source: clfs-sysroot/BOOK/final-system/common/coreutils.xml@ f1b7187

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[02095ae]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
[9748f02]28 <para os="p1">Prevent Coreutils from installing binaries that will be
[02095ae]29 installed by other packages:</para>
30
[9748f02]31<screen os="p2"><userinput>patch -Np1 -i ../&coreutils-suppress-patch;</userinput></screen>
32
[485c2de]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
[3f41ad5]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
[0c2cb0b]42 try and regenerate the man page for uname. Since the compiled uname can
[3f41ad5]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
[3cf26f7]48 <para os="a">Configure can not properly determine how to get free space
49 when cross-compiling, Without putting the following entry into
50 <filename>config.cache</filename> the <command>df</command> program will
51 not be built.</para>
[9748f02]52
[3cf26f7]53<screen os="b"><userinput>echo "fu_cv_sys_stat_statfs2_bsize=yes" &gt; config.cache</userinput></screen>
[02095ae]54
55 <para os="c">Now prepare Coreutils for compilation:</para>
56
[cee2ca2]57<screen os="d"><userinput>./configure --build=${CLFS_HOST} --host=${CLFS_TARGET} \
58 --prefix=/usr --cache-file=config.cache </userinput></screen>
[02095ae]59
60 <para os="e">Compile the package:</para>
61
62<screen os="f"><userinput>make</userinput></screen>
63
64 <para os="g">Install the package:</para>
65
[586feb7]66<screen os="h"><userinput>make DESTDIR=${CLFS} install</userinput></screen>
[02095ae]67
68 <para os="i">Move programs to the locations specified by the FHS:</para>
69
[586feb7]70<screen os="j"><userinput>mv -v ${CLFS}/usr/bin/{cat,chgrp,chmod,chown,cp,date} ${CLFS}/bin
71mv -v ${CLFS}/usr/bin/{dd,df,echo,false,hostname,ln,ls,mkdir,mknod} ${CLFS}/bin
72mv -v ${CLFS}/usr/bin/{mv,pwd,rm,rmdir,stty,true,uname} ${CLFS}/bin
73mv -v ${CLFS}/usr/bin/chroot ${CLFS}/usr/sbin</userinput></screen>
[02095ae]74
[586feb7]75 <para os="k">Other Coreutils programs are used by some of the scripts
[e4f6ff4]76 in the CLFS-Bootscripts package. As <filename
[02095ae]77 class="directory">/usr</filename> may not be available during the early
78 stages of booting, those binaries need to be on the root partition:</para>
79
[586feb7]80<screen os="l"><userinput>mv -v ${CLFS}/usr/bin/{[,basename,head,install,nice} ${CLFS}/bin
81mv -v ${CLFS}/usr/bin/{readlink,sleep,sync,test,touch} ${CLFS}/bin
82ln -svf ../../bin/install ${CLFS}/usr/bin</userinput></screen>
[02095ae]83
84 </sect2>
85
86 <sect2 id="contents-coreutils" role="content">
87 <title>Contents of Coreutils</title>
88
89 <segmentedlist>
90 <segtitle>Installed programs</segtitle>
91
92 <seglistitem>
[b16b4dc]93 <seg>[, basename, cat, chgrp, chmod, chown, chroot, cksum,
[02095ae]94 comm, cp, csplit, cut, date, dd, df, dir, dircolors, dirname, du,
95 echo, env, expand, expr, factor, false, fmt, fold, groups, head,
96 hostid, hostname, id, install, join, link, ln, logname, ls, md5sum,
97 mkdir, mkfifo, mknod, mv, nice, nl, nohup, od, paste, pathchk, pinky,
98 pr, printenv, printf, ptx, pwd, readlink, rm, rmdir, seq, sha1sum,
99 shred, sleep, sort, split, stat, stty, sum, sync, tac, tail, tee,
100 test, touch, tr, true, tsort, tty, uname, unexpand, uniq, unlink,
101 users, vdir, wc, who, whoami, and yes</seg>
102 </seglistitem>
103 </segmentedlist>
104
105 <variablelist>
106 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
107 <?dbfo list-presentation="list"?>
108 <?dbhtml list-presentation="table"?>
109
110 <varlistentry id="basename">
111 <term><command>basename</command></term>
112 <listitem>
