source: chapter06/util-linux.xml@ ab6f6bb6

7.5-systemd 7.6-systemd 7.7-systemd 7.8-systemd 7.9-systemd
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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 \
63 --disable-login \
64 --enable-mesg \
65 --with-systemdsystemunitdir=/lib/systemd/system</userinput></screen>
66
67 <variablelist>
68 <title>The meaning of the configure option:</title>
69
70 <varlistentry>
71 <term><parameter>--disable-*</parameter></term>
72 <listitem>
73 <para>These switches disable building su and login. They
74 duplicate the same programs provided by <xref
75 linkend='ch-system-shadow'/>.
76 They also require
77 <ulink url="&blfs-root;/view/svn/postlfs/linux-pam.html">Linux-PAM</ulink>
78 which is not available in LFS.</para>
79 </listitem>
80 </varlistentry>
81
82 <varlistentry>
83 <term><parameter>--enable-mesg</parameter></term>
84 <listitem>
85 <para>This switch enables building of the mesg utility which
86 was previously provided by Sysvinit package.</para>
87 </listitem>
88 </varlistentry>
89
90 <varlistentry>
91 <term><parameter>--with-systemdsystemunitdir=/lib/systemd/system</parameter></term>
92 <listitem>
93 <para>This switch sets install location for the Systemd units provided
94 with the package.</para>
95 </listitem>
96 </varlistentry>
97 </variablelist>
98
99 <para>Compile the package:</para>
100
101<screen><userinput remap="make">make</userinput></screen>
102
103 <para>This package does not come with a test suite.</para>
104
105 <para>Install the package:</para>
106
107<screen><userinput remap="install">make install</userinput></screen>
108
109 </sect2>
110
111 <sect2 id="contents-utillinux" role="content">
112 <title>Contents of Util-linux</title>
113
114 <segmentedlist>
115 <segtitle>Installed programs</segtitle>
116 <segtitle>Installed libraries</segtitle>
117 <segtitle>Installed directories</segtitle>
118
119 <seglistitem>
120 <seg>addpart, agetty, blkid, blockdev, cal, cfdisk, chcpu,
121 chrt, col, colcrt, colrm, column, ctrlaltdel, cytune, delpart,
122 dmesg, eject, fallocate, fdformat, fdisk, findfs, findmnt, flock, fsck,
123 fsck.cramfs, fsck.minix, fsfreeze, fstrim, getopt, hexdump, hwclock, i386,
124 ionice, ipcmk, ipcrm, ipcs, isosize, ldattach, linux32, linux64,
125 logger, look, losetup, lsblk, lscpu, lslocks, mcookie, mesg, mkfs, mkfs.bfs,
126 mkfs.cramfs, mkfs.minix, mkswap, more, mount, mountpoint, namei, partx,
127 pg, pivot_root, prlimit, raw, readprofile, rename, renice, resizepart,
128 rev, rtcwake, script, scriptreplay, setarch, setsid, setterm, sfdisk,
129 sulogin, swaplabel, swapoff (link to swapon), swapon, switch_root, tailf,
130 taskset, tunelp, ul, umount, unshare, utmpdump, uuidd, uuidgen, wall,
131 wdctl, whereis, wipefs, and x86_64</seg>
132
133 <seg>libblkid.{a,so}, libmount.{a,so}, libuuid.{a,so}</seg>
134
135 <seg>/usr/include/blkid, /usr/include/libmount, /usr/include/uuid,
136 /usr/share/getopt, /var/lib/hwclock</seg>
137 </seglistitem>
138 </segmentedlist>
139
140 <variablelist>
141 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
142 <?dbfo list-presentation="list"?>
143 <?dbhtml list-presentation="table"?>
144
145 <varlistentry id="addpart">
146 <term><command>addpart</command></term>
147 <listitem>
148 <para>Informs the Linux kernel of new partitions</para>
149 <indexterm zone="ch-system-util-linux addpart">
150 <primary sortas="b-addpart">addpart</primary>
151 </indexterm>
152 </listitem>
153 </varlistentry>
154
155 <varlistentry id="agetty">
156 <term><command>agetty</command></term>
157 <listitem>
158 <para>Opens a tty port, prompts for a login name,
159 and then invokes the <command>login</command> program</para>
160 <indexterm zone="ch-system-util-linux agetty">
161 <primary sortas="b-agetty">agetty</primary>
162 </indexterm>
163 </listitem>
164 </varlistentry>
165
166 <varlistentry id="blkid">
167 <term><command>blkid</command></term>
168 <listitem>
169 <para>A command line utility to locate and print block device
170 attributes</para>
171 <indexterm zone="ch-system-util-linux blkid">
172 <primary sortas="b-blkid">blkid</primary>
173 </indexterm>
174 </listitem>
175 </varlistentry>
176
177 <varlistentry id="blockdev">
178 <term><command>blockdev</command></term>
179 <listitem>
180 <para>Allows users to call block device ioctls from the command
181 line</para>
182 <indexterm zone="ch-system-util-linux blockdev">
