source: clfs-sysroot/BOOK/final-system/common/coreutils.xml@ a55567a

Last change on this file since a55567a was 485c2de, checked in by Joe Ciccone <jciccone@…>, 18 years ago

Updated the uname patch to one that works on all architectures.
  • Property mode set to 100644
File size: 34.5 KB
Line 
1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
3 "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
4 <!ENTITY % general-entities SYSTEM "../../general.ent">
5 %general-entities;
6]>
7
8<sect1 id="ch-system-coreutils" role="wrap">
9 <?dbhtml filename="coreutils.html"?>
10
11 <title>Coreutils-&coreutils-version;</title>
12
13 <indexterm zone="ch-system-coreutils">
14 <primary sortas="a-Coreutils">Coreutils</primary>
15 </indexterm>
16
17 <sect2 role="package">
18 <title/>
19
20 <para>The Coreutils package contains utilities for showing and setting the
21 basic system characteristics.</para>
22
23 </sect2>
24
25 <sect2 role="installation">
26 <title>Installation of Coreutils</title>
27
28 <para os="p1">Prevent Coreutils from installing binaries that will be
29 installed by other packages:</para>
30
31<screen os="p2"><userinput>patch -Np1 -i ../&coreutils-suppress-patch;</userinput></screen>
32
33 <para os="p3">A known issue with the <command>uname</command> program from
34 this package is that the <option>-p</option> switch always
35 returns <computeroutput>unknown</computeroutput>. The following patch
36 fixes this behavior for all architectures:</para>
37
38<screen os="p4"><userinput>patch -Np1 -i ../&coreutils-uname-patch;</userinput></screen>
39
40 <para os="a">Configure doesn't properly handle the following tests
41 when cross-compiling:</para>
42
43<screen os="b"><userinput>echo "ac_cv_func_setvbuf_reversed=yes" &gt; config.cache
44echo "fu_cv_sys_stat_statfs2_bsize=yes" &gt;&gt; config.cache</userinput></screen>
45
46 <para os="c">Now prepare Coreutils for compilation:</para>
47
48<screen os="d"><userinput>./configure --build=${CLFS_HOST} --host=${CLFS_TARGET} \
49 --prefix=/usr --cache-file=config.cache </userinput></screen>
50
51 <para os="e">Compile the package:</para>
52
53<screen os="f"><userinput>make</userinput></screen>
54
55 <para os="g">Install the package:</para>
56
57<screen os="h"><userinput>make DESTDIR=${CLFS} install</userinput></screen>
58
59 <para os="i">Move programs to the locations specified by the FHS:</para>
60
61<screen os="j"><userinput>mv -v ${CLFS}/usr/bin/{cat,chgrp,chmod,chown,cp,date} ${CLFS}/bin
62mv -v ${CLFS}/usr/bin/{dd,df,echo,false,hostname,ln,ls,mkdir,mknod} ${CLFS}/bin
63mv -v ${CLFS}/usr/bin/{mv,pwd,rm,rmdir,stty,true,uname} ${CLFS}/bin
64mv -v ${CLFS}/usr/bin/chroot ${CLFS}/usr/sbin</userinput></screen>
65
66 <para os="k">Other Coreutils programs are used by some of the scripts
67 in the CLFS-Bootscripts pacakge. As <filename
68 class="directory">/usr</filename> may not be available during the early
69 stages of booting, those binaries need to be on the root partition:</para>
70
71<screen os="l"><userinput>mv -v ${CLFS}/usr/bin/{[,basename,head,install,nice} ${CLFS}/bin
72mv -v ${CLFS}/usr/bin/{readlink,sleep,sync,test,touch} ${CLFS}/bin
73ln -svf ../../bin/install ${CLFS}/usr/bin</userinput></screen>
74
75 </sect2>
76
77 <sect2 id="contents-coreutils" role="content">
78 <title>Contents of Coreutils</title>
79
80 <segmentedlist>
81 <segtitle>Installed programs</segtitle>
82
83 <seglistitem>
84 <seg>[, basename, cat, chgrp, chmod, chown, chroot, cksum,
85 comm, cp, csplit, cut, date, dd, df, dir, dircolors, dirname, du,
86 echo, env, expand, expr, factor, false, fmt, fold, groups, head,
87 hostid, hostname, id, install, join, link, ln, logname, ls, md5sum,
88 mkdir, mkfifo, mknod, mv, nice, nl, nohup, od, paste, pathchk, pinky,
89 pr, printenv, printf, ptx, pwd, readlink, rm, rmdir, seq, sha1sum,
90 shred, sleep, sort, split, stat, stty, sum, sync, tac, tail, tee,
91 test, touch, tr, true, tsort, tty, uname, unexpand, uniq, unlink,
92 users, vdir, wc, who, whoami, and yes</seg>
