source: chapter08/util-linux.xml@ 5de5f1b

multilib
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Automatic merge of trunk into multilib

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1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4 <!ENTITY % general-entities SYSTEM "../general.ent">
5 %general-entities;
6]>
7
8<sect1 id="ch-system-util-linux" role="wrap">
9 <?dbhtml filename="util-linux.html"?>
10
11 <sect1info condition="script">
12 <productname>util-linux</productname>
13 <productnumber>&util-linux-version;</productnumber>
14 <address>&util-linux-url;</address>
15 </sect1info>
16
17 <title>Util-linux-&util-linux-version;</title>
18
19 <indexterm zone="ch-system-util-linux">
20 <primary sortas="a-Util-linux">Util-linux</primary>
21 </indexterm>
22
23 <sect2 role="package">
24 <title/>
25
26 <para>The Util-linux package contains miscellaneous utility programs.
27 Among them are utilities for handling file systems, consoles, partitions,
28 and messages.</para>
29
30 <segmentedlist>
31 <segtitle>&buildtime;</segtitle>
32 <segtitle>&diskspace;</segtitle>
33
34 <seglistitem>
35 <seg>&util-linux-fin-sbu;</seg>
36 <seg>&util-linux-fin-du;</seg>
37 </seglistitem>
38 </segmentedlist>
39
40 </sect2>
41
42 <sect2 role="installation">
43 <title>Installation of Util-linux</title>
44
45 <para>First, disable a problem test:</para>
46
47 <screen><userinput remap="pre">sed -i '/test_mkfds/s/^/#/' tests/helpers/Makemodule.am</userinput></screen>
48
49 <para>Prepare Util-linux for compilation:</para>
50
51<screen revision="sysv"><userinput remap="configure">./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
52 --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-static \
64 --without-python \
65 --without-systemd \
66 --without-systemdsystemunitdir \
67 --docdir=/usr/share/doc/util-linux-&util-linux-version;</userinput></screen>
68
69<screen revision="systemd"><userinput remap="configure">./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
70 --bindir=/usr/bin \
71 --libdir=/usr/lib \
72 --runstatedir=/run \
73 --sbindir=/usr/sbin \
74 --disable-chfn-chsh \
75 --disable-login \
76 --disable-nologin \
77 --disable-su \
78 --disable-setpriv \
79 --disable-runuser \
80 --disable-pylibmount \
81 --disable-static \
82 --without-python \
83 --docdir=/usr/share/doc/util-linux-&util-linux-version;</userinput></screen>
84
85 <para>The --disable and --without options prevent warnings about
86 building components that either require packages not in LFS, or are
87 inconsistent with programs installed by other packages.</para>
88
89 <para>Compile the package:</para>
90
91<screen><userinput remap="make">make</userinput></screen>
92
93 <para>If desired, run the test suite as a non-&root; user:</para>
94
95 <warning><para>Running the test suite as the
96 <systemitem class="username">root</systemitem> user can be harmful to
97 your system. To run it, the CONFIG_SCSI_DEBUG option for the kernel must
98 be available in the currently running system and must be built as a
99 module. Building it into the kernel will prevent booting. For complete
100 coverage, other BLFS packages must be installed. If desired, this test can
101 be run by booting into the completed LFS system and running:</para>
102
103<screen role="nodump"><userinput>bash tests/run.sh --srcdir=$PWD --builddir=$PWD</userinput></screen>
104 </warning>
105
106<screen><userinput remap="test">chown -Rv tester .
107su tester -c "make -k check"</userinput></screen>
108
109 <para>The <emphasis>hardlink</emphasis> tests will fail if the host's kernel
110 does not have the option <option>CONFIG_CRYPTO_USER_API_HASH</option>
111 enabled or does not have any options providing a SHA256 implementation
112 (for example, <option>CONFIG_CRYPTO_SHA256</option>, or
113 <option>CONFIG_CRYPTO_SHA256_SSSE3</option> if the CPU supports
114 Supplemental SSE3) enabled. In addition,
115 two sub-tests from misc: mbsencode and one sub-test from script: replay are
116 known to fail.</para>
117
118 <para>Install the package:</para>
119
120<screen><userinput remap="install">make install</userinput></screen>
121<!--
122 <para>Finally, install the man pages:</para>
123
124<screen><userinput remap="install">tar -xf ../util-linux-man-pages-&util-linux-version;.tar.xz - -directory /usr/share/man - -strip-components=1</userinput></screen>
125-->
126 </sect2>
127
128 <!-- - - - - - - - - - -->
129 <!-- Multilib - 32bit -->
130 <!-- - - - - - - - - - -->
131
132 <sect2 arch="ml_32,ml_all" role="installation">
133 <title>Installation of Util-linux - 32-bit</title>
134
135 <para>Clean previous build:</para>
136
137<screen><userinput remap="pre">make distclean</userinput></screen>
138
139 <para>Move a tool out of the way which is optionally used by
140 configure but will report invalid pathes for multilib builds.</para>
141
142<screen><userinput remap="configure">mv /usr/bin/ncursesw6-config{,.tmp}</userinput></screen>
143
144 <para>Prepare Util-linux for compilation:</para>
145
146<screen revision="sysv"><userinput remap="configure">CC="gcc -m32" \
147./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
148 --host=i686-pc-linux-gnu \
149 --libdir=/usr/lib32 \
150 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
151 --disable-chfn-chsh \
152 --disable-login \
153 --disable-nologin \
154 --disable-su \
155 --disable-setpriv \
156 --disable-runuser \
157 --disable-pylibmount \
158 --disable-static \
159 --without-python \
160 --without-systemd \
161 --without-systemdsystemunitdir</userinput></screen>
162
163<screen revision="systemd"><userinput remap="configure">CC="gcc -m32" \
164./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
165 --host=i686-pc-linux-gnu \
166 --libdir=/usr/lib32 \
167 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
168 --disable-chfn-chsh \
169 --disable-login \
170 --disable-nologin \
171 --disable-su \
172 --disable-setpriv \
173 --disable-runuser \
174 --disable-pylibmount \
175 --disable-static \
176 --without-python</userinput></screen>
177
178 <para>Restore the tool previously moved away:</para>
179