183 <primary sortas="b-blockdev">blockdev</primary>
184 </indexterm>
185 </listitem>
186 </varlistentry>
187
188 <varlistentry id="cal">
189 <term><command>cal</command></term>
190 <listitem>
191 <para>Displays a simple calendar</para>
192 <indexterm zone="ch-system-util-linux cal">
193 <primary sortas="b-cal">cal</primary>
194 </indexterm>
195 </listitem>
196 </varlistentry>
197
198 <varlistentry id="cfdisk">
199 <term><command>cfdisk</command></term>
200 <listitem>
201 <para>Manipulates the partition table of the given device</para>
202 <indexterm zone="ch-system-util-linux cfdisk">
203 <primary sortas="b-cfdisk">cfdisk</primary>
204 </indexterm>
205 </listitem>
206 </varlistentry>
207
208 <varlistentry id="chcpu">
209 <term><command>chcpu</command></term>
210 <listitem>
211 <para>Modifies the state of CPUs</para>
212 <indexterm zone="ch-system-util-linux chcpu">
213 <primary sortas="b-chcpu">chcpu</primary>
214 </indexterm>
215 </listitem>
216 </varlistentry>
217
218 <varlistentry id="chrt">
219 <term><command>chrt</command></term>
220 <listitem>
221 <para>Manipulates real-time attributes of a process</para>
222 <indexterm zone="ch-system-util-linux chrt">
223 <primary sortas="b-chrt">chrt</primary>
224 </indexterm>
225 </listitem>
226 </varlistentry>
227
228 <varlistentry id="col">
229 <term><command>col</command></term>
230 <listitem>
231 <para>Filters out reverse line feeds</para>
232 <indexterm zone="ch-system-util-linux col">
233 <primary sortas="b-col">col</primary>
234 </indexterm>
235 </listitem>
236 </varlistentry>
237
238 <varlistentry id="colcrt">
239 <term><command>colcrt</command></term>
240 <listitem>
241 <para>Filters <command>nroff</command> output for terminals
242 that lack some capabilities, such as overstriking and half-lines</para>
243 <indexterm zone="ch-system-util-linux colcrt">
244 <primary sortas="b-colcrt">colcrt</primary>
245 </indexterm>
246 </listitem>
247 </varlistentry>
248
249 <varlistentry id="colrm">
250 <term><command>colrm</command></term>
251 <listitem>
252 <para>Filters out the given columns</para>
253 <indexterm zone="ch-system-util-linux colrm">
254 <primary sortas="b-colrm">colrm</primary>
255 </indexterm>
256 </listitem>
257 </varlistentry>
258
259 <varlistentry id="column">
260 <term><command>column</command></term>
261 <listitem>
262 <para>Formats a given file into multiple columns</para>
263 <indexterm zone="ch-system-util-linux column">
264 <primary sortas="b-column">column</primary>
265 </indexterm>
266 </listitem>
267 </varlistentry>
268
269 <varlistentry id="ctrlaltdel">
270 <term><command>ctrlaltdel</command></term>
271 <listitem>
272 <para>Sets the function of the Ctrl+Alt+Del key combination to a
273 hard or a soft reset</para>
274 <indexterm zone="ch-system-util-linux ctrlaltdel">
275 <primary sortas="b-ctrlaltdel">ctrlaltdel</primary>
276 </indexterm>
277 </listitem>
278 </varlistentry>
279
280 <varlistentry id="cytune">
281 <term><command>cytune</command></term>
282 <listitem>
283 <para>Tunes the parameters of the serial line drivers for
284 Cyclades cards</para>
285 <indexterm zone="ch-system-util-linux cytune">
286 <primary sortas="b-cytune">cytune</primary>
287 </indexterm>
288 </listitem>
289 </varlistentry>
290
291 <varlistentry id="delpart">
292 <term><command>delpart</command></term>
293 <listitem>
294 <para>Asks the Linux kernel to remove a partition</para>
295 <indexterm zone="ch-system-util-linux delpart">
296 <primary sortas="b-delpart">delpart</primary>
297 </indexterm>
298 </listitem>
299 </varlistentry>
300
301 <varlistentry id="dmesg">
302 <term><command>dmesg</command></term>
303 <listitem>
304 <para>Dumps the kernel boot messages</para>
305 <indexterm zone="ch-system-util-linux dmesg">
306 <primary sortas="b-dmesg">dmesg</primary>
307 </indexterm>
308 </listitem>
309 </varlistentry>
310
311 <varlistentry id="eject">
312 <term><command>eject</command></term>
313 <listitem>
314 <para>Ejects removable media</para>
315 <indexterm zone="ch-system-util-linux eject">
316 <primary sortas="b-eject">eject</primary>
317 </indexterm>
318 </listitem>
319 </varlistentry>
320
321 <varlistentry id="fallocate">
322 <term><command>fallocate</command></term>
323 <listitem>
324 <para>Preallocates space to a file</para>
325 <indexterm zone="ch-system-util-linux fallocate">
326 <primary sortas="b-fallocate">fallocate</primary>