93 </seglistitem>
94 </segmentedlist>
95
96 <variablelist>
97 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
98 <?dbfo list-presentation="list"?>
99 <?dbhtml list-presentation="table"?>
100
101 <varlistentry id="basename">
102 <term><command>basename</command></term>
103 <listitem>
104 <para>Strips any path and a given suffix from a file name</para>
105 <indexterm zone="ch-system-coreutils basename">
106 <primary sortas="b-basename">basename</primary>
107 </indexterm>
108 </listitem>
109 </varlistentry>
110
111 <varlistentry id="cat">
112 <term><command>cat</command></term>
113 <listitem>
114 <para>Concatenates files to standard output</para>
115 <indexterm zone="ch-system-coreutils cat">
116 <primary sortas="b-cat">cat</primary>
117 </indexterm>
118 </listitem>
119 </varlistentry>
120
121 <varlistentry id="chgrp">
122 <term><command>chgrp</command></term>
123 <listitem>
124 <para>Changes the group ownership of files and directories</para>
125 <indexterm zone="ch-system-coreutils chgrp">
126 <primary sortas="b-chgrp">chgrp</primary>
127 </indexterm>
128 </listitem>
129 </varlistentry>
130
131 <varlistentry id="chmod">
132 <term><command>chmod</command></term>
133 <listitem>
134 <para>Changes the permissions of each file to the given mode; the mode
135 can be either a symbolic representation of the changes to make or an
136 octal number representing the new permissions</para>
137 <indexterm zone="ch-system-coreutils chmod">
138 <primary sortas="b-chmod">chmod</primary>
139 </indexterm>
140 </listitem>
141 </varlistentry>
142
143 <varlistentry id="chown">
144 <term><command>chown</command></term>
145 <listitem>
146 <para>Changes the user and/or group ownership of files and
147 directories</para>
148 <indexterm zone="ch-system-coreutils chown">
149 <primary sortas="b-chown">chown</primary>
150 </indexterm>
151 </listitem>
152 </varlistentry>
153
154 <varlistentry id="chroot">
155 <term><command>chroot</command></term>
156 <listitem>
157 <para>Runs a command with the specified directory as the
158 <filename class="directory">/</filename> directory</para>
159 <indexterm zone="ch-system-coreutils chroot">
160 <primary sortas="b-chroot">chroot</primary>
161 </indexterm>
162 </listitem>
163 </varlistentry>
164
165 <varlistentry id="cksum">
166 <term><command>cksum</command></term>
167 <listitem>
168 <para>Prints the Cyclic Redundancy Check (CRC) checksum and the byte
169 counts of each specified file</para>
170 <indexterm zone="ch-system-coreutils cksum">
171 <primary sortas="b-cksum">cksum</primary>
172 </indexterm>
173 </listitem>
174 </varlistentry>
175
176 <varlistentry id="comm">
177 <term><command>comm</command></term>
178 <listitem>
179 <para>Compares two sorted files, outputting in three columns the lines
180 that are unique and the lines that are common</para>
181 <indexterm zone="ch-system-coreutils comm">
182 <primary sortas="b-comm">comm</primary>
183 </indexterm>
184 </listitem>
185 </varlistentry>
186
187 <varlistentry id="cp">
188 <term><command>cp</command></term>
189 <listitem>
190 <para>Copies files</para>
191 <indexterm zone="ch-system-coreutils cp">
192 <primary sortas="b-cp">cp</primary>
193 </indexterm>
194 </listitem>
195 </varlistentry>
196
197 <varlistentry id="csplit">
198 <term><command>csplit</command></term>
199 <listitem>
200 <para>Splits a given file into several new files, separating them
201 according to given patterns or line numbers and outputting the byte
202 count of each new file</para>
203 <indexterm zone="ch-system-coreutils csplit">
204 <primary sortas="b-csplit">csplit</primary>
205 </indexterm>
206 </listitem>
207 </varlistentry>
208
209 <varlistentry id="cut">
210 <term><command>cut</command></term>
211 <listitem>
212 <para>Prints sections of lines, selecting the parts according to given
213 fields or positions</para>
214 <indexterm zone="ch-system-coreutils cut">
215 <primary sortas="b-cut">cut</primary>
216 </indexterm>
217 </listitem>
218 </varlistentry>
219
220 <varlistentry id="date">
