-linux-&util-linux-version;</userinput></screen>
70
71 <screen revision="systemd"><userinput remap="configure">./configure --bindir=/usr/bin \
72 --libdir=/usr/lib \
73 --runstatedir=/run \
74 --sbindir=/usr/sbin \
75 --disable-chfn-chsh \
76 --disable-login \
77 --disable-nologin \
78 --disable-su \
79 --disable-setpriv \
80 --disable-runuser \
81 --disable-pylibmount \
82 --disable-liblastlog2 \
83 --disable-static \
84 --without-python \
85 ADJTIME_PATH=/var/lib/hwclock/adjtime \
86 --docdir=/usr/share/doc/util-linux-&util-linux-version;</userinput></screen>
87
88 <para>The --disable and --without options prevent warnings about
89 building components that either require packages not in LFS, or are
90 inconsistent with programs installed by other packages.</para>
91
92 <para>Compile the package:</para>
93
94<screen><userinput remap="make">make</userinput></screen>
95
96 <para>If desired, run the test suite as a non-&root; user:</para>
97
98 <warning><para>Running the test suite as the
99 <systemitem class="username">root</systemitem> user can be harmful to
100 your system. To run it, the CONFIG_SCSI_DEBUG option for the kernel must
101 be available in the currently running system and must be built as a
102 module. Building it into the kernel will prevent booting. For complete
103 coverage, other BLFS packages must be installed. If desired, this test can
104 be run by booting into the completed LFS system and running:</para>
105
106<screen role="nodump"><userinput>bash tests/run.sh --srcdir=$PWD --builddir=$PWD</userinput></screen>
107 </warning>
108
109<screen><userinput remap="test">chown -R tester .
110su tester -c "make -k check"</userinput></screen>
111
112 <para>
113 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, the lsfd: inotify test will
119 fail if the kernel option <option>CONFIG_NETLINK_DIAG</option> is not
120 enabled.
121 </para>
122
123 <para>Install the package:</para>
124
125<screen><userinput remap="install">make install</userinput></screen>
126<!--
127 <para>Finally, install the man pages:</para>
128
129<screen><userinput remap="install">tar -xf ../util-linux-man-pages-&util-linux-version;.tar.xz - -directory /usr/share/man - -strip-components=1</userinput></screen>
130-->
131 </sect2>
132
133 <!-- - - - - - - - - - -->
134 <!-- Multilib - 32bit -->
135 <!-- - - - - - - - - - -->
136
137 <sect2 arch="ml_32,ml_all" role="installation">
138 <title>Installation of Util-linux - 32-bit</title>
139
140 <para>Clean previous build:</para>
141
142<screen><userinput remap="pre">make distclean</userinput></screen>
143
144 <para>Move a tool out of the way which is optionally used by
145 configure but will report invalid pathes for multilib builds.</para>
146
147<screen><userinput remap="configure">mv /usr/bin/ncursesw6-config{,.tmp}</userinput></screen>
148
149 <para>Prepare Util-linux for compilation:</para>
150
151<screen revision="sysv"><userinput remap="configure">CC="gcc -m32" \
152./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
153 --host=i686-pc-linux-gnu \
154 --libdir=/usr/lib32 \
155 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
156 --disable-chfn-chsh \
157 --disable-login \
158 --disable-nologin \
159 --disable-su \
160 --disable-setpriv \
161 --disable-runuser \
162 --disable-pylibmount \
163 --disable-static \
164 --without-python \
165 --without-systemd \
166 --without-systemdsystemunitdir</userinput></screen>
167
168<screen revision="systemd"><userinput remap="configure">CC="gcc -m32" \
169./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
170 --host=i686-pc-linux-gnu \
171 --libdir=/usr/lib32 \
172 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
173 --disable-chfn-chsh \
174 --disable-login \
175 --disable-nologin \
176 --disable-su \
177 --disable-setpriv \
178 --disable-runuser \
179 --disable-pylibmount \
180 --disable-static \
181 --without-python</userinput></screen>
182
183 <para>Restore the tool previously moved away:</para>
184
185<screen><userinput remap="configure">mv /usr/bin/ncursesw6-config{.tmp,}</userinput></screen>
186
187 <para>Compile the package:</para>
188
189<screen><userinput remap="make">make</userinput></screen>
190
191 <para>Install the package:</para>
192
193<screen><userinput remap="install">make DESTDIR=$PWD/DESTDIR install
194cp -Rv DESTDIR/usr/lib32/* /usr/lib32
195rm -rf DESTDIR</userinput></screen>
196
197 </sect2><!-- m32 -->
198
199 <!-- - - - - - - - - - -->
200 <!-- Multilib - x32bit -->
201 <!-- - - - - - - - - - -->
202
203 <sect2 arch="ml_x32,ml_all" role="installation">
204 <title>Installation of Util-linux - x32-bit</title>
205
206 <para>Clean previous build:</para>
207
208<screen><userinput remap="pre">make distclean</userinput></screen>
209
210 <para>Move a tool out of the way which is optionally used by
211 configure but will report invalid pathes for multilib builds.</para>
212
213<screen><userinput remap="configure">mv /usr/bin/ncursesw6-config{,.tmp}</userinput></screen>
214
215 <para>Prepare Util-linux for compilation:</para>
216
217<screen revision="sysv"><userinput remap="configure">CC="gcc -mx32" \
218./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
219 --host=x86_64-pc-linux-gnux32 \
220 --libdir=/usr/libx32 \
221 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
222 --disable-chfn-chsh \
223 --disable-login \
224 --disable-nologin \
225 --disable-su \
226 --disable-setpriv \
227 --disable-runuser \
228 --disable-pylibmount \
229 --disable-static \
230 --without-python \
231 --without-systemd \
232 --without-systemdsystemunitdir</userinput></screen>
233
234<screen revision="systemd"><userinput remap="configure">CC="gcc -mx32" \
235./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
236 --host=x86_64-pc-linux-gnux32 \
237 --libdir=/usr/libx32 \
238 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
