source: BOOK/final-system/common/util-linux.xml@ 834692e

clfs-2.1 clfs-3.0.0-systemd clfs-3.0.0-sysvinit systemd sysvinit
Last change on this file since 834692e was 748aac4, checked in by William Harrington <kb0iic@…>, 12 years ago

Add kill to list of instlled programs.

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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 <title>Util-linux-&util-linux-version;</title>
12
13 <indexterm zone="ch-system-util-linux">
14 <primary sortas="a-Util-linux">Util-linux</primary>
15 </indexterm>
16
17 <sect2 role="package">
18 <title/>
19
20 <para>The Util-linux package contains miscellaneous utility programs.
21 Among them are utilities for handling file systems, consoles, partitions,
22 and messages.</para>
23
24 </sect2>
25
26 <sect2 id="fhs-util-linux" role="installation">
27 <title>FHS compliance notes</title>
28
29 <para>The FHS recommends using the <filename
30 class="directory">/var/lib/hwclock</filename> directory instead of the
31 usual <filename class="directory">/etc</filename> directory as the
32 location for the <filename>adjtime</filename> file. To make the
33 <command>hwclock</command> program FHS-compliant, run the following:</para>
34
35<screen><userinput>sed -i -e 's@etc/adjtime@var/lib/hwclock/adjtime@g' \
36 $(grep -rl '/etc/adjtime' .)
37mkdir -pv /var/lib/hwclock</userinput></screen>
38
39 </sect2>
40
41 <sect2 role="installation">
42 <title>Installation of Util-linux</title>
43
44 <para os="a">Prepare Util-linux for compilation:</para>
45
46<screen os="b"><userinput>./configure --enable-arch \
47 --enable-write --disable-wall \
48 --disable-login --disable-su</userinput></screen>
49
50 <variablelist os="c">
51 <title>The meaning of the configure options:</title>
52
53 <varlistentry>
54 <term><parameter>--enable-arch</parameter></term>
55 <listitem>
56 <para>This option allows the <command>arch</command> program to be
57 installed.</para>
58 </listitem>
59 </varlistentry>
60
61 <varlistentry>
62 <term><parameter>--enable-write</parameter></term>
63 <listitem>
64 <para>This option allows the <command>write</command> program to be
65 installed.</para>
66 </listitem>
67 </varlistentry>
68
69 <varlistentry>
70 <term><parameter>--disable-wall</parameter></term>
71 <listitem>
72 <para>Disables building the <command>wall</command> program,
73 as the Sysvinit package installs its own version.</para>
74 </listitem>
75 </varlistentry>
76
77 </variablelist>
78
79 <para os="d">Compile the package:</para>
80
81<screen os="e"><userinput>make</userinput></screen>
82
83 <para os="f">This package does not come with a test suite.</para>
84
85 <para os="g">Install the package:</para>
86
87<screen os="h"><userinput>make install</userinput></screen>
88
89 <para os="i">Move the <command>logger</command> binary to
90 <filename class="directory">/bin</filename> as it is needed by the
91 CLFS-Bootscripts package:</para>
92
93<screen os="j"><userinput>mv -v /usr/bin/logger /bin</userinput></screen>
94
95 </sect2>
96
97 <sect2 id="contents-util-linux" role="content">
98 <title>Contents of Util-linux</title>
99
100 <segmentedlist>
101 <segtitle>Installed programs</segtitle>
102 <segtitle>Installed libraries</segtitle>
103 <segtitle>Installed directories</segtitle>
104
105 <seglistitem>
106 <seg>addpart, agetty, arch, blkid, blockdev, cal, cfdisk, chkdupexe,
107 chrt, col, colcrt, colrm, column, ctrlaltdel, cytune, ddate, delpart,
108 dmesg, fallocate, fdformat, fdisk, findfs, findmnt, flock, fsck,
109 fsck.cramfs, fsck.minix, fsfreeze, fstrim, getopt, hexdump, hwclock,
110 ionice, ipcmk, ipcrm, ipcs, isosize, kill, ldattach, line, logger,
111 look, losetup, lsblk, lscpu, mcookie, mkfs, mkfs.bfs, mkfs.cramfs,
112 mkfs.minix, mkswap, more, mount, namei, partx, pg, pivot_root,
113 readprofile, rename, renice, rev, rtcwake, script, scriptreplay,
114 setarch, setsid, setterm, sfdisk, swaplabel,
115 swapoff (link to swapon), swapon, switch_root, tailf, taskset,
116 tunelp, ul, umount, unshare, uuidd, uuidgen, whereis, wipefs,
117 and write</seg>
