source: chapter06/util-linux.xml@ 6c4092b0

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Last change on this file since 6c4092b0 was 6c4092b0, checked in by Bruce Dubbs <bdubbs@…>, 11 years ago

Update to gcc-4.8.1
Update to util-linux-2.23.1

Added test suites to util-linux, but needed to move shadow
before util-linux to have su available.

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@10290 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

  • Property mode set to 100644
File size: 38.8 KB
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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-ch6-sbu;</seg>
36 <seg>&util-linux-ch6-du;</seg>
37 </seglistitem>
38 </segmentedlist>
39
40 </sect2>
41
42 <sect2 role="installation">
43 <title>FHS compliance notes</title>
44
45 <para>The FHS recommends using the <filename
46 class="directory">/var/lib/hwclock</filename> directory instead of the
47 usual <filename class="directory">/etc</filename> directory as the
48 location for the <filename>adjtime</filename> file. To make the
49 <command>hwclock</command> program FHS-compliant, run the
50 following:</para>
51
52<screen><userinput remap="pre">sed -i -e 's@etc/adjtime@var/lib/hwclock/adjtime@g' \
53 $(grep -rl '/etc/adjtime' .)
54
55mkdir -pv /var/lib/hwclock</userinput></screen>
56
57 </sect2>
58
59 <sect2 role="installation">
60 <title>Installation of Util-linux</title>
61
62<screen><userinput remap="configure">./configure --disable-su --disable-sulogin --disable-login</userinput></screen>
63
64 <variablelist>
65 <title>The meaning of the configure option:</title>
66
67 <varlistentry>
68 <term><parameter>--disable-*</parameter></term>
69 <listitem>
70 <para>These switches disable building su, sulogin, and login. They
71 duplicate the same programs provided by <xref
72 linkend='ch-system-shadow'/> and <xref linkend='ch-system-sysvinit'/>.
73 They also require
74 <ulink url="&blfs-root;/view/svn/postlfs/linux-pam.html">Linux-PAM</ulink>
75 which is not available in LFS.</para>
76 </listitem>
77 </varlistentry>
78 </variablelist>
79
80 <para>Compile the package:</para>
81
82<screen><userinput remap="make">make</userinput></screen>
83
84 <para>If desired, run the test suite as a non-root user:</para>
85
86 <warning><para>Running the test suite as the root user can be harmful to
87 your system. To run it, the kernel CONFIG_SCSI_DEBUG option for the
88 kernel must be available in the currently running system. For complete
89 coverage, other BLFS packages must be installed. If desired, this
90 test can be run after rebooting into the completed LFS system and running:</para>
91
92 <screen role="nodump"><userinput>bash tests/run.sh --srcdir=$PWD --builddir=$PWD</userinput></screen>
93 </warning>
94
95 <screen><userinput remap="test">chown -Rv nobody .
96su nobody -s /bin/bash -c "PATH=$PATH make check"</userinput></screen>
97
98 <para>Install the package:</para>
99
100<screen><userinput remap="install">make install</userinput></screen>
101
102 </sect2>
103
104 <sect2 id="contents-utillinux" role="content">
105 <title>Contents of Util-linux</title>
106
107 <segmentedlist>
108 <segtitle>Installed programs</segtitle>
109 <segtitle>Installed libraries</segtitle>
110 <segtitle>Installed directories</segtitle>
111
112 <seglistitem>
113 <seg>addpart, agetty, blkid, blockdev, cal, cfdisk, chcpu,
114 chrt, col, colcrt, colrm, column, ctrlaltdel, cytune, delpart,
115 dmesg, eject, fallocate, fdformat, fdisk, findfs, findmnt, flock, fsck,
116 fsck.cramfs, fsck.minix, fsfreeze, fstrim, getopt, hexdump, hwclock, i386,
117 ionice, ipcmk, ipcrm, ipcs, isosize, ldattach, linux32, linux64,
118 logger, look, losetup, lsblk, lscpu, lslocks, mcookie, mkfs, mkfs.bfs,
119 mkfs.cramfs, mkfs.minix, mkswap, more, mount, mountpoint, namei, partx,
120 pg, pivot_root, prlimit, raw, readprofile, rename, renice, resizepart,
121 rev, rtcwake, script, scriptreplay, setarch, setsid, setterm, sfdisk,
122 swaplabel, swapoff (link to swapon), swapon, switch_root, tailf,
123 taskset, tunelp, ul, umount, unshare, utmpdump, uuidd, uuidgen, wall,
124 wdctl, whereis, wipefs, and x86_64</seg>
125
126 <seg>libblkid.{a,so}, libmount.{a,so}, libuuid.{a,so}</seg>
127
128 <seg>/usr/include/blkid, /usr/include/libmount, /usr/include/uuid,
129 /usr/share/getopt, /var/lib/hwclock</seg>
130 </seglistitem>
131 </segmentedlist>
132
133 <variablelist>
134 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