180<screen><userinput remap="configure">mv /usr/bin/ncursesw6-config{.tmp,}</userinput></screen>
181
182 <para>Compile the package:</para>
183
184<screen><userinput remap="make">make</userinput></screen>
185
186 <para>Install the package:</para>
187
188<screen><userinput remap="install">make DESTDIR=$PWD/DESTDIR install
189cp -Rv DESTDIR/usr/lib32/* /usr/lib32
190rm -rf DESTDIR</userinput></screen>
191
192 </sect2><!-- m32 -->
193
194 <!-- - - - - - - - - - -->
195 <!-- Multilib - x32bit -->
196 <!-- - - - - - - - - - -->
197
198 <sect2 arch="ml_x32,ml_all" role="installation">
199 <title>Installation of Util-linux - x32-bit</title>
200
201 <para>Clean previous build:</para>
202
203<screen><userinput remap="pre">make distclean</userinput></screen>
204
205 <para>Move a tool out of the way which is optionally used by
206 configure but will report invalid pathes for multilib builds.</para>
207
208<screen><userinput remap="configure">mv /usr/bin/ncursesw6-config{,.tmp}</userinput></screen>
209
210 <para>Prepare Util-linux for compilation:</para>
211
212<screen revision="sysv"><userinput remap="configure">CC="gcc -mx32" \
213./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
214 --host=x86_64-pc-linux-gnux32 \
215 --libdir=/usr/libx32 \
216 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
217 --disable-chfn-chsh \
218 --disable-login \
219 --disable-nologin \
220 --disable-su \
221 --disable-setpriv \
222 --disable-runuser \
223 --disable-pylibmount \
224 --disable-static \
225 --without-python \
226 --without-systemd \
227 --without-systemdsystemunitdir</userinput></screen>
228
229<screen revision="systemd"><userinput remap="configure">CC="gcc -mx32" \
230./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
231 --host=x86_64-pc-linux-gnux32 \
232 --libdir=/usr/libx32 \
233 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
234 --disable-chfn-chsh \
235 --disable-login \
236 --disable-nologin \
237 --disable-su \
238 --disable-setpriv \
239 --disable-runuser \
240 --disable-pylibmount \
241 --disable-static \
242 --without-python</userinput></screen>
243
244 <para>Restore the tool previously moved away:</para>
245
246<screen><userinput remap="configure">mv /usr/bin/ncursesw6-config{.tmp,}</userinput></screen>
247
248 <para>Compile the package:</para>
249
250<screen><userinput remap="make">make</userinput></screen>
251
252 <para>Install the package:</para>
253
254<screen><userinput remap="install">make DESTDIR=$PWD/DESTDIR install
255cp -Rv DESTDIR/usr/libx32/* /usr/libx32
256rm -rf DESTDIR</userinput></screen>
257
258 </sect2><!-- mx32 -->
259
260 <sect2 id="contents-utillinux" role="content">
261 <title>Contents of Util-linux</title>
262
263 <segmentedlist>
264 <segtitle>Installed programs</segtitle>
265 <segtitle>Installed libraries</segtitle>
266 <segtitle>Installed directories</segtitle>
267
268 <seglistitem>
269 <seg>addpart, agetty, blkdiscard, blkid, blkzone, blockdev, cal, cfdisk, chcpu,
270 chmem, choom, chrt, col, colcrt, colrm, column, ctrlaltdel, delpart, dmesg,
271 eject, fallocate, fdisk, fincore, findfs, findmnt, flock, fsck,
272 fsck.cramfs, fsck.minix, fsfreeze, fstrim, getopt, hardlink, hexdump, hwclock,
273 i386 (link to setarch), ionice, ipcmk, ipcrm, ipcs, irqtop, isosize, kill, last,
274 lastb (link to last), ldattach, linux32 (link to setarch), linux64 (link to setarch),
275 logger, look, losetup, lsblk, lscpu, lsipc, lsirq, lsfd, lslocks, lslogins,
276 lsmem, lsns, mcookie, mesg, mkfs, mkfs.bfs, mkfs.cramfs, mkfs.minix, mkswap,
277 more, mount, mountpoint, namei, nsenter, partx, pivot_root, prlimit,
278 readprofile, rename, renice, resizepart, rev, rfkill, rtcwake, script,
279 scriptlive, scriptreplay, setarch, setsid, setterm, sfdisk, sulogin, swaplabel,
280 swapoff, swapon, switch_root, taskset, uclampset, ul,
281 umount, uname26 (link to setarch), unshare, utmpdump, uuidd, uuidgen, uuidparse,
282 wall, wdctl, whereis, wipefs, x86_64 (link to setarch), and zramctl</seg>
283 <seg>libblkid.so, libfdisk.so, libmount.so,
284 libsmartcols.so, and libuuid.so</seg>
285 <seg>/usr/include/blkid,
286 /usr/include/libfdisk,
287 /usr/include/libmount,
288 /usr/include/libsmartcols,
289 /usr/include/uuid,
290 /usr/share/doc/util-linux-&util-linux-version;,
291 and /var/lib/hwclock</seg>
292 </seglistitem>
293 </segmentedlist>
294
295 <variablelist>
296 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
297 <?dbfo list-presentation="list"?>
298 <?dbhtml list-presentation="table"?>
299
300 <varlistentry id="addpart">
301 <term><command>addpart</command></term>
302 <listitem>
303 <para>Informs the Linux kernel of new partitions</para>
304 <indexterm zone="ch-system-util-linux addpart">
305 <primary sortas="b-addpart">addpart</primary>
306 </indexterm>
307 </listitem>
308 </varlistentry>
309
310 <varlistentry id="agetty">
311 <term><command>agetty</command></term>
312 <listitem>
313 <para>Opens a tty port, prompts for a login name,
314 and then invokes the <command>login</command> program</para>
315 <indexterm zone="ch-system-util-linux agetty">
316 <primary sortas="b-agetty">agetty</primary>
317 </indexterm>
318 </listitem>
319 </varlistentry>
320
321 <varlistentry id="blkdiscard">
322 <term><command>blkdiscard</command></term>
323 <listitem>
324 <para>Discards sectors on a device</para>
325 <indexterm zone="ch-system-util-linux blkdiscard">
326 <primary sortas="b-blkdiscard">blkdiscard</primary>
327 </indexterm>
328 </listitem>
329 </varlistentry>
330
331 <varlistentry id="blkid">
332 <term><command>blkid</command></term>
333 <listitem>
334 <para>A command line utility to locate and print block device
335 attributes</para>
336 <indexterm zone="ch-system-util-linux blkid">
337 <primary sortas="b-blkid">blkid</primary>
338 </indexterm>
339 </listitem>
340 </varlistentry>
341
342 <varlistentry id="blkzone">
343 <term><command>blkzone</command></term>
344 <listitem>
345 <para>Is used to manage zoned storage block devices</para>
346 <indexterm zone="ch-system-util-linux blkzone">
347 <primary sortas="b-blkzone">blkzone</primary>
348 </indexterm>
349 </listitem>
350 </varlistentry>