221 <term><command>date</command></term>
222 <listitem>
223 <para>Displays the current time in the given format, or sets the
224 system date</para>
225 <indexterm zone="ch-system-coreutils date">
226 <primary sortas="b-date">date</primary>
227 </indexterm>
228 </listitem>
229 </varlistentry>
230
231 <varlistentry id="dd">
232 <term><command>dd</command> </term>
233 <listitem>
234 <para>Copies a file using the given block size and count, while
235 optionally performing conversions on it</para>
236 <indexterm zone="ch-system-coreutils dd">
237 <primary sortas="b-dd">dd</primary>
238 </indexterm>
239 </listitem>
240 </varlistentry>
241
242 <varlistentry id="df">
243 <term><command>df</command></term>
244 <listitem>
245 <para>Reports the amount of disk space available (and used) on all
246 mounted file systems, or only on the file systems holding the selected
247 files</para>
248 <indexterm zone="ch-system-coreutils df">
249 <primary sortas="b-df">df</primary>
250 </indexterm>
251 </listitem>
252 </varlistentry>
253
254 <varlistentry id="dir">
255 <term><command>dir</command></term>
256 <listitem>
257 <para>Lists the contents of each given directory (the same as
258 the <command>ls</command> command)</para>
259 <indexterm zone="ch-system-coreutils dir">
260 <primary sortas="b-dir">dir</primary>
261 </indexterm>
262 </listitem>
263 </varlistentry>
264
265 <varlistentry id="dircolors">
266 <term><command>dircolors</command></term>
267 <listitem>
268 <para>Outputs commands to set the <envar>LS_COLOR</envar>
269 environment variable to change the color scheme used by
270 <command>ls</command></para>
271 <indexterm zone="ch-system-coreutils dircolors">
272 <primary sortas="b-dircolors">dircolors</primary>
273 </indexterm>
274 </listitem>
275 </varlistentry>
276
277 <varlistentry id="dirname">
278 <term><command>dirname</command></term>
279 <listitem>
280 <para>Strips the non-directory suffix from a file name</para>
281 <indexterm zone="ch-system-coreutils dirname">
282 <primary sortas="b-dirname">dirname</primary>
283 </indexterm>
284 </listitem>
285 </varlistentry>
286
287 <varlistentry id="du">
288 <term><command>du</command></term>
289 <listitem>
290 <para>Reports the amount of disk space used by the current directory,
291 by each of the given directories (including all subdirectories) or by
292 each of the given files</para>
293 <indexterm zone="ch-system-coreutils du">
294 <primary sortas="b-du">du</primary>
295 </indexterm>
296 </listitem>
297 </varlistentry>
298
299 <varlistentry id="echo">
300 <term><command>echo</command></term>
301 <listitem>
302 <para>Displays the given strings</para>
303 <indexterm zone="ch-system-coreutils echo">
304 <primary sortas="b-echo">echo</primary>
305 </indexterm>
306 </listitem>
307 </varlistentry>
308
309 <varlistentry id="env">
310 <term><command>env</command></term>
311 <listitem>
312 <para>Runs a command in a modified environment</para>
313 <indexterm zone="ch-system-coreutils env">
314 <primary sortas="b-env">env</primary>
315 </indexterm>
316 </listitem>
317 </varlistentry>
318
319 <varlistentry id="expand">
320 <term><command>expand</command></term>
321 <listitem>
322 <para>Converts tabs to spaces</para>
323 <indexterm zone="ch-system-coreutils expand">
324 <primary sortas="b-expand">expand</primary>
325 </indexterm>
326 </listitem>
327 </varlistentry>
328
329 <varlistentry id="expr">
330 <term><command>expr</command></term>
331 <listitem>
332 <para>Evaluates expressions</para>
333 <indexterm zone="ch-system-coreutils expr">
334 <primary sortas="b-expr">expr</primary>
335 </indexterm>
336 </listitem>
337 </varlistentry>
338
339 <varlistentry id="factor">
340 <term><command>factor</command></term>
341 <listitem>
342 <para>Prints the prime factors of all specified integer numbers</para>
343 <indexterm zone="ch-system-coreutils factor">
344 <primary sortas="b-factor">factor</primary>
345 </indexterm>
346 </listitem>
347 </varlistentry>
348
349 <varlistentry id="false">
350 <term><command>false</command></term>
