source: clfs-sysroot/BOOK/final-system/common/coreutils.xml@ a7ad47f

Last change on this file since a7ad47f was 0c2cb0b, checked in by Joe Ciccone <jciccone@…>, 18 years ago

Fix a typo.
  • Property mode set to 100644
File size: 34.9 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="aa">When the uname patch was applied. A change was made to
41 <filename>uname.c</filename>. This change is causing the man Makefile to
42 try and regenerate the man page for uname. Since the compiled uname can
43 not be executed the build will fail. The following command gives the uname
44 man page a newer timestamp then <filename>uname.c</filename>.</para>
45
46<screen os="ab"><userinput>touch man/uname.1</userinput></screen>
47
48 <para os="a">Configure doesn't properly handle the following tests
49 when cross-compiling:</para>
50
51<screen os="b"><userinput>echo "ac_cv_func_setvbuf_reversed=yes" &gt; config.cache
52echo "fu_cv_sys_stat_statfs2_bsize=yes" &gt;&gt; config.cache</userinput></screen>
53
54 <para os="c">Now prepare Coreutils for compilation:</para>
55
56<screen os="d"><userinput>./configure --build=${CLFS_HOST} --host=${CLFS_TARGET} \
57 --prefix=/usr --cache-file=config.cache </userinput></screen>
58
59 <para os="e">Compile the package:</para>
60
61<screen os="f"><userinput>make</userinput></screen>
62
63 <para os="g">Install the package:</para>
64
65<screen os="h"><userinput>make DESTDIR=${CLFS} install</userinput></screen>
66
67 <para os="i">Move programs to the locations specified by the FHS:</para>
68
69<screen os="j"><userinput>mv -v ${CLFS}/usr/bin/{cat,chgrp,chmod,chown,cp,date} ${CLFS}/bin
70mv -v ${CLFS}/usr/bin/{dd,df,echo,false,hostname,ln,ls,mkdir,mknod} ${CLFS}/bin
71mv -v ${CLFS}/usr/bin/{mv,pwd,rm,rmdir,stty,true,uname} ${CLFS}/bin
72mv -v ${CLFS}/usr/bin/chroot ${CLFS}/usr/sbin</userinput></screen>
73
74 <para os="k">Other Coreutils programs are used by some of the scripts
75 in the CLFS-Bootscripts pacakge. As <filename
76 class="directory">/usr</filename> may not be available during the early
77 stages of booting, those binaries need to be on the root partition:</para>
78
79<screen os="l"><userinput>mv -v ${CLFS}/usr/bin/{[,basename,head,install,nice} ${CLFS}/bin
80mv -v ${CLFS}/usr/bin/{readlink,sleep,sync,test,touch} ${CLFS}/bin
81ln -svf ../../bin/install ${CLFS}/usr/bin</userinput></screen>
82
83 </sect2>
84
85 <sect2 id="contents-coreutils" role="content">
86 <title>Contents of Coreutils</title>
87
88 <segmentedlist>
89 <segtitle>Installed programs</segtitle>
90
91 <seglistitem>
92 <seg>[, basename, cat, chgrp, chmod, chown, chroot, cksum,
93 comm, cp, csplit, cut, date, dd, df, dir, dircolors, dirname, du,
94 echo, env, expand, expr, factor, false, fmt, fold, groups, head,
95 hostid, hostname, id, install, join, link, ln, logname, ls, md5sum,
96 mkdir, mkfifo, mknod, mv, nice, nl, nohup, od, paste, pathchk, pinky,
97 pr, printenv, printf, ptx, pwd, readlink, rm, rmdir, seq, sha1sum,
98 shred, sleep, sort, split, stat, stty, sum, sync, tac, tail, tee,
99 test, touch, tr, true, tsort, tty, uname, unexpand, uniq, unlink,
100 users, vdir, wc, who, whoami, and yes</seg>
101 </seglistitem>
102 </segmentedlist>
103
104 <variablelist>
105 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
106 <?dbfo list-presentation="list"?>
107 <?dbhtml list-presentation="table"?>
108
109 <varlistentry id="basename">
110 <term><command>basename</command></term>
111 <listitem>
112 <para>Strips any path and a given suffix from a file name</para>
113 <indexterm zone="ch-system-coreutils basename">
114 <primary sortas="b-basename">basename</primary>
115 </indexterm>
116 </listitem>
117 </varlistentry>
118
119 <varlistentry id="cat">
120 <term><command>cat</command></term>
121 <listitem>
122 <para>Concatenates files to standard output</para>
123 <indexterm zone="ch-system-coreutils cat">
124 <primary sortas="b-cat">cat</primary>