113 <para>Strips any path and a given suffix from a file name</para>
114 <indexterm zone="ch-system-coreutils basename">
115 <primary sortas="b-basename">basename</primary>
116 </indexterm>
117 </listitem>
118 </varlistentry>
119
120 <varlistentry id="cat">
121 <term><command>cat</command></term>
122 <listitem>
123 <para>Concatenates files to standard output</para>
124 <indexterm zone="ch-system-coreutils cat">
125 <primary sortas="b-cat">cat</primary>
126 </indexterm>
127 </listitem>
128 </varlistentry>
129
130 <varlistentry id="chgrp">
131 <term><command>chgrp</command></term>
132 <listitem>
133 <para>Changes the group ownership of files and directories</para>
134 <indexterm zone="ch-system-coreutils chgrp">
135 <primary sortas="b-chgrp">chgrp</primary>
136 </indexterm>
137 </listitem>
138 </varlistentry>
139
140 <varlistentry id="chmod">
141 <term><command>chmod</command></term>
142 <listitem>
143 <para>Changes the permissions of each file to the given mode; the mode
144 can be either a symbolic representation of the changes to make or an
145 octal number representing the new permissions</para>
146 <indexterm zone="ch-system-coreutils chmod">
147 <primary sortas="b-chmod">chmod</primary>
148 </indexterm>
149 </listitem>
150 </varlistentry>
151
152 <varlistentry id="chown">
153 <term><command>chown</command></term>
154 <listitem>
155 <para>Changes the user and/or group ownership of files and
156 directories</para>
157 <indexterm zone="ch-system-coreutils chown">
158 <primary sortas="b-chown">chown</primary>
159 </indexterm>
160 </listitem>
161 </varlistentry>
162
163 <varlistentry id="chroot">
164 <term><command>chroot</command></term>
165 <listitem>
166 <para>Runs a command with the specified directory as the
167 <filename class="directory">/</filename> directory</para>
168 <indexterm zone="ch-system-coreutils chroot">
169 <primary sortas="b-chroot">chroot</primary>
170 </indexterm>
171 </listitem>
172 </varlistentry>
173
174 <varlistentry id="cksum">
175 <term><command>cksum</command></term>
176 <listitem>
177 <para>Prints the Cyclic Redundancy Check (CRC) checksum and the byte
178 counts of each specified file</para>
179 <indexterm zone="ch-system-coreutils cksum">
180 <primary sortas="b-cksum">cksum</primary>
181 </indexterm>
182 </listitem>
183 </varlistentry>
184
185 <varlistentry id="comm">
186 <term><command>comm</command></term>
187 <listitem>
188 <para>Compares two sorted files, outputting in three columns the lines
189 that are unique and the lines that are common</para>
190 <indexterm zone="ch-system-coreutils comm">
191 <primary sortas="b-comm">comm</primary>
192 </indexterm>
193 </listitem>
194 </varlistentry>
195
196 <varlistentry id="cp">
197 <term><command>cp</command></term>
198 <listitem>
199 <para>Copies files</para>
200 <indexterm zone="ch-system-coreutils cp">
201 <primary sortas="b-cp">cp</primary>
202 </indexterm>
203 </listitem>
204 </varlistentry>
205
206 <varlistentry id="csplit">
207 <term><command>csplit</command></term>
208 <listitem>
209 <para>Splits a given file into several new files, separating them
210 according to given patterns or line numbers and outputting the byte
211 count of each new file</para>
212 <indexterm zone="ch-system-coreutils csplit">
213 <primary sortas="b-csplit">csplit</primary>
214 </indexterm>
215 </listitem>
216 </varlistentry>
217
218 <varlistentry id="cut">
219 <term><command>cut</command></term>
220 <listitem>
221 <para>Prints sections of lines, selecting the parts according to given
222 fields or positions</para>
223 <indexterm zone="ch-system-coreutils cut">
224 <primary sortas="b-cut">cut</primary>
225 </indexterm>
226 </listitem>