327 </indexterm>
328 </listitem>
329 </varlistentry>
330
331 <varlistentry id="fdformat">
332 <term><command>fdformat</command></term>
333 <listitem>
334 <para>Low-level formats a floppy disk</para>
335 <indexterm zone="ch-system-util-linux fdformat">
336 <primary sortas="b-fdformat">fdformat</primary>
337 </indexterm>
338 </listitem>
339 </varlistentry>
340
341 <varlistentry id="fdisk">
342 <term><command>fdisk</command></term>
343 <listitem>
344 <para>Manipulates the paritition table of the given device</para>
345 <indexterm zone="ch-system-util-linux fdisk">
346 <primary sortas="b-fdisk">fdisk</primary>
347 </indexterm>
348 </listitem>
349 </varlistentry>
350
351 <varlistentry id="findfs">
352 <term><command>findfs</command></term>
353 <listitem>
354 <para>Finds a file system by label or Universally Unique Identifier
355 (UUID)</para>
356 <indexterm zone="ch-system-util-linux findfs">
357 <primary sortas="b-findfs">findfs</primary>
358 </indexterm>
359 </listitem>
360 </varlistentry>
361
362 <varlistentry id="findmnt">
363 <term><command>findmnt</command></term>
364 <listitem>
365 <para>Is a command line interface to the libmount library
366 for work with mountinfo, fstab and mtab files</para>
367 <indexterm zone="ch-system-util-linux findmnt">
368 <primary sortas="b-findmnt">findmnt</primary>
369 </indexterm>
370 </listitem>
371 </varlistentry>
372
373 <varlistentry id="flock">
374 <term><command>flock</command></term>
375 <listitem>
376 <para>Acquires a file lock and then executes a command with the lock
377 held</para>
378 <indexterm zone="ch-system-util-linux flock">
379 <primary sortas="b-flock">flock</primary>
380 </indexterm>
381 </listitem>
382 </varlistentry>
383
384 <varlistentry id="fsck">
385 <term><command>fsck</command></term>
386 <listitem>
387 <para>Is used to check, and optionally repair, file systems</para>
388 <indexterm zone="ch-system-util-linux fsck">
389 <primary sortas="b-fsck">fsck</primary>
390 </indexterm>
391 </listitem>
392 </varlistentry>
393
394 <varlistentry id="fsck.cramfs">
395 <term><command>fsck.cramfs</command></term>
396 <listitem>
397 <para>Performs a consistency check on the Cramfs file system on the
398 given device</para>
399 <indexterm zone="ch-system-util-linux fsck.cramfs">
400 <primary sortas="b-fsck.cramfs">fsck.cramfs</primary>
401 </indexterm>
402 </listitem>
403 </varlistentry>
404
405 <varlistentry id="fsck.minix">
406 <term><command>fsck.minix</command></term>
407 <listitem>
408 <para>Performs a consistency check on the Minix file system on the
409 given device</para>
410 <indexterm zone="ch-system-util-linux fsck.minix">
411 <primary sortas="b-fsck.minix">fsck.minix</primary>
412 </indexterm>
413 </listitem>
414 </varlistentry>
415
416 <varlistentry id="fsfreeze">
417 <term><command>fsfreeze</command></term>
418 <listitem>
419 <para>Is a very simple wrapper around FIFREEZE/FITHAW ioctl
420 kernel driver operations</para>
421 <indexterm zone="ch-system-util-linux fsfreeze">
422 <primary sortas="b-fsfreeze">fsfreeze</primary>
423 </indexterm>
424 </listitem>
425 </varlistentry>
426
427 <varlistentry id="fstrim">
428 <term><command>fstrim</command></term>
429 <listitem>
430 <para>Discards unused blocks on a mounted filesystem</para>
431 <indexterm zone="ch-system-util-linux fstrim">
432 <primary sortas="b-fstrim">fstrim</primary>
433 </indexterm>
434 </listitem>
435 </varlistentry>
436
437 <varlistentry id="getopt">
438 <term><command>getopt</command></term>
439 <listitem>
440 <para>Parses options in the given command line</para>
441 <indexterm zone="ch-system-util-linux getopt">
442 <primary sortas="b-getopt">getopt</primary>
443 </indexterm>
444 </listitem>
445 </varlistentry>
446
447 <varlistentry id="hexdump">
448 <term><command>hexdump</command></term>
449 <listitem>
450 <para>Dumps the given file in hexadecimal or in another given
451 format</para>
452 <indexterm zone="ch-system-util-linux hexdump">
453 <primary sortas="b-hexdump">hexdump</primary>
454 </indexterm>
455 </listitem>
456 </varlistentry>
457
458 <varlistentry id="hwclock">
459 <term><command>hwclock</command></term>
460 <listitem>
461 <para>Reads or sets the system's hardware clock, also called
462 the Real-Time Clock (RTC) or Basic Input-Output System (BIOS)
463 clock</para>
464 <indexterm zone="ch-system-util-linux hwclock">