351
352 <varlistentry id="blockdev">
353 <term><command>blockdev</command></term>
354 <listitem>
355 <para>Allows users to call block device ioctls from the command
356 line</para>
357 <indexterm zone="ch-system-util-linux blockdev">
358 <primary sortas="b-blockdev">blockdev</primary>
359 </indexterm>
360 </listitem>
361 </varlistentry>
362
363 <varlistentry id="cal">
364 <term><command>cal</command></term>
365 <listitem>
366 <para>Displays a simple calendar</para>
367 <indexterm zone="ch-system-util-linux cal">
368 <primary sortas="b-cal">cal</primary>
369 </indexterm>
370 </listitem>
371 </varlistentry>
372
373 <varlistentry id="cfdisk">
374 <term><command>cfdisk</command></term>
375 <listitem>
376 <para>Manipulates the partition table of the given device</para>
377 <indexterm zone="ch-system-util-linux cfdisk">
378 <primary sortas="b-cfdisk">cfdisk</primary>
379 </indexterm>
380 </listitem>
381 </varlistentry>
382
383 <varlistentry id="chcpu">
384 <term><command>chcpu</command></term>
385 <listitem>
386 <para>Modifies the state of CPUs</para>
387 <indexterm zone="ch-system-util-linux chcpu">
388 <primary sortas="b-chcpu">chcpu</primary>
389 </indexterm>
390 </listitem>
391 </varlistentry>
392
393 <varlistentry id="chmem">
394 <term><command>chmem</command></term>
395 <listitem>
396 <para>Configures memory</para>
397 <indexterm zone="ch-system-util-linux chmem">
398 <primary sortas="b-chmem">chmem</primary>
399 </indexterm>
400 </listitem>
401 </varlistentry>
402
403 <varlistentry id="choom">
404 <term><command>choom</command></term>
405 <listitem>
406 <para>Displays and adjusts OOM-killer scores, used to determine
407 which process to kill first when Linux is Out Of Memory</para>
408 <indexterm zone="ch-system-util-linux choom">
409 <primary sortas="b-choom">choom</primary>
410 </indexterm>
411 </listitem>
412 </varlistentry>
413
414 <varlistentry id="chrt">
415 <term><command>chrt</command></term>
416 <listitem>
417 <para>Manipulates real-time attributes of a process</para>
418 <indexterm zone="ch-system-util-linux chrt">
419 <primary sortas="b-chrt">chrt</primary>
420 </indexterm>
421 </listitem>
422 </varlistentry>
423
424 <varlistentry id="col">
425 <term><command>col</command></term>
426 <listitem>
427 <para>Filters out reverse line feeds</para>
428 <indexterm zone="ch-system-util-linux col">
429 <primary sortas="b-col">col</primary>
430 </indexterm>
431 </listitem>
432 </varlistentry>
433
434 <varlistentry id="colcrt">
435 <term><command>colcrt</command></term>
436 <listitem>
437 <para>Filters <command>nroff</command> output for terminals
438 that lack some capabilities, such as overstriking and half-lines</para>
439 <indexterm zone="ch-system-util-linux colcrt">
440 <primary sortas="b-colcrt">colcrt</primary>
441 </indexterm>
442 </listitem>
443 </varlistentry>
444
445 <varlistentry id="colrm">
446 <term><command>colrm</command></term>
447 <listitem>
448 <para>Filters out the given columns</para>
449 <indexterm zone="ch-system-util-linux colrm">
450 <primary sortas="b-colrm">colrm</primary>
451 </indexterm>
452 </listitem>
453 </varlistentry>
454
455 <varlistentry id="column">
456 <term><command>column</command></term>
457 <listitem>
458 <para>Formats a given file into multiple columns</para>
459 <indexterm zone="ch-system-util-linux column">
460 <primary sortas="b-column">column</primary>
461 </indexterm>
462 </listitem>
463 </varlistentry>
464
465 <varlistentry id="ctrlaltdel">
466 <term><command>ctrlaltdel</command></term>
467 <listitem>
468 <para>Sets the function of the Ctrl+Alt+Del key combination to a
469 hard or a soft reset</para>
470 <indexterm zone="ch-system-util-linux ctrlaltdel">
471 <primary sortas="b-ctrlaltdel">ctrlaltdel</primary>
472 </indexterm>
473 </listitem>
474 </varlistentry>
475
476 <varlistentry id="delpart">
477 <term><command>delpart</command></term>
478 <listitem>
479 <para>Asks the Linux kernel to remove a partition</para>
480 <indexterm zone="ch-system-util-linux delpart">
481 <primary sortas="b-delpart">delpart</primary>
482 </indexterm>
483 </listitem>
484 </varlistentry>
485
486 <varlistentry id="dmesg">
487 <term><command>dmesg</command></term>
488 <listitem>
489 <para>Dumps the kernel boot messages</para>
490 <indexterm zone="ch-system-util-linux dmesg">
491 <primary sortas="b-dmesg">dmesg</primary>
492 </indexterm>
493 </listitem>
494 </varlistentry>
495
496 <varlistentry id="eject">
497 <term><command>eject</command></term>
498 <listitem>
499 <para>Ejects removable media</para>
500 <indexterm zone="ch-system-util-linux eject">
501 <primary sortas="b-eject">eject</primary>
502 </indexterm>
503 </listitem>
504 </varlistentry>
505
506 <varlistentry id="fallocate">
507 <term><command>fallocate</command></term>
508 <listitem>
509 <para>Preallocates space to a file</para>
510 <indexterm zone="ch-system-util-linux fallocate">
511 <primary sortas="b-fallocate">fallocate</primary>
512 </indexterm>
513 </listitem>
514 </varlistentry>
515
516 <varlistentry id="fdisk">
517 <term><command>fdisk</command></term>
518 <listitem>
519 <para>Manipulates the partition table of the given device</para>
520 <indexterm zone="ch-system-util-linux fdisk">
521 <primary sortas="b-fdisk">fdisk</primary>
522 </indexterm>
523 </listitem>
524 </varlistentry>
525
526 <varlistentry id="fincore">
527 <term><command>fincore</command></term>
528 <listitem>
529 <para>Counts pages of file contents in core</para>
530 <indexterm zone="ch-system-util-linux fincore">
531 <primary sortas="b-fincore">fincore</primary>
532 </indexterm>
533 </listitem>
534 </varlistentry>
535
536 <varlistentry id="findfs">
537 <term><command>findfs</command></term>
538 <listitem>
539 <para>Finds a file system, either by label or Universally Unique Identifier
540 (UUID)</para>
541 <indexterm zone="ch-system-util-linux findfs">
542 <primary sortas="b-findfs">findfs</primary>
543 </indexterm>
544 </listitem>
545 </varlistentry>
546
547 <varlistentry id="findmnt">
548 <term><command>findmnt</command></term>
549 <listitem>
550 <para>Is a command line interface to the libmount library