135 <?dbfo list-presentation="list"?>
136 <?dbhtml list-presentation="table"?>
137
138 <varlistentry id="addpart">
139 <term><command>addpart</command></term>
140 <listitem>
141 <para>Informs the Linux kernel of new partitions</para>
142 <indexterm zone="ch-system-util-linux addpart">
143 <primary sortas="b-addpart">addpart</primary>
144 </indexterm>
145 </listitem>
146 </varlistentry>
147
148 <varlistentry id="agetty">
149 <term><command>agetty</command></term>
150 <listitem>
151 <para>Opens a tty port, prompts for a login name,
152 and then invokes the <command>login</command> program</para>
153 <indexterm zone="ch-system-util-linux agetty">
154 <primary sortas="b-agetty">agetty</primary>
155 </indexterm>
156 </listitem>
157 </varlistentry>
158
159 <varlistentry id="blkid">
160 <term><command>blkid</command></term>
161 <listitem>
162 <para>A command line utility to locate and print block device
163 attributes</para>
164 <indexterm zone="ch-system-util-linux blkid">
165 <primary sortas="b-blkid">blkid</primary>
166 </indexterm>
167 </listitem>
168 </varlistentry>
169
170 <varlistentry id="blockdev">
171 <term><command>blockdev</command></term>
172 <listitem>
173 <para>Allows users to call block device ioctls from the command
174 line</para>
175 <indexterm zone="ch-system-util-linux blockdev">
176 <primary sortas="b-blockdev">blockdev</primary>
177 </indexterm>
178 </listitem>
179 </varlistentry>
180
181 <varlistentry id="cal">
182 <term><command>cal</command></term>
183 <listitem>
184 <para>Displays a simple calendar</para>
185 <indexterm zone="ch-system-util-linux cal">
186 <primary sortas="b-cal">cal</primary>
187 </indexterm>
188 </listitem>
189 </varlistentry>
190
191 <varlistentry id="cfdisk">
192 <term><command>cfdisk</command></term>
193 <listitem>
194 <para>Manipulates the partition table of the given device</para>
195 <indexterm zone="ch-system-util-linux cfdisk">
196 <primary sortas="b-cfdisk">cfdisk</primary>
197 </indexterm>
198 </listitem>
199 </varlistentry>
200
201 <varlistentry id="chcpu">
202 <term><command>chcpu</command></term>
203 <listitem>
204 <para>Modifies the state of CPUs</para>
205 <indexterm zone="ch-system-util-linux chcpu">
206 <primary sortas="b-chcpu">chcpu</primary>
207 </indexterm>
208 </listitem>
209 </varlistentry>
210
211 <varlistentry id="chrt">
212 <term><command>chrt</command></term>
213 <listitem>
214 <para>Manipulates real-time attributes of a process</para>
215 <indexterm zone="ch-system-util-linux chrt">
216 <primary sortas="b-chrt">chrt</primary>
217 </indexterm>
218 </listitem>
219 </varlistentry>
220
221 <varlistentry id="col">
222 <term><command>col</command></term>
223 <listitem>
224 <para>Filters out reverse line feeds</para>
225 <indexterm zone="ch-system-util-linux col">
226 <primary sortas="b-col">col</primary>
227 </indexterm>
228 </listitem>
229 </varlistentry>
230
231 <varlistentry id="colcrt">
232 <term><command>colcrt</command></term>
233 <listitem>
234 <para>Filters <command>nroff</command> output for terminals
235 that lack some capabilities, such as overstriking and half-lines</para>
236 <indexterm zone="ch-system-util-linux colcrt">
237 <primary sortas="b-colcrt">colcrt</primary>
238 </indexterm>
239 </listitem>
240 </varlistentry>
241
242 <varlistentry id="colrm">
243 <term><command>colrm</command></term>
244 <listitem>
245 <para>Filters out the given columns</para>
246 <indexterm zone="ch-system-util-linux colrm">
247 <primary sortas="b-colrm">colrm</primary>
248 </indexterm>
249 </listitem>
250 </varlistentry>
251
252 <varlistentry id="column">
253 <term><command>column</command></term>
254 <listitem>
255 <para>Formats a given file into multiple columns</para>
256 <indexterm zone="ch-system-util-linux column">
257 <primary sortas="b-column">column</primary>
258 </indexterm>
259 </listitem>
260 </varlistentry>
261
262 <varlistentry id="ctrlaltdel">
263 <term><command>ctrlaltdel</command></term>
264 <listitem>
265 <para>Sets the function of the Ctrl+Alt+Del key combination to a
266 hard or a soft reset</para>
267 <indexterm zone="ch-system-util-linux ctrlaltdel">
268 <primary sortas="b-ctrlaltdel">ctrlaltdel</primary>
269 </indexterm>
270 </listitem>
271 </varlistentry>
272
273 <varlistentry id="cytune">
274 <term><command>cytune</command></term>
275 <listitem>
276 <para>Tunes the parameters of the serial line drivers for
277 Cyclades cards</para>
278 <indexterm zone="ch-system-util-linux cytune">
