source: BOOK/final-system/common/util-linux.xml@ d2759bb

clfs-3.0.0-systemd clfs-3.0.0-sysvinit systemd sysvinit
Last change on this file since d2759bb was 4ce7c10, checked in by Joe Ciccone <jciccone@…>, 14 years ago

Merge branch 'master' into systemd

Conflicts:

BOOK/final-system/multilib/util-linux-64bit.xml
BOOK/final-system/multilib/util-linux-n32.xml
BOOK/final-system/multilib/util-linux.xml

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