465 <primary sortas="b-hwclock">hwclock</primary>
466 </indexterm>
467 </listitem>
468 </varlistentry>
469
470 <varlistentry id="i386">
471 <term><command>i386</command></term>
472 <listitem>
473 <para>A symbolic link to setarch</para>
474 <indexterm zone="ch-system-util-linux i386">
475 <primary sortas="b-i386">i386</primary>
476 </indexterm>
477 </listitem>
478 </varlistentry>
479
480 <varlistentry id="ionice">
481 <term><command>ionice</command></term>
482 <listitem>
483 <para>Gets or sets the io scheduling class and priority for a program</para>
484 <indexterm zone="ch-system-util-linux ionice">
485 <primary sortas="b-ionice">ionice</primary>
486 </indexterm>
487 </listitem>
488 </varlistentry>
489
490 <varlistentry id="ipcmk">
491 <term><command>ipcmk</command></term>
492 <listitem>
493 <para>Creates various IPC resources</para>
494 <indexterm zone="ch-system-util-linux ipcmk">
495 <primary sortas="b-ipcmk">ipcmk</primary>
496 </indexterm>
497 </listitem>
498 </varlistentry>
499
500 <varlistentry id="ipcrm">
501 <term><command>ipcrm</command></term>
502 <listitem>
503 <para>Removes the given Inter-Process Communication (IPC) resource</para>
504 <indexterm zone="ch-system-util-linux ipcrm">
505 <primary sortas="b-ipcrm">ipcrm</primary>
506 </indexterm>
507 </listitem>
508 </varlistentry>
509
510 <varlistentry id="ipcs">
511 <term><command>ipcs</command></term>
512 <listitem>
513 <para>Provides IPC status information</para>
514 <indexterm zone="ch-system-util-linux ipcs">
515 <primary sortas="b-ipcs">ipcs</primary>
516 </indexterm>
517 </listitem>
518 </varlistentry>
519
520 <varlistentry id="isosize">
521 <term><command>isosize</command></term>
522 <listitem>
523 <para>Reports the size of an iso9660 file system</para>
524 <indexterm zone="ch-system-util-linux isosize">
525 <primary sortas="b-isosize">isosize</primary>
526 </indexterm>
527 </listitem>
528 </varlistentry>
529
530 <varlistentry id="kill">
531 <term><command>kill</command></term>
532 <listitem>
533 <para>Sends signals to processes</para>
534 <indexterm zone="ch-system-util-linux kill">
535 <primary sortas="b-kill">kill</primary>
536 </indexterm>
537 </listitem>
538 </varlistentry>
539
540 <varlistentry id="ldattach">
541 <term><command>ldattach</command></term>
542 <listitem>
543 <para>Attaches a line discipline to a serial line</para>
544 <indexterm zone="ch-system-util-linux ldattach">
545 <primary sortas="b-ldattach">ldattach</primary>
546 </indexterm>
547 </listitem>
548 </varlistentry>
549
550 <varlistentry id="linux32">
551 <term><command>linux32</command></term>
552 <listitem>
553 <para>A symbolic link to setarch</para>
554 <indexterm zone="ch-system-util-linux linux32">
555 <primary sortas="b-linux32">linux32</primary>
556 </indexterm>
557 </listitem>
558 </varlistentry>
559
560 <varlistentry id="linux64">
561 <term><command>linux64</command></term>
562 <listitem>
563 <para>A symbolic link to setarch</para>
564 <indexterm zone="ch-system-util-linux linux64">
565 <primary sortas="b-linux64">linux64</primary>
566 </indexterm>
567 </listitem>
568 </varlistentry>
569
570 <varlistentry id="logger">
571 <term><command>logger</command></term>
572 <listitem>
573 <para>Enters the given message into the system log</para>
574 <indexterm zone="ch-system-util-linux logger">
575 <primary sortas="b-logger">logger</primary>
576 </indexterm>
577 </listitem>
578 </varlistentry>
579
580 <varlistentry id="look">
581 <term><command>look</command></term>
582 <listitem>
583 <para>Displays lines that begin with the given string</para>
584 <indexterm zone="ch-system-util-linux look">
585 <primary sortas="b-look">look</primary>
586 </indexterm>
587 </listitem>
588 </varlistentry>
589
590 <varlistentry id="losetup">
591 <term><command>losetup</command></term>
592 <listitem>
593 <para>Sets up and controls loop devices</para>
594 <indexterm zone="ch-system-util-linux losetup">
595 <primary sortas="b-losetup">losetup</primary>
596 </indexterm>
597 </listitem>
598 </varlistentry>
599
600 <varlistentry id="lsblk">
601 <term><command>lsblk</command></term>
602 <listitem>
603 <para>Lists information about all or selected block devices in
604 a tree-like format.</para>
605 <indexterm zone="ch-system-util-linux lsblk">
606 <primary sortas="b-lsblk">lsblk</primary>
607 </indexterm>
608 </listitem>
609 </varlistentry>
610
611 <varlistentry id="lscpu">