125 </indexterm>
126 </listitem>
127 </varlistentry>
128
129 <varlistentry id="chgrp">
130 <term><command>chgrp</command></term>
131 <listitem>
132 <para>Changes the group ownership of files and directories</para>
133 <indexterm zone="ch-system-coreutils chgrp">
134 <primary sortas="b-chgrp">chgrp</primary>
135 </indexterm>
136 </listitem>
137 </varlistentry>
138
139 <varlistentry id="chmod">
140 <term><command>chmod</command></term>
141 <listitem>
142 <para>Changes the permissions of each file to the given mode; the mode
143 can be either a symbolic representation of the changes to make or an
144 octal number representing the new permissions</para>
145 <indexterm zone="ch-system-coreutils chmod">
146 <primary sortas="b-chmod">chmod</primary>
147 </indexterm>
148 </listitem>
149 </varlistentry>
150
151 <varlistentry id="chown">
152 <term><command>chown</command></term>
153 <listitem>
154 <para>Changes the user and/or group ownership of files and
155 directories</para>
156 <indexterm zone="ch-system-coreutils chown">
157 <primary sortas="b-chown">chown</primary>
158 </indexterm>
159 </listitem>
160 </varlistentry>
161
162 <varlistentry id="chroot">
163 <term><command>chroot</command></term>
164 <listitem>
165 <para>Runs a command with the specified directory as the
166 <filename class="directory">/</filename> directory</para>
167 <indexterm zone="ch-system-coreutils chroot">
168 <primary sortas="b-chroot">chroot</primary>
169 </indexterm>
170 </listitem>
171 </varlistentry>
172
173 <varlistentry id="cksum">
174 <term><command>cksum</command></term>
175 <listitem>
176 <para>Prints the Cyclic Redundancy Check (CRC) checksum and the byte
177 counts of each specified file</para>
178 <indexterm zone="ch-system-coreutils cksum">
179 <primary sortas="b-cksum">cksum</primary>
180 </indexterm>
181 </listitem>
182 </varlistentry>
183
184 <varlistentry id="comm">
185 <term><command>comm</command></term>
186 <listitem>
187 <para>Compares two sorted files, outputting in three columns the lines
188 that are unique and the lines that are common</para>
189 <indexterm zone="ch-system-coreutils comm">
190 <primary sortas="b-comm">comm</primary>
191 </indexterm>
192 </listitem>
193 </varlistentry>
194
195 <varlistentry id="cp">
196 <term><command>cp</command></term>
197 <listitem>
198 <para>Copies files</para>
199 <indexterm zone="ch-system-coreutils cp">
200 <primary sortas="b-cp">cp</primary>
201 </indexterm>
202 </listitem>
203 </varlistentry>
204
205 <varlistentry id="csplit">
206 <term><command>csplit</command></term>
207 <listitem>
208 <para>Splits a given file into several new files, separating them
209 according to given patterns or line numbers and outputting the byte
210 count of each new file</para>
211 <indexterm zone="ch-system-coreutils csplit">
212 <primary sortas="b-csplit">csplit</primary>
213 </indexterm>
214 </listitem>
215 </varlistentry>
216
217 <varlistentry id="cut">
218 <term><command>cut</command></term>
219 <listitem>
220 <para>Prints sections of lines, selecting the parts according to given
221 fields or positions</para>
222 <indexterm zone="ch-system-coreutils cut">
223 <primary sortas="b-cut">cut</primary>
224 </indexterm>
225 </listitem>
226 </varlistentry>
227
228 <varlistentry id="date">
229 <term><command>date</command></term>
230 <listitem>
231 <para>Displays the current time in the given format, or sets the
232 system date</para>
233 <indexterm zone="ch-system-coreutils date">
234 <primary sortas="b-date">date</primary>
235 </indexterm>
236 </listitem>
237 </varlistentry>
238
239 <varlistentry id="dd">
240 <term><command>dd</command> </term>
241 <listitem>
242 <para>Copies a file using the given block size and count, while
243 optionally performing conversions on it</para>
244 <indexterm zone="ch-system-coreutils dd">
245 <primary sortas="b-dd">dd</primary>
246 </indexterm>
247 </listitem>
248 </varlistentry>