279 <primary sortas="b-cytune">cytune</primary>
280 </indexterm>
281 </listitem>
282 </varlistentry>
283
284 <varlistentry id="delpart">
285 <term><command>delpart</command></term>
286 <listitem>
287 <para>Asks the Linux kernel to remove a partition</para>
288 <indexterm zone="ch-system-util-linux delpart">
289 <primary sortas="b-delpart">delpart</primary>
290 </indexterm>
291 </listitem>
292 </varlistentry>
293
294 <varlistentry id="dmesg">
295 <term><command>dmesg</command></term>
296 <listitem>
297 <para>Dumps the kernel boot messages</para>
298 <indexterm zone="ch-system-util-linux dmesg">
299 <primary sortas="b-dmesg">dmesg</primary>
300 </indexterm>
301 </listitem>
302 </varlistentry>
303
304 <varlistentry id="eject">
305 <term><command>eject</command></term>
306 <listitem>
307 <para>Ejects removable media</para>
308 <indexterm zone="ch-system-util-linux eject">
309 <primary sortas="b-eject">eject</primary>
310 </indexterm>
311 </listitem>
312 </varlistentry>
313
314 <varlistentry id="fallocate">
315 <term><command>fallocate</command></term>
316 <listitem>
317 <para>Preallocates space to a file</para>
318 <indexterm zone="ch-system-util-linux fallocate">
319 <primary sortas="b-fallocate">fallocate</primary>
320 </indexterm>
321 </listitem>
322 </varlistentry>
323
324 <varlistentry id="fdformat">
325 <term><command>fdformat</command></term>
326 <listitem>
327 <para>Low-level formats a floppy disk</para>
328 <indexterm zone="ch-system-util-linux fdformat">
329 <primary sortas="b-fdformat">fdformat</primary>
330 </indexterm>
331 </listitem>
332 </varlistentry>
333
334 <varlistentry id="fdisk">
335 <term><command>fdisk</command></term>
336 <listitem>
337 <para>Manipulates the paritition table of the given device</para>
338 <indexterm zone="ch-system-util-linux fdisk">
339 <primary sortas="b-fdisk">fdisk</primary>
340 </indexterm>
341 </listitem>
342 </varlistentry>
343
344 <varlistentry id="findfs">
345 <term><command>findfs</command></term>
346 <listitem>
347 <para>Finds a file system by label or Universally Unique Identifier
348 (UUID)</para>
349 <indexterm zone="ch-system-util-linux findfs">
350 <primary sortas="b-findfs">findfs</primary>
351 </indexterm>
352 </listitem>
353 </varlistentry>
354
355 <varlistentry id="findmnt">
356 <term><command>findmnt</command></term>
357 <listitem>
358 <para>Is a command line interface to the libmount library
359 for work with mountinfo, fstab and mtab files</para>
360 <indexterm zone="ch-system-util-linux findmnt">
361 <primary sortas="b-findmnt">findmnt</primary>
362 </indexterm>
363 </listitem>
364 </varlistentry>
365
366 <varlistentry id="flock">
367 <term><command>flock</command></term>
368 <listitem>
369 <para>Acquires a file lock and then executes a command with the lock
370 held</para>
371 <indexterm zone="ch-system-util-linux flock">
372 <primary sortas="b-flock">flock</primary>
373 </indexterm>
374 </listitem>
375 </varlistentry>
376
377 <varlistentry id="fsck">
378 <term><command>fsck</command></term>
379 <listitem>
380 <para>Is used to check, and optionally repair, file systems</para>
381 <indexterm zone="ch-system-util-linux fsck">
382 <primary sortas="b-fsck">fsck</primary>
383 </indexterm>
384 </listitem>
385 </varlistentry>
386
387 <varlistentry id="fsck.cramfs">
388 <term><command>fsck.cramfs</command></term>
389 <listitem>
390 <para>Performs a consistency check on the Cramfs file system on the
391 given device</para>
392 <indexterm zone="ch-system-util-linux fsck.cramfs">
393 <primary sortas="b-fsck.cramfs">fsck.cramfs</primary>
394 </indexterm>
395 </listitem>
396 </varlistentry>
397
398 <varlistentry id="fsck.minix">
399 <term><command>fsck.minix</command></term>
400 <listitem>
401 <para>Performs a consistency check on the Minix file system on the
402 given device</para>
403 <indexterm zone="ch-system-util-linux fsck.minix">
404 <primary sortas="b-fsck.minix">fsck.minix</primary>
405 </indexterm>
406 </listitem>
407 </varlistentry>
408
409 <varlistentry id="fsfreeze">
410 <term><command>fsfreeze</command></term>
411 <listitem>
412 <para>Is a very simple wrapper around FIFREEZE/FITHAW ioctl
413 kernel driver operations</para>
414 <indexterm zone="ch-system-util-linux fsfreeze">
415 <primary sortas="b-fsfreeze">fsfreeze</primary>
416 </indexterm>
417 </listitem>
418 </varlistentry>
419
420 <varlistentry id="fstrim">
421 <term><command>fstrim</command></term>
422 <listitem>