612 <term><command>lscpu</command></term>
613 <listitem>
614 <para>Prints CPU architecture information</para>
615 <indexterm zone="ch-system-util-linux lscpu">
616 <primary sortas="b-lscpu">lscpu</primary>
617 </indexterm>
618 </listitem>
619 </varlistentry>
620
621 <varlistentry id="lslocks">
622 <term><command>lslocks</command></term>
623 <listitem>
624 <para>Lists local system locks</para>
625 <indexterm zone="ch-system-util-linux lslocks">
626 <primary sortas="b-lslocks">lslocks</primary>
627 </indexterm>
628 </listitem>
629 </varlistentry>
630
631 <varlistentry id="mcookie">
632 <term><command>mcookie</command></term>
633 <listitem>
634 <para>Generates magic cookies (128-bit random hexadecimal numbers) for
635 <command>xauth</command></para>
636 <indexterm zone="ch-system-util-linux mcookie">
637 <primary sortas="b-mcookie">mcookie</primary>
638 </indexterm>
639 </listitem>
640 </varlistentry>
641
642 <varlistentry id="mesg">
643 <term><command>mesg</command></term>
644 <listitem>
645 <para>Controls whether other users can send messages to the current
646 user's terminal</para>
647 <indexterm zone="ch-system-util-linux mesg">
648 <primary sortas="b-mesg">mesg</primary>
649 </indexterm>
650 </listitem>
651 </varlistentry>
652
653 <varlistentry id="mkfs">
654 <term><command>mkfs</command></term>
655 <listitem>
656 <para>Builds a file system on a device (usually a hard disk
657 partition)</para>
658 <indexterm zone="ch-system-util-linux mkfs">
659 <primary sortas="b-mkfs">mkfs</primary>
660 </indexterm>
661 </listitem>
662 </varlistentry>
663
664 <varlistentry id="mkfs.bfs">
665 <term><command>mkfs.bfs</command></term>
666 <listitem>
667 <para>Creates a Santa Cruz Operations (SCO) bfs file system</para>
668 <indexterm zone="ch-system-util-linux mkfs.bfs">
669 <primary sortas="b-mkfs.bfs">mkfs.bfs</primary>
670 </indexterm>
671 </listitem>
672 </varlistentry>
673
674 <varlistentry id="mkfs.cramfs">
675 <term><command>mkfs.cramfs</command></term>
676 <listitem>
677 <para>Creates a cramfs file system</para>
678 <indexterm zone="ch-system-util-linux mkfs.cramfs">
679 <primary sortas="b-mkfs.cramfs">mkfs.cramfs</primary>
680 </indexterm>
681 </listitem>
682 </varlistentry>
683
684 <varlistentry id="mkfs.minix">
685 <term><command>mkfs.minix</command></term>
686 <listitem>
687 <para>Creates a Minix file system</para>
688 <indexterm zone="ch-system-util-linux mkfs.minix">
689 <primary sortas="b-mkfs.minix">mkfs.minix</primary>
690 </indexterm>
691 </listitem>
692 </varlistentry>
693
694 <varlistentry id="mkswap">
695 <term><command>mkswap</command></term>
696 <listitem>
697 <para>Initializes the given device or file to be used as a swap
698 area</para>
699 <indexterm zone="ch-system-util-linux mkswap">
700 <primary sortas="b-mkswap">mkswap</primary>
701 </indexterm>
702 </listitem>
703 </varlistentry>
704
705 <varlistentry id="more">
706 <term><command>more</command></term>
707 <listitem>
708 <para>A filter for paging through text one screen at a time</para>
709 <indexterm zone="ch-system-util-linux more">
710 <primary sortas="b-more">more</primary>
711 </indexterm>
712 </listitem>
713 </varlistentry>
714
715 <varlistentry id="mount">
716 <term><command>mount</command></term>
717 <listitem>
718 <para>Attaches the file system on the given device to a specified
719 directory in the file-system tree</para>
720 <indexterm zone="ch-system-util-linux mount">
721 <primary sortas="b-mount">mount</primary>
722 </indexterm>
723 </listitem>
724 </varlistentry>
725
726 <varlistentry id="mountpoint">
727 <term><command>mountpoint</command></term>
728 <listitem>
729 <para>Checks if the directory is a mountpoint</para>
730 <indexterm zone="ch-system-util-linux mountpoint">
731 <primary sortas="b-mountpoint">mountpoint</primary>
732 </indexterm>
733 </listitem>
734 </varlistentry>
735
736 <varlistentry id="namei">
737 <term><command>namei</command></term>
738 <listitem>
739 <para>Shows the symbolic links in the given pathnames</para>
740 <indexterm zone="ch-system-util-linux namei">
741 <primary sortas="b-namei">namei</primary>
742 </indexterm>
743 </listitem>
744 </varlistentry>
745
746 <varlistentry id="partx">
747 <term><command>partx</command></term>
748 <listitem>
749 <para>Tells the kernel about the presence and numbering of on-disk
750 partitions</para>
751 <indexterm zone="ch-system-util-linux partx">
