source: BOOK/final-system/common/util-linux.xml@ da28cc3

clfs-1.2 clfs-2.1 clfs-3.0.0-systemd clfs-3.0.0-sysvinit systemd sysvinit
Last change on this file since da28cc3 was 9fedd70f, checked in by Joe Ciccone <jciccone@…>, 14 years ago

Update Util-linux to 2.19-rc3.

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