227 </varlistentry>
228
229 <varlistentry id="date">
230 <term><command>date</command></term>
231 <listitem>
232 <para>Displays the current time in the given format, or sets the
233 system date</para>
234 <indexterm zone="ch-system-coreutils date">
235 <primary sortas="b-date">date</primary>
236 </indexterm>
237 </listitem>
238 </varlistentry>
239
240 <varlistentry id="dd">
241 <term><command>dd</command> </term>
242 <listitem>
243 <para>Copies a file using the given block size and count, while
244 optionally performing conversions on it</para>
245 <indexterm zone="ch-system-coreutils dd">
246 <primary sortas="b-dd">dd</primary>
247 </indexterm>
248 </listitem>
249 </varlistentry>
250
251 <varlistentry id="df">
252 <term><command>df</command></term>
253 <listitem>
254 <para>Reports the amount of disk space available (and used) on all
255 mounted file systems, or only on the file systems holding the selected
256 files</para>
257 <indexterm zone="ch-system-coreutils df">
258 <primary sortas="b-df">df</primary>
259 </indexterm>
260 </listitem>
261 </varlistentry>
262
263 <varlistentry id="dir">
264 <term><command>dir</command></term>
265 <listitem>
266 <para>Lists the contents of each given directory (the same as
267 the <command>ls</command> command)</para>
268 <indexterm zone="ch-system-coreutils dir">
269 <primary sortas="b-dir">dir</primary>
270 </indexterm>
271 </listitem>
272 </varlistentry>
273
274 <varlistentry id="dircolors">
275 <term><command>dircolors</command></term>
276 <listitem>
277 <para>Outputs commands to set the <envar>LS_COLOR</envar>
278 environment variable to change the color scheme used by
279 <command>ls</command></para>
280 <indexterm zone="ch-system-coreutils dircolors">
281 <primary sortas="b-dircolors">dircolors</primary>
282 </indexterm>
283 </listitem>
284 </varlistentry>
285
286 <varlistentry id="dirname">
287 <term><command>dirname</command></term>
288 <listitem>
289 <para>Strips the non-directory suffix from a file name</para>
290 <indexterm zone="ch-system-coreutils dirname">
291 <primary sortas="b-dirname">dirname</primary>
292 </indexterm>
293 </listitem>
294 </varlistentry>
295
296 <varlistentry id="du">
297 <term><command>du</command></term>
298 <listitem>
299 <para>Reports the amount of disk space used by the current directory,
300 by each of the given directories (including all subdirectories) or by
301 each of the given files</para>
302 <indexterm zone="ch-system-coreutils du">
303 <primary sortas="b-du">du</primary>
304 </indexterm>
305 </listitem>
306 </varlistentry>
307
308 <varlistentry id="echo">
309 <term><command>echo</command></term>
310 <listitem>
311 <para>Displays the given strings</para>
312 <indexterm zone="ch-system-coreutils echo">
313 <primary sortas="b-echo">echo</primary>
314 </indexterm>
315 </listitem>
316 </varlistentry>
317
318 <varlistentry id="env">
319 <term><command>env</command></term>
320 <listitem>
321 <para>Runs a command in a modified environment</para>
322 <indexterm zone="ch-system-coreutils env">
323 <primary sortas="b-env">env</primary>
324 </indexterm>
325 </listitem>
326 </varlistentry>
327
328 <varlistentry id="expand">
329 <term><command>expand</command></term>
330 <listitem>
331 <para>Converts tabs to spaces</para>
332 <indexterm zone="ch-system-coreutils expand">
333 <primary sortas="b-expand">expand</primary>
334 </indexterm>
335 </listitem>
336 </varlistentry>
337
338 <varlistentry id="expr">
339 <term><command>expr</command></term>
340 <listitem>
341 <para>Evaluates expressions</para>
342 <indexterm zone="ch-system-coreutils expr">
343 <primary sortas="b-expr">expr</primary>
344 </indexterm>
345 </listitem>
346 </varlistentry>