551 for working with mountinfo, fstab and mtab files</para>
552 <indexterm zone="ch-system-util-linux findmnt">
553 <primary sortas="b-findmnt">findmnt</primary>
554 </indexterm>
555 </listitem>
556 </varlistentry>
557
558 <varlistentry id="flock">
559 <term><command>flock</command></term>
560 <listitem>
561 <para>Acquires a file lock and then executes a command with the lock
562 held</para>
563 <indexterm zone="ch-system-util-linux flock">
564 <primary sortas="b-flock">flock</primary>
565 </indexterm>
566 </listitem>
567 </varlistentry>
568
569 <varlistentry id="fsck">
570 <term><command>fsck</command></term>
571 <listitem>
572 <para>Is used to check, and optionally repair, file systems</para>
573 <indexterm zone="ch-system-util-linux fsck">
574 <primary sortas="b-fsck">fsck</primary>
575 </indexterm>
576 </listitem>
577 </varlistentry>
578
579 <varlistentry id="fsck.cramfs">
580 <term><command>fsck.cramfs</command></term>
581 <listitem>
582 <para>Performs a consistency check on the Cramfs file system on the
583 given device</para>
584 <indexterm zone="ch-system-util-linux fsck.cramfs">
585 <primary sortas="b-fsck.cramfs">fsck.cramfs</primary>
586 </indexterm>
587 </listitem>
588 </varlistentry>
589
590 <varlistentry id="fsck.minix">
591 <term><command>fsck.minix</command></term>
592 <listitem>
593 <para>Performs a consistency check on the Minix file system on the
594 given device</para>
595 <indexterm zone="ch-system-util-linux fsck.minix">
596 <primary sortas="b-fsck.minix">fsck.minix</primary>
597 </indexterm>
598 </listitem>
599 </varlistentry>
600
601 <varlistentry id="fsfreeze">
602 <term><command>fsfreeze</command></term>
603 <listitem>
604 <para>Is a very simple wrapper around FIFREEZE/FITHAW ioctl
605 kernel driver operations</para>
606 <indexterm zone="ch-system-util-linux fsfreeze">
607 <primary sortas="b-fsfreeze">fsfreeze</primary>
608 </indexterm>
609 </listitem>
610 </varlistentry>
611
612 <varlistentry id="fstrim">
613 <term><command>fstrim</command></term>
614 <listitem>
615 <para>Discards unused blocks on a mounted filesystem</para>
616 <indexterm zone="ch-system-util-linux fstrim">
617 <primary sortas="b-fstrim">fstrim</primary>
618 </indexterm>
619 </listitem>
620 </varlistentry>
621
622 <varlistentry id="getopt">
623 <term><command>getopt</command></term>
624 <listitem>
625 <para>Parses options in the given command line</para>
626 <indexterm zone="ch-system-util-linux getopt">
627 <primary sortas="b-getopt">getopt</primary>
628 </indexterm>
629 </listitem>
630 </varlistentry>
631
632 <varlistentry id="hardlink">
633 <term><command>hardlink</command></term>
634 <listitem>
635 <para>Consolidates duplicate files by creating hard links</para>
636 <indexterm zone="ch-system-util-linux hardlink">
637 <primary sortas="b-hardlink">hardlink</primary>
638 </indexterm>
639 </listitem>
640 </varlistentry>
641
642 <varlistentry id="hexdump">
643 <term><command>hexdump</command></term>
644 <listitem>
645 <para>Dumps the given file in hexadecimal, decimal, octal,
646 or ascii</para>
647 <indexterm zone="ch-system-util-linux hexdump">
648 <primary sortas="b-hexdump">hexdump</primary>
649 </indexterm>
650 </listitem>
651 </varlistentry>
652
653 <varlistentry id="hwclock">
654 <term><command>hwclock</command></term>
655 <listitem>
656 <para>Reads or sets the system's hardware clock, also called
657 the Real-Time Clock (RTC) or Basic Input-Output System (BIOS)
658 clock</para>
659 <indexterm zone="ch-system-util-linux hwclock">
660 <primary sortas="b-hwclock">hwclock</primary>
661 </indexterm>
662 </listitem>
663 </varlistentry>
664
665 <varlistentry id="i386">
666 <term><command>i386</command></term>
667 <listitem>
668 <para>A symbolic link to setarch</para>
669 <indexterm zone="ch-system-util-linux i386">
670 <primary sortas="b-i386">i386</primary>
671 </indexterm>
672 </listitem>
673 </varlistentry>
674
675 <varlistentry id="ionice">
676 <term><command>ionice</command></term>
677 <listitem>
678 <para>Gets or sets the io scheduling class and priority for a program</para>
679 <indexterm zone="ch-system-util-linux ionice">
680 <primary sortas="b-ionice">ionice</primary>
681 </indexterm>
682 </listitem>
683 </varlistentry>
684
685 <varlistentry id="ipcmk">
686 <term><command>ipcmk</command></term>
687 <listitem>
688 <para>Creates various IPC resources</para>
689 <indexterm zone="ch-system-util-linux ipcmk">
690 <primary sortas="b-ipcmk">ipcmk</primary>
691 </indexterm>
692 </listitem>
693 </varlistentry>
694
695 <varlistentry id="ipcrm">
696 <term><command>ipcrm</command></term>
697 <listitem>
698 <para>Removes the given Inter-Process Communication (IPC) resource</para>
699 <indexterm zone="ch-system-util-linux ipcrm">
700 <primary sortas="b-ipcrm">ipcrm</primary>
701 </indexterm>
702 </listitem>
703 </varlistentry>
704
705 <varlistentry id="ipcs">
706 <term><command>ipcs</command></term>
707 <listitem>
708 <para>Provides IPC status information</para>
709 <indexterm zone="ch-system-util-linux ipcs">
710 <primary sortas="b-ipcs">ipcs</primary>
711 </indexterm>
712 </listitem>
713 </varlistentry>
714
715 <varlistentry id="irqtop">
716 <term><command>irqtop</command></term>
717 <listitem>
718 <para>Displays kernel interrupt counter information in
719 <filename>top(1)</filename> style view</para>
720 <indexterm zone="ch-system-util-linux irqtop">
721 <primary sortas="b-irqtop">irqtop</primary>
722 </indexterm>
723 </listitem>
724 </varlistentry>
725
726 <varlistentry id="isosize">
727 <term><command>isosize</command></term>
728 <listitem>
729 <para>Reports the size of an iso9660 file system</para>
730 <indexterm zone="ch-system-util-linux isosize">
731 <primary sortas="b-isosize">isosize</primary>
732 </indexterm>
733 </listitem>
734 </varlistentry>
735
736 <varlistentry id="kill">
737 <term><command>kill</command></term>
738 <listitem>
739 <para>Sends signals to processes</para>
740 <indexterm zone="ch-system-util-linux kill">
741 <primary sortas="b-kill">kill</primary>
742 </indexterm>
743 </listitem>
744 </varlistentry>
745
746 <varlistentry id="last">
747 <term><command>last</command></term>