249
250 <varlistentry id="df">
251 <term><command>df</command></term>
252 <listitem>
253 <para>Reports the amount of disk space available (and used) on all
254 mounted file systems, or only on the file systems holding the selected
255 files</para>
256 <indexterm zone="ch-system-coreutils df">
257 <primary sortas="b-df">df</primary>
258 </indexterm>
259 </listitem>
260 </varlistentry>
261
262 <varlistentry id="dir">
263 <term><command>dir</command></term>
264 <listitem>
265 <para>Lists the contents of each given directory (the same as
266 the <command>ls</command> command)</para>
267 <indexterm zone="ch-system-coreutils dir">
268 <primary sortas="b-dir">dir</primary>
269 </indexterm>
270 </listitem>
271 </varlistentry>
272
273 <varlistentry id="dircolors">
274 <term><command>dircolors</command></term>
275 <listitem>
276 <para>Outputs commands to set the <envar>LS_COLOR</envar>
277 environment variable to change the color scheme used by
278 <command>ls</command></para>
279 <indexterm zone="ch-system-coreutils dircolors">
280 <primary sortas="b-dircolors">dircolors</primary>
281 </indexterm>
282 </listitem>
283 </varlistentry>
284
285 <varlistentry id="dirname">
286 <term><command>dirname</command></term>
287 <listitem>
288 <para>Strips the non-directory suffix from a file name</para>
289 <indexterm zone="ch-system-coreutils dirname">
290 <primary sortas="b-dirname">dirname</primary>
291 </indexterm>
292 </listitem>
293 </varlistentry>
294
295 <varlistentry id="du">
296 <term><command>du</command></term>
297 <listitem>
298 <para>Reports the amount of disk space used by the current directory,
299 by each of the given directories (including all subdirectories) or by
300 each of the given files</para>
301 <indexterm zone="ch-system-coreutils du">
302 <primary sortas="b-du">du</primary>
303 </indexterm>
304 </listitem>
305 </varlistentry>
306
307 <varlistentry id="echo">
308 <term><command>echo</command></term>
309 <listitem>
310 <para>Displays the given strings</para>
311 <indexterm zone="ch-system-coreutils echo">
312 <primary sortas="b-echo">echo</primary>
313 </indexterm>
314 </listitem>
315 </varlistentry>
316
317 <varlistentry id="env">
318 <term><command>env</command></term>
319 <listitem>
320 <para>Runs a command in a modified environment</para>
321 <indexterm zone="ch-system-coreutils env">
322 <primary sortas="b-env">env</primary>
323 </indexterm>
324 </listitem>
325 </varlistentry>
326
327 <varlistentry id="expand">
328 <term><command>expand</command></term>
329 <listitem>
330 <para>Converts tabs to spaces</para>
331 <indexterm zone="ch-system-coreutils expand">
332 <primary sortas="b-expand">expand</primary>
333 </indexterm>
334 </listitem>
335 </varlistentry>
336
337 <varlistentry id="expr">
338 <term><command>expr</command></term>
339 <listitem>
340 <para>Evaluates expressions</para>
341 <indexterm zone="ch-system-coreutils expr">
342 <primary sortas="b-expr">expr</primary>
343 </indexterm>
344 </listitem>
345 </varlistentry>
346
347 <varlistentry id="factor">
348 <term><command>factor</command></term>
349 <listitem>
350 <para>Prints the prime factors of all specified integer numbers</para>
351 <indexterm zone="ch-system-coreutils factor">
352 <primary sortas="b-factor">factor</primary>
353 </indexterm>
354 </listitem>
355 </varlistentry>
356
357 <varlistentry id="false">
358 <term><command>false</command></term>
359 <listitem>
360 <para>Does nothing, unsuccessfully; it always exits with a status code
361 indicating failure</para>
362 <indexterm zone="ch-system-coreutils false">
363 <primary sortas="b-false">false</primary>
364 </indexterm>
365 </listitem>
366 </varlistentry>
367
368 <varlistentry id="fmt">
369 <term><command>fmt</command></term>
370 <listitem>
371 <para>Reformats the paragraphs in the given files</para>
372 <indexterm zone="ch-system-coreutils fmt">
373 <primary sortas="b-fmt">fmt</primary>