239 --disable-chfn-chsh \
240 --disable-login \
241 --disable-nologin \
242 --disable-su \
243 --disable-setpriv \
244 --disable-runuser \
245 --disable-pylibmount \
246 --disable-static \
247 --without-python</userinput></screen>
248
249 <para>Restore the tool previously moved away:</para>
250
251<screen><userinput remap="configure">mv /usr/bin/ncursesw6-config{.tmp,}</userinput></screen>
252
253 <para>Compile the package:</para>
254
255<screen><userinput remap="make">make</userinput></screen>
256
257 <para>Install the package:</para>
258
259<screen><userinput remap="install">make DESTDIR=$PWD/DESTDIR install
260cp -Rv DESTDIR/usr/libx32/* /usr/libx32
261rm -rf DESTDIR</userinput></screen>
262
263 </sect2><!-- mx32 -->
264
265 <sect2 id="contents-utillinux" role="content">
266 <title>Contents of Util-linux</title>
267
268 <segmentedlist>
269 <segtitle>Installed programs</segtitle>
270 <segtitle>Installed libraries</segtitle>
271 <segtitle>Installed directories</segtitle>
272
273 <seglistitem>
274 <seg>addpart, agetty, blkdiscard, blkid, blkzone, blockdev, cal, cfdisk, chcpu,
275 chmem, choom, chrt, col, colcrt, colrm, column, ctrlaltdel, delpart, dmesg,
276 eject, fallocate, fdisk, fincore, findfs, findmnt, flock, fsck,
277 fsck.cramfs, fsck.minix, fsfreeze, fstrim, getopt, hardlink, hexdump, hwclock,
278 i386 (link to setarch), ionice, ipcmk, ipcrm, ipcs, irqtop, isosize, kill, last,
279 lastb (link to last), ldattach, linux32 (link to setarch), linux64 (link to setarch),
280 logger, look, losetup, lsblk, lscpu, lsipc, lsirq, lsfd, lslocks, lslogins,
281 lsmem, lsns, mcookie, mesg, mkfs, mkfs.bfs, mkfs.cramfs, mkfs.minix, mkswap,
282 more, mount, mountpoint, namei, nsenter, partx, pivot_root, prlimit,
283 readprofile, rename, renice, resizepart, rev, rfkill, rtcwake, script,
284 scriptlive, scriptreplay, setarch, setsid, setterm, sfdisk, sulogin, swaplabel,
285 swapoff, swapon, switch_root, taskset, uclampset, ul,
286 umount, uname26 (link to setarch), unshare, utmpdump, uuidd, uuidgen, uuidparse,
287 wall, wdctl, whereis, wipefs, x86_64 (link to setarch), and zramctl</seg>
288 <seg>libblkid.so, libfdisk.so, libmount.so,
289 libsmartcols.so, and libuuid.so</seg>
290 <seg>/usr/include/blkid,
291 /usr/include/libfdisk,
292 /usr/include/libmount,
293 /usr/include/libsmartcols,
294 /usr/include/uuid,
295 /usr/share/doc/util-linux-&util-linux-version;,
296 and /var/lib/hwclock</seg>
297 </seglistitem>
298 </segmentedlist>
299
300 <variablelist>
301 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
302 <?dbfo list-presentation="list"?>
303 <?dbhtml list-presentation="table"?>
304
305 <varlistentry id="addpart">
306 <term><command>addpart</command></term>
307 <listitem>
308 <para>Informs the Linux kernel of new partitions</para>
309 <indexterm zone="ch-system-util-linux addpart">
310 <primary sortas="b-addpart">addpart</primary>
311 </indexterm>
312 </listitem>
313 </varlistentry>
314
315 <varlistentry id="agetty">
316 <term><command>agetty</command></term>
317 <listitem>
318 <para>Opens a tty port, prompts for a login name,
319 and then invokes the <command>login</command> program</para>
320 <indexterm zone="ch-system-util-linux agetty">
321 <primary sortas="b-agetty">agetty</primary>
322 </indexterm>
323 </listitem>
324 </varlistentry>
325
326 <varlistentry id="blkdiscard">
327 <term><command>blkdiscard</command></term>
328 <listitem>
329 <para>Discards sectors on a device</para>
330 <indexterm zone="ch-system-util-linux blkdiscard">
331 <primary sortas="b-blkdiscard">blkdiscard</primary>
332 </indexterm>
333 </listitem>
334 </varlistentry>
335
336 <varlistentry id="blkid">
337 <term><command>blkid</command></term>
338 <listitem>
339 <para>A command line utility to locate and print block device
340 attributes</para>
341 <indexterm zone="ch-system-util-linux blkid">
342 <primary sortas="b-blkid">blkid</primary>
343 </indexterm>
344 </listitem>
345 </varlistentry>
346
347 <varlistentry id="blkzone">
348 <term><command>blkzone</command></term>
349 <listitem>
350 <para>Is used to manage zoned storage block devices</para>
351 <indexterm zone="ch-system-util-linux blkzone">
352 <primary sortas="b-blkzone">blkzone</primary>
353 </indexterm>
354 </listitem>
355 </varlistentry>
356
357 <varlistentry id="blockdev">
358 <term><command>blockdev</command></term>
359 <listitem>
360 <para>Allows users to call block device ioctls from the command
361 line</para>
362 <indexterm zone="ch-system-util-linux blockdev">
363 <primary sortas="b-blockdev">blockdev</primary>
364 </indexterm>
365 </listitem>
366 </varlistentry>
367
368 <varlistentry id="cal">
369 <term><command>cal</command></term>
370 <listitem>
371 <para>Displays a simple calendar</para>
372 <indexterm zone="ch-system-util-linux cal">
373 <primary sortas="b-cal">cal</primary>
374 </indexterm>
375 </listitem>
376 </varlistentry>
377
378 <varlistentry id="cfdisk">
379 <term><command>cfdisk</command></term>
380 <listitem>
381 <para>Manipulates the partition table of the given device</para>
382 <indexterm zone="ch-system-util-linux cfdisk">
383 <primary sortas="b-cfdisk">cfdisk</primary>
384 </indexterm>
385 </listitem>
386 </varlistentry>
387
388 <varlistentry id="chcpu">
389 <term><command>chcpu</command></term>
390 <listitem>
391 <para>Modifies the state of CPUs</para>
392 <indexterm zone="ch-system-util-linux chcpu">
393 <primary sortas="b-chcpu">chcpu</primary>
394 </indexterm>
395 </listitem>
396 </varlistentry>
397
398 <varlistentry id="chmem">
399 <term><command>chmem</command></term>
400 <listitem>
401 <para>Configures memory</para>
402 <indexterm zone="ch-system-util-linux chmem">
403 <primary sortas="b-chmem">chmem</primary>
404 </indexterm>
405 </listitem>
406 </varlistentry>
407
408 <varlistentry id="choom">
409 <term><command>choom</command></term>
410 <listitem>