748 <listitem>
749 <para>Shows which users last logged in (and out), searching back
750 through the <filename>/var/log/wtmp</filename> file; it also shows
751 system boots, shutdowns, and run-level changes</para>
752 <indexterm zone="ch-system-util-linux last">
753 <primary sortas="b-last">last</primary>
754 </indexterm>
755 </listitem>
756 </varlistentry>
757
758 <varlistentry id="lastb">
759 <term><command>lastb</command></term>
760 <listitem>
761 <para>Shows the failed login attempts, as logged in
762 <filename>/var/log/btmp</filename></para>
763 <indexterm zone="ch-system-util-linux lastb">
764 <primary sortas="b-lastb">lastb</primary>
765 </indexterm>
766 </listitem>
767 </varlistentry>
768
769 <varlistentry id="ldattach">
770 <term><command>ldattach</command></term>
771 <listitem>
772 <para>Attaches a line discipline to a serial line</para>
773 <indexterm zone="ch-system-util-linux ldattach">
774 <primary sortas="b-ldattach">ldattach</primary>
775 </indexterm>
776 </listitem>
777 </varlistentry>
778
779 <varlistentry id="linux32">
780 <term><command>linux32</command></term>
781 <listitem>
782 <para>A symbolic link to setarch</para>
783 <indexterm zone="ch-system-util-linux linux32">
784 <primary sortas="b-linux32">linux32</primary>
785 </indexterm>
786 </listitem>
787 </varlistentry>
788
789 <varlistentry id="linux64">
790 <term><command>linux64</command></term>
791 <listitem>
792 <para>A symbolic link to setarch</para>
793 <indexterm zone="ch-system-util-linux linux64">
794 <primary sortas="b-linux64">linux64</primary>
795 </indexterm>
796 </listitem>
797 </varlistentry>
798
799 <varlistentry id="logger">
800 <term><command>logger</command></term>
801 <listitem>
802 <para>Enters the given message into the system log</para>
803 <indexterm zone="ch-system-util-linux logger">
804 <primary sortas="b-logger">logger</primary>
805 </indexterm>
806 </listitem>
807 </varlistentry>
808
809 <varlistentry id="look">
810 <term><command>look</command></term>
811 <listitem>
812 <para>Displays lines that begin with the given string</para>
813 <indexterm zone="ch-system-util-linux look">
814 <primary sortas="b-look">look</primary>
815 </indexterm>
816 </listitem>
817 </varlistentry>
818
819 <varlistentry id="losetup">
820 <term><command>losetup</command></term>
821 <listitem>
822 <para>Sets up and controls loop devices</para>
823 <indexterm zone="ch-system-util-linux losetup">
824 <primary sortas="b-losetup">losetup</primary>
825 </indexterm>
826 </listitem>
827 </varlistentry>
828
829 <varlistentry id="lsblk">
830 <term><command>lsblk</command></term>
831 <listitem>
832 <para>Lists information about all or selected block devices in
833 a tree-like format</para>
834 <indexterm zone="ch-system-util-linux lsblk">
835 <primary sortas="b-lsblk">lsblk</primary>
836 </indexterm>
837 </listitem>
838 </varlistentry>
839
840 <varlistentry id="lscpu">
841 <term><command>lscpu</command></term>
842 <listitem>
843 <para>Prints CPU architecture information</para>
844 <indexterm zone="ch-system-util-linux lscpu">
845 <primary sortas="b-lscpu">lscpu</primary>
846 </indexterm>
847 </listitem>
848 </varlistentry>
849
850 <varlistentry id="lsfd">
851 <term><command>lsfd</command></term>
852 <listitem>
853 <para>Displays information about open files; replaces <command>lsof</command></para>
854 <indexterm zone="ch-system-util-linux lsfd">
855 <primary sortas="b-lsfd">lsfd</primary>
856 </indexterm>
857 </listitem>
858 </varlistentry>
859
860 <varlistentry id="lsipc">
861 <term><command>lsipc</command></term>
862 <listitem>
863 <para>Prints information on IPC facilities currently employed
864 in the system</para>
865 <indexterm zone="ch-system-util-linux lsipc">
866 <primary sortas="b-lsipc">lsipc</primary>
867 </indexterm>
868 </listitem>
869 </varlistentry>
870
871 <varlistentry id="lsirq">
872 <term><command>lsirq</command></term>
873 <listitem>
874 <para>Displays kernel interrupt counter information</para>
875 <indexterm zone="ch-system-util-linux lsirq">
876 <primary sortas="b-lsirq">lsirq</primary>
877 </indexterm>
878 </listitem>
879 </varlistentry>
880
881 <varlistentry id="lslocks">
882 <term><command>lslocks</command></term>
883 <listitem>
884 <para>Lists local system locks</para>
885 <indexterm zone="ch-system-util-linux lslocks">
886 <primary sortas="b-lslocks">lslocks</primary>
887 </indexterm>
888 </listitem>
889 </varlistentry>
890
891 <varlistentry id="lslogins">
892 <term><command>lslogins</command></term>
893 <listitem>
894 <para>Lists information about users, groups and system accounts</para>
895 <indexterm zone="ch-system-util-linux lslogins">
896 <primary sortas="b-lslogins">lslogins</primary>
897 </indexterm>
898 </listitem>
899 </varlistentry>
900
901 <varlistentry id="lsmem">
902 <term><command>lsmem</command></term>
903 <listitem>
904 <para>Lists the ranges of available memory with their online
905 status</para>
906 <indexterm zone="ch-system-util-linux lsmem">
907 <primary sortas="b-lsmem">lsmem</primary>
908 </indexterm>
909 </listitem>
910 </varlistentry>
911
912 <varlistentry id="lsns">
913 <term><command>lsns</command></term>
914 <listitem>
915 <para>Lists namespaces</para>
916 <indexterm zone="ch-system-util-linux lsns">
917 <primary sortas="b-lsns">lsns</primary>
918 </indexterm>
919 </listitem>
920 </varlistentry>
921
922 <varlistentry id="mcookie">
923 <term><command>mcookie</command></term>
924 <listitem>
925 <para>Generates magic cookies (128-bit random hexadecimal numbers) for
926 <command>xauth</command></para>
927 <indexterm zone="ch-system-util-linux mcookie">
928 <primary sortas="b-mcookie">mcookie</primary>
929 </indexterm>
930 </listitem>
931 </varlistentry>
932
933 <varlistentry id="mesg">
934 <term><command>mesg</command></term>
935 <listitem>
936 <para>Controls whether other users can send messages to the current
937 user's terminal</para>
938 <indexterm zone="ch-system-util-linux mesg">
939 <primary sortas="b-mesg">mesg</primary>
940 </indexterm>
941 </listitem>
942 </varlistentry>
943
944 <varlistentry id="mkfs">
945 <term><command>mkfs</command></term>