374 </indexterm>
375 </listitem>
376 </varlistentry>
377
378 <varlistentry id="fold">
379 <term><command>fold</command></term>
380 <listitem>
381 <para>Wraps the lines in the given files</para>
382 <indexterm zone="ch-system-coreutils fold">
383 <primary sortas="b-fold">fold</primary>
384 </indexterm>
385 </listitem>
386 </varlistentry>
387
388 <varlistentry id="groups">
389 <term><command>groups</command></term>
390 <listitem>
391 <para>Reports a user's group memberships</para>
392 <indexterm zone="ch-system-coreutils groups">
393 <primary sortas="b-groups">groups</primary>
394 </indexterm>
395 </listitem>
396 </varlistentry>
397
398 <varlistentry id="head">
399 <term><command>head</command></term>
400 <listitem>
401 <para>Prints the first ten lines (or the given number of lines)
402 of each given file</para>
403 <indexterm zone="ch-system-coreutils head">
404 <primary sortas="b-head">head</primary>
405 </indexterm>
406 </listitem>
407 </varlistentry>
408
409 <varlistentry id="hostid">
410 <term><command>hostid</command></term>
411 <listitem>
412 <para>Reports the numeric identifier (in hexadecimal) of the host</para>
413 <indexterm zone="ch-system-coreutils hostid">
414 <primary sortas="b-hostid">hostid</primary>
415 </indexterm>
416 </listitem>
417 </varlistentry>
418
419 <varlistentry id="hostname">
420 <term><command>hostname</command></term>
421 <listitem>
422 <para>Reports or sets the name of the host</para>
423 <indexterm zone="ch-system-coreutils hostname">
424 <primary sortas="b-hostname">hostname</primary>
425 </indexterm>
426 </listitem>
427 </varlistentry>
428
429 <varlistentry id="id">
430 <term><command>id</command></term>
431 <listitem>
432 <para>Reports the effective user ID, group ID, and group memberships
433 of the current user or specified user</para>
434 <indexterm zone="ch-system-coreutils id">
435 <primary sortas="b-id">id</primary>
436 </indexterm>
437 </listitem>
438 </varlistentry>
439
440 <varlistentry id="install">
441 <term><command>install</command> </term>
442 <listitem>
443 <para>Copies files while setting their permission modes and, if
444 possible, their owner and group</para>
445 <indexterm zone="ch-system-coreutils install">
446 <primary sortas="b-install">install</primary>
447 </indexterm>
448 </listitem>
449 </varlistentry>
450
451 <varlistentry id="join">
452 <term><command>join</command></term>
453 <listitem>
454 <para>Joins the lines that have identical join fields from two
455 separate files</para>
456 <indexterm zone="ch-system-coreutils join">
457 <primary sortas="b-join">join</primary>
458 </indexterm>
459 </listitem>
460 </varlistentry>
461
462 <varlistentry id="link">
463 <term><command>link</command></term>
464 <listitem>
465 <para>Creates a hard link with the given name to a file</para>
466 <indexterm zone="ch-system-coreutils link">
467 <primary sortas="b-link">link</primary>
468 </indexterm>
469 </listitem>
470 </varlistentry>
471
472 <varlistentry id="ln">
473 <term><command>ln</command></term>
474 <listitem>
475 <para>Makes hard links or soft (symbolic) links between files</para>
476 <indexterm zone="ch-system-coreutils ln">
477 <primary sortas="b-ln">ln</primary>
478 </indexterm>
479 </listitem>
480 </varlistentry>
481
482 <varlistentry id="logname">
483 <term><command>logname</command></term>
484 <listitem>
485 <para>Reports the current user's login name</para>
486 <indexterm zone="ch-system-coreutils logname">
487 <primary sortas="b-logname">logname</primary>
488 </indexterm>
489 </listitem>
490 </varlistentry>
491
492 <varlistentry id="ls">
493 <term><command>ls</command></term>
494 <listitem>
495 <para>Lists the contents of each given directory</para>
496 <indexterm zone="ch-system-coreutils ls">
497 <primary sortas="b-ls">ls</primary>
498 </indexterm>
499 </listitem>
500 </varlistentry>
501
502 <varlistentry id="md5sum">
503 <term><command>md5sum</command></term>
504 <listitem>