411 <para>Displays and adjusts OOM-killer scores, used to determine
412 which process to kill first when Linux is Out Of Memory</para>
413 <indexterm zone="ch-system-util-linux choom">
414 <primary sortas="b-choom">choom</primary>
415 </indexterm>
416 </listitem>
417 </varlistentry>
418
419 <varlistentry id="chrt">
420 <term><command>chrt</command></term>
421 <listitem>
422 <para>Manipulates real-time attributes of a process</para>
423 <indexterm zone="ch-system-util-linux chrt">
424 <primary sortas="b-chrt">chrt</primary>
425 </indexterm>
426 </listitem>
427 </varlistentry>
428
429 <varlistentry id="col">
430 <term><command>col</command></term>
431 <listitem>
432 <para>Filters out reverse line feeds</para>
433 <indexterm zone="ch-system-util-linux col">
434 <primary sortas="b-col">col</primary>
435 </indexterm>
436 </listitem>
437 </varlistentry>
438
439 <varlistentry id="colcrt">
440 <term><command>colcrt</command></term>
441 <listitem>
442 <para>Filters <command>nroff</command> output for terminals
443 that lack some capabilities, such as overstriking and half-lines</para>
444 <indexterm zone="ch-system-util-linux colcrt">
445 <primary sortas="b-colcrt">colcrt</primary>
446 </indexterm>
447 </listitem>
448 </varlistentry>
449
450 <varlistentry id="colrm">
451 <term><command>colrm</command></term>
452 <listitem>
453 <para>Filters out the given columns</para>
454 <indexterm zone="ch-system-util-linux colrm">
455 <primary sortas="b-colrm">colrm</primary>
456 </indexterm>
457 </listitem>
458 </varlistentry>
459
460 <varlistentry id="column">
461 <term><command>column</command></term>
462 <listitem>
463 <para>Formats a given file into multiple columns</para>
464 <indexterm zone="ch-system-util-linux column">
465 <primary sortas="b-column">column</primary>
466 </indexterm>
467 </listitem>
468 </varlistentry>
469
470 <varlistentry id="ctrlaltdel">
471 <term><command>ctrlaltdel</command></term>
472 <listitem>
473 <para>Sets the function of the Ctrl+Alt+Del key combination to a
474 hard or a soft reset</para>
475 <indexterm zone="ch-system-util-linux ctrlaltdel">
476 <primary sortas="b-ctrlaltdel">ctrlaltdel</primary>
477 </indexterm>
478 </listitem>
479 </varlistentry>
480
481 <varlistentry id="delpart">
482 <term><command>delpart</command></term>
483 <listitem>
484 <para>Asks the Linux kernel to remove a partition</para>
485 <indexterm zone="ch-system-util-linux delpart">
486 <primary sortas="b-delpart">delpart</primary>
487 </indexterm>
488 </listitem>
489 </varlistentry>
490
491 <varlistentry id="dmesg">
492 <term><command>dmesg</command></term>
493 <listitem>
494 <para>Dumps the kernel boot messages</para>
495 <indexterm zone="ch-system-util-linux dmesg">
496 <primary sortas="b-dmesg">dmesg</primary>
497 </indexterm>
498 </listitem>
499 </varlistentry>
500
501 <varlistentry id="eject">
502 <term><command>eject</command></term>
503 <listitem>
504 <para>Ejects removable media</para>
505 <indexterm zone="ch-system-util-linux eject">
506 <primary sortas="b-eject">eject</primary>
507 </indexterm>
508 </listitem>
509 </varlistentry>
510
511 <varlistentry id="fallocate">
512 <term><command>fallocate</command></term>
513 <listitem>
514 <para>Preallocates space to a file</para>
515 <indexterm zone="ch-system-util-linux fallocate">
516 <primary sortas="b-fallocate">fallocate</primary>
517 </indexterm>
518 </listitem>
519 </varlistentry>
520
521 <varlistentry id="fdisk">
522 <term><command>fdisk</command></term>
523 <listitem>
524 <para>Manipulates the partition table of the given device</para>
525 <indexterm zone="ch-system-util-linux fdisk">
526 <primary sortas="b-fdisk">fdisk</primary>
527 </indexterm>
528 </listitem>
529 </varlistentry>
530
531 <varlistentry id="fincore">
532 <term><command>fincore</command></term>
533 <listitem>
534 <para>Counts pages of file contents in core</para>
535 <indexterm zone="ch-system-util-linux fincore">
536 <primary sortas="b-fincore">fincore</primary>
537 </indexterm>
538 </listitem>
539 </varlistentry>
540
541 <varlistentry id="findfs">
542 <term><command>findfs</command></term>
543 <listitem>
544 <para>Finds a file system, either by label or Universally Unique Identifier
545 (UUID)</para>
546 <indexterm zone="ch-system-util-linux findfs">
547 <primary sortas="b-findfs">findfs</primary>
548 </indexterm>
549 </listitem>
550 </varlistentry>
551
552 <varlistentry id="findmnt">
553 <term><command>findmnt</command></term>
554 <listitem>
555 <para>Is a command line interface to the libmount library
556 for working with mountinfo, fstab and mtab files</para>
557 <indexterm zone="ch-system-util-linux findmnt">
558 <primary sortas="b-findmnt">findmnt</primary>
559 </indexterm>
560 </listitem>
561 </varlistentry>
562
563 <varlistentry id="flock">
564 <term><command>flock</command></term>
565 <listitem>
566 <para>Acquires a file lock and then executes a command with the lock
567 held</para>
568 <indexterm zone="ch-system-util-linux flock">
569 <primary sortas="b-flock">flock</primary>
570 </indexterm>
571 </listitem>
572 </varlistentry>
573
574 <varlistentry id="fsck">
575 <term><command>fsck</command></term>
576 <listitem>
577 <para>Is used to check, and optionally repair, file systems</para>
578 <indexterm zone="ch-system-util-linux fsck">
579 <primary sortas="b-fsck">fsck</primary>
580 </indexterm>
581 </listitem>
582 </varlistentry>
583
584 <varlistentry id="fsck.cramfs">
585 <term><command>fsck.cramfs</command></term>
586 <listitem>
587 <para>Performs a consistency check on the Cramfs file system on the
588 given device</para>
589 <indexterm zone="ch-system-util-linux fsck.cramfs">
590 <primary sortas="b-fsck.cramfs">fsck.cramfs</primary>
591 </indexterm>
592 </listitem>
593 </varlistentry>
594
595 <varlistentry id="fsck.minix">
596 <term><command>fsck.minix</command></term>
597 <listitem>