946 <listitem>
947 <para>Builds a file system on a device (usually a hard disk
948 partition)</para>
949 <indexterm zone="ch-system-util-linux mkfs">
950 <primary sortas="b-mkfs">mkfs</primary>
951 </indexterm>
952 </listitem>
953 </varlistentry>
954
955 <varlistentry id="mkfs.bfs">
956 <term><command>mkfs.bfs</command></term>
957 <listitem>
958 <para>Creates a Santa Cruz Operations (SCO) bfs file system</para>
959 <indexterm zone="ch-system-util-linux mkfs.bfs">
960 <primary sortas="b-mkfs.bfs">mkfs.bfs</primary>
961 </indexterm>
962 </listitem>
963 </varlistentry>
964
965 <varlistentry id="mkfs.cramfs">
966 <term><command>mkfs.cramfs</command></term>
967 <listitem>
968 <para>Creates a cramfs file system</para>
969 <indexterm zone="ch-system-util-linux mkfs.cramfs">
970 <primary sortas="b-mkfs.cramfs">mkfs.cramfs</primary>
971 </indexterm>
972 </listitem>
973 </varlistentry>
974
975 <varlistentry id="mkfs.minix">
976 <term><command>mkfs.minix</command></term>
977 <listitem>
978 <para>Creates a Minix file system</para>
979 <indexterm zone="ch-system-util-linux mkfs.minix">
980 <primary sortas="b-mkfs.minix">mkfs.minix</primary>
981 </indexterm>
982 </listitem>
983 </varlistentry>
984
985 <varlistentry id="mkswap">
986 <term><command>mkswap</command></term>
987 <listitem>
988 <para>Initializes the given device or file to be used as a swap
989 area</para>
990 <indexterm zone="ch-system-util-linux mkswap">
991 <primary sortas="b-mkswap">mkswap</primary>
992 </indexterm>
993 </listitem>
994 </varlistentry>
995
996 <varlistentry id="more">
997 <term><command>more</command></term>
998 <listitem>
999 <para>A filter for paging through text one screen at a time</para>
1000 <indexterm zone="ch-system-util-linux more">
1001 <primary sortas="b-more">more</primary>
1002 </indexterm>
1003 </listitem>
1004 </varlistentry>
1005
1006 <varlistentry id="mount">
1007 <term><command>mount</command></term>
1008 <listitem>
1009 <para>Attaches the file system on the given device to a specified
1010 directory in the file-system tree</para>
1011 <indexterm zone="ch-system-util-linux mount">
1012 <primary sortas="b-mount">mount</primary>
1013 </indexterm>
1014 </listitem>
1015 </varlistentry>
1016
1017 <varlistentry id="mountpoint">
1018 <term><command>mountpoint</command></term>
1019 <listitem>
1020 <para>Checks if the directory is a mountpoint</para>
1021 <indexterm zone="ch-system-util-linux mountpoint">
1022 <primary sortas="b-mountpoint">mountpoint</primary>
1023 </indexterm>
1024 </listitem>
1025 </varlistentry>
1026
1027 <varlistentry id="namei">
1028 <term><command>namei</command></term>
1029 <listitem>
1030 <para>Shows the symbolic links in the given paths</para>
1031 <indexterm zone="ch-system-util-linux namei">
1032 <primary sortas="b-namei">namei</primary>
1033 </indexterm>
1034 </listitem>
1035 </varlistentry>
1036
1037 <varlistentry id="nsenter">
1038 <term><command>nsenter</command></term>
1039 <listitem>
1040 <para>Runs a program with namespaces of other processes</para>
1041 <indexterm zone="ch-system-util-linux nsenter">
1042 <primary sortas="b-nsenter">nsenter</primary>
1043 </indexterm>
1044 </listitem>
1045 </varlistentry>
1046
1047 <varlistentry id="partx">
1048 <term><command>partx</command></term>
1049 <listitem>
1050 <para>Tells the kernel about the presence and numbering of on-disk
1051 partitions</para>
1052 <indexterm zone="ch-system-util-linux partx">
1053 <primary sortas="b-partx">partx</primary>
1054 </indexterm>
1055 </listitem>
1056 </varlistentry>
1057
1058 <varlistentry id="pivot_root">
1059 <term><command>pivot_root</command></term>
1060 <listitem>
1061 <para>Makes the given file system the new root file system of the
1062 current process</para>
1063 <indexterm zone="ch-system-util-linux pivot_root">
1064 <primary sortas="b-pivot_root">pivot_root</primary>
1065 </indexterm>
1066 </listitem>
1067 </varlistentry>
1068
1069 <varlistentry id="prlimit">
1070 <term><command>prlimit</command></term>
1071 <listitem>
1072 <para>Gets and sets a process's resource limits</para>
1073 <indexterm zone="ch-system-util-linux prlimit">
1074 <primary sortas="b-prlimit">prlimit</primary>
1075 </indexterm>
1076 </listitem>
1077 </varlistentry>
1078
1079 <varlistentry id="readprofile">
1080 <term><command>readprofile</command></term>
1081 <listitem>
1082 <para>Reads kernel profiling information</para>
1083 <indexterm zone="ch-system-util-linux readprofile">
1084 <primary sortas="b-readprofile">readprofile</primary>
1085 </indexterm>
1086 </listitem>
1087 </varlistentry>
1088
1089 <varlistentry id="rename">
1090 <term><command>rename</command></term>
1091 <listitem>
1092 <para>Renames the given files, replacing a given string with
1093 another</para>
1094 <indexterm zone="ch-system-util-linux rename">
1095 <primary sortas="b-rename">rename</primary>
1096 </indexterm>
1097 </listitem>
1098 </varlistentry>
1099
1100 <varlistentry id="renice">
1101 <term><command>renice</command></term>
1102 <listitem>
1103 <para>Alters the priority of running processes</para>
1104 <indexterm zone="ch-system-util-linux renice">
1105 <primary sortas="b-renice">renice</primary>
1106 </indexterm>
1107 </listitem>
1108 </varlistentry>
1109
1110 <varlistentry id="resizepart">
1111 <term><command>resizepart</command></term>
1112 <listitem>
1113 <para>Asks the Linux kernel to resize a partition</para>
1114 <indexterm zone="ch-system-util-linux resizepart">
1115 <primary sortas="b-resizepart">resizepart</primary>
1116 </indexterm>
1117 </listitem>
1118 </varlistentry>
1119
1120 <varlistentry id="rev">
1121 <term><command>rev</command></term>
1122 <listitem>
1123 <para>Reverses the lines of a given file</para>
1124 <indexterm zone="ch-system-util-linux rev">
1125 <primary sortas="b-rev">rev</primary>
1126 </indexterm>
1127 </listitem>
1128 </varlistentry>
1129
1130 <varlistentry id="rfkill">
1131 <term><command>rfkill</command></term>
1132 <listitem>
1133 <para>Tool for enabling and disabling wireless devices</para>
1134 <indexterm zone="ch-system-util-linux rfkill">
1135 <primary sortas="b-rfkill">rfkill</primary>