505 <para>Reports or checks Message Digest 5 (MD5) checksums</para>
506 <indexterm zone="ch-system-coreutils md5sum">
507 <primary sortas="b-md5sum">md5sum</primary>
508 </indexterm>
509 </listitem>
510 </varlistentry>
511
512 <varlistentry id="mkdir">
513 <term><command>mkdir</command></term>
514 <listitem>
515 <para>Creates directories with the given names</para>
516 <indexterm zone="ch-system-coreutils mkdir">
517 <primary sortas="b-mkdir">mkdir</primary>
518 </indexterm>
519 </listitem>
520 </varlistentry>
521
522 <varlistentry id="mkfifo">
523 <term><command>mkfifo</command></term>
524 <listitem>
525 <para>Creates First-In, First-Outs (FIFOs), a <quote>named
526 pipe</quote> in UNIX parlance, with the given names</para>
527 <indexterm zone="ch-system-coreutils mkfifo">
528 <primary sortas="b-mkfifo">mkfifo</primary>
529 </indexterm>
530 </listitem>
531 </varlistentry>
532
533 <varlistentry id="mknod">
534 <term><command>mknod</command></term>
535 <listitem>
536 <para>Creates device nodes with the given names; a device node is a
537 character special file, a block special file, or a FIFO</para>
538 <indexterm zone="ch-system-coreutils mknod">
539 <primary sortas="b-mknod">mknod</primary>
540 </indexterm>
541 </listitem>
542 </varlistentry>
543
544 <varlistentry id="mv">
545 <term><command>mv</command></term>
546 <listitem>
547 <para>Moves or renames files or directories</para>
548 <indexterm zone="ch-system-coreutils mv">
549 <primary sortas="b-mv">mv</primary>
550 </indexterm>
551 </listitem>
552 </varlistentry>
553
554 <varlistentry id="nice">
555 <term><command>nice</command></term>
556 <listitem>
557 <para>Runs a program with modified scheduling priority</para>
558 <indexterm zone="ch-system-coreutils nice">
559 <primary sortas="b-nice">nice</primary>
560 </indexterm>
561 </listitem>
562 </varlistentry>
563
564 <varlistentry id="nl">
565 <term><command>nl</command></term>
566 <listitem>
567 <para>Numbers the lines from the given files</para>
568 <indexterm zone="ch-system-coreutils nl">
569 <primary sortas="b-nl">nl</primary>
570 </indexterm>
571 </listitem>
572 </varlistentry>
573
574 <varlistentry id="nohup">
575 <term><command>nohup</command></term>
576 <listitem>
577 <para>Runs a command immune to hangups, with its output redirected to
578 a log file</para>
579 <indexterm zone="ch-system-coreutils nohup">
580 <primary sortas="b-nohup">nohup</primary>
581 </indexterm>
582 </listitem>
583 </varlistentry>
584
585 <varlistentry id="od">
586 <term><command>od</command></term>
587 <listitem>
588 <para>Dumps files in octal and other formats</para>
589 <indexterm zone="ch-system-coreutils od">
590 <primary sortas="b-od">od</primary>
591 </indexterm>
592 </listitem>
593 </varlistentry>
594
595 <varlistentry id="paste">
596 <term><command>paste</command></term>
597 <listitem>
598 <para>Merges the given files, joining sequentially corresponding lines
599 side by side, separated by tab characters</para>
600 <indexterm zone="ch-system-coreutils paste">
601 <primary sortas="b-paste">paste</primary>
602 </indexterm>
603 </listitem>
604 </varlistentry>
605
606 <varlistentry id="pathchk">
607 <term><command>pathchk</command></term>
608 <listitem>
609 <para>Checks if file names are valid or portable</para>
610 <indexterm zone="ch-system-coreutils pathchk">
611 <primary sortas="b-pathchk">pathchk</primary>
612 </indexterm>
613 </listitem>
614 </varlistentry>
615
616 <varlistentry id="pinky">
617 <term><command>pinky</command></term>
618 <listitem>
619 <para>Is a lightweight finger client; it reports some information
620 about the given users</para>
621 <indexterm zone="ch-system-coreutils pinky">
622 <primary sortas="b-pinky">pinky</primary>
623 </indexterm>
624 </listitem>
625 </varlistentry>
626
627 <varlistentry id="pr">
628 <term><command>pr</command></term>
629 <listitem>
630 <para>Paginates and columnates files for printing</para>