347
348 <varlistentry id="factor">
349 <term><command>factor</command></term>
350 <listitem>
351 <para>Prints the prime factors of all specified integer numbers</para>
352 <indexterm zone="ch-system-coreutils factor">
353 <primary sortas="b-factor">factor</primary>
354 </indexterm>
355 </listitem>
356 </varlistentry>
357
358 <varlistentry id="false">
359 <term><command>false</command></term>
360 <listitem>
361 <para>Does nothing, unsuccessfully; it always exits with a status code
362 indicating failure</para>
363 <indexterm zone="ch-system-coreutils false">
364 <primary sortas="b-false">false</primary>
365 </indexterm>
366 </listitem>
367 </varlistentry>
368
369 <varlistentry id="fmt">
370 <term><command>fmt</command></term>
371 <listitem>
372 <para>Reformats the paragraphs in the given files</para>
373 <indexterm zone="ch-system-coreutils fmt">
374 <primary sortas="b-fmt">fmt</primary>
375 </indexterm>
376 </listitem>
377 </varlistentry>
378
379 <varlistentry id="fold">
380 <term><command>fold</command></term>
381 <listitem>
382 <para>Wraps the lines in the given files</para>
383 <indexterm zone="ch-system-coreutils fold">
384 <primary sortas="b-fold">fold</primary>
385 </indexterm>
386 </listitem>
387 </varlistentry>
388
389 <varlistentry id="groups">
390 <term><command>groups</command></term>
391 <listitem>
392 <para>Reports a user's group memberships</para>
393 <indexterm zone="ch-system-coreutils groups">
394 <primary sortas="b-groups">groups</primary>
395 </indexterm>
396 </listitem>
397 </varlistentry>
398
399 <varlistentry id="head">
400 <term><command>head</command></term>
401 <listitem>
402 <para>Prints the first ten lines (or the given number of lines)
403 of each given file</para>
404 <indexterm zone="ch-system-coreutils head">
405 <primary sortas="b-head">head</primary>
406 </indexterm>
407 </listitem>
408 </varlistentry>
409
410 <varlistentry id="hostid">
411 <term><command>hostid</command></term>
412 <listitem>
413 <para>Reports the numeric identifier (in hexadecimal) of the host</para>
414 <indexterm zone="ch-system-coreutils hostid">
415 <primary sortas="b-hostid">hostid</primary>
416 </indexterm>
417 </listitem>
418 </varlistentry>
419
420 <varlistentry id="hostname">
421 <term><command>hostname</command></term>
422 <listitem>
423 <para>Reports or sets the name of the host</para>
424 <indexterm zone="ch-system-coreutils hostname">
425 <primary sortas="b-hostname">hostname</primary>
426 </indexterm>
427 </listitem>
428 </varlistentry>
429
430 <varlistentry id="id">
431 <term><command>id</command></term>
432 <listitem>
433 <para>Reports the effective user ID, group ID, and group memberships
434 of the current user or specified user</para>
435 <indexterm zone="ch-system-coreutils id">
436 <primary sortas="b-id">id</primary>
437 </indexterm>
438 </listitem>
439 </varlistentry>
440
441 <varlistentry id="install">
442 <term><command>install</command> </term>
443 <listitem>
444 <para>Copies files while setting their permission modes and, if
445 possible, their owner and group</para>
446 <indexterm zone="ch-system-coreutils install">
447 <primary sortas="b-install">install</primary>
448 </indexterm>
449 </listitem>
450 </varlistentry>
451
452 <varlistentry id="join">
453 <term><command>join</command></term>
454 <listitem>
455 <para>Joins the lines that have identical join fields from two
456 separate files</para>
457 <indexterm zone="ch-system-coreutils join">
458 <primary sortas="b-join">join</primary>
459 </indexterm>
460 </listitem>
461 </varlistentry>
462
463 <varlistentry id="link">
464 <term><command>link</command></term>
465 <listitem>