118 <seg>libblkid.[a,so], libmount.[a,so], and libuuid.[a,so]</seg>
119 <seg>/usr/include/blkid, /usr/include/libmount, /usr/include/uuid,
120 /usr/share/getopt, /var/lib/hwclock</seg>
121 </seglistitem>
122 </segmentedlist>
123
124 <variablelist>
125 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
126 <?dbfo list-presentation="list"?>
127 <?dbhtml list-presentation="table"?>
128
129 <varlistentry id="addpart">
130 <term><command>addpart</command></term>
131 <listitem>
132 <para>Informs the kernel of a new partition</para>
133 <indexterm zone="ch-system-util-linux addpart">
134 <primary sortas="b-addpart">addpart</primary>
135 </indexterm>
136 </listitem>
137 </varlistentry>
138
139 <varlistentry id="agetty">
140 <term><command>agetty</command></term>
141 <listitem>
142 <para>Opens a tty port, prompts for a login name,
143 and then invokes the <command>login</command> program</para>
144 <indexterm zone="ch-system-util-linux agetty">
145 <primary sortas="b-agetty">agetty</primary>
146 </indexterm>
147 </listitem>
148 </varlistentry>
149
150 <varlistentry id="arch">
151 <term><command>arch</command></term>
152 <listitem>
153 <para>Reports the machine's architecture</para>
154 <indexterm zone="ch-system-util-linux arch">
155 <primary sortas="b-arch">arch</primary>
156 </indexterm>
157 </listitem>
158 </varlistentry>
159
160 <varlistentry id="blkid">
161 <term><command>blkid</command></term>
162 <listitem>
163 <para>A command line utility to locate and print block device
164 attributes</para>
165 <indexterm zone="ch-system-util-linux blkid">
166 <primary sortas="b-blkid">blkid</primary>
167 </indexterm>
168 </listitem>
169 </varlistentry>
170
171 <varlistentry id="blockdev">
172 <term><command>blockdev</command></term>
173 <listitem>
174 <para>Allows users to call block device ioctls from the command
175 line</para>
176 <indexterm zone="ch-system-util-linux blockdev">
177 <primary sortas="b-blockdev">blockdev</primary>
178 </indexterm>
179 </listitem>
180 </varlistentry>
181
182 <varlistentry id="cal">
183 <term><command>cal</command></term>
184 <listitem>
185 <para>Displays a simple calendar</para>
186 <indexterm zone="ch-system-util-linux cal">
187 <primary sortas="b-cal">cal</primary>
188 </indexterm>
189 </listitem>
190 </varlistentry>
191
192 <varlistentry id="cfdisk">
193 <term><command>cfdisk</command></term>
194 <listitem>
195 <para>Manipulates the partition table of the given device</para>
196 <indexterm zone="ch-system-util-linux cfdisk">
197 <primary sortas="b-cfdisk">cfdisk</primary>
198 </indexterm>
199 </listitem>
200 </varlistentry>
201
202 <varlistentry id="chkdupexe">
203 <term><command>chkdupexe</command></term>
204 <listitem>
205 <para>Finds duplicate executables</para>
206 <indexterm zone="ch-system-util-linux chkdupexe">
207 <primary sortas="b-chkdupexe">chkdupexe</primary>
208 </indexterm>
209 </listitem>
210 </varlistentry>
211
212 <varlistentry id="chrt">
213 <term><command>chrt</command></term>
214 <listitem>
215 <para>Manipulates real-time attributes of a process</para>
216 <indexterm zone="ch-system-util-linux chrt">
217 <primary sortas="b-chrt">chrt</primary>
218 </indexterm>
219 </listitem>
220 </varlistentry>
221
222 <varlistentry id="col">
223 <term><command>col</command></term>
224 <listitem>
225 <para>Filters out reverse line feeds</para>
226 <indexterm zone="ch-system-util-linux col">
227 <primary sortas="b-col">col</primary>
228 </indexterm>
229 </listitem>
230 </varlistentry>
231
232 <varlistentry id="colcrt">
233 <term><command>colcrt</command></term>
234 <listitem>
235 <para>Filters <command>nroff</command> output for terminals
236 that lack some capabilities, such as overstriking and half-lines</para>
237 <indexterm zone="ch-system-util-linux colcrt">
238 <primary sortas="b-colcrt">colcrt</primary>
239 </indexterm>
240 </listitem>
241 </varlistentry>
242
243 <varlistentry id="colrm">
244 <term><command>colrm</command></term>
245 <listitem>
246 <para>Filters out the given columns</para>
247 <indexterm zone="ch-system-util-linux colrm">
248 <primary sortas="b-colrm">colrm</primary>
249 </indexterm>