631 <indexterm zone="ch-system-coreutils pr">
632 <primary sortas="b-pr">pr</primary>
633 </indexterm>
634 </listitem>
635 </varlistentry>
636
637 <varlistentry id="printenv">
638 <term><command>printenv</command></term>
639 <listitem>
640 <para>Prints the environment</para>
641 <indexterm zone="ch-system-coreutils printenv">
642 <primary sortas="b-printenv">printenv</primary>
643 </indexterm>
644 </listitem>
645 </varlistentry>
646
647 <varlistentry id="printf">
648 <term><command>printf</command></term>
649 <listitem>
650 <para>Prints the given arguments according to the given format, much
651 like the C printf function</para>
652 <indexterm zone="ch-system-coreutils printf">
653 <primary sortas="b-printf">printf</primary>
654 </indexterm>
655 </listitem>
656 </varlistentry>
657
658 <varlistentry id="ptx">
659 <term><command>ptx</command></term>
660 <listitem>
661 <para>Produces a permuted index from the contents of the given files,
662 with each keyword in its context</para>
663 <indexterm zone="ch-system-coreutils ptx">
664 <primary sortas="b-ptx">ptx</primary>
665 </indexterm>
666 </listitem>
667 </varlistentry>
668
669 <varlistentry id="pwd">
670 <term><command>pwd</command></term>
671 <listitem>
672 <para>Reports the name of the current working directory</para>
673 <indexterm zone="ch-system-coreutils pwd">
674 <primary sortas="b-pwd">pwd</primary>
675 </indexterm>
676 </listitem>
677 </varlistentry>
678
679 <varlistentry id="readlink">
680 <term><command>readlink</command></term>
681 <listitem>
682 <para>Reports the value of the given symbolic link</para>
683 <indexterm zone="ch-system-coreutils readlink">
684 <primary sortas="b-readlink">readlink</primary>
685 </indexterm>
686 </listitem>
687 </varlistentry>
688
689 <varlistentry id="rm">
690 <term><command>rm</command></term>
691 <listitem>
692 <para>Removes files or directories</para>
693 <indexterm zone="ch-system-coreutils rm">
694 <primary sortas="b-rm">rm</primary>
695 </indexterm>
696 </listitem>
697 </varlistentry>
698
699 <varlistentry id="rmdir">
700 <term><command>rmdir</command></term>
701 <listitem>
702 <para>Removes directories if they are empty</para>
703 <indexterm zone="ch-system-coreutils rmdir">
704 <primary sortas="b-rmdir">rmdir</primary>
705 </indexterm>
706 </listitem>
707 </varlistentry>
708
709 <varlistentry id="seq">
710 <term><command>seq</command></term>
711 <listitem>
712 <para>Prints a sequence of numbers within a given range and with a
713 given increment</para>
714 <indexterm zone="ch-system-coreutils seq">
715 <primary sortas="b-seq">seq</primary>
716 </indexterm>
717 </listitem>
718 </varlistentry>
719
720 <varlistentry id="sha1sum">
721 <term><command>sha1sum</command></term>
722 <listitem>
723 <para>Prints or checks 160-bit Secure Hash Algorithm 1 (SHA1)
724 checksums</para>
725 <indexterm zone="ch-system-coreutils sha1sum">
726 <primary sortas="b-sha1sum">sha1sum</primary>
727 </indexterm>
728 </listitem>
729 </varlistentry>
730
731 <varlistentry id="shred">
732 <term><command>shred</command></term>
733 <listitem>
734 <para>Overwrites the given files repeatedly with complex patterns,
735 making it difficult to recover the data</para>
736 <indexterm zone="ch-system-coreutils shred">
737 <primary sortas="b-shred">shred</primary>
738 </indexterm>
739 </listitem>
740 </varlistentry>
741
742 <varlistentry id="sleep">
743 <term><command>sleep</command></term>
744 <listitem>
745 <para>Pauses for the given amount of time</para>
746 <indexterm zone="ch-system-coreutils sleep">
747 <primary sortas="b-sleep">sleep</primary>
748 </indexterm>
749 </listitem>
750 </varlistentry>
751
752 <varlistentry id="sort">
753 <term><command>sort</command></term>
754 <listitem>
755 <para>Sorts the lines from the given files</para>
756 <indexterm zone="ch-system-coreutils sort">
757 <primary sortas="b-sort">sort</primary>
758 </indexterm>