351 <listitem>
352 <para>Does nothing, unsuccessfully; it always exits with a status code
353 indicating failure</para>
354 <indexterm zone="ch-system-coreutils false">
355 <primary sortas="b-false">false</primary>
356 </indexterm>
357 </listitem>
358 </varlistentry>
359
360 <varlistentry id="fmt">
361 <term><command>fmt</command></term>
362 <listitem>
363 <para>Reformats the paragraphs in the given files</para>
364 <indexterm zone="ch-system-coreutils fmt">
365 <primary sortas="b-fmt">fmt</primary>
366 </indexterm>
367 </listitem>
368 </varlistentry>
369
370 <varlistentry id="fold">
371 <term><command>fold</command></term>
372 <listitem>
373 <para>Wraps the lines in the given files</para>
374 <indexterm zone="ch-system-coreutils fold">
375 <primary sortas="b-fold">fold</primary>
376 </indexterm>
377 </listitem>
378 </varlistentry>
379
380 <varlistentry id="groups">
381 <term><command>groups</command></term>
382 <listitem>
383 <para>Reports a user's group memberships</para>
384 <indexterm zone="ch-system-coreutils groups">
385 <primary sortas="b-groups">groups</primary>
386 </indexterm>
387 </listitem>
388 </varlistentry>
389
390 <varlistentry id="head">
391 <term><command>head</command></term>
392 <listitem>
393 <para>Prints the first ten lines (or the given number of lines)
394 of each given file</para>
395 <indexterm zone="ch-system-coreutils head">
396 <primary sortas="b-head">head</primary>
397 </indexterm>
398 </listitem>
399 </varlistentry>
400
401 <varlistentry id="hostid">
402 <term><command>hostid</command></term>
403 <listitem>
404 <para>Reports the numeric identifier (in hexadecimal) of the host</para>
405 <indexterm zone="ch-system-coreutils hostid">
406 <primary sortas="b-hostid">hostid</primary>
407 </indexterm>
408 </listitem>
409 </varlistentry>
410
411 <varlistentry id="hostname">
412 <term><command>hostname</command></term>
413 <listitem>
414 <para>Reports or sets the name of the host</para>
415 <indexterm zone="ch-system-coreutils hostname">
416 <primary sortas="b-hostname">hostname</primary>
417 </indexterm>
418 </listitem>
419 </varlistentry>
420
421 <varlistentry id="id">
422 <term><command>id</command></term>
423 <listitem>
424 <para>Reports the effective user ID, group ID, and group memberships
425 of the current user or specified user</para>
426 <indexterm zone="ch-system-coreutils id">
427 <primary sortas="b-id">id</primary>
428 </indexterm>
429 </listitem>
430 </varlistentry>
431
432 <varlistentry id="install">
433 <term><command>install</command> </term>
434 <listitem>
435 <para>Copies files while setting their permission modes and, if
436 possible, their owner and group</para>
437 <indexterm zone="ch-system-coreutils install">
438 <primary sortas="b-install">install</primary>
439 </indexterm>
440 </listitem>
441 </varlistentry>
442
443 <varlistentry id="join">
444 <term><command>join</command></term>
445 <listitem>
446 <para>Joins the lines that have identical join fields from two
447 separate files</para>
448 <indexterm zone="ch-system-coreutils join">
449 <primary sortas="b-join">join</primary>
450 </indexterm>
451 </listitem>
452 </varlistentry>
453
454 <varlistentry id="link">
455 <term><command>link</command></term>
456 <listitem>
457 <para>Creates a hard link with the given name to a file</para>
458 <indexterm zone="ch-system-coreutils link">
459 <primary sortas="b-link">link</primary>
460 </indexterm>
461 </listitem>
462 </varlistentry>
463
464 <varlistentry id="ln">
465 <term><command>ln</command></term>
466 <listitem>
467 <para>Makes hard links or soft (symbolic) links between files</para>
468 <indexterm zone="ch-system-coreutils ln">
469 <primary sortas="b-ln">ln</primary>
470 </indexterm>
471 </listitem>
472 </varlistentry>
473
474 <varlistentry id="logname">
475 <term><command>logname</command></term>
476 <listitem>
477 <para>Reports the current user's login name</para>
478 <indexterm zone="ch-system-coreutils logname">
479 <primary sortas="b-logname">logname</primary>