250 </listitem>
251 </varlistentry>
252
253 <varlistentry id="column">
254 <term><command>column</command></term>
255 <listitem>
256 <para>Formats a given file into multiple columns</para>
257 <indexterm zone="ch-system-util-linux column">
258 <primary sortas="b-column">column</primary>
259 </indexterm>
260 </listitem>
261 </varlistentry>
262
263 <varlistentry id="ctrlaltdel">
264 <term><command>ctrlaltdel</command></term>
265 <listitem>
266 <para>Sets the function of the Ctrl+Alt+Del key combination to a
267 hard or a soft reset</para>
268 <indexterm zone="ch-system-util-linux ctrlaltdel">
269 <primary sortas="b-ctrlaltdel">ctrlaltdel</primary>
270 </indexterm>
271 </listitem>
272 </varlistentry>
273
274 <varlistentry id="cytune">
275 <term><command>cytune</command></term>
276 <listitem>
277 <para>Tunes the parameters of the serial line drivers for
278 Cyclades cards</para>
279 <indexterm zone="ch-system-util-linux cytune">
280 <primary sortas="b-cytune">cytune</primary>
281 </indexterm>
282 </listitem>
283 </varlistentry>
284
285 <varlistentry id="ddate">
286 <term><command>ddate</command></term>
287 <listitem>
288 <para>Gives the Discordian date or converts the given Gregorian date
289 to a Discordian one</para>
290 <indexterm zone="ch-system-util-linux ddate">
291 <primary sortas="b-ddate">ddate</primary>
292 </indexterm>
293 </listitem>
294 </varlistentry>
295
296 <varlistentry id="delpart">
297 <term><command>delpart</command></term>
298 <listitem>
299 <para>Asks the kernel to remove a partition</para>
300 <indexterm zone="ch-system-util-linux delpart">
301 <primary sortas="b-delpart">delpart</primary>
302 </indexterm>
303 </listitem>
304 </varlistentry>
305
306 <varlistentry id="dmesg">
307 <term><command>dmesg</command></term>
308 <listitem>
309 <para>Dumps the kernel boot messages</para>
310 <indexterm zone="ch-system-util-linux dmesg">
311 <primary sortas="b-dmesg">dmesg</primary>
312 </indexterm>
313 </listitem>
314 </varlistentry>
315
316 <varlistentry id="fallocate">
317 <term><command>fallocate</command></term>
318 <listitem>
319 <para>Preallocates space to a file</para>
320 <indexterm zone="ch-system-util-linux fallocate">
321 <primary sortas="b-fallocate">fallocate</primary>
322 </indexterm>
323 </listitem>
324 </varlistentry>
325
326 <varlistentry id="fdformat">
327 <term><command>fdformat</command></term>
328 <listitem>
329 <para>Low-level formats a floppy disk</para>
330 <indexterm zone="ch-system-util-linux fdformat">
331 <primary sortas="b-fdformat">fdformat</primary>
332 </indexterm>
333 </listitem>
334 </varlistentry>
335
336 <varlistentry id="fdisk">
337 <term><command>fdisk</command></term>
338 <listitem>
339 <para>Manipulates the partition table of the given device</para>
340 <indexterm zone="ch-system-util-linux fdisk">
341 <primary sortas="b-fdisk">fdisk</primary>
342 </indexterm>
343 </listitem>
344 </varlistentry>
345
346 <varlistentry id="findfs">
347 <term><command>findfs</command></term>
348 <listitem>
349 <para>Finds a file system by label or Universally Unique Identifier
350 (UUID)</para>
351 <indexterm zone="ch-system-util-linux findfs">
352 <primary sortas="b-findfs">findfs</primary>
353 </indexterm>
354 </listitem>
355 </varlistentry>
356
357 <varlistentry id="findmnt">
358 <term><command>findmnt</command></term>
359 <listitem>
360 <para>Lists mounted filesystems or searches for a filesystem</para>
361 <indexterm zone="ch-system-util-linux findmnt">
362 <primary sortas="b-findmnt">findmnt</primary>
363 </indexterm>
364 </listitem>
365 </varlistentry>
366
367 <varlistentry id="flock">
368 <term><command>flock</command></term>
369 <listitem>
370 <para>Acquires a file lock and then executes a command with the lock
371 held</para>
372 <indexterm zone="ch-system-util-linux flock">
373 <primary sortas="b-flock">flock</primary>
374 </indexterm>
375 </listitem>
376 </varlistentry>
377
378 <varlistentry id="fsck">
379 <term><command>fsck</command></term>
380 <listitem>
381 <para>Is used to check, and optionally repair, file systems</para>
382 <indexterm zone="ch-system-util-linux fsck">