423 <para>Discards unused blocks on a mounted filesystem</para>
424 <indexterm zone="ch-system-util-linux fstrim">
425 <primary sortas="b-fstrim">fstrim</primary>
426 </indexterm>
427 </listitem>
428 </varlistentry>
429
430 <varlistentry id="getopt">
431 <term><command>getopt</command></term>
432 <listitem>
433 <para>Parses options in the given command line</para>
434 <indexterm zone="ch-system-util-linux getopt">
435 <primary sortas="b-getopt">getopt</primary>
436 </indexterm>
437 </listitem>
438 </varlistentry>
439
440 <varlistentry id="hexdump">
441 <term><command>hexdump</command></term>
442 <listitem>
443 <para>Dumps the given file in hexadecimal or in another given
444 format</para>
445 <indexterm zone="ch-system-util-linux hexdump">
446 <primary sortas="b-hexdump">hexdump</primary>
447 </indexterm>
448 </listitem>
449 </varlistentry>
450
451 <varlistentry id="hwclock">
452 <term><command>hwclock</command></term>
453 <listitem>
454 <para>Reads or sets the system's hardware clock, also called
455 the Real-Time Clock (RTC) or Basic Input-Output System (BIOS)
456 clock</para>
457 <indexterm zone="ch-system-util-linux hwclock">
458 <primary sortas="b-hwclock">hwclock</primary>
459 </indexterm>
460 </listitem>
461 </varlistentry>
462
463 <varlistentry id="i386">
464 <term><command>i386</command></term>
465 <listitem>
466 <para>A symbolic link to setarch</para>
467 <indexterm zone="ch-system-util-linux i386">
468 <primary sortas="b-i386">i386</primary>
469 </indexterm>
470 </listitem>
471 </varlistentry>
472
473 <varlistentry id="ionice">
474 <term><command>ionice</command></term>
475 <listitem>
476 <para>Gets or sets the io scheduling class and priority for a program</para>
477 <indexterm zone="ch-system-util-linux ionice">
478 <primary sortas="b-ionice">ionice</primary>
479 </indexterm>
480 </listitem>
481 </varlistentry>
482
483 <varlistentry id="ipcmk">
484 <term><command>ipcmk</command></term>
485 <listitem>
486 <para>Creates various IPC resources</para>
487 <indexterm zone="ch-system-util-linux ipcmk">
488 <primary sortas="b-ipcmk">ipcmk</primary>
489 </indexterm>
490 </listitem>
491 </varlistentry>
492
493 <varlistentry id="ipcrm">
494 <term><command>ipcrm</command></term>
495 <listitem>
496 <para>Removes the given Inter-Process Communication (IPC) resource</para>
497 <indexterm zone="ch-system-util-linux ipcrm">
498 <primary sortas="b-ipcrm">ipcrm</primary>
499 </indexterm>
500 </listitem>
501 </varlistentry>
502
503 <varlistentry id="ipcs">
504 <term><command>ipcs</command></term>
505 <listitem>
506 <para>Provides IPC status information</para>
507 <indexterm zone="ch-system-util-linux ipcs">
508 <primary sortas="b-ipcs">ipcs</primary>
509 </indexterm>
510 </listitem>
511 </varlistentry>
512
513 <varlistentry id="isosize">
514 <term><command>isosize</command></term>
515 <listitem>
516 <para>Reports the size of an iso9660 file system</para>
517 <indexterm zone="ch-system-util-linux isosize">
518 <primary sortas="b-isosize">isosize</primary>
519 </indexterm>
520 </listitem>
521 </varlistentry>
522
523 <varlistentry id="kill">
524 <term><command>kill</command></term>
525 <listitem>
526 <para>Sends signals to processes</para>
527 <indexterm zone="ch-system-util-linux kill">
528 <primary sortas="b-kill">kill</primary>
529 </indexterm>
530 </listitem>
531 </varlistentry>
532
533 <varlistentry id="ldattach">
534 <term><command>ldattach</command></term>
535 <listitem>
536 <para>Attaches a line discipline to a serial line</para>
537 <indexterm zone="ch-system-util-linux ldattach">
538 <primary sortas="b-ldattach">ldattach</primary>
539 </indexterm>
540 </listitem>
541 </varlistentry>
542
543 <varlistentry id="linux32">
544 <term><command>linux32</command></term>
545 <listitem>
546 <para>A symbolic link to setarch</para>
547 <indexterm zone="ch-system-util-linux linux32">
548 <primary sortas="b-linux32">linux32</primary>
549 </indexterm>
550 </listitem>
551 </varlistentry>
552
553 <varlistentry id="linux64">
554 <term><command>linux64</command></term>
555 <listitem>
556 <para>A symbolic link to setarch</para>
557 <indexterm zone="ch-system-util-linux linux64">
558 <primary sortas="b-linux64">linux64</primary>
559 </indexterm>
560 </listitem>
561 </varlistentry>
562
563 <varlistentry id="logger">
564 <term><command>logger</command></term>
565 <listitem>
566 <para>Enters the given message into the system log</para>
567 <indexterm zone="ch-system-util-linux logger">