1136 </indexterm>
1137 </listitem>
1138 </varlistentry>
1139
1140 <varlistentry id="rtcwake">
1141 <term><command>rtcwake</command></term>
1142 <listitem>
1143 <para>Used to enter a system sleep state until the specified wakeup
1144 time</para>
1145 <indexterm zone="ch-system-util-linux rtcwake">
1146 <primary sortas="b-rtcwake">rtcwake</primary>
1147 </indexterm>
1148 </listitem>
1149 </varlistentry>
1150
1151 <varlistentry id="script">
1152 <term><command>script</command></term>
1153 <listitem>
1154 <para>Makes a typescript of a terminal session</para>
1155 <indexterm zone="ch-system-util-linux script">
1156 <primary sortas="b-script">script</primary>
1157 </indexterm>
1158 </listitem>
1159 </varlistentry>
1160
1161 <varlistentry id="scriptlive">
1162 <term><command>scriptlive</command></term>
1163 <listitem>
1164 <para>Re-runs session typescripts using timing information</para>
1165 <indexterm zone="ch-system-util-linux scriptlive">
1166 <primary sortas="b-scriptlive">scriptlive</primary>
1167 </indexterm>
1168 </listitem>
1169 </varlistentry>
1170
1171 <varlistentry id="scriptreplay">
1172 <term><command>scriptreplay</command></term>
1173 <listitem>
1174 <para>Plays back typescripts using timing information</para>
1175 <indexterm zone="ch-system-util-linux scriptreplay">
1176 <primary sortas="b-scriptreplay">scriptreplay</primary>
1177 </indexterm>
1178 </listitem>
1179 </varlistentry>
1180
1181 <varlistentry id="setarch">
1182 <term><command>setarch</command></term>
1183 <listitem>
1184 <para>Changes reported architecture in a new program environment, and
1185 sets personality flags</para>
1186 <indexterm zone="ch-system-util-linux setarch">
1187 <primary sortas="b-setarch">setarch</primary>
1188 </indexterm>
1189 </listitem>
1190 </varlistentry>
1191
1192 <varlistentry id="setsid">
1193 <term><command>setsid</command></term>
1194 <listitem>
1195 <para>Runs the given program in a new session</para>
1196 <indexterm zone="ch-system-util-linux setsid">
1197 <primary sortas="b-setsid">setsid</primary>
1198 </indexterm>
1199 </listitem>
1200 </varlistentry>
1201
1202 <varlistentry id="setterm">
1203 <term><command>setterm</command></term>
1204 <listitem>
1205 <para>Sets terminal attributes</para>
1206 <indexterm zone="ch-system-util-linux setterm">
1207 <primary sortas="b-setterm">setterm</primary>
1208 </indexterm>
1209 </listitem>
1210 </varlistentry>
1211
1212 <varlistentry id="sfdisk">
1213 <term><command>sfdisk</command></term>
1214 <listitem>
1215 <para>A disk partition table manipulator</para>
1216 <indexterm zone="ch-system-util-linux sfdisk">
1217 <primary sortas="b-sfdisk">sfdisk</primary>
1218 </indexterm>
1219 </listitem>
1220 </varlistentry>
1221
1222 <varlistentry id="sulogin">
1223 <term><command>sulogin</command></term>
1224 <listitem>
1225 <para>Allows <systemitem class="username">root</systemitem> to log in;
1226 it is normally invoked by <command>init</command> when the system goes
1227 into single user mode</para>
1228 <indexterm zone="ch-system-util-linux sulogin">
1229 <primary sortas="b-sulogin">sulogin</primary>
1230 </indexterm>
1231 </listitem>
1232 </varlistentry>
1233
1234 <varlistentry id="swaplabel">
1235 <term><command>swaplabel</command></term>
1236 <listitem>
1237 <para>Makes changes to the swap area's UUID and label</para>
1238 <indexterm zone="ch-system-util-linux swaplabel">
1239 <primary sortas="b-swaplabel">swaplabel</primary>
1240 </indexterm>
1241 </listitem>
1242 </varlistentry>
1243
1244 <varlistentry id="swapoff">
1245 <term><command>swapoff</command></term>
1246 <listitem>
1247 <para>Disables devices and files for paging and swapping</para>
1248 <indexterm zone="ch-system-util-linux swapoff">
1249 <primary sortas="b-swapoff">swapoff</primary>
1250 </indexterm>
1251 </listitem>
1252 </varlistentry>
1253
1254 <varlistentry id="swapon">
1255 <term><command>swapon</command></term>
1256 <listitem>
1257 <para>Enables devices and files for paging and swapping, and
1258 lists the devices and files currently in use</para>
1259 <indexterm zone="ch-system-util-linux swapon">
1260 <primary sortas="b-swapon">swapon</primary>
1261 </indexterm>
1262 </listitem>
1263 </varlistentry>
1264
1265 <varlistentry id="switch_root">
1266 <term><command>switch_root</command></term>
1267 <listitem>
1268 <para>Switches to another filesystem as the root of the mount tree</para>
1269 <indexterm zone="ch-system-util-linux switch_root">
1270 <primary sortas="b-switch_root">switch_root</primary>
1271 </indexterm>
1272 </listitem>
1273 </varlistentry>
1274
1275 <varlistentry id="taskset">
1276 <term><command>taskset</command></term>
1277 <listitem>
1278 <para>Retrieves or sets a process's CPU affinity</para>
1279 <indexterm zone="ch-system-util-linux taskset">
1280 <primary sortas="b-taskset">taskset</primary>
1281 </indexterm>
1282 </listitem>
1283 </varlistentry>
1284
1285 <varlistentry id="uclampset">
1286 <term><command>uclampset</command></term>
1287 <listitem>
1288 <para>Manipulates the utilization clamping attributes of the
1289 system or a process</para>
1290 <indexterm zone="ch-system-util-linux uclampset">
1291 <primary sortas="b-uclampset">uclampset</primary>
1292 </indexterm>
1293 </listitem>
1294 </varlistentry>
1295
1296 <varlistentry id="ul">
1297 <term><command>ul</command></term>
1298 <listitem>
1299 <para>A filter for translating underscores into escape sequences
1300 indicating underlining for the terminal in use</para>
1301 <indexterm zone="ch-system-util-linux ul">
1302 <primary sortas="b-ul">ul</primary>
1303 </indexterm>
1304 </listitem>
1305 </varlistentry>
1306
1307 <varlistentry id="umount">
1308 <term><command>umount</command></term>
1309 <listitem>
1310 <para>Disconnects a file system from the system's file tree</para>
1311 <indexterm zone="ch-system-util-linux umount">
1312 <primary sortas="b-umount">umount</primary>
1313 </indexterm>
1314 </listitem>
1315 </varlistentry>
1316
1317 <varlistentry id="uname26">
1318 <term><command>uname26</command></term>
1319 <listitem>
1320 <para>A symbolic link to setarch</para>
1321 <indexterm zone="ch-system-util-linux uname26">