752 <primary sortas="b-partx">partx</primary>
753 </indexterm>
754 </listitem>
755 </varlistentry>
756
757 <varlistentry id="pg">
758 <term><command>pg</command></term>
759 <listitem>
760 <para>Displays a text file one screen full at a time</para>
761 <indexterm zone="ch-system-util-linux pg">
762 <primary sortas="b-pg">pg</primary>
763 </indexterm>
764 </listitem>
765 </varlistentry>
766
767 <varlistentry id="pivot_root">
768 <term><command>pivot_root</command></term>
769 <listitem>
770 <para>Makes the given file system the new root file system of the
771 current process</para>
772 <indexterm zone="ch-system-util-linux pivot_root">
773 <primary sortas="b-pivot_root">pivot_root</primary>
774 </indexterm>
775 </listitem>
776 </varlistentry>
777
778 <varlistentry id="prlimit">
779 <term><command>prlimit</command></term>
780 <listitem>
781 <para>Get and set a process' resource limits</para>
782 <indexterm zone="ch-system-util-linux prlimit">
783 <primary sortas="b-prlimit">prlimit</primary>
784 </indexterm>
785 </listitem>
786 </varlistentry>
787
788 <varlistentry id="raw">
789 <term><command>raw</command></term>
790 <listitem>
791 <para>Bind a Linux raw character device to a block device</para>
792 <indexterm zone="ch-system-util-linux raw">
793 <primary sortas="b-raw">raw</primary>
794 </indexterm>
795 </listitem>
796 </varlistentry>
797
798 <varlistentry id="readprofile">
799 <term><command>readprofile</command></term>
800 <listitem>
801 <para>Reads kernel profiling information</para>
802 <indexterm zone="ch-system-util-linux readprofile">
803 <primary sortas="b-readprofile">readprofile</primary>
804 </indexterm>
805 </listitem>
806 </varlistentry>
807
808 <varlistentry id="rename">
809 <term><command>rename</command></term>
810 <listitem>
811 <para>Renames the given files, replacing a given string with
812 another</para>
813 <indexterm zone="ch-system-util-linux rename">
814 <primary sortas="b-rename">rename</primary>
815 </indexterm>
816 </listitem>
817 </varlistentry>
818
819 <varlistentry id="renice">
820 <term><command>renice</command></term>
821 <listitem>
822 <para>Alters the priority of running processes</para>
823 <indexterm zone="ch-system-util-linux renice">
824 <primary sortas="b-renice">renice</primary>
825 </indexterm>
826 </listitem>
827 </varlistentry>
828
829 <varlistentry id="resizepart">
830 <term><command>resizepart</command></term>
831 <listitem>
832 <para>Asks the Linux kernel to resize a partition</para>
833 <indexterm zone="ch-system-util-linux resizepart">
834 <primary sortas="b-resizepart">resizepart</primary>
835 </indexterm>
836 </listitem>
837 </varlistentry>
838
839 <varlistentry id="rev">
840 <term><command>rev</command></term>
841 <listitem>
842 <para>Reverses the lines of a given file</para>
843 <indexterm zone="ch-system-util-linux rev">
844 <primary sortas="b-rev">rev</primary>
845 </indexterm>
846 </listitem>
847 </varlistentry>
848
849 <varlistentry id="rtcwake">
850 <term><command>rtcwake</command></term>
851 <listitem>
852 <para>Used to enter a system sleep state until specified wakeup
853 time</para>
854 <indexterm zone="ch-system-util-linux rtcwake">
855 <primary sortas="b-rtcwake">rtcwake</primary>
856 </indexterm>
857 </listitem>
858 </varlistentry>
859
860 <varlistentry id="script">
861 <term><command>script</command></term>
862 <listitem>
863 <para>Makes a typescript of a terminal session</para>
864 <indexterm zone="ch-system-util-linux script">
865 <primary sortas="b-script">script</primary>
866 </indexterm>
867 </listitem>
868 </varlistentry>
869
870 <varlistentry id="scriptreplay">
871 <term><command>scriptreplay</command></term>
872 <listitem>
873 <para>Plays back typescripts using timing information</para>
874 <indexterm zone="ch-system-util-linux scriptreplay">
875 <primary sortas="b-scriptreplay">scriptreplay</primary>
876 </indexterm>
877 </listitem>
878 </varlistentry>
879
880 <varlistentry id="setarch">
881 <term><command>setarch</command></term>
882 <listitem>
883 <para>Changes reported architecture in a new program environment and
884 sets personality flags</para>
885 <indexterm zone="ch-system-util-linux setarch">
886 <primary sortas="b-setarch">setarch</primary>
887 </indexterm>
888 </listitem>
889 </varlistentry>
890
891 <varlistentry id="setsid">
892 <term><command>setsid</command></term>
893 <listitem>
894 <para>Runs the given program in a new session</para>