598 <para>Performs a consistency check on the Minix file system on the
599 given device</para>
600 <indexterm zone="ch-system-util-linux fsck.minix">
601 <primary sortas="b-fsck.minix">fsck.minix</primary>
602 </indexterm>
603 </listitem>
604 </varlistentry>
605
606 <varlistentry id="fsfreeze">
607 <term><command>fsfreeze</command></term>
608 <listitem>
609 <para>Is a very simple wrapper around FIFREEZE/FITHAW ioctl
610 kernel driver operations</para>
611 <indexterm zone="ch-system-util-linux fsfreeze">
612 <primary sortas="b-fsfreeze">fsfreeze</primary>
613 </indexterm>
614 </listitem>
615 </varlistentry>
616
617 <varlistentry id="fstrim">
618 <term><command>fstrim</command></term>
619 <listitem>
620 <para>Discards unused blocks on a mounted filesystem</para>
621 <indexterm zone="ch-system-util-linux fstrim">
622 <primary sortas="b-fstrim">fstrim</primary>
623 </indexterm>
624 </listitem>
625 </varlistentry>
626
627 <varlistentry id="getopt">
628 <term><command>getopt</command></term>
629 <listitem>
630 <para>Parses options in the given command line</para>
631 <indexterm zone="ch-system-util-linux getopt">
632 <primary sortas="b-getopt">getopt</primary>
633 </indexterm>
634 </listitem>
635 </varlistentry>
636
637 <varlistentry id="hardlink">
638 <term><command>hardlink</command></term>
639 <listitem>
640 <para>Consolidates duplicate files by creating hard links</para>
641 <indexterm zone="ch-system-util-linux hardlink">
642 <primary sortas="b-hardlink">hardlink</primary>
643 </indexterm>
644 </listitem>
645 </varlistentry>
646
647 <varlistentry id="hexdump">
648 <term><command>hexdump</command></term>
649 <listitem>
650 <para>Dumps the given file in hexadecimal, decimal, octal,
651 or ascii</para>
652 <indexterm zone="ch-system-util-linux hexdump">
653 <primary sortas="b-hexdump">hexdump</primary>
654 </indexterm>
655 </listitem>
656 </varlistentry>
657
658 <varlistentry id="hwclock">
659 <term><command>hwclock</command></term>
660 <listitem>
661 <para>Reads or sets the system's hardware clock, also called
662 the Real-Time Clock (RTC) or Basic Input-Output System (BIOS)
663 clock</para>
664 <indexterm zone="ch-system-util-linux hwclock">
665 <primary sortas="b-hwclock">hwclock</primary>
666 </indexterm>
667 </listitem>
668 </varlistentry>
669
670 <varlistentry id="i386">
671 <term><command>i386</command></term>
672 <listitem>
673 <para>A symbolic link to setarch</para>
674 <indexterm zone="ch-system-util-linux i386">
675 <primary sortas="b-i386">i386</primary>
676 </indexterm>
677 </listitem>
678 </varlistentry>
679
680 <varlistentry id="ionice">
681 <term><command>ionice</command></term>
682 <listitem>
683 <para>Gets or sets the io scheduling class and priority for a program</para>
684 <indexterm zone="ch-system-util-linux ionice">
685 <primary sortas="b-ionice">ionice</primary>
686 </indexterm>
687 </listitem>
688 </varlistentry>
689
690 <varlistentry id="ipcmk">
691 <term><command>ipcmk</command></term>
692 <listitem>
693 <para>Creates various IPC resources</para>
694 <indexterm zone="ch-system-util-linux ipcmk">
695 <primary sortas="b-ipcmk">ipcmk</primary>
696 </indexterm>
697 </listitem>
698 </varlistentry>
699
700 <varlistentry id="ipcrm">
701 <term><command>ipcrm</command></term>
702 <listitem>
703 <para>Removes the given Inter-Process Communication (IPC) resource</para>
704 <indexterm zone="ch-system-util-linux ipcrm">
705 <primary sortas="b-ipcrm">ipcrm</primary>
706 </indexterm>
707 </listitem>
708 </varlistentry>
709
710 <varlistentry id="ipcs">
711 <term><command>ipcs</command></term>
712 <listitem>
713 <para>Provides IPC status information</para>
714 <indexterm zone="ch-system-util-linux ipcs">
715 <primary sortas="b-ipcs">ipcs</primary>
716 </indexterm>
717 </listitem>
718 </varlistentry>
719
720 <varlistentry id="irqtop">
721 <term><command>irqtop</command></term>
722 <listitem>
723 <para>Displays kernel interrupt counter information in
724 <ulink role='man' url='&man;top.1'>top(1)</ulink> style
725 view</para>
726 <indexterm zone="ch-system-util-linux irqtop">
727 <primary sortas="b-irqtop">irqtop</primary>
728 </indexterm>
729 </listitem>
730 </varlistentry>
731
732 <varlistentry id="isosize">
733 <term><command>isosize</command></term>
734 <listitem>
735 <para>Reports the size of an iso9660 file system</para>
736 <indexterm zone="ch-system-util-linux isosize">
737 <primary sortas="b-isosize">isosize</primary>
738 </indexterm>
739 </listitem>
740 </varlistentry>
741
742 <varlistentry id="kill">
743 <term><command>kill</command></term>
744 <listitem>
745 <para>Sends signals to processes</para>
746 <indexterm zone="ch-system-util-linux kill">
747 <primary sortas="b-kill">kill</primary>
748 </indexterm>
749 </listitem>
750 </varlistentry>
751
752 <varlistentry id="last">
753 <term><command>last</command></term>
754 <listitem>
755 <para>Shows which users last logged in (and out), searching back
756 through the <filename>/var/log/wtmp</filename> file; it also shows
757 system boots, shutdowns, and run-level changes</para>
758 <indexterm zone="ch-system-util-linux last">
759 <primary sortas="b-last">last</primary>
760 </indexterm>
761 </listitem>
762 </varlistentry>
763
764 <varlistentry id="lastb">
765 <term><command>lastb</command></term>
766 <listitem>
767 <para>Shows the failed login attempts, as logged in
768 <filename>/var/log/btmp</filename></para>
769 <indexterm zone="ch-system-util-linux lastb">
770 <primary sortas="b-lastb">lastb</primary>
771 </indexterm>
772 </listitem>
773 </varlistentry>
774
775 <varlistentry id="ldattach">
776 <term><command>ldattach</command></term>
777 <listitem>
778 <para>Attaches a line discipline to a serial line</para>
779 <indexterm zone="ch-system-util-linux ldattach">
780 <primary sortas="b-ldattach">ldattach</primary>
781 </indexterm>
782 </listitem>
783 </varlistentry>
784
785 <varlistentry id="linux32">