568 <primary sortas="b-logger">logger</primary>
569 </indexterm>
570 </listitem>
571 </varlistentry>
572
573 <varlistentry id="look">
574 <term><command>look</command></term>
575 <listitem>
576 <para>Displays lines that begin with the given string</para>
577 <indexterm zone="ch-system-util-linux look">
578 <primary sortas="b-look">look</primary>
579 </indexterm>
580 </listitem>
581 </varlistentry>
582
583 <varlistentry id="losetup">
584 <term><command>losetup</command></term>
585 <listitem>
586 <para>Sets up and controls loop devices</para>
587 <indexterm zone="ch-system-util-linux losetup">
588 <primary sortas="b-losetup">losetup</primary>
589 </indexterm>
590 </listitem>
591 </varlistentry>
592
593 <varlistentry id="lsblk">
594 <term><command>lsblk</command></term>
595 <listitem>
596 <para>Lists information about all or selected block devices in
597 a tree-like format.</para>
598 <indexterm zone="ch-system-util-linux lsblk">
599 <primary sortas="b-lsblk">lsblk</primary>
600 </indexterm>
601 </listitem>
602 </varlistentry>
603
604 <varlistentry id="lscpu">
605 <term><command>lscpu</command></term>
606 <listitem>
607 <para>Prints CPU architecture information</para>
608 <indexterm zone="ch-system-util-linux lscpu">
609 <primary sortas="b-lscpu">lscpu</primary>
610 </indexterm>
611 </listitem>
612 </varlistentry>
613
614 <varlistentry id="lslocks">
615 <term><command>lslocks</command></term>
616 <listitem>
617 <para>Lists local system locks</para>
618 <indexterm zone="ch-system-util-linux lslocks">
619 <primary sortas="b-lslocks">lslocks</primary>
620 </indexterm>
621 </listitem>
622 </varlistentry>
623
624 <varlistentry id="mcookie">
625 <term><command>mcookie</command></term>
626 <listitem>
627 <para>Generates magic cookies (128-bit random hexadecimal numbers) for
628 <command>xauth</command></para>
629 <indexterm zone="ch-system-util-linux mcookie">
630 <primary sortas="b-mcookie">mcookie</primary>
631 </indexterm>
632 </listitem>
633 </varlistentry>
634
635 <varlistentry id="mkfs">
636 <term><command>mkfs</command></term>
637 <listitem>
638 <para>Builds a file system on a device (usually a hard disk
639 partition)</para>
640 <indexterm zone="ch-system-util-linux mkfs">
641 <primary sortas="b-mkfs">mkfs</primary>
642 </indexterm>
643 </listitem>
644 </varlistentry>
645
646 <varlistentry id="mkfs.bfs">
647 <term><command>mkfs.bfs</command></term>
648 <listitem>
649 <para>Creates a Santa Cruz Operations (SCO) bfs file system</para>
650 <indexterm zone="ch-system-util-linux mkfs.bfs">
651 <primary sortas="b-mkfs.bfs">mkfs.bfs</primary>
652 </indexterm>
653 </listitem>
654 </varlistentry>
655
656 <varlistentry id="mkfs.cramfs">
657 <term><command>mkfs.cramfs</command></term>
658 <listitem>
659 <para>Creates a cramfs file system</para>
660 <indexterm zone="ch-system-util-linux mkfs.cramfs">
661 <primary sortas="b-mkfs.cramfs">mkfs.cramfs</primary>
662 </indexterm>
663 </listitem>
664 </varlistentry>
665
666 <varlistentry id="mkfs.minix">
667 <term><command>mkfs.minix</command></term>
668 <listitem>
669 <para>Creates a Minix file system</para>
670 <indexterm zone="ch-system-util-linux mkfs.minix">
671 <primary sortas="b-mkfs.minix">mkfs.minix</primary>
672 </indexterm>
673 </listitem>
674 </varlistentry>
675
676 <varlistentry id="mkswap">
677 <term><command>mkswap</command></term>
678 <listitem>
679 <para>Initializes the given device or file to be used as a swap
680 area</para>
681 <indexterm zone="ch-system-util-linux mkswap">
682 <primary sortas="b-mkswap">mkswap</primary>
683 </indexterm>
684 </listitem>
685 </varlistentry>
686
687 <varlistentry id="more">
688 <term><command>more</command></term>
689 <listitem>
690 <para>A filter for paging through text one screen at a time</para>
691 <indexterm zone="ch-system-util-linux more">
692 <primary sortas="b-more">more</primary>
693 </indexterm>
694 </listitem>
695 </varlistentry>
696
697 <varlistentry id="mount">
698 <term><command>mount</command></term>
699 <listitem>
700 <para>Attaches the file system on the given device to a specified
701 directory in the file-system tree</para>
702 <indexterm zone="ch-system-util-linux mount">
703 <primary sortas="b-mount">mount</primary>
704 </indexterm>
705 </listitem>
706 </varlistentry>
707
708 <varlistentry id="mountpoint">
709 <term><command>mountpoint</command></term>
710 <listitem>
711 <para>Checks if the directory is a mountpoint</para>
712 <indexterm zone="ch-system-util-linux mountpoint">
