source: chapter06/util-linux.xml@ 9f5aaf7

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