480 </indexterm>
481 </listitem>
482 </varlistentry>
483
484 <varlistentry id="ls">
485 <term><command>ls</command></term>
486 <listitem>
487 <para>Lists the contents of each given directory</para>
488 <indexterm zone="ch-system-coreutils ls">
489 <primary sortas="b-ls">ls</primary>
490 </indexterm>
491 </listitem>
492 </varlistentry>
493
494 <varlistentry id="md5sum">
495 <term><command>md5sum</command></term>
496 <listitem>
497 <para>Reports or checks Message Digest 5 (MD5) checksums</para>
498 <indexterm zone="ch-system-coreutils md5sum">
499 <primary sortas="b-md5sum">md5sum</primary>
500 </indexterm>
501 </listitem>
502 </varlistentry>
503
504 <varlistentry id="mkdir">
505 <term><command>mkdir</command></term>
506 <listitem>
507 <para>Creates directories with the given names</para>
508 <indexterm zone="ch-system-coreutils mkdir">
509 <primary sortas="b-mkdir">mkdir</primary>
510 </indexterm>
511 </listitem>
512 </varlistentry>
513
514 <varlistentry id="mkfifo">
515 <term><command>mkfifo</command></term>
516 <listitem>
517 <para>Creates First-In, First-Outs (FIFOs), a <quote>named
518 pipe</quote> in UNIX parlance, with the given names</para>
519 <indexterm zone="ch-system-coreutils mkfifo">
520 <primary sortas="b-mkfifo">mkfifo</primary>
521 </indexterm>
522 </listitem>
523 </varlistentry>
524
525 <varlistentry id="mknod">
526 <term><command>mknod</command></term>
527 <listitem>
528 <para>Creates device nodes with the given names; a device node is a
529 character special file, a block special file, or a FIFO</para>
530 <indexterm zone="ch-system-coreutils mknod">
531 <primary sortas="b-mknod">mknod</primary>
532 </indexterm>
533 </listitem>
534 </varlistentry>
535
536 <varlistentry id="mv">
537 <term><command>mv</command></term>
538 <listitem>
539 <para>Moves or renames files or directories</para>
540 <indexterm zone="ch-system-coreutils mv">
541 <primary sortas="b-mv">mv</primary>
542 </indexterm>
543 </listitem>
544 </varlistentry>
545
546 <varlistentry id="nice">
547 <term><command>nice</command></term>
548 <listitem>
549 <para>Runs a program with modified scheduling priority</para>
550 <indexterm zone="ch-system-coreutils nice">
551 <primary sortas="b-nice">nice</primary>
552 </indexterm>
553 </listitem>
554 </varlistentry>
555
556 <varlistentry id="nl">
557 <term><command>nl</command></term>
558 <listitem>
559 <para>Numbers the lines from the given files</para>
560 <indexterm zone="ch-system-coreutils nl">
561 <primary sortas="b-nl">nl</primary>
562 </indexterm>
563 </listitem>
564 </varlistentry>
565
566 <varlistentry id="nohup">
567 <term><command>nohup</command></term>
568 <listitem>
569 <para>Runs a command immune to hangups, with its output redirected to
570 a log file</para>
571 <indexterm zone="ch-system-coreutils nohup">
572 <primary sortas="b-nohup">nohup</primary>
573 </indexterm>
574 </listitem>
575 </varlistentry>
576
577 <varlistentry id="od">
578 <term><command>od</command></term>
579 <listitem>
580 <para>Dumps files in octal and other formats</para>
581 <indexterm zone="ch-system-coreutils od">
582 <primary sortas="b-od">od</primary>
583 </indexterm>
584 </listitem>
585 </varlistentry>
586
587 <varlistentry id="paste">
588 <term><command>paste</command></term>
589 <listitem>
590 <para>Merges the given files, joining sequentially corresponding lines
591 side by side, separated by tab characters</para>
592 <indexterm zone="ch-system-coreutils paste">
593 <primary sortas="b-paste">paste</primary>
594 </indexterm>
595 </listitem>
596 </varlistentry>
597
598 <varlistentry id="pathchk">
599 <term><command>pathchk</command></term>
600 <listitem>
601 <para>Checks if file names are valid or portable</para>
602 <indexterm zone="ch-system-coreutils pathchk">
603 <primary sortas="b-pathchk">pathchk</primary>
604 </indexterm>
605 </listitem>
606 </varlistentry>
607
608 <varlistentry id="pinky">
609 <term><command>pinky</command></term>
610 <listitem>
611 <para>Is a lightweight finger client; it reports some information