383 <primary sortas="b-fsck">fsck</primary>
384 </indexterm>
385 </listitem>
386 </varlistentry>
387
388 <varlistentry id="fsck.cramfs">
389 <term><command>fsck.cramfs</command></term>
390 <listitem>
391 <para>Performs a consistency check on the Cramfs file system on the
392 given device</para>
393 <indexterm zone="ch-system-util-linux fsck.cramfs">
394 <primary sortas="b-fsck.cramfs">fsck.cramfs</primary>
395 </indexterm>
396 </listitem>
397 </varlistentry>
398
399 <varlistentry id="fsck.minix">
400 <term><command>fsck.minix</command></term>
401 <listitem>
402 <para>Performs a consistency check on the Minix file system on the
403 given device</para>
404 <indexterm zone="ch-system-util-linux fsck.minix">
405 <primary sortas="b-fsck.minix">fsck.minix</primary>
406 </indexterm>
407 </listitem>
408 </varlistentry>
409
410 <varlistentry id="fsfreeze">
411 <term><command>fsfreeze</command></term>
412 <listitem>
413 <para>Suspends and resumes access to a filesystem</para>
414 <indexterm zone="ch-system-util-linux fsfreeze">
415 <primary sortas="b-fsfreeze">fsfreeze</primary>
416 </indexterm>
417 </listitem>
418 </varlistentry>
419
420 <varlistentry id="fstrim">
421 <term><command>fstrim</command></term>
422 <listitem>
423 <para>Discards unused blocks on a mounted filesystem</para>
424 <indexterm zone="ch-system-util-linux fstrim">
425 <primary sortas="b-fstrim">fstrim</primary>
426 </indexterm>
427 </listitem>
428 </varlistentry>
429
430 <varlistentry id="getopt">
431 <term><command>getopt</command></term>
432 <listitem>
433 <para>Parses options in the given command line</para>
434 <indexterm zone="ch-system-util-linux getopt">
435 <primary sortas="b-getopt">getopt</primary>
436 </indexterm>
437 </listitem>
438 </varlistentry>
439
440 <varlistentry id="hexdump">
441 <term><command>hexdump</command></term>
442 <listitem>
443 <para>Dumps the given file in hexadecimal or in another given
444 format</para>
445 <indexterm zone="ch-system-util-linux hexdump">
446 <primary sortas="b-hexdump">hexdump</primary>
447 </indexterm>
448 </listitem>
449 </varlistentry>
450
451 <varlistentry id="hwclock">
452 <term><command>hwclock</command></term>
453 <listitem>
454 <para>Reads or sets the system's hardware clock, also called
455 the Real-Time Clock (RTC) or Basic Input-Output System (BIOS)
456 clock</para>
457 <indexterm zone="ch-system-util-linux hwclock">
458 <primary sortas="b-hwclock">hwclock</primary>
459 </indexterm>
460 </listitem>
461 </varlistentry>
462
463 <varlistentry id="ionice">
464 <term><command>ionice</command></term>
465 <listitem>
466 <para>Gives and sets program I/O scheduling class and priority</para>
467 <indexterm zone="ch-system-util-linux ionice">
468 <primary sortas="b-ionice">ionice</primary>
469 </indexterm>
470 </listitem>
471 </varlistentry>
472
473 <varlistentry id="ipcmk">
474 <term><command>ipcmk</command></term>
475 <listitem>
476 <para>Creates various IPC resources</para>
477 <indexterm zone="ch-system-util-linux ipcmk">
478 <primary sortas="b-ipcmk">ipcmk</primary>
479 </indexterm>
480 </listitem>
481 </varlistentry>
482
483 <varlistentry id="ipcrm">
484 <term><command>ipcrm</command></term>
485 <listitem>
486 <para>Removes the given Inter-Process Communication (IPC) resource</para>
487 <indexterm zone="ch-system-util-linux ipcrm">
488 <primary sortas="b-ipcrm">ipcrm</primary>
489 </indexterm>
490 </listitem>
491 </varlistentry>
492
493 <varlistentry id="ipcs">
494 <term><command>ipcs</command></term>
495 <listitem>
496 <para>Provides IPC status information</para>
497 <indexterm zone="ch-system-util-linux ipcs">
498 <primary sortas="b-ipcs">ipcs</primary>
499 </indexterm>
500 </listitem>
501 </varlistentry>
502
503 <varlistentry id="isosize">
504 <term><command>isosize</command></term>
505 <listitem>
506 <para>Reports the size of an iso9660 file system</para>
507 <indexterm zone="ch-system-util-linux isosize">
508 <primary sortas="b-isosize">isosize</primary>
509 </indexterm>
510 </listitem>
511 </varlistentry>
512
513 <varlistentry id="kill">
514 <term><command>kill</command></term>