786 <term><command>linux32</command></term>
787 <listitem>
788 <para>A symbolic link to setarch</para>
789 <indexterm zone="ch-system-util-linux linux32">
790 <primary sortas="b-linux32">linux32</primary>
791 </indexterm>
792 </listitem>
793 </varlistentry>
794
795 <varlistentry id="linux64">
796 <term><command>linux64</command></term>
797 <listitem>
798 <para>A symbolic link to setarch</para>
799 <indexterm zone="ch-system-util-linux linux64">
800 <primary sortas="b-linux64">linux64</primary>
801 </indexterm>
802 </listitem>
803 </varlistentry>
804
805 <varlistentry id="logger">
806 <term><command>logger</command></term>
807 <listitem>
808 <para>Enters the given message into the system log</para>
809 <indexterm zone="ch-system-util-linux logger">
810 <primary sortas="b-logger">logger</primary>
811 </indexterm>
812 </listitem>
813 </varlistentry>
814
815 <varlistentry id="look">
816 <term><command>look</command></term>
817 <listitem>
818 <para>Displays lines that begin with the given string</para>
819 <indexterm zone="ch-system-util-linux look">
820 <primary sortas="b-look">look</primary>
821 </indexterm>
822 </listitem>
823 </varlistentry>
824
825 <varlistentry id="losetup">
826 <term><command>losetup</command></term>
827 <listitem>
828 <para>Sets up and controls loop devices</para>
829 <indexterm zone="ch-system-util-linux losetup">
830 <primary sortas="b-losetup">losetup</primary>
831 </indexterm>
832 </listitem>
833 </varlistentry>
834
835 <varlistentry id="lsblk">
836 <term><command>lsblk</command></term>
837 <listitem>
838 <para>Lists information about all or selected block devices in
839 a tree-like format</para>
840 <indexterm zone="ch-system-util-linux lsblk">
841 <primary sortas="b-lsblk">lsblk</primary>
842 </indexterm>
843 </listitem>
844 </varlistentry>
845
846 <varlistentry id="lscpu">
847 <term><command>lscpu</command></term>
848 <listitem>
849 <para>Prints CPU architecture information</para>
850 <indexterm zone="ch-system-util-linux lscpu">
851 <primary sortas="b-lscpu">lscpu</primary>
852 </indexterm>
853 </listitem>
854 </varlistentry>
855
856 <varlistentry id="lsfd">
857 <term><command>lsfd</command></term>
858 <listitem>
859 <para>Displays information about open files; replaces <command>lsof</command></para>
860 <indexterm zone="ch-system-util-linux lsfd">
861 <primary sortas="b-lsfd">lsfd</primary>
862 </indexterm>
863 </listitem>
864 </varlistentry>
865
866 <varlistentry id="lsipc">
867 <term><command>lsipc</command></term>
868 <listitem>
869 <para>Prints information on IPC facilities currently employed
870 in the system</para>
871 <indexterm zone="ch-system-util-linux lsipc">
872 <primary sortas="b-lsipc">lsipc</primary>
873 </indexterm>
874 </listitem>
875 </varlistentry>
876
877 <varlistentry id="lsirq">
878 <term><command>lsirq</command></term>
879 <listitem>
880 <para>Displays kernel interrupt counter information</para>
881 <indexterm zone="ch-system-util-linux lsirq">
882 <primary sortas="b-lsirq">lsirq</primary>
883 </indexterm>
884 </listitem>
885 </varlistentry>
886
887 <varlistentry id="lslocks">
888 <term><command>lslocks</command></term>
889 <listitem>
890 <para>Lists local system locks</para>
891 <indexterm zone="ch-system-util-linux lslocks">
892 <primary sortas="b-lslocks">lslocks</primary>
893 </indexterm>
894 </listitem>
895 </varlistentry>
896
897 <varlistentry id="lslogins">
898 <term><command>lslogins</command></term>
899 <listitem>
900 <para>Lists information about users, groups and system accounts</para>
901 <indexterm zone="ch-system-util-linux lslogins">
902 <primary sortas="b-lslogins">lslogins</primary>
903 </indexterm>
904 </listitem>
905 </varlistentry>
906
907 <varlistentry id="lsmem">
908 <term><command>lsmem</command></term>
909 <listitem>
910 <para>Lists the ranges of available memory with their online
911 status</para>
912 <indexterm zone="ch-system-util-linux lsmem">
913 <primary sortas="b-lsmem">lsmem</primary>
914 </indexterm>
915 </listitem>
916 </varlistentry>
917
918 <varlistentry id="lsns">
919 <term><command>lsns</command></term>
920 <listitem>
921 <para>Lists namespaces</para>
922 <indexterm zone="ch-system-util-linux lsns">
923 <primary sortas="b-lsns">lsns</primary>
924 </indexterm>
925 </listitem>
926 </varlistentry>
927
928 <varlistentry id="mcookie">
929 <term><command>mcookie</command></term>
930 <listitem>
931 <para>Generates magic cookies (128-bit random hexadecimal numbers) for
932 <command>xauth</command></para>
933 <indexterm zone="ch-system-util-linux mcookie">
934 <primary sortas="b-mcookie">mcookie</primary>
935 </indexterm>
936 </listitem>
937 </varlistentry>
938
939 <varlistentry id="mesg">
940 <term><command>mesg</command></term>
941 <listitem>
942 <para>Controls whether other users can send messages to the current
943 user's terminal</para>
944 <indexterm zone="ch-system-util-linux mesg">
945 <primary sortas="b-mesg">mesg</primary>
946 </indexterm>
947 </listitem>
948 </varlistentry>
949
950 <varlistentry id="mkfs">
951 <term><command>mkfs</command></term>
952 <listitem>
953 <para>Builds a file system on a device (usually a hard disk
954 partition)</para>
955 <indexterm zone="ch-system-util-linux mkfs">
956 <primary sortas="b-mkfs">mkfs</primary>
957 </indexterm>
958 </listitem>
959 </varlistentry>
960
961 <varlistentry id="mkfs.bfs">
962 <term><command>mkfs.bfs</command></term>
963 <listitem>
964 <para>Creates a Santa Cruz Operations (SCO) bfs file system</para>
965 <indexterm zone="ch-system-util-linux mkfs.bfs">
966 <primary sortas="b-mkfs.bfs">mkfs.bfs</primary>
967 </indexterm>
968 </listitem>
969 </varlistentry>
970
971 <varlistentry id="mkfs.cramfs">
972 <term><command>mkfs.cramfs</command></term>
973 <listitem>
974 <para>Creates a cramfs file system</para>
975 <indexterm zone="ch-system-util-linux mkfs.cramfs">