466 <para>Creates a hard link with the given name to a file</para>
467 <indexterm zone="ch-system-coreutils link">
468 <primary sortas="b-link">link</primary>
469 </indexterm>
470 </listitem>
471 </varlistentry>
472
473 <varlistentry id="ln">
474 <term><command>ln</command></term>
475 <listitem>
476 <para>Makes hard links or soft (symbolic) links between files</para>
477 <indexterm zone="ch-system-coreutils ln">
478 <primary sortas="b-ln">ln</primary>
479 </indexterm>
480 </listitem>
481 </varlistentry>
482
483 <varlistentry id="logname">
484 <term><command>logname</command></term>
485 <listitem>
486 <para>Reports the current user's login name</para>
487 <indexterm zone="ch-system-coreutils logname">
488 <primary sortas="b-logname">logname</primary>
489 </indexterm>
490 </listitem>
491 </varlistentry>
492
493 <varlistentry id="ls">
494 <term><command>ls</command></term>
495 <listitem>
496 <para>Lists the contents of each given directory</para>
497 <indexterm zone="ch-system-coreutils ls">
498 <primary sortas="b-ls">ls</primary>
499 </indexterm>
500 </listitem>
501 </varlistentry>
502
503 <varlistentry id="md5sum">
504 <term><command>md5sum</command></term>
505 <listitem>
506 <para>Reports or checks Message Digest 5 (MD5) checksums</para>
507 <indexterm zone="ch-system-coreutils md5sum">
508 <primary sortas="b-md5sum">md5sum</primary>
509 </indexterm>
510 </listitem>
511 </varlistentry>
512
513 <varlistentry id="mkdir">
514 <term><command>mkdir</command></term>
515 <listitem>
516 <para>Creates directories with the given names</para>
517 <indexterm zone="ch-system-coreutils mkdir">
518 <primary sortas="b-mkdir">mkdir</primary>
519 </indexterm>
520 </listitem>
521 </varlistentry>
522
523 <varlistentry id="mkfifo">
524 <term><command>mkfifo</command></term>
525 <listitem>
526 <para>Creates First-In, First-Outs (FIFOs), a <quote>named
527 pipe</quote> in UNIX parlance, with the given names</para>
528 <indexterm zone="ch-system-coreutils mkfifo">
529 <primary sortas="b-mkfifo">mkfifo</primary>
530 </indexterm>
531 </listitem>
532 </varlistentry>
533
534 <varlistentry id="mknod">
535 <term><command>mknod</command></term>
536 <listitem>
537 <para>Creates device nodes with the given names; a device node is a
538 character special file, a block special file, or a FIFO</para>
539 <indexterm zone="ch-system-coreutils mknod">
540 <primary sortas="b-mknod">mknod</primary>
541 </indexterm>
542 </listitem>
543 </varlistentry>
544
545 <varlistentry id="mv">
546 <term><command>mv</command></term>
547 <listitem>
548 <para>Moves or renames files or directories</para>
549 <indexterm zone="ch-system-coreutils mv">
550 <primary sortas="b-mv">mv</primary>
551 </indexterm>
552 </listitem>
553 </varlistentry>
554
555 <varlistentry id="nice">
556 <term><command>nice</command></term>
557 <listitem>
558 <para>Runs a program with modified scheduling priority</para>
559 <indexterm zone="ch-system-coreutils nice">
560 <primary sortas="b-nice">nice</primary>
561 </indexterm>
562 </listitem>
563 </varlistentry>
564
565 <varlistentry id="nl">
566 <term><command>nl</command></term>
567 <listitem>
568 <para>Numbers the lines from the given files</para>
569 <indexterm zone="ch-system-coreutils nl">
570 <primary sortas="b-nl">nl</primary>
571 </indexterm>
572 </listitem>
573 </varlistentry>
574
575 <varlistentry id="nohup">
576 <term><command>nohup</command></term>
577 <listitem>
578 <para>Runs a command immune to hangups, with its output redirected to
579 a log file</para>
580 <indexterm zone="ch-system-coreutils nohup">
581 <primary sortas="b-nohup">nohup</primary>
582 </indexterm>
583 </listitem>
584 </varlistentry>
585
586 <varlistentry id="od">