612 about the given users</para>
613 <indexterm zone="ch-system-coreutils pinky">
614 <primary sortas="b-pinky">pinky</primary>
615 </indexterm>
616 </listitem>
617 </varlistentry>
618
619 <varlistentry id="pr">
620 <term><command>pr</command></term>
621 <listitem>
622 <para>Paginates and columnates files for printing</para>
623 <indexterm zone="ch-system-coreutils pr">
624 <primary sortas="b-pr">pr</primary>
625 </indexterm>
626 </listitem>
627 </varlistentry>
628
629 <varlistentry id="printenv">
630 <term><command>printenv</command></term>
631 <listitem>
632 <para>Prints the environment</para>
633 <indexterm zone="ch-system-coreutils printenv">
634 <primary sortas="b-printenv">printenv</primary>
635 </indexterm>
636 </listitem>
637 </varlistentry>
638
639 <varlistentry id="printf">
640 <term><command>printf</command></term>
641 <listitem>
642 <para>Prints the given arguments according to the given format, much
643 like the C printf function</para>
644 <indexterm zone="ch-system-coreutils printf">
645 <primary sortas="b-printf">printf</primary>
646 </indexterm>
647 </listitem>
648 </varlistentry>
649
650 <varlistentry id="ptx">
651 <term><command>ptx</command></term>
652 <listitem>
653 <para>Produces a permuted index from the contents of the given files,
654 with each keyword in its context</para>
655 <indexterm zone="ch-system-coreutils ptx">
656 <primary sortas="b-ptx">ptx</primary>
657 </indexterm>
658 </listitem>
659 </varlistentry>
660
661 <varlistentry id="pwd">
662 <term><command>pwd</command></term>
663 <listitem>
664 <para>Reports the name of the current working directory</para>
665 <indexterm zone="ch-system-coreutils pwd">
666 <primary sortas="b-pwd">pwd</primary>
667 </indexterm>
668 </listitem>
669 </varlistentry>
670
671 <varlistentry id="readlink">
672 <term><command>readlink</command></term>
673 <listitem>
674 <para>Reports the value of the given symbolic link</para>
675 <indexterm zone="ch-system-coreutils readlink">
676 <primary sortas="b-readlink">readlink</primary>
677 </indexterm>
678 </listitem>
679 </varlistentry>
680
681 <varlistentry id="rm">
682 <term><command>rm</command></term>
683 <listitem>
684 <para>Removes files or directories</para>
685 <indexterm zone="ch-system-coreutils rm">
686 <primary sortas="b-rm">rm</primary>
687 </indexterm>
688 </listitem>
689 </varlistentry>
690
691 <varlistentry id="rmdir">
692 <term><command>rmdir</command></term>
693 <listitem>
694 <para>Removes directories if they are empty</para>
695 <indexterm zone="ch-system-coreutils rmdir">
696 <primary sortas="b-rmdir">rmdir</primary>
697 </indexterm>
698 </listitem>
699 </varlistentry>
700
701 <varlistentry id="seq">
702 <term><command>seq</command></term>
703 <listitem>
704 <para>Prints a sequence of numbers within a given range and with a
705 given increment</para>
706 <indexterm zone="ch-system-coreutils seq">
707 <primary sortas="b-seq">seq</primary>
708 </indexterm>
709 </listitem>
710 </varlistentry>
711
712 <varlistentry id="sha1sum">
713 <term><command>sha1sum</command></term>
714 <listitem>
715 <para>Prints or checks 160-bit Secure Hash Algorithm 1 (SHA1)
716 checksums</para>
717 <indexterm zone="ch-system-coreutils sha1sum">
718 <primary sortas="b-sha1sum">sha1sum</primary>
719 </indexterm>
720 </listitem>
721 </varlistentry>
722
723 <varlistentry id="shred">
724 <term><command>shred</command></term>
725 <listitem>
726 <para>Overwrites the given files repeatedly with complex patterns,
727 making it difficult to recover the data</para>
728 <indexterm zone="ch-system-coreutils shred">
729 <primary sortas="b-shred">shred</primary>
730 </indexterm>
731 </listitem>
732 </varlistentry>
733
734 <varlistentry id="sleep">
735 <term><command>sleep</command></term>
736 <listitem>
737 <para>Pauses for the given amount of time</para>
738 <indexterm zone="ch-system-coreutils sleep">
739 <primary sortas="b-sleep">sleep</primary>
740 </indexterm>
741 </listitem>
742 </varlistentry>
743
744 <varlistentry id="sort">