515 <listitem>
516 <para>Send a signal to a process</para>
517 <indexterm zone="ch-system-util-linux kill">
518 <primary sortas="b-kill">kill</primary>
519 </indexterm>
520 </listitem>
521 </varlistentry>
522
523 <varlistentry id="ldattach">
524 <term><command>ldattach</command></term>
525 <listitem>
526 <para>Attaches a line discipline to a serial line</para>
527 <indexterm zone="ch-system-util-linux ldattach">
528 <primary sortas="b-ldattach">ldattach</primary>
529 </indexterm>
530 </listitem>
531 </varlistentry>
532
533 <varlistentry id="line">
534 <term><command>line</command></term>
535 <listitem>
536 <para>Copies a single line</para>
537 <indexterm zone="ch-system-util-linux line">
538 <primary sortas="b-line">line</primary>
539 </indexterm>
540 </listitem>
541 </varlistentry>
542
543 <varlistentry id="logger">
544 <term><command>logger</command></term>
545 <listitem>
546 <para>Enters the given message into the system log</para>
547 <indexterm zone="ch-system-util-linux logger">
548 <primary sortas="b-logger">logger</primary>
549 </indexterm>
550 </listitem>
551 </varlistentry>
552
553 <varlistentry id="look">
554 <term><command>look</command></term>
555 <listitem>
556 <para>Displays lines that begin with the given string</para>
557 <indexterm zone="ch-system-util-linux look">
558 <primary sortas="b-look">look</primary>
559 </indexterm>
560 </listitem>
561 </varlistentry>
562
563 <varlistentry id="losetup">
564 <term><command>losetup</command></term>
565 <listitem>
566 <para>Sets up and controls loop devices</para>
567 <indexterm zone="ch-system-util-linux losetup">
568 <primary sortas="b-losetup">losetup</primary>
569 </indexterm>
570 </listitem>
571 </varlistentry>
572
573 <varlistentry id="lsblk">
574 <term><command>lsblk</command></term>
575 <listitem>
576 <para>Prints information about block devices</para>
577 <indexterm zone="ch-system-util-linux lsblk">
578 <primary sortas="b-lsblk">lsblk</primary>
579 </indexterm>
580 </listitem>
581 </varlistentry>
582
583 <varlistentry id="lscpu">
584 <term><command>lscpu</command></term>
585 <listitem>
586 <para>Prints CPU architechture information</para>
587 <indexterm zone="ch-system-util-linux lscpu">
588 <primary sortas="b-lscpu">lscpu</primary>
589 </indexterm>
590 </listitem>
591 </varlistentry>
592
593 <varlistentry id="mcookie">
594 <term><command>mcookie</command></term>
595 <listitem>
596 <para>Generates magic cookies (128-bit random hexadecimal numbers) for
597 <command>xauth</command></para>
598 <indexterm zone="ch-system-util-linux mcookie">
599 <primary sortas="b-mcookie">mcookie</primary>
600 </indexterm>
601 </listitem>
602 </varlistentry>
603
604 <varlistentry id="mkfs">
605 <term><command>mkfs</command></term>
606 <listitem>
607 <para>Builds a file system on a device (usually a hard disk
608 partition)</para>
609 <indexterm zone="ch-system-util-linux mkfs">
610 <primary sortas="b-mkfs">mkfs</primary>
611 </indexterm>
612 </listitem>
613 </varlistentry>
614
615 <varlistentry id="mkfs.bfs">
616 <term><command>mkfs.bfs</command></term>
617 <listitem>
618 <para>Creates a Santa Cruz Operations (SCO) bfs file system</para>
619 <indexterm zone="ch-system-util-linux mkfs.bfs">
620 <primary sortas="b-mkfs.bfs">mkfs.bfs</primary>
621 </indexterm>
622 </listitem>
623 </varlistentry>
624
625 <varlistentry id="mkfs.cramfs">
626 <term><command>mkfs.cramfs</command></term>
627 <listitem>
628 <para>Creates a cramfs file system</para>
629 <indexterm zone="ch-system-util-linux mkfs.cramfs">
630 <primary sortas="b-mkfs.cramfs">mkfs.cramfs</primary>
631 </indexterm>
632 </listitem>
633 </varlistentry>
634
635 <varlistentry id="mkfs.minix">
636 <term><command>mkfs.minix</command></term>
637 <listitem>
638 <para>Creates a Minix file system</para>
639 <indexterm zone="ch-system-util-linux mkfs.minix">
640 <primary sortas="b-mkfs.minix">mkfs.minix</primary>
641 </indexterm>
642 </listitem>
643 </varlistentry>
644
645 <varlistentry id="mkswap">
646 <term><command>mkswap</command></term>
647 <listitem>
648 <para>Initializes the given device or file to be used as a swap
