source: chapter06/util-linux.xml@ 12d9bda6

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Last change on this file since 12d9bda6 was 12d9bda6, checked in by Bruce Dubbs <bdubbs@…>, 12 years ago

Update to util-linux-2.22

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@9982 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

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