745 <term><command>sort</command></term>
746 <listitem>
747 <para>Sorts the lines from the given files</para>
748 <indexterm zone="ch-system-coreutils sort">
749 <primary sortas="b-sort">sort</primary>
750 </indexterm>
751 </listitem>
752 </varlistentry>
753
754 <varlistentry id="split">
755 <term><command>split</command></term>
756 <listitem>
757 <para>Splits the given file into pieces, by size or by number of
758 lines</para>
759 <indexterm zone="ch-system-coreutils split">
760 <primary sortas="b-split">split</primary>
761 </indexterm>
762 </listitem>
763 </varlistentry>
764
765 <varlistentry id="stat">
766 <term><command>stat</command></term>
767 <listitem>
768 <para>Displays file or filesystem status</para>
769 <indexterm zone="ch-system-coreutils stat">
770 <primary sortas="b-stat">stat</primary>
771 </indexterm>
772 </listitem>
773 </varlistentry>
774
775 <varlistentry id="stty">
776 <term><command>stty</command></term>
777 <listitem>
778 <para>Sets or reports terminal line settings</para>
779 <indexterm zone="ch-system-coreutils stty">
780 <primary sortas="b-stty">stty</primary>
781 </indexterm>
782 </listitem>
783 </varlistentry>
784
785 <varlistentry id="sum">
786 <term><command>sum</command></term>
787 <listitem>
788 <para>Prints checksum and block counts for each given file</para>
789 <indexterm zone="ch-system-coreutils sum">
790 <primary sortas="b-sum">sum</primary>
791 </indexterm>
792 </listitem>
793 </varlistentry>
794
795 <varlistentry id="sync">
796 <term><command>sync</command></term>
797 <listitem>
798 <para>Flushes file system buffers; it forces changed blocks to disk
799 and updates the super block</para>
800 <indexterm zone="ch-system-coreutils sync">
801 <primary sortas="b-sync">sync</primary>
802 </indexterm>
803 </listitem>
804 </varlistentry>
805
806 <varlistentry id="tac">
807 <term><command>tac</command></term>
808 <listitem>
809 <para>Concatenates the given files in reverse</para>
810 <indexterm zone="ch-system-coreutils tac">
811 <primary sortas="b-tac">tac</primary>
812 </indexterm>
813 </listitem>
814 </varlistentry>
815
816 <varlistentry id="tail">
817 <term><command>tail</command></term>
818 <listitem>
819 <para>Prints the last ten lines (or the given number of lines) of each
820 given file</para>
821 <indexterm zone="ch-system-coreutils tail">
822 <primary sortas="b-tail">tail</primary>
823 </indexterm>
824 </listitem>
825 </varlistentry>
826
827 <varlistentry id="tee">
828 <term><command>tee</command></term>
829 <listitem>
830 <para>Reads from standard input while writing both to standard output
831 and to the given files</para>
832 <indexterm zone="ch-system-coreutils tee">
833 <primary sortas="b-tee">tee</primary>
834 </indexterm>
835 </listitem>
836 </varlistentry>
837
838 <varlistentry id="test">
839 <term><command>test</command> or <command>[</command></term>
840 <listitem>
841 <para>Compares values and checks file types</para>
842 <indexterm zone="ch-system-coreutils test">
843 <primary sortas="b-test">test</primary>
844 </indexterm>
845 </listitem>
846 </varlistentry>
847
848 <varlistentry id="touch">
849 <term><command>touch</command></term>
850 <listitem>
851 <para>Changes file timestamps, setting the access and modification
852 times of the given files to the current time; files that do not exist
853 are created with zero length</para>
854 <indexterm zone="ch-system-coreutils touch">
855 <primary sortas="b-touch">touch</primary>
856 </indexterm>
857 </listitem>
858 </varlistentry>
859
860 <varlistentry id="tr">
861 <term><command>tr</command></term>
862 <listitem>
863 <para>Translates, squeezes, and deletes the given characters from
864 standard input</para>
865 <indexterm zone="ch-system-coreutils tr">
866 <primary sortas="b-tr">tr</primary>
867 </indexterm>
868 </listitem>
869 </varlistentry>
870
871 <varlistentry id="true">
872 <term><command>true</command></term>
873 <listitem>
874 <para>Does nothing, successfully; it always exits with a status code
875 indicating success</para>