713 <primary sortas="b-mountpoint">mountpoint</primary>
714 </indexterm>
715 </listitem>
716 </varlistentry>
717
718 <varlistentry id="namei">
719 <term><command>namei</command></term>
720 <listitem>
721 <para>Shows the symbolic links in the given pathnames</para>
722 <indexterm zone="ch-system-util-linux namei">
723 <primary sortas="b-namei">namei</primary>
724 </indexterm>
725 </listitem>
726 </varlistentry>
727
728 <varlistentry id="partx">
729 <term><command>partx</command></term>
730 <listitem>
731 <para>Tells the kernel about the presence and numbering of on-disk
732 partitions</para>
733 <indexterm zone="ch-system-util-linux partx">
734 <primary sortas="b-partx">partx</primary>
735 </indexterm>
736 </listitem>
737 </varlistentry>
738
739 <varlistentry id="pg">
740 <term><command>pg</command></term>
741 <listitem>
742 <para>Displays a text file one screen full at a time</para>
743 <indexterm zone="ch-system-util-linux pg">
744 <primary sortas="b-pg">pg</primary>
745 </indexterm>
746 </listitem>
747 </varlistentry>
748
749 <varlistentry id="pivot_root">
750 <term><command>pivot_root</command></term>
751 <listitem>
752 <para>Makes the given file system the new root file system of the
753 current process</para>
754 <indexterm zone="ch-system-util-linux pivot_root">
755 <primary sortas="b-pivot_root">pivot_root</primary>
756 </indexterm>
757 </listitem>
758 </varlistentry>
759
760 <varlistentry id="prlimit">
761 <term><command>prlimit</command></term>
762 <listitem>
763 <para>Get and set a process' resource limits</para>
764 <indexterm zone="ch-system-util-linux prlimit">
765 <primary sortas="b-prlimit">prlimit</primary>
766 </indexterm>
767 </listitem>
768 </varlistentry>
769
770 <varlistentry id="raw">
771 <term><command>raw</command></term>
772 <listitem>
773 <para>Bind a Linux raw character device to a block device</para>
774 <indexterm zone="ch-system-util-linux raw">
775 <primary sortas="b-raw">raw</primary>
776 </indexterm>
777 </listitem>
778 </varlistentry>
779
780 <varlistentry id="readprofile">
781 <term><command>readprofile</command></term>
782 <listitem>
783 <para>Reads kernel profiling information</para>
784 <indexterm zone="ch-system-util-linux readprofile">
785 <primary sortas="b-readprofile">readprofile</primary>
786 </indexterm>
787 </listitem>
788 </varlistentry>
789
790 <varlistentry id="rename">
791 <term><command>rename</command></term>
792 <listitem>
793 <para>Renames the given files, replacing a given string with
794 another</para>
795 <indexterm zone="ch-system-util-linux rename">
796 <primary sortas="b-rename">rename</primary>
797 </indexterm>
798 </listitem>
799 </varlistentry>
800
801 <varlistentry id="renice">
802 <term><command>renice</command></term>
803 <listitem>
804 <para>Alters the priority of running processes</para>
805 <indexterm zone="ch-system-util-linux renice">
806 <primary sortas="b-renice">renice</primary>
807 </indexterm>
808 </listitem>
809 </varlistentry>
810
811 <varlistentry id="resizepart">
812 <term><command>resizepart</command></term>
813 <listitem>
814 <para>Asks the Linux kernel to resize a partition</para>
815 <indexterm zone="ch-system-util-linux resizepart">
816 <primary sortas="b-resizepart">resizepart</primary>
817 </indexterm>
818 </listitem>
819 </varlistentry>
820
821 <varlistentry id="rev">
822 <term><command>rev</command></term>
823 <listitem>
824 <para>Reverses the lines of a given file</para>
825 <indexterm zone="ch-system-util-linux rev">
826 <primary sortas="b-rev">rev</primary>
827 </indexterm>
828 </listitem>
829 </varlistentry>
830
831 <varlistentry id="rtcwake">
832 <term><command>rtcwake</command></term>
833 <listitem>
834 <para>Used to enter a system sleep state until specified wakeup
835 time</para>
836 <indexterm zone="ch-system-util-linux rtcwake">
837 <primary sortas="b-rtcwake">rtcwake</primary>
838 </indexterm>
839 </listitem>
840 </varlistentry>
841
842 <varlistentry id="script">
843 <term><command>script</command></term>
844 <listitem>
845 <para>Makes a typescript of a terminal session</para>
846 <indexterm zone="ch-system-util-linux script">
847 <primary sortas="b-script">script</primary>
848 </indexterm>
849 </listitem>
850 </varlistentry>
851
852 <varlistentry id="scriptreplay">
853 <term><command>scriptreplay</command></term>
854 <listitem>
855 <para>Plays back typescripts using timing information</para>
856 <indexterm zone="ch-system-util-linux scriptreplay">