895 <indexterm zone="ch-system-util-linux setsid">
896 <primary sortas="b-setsid">setsid</primary>
897 </indexterm>
898 </listitem>
899 </varlistentry>
900
901 <varlistentry id="setterm">
902 <term><command>setterm</command></term>
903 <listitem>
904 <para>Sets terminal attributes</para>
905 <indexterm zone="ch-system-util-linux setterm">
906 <primary sortas="b-setterm">setterm</primary>
907 </indexterm>
908 </listitem>
909 </varlistentry>
910
911 <varlistentry id="sfdisk">
912 <term><command>sfdisk</command></term>
913 <listitem>
914 <para>A disk partition table manipulator</para>
915 <indexterm zone="ch-system-util-linux sfdisk">
916 <primary sortas="b-sfdisk">sfdisk</primary>
917 </indexterm>
918 </listitem>
919 </varlistentry>
920
921 <varlistentry id="sulogin">
922 <term><command>sulogin</command></term>
923 <listitem>
924 <para>Allows <systemitem class="username">root</systemitem> to log in;
925 it is normally invoked by <command>init</command> when the system goes
926 into single user mode</para>
927 <indexterm zone="ch-system-util-linux sulogin">
928 <primary sortas="b-sulogin">sulogin</primary>
929 </indexterm>
930 </listitem>
931 </varlistentry>
932
933 <varlistentry id="swaplabel">
934 <term><command>swaplabel</command></term>
935 <listitem>
936 <para>Allows to change swaparea UUID and label</para>
937 <indexterm zone="ch-system-util-linux swaplabel">
938 <primary sortas="b-swaplabel">swaplabel</primary>
939 </indexterm>
940 </listitem>
941 </varlistentry>
942
943 <varlistentry id="swapoff">
944 <term><command>swapoff</command></term>
945 <listitem>
946 <para>Disables devices and files for paging and swapping</para>
947 <indexterm zone="ch-system-util-linux swapoff">
948 <primary sortas="b-swapoff">swapoff</primary>
949 </indexterm>
950 </listitem>
951 </varlistentry>
952
953 <varlistentry id="swapon">
954 <term><command>swapon</command></term>
955 <listitem>
956 <para>Enables devices and files for paging and swapping and
957 lists the devices and files currently in use</para>
958 <indexterm zone="ch-system-util-linux swapon">
959 <primary sortas="b-swapon">swapon</primary>
960 </indexterm>
961 </listitem>
962 </varlistentry>
963
964 <varlistentry id="switch_root">
965 <term><command>switch_root</command></term>
966 <listitem>
967 <para>Switches to another filesystem as the root of the mount tree</para>
968 <indexterm zone="ch-system-util-linux switch_root">
969 <primary sortas="b-switch_root">switch_root</primary>
970 </indexterm>
971 </listitem>
972 </varlistentry>
973
974 <varlistentry id="tailf">
975 <term><command>tailf</command></term>
976 <listitem>
977 <para>Tracks the growth of a log file. Displays the last 10 lines
978 of a log file, then continues displaying any new entries in the
979 log file as they are created</para>
980 <indexterm zone="ch-system-util-linux tailf">
981 <primary sortas="b-tailf">tailf</primary>
982 </indexterm>
983 </listitem>
984 </varlistentry>
985
986 <varlistentry id="taskset">
987 <term><command>taskset</command></term>
988 <listitem>
989 <para>Retrieves or sets a process' CPU affinity</para>
990 <indexterm zone="ch-system-util-linux taskset">
991 <primary sortas="b-taskset">taskset</primary>
992 </indexterm>
993 </listitem>
994 </varlistentry>
995
996 <varlistentry id="tunelp">
997 <term><command>tunelp</command></term>
998 <listitem>
999 <para>Tunes the parameters of the line printer</para>
1000 <indexterm zone="ch-system-util-linux tunelp">
1001 <primary sortas="b-tunelp">tunelp</primary>
1002 </indexterm>
1003 </listitem>
1004 </varlistentry>
1005
1006 <varlistentry id="ul">
1007 <term><command>ul</command></term>
1008 <listitem>
1009 <para>A filter for translating underscores into escape sequences
1010 indicating underlining for the terminal in use</para>
1011 <indexterm zone="ch-system-util-linux ul">
1012 <primary sortas="b-ul">ul</primary>
1013 </indexterm>
1014 </listitem>
1015 </varlistentry>
1016
1017 <varlistentry id="umount">
1018 <term><command>umount</command></term>
1019 <listitem>
1020 <para>Disconnects a file system from the system's file tree</para>
1021 <indexterm zone="ch-system-util-linux umount">
1022 <primary sortas="b-umount">umount</primary>
1023 </indexterm>
1024 </listitem>
1025 </varlistentry>
1026
1027 <varlistentry id="unshare">
1028 <term><command>unshare</command></term>
1029 <listitem>