876 <indexterm zone="ch-system-coreutils true">
877 <primary sortas="b-true">true</primary>
878 </indexterm>
879 </listitem>
880 </varlistentry>
881
882 <varlistentry id="tsort">
883 <term><command>tsort</command></term>
884 <listitem>
885 <para>Performs a topological sort; it writes a completely ordered list
886 according to the partial ordering in a given file</para>
887 <indexterm zone="ch-system-coreutils tsort">
888 <primary sortas="b-tsort">tsort</primary>
889 </indexterm>
890 </listitem>
891 </varlistentry>
892
893 <varlistentry id="tty">
894 <term><command>tty</command></term>
895 <listitem>
896 <para>Reports the file name of the terminal connected to standard
897 input</para>
898 <indexterm zone="ch-system-coreutils tty">
899 <primary sortas="b-tty">tty</primary>
900 </indexterm>
901 </listitem>
902 </varlistentry>
903
904 <varlistentry id="uname">
905 <term><command>uname</command></term>
906 <listitem>
907 <para>Reports system information</para>
908 <indexterm zone="ch-system-coreutils uname">
909 <primary sortas="b-uname">uname</primary>
910 </indexterm>
911 </listitem>
912 </varlistentry>
913
914 <varlistentry id="unexpand">
915 <term><command>unexpand</command></term>
916 <listitem>
917 <para>Converts spaces to tabs</para>
918 <indexterm zone="ch-system-coreutils unexpand">
919 <primary sortas="b-unexpand">unexpand</primary>
920 </indexterm>
921 </listitem>
922 </varlistentry>
923
924 <varlistentry id="uniq">
925 <term><command>uniq</command></term>
926 <listitem>
927 <para>Discards all but one of successive identical lines</para>
928 <indexterm zone="ch-system-coreutils uniq">
929 <primary sortas="b-uniq">uniq</primary>
930 </indexterm>
931 </listitem>
932 </varlistentry>
933
934 <varlistentry id="unlink">
935 <term><command>unlink</command></term>
936 <listitem>
937 <para>Removes the given file</para>
938 <indexterm zone="ch-system-coreutils unlink">
939 <primary sortas="b-unlink">unlink</primary>
940 </indexterm>
941 </listitem>
942 </varlistentry>
943
944 <varlistentry id="users">
945 <term><command>users</command></term>
946 <listitem>
947 <para>Reports the names of the users currently logged on</para>
948 <indexterm zone="ch-system-coreutils users">
949 <primary sortas="b-users">users</primary>
950 </indexterm>
951 </listitem>
952 </varlistentry>
953
954 <varlistentry id="vdir">
955 <term><command>vdir</command></term>
956 <listitem>
957 <para>Is the same as <command>ls -l</command></para>
958 <indexterm zone="ch-system-coreutils vdir">
959 <primary sortas="b-vdir">vdir</primary>
960 </indexterm>
961 </listitem>
962 </varlistentry>
963
964 <varlistentry id="wc">
965 <term><command>wc</command></term>
966 <listitem>
967 <para>Reports the number of lines, words, and bytes for each given
968 file, as well as a total line when more than one file is given</para>
969 <indexterm zone="ch-system-coreutils wc">
970 <primary sortas="b-wc">wc</primary>
971 </indexterm>
972 </listitem>
973 </varlistentry>
974
975 <varlistentry id="who">
976 <term><command>who</command></term>
977 <listitem>
978 <para>Reports who is logged on</para>
979 <indexterm zone="ch-system-coreutils who">
980 <primary sortas="b-who">who</primary>
981 </indexterm>
982 </listitem>
983 </varlistentry>
984
985 <varlistentry id="whoami">
986 <term><command>whoami</command></term>
987 <listitem>
988 <para>Reports the user name associated with the current effective
989 user ID</para>
990 <indexterm zone="ch-system-coreutils whoami">
991 <primary sortas="b-whoami">whoami</primary>
992 </indexterm>
993 </listitem>
994 </varlistentry>
995
996 <varlistentry id="yes">
997 <term><command>yes</command></term>
998 <listitem>
999 <para>Repeatedly outputs <quote>y</quote> or a given string until
1000 killed</para>
1001 <indexterm zone="ch-system-coreutils yes">
1002 <primary sortas="b-yes">yes</primary>
1003 </indexterm>
1004 </listitem>
1005 </varlistentry>
1006
1007 </variablelist>
1008
1009 </sect2>
1010
1011</sect1>
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