857 <primary sortas="b-scriptreplay">scriptreplay</primary>
858 </indexterm>
859 </listitem>
860 </varlistentry>
861
862 <varlistentry id="setarch">
863 <term><command>setarch</command></term>
864 <listitem>
865 <para>Changes reported architecture in a new program environment and
866 sets personality flags</para>
867 <indexterm zone="ch-system-util-linux setarch">
868 <primary sortas="b-setarch">setarch</primary>
869 </indexterm>
870 </listitem>
871 </varlistentry>
872
873 <varlistentry id="setsid">
874 <term><command>setsid</command></term>
875 <listitem>
876 <para>Runs the given program in a new session</para>
877 <indexterm zone="ch-system-util-linux setsid">
878 <primary sortas="b-setsid">setsid</primary>
879 </indexterm>
880 </listitem>
881 </varlistentry>
882
883 <varlistentry id="setterm">
884 <term><command>setterm</command></term>
885 <listitem>
886 <para>Sets terminal attributes</para>
887 <indexterm zone="ch-system-util-linux setterm">
888 <primary sortas="b-setterm">setterm</primary>
889 </indexterm>
890 </listitem>
891 </varlistentry>
892
893 <varlistentry id="sfdisk">
894 <term><command>sfdisk</command></term>
895 <listitem>
896 <para>A disk partition table manipulator</para>
897 <indexterm zone="ch-system-util-linux sfdisk">
898 <primary sortas="b-sfdisk">sfdisk</primary>
899 </indexterm>
900 </listitem>
901 </varlistentry>
902
903 <varlistentry id="swaplabel">
904 <term><command>swaplabel</command></term>
905 <listitem>
906 <para>Allows to change swaparea UUID and label</para>
907 <indexterm zone="ch-system-util-linux swaplabel">
908 <primary sortas="b-swaplabel">swaplabel</primary>
909 </indexterm>
910 </listitem>
911 </varlistentry>
912
913 <varlistentry id="swapoff">
914 <term><command>swapoff</command></term>
915 <listitem>
916 <para>Disables devices and files for paging and swapping</para>
917 <indexterm zone="ch-system-util-linux swapoff">
918 <primary sortas="b-swapoff">swapoff</primary>
919 </indexterm>
920 </listitem>
921 </varlistentry>
922
923 <varlistentry id="swapon">
924 <term><command>swapon</command></term>
925 <listitem>
926 <para>Enables devices and files for paging and swapping and
927 lists the devices and files currently in use</para>
928 <indexterm zone="ch-system-util-linux swapon">
929 <primary sortas="b-swapon">swapon</primary>
930 </indexterm>
931 </listitem>
932 </varlistentry>
933
934 <varlistentry id="switch_root">
935 <term><command>switch_root</command></term>
936 <listitem>
937 <para>Switches to another filesystem as the root of the mount tree</para>
938 <indexterm zone="ch-system-util-linux switch_root">
939 <primary sortas="b-switch_root">switch_root</primary>
940 </indexterm>
941 </listitem>
942 </varlistentry>
943
944 <varlistentry id="tailf">
945 <term><command>tailf</command></term>
946 <listitem>
947 <para>Tracks the growth of a log file. Displays the last 10 lines
948 of a log file, then continues displaying any new entries in the
949 log file as they are created</para>
950 <indexterm zone="ch-system-util-linux tailf">
951 <primary sortas="b-tailf">tailf</primary>
952 </indexterm>
953 </listitem>
954 </varlistentry>
955
956 <varlistentry id="taskset">
957 <term><command>taskset</command></term>
958 <listitem>
959 <para>Retrieves or sets a process' CPU affinity</para>
960 <indexterm zone="ch-system-util-linux taskset">
961 <primary sortas="b-taskset">taskset</primary>
962 </indexterm>
963 </listitem>
964 </varlistentry>
965
966 <varlistentry id="tunelp">
967 <term><command>tunelp</command></term>
968 <listitem>
969 <para>Tunes the parameters of the line printer</para>
970 <indexterm zone="ch-system-util-linux tunelp">
971 <primary sortas="b-tunelp">tunelp</primary>
972 </indexterm>
973 </listitem>
974 </varlistentry>
975
976 <varlistentry id="ul">
977 <term><command>ul</command></term>
978 <listitem>
979 <para>A filter for translating underscores into escape sequences
980 indicating underlining for the terminal in use</para>
981 <indexterm zone="ch-system-util-linux ul">
982 <primary sortas="b-ul">ul</primary>
983 </indexterm>
984 </listitem>
985 </varlistentry>
986
987 <varlistentry id="umount">
988 <term><command>umount</command></term>
989 <listitem>
990 <para>Disconnects a file system from the system's file tree</para>
991 <indexterm zone="ch-system-util-linux umount">
992 <primary sortas="b-umount">umount</primary>
993 </indexterm>
994 </listitem>
995 </varlistentry>
996