587 <term><command>od</command></term>
588 <listitem>
589 <para>Dumps files in octal and other formats</para>
590 <indexterm zone="ch-system-coreutils od">
591 <primary sortas="b-od">od</primary>
592 </indexterm>
593 </listitem>
594 </varlistentry>
595
596 <varlistentry id="paste">
597 <term><command>paste</command></term>
598 <listitem>
599 <para>Merges the given files, joining sequentially corresponding lines
600 side by side, separated by tab characters</para>
601 <indexterm zone="ch-system-coreutils paste">
602 <primary sortas="b-paste">paste</primary>
603 </indexterm>
604 </listitem>
605 </varlistentry>
606
607 <varlistentry id="pathchk">
608 <term><command>pathchk</command></term>
609 <listitem>
610 <para>Checks if file names are valid or portable</para>
611 <indexterm zone="ch-system-coreutils pathchk">
612 <primary sortas="b-pathchk">pathchk</primary>
613 </indexterm>
614 </listitem>
615 </varlistentry>
616
617 <varlistentry id="pinky">
618 <term><command>pinky</command></term>
619 <listitem>
620 <para>Is a lightweight finger client; it reports some information
621 about the given users</para>
622 <indexterm zone="ch-system-coreutils pinky">
623 <primary sortas="b-pinky">pinky</primary>
624 </indexterm>
625 </listitem>
626 </varlistentry>
627
628 <varlistentry id="pr">
629 <term><command>pr</command></term>
630 <listitem>
631 <para>Paginates and columnates files for printing</para>
632 <indexterm zone="ch-system-coreutils pr">
633 <primary sortas="b-pr">pr</primary>
634 </indexterm>
635 </listitem>
636 </varlistentry>
637
638 <varlistentry id="printenv">
639 <term><command>printenv</command></term>
640 <listitem>
641 <para>Prints the environment</para>
642 <indexterm zone="ch-system-coreutils printenv">
643 <primary sortas="b-printenv">printenv</primary>
644 </indexterm>
645 </listitem>
646 </varlistentry>
647
648 <varlistentry id="printf">
649 <term><command>printf</command></term>
650 <listitem>
651 <para>Prints the given arguments according to the given format, much
652 like the C printf function</para>
653 <indexterm zone="ch-system-coreutils printf">
654 <primary sortas="b-printf">printf</primary>
655 </indexterm>
656 </listitem>
657 </varlistentry>
658
659 <varlistentry id="ptx">
660 <term><command>ptx</command></term>
661 <listitem>
662 <para>Produces a permuted index from the contents of the given files,
663 with each keyword in its context</para>
664 <indexterm zone="ch-system-coreutils ptx">
665 <primary sortas="b-ptx">ptx</primary>
666 </indexterm>
667 </listitem>
668 </varlistentry>
669
670 <varlistentry id="pwd">
671 <term><command>pwd</command></term>
672 <listitem>
673 <para>Reports the name of the current working directory</para>
674 <indexterm zone="ch-system-coreutils pwd">
675 <primary sortas="b-pwd">pwd</primary>
676 </indexterm>
677 </listitem>
678 </varlistentry>
679
680 <varlistentry id="readlink">
681 <term><command>readlink</command></term>
682 <listitem>
683 <para>Reports the value of the given symbolic link</para>
684 <indexterm zone="ch-system-coreutils readlink">
685 <primary sortas="b-readlink">readlink</primary>
686 </indexterm>
687 </listitem>
688 </varlistentry>
689
690 <varlistentry id="rm">
691 <term><command>rm</command></term>
692 <listitem>
693 <para>Removes files or directories</para>
694 <indexterm zone="ch-system-coreutils rm">
695 <primary sortas="b-rm">rm</primary>
696 </indexterm>
697 </listitem>
698 </varlistentry>
699
700 <varlistentry id="rmdir">
701 <term><command>rmdir</command></term>
702 <listitem>
703 <para>Removes directories if they are empty</para>
704 <indexterm zone="ch-system-coreutils rmdir">
705 <primary sortas="b-rmdir">rmdir</primary>