649 area</para>
650 <indexterm zone="ch-system-util-linux mkswap">
651 <primary sortas="b-mkswap">mkswap</primary>
652 </indexterm>
653 </listitem>
654 </varlistentry>
655
656 <varlistentry id="more">
657 <term><command>more</command></term>
658 <listitem>
659 <para>A filter for paging through text one screen at a time</para>
660 <indexterm zone="ch-system-util-linux more">
661 <primary sortas="b-more">more</primary>
662 </indexterm>
663 </listitem>
664 </varlistentry>
665
666 <varlistentry id="mount">
667 <term><command>mount</command></term>
668 <listitem>
669 <para>Attaches the file system on the given device to a specified
670 directory in the file-system tree</para>
671 <indexterm zone="ch-system-util-linux mount">
672 <primary sortas="b-mount">mount</primary>
673 </indexterm>
674 </listitem>
675 </varlistentry>
676
677 <varlistentry id="namei">
678 <term><command>namei</command></term>
679 <listitem>
680 <para>Shows the symbolic links in the given pathnames</para>
681 <indexterm zone="ch-system-util-linux namei">
682 <primary sortas="b-namei">namei</primary>
683 </indexterm>
684 </listitem>
685 </varlistentry>
686
687 <varlistentry id="partx">
688 <term><command>partx</command></term>
689 <listitem>
690 <para>Tells the kernel about the presence and numbering of on-disk
691 partitions</para>
692 <indexterm zone="ch-system-util-linux partx">
693 <primary sortas="b-partx">partx</primary>
694 </indexterm>
695 </listitem>
696 </varlistentry>
697
698 <varlistentry id="pg">
699 <term><command>pg</command></term>
700 <listitem>
701 <para>Displays a text file one screen full at a time</para>
702 <indexterm zone="ch-system-util-linux pg">
703 <primary sortas="b-pg">pg</primary>
704 </indexterm>
705 </listitem>
706 </varlistentry>
707
708 <varlistentry id="pivot_root">
709 <term><command>pivot_root</command></term>
710 <listitem>
711 <para>Makes the given file system the new root file system of the
712 current process</para>
713 <indexterm zone="ch-system-util-linux pivot_root">
714 <primary sortas="b-pivot_root">pivot_root</primary>
715 </indexterm>
716 </listitem>
717 </varlistentry>
718
719 <varlistentry id="readprofile">
720 <term><command>readprofile</command></term>
721 <listitem>
722 <para>Reads kernel profiling information</para>
723 <indexterm zone="ch-system-util-linux readprofile">
724 <primary sortas="b-readprofile">readprofile</primary>
725 </indexterm>
726 </listitem>
727 </varlistentry>
728
729 <varlistentry id="rename">
730 <term><command>rename</command></term>
731 <listitem>
732 <para>Renames the given files, replacing a given string with
733 another</para>
734 <indexterm zone="ch-system-util-linux rename">
735 <primary sortas="b-rename">rename</primary>
736 </indexterm>
737 </listitem>
738 </varlistentry>
739
740 <varlistentry id="renice">
741 <term><command>renice</command></term>
742 <listitem>
743 <para>Alters the priority of running processes</para>
744 <indexterm zone="ch-system-util-linux renice">
745 <primary sortas="b-renice">renice</primary>
746 </indexterm>
747 </listitem>
748 </varlistentry>
749
750 <varlistentry id="rev">
751 <term><command>rev</command></term>
752 <listitem>
753 <para>Reverses the lines of a given file</para>
754 <indexterm zone="ch-system-util-linux rev">
755 <primary sortas="b-rev">rev</primary>
756 </indexterm>
757 </listitem>
758 </varlistentry>
759
760 <varlistentry id="rtcwake">
761 <term><command>rtcwake</command></term>
762 <listitem>
763 <para>Enters a system sleep state until a specified wakeup time</para>
764 <indexterm zone="ch-system-util-linux rtcwake">
765 <primary sortas="b-rtcwake">rtcwake</primary>
766 </indexterm>
767 </listitem>
768 </varlistentry>
769
770 <varlistentry id="script">
771 <term><command>script</command></term>
772 <listitem>
773 <para>Makes a typescript of a terminal session</para>
774 <indexterm zone="ch-system-util-linux script">
775 <primary sortas="b-script">script</primary>
776 </indexterm>
777 </listitem>
778 </varlistentry>
779
780 <varlistentry id="scriptreplay">
781 <term><command>scriptreplay</command></term>