759 </listitem>
760 </varlistentry>
761
762 <varlistentry id="split">
763 <term><command>split</command></term>
764 <listitem>
765 <para>Splits the given file into pieces, by size or by number of
766 lines</para>
767 <indexterm zone="ch-system-coreutils split">
768 <primary sortas="b-split">split</primary>
769 </indexterm>
770 </listitem>
771 </varlistentry>
772
773 <varlistentry id="stat">
774 <term><command>stat</command></term>
775 <listitem>
776 <para>Displays file or filesystem status</para>
777 <indexterm zone="ch-system-coreutils stat">
778 <primary sortas="b-stat">stat</primary>
779 </indexterm>
780 </listitem>
781 </varlistentry>
782
783 <varlistentry id="stty">
784 <term><command>stty</command></term>
785 <listitem>
786 <para>Sets or reports terminal line settings</para>
787 <indexterm zone="ch-system-coreutils stty">
788 <primary sortas="b-stty">stty</primary>
789 </indexterm>
790 </listitem>
791 </varlistentry>
792
793 <varlistentry id="sum">
794 <term><command>sum</command></term>
795 <listitem>
796 <para>Prints checksum and block counts for each given file</para>
797 <indexterm zone="ch-system-coreutils sum">
798 <primary sortas="b-sum">sum</primary>
799 </indexterm>
800 </listitem>
801 </varlistentry>
802
803 <varlistentry id="sync">
804 <term><command>sync</command></term>
805 <listitem>
806 <para>Flushes file system buffers; it forces changed blocks to disk
807 and updates the super block</para>
808 <indexterm zone="ch-system-coreutils sync">
809 <primary sortas="b-sync">sync</primary>
810 </indexterm>
811 </listitem>
812 </varlistentry>
813
814 <varlistentry id="tac">
815 <term><command>tac</command></term>
816 <listitem>
817 <para>Concatenates the given files in reverse</para>
818 <indexterm zone="ch-system-coreutils tac">
819 <primary sortas="b-tac">tac</primary>
820 </indexterm>
821 </listitem>
822 </varlistentry>
823
824 <varlistentry id="tail">
825 <term><command>tail</command></term>
826 <listitem>
827 <para>Prints the last ten lines (or the given number of lines) of each
828 given file</para>
829 <indexterm zone="ch-system-coreutils tail">
830 <primary sortas="b-tail">tail</primary>
831 </indexterm>
832 </listitem>
833 </varlistentry>
834
835 <varlistentry id="tee">
836 <term><command>tee</command></term>
837 <listitem>
838 <para>Reads from standard input while writing both to standard output
839 and to the given files</para>
840 <indexterm zone="ch-system-coreutils tee">
841 <primary sortas="b-tee">tee</primary>
842 </indexterm>
843 </listitem>
844 </varlistentry>
845
846 <varlistentry id="test">
847 <term><command>test</command> or <command>[</command></term>
848 <listitem>
849 <para>Compares values and checks file types</para>
850 <indexterm zone="ch-system-coreutils test">
851 <primary sortas="b-test">test</primary>
852 </indexterm>
853 </listitem>
854 </varlistentry>
855
856 <varlistentry id="touch">
857 <term><command>touch</command></term>
858 <listitem>
859 <para>Changes file timestamps, setting the access and modification
860 times of the given files to the current time; files that do not exist
861 are created with zero length</para>
862 <indexterm zone="ch-system-coreutils touch">
863 <primary sortas="b-touch">touch</primary>
864 </indexterm>
865 </listitem>
866 </varlistentry>
867
868 <varlistentry id="tr">
869 <term><command>tr</command></term>
870 <listitem>
871 <para>Translates, squeezes, and deletes the given characters from
872 standard input</para>
873 <indexterm zone="ch-system-coreutils tr">
874 <primary sortas="b-tr">tr</primary>
875 </indexterm>
876 </listitem>
877 </varlistentry>
878
879 <varlistentry id="true">
880 <term><command>true</command></term>
881 <listitem>
882 <para>Does nothing, successfully; it always exits with a status code
883 indicating success</para>
884 <indexterm zone="ch-system-coreutils true">
885 <primary sortas="b-true">true</primary>
886 </indexterm>
887 </listitem>