706 </indexterm>
707 </listitem>
708 </varlistentry>
709
710 <varlistentry id="seq">
711 <term><command>seq</command></term>
712 <listitem>
713 <para>Prints a sequence of numbers within a given range and with a
714 given increment</para>
715 <indexterm zone="ch-system-coreutils seq">
716 <primary sortas="b-seq">seq</primary>
717 </indexterm>
718 </listitem>
719 </varlistentry>
720
721 <varlistentry id="sha1sum">
722 <term><command>sha1sum</command></term>
723 <listitem>
724 <para>Prints or checks 160-bit Secure Hash Algorithm 1 (SHA1)
725 checksums</para>
726 <indexterm zone="ch-system-coreutils sha1sum">
727 <primary sortas="b-sha1sum">sha1sum</primary>
728 </indexterm>
729 </listitem>
730 </varlistentry>
731
732 <varlistentry id="shred">
733 <term><command>shred</command></term>
734 <listitem>
735 <para>Overwrites the given files repeatedly with complex patterns,
736 making it difficult to recover the data</para>
737 <indexterm zone="ch-system-coreutils shred">
738 <primary sortas="b-shred">shred</primary>
739 </indexterm>
740 </listitem>
741 </varlistentry>
742
743 <varlistentry id="sleep">
744 <term><command>sleep</command></term>
745 <listitem>
746 <para>Pauses for the given amount of time</para>
747 <indexterm zone="ch-system-coreutils sleep">
748 <primary sortas="b-sleep">sleep</primary>
749 </indexterm>
750 </listitem>
751 </varlistentry>
752
753 <varlistentry id="sort">
754 <term><command>sort</command></term>
755 <listitem>
756 <para>Sorts the lines from the given files</para>
757 <indexterm zone="ch-system-coreutils sort">
758 <primary sortas="b-sort">sort</primary>
759 </indexterm>
760 </listitem>
761 </varlistentry>
762
763 <varlistentry id="split">
764 <term><command>split</command></term>
765 <listitem>
766 <para>Splits the given file into pieces, by size or by number of
767 lines</para>
768 <indexterm zone="ch-system-coreutils split">
769 <primary sortas="b-split">split</primary>
770 </indexterm>
771 </listitem>
772 </varlistentry>
773
774 <varlistentry id="stat">
775 <term><command>stat</command></term>
776 <listitem>
777 <para>Displays file or filesystem status</para>
778 <indexterm zone="ch-system-coreutils stat">
779 <primary sortas="b-stat">stat</primary>
780 </indexterm>
781 </listitem>
782 </varlistentry>
783
784 <varlistentry id="stty">
785 <term><command>stty</command></term>
786 <listitem>
787 <para>Sets or reports terminal line settings</para>
788 <indexterm zone="ch-system-coreutils stty">
789 <primary sortas="b-stty">stty</primary>
790 </indexterm>
791 </listitem>
792 </varlistentry>
793
794 <varlistentry id="sum">
795 <term><command>sum</command></term>
796 <listitem>
797 <para>Prints checksum and block counts for each given file</para>
798 <indexterm zone="ch-system-coreutils sum">
799 <primary sortas="b-sum">sum</primary>
800 </indexterm>
801 </listitem>
802 </varlistentry>
803
804 <varlistentry id="sync">
805 <term><command>sync</command></term>
806 <listitem>
807 <para>Flushes file system buffers; it forces changed blocks to disk
808 and updates the super block</para>
809 <indexterm zone="ch-system-coreutils sync">
810 <primary sortas="b-sync">sync</primary>
811 </indexterm>
812 </listitem>
813 </varlistentry>
814
815 <varlistentry id="tac">
816 <term><command>tac</command></term>
817 <listitem>
818 <para>Concatenates the given files in reverse</para>
819 <indexterm zone="ch-system-coreutils tac">
820 <primary sortas="b-tac">tac</primary>
821 </indexterm>
822 </listitem>
823 </varlistentry>
824
825 <varlistentry id="tail">
826 <term><command>tail</command></term>
827 <listitem>
828 <para>Prints the last ten lines (or the given number of lines) of each