997 <varlistentry id="unshare">
998 <term><command>unshare</command></term>
999 <listitem>
1000 <para>Runs a program with some namespaces unshared from parent</para>
1001 <indexterm zone="ch-system-util-linux unshare">
1002 <primary sortas="b-unshare">unshare</primary>
1003 </indexterm>
1004 </listitem>
1005 </varlistentry>
1006
1007 <varlistentry id="utmpdump">
1008 <term><command>utmpdump</command></term>
1009 <listitem>
1010 <para>Displays the content of the given login file in a more
1011 user-friendly format</para>
1012 <indexterm zone="ch-system-util-linux utmpdump">
1013 <primary sortas="b-utmpdump">utmpdump</primary>
1014 </indexterm>
1015 </listitem>
1016 </varlistentry>
1017
1018 <varlistentry id="uuidd">
1019 <term><command>uuidd</command></term>
1020 <listitem>
1021 <para>A daemon used by the UUID library to generate time-based
1022 UUIDs in a secure and guranteed-unique fashion.</para>
1023 <indexterm zone="ch-system-util-linux uuidd">
1024 <primary sortas="b-uuidd">uuidd</primary>
1025 </indexterm>
1026 </listitem>
1027 </varlistentry>
1028
1029 <varlistentry id="uuidgen">
1030 <term><command>uuidgen</command></term>
1031 <listitem>
1032 <para>Creates new UUIDs. Each new UUID can reasonably be considered
1033 unique among all UUIDs created, on the local system and on other
1034 systems, in the past and in the future</para>
1035 <indexterm zone="ch-system-util-linux uuidgen">
1036 <primary sortas="b-uuidgen">uuidgen</primary>
1037 </indexterm>
1038 </listitem>
1039 </varlistentry>
1040
1041 <varlistentry id="wall">
1042 <term><command>wall</command></term>
1043 <listitem>
1044 <para>Displays the contents of a file or, by default, its standard
1045 input, on the terminals of all currently logged in users</para>
1046 <indexterm zone="ch-system-util-linux wall">
1047 <primary sortas="b-wall">wall</primary>
1048 </indexterm>
1049 </listitem>
1050 </varlistentry>
1051
1052 <varlistentry id="wdctl">
1053 <term><command>wdctl</command></term>
1054 <listitem>
1055 <para>Shows hardware watchdog status</para>
1056 <indexterm zone="ch-system-util-linux wdctl">
1057 <primary sortas="b-wdctl">wdctl</primary>
1058 </indexterm>
1059 </listitem>
1060 </varlistentry>
1061
1062 <varlistentry id="whereis">
1063 <term><command>whereis</command></term>
1064 <listitem>
1065 <para>Reports the location of the binary, source, and man page
1066 for the given command</para>
1067 <indexterm zone="ch-system-util-linux whereis">
1068 <primary sortas="b-whereis">whereis</primary>
1069 </indexterm>
1070 </listitem>
1071 </varlistentry>
1072
1073 <varlistentry id="wipefs">
1074 <term><command>wipefs</command></term>
1075 <listitem>
1076 <para>Wipes a filesystem signature from a device</para>
1077 <indexterm zone="ch-system-util-linux wipefs">
1078 <primary sortas="b-wipefs">wipefs</primary>
1079 </indexterm>
1080 </listitem>
1081 </varlistentry>
1082
1083 <varlistentry id="x86_64">
1084 <term><command>x86_64</command></term>
1085 <listitem>
1086 <para>A symbolic link to setarch</para>
1087 <indexterm zone="ch-system-util-linux x86_64">
1088 <primary sortas="b-x86_64">x86_64</primary>
1089 </indexterm>
1090 </listitem>
1091 </varlistentry>
1092
1093 <varlistentry id="libblkid">
1094 <term><filename class="libraryfile">libblkid</filename></term>
1095 <listitem>
1096 <para>Contains routines for device identification and token
1097 extraction</para>
1098 <indexterm zone="ch-system-util-linux libblkid">
1099 <primary sortas="c-libblkid">libblkid</primary>
1100 </indexterm>
1101 </listitem>
1102 </varlistentry>
1103
1104 <varlistentry id="libmount">
1105 <term><filename class="libraryfile">libmount</filename></term>
1106 <listitem>
1107 <para>Contains routines for block device mounting and
1108 unmounting</para>
1109 <indexterm zone="ch-system-util-linux libmount">
1110 <primary sortas="c-libmount">libmount</primary>
1111 </indexterm>
1112 </listitem>
1113 </varlistentry>
1114
1115 <varlistentry id="libuuid">
1116 <term><filename class="libraryfile">libuuid</filename></term>
1117 <listitem>
1118 <para>Contains routines for generating unique identifiers for objects
1119 that may be accessible beyond the local system</para>
1120 <indexterm zone="ch-system-util-linux libuuid">
1121 <primary sortas="c-libuuid">libuuid</primary>
1122 </indexterm>
1123 </listitem>
1124 </varlistentry>
1125
1126 </variablelist>
1127
1128 </sect2>
1129
1130</sect1>
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