976 <primary sortas="b-mkfs.cramfs">mkfs.cramfs</primary>
977 </indexterm>
978 </listitem>
979 </varlistentry>
980
981 <varlistentry id="mkfs.minix">
982 <term><command>mkfs.minix</command></term>
983 <listitem>
984 <para>Creates a Minix file system</para>
985 <indexterm zone="ch-system-util-linux mkfs.minix">
986 <primary sortas="b-mkfs.minix">mkfs.minix</primary>
987 </indexterm>
988 </listitem>
989 </varlistentry>
990
991 <varlistentry id="mkswap">
992 <term><command>mkswap</command></term>
993 <listitem>
994 <para>Initializes the given device or file to be used as a swap
995 area</para>
996 <indexterm zone="ch-system-util-linux mkswap">
997 <primary sortas="b-mkswap">mkswap</primary>
998 </indexterm>
999 </listitem>
1000 </varlistentry>
1001
1002 <varlistentry id="more">
1003 <term><command>more</command></term>
1004 <listitem>
1005 <para>A filter for paging through text one screen at a time</para>
1006 <indexterm zone="ch-system-util-linux more">
1007 <primary sortas="b-more">more</primary>
1008 </indexterm>
1009 </listitem>
1010 </varlistentry>
1011
1012 <varlistentry id="mount">
1013 <term><command>mount</command></term>
1014 <listitem>
1015 <para>Attaches the file system on the given device to a specified
1016 directory in the file-system tree</para>
1017 <indexterm zone="ch-system-util-linux mount">
1018 <primary sortas="b-mount">mount</primary>
1019 </indexterm>
1020 </listitem>
1021 </varlistentry>
1022
1023 <varlistentry id="mountpoint">
1024 <term><command>mountpoint</command></term>
1025 <listitem>
1026 <para>Checks if the directory is a mountpoint</para>
1027 <indexterm zone="ch-system-util-linux mountpoint">
1028 <primary sortas="b-mountpoint">mountpoint</primary>
1029 </indexterm>
1030 </listitem>
1031 </varlistentry>
1032
1033 <varlistentry id="namei">
1034 <term><command>namei</command></term>
1035 <listitem>
1036 <para>Shows the symbolic links in the given paths</para>
1037 <indexterm zone="ch-system-util-linux namei">
1038 <primary sortas="b-namei">namei</primary>
1039 </indexterm>
1040 </listitem>
1041 </varlistentry>
1042
1043 <varlistentry id="nsenter">
1044 <term><command>nsenter</command></term>
1045 <listitem>
1046 <para>Runs a program with namespaces of other processes</para>
1047 <indexterm zone="ch-system-util-linux nsenter">
1048 <primary sortas="b-nsenter">nsenter</primary>
1049 </indexterm>
1050 </listitem>
1051 </varlistentry>
1052
1053 <varlistentry id="partx">
1054 <term><command>partx</command></term>
1055 <listitem>
1056 <para>Tells the kernel about the presence and numbering of on-disk
1057 partitions</para>
1058 <indexterm zone="ch-system-util-linux partx">
1059 <primary sortas="b-partx">partx</primary>
1060 </indexterm>
1061 </listitem>
1062 </varlistentry>
1063
1064 <varlistentry id="pivot_root">
1065 <term><command>pivot_root</command></term>
1066 <listitem>
1067 <para>Makes the given file system the new root file system of the
1068 current process</para>
1069 <indexterm zone="ch-system-util-linux pivot_root">
1070 <primary sortas="b-pivot_root">pivot_root</primary>
1071 </indexterm>
1072 </listitem>
1073 </varlistentry>
1074
1075 <varlistentry id="prlimit">
1076 <term><command>prlimit</command></term>
1077 <listitem>
1078 <para>Gets and sets a process's resource limits</para>
1079 <indexterm zone="ch-system-util-linux prlimit">
1080 <primary sortas="b-prlimit">prlimit</primary>
1081 </indexterm>
1082 </listitem>
1083 </varlistentry>
1084
1085 <varlistentry id="readprofile">
1086 <term><command>readprofile</command></term>
1087 <listitem>
1088 <para>Reads kernel profiling information</para>
1089 <indexterm zone="ch-system-util-linux readprofile">
1090 <primary sortas="b-readprofile">readprofile</primary>
1091 </indexterm>
1092 </listitem>
1093 </varlistentry>
1094
1095 <varlistentry id="rename">
1096 <term><command>rename</command></term>
1097 <listitem>
1098 <para>Renames the given files, replacing a given string with
1099 another</para>
1100 <indexterm zone="ch-system-util-linux rename">
1101 <primary sortas="b-rename">rename</primary>
1102 </indexterm>
1103 </listitem>
1104 </varlistentry>
1105
1106 <varlistentry id="renice">
1107 <term><command>renice</command></term>
1108 <listitem>
1109 <para>Alters the priority of running processes</para>
1110 <indexterm zone="ch-system-util-linux renice">
1111 <primary sortas="b-renice">renice</primary>
1112 </indexterm>
1113 </listitem>
1114 </varlistentry>
1115
1116 <varlistentry id="resizepart">
1117 <term><command>resizepart</command></term>
1118 <listitem>
1119 <para>Asks the Linux kernel to resize a partition</para>
1120 <indexterm zone="ch-system-util-linux resizepart">
1121 <primary sortas="b-resizepart">resizepart</primary>
1122 </indexterm>
1123 </listitem>
1124 </varlistentry>
1125
1126 <varlistentry id="rev">
1127 <term><command>rev</command></term>
1128 <listitem>
1129 <para>Reverses the lines of a given file</para>
1130 <indexterm zone="ch-system-util-linux rev">
1131 <primary sortas="b-rev">rev</primary>
1132 </indexterm>
1133 </listitem>
1134 </varlistentry>
1135
1136 <varlistentry id="rfkill">
1137 <term><command>rfkill</command></term>
1138 <listitem>
1139 <para>Tool for enabling and disabling wireless devices</para>
1140 <indexterm zone="ch-system-util-linux rfkill">
1141 <primary sortas="b-rfkill">rfkill</primary>
1142 </indexterm>
1143 </listitem>
1144 </varlistentry>
1145
1146 <varlistentry id="rtcwake">
1147 <term><command>rtcwake</command></term>
1148 <listitem>
1149 <para>Used to enter a system sleep state until the specified wakeup
1150 time</para>
1151 <indexterm zone="ch-system-util-linux rtcwake">
1152 <primary sortas="b-rtcwake">rtcwake</primary>
1153 </indexterm>
1154 </listitem>
1155 </varlistentry>
1156
1157 <varlistentry id="script">
1158 <term><command>script</command></term>
1159 <listitem>