782 <listitem>
783 <para>Plays back typescripts created by <command>script</command></para>
784 <indexterm zone="ch-system-util-linux scriptreplay">
785 <primary sortas="b-scriptreplay">scriptreplay</primary>
786 </indexterm>
787 </listitem>
788 </varlistentry>
789
790 <varlistentry id="setarch">
791 <term><command>setarch</command></term>
792 <listitem>
793 <para>Changes reported architecture in new program environment and
794 sets personality flags</para>
795 <indexterm zone="ch-system-util-linux setarch">
796 <primary sortas="b-setarch">setarch</primary>
797 </indexterm>
798 </listitem>
799 </varlistentry>
800
801 <varlistentry id="setsid">
802 <term><command>setsid</command></term>
803 <listitem>
804 <para>Runs the given program in a new session</para>
805 <indexterm zone="ch-system-util-linux setsid">
806 <primary sortas="b-setsid">setsid</primary>
807 </indexterm>
808 </listitem>
809 </varlistentry>
810
811 <varlistentry id="setterm">
812 <term><command>setterm</command></term>
813 <listitem>
814 <para>Sets terminal attributes</para>
815 <indexterm zone="ch-system-util-linux setterm">
816 <primary sortas="b-setterm">setterm</primary>
817 </indexterm>
818 </listitem>
819 </varlistentry>
820
821 <varlistentry id="sfdisk">
822 <term><command>sfdisk</command></term>
823 <listitem>
824 <para>A disk partition table manipulator</para>
825 <indexterm zone="ch-system-util-linux sfdisk">
826 <primary sortas="b-sfdisk">sfdisk</primary>
827 </indexterm>
828 </listitem>
829 </varlistentry>
830
831 <varlistentry id="swaplabel">
832 <term><command>swaplabel</command></term>
833 <listitem>
834 <para>Prints or changes the label or UUID of a swap area</para>
835 <indexterm zone="ch-system-util-linux swaplabel">
836 <primary sortas="b-swaplabel">swaplabel</primary>
837 </indexterm>
838 </listitem>
839 </varlistentry>
840
841 <varlistentry id="swapoff">
842 <term><command>swapoff</command></term>
843 <listitem>
844 <para>Disables devices and files for paging and swapping</para>
845 <indexterm zone="ch-system-util-linux swapoff">
846 <primary sortas="b-swapoff">swapoff</primary>
847 </indexterm>
848 </listitem>
849 </varlistentry>
850
851 <varlistentry id="swapon">
852 <term><command>swapon</command></term>
853 <listitem>
854 <para>Enables devices and files for paging and swapping and
855 lists the devices and files currently in use</para>
856 <indexterm zone="ch-system-util-linux swapon">
857 <primary sortas="b-swapon">swapon</primary>
858 </indexterm>
859 </listitem>
860 </varlistentry>
861
862 <varlistentry id="switch_root">
863 <term><command>switch_root</command></term>
864 <listitem>
865 <para>Switches to another filesystem as the root of the mount tree</para>
866 <indexterm zone="ch-system-util-linux switch_root">
867 <primary sortas="b-switch_root">switch_root</primary>
868 </indexterm>
869 </listitem>
870 </varlistentry>
871
872 <varlistentry id="tailf">
873 <term><command>tailf</command></term>
874 <listitem>
875 <para>Tracks the growth of a log file. Displays the last 10 lines
876 of a log file, then continues displaying any new entries in the
877 log file as they are created</para>
878 <indexterm zone="ch-system-util-linux tailf">
879 <primary sortas="b-tailf">tailf</primary>
880 </indexterm>
881 </listitem>
882 </varlistentry>
883
884 <varlistentry id="taskset">
885 <term><command>taskset</command></term>
886 <listitem>
887 <para>Retrieves or sets a process's CPU affinity</para>
888 <indexterm zone="ch-system-util-linux taskset">
889 <primary sortas="b-taskset">taskset</primary>
890 </indexterm>
891 </listitem>
892 </varlistentry>
893
894 <varlistentry id="tunelp">
895 <term><command>tunelp</command></term>
896 <listitem>
897 <para>Tunes the parameters of the line printer</para>
898 <indexterm zone="ch-system-util-linux tunelp">
899 <primary sortas="b-tunelp">tunelp</primary>
900 </indexterm>
901 </listitem>
902 </varlistentry>
903
904 <varlistentry id="ul">
905 <term><command>ul</command></term>
906 <listitem>
907 <para>A filter for translating underscores into escape sequences
908 indicating underlining for the terminal in use</para>