1030 <para>Runs a program with some namespaces unshared from parent</para>
1031 <indexterm zone="ch-system-util-linux unshare">
1032 <primary sortas="b-unshare">unshare</primary>
1033 </indexterm>
1034 </listitem>
1035 </varlistentry>
1036
1037 <varlistentry id="utmpdump">
1038 <term><command>utmpdump</command></term>
1039 <listitem>
1040 <para>Displays the content of the given login file in a more
1041 user-friendly format</para>
1042 <indexterm zone="ch-system-util-linux utmpdump">
1043 <primary sortas="b-utmpdump">utmpdump</primary>
1044 </indexterm>
1045 </listitem>
1046 </varlistentry>
1047
1048 <varlistentry id="uuidd">
1049 <term><command>uuidd</command></term>
1050 <listitem>
1051 <para>A daemon used by the UUID library to generate time-based
1052 UUIDs in a secure and guranteed-unique fashion.</para>
1053 <indexterm zone="ch-system-util-linux uuidd">
1054 <primary sortas="b-uuidd">uuidd</primary>
1055 </indexterm>
1056 </listitem>
1057 </varlistentry>
1058
1059 <varlistentry id="uuidgen">
1060 <term><command>uuidgen</command></term>
1061 <listitem>
1062 <para>Creates new UUIDs. Each new UUID can reasonably be considered
1063 unique among all UUIDs created, on the local system and on other
1064 systems, in the past and in the future</para>
1065 <indexterm zone="ch-system-util-linux uuidgen">
1066 <primary sortas="b-uuidgen">uuidgen</primary>
1067 </indexterm>
1068 </listitem>
1069 </varlistentry>
1070
1071 <varlistentry id="wall">
1072 <term><command>wall</command></term>
1073 <listitem>
1074 <para>Displays the contents of a file or, by default, its standard
1075 input, on the terminals of all currently logged in users</para>
1076 <indexterm zone="ch-system-util-linux wall">
1077 <primary sortas="b-wall">wall</primary>
1078 </indexterm>
1079 </listitem>
1080 </varlistentry>
1081
1082 <varlistentry id="wdctl">
1083 <term><command>wdctl</command></term>
1084 <listitem>
1085 <para>Shows hardware watchdog status</para>
1086 <indexterm zone="ch-system-util-linux wdctl">
1087 <primary sortas="b-wdctl">wdctl</primary>
1088 </indexterm>
1089 </listitem>
1090 </varlistentry>
1091
1092 <varlistentry id="whereis">
1093 <term><command>whereis</command></term>
1094 <listitem>
1095 <para>Reports the location of the binary, source, and man page
1096 for the given command</para>
1097 <indexterm zone="ch-system-util-linux whereis">
1098 <primary sortas="b-whereis">whereis</primary>
1099 </indexterm>
1100 </listitem>
1101 </varlistentry>
1102
1103 <varlistentry id="wipefs">
1104 <term><command>wipefs</command></term>
1105 <listitem>
1106 <para>Wipes a filesystem signature from a device</para>
1107 <indexterm zone="ch-system-util-linux wipefs">
1108 <primary sortas="b-wipefs">wipefs</primary>
1109 </indexterm>
1110 </listitem>
1111 </varlistentry>
1112
1113 <varlistentry id="x86_64">
1114 <term><command>x86_64</command></term>
1115 <listitem>
1116 <para>A symbolic link to setarch</para>
1117 <indexterm zone="ch-system-util-linux x86_64">
1118 <primary sortas="b-x86_64">x86_64</primary>
1119 </indexterm>
1120 </listitem>
1121 </varlistentry>
1122
1123 <varlistentry id="libblkid">
1124 <term><filename class="libraryfile">libblkid</filename></term>
1125 <listitem>
1126 <para>Contains routines for device identification and token
1127 extraction</para>
1128 <indexterm zone="ch-system-util-linux libblkid">
1129 <primary sortas="c-libblkid">libblkid</primary>
1130 </indexterm>
1131 </listitem>
1132 </varlistentry>
1133
1134 <varlistentry id="libmount">
1135 <term><filename class="libraryfile">libmount</filename></term>
1136 <listitem>
1137 <para>Contains routines for block device mounting and
1138 unmounting</para>
1139 <indexterm zone="ch-system-util-linux libmount">
1140 <primary sortas="c-libmount">libmount</primary>
1141 </indexterm>
1142 </listitem>
1143 </varlistentry>
1144
1145 <varlistentry id="libuuid">
1146 <term><filename class="libraryfile">libuuid</filename></term>
1147 <listitem>
1148 <para>Contains routines for generating unique identifiers for objects
1149 that may be accessible beyond the local system</para>
1150 <indexterm zone="ch-system-util-linux libuuid">
1151 <primary sortas="c-libuuid">libuuid</primary>
1152 </indexterm>
1153 </listitem>
1154 </varlistentry>
1155
1156 </variablelist>
1157
1158 </sect2>
1159
1160</sect1>
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