1160 <para>Makes a typescript of a terminal session</para>
1161 <indexterm zone="ch-system-util-linux script">
1162 <primary sortas="b-script">script</primary>
1163 </indexterm>
1164 </listitem>
1165 </varlistentry>
1166
1167 <varlistentry id="scriptlive">
1168 <term><command>scriptlive</command></term>
1169 <listitem>
1170 <para>Re-runs session typescripts using timing information</para>
1171 <indexterm zone="ch-system-util-linux scriptlive">
1172 <primary sortas="b-scriptlive">scriptlive</primary>
1173 </indexterm>
1174 </listitem>
1175 </varlistentry>
1176
1177 <varlistentry id="scriptreplay">
1178 <term><command>scriptreplay</command></term>
1179 <listitem>
1180 <para>Plays back typescripts using timing information</para>
1181 <indexterm zone="ch-system-util-linux scriptreplay">
1182 <primary sortas="b-scriptreplay">scriptreplay</primary>
1183 </indexterm>
1184 </listitem>
1185 </varlistentry>
1186
1187 <varlistentry id="setarch">
1188 <term><command>setarch</command></term>
1189 <listitem>
1190 <para>Changes reported architecture in a new program environment, and
1191 sets personality flags</para>
1192 <indexterm zone="ch-system-util-linux setarch">
1193 <primary sortas="b-setarch">setarch</primary>
1194 </indexterm>
1195 </listitem>
1196 </varlistentry>
1197
1198 <varlistentry id="setsid">
1199 <term><command>setsid</command></term>
1200 <listitem>
1201 <para>Runs the given program in a new session</para>
1202 <indexterm zone="ch-system-util-linux setsid">
1203 <primary sortas="b-setsid">setsid</primary>
1204 </indexterm>
1205 </listitem>
1206 </varlistentry>
1207
1208 <varlistentry id="setterm">
1209 <term><command>setterm</command></term>
1210 <listitem>
1211 <para>Sets terminal attributes</para>
1212 <indexterm zone="ch-system-util-linux setterm">
1213 <primary sortas="b-setterm">setterm</primary>
1214 </indexterm>
1215 </listitem>
1216 </varlistentry>
1217
1218 <varlistentry id="sfdisk">
1219 <term><command>sfdisk</command></term>
1220 <listitem>
1221 <para>A disk partition table manipulator</para>
1222 <indexterm zone="ch-system-util-linux sfdisk">
1223 <primary sortas="b-sfdisk">sfdisk</primary>
1224 </indexterm>
1225 </listitem>
1226 </varlistentry>
1227
1228 <varlistentry id="sulogin">
1229 <term><command>sulogin</command></term>
1230 <listitem>
1231 <para>Allows <systemitem class="username">root</systemitem> to log in;
1232 it is normally invoked by <command>init</command> when the system goes
1233 into single user mode</para>
1234 <indexterm zone="ch-system-util-linux sulogin">
1235 <primary sortas="b-sulogin">sulogin</primary>
1236 </indexterm>
1237 </listitem>
1238 </varlistentry>
1239
1240 <varlistentry id="swaplabel">
1241 <term><command>swaplabel</command></term>
1242 <listitem>
1243 <para>Makes changes to the swap area's UUID and label</para>
1244 <indexterm zone="ch-system-util-linux swaplabel">
1245 <primary sortas="b-swaplabel">swaplabel</primary>
1246 </indexterm>
1247 </listitem>
1248 </varlistentry>
1249
1250 <varlistentry id="swapoff">
1251 <term><command>swapoff</command></term>
1252 <listitem>
1253 <para>Disables devices and files for paging and swapping</para>
1254 <indexterm zone="ch-system-util-linux swapoff">
1255 <primary sortas="b-swapoff">swapoff</primary>
1256 </indexterm>
1257 </listitem>
1258 </varlistentry>
1259
1260 <varlistentry id="swapon">
1261 <term><command>swapon</command></term>
1262 <listitem>
1263 <para>Enables devices and files for paging and swapping, and
1264 lists the devices and files currently in use</para>
1265 <indexterm zone="ch-system-util-linux swapon">
1266 <primary sortas="b-swapon">swapon</primary>
1267 </indexterm>
1268 </listitem>
1269 </varlistentry>
1270
1271 <varlistentry id="switch_root">
1272 <term><command>switch_root</command></term>
1273 <listitem>
1274 <para>Switches to another filesystem as the root of the mount tree</para>
1275 <indexterm zone="ch-system-util-linux switch_root">
1276 <primary sortas="b-switch_root">switch_root</primary>
1277 </indexterm>
1278 </listitem>
1279 </varlistentry>
1280
1281 <varlistentry id="taskset">
1282 <term><command>taskset</command></term>
1283 <listitem>
1284 <para>Retrieves or sets a process's CPU affinity</para>
1285 <indexterm zone="ch-system-util-linux taskset">
1286 <primary sortas="b-taskset">taskset</primary>
1287 </indexterm>
1288 </listitem>
1289 </varlistentry>
1290
1291 <varlistentry id="uclampset">
1292 <term><command>uclampset</command></term>
1293 <listitem>
1294 <para>Manipulates the utilization clamping attributes of the
1295 system or a process</para>
1296 <indexterm zone="ch-system-util-linux uclampset">
1297 <primary sortas="b-uclampset">uclampset</primary>
1298 </indexterm>
1299 </listitem>
1300 </varlistentry>
1301
1302 <varlistentry id="ul">
1303 <term><command>ul</command></term>
1304 <listitem>
1305 <para>A filter for translating underscores into escape sequences
1306 indicating underlining for the terminal in use</para>
1307 <indexterm zone="ch-system-util-linux ul">
1308 <primary sortas="b-ul">ul</primary>
1309 </indexterm>
1310 </listitem>
1311 </varlistentry>
1312
1313 <varlistentry id="umount">
1314 <term><command>umount</command></term>
1315 <listitem>
1316 <para>Disconnects a file system from the system's file tree</para>
1317 <indexterm zone="ch-system-util-linux umount">
1318 <primary sortas="b-umount">umount</primary>
1319 </indexterm>
1320 </listitem>
1321 </varlistentry>
1322
1323 <varlistentry id="uname26">
1324 <term><command>uname26</command></term>
1325 <listitem>
1326 <para>A symbolic link to setarch</para>
1327 <indexterm zone="ch-system-util-linux uname26">
1328 <primary sortas="b-uname26">uname26</primary>
1329 </indexterm>
1330 </listitem>
1331 </varlistentry>
1332
1333 <varlistentry id="unshare">
1334 <term><command>unshare</command></term>
1335 <listitem>
1336 <para>Runs a program with some namespaces unshared from parent</para>