909 <indexterm zone="ch-system-util-linux ul">
910 <primary sortas="b-ul">ul</primary>
911 </indexterm>
912 </listitem>
913 </varlistentry>
914
915 <varlistentry id="umount">
916 <term><command>umount</command></term>
917 <listitem>
918 <para>Disconnects a file system from the system's file tree</para>
919 <indexterm zone="ch-system-util-linux umount">
920 <primary sortas="b-umount">umount</primary>
921 </indexterm>
922 </listitem>
923 </varlistentry>
924
925 <varlistentry id="unshare">
926 <term><command>unshare</command></term>
927 <listitem>
928 <para>Runs a program with some namespaces unshared from parent</para>
929 <indexterm zone="ch-system-util-linux unshare">
930 <primary sortas="b-unshare">unshare</primary>
931 </indexterm>
932 </listitem>
933 </varlistentry>
934
935 <varlistentry id="uuidd">
936 <term><command>uuidd</command></term>
937 <listitem>
938 <para>A daemon used by the UUID library to generate time-based
939 UUIDs in a secure and guranteed-unique fashion.</para>
940 <indexterm zone="ch-system-util-linux uuidd">
941 <primary sortas="b-uuidd">uuidd</primary>
942 </indexterm>
943 </listitem>
944 </varlistentry>
945
946 <varlistentry id="uuidgen">
947 <term><command>uuidgen</command></term>
948 <listitem>
949 <para>Creates new UUIDs. Each new UUID can reasonably be considered
950 unique among all UUIDs created, on the local system and on other
951 systems, in the past and in the future</para>
952 <indexterm zone="ch-system-util-linux uuidgen">
953 <primary sortas="b-uuidgen">uuidgen</primary>
954 </indexterm>
955 </listitem>
956 </varlistentry>
957
958 <varlistentry id="whereis">
959 <term><command>whereis</command></term>
960 <listitem>
961 <para>Reports the location of the binary, source, and man page
962 for the given command</para>
963 <indexterm zone="ch-system-util-linux whereis">
964 <primary sortas="b-whereis">whereis</primary>
965 </indexterm>
966 </listitem>
967 </varlistentry>
968
969 <varlistentry id="wipefs">
970 <term><command>wipefs</command></term>
971 <listitem>
972 <para>Wipes a filesystem signature from a device</para>
973 <indexterm zone="ch-system-util-linux wipefs">
974 <primary sortas="b-wipefs">wipefs</primary>
975 </indexterm>
976 </listitem>
977 </varlistentry>
978
979 <varlistentry id="write">
980 <term><command>write</command></term>
981 <listitem>
982 <para>Sends a message to the given user <emphasis>if</emphasis> that
983 user has not disabled receipt of such messages</para>
984 <indexterm zone="ch-system-util-linux write">
985 <primary sortas="b-write">write</primary>
986 </indexterm>
987 </listitem>
988 </varlistentry>
989
990 <varlistentry id="libblkid">
991 <term><filename class="libraryfile">libblkid</filename></term>
992 <listitem>
993 <para>Contains routines for device identification and token
994 extraction</para>
995 <indexterm zone="ch-system-util-linux libblkid">
996 <primary sortas="c-libblkid">libblkid</primary>
997 </indexterm>
998 </listitem>
999 </varlistentry>
1000
1001 <varlistentry id="libmount">
1002 <term><filename class="libraryfile">libmount</filename></term>
1003 <listitem>
1004 <para>Contains routines for parsing the
1005 <filename>/etc/fstab</filename>, <filename>/etc/mtab</filename>,
1006 and <filename>/proc/self/mountinfo</filename> files, managing
1007 <filename>/etc/mtab</filename>, and configuring various mount
1008 options</para>
1009 <indexterm zone="ch-system-util-linux libmount">
1010 <primary sortas="c-libmount">libmount</primary>
1011 </indexterm>
1012 </listitem>
1013 </varlistentry>
1014
1015 <varlistentry id="libuuid">
1016 <term><filename class="libraryfile">libuuid</filename></term>
1017 <listitem>
1018 <para>Contains routines for generating unique identifiers for objects
1019 that may be accessible beyond the local system</para>
1020 <indexterm zone="ch-system-util-linux libuuid">
1021 <primary sortas="c-libuuid">libuuid</primary>
1022 </indexterm>
1023 </listitem>
1024 </varlistentry>
1025
1026 </variablelist>
1027
1028 </sect2>
1029
1030</sect1>
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