1322 <primary sortas="b-uname26">uname26</primary>
1323 </indexterm>
1324 </listitem>
1325 </varlistentry>
1326
1327 <varlistentry id="unshare">
1328 <term><command>unshare</command></term>
1329 <listitem>
1330 <para>Runs a program with some namespaces unshared from parent</para>
1331 <indexterm zone="ch-system-util-linux unshare">
1332 <primary sortas="b-unshare">unshare</primary>
1333 </indexterm>
1334 </listitem>
1335 </varlistentry>
1336
1337 <varlistentry id="utmpdump">
1338 <term><command>utmpdump</command></term>
1339 <listitem>
1340 <para>Displays the content of the given login file in a
1341 user-friendly format</para>
1342 <indexterm zone="ch-system-util-linux utmpdump">
1343 <primary sortas="b-utmpdump">utmpdump</primary>
1344 </indexterm>
1345 </listitem>
1346 </varlistentry>
1347
1348 <varlistentry id="uuidd">
1349 <term><command>uuidd</command></term>
1350 <listitem>
1351 <para>A daemon used by the UUID library to generate time-based
1352 UUIDs in a secure and guaranteed-unique fashion</para>
1353 <indexterm zone="ch-system-util-linux uuidd">
1354 <primary sortas="b-uuidd">uuidd</primary>
1355 </indexterm>
1356 </listitem>
1357 </varlistentry>
1358
1359 <varlistentry id="uuidgen">
1360 <term><command>uuidgen</command></term>
1361 <listitem>
1362 <para>Creates new UUIDs. Each new UUID is a random number likely to be
1363 unique among all UUIDs created, on the local system and on other
1364 systems, in the past and in the future, with extremely high
1365 probability (2<superscript>128</superscript> UUIDs are
1366 possible)</para>
1367 <indexterm zone="ch-system-util-linux uuidgen">
1368 <primary sortas="b-uuidgen">uuidgen</primary>
1369 </indexterm>
1370 </listitem>
1371 </varlistentry>
1372
1373 <varlistentry id="uuidparse">
1374 <term><command>uuidparse</command></term>
1375 <listitem>
1376 <para>A utility to parse unique identifiers</para>
1377 <indexterm zone="ch-system-util-linux uuidparse">
1378 <primary sortas="b-uuidparse">uuidparse</primary>
1379 </indexterm>
1380 </listitem>
1381 </varlistentry>
1382
1383 <varlistentry id="wall">
1384 <term><command>wall</command></term>
1385 <listitem>
1386 <para>Displays the contents of a file or, by default, its standard
1387 input, on the terminals of all currently logged in users</para>
1388 <indexterm zone="ch-system-util-linux wall">
1389 <primary sortas="b-wall">wall</primary>
1390 </indexterm>
1391 </listitem>
1392 </varlistentry>
1393
1394 <varlistentry id="wdctl">
1395 <term><command>wdctl</command></term>
1396 <listitem>
1397 <para>Shows hardware watchdog status</para>
1398 <indexterm zone="ch-system-util-linux wdctl">
1399 <primary sortas="b-wdctl">wdctl</primary>
1400 </indexterm>
1401 </listitem>
1402 </varlistentry>
1403
1404 <varlistentry id="whereis">
1405 <term><command>whereis</command></term>
1406 <listitem>
1407 <para>Reports the location of the binary, source, and man page
1408 files for the given command</para>
1409 <indexterm zone="ch-system-util-linux whereis">
1410 <primary sortas="b-whereis">whereis</primary>
1411 </indexterm>
1412 </listitem>
1413 </varlistentry>
1414
1415 <varlistentry id="wipefs">
1416 <term><command>wipefs</command></term>
1417 <listitem>
1418 <para>Wipes a filesystem signature from a device</para>
1419 <indexterm zone="ch-system-util-linux wipefs">
1420 <primary sortas="b-wipefs">wipefs</primary>
1421 </indexterm>
1422 </listitem>
1423 </varlistentry>
1424
1425 <varlistentry id="x86_64">
1426 <term><command>x86_64</command></term>
1427 <listitem>
1428 <para>A symbolic link to setarch</para>
1429 <indexterm zone="ch-system-util-linux x86_64">
1430 <primary sortas="b-x86_64">x86_64</primary>
1431 </indexterm>
1432 </listitem>
1433 </varlistentry>
1434
1435 <varlistentry id="zramctl">
1436 <term><command>zramctl</command></term>
1437 <listitem>
1438 <para>A program to set up and control zram (compressed ram disk)
1439 devices</para>
1440 <indexterm zone="ch-system-util-linux zramctl">
1441 <primary sortas="b-zramctl">zramctl</primary>
1442 </indexterm>
1443 </listitem>
1444 </varlistentry>
1445
1446 <varlistentry id="libblkid">
1447 <term><filename class="libraryfile">libblkid</filename></term>
1448 <listitem>
1449 <para>Contains routines for device identification and token
1450 extraction</para>
1451 <indexterm zone="ch-system-util-linux libblkid">
1452 <primary sortas="c-libblkid">libblkid</primary>
1453 </indexterm>
1454 </listitem>
1455 </varlistentry>
1456
1457 <varlistentry id="libfdisk">
1458 <term><filename class="libraryfile">libfdisk</filename></term>
1459 <listitem>
1460 <para>Contains routines for manipulating partition tables</para>
1461 <indexterm zone="ch-system-util-linux libfdisk">
1462 <primary sortas="c-libfdisk">libfdisk</primary>
1463 </indexterm>
1464 </listitem>
1465 </varlistentry>
1466
1467 <varlistentry id="libmount">
1468 <term><filename class="libraryfile">libmount</filename></term>
1469 <listitem>
1470 <para>Contains routines for block device mounting and
1471 unmounting</para>
1472 <indexterm zone="ch-system-util-linux libmount">
1473 <primary sortas="c-libmount">libmount</primary>
1474 </indexterm>
1475 </listitem>
1476 </varlistentry>
1477
1478 <varlistentry id="libsmartcols">
1479 <term><filename class="libraryfile">libsmartcols</filename></term>
1480 <listitem>
1481 <para>Contains routines for aiding screen output in tabular form</para>
1482 <indexterm zone="ch-system-util-linux libsmartcols">
1483 <primary sortas="c-libsmartcols">libsmartcols</primary>
1484 </indexterm>
1485 </listitem>
1486 </varlistentry>
1487
1488 <varlistentry id="libuuid">
1489 <term><filename class="libraryfile">libuuid</filename></term>
1490 <listitem>
1491 <para>Contains routines for generating unique identifiers for objects
1492 that may be accessible beyond the local system</para>
1493 <indexterm zone="ch-system-util-linux libuuid">
1494 <primary sortas="c-libuuid">libuuid</primary>
1495 </indexterm>
1496 </listitem>
1497 </varlistentry>
1498
1499 </variablelist>
1500
1501 </sect2>
1502
1503</sect1>
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