1337 <indexterm zone="ch-system-util-linux unshare">
1338 <primary sortas="b-unshare">unshare</primary>
1339 </indexterm>
1340 </listitem>
1341 </varlistentry>
1342
1343 <varlistentry id="utmpdump">
1344 <term><command>utmpdump</command></term>
1345 <listitem>
1346 <para>Displays the content of the given login file in a
1347 user-friendly format</para>
1348 <indexterm zone="ch-system-util-linux utmpdump">
1349 <primary sortas="b-utmpdump">utmpdump</primary>
1350 </indexterm>
1351 </listitem>
1352 </varlistentry>
1353
1354 <varlistentry id="uuidd">
1355 <term><command>uuidd</command></term>
1356 <listitem>
1357 <para>A daemon used by the UUID library to generate time-based
1358 UUIDs in a secure and guaranteed-unique fashion</para>
1359 <indexterm zone="ch-system-util-linux uuidd">
1360 <primary sortas="b-uuidd">uuidd</primary>
1361 </indexterm>
1362 </listitem>
1363 </varlistentry>
1364
1365 <varlistentry id="uuidgen">
1366 <term><command>uuidgen</command></term>
1367 <listitem>
1368 <para>Creates new UUIDs. Each new UUID is a random number likely to be
1369 unique among all UUIDs created, on the local system and on other
1370 systems, in the past and in the future, with extremely high
1371 probability (2<superscript>128</superscript> UUIDs are
1372 possible)</para>
1373 <indexterm zone="ch-system-util-linux uuidgen">
1374 <primary sortas="b-uuidgen">uuidgen</primary>
1375 </indexterm>
1376 </listitem>
1377 </varlistentry>
1378
1379 <varlistentry id="uuidparse">
1380 <term><command>uuidparse</command></term>
1381 <listitem>
1382 <para>A utility to parse unique identifiers</para>
1383 <indexterm zone="ch-system-util-linux uuidparse">
1384 <primary sortas="b-uuidparse">uuidparse</primary>
1385 </indexterm>
1386 </listitem>
1387 </varlistentry>
1388
1389 <varlistentry id="wall">
1390 <term><command>wall</command></term>
1391 <listitem>
1392 <para>Displays the contents of a file or, by default, its standard
1393 input, on the terminals of all currently logged in users</para>
1394 <indexterm zone="ch-system-util-linux wall">
1395 <primary sortas="b-wall">wall</primary>
1396 </indexterm>
1397 </listitem>
1398 </varlistentry>
1399
1400 <varlistentry id="wdctl">
1401 <term><command>wdctl</command></term>
1402 <listitem>
1403 <para>Shows hardware watchdog status</para>
1404 <indexterm zone="ch-system-util-linux wdctl">
1405 <primary sortas="b-wdctl">wdctl</primary>
1406 </indexterm>
1407 </listitem>
1408 </varlistentry>
1409
1410 <varlistentry id="whereis">
1411 <term><command>whereis</command></term>
1412 <listitem>
1413 <para>Reports the location of the binary, source, and man page
1414 files for the given command</para>
1415 <indexterm zone="ch-system-util-linux whereis">
1416 <primary sortas="b-whereis">whereis</primary>
1417 </indexterm>
1418 </listitem>
1419 </varlistentry>
1420
1421 <varlistentry id="wipefs">
1422 <term><command>wipefs</command></term>
1423 <listitem>
1424 <para>Wipes a filesystem signature from a device</para>
1425 <indexterm zone="ch-system-util-linux wipefs">
1426 <primary sortas="b-wipefs">wipefs</primary>
1427 </indexterm>
1428 </listitem>
1429 </varlistentry>
1430
1431 <varlistentry id="x86_64">
1432 <term><command>x86_64</command></term>
1433 <listitem>
1434 <para>A symbolic link to setarch</para>
1435 <indexterm zone="ch-system-util-linux x86_64">
1436 <primary sortas="b-x86_64">x86_64</primary>
1437 </indexterm>
1438 </listitem>
1439 </varlistentry>
1440
1441 <varlistentry id="zramctl">
1442 <term><command>zramctl</command></term>
1443 <listitem>
1444 <para>A program to set up and control zram (compressed ram disk)
1445 devices</para>
1446 <indexterm zone="ch-system-util-linux zramctl">
1447 <primary sortas="b-zramctl">zramctl</primary>
1448 </indexterm>
1449 </listitem>
1450 </varlistentry>
1451
1452 <varlistentry id="libblkid">
1453 <term><filename class="libraryfile">libblkid</filename></term>
1454 <listitem>
1455 <para>Contains routines for device identification and token
1456 extraction</para>
1457 <indexterm zone="ch-system-util-linux libblkid">
1458 <primary sortas="c-libblkid">libblkid</primary>
1459 </indexterm>
1460 </listitem>
1461 </varlistentry>
1462
1463 <varlistentry id="libfdisk">
1464 <term><filename class="libraryfile">libfdisk</filename></term>
1465 <listitem>
1466 <para>Contains routines for manipulating partition tables</para>
1467 <indexterm zone="ch-system-util-linux libfdisk">
1468 <primary sortas="c-libfdisk">libfdisk</primary>
1469 </indexterm>
1470 </listitem>
1471 </varlistentry>
1472
1473 <varlistentry id="libmount">
1474 <term><filename class="libraryfile">libmount</filename></term>
1475 <listitem>
1476 <para>Contains routines for block device mounting and
1477 unmounting</para>
1478 <indexterm zone="ch-system-util-linux libmount">
1479 <primary sortas="c-libmount">libmount</primary>
1480 </indexterm>
1481 </listitem>
1482 </varlistentry>
1483
1484 <varlistentry id="libsmartcols">
1485 <term><filename class="libraryfile">libsmartcols</filename></term>
1486 <listitem>
1487 <para>Contains routines for aiding screen output in tabular form</para>
1488 <indexterm zone="ch-system-util-linux libsmartcols">
1489 <primary sortas="c-libsmartcols">libsmartcols</primary>
1490 </indexterm>
1491 </listitem>
1492 </varlistentry>
1493
1494 <varlistentry id="libuuid">
1495 <term><filename class="libraryfile">libuuid</filename></term>
1496 <listitem>
1497 <para>Contains routines for generating unique identifiers for objects
1498 that may be accessible beyond the local system</para>
1499 <indexterm zone="ch-system-util-linux libuuid">
1500 <primary sortas="c-libuuid">libuuid</primary>
1501 </indexterm>
1502 </listitem>
1503 </varlistentry>
1504
1505 </variablelist>
1506
1507 </sect2>
1508
1509</sect1>
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