888 </varlistentry>
889
890 <varlistentry id="tsort">
891 <term><command>tsort</command></term>
892 <listitem>
893 <para>Performs a topological sort; it writes a completely ordered list
894 according to the partial ordering in a given file</para>
895 <indexterm zone="ch-system-coreutils tsort">
896 <primary sortas="b-tsort">tsort</primary>
897 </indexterm>
898 </listitem>
899 </varlistentry>
900
901 <varlistentry id="tty">
902 <term><command>tty</command></term>
903 <listitem>
904 <para>Reports the file name of the terminal connected to standard
905 input</para>
906 <indexterm zone="ch-system-coreutils tty">
907 <primary sortas="b-tty">tty</primary>
908 </indexterm>
909 </listitem>
910 </varlistentry>
911
912 <varlistentry id="uname">
913 <term><command>uname</command></term>
914 <listitem>
915 <para>Reports system information</para>
916 <indexterm zone="ch-system-coreutils uname">
917 <primary sortas="b-uname">uname</primary>
918 </indexterm>
919 </listitem>
920 </varlistentry>
921
922 <varlistentry id="unexpand">
923 <term><command>unexpand</command></term>
924 <listitem>
925 <para>Converts spaces to tabs</para>
926 <indexterm zone="ch-system-coreutils unexpand">
927 <primary sortas="b-unexpand">unexpand</primary>
928 </indexterm>
929 </listitem>
930 </varlistentry>
931
932 <varlistentry id="uniq">
933 <term><command>uniq</command></term>
934 <listitem>
935 <para>Discards all but one of successive identical lines</para>
936 <indexterm zone="ch-system-coreutils uniq">
937 <primary sortas="b-uniq">uniq</primary>
938 </indexterm>
939 </listitem>
940 </varlistentry>
941
942 <varlistentry id="unlink">
943 <term><command>unlink</command></term>
944 <listitem>
945 <para>Removes the given file</para>
946 <indexterm zone="ch-system-coreutils unlink">
947 <primary sortas="b-unlink">unlink</primary>
948 </indexterm>
949 </listitem>
950 </varlistentry>
951
952 <varlistentry id="users">
953 <term><command>users</command></term>
954 <listitem>
955 <para>Reports the names of the users currently logged on</para>
956 <indexterm zone="ch-system-coreutils users">
957 <primary sortas="b-users">users</primary>
958 </indexterm>
959 </listitem>
960 </varlistentry>
961
962 <varlistentry id="vdir">
963 <term><command>vdir</command></term>
964 <listitem>
965 <para>Is the same as <command>ls -l</command></para>
966 <indexterm zone="ch-system-coreutils vdir">
967 <primary sortas="b-vdir">vdir</primary>
968 </indexterm>
969 </listitem>
970 </varlistentry>
971
972 <varlistentry id="wc">
973 <term><command>wc</command></term>
974 <listitem>
975 <para>Reports the number of lines, words, and bytes for each given
976 file, as well as a total line when more than one file is given</para>
977 <indexterm zone="ch-system-coreutils wc">
978 <primary sortas="b-wc">wc</primary>
979 </indexterm>
980 </listitem>
981 </varlistentry>
982
983 <varlistentry id="who">
984 <term><command>who</command></term>
985 <listitem>
986 <para>Reports who is logged on</para>
987 <indexterm zone="ch-system-coreutils who">
988 <primary sortas="b-who">who</primary>
989 </indexterm>
990 </listitem>
991 </varlistentry>
992
993 <varlistentry id="whoami">
994 <term><command>whoami</command></term>
995 <listitem>
996 <para>Reports the user name associated with the current effective
997 user ID</para>
998 <indexterm zone="ch-system-coreutils whoami">
999 <primary sortas="b-whoami">whoami</primary>
1000 </indexterm>
1001 </listitem>
1002 </varlistentry>
1003
1004 <varlistentry id="yes">
1005 <term><command>yes</command></term>
1006 <listitem>
1007 <para>Repeatedly outputs <quote>y</quote> or a given string until
1008 killed</para>
1009 <indexterm zone="ch-system-coreutils yes">
1010 <primary sortas="b-yes">yes</primary>
1011 </indexterm>
1012 </listitem>
1013 </varlistentry>
1014
1015 </variablelist>
1016
1017 </sect2>
1018
1019</sect1>
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