829 given file</para>
830 <indexterm zone="ch-system-coreutils tail">
831 <primary sortas="b-tail">tail</primary>
832 </indexterm>
833 </listitem>
834 </varlistentry>
835
836 <varlistentry id="tee">
837 <term><command>tee</command></term>
838 <listitem>
839 <para>Reads from standard input while writing both to standard output
840 and to the given files</para>
841 <indexterm zone="ch-system-coreutils tee">
842 <primary sortas="b-tee">tee</primary>
843 </indexterm>
844 </listitem>
845 </varlistentry>
846
847 <varlistentry id="test">
[b16b4dc]848 <term><command>test</command> or <command>[</command></term>
[02095ae]849 <listitem>
850 <para>Compares values and checks file types</para>
851 <indexterm zone="ch-system-coreutils test">
852 <primary sortas="b-test">test</primary>
853 </indexterm>
854 </listitem>
855 </varlistentry>
856
857 <varlistentry id="touch">
858 <term><command>touch</command></term>
859 <listitem>
860 <para>Changes file timestamps, setting the access and modification
861 times of the given files to the current time; files that do not exist
862 are created with zero length</para>
863 <indexterm zone="ch-system-coreutils touch">
864 <primary sortas="b-touch">touch</primary>
865 </indexterm>
866 </listitem>
867 </varlistentry>
868
869 <varlistentry id="tr">
870 <term><command>tr</command></term>
871 <listitem>
872 <para>Translates, squeezes, and deletes the given characters from
873 standard input</para>
874 <indexterm zone="ch-system-coreutils tr">
875 <primary sortas="b-tr">tr</primary>
876 </indexterm>
877 </listitem>
878 </varlistentry>
879
880 <varlistentry id="true">
881 <term><command>true</command></term>
882 <listitem>
883 <para>Does nothing, successfully; it always exits with a status code
884 indicating success</para>
885 <indexterm zone="ch-system-coreutils true">
886 <primary sortas="b-true">true</primary>
887 </indexterm>
888 </listitem>
889 </varlistentry>
890
891 <varlistentry id="tsort">
892 <term><command>tsort</command></term>
893 <listitem>
894 <para>Performs a topological sort; it writes a completely ordered list
895 according to the partial ordering in a given file</para>
896 <indexterm zone="ch-system-coreutils tsort">
897 <primary sortas="b-tsort">tsort</primary>
898 </indexterm>
899 </listitem>
900 </varlistentry>
901
902 <varlistentry id="tty">
903 <term><command>tty</command></term>
904 <listitem>
905 <para>Reports the file name of the terminal connected to standard
906 input</para>
907 <indexterm zone="ch-system-coreutils tty">
908 <primary sortas="b-tty">tty</primary>
909 </indexterm>
910 </listitem>
911 </varlistentry>
912
913 <varlistentry id="uname">
914 <term><command>uname</command></term>
915 <listitem>
916 <para>Reports system information</para>
917 <indexterm zone="ch-system-coreutils uname">
918 <primary sortas="b-uname">uname</primary>
919 </indexterm>
920 </listitem>
921 </varlistentry>
922
923 <varlistentry id="unexpand">
924 <term><command>unexpand</command></term>
925 <listitem>
926 <para>Converts spaces to tabs</para>
927 <indexterm zone="ch-system-coreutils unexpand">
928 <primary sortas="b-unexpand">unexpand</primary>
929 </indexterm>
930 </listitem>
931 </varlistentry>
932
933 <varlistentry id="uniq">
934 <term><command>uniq</command></term>
935 <listitem>
936 <para>Discards all but one of successive identical lines</para>
937 <indexterm zone="ch-system-coreutils uniq">
938 <primary sortas="b-uniq">uniq</primary>
939 </indexterm>
940 </listitem>
941 </varlistentry>
942
943 <varlistentry id="unlink">
944 <term><command>unlink</command></term>
945 <listitem>
946 <para>Removes the given file</para>
947 <indexterm zone="ch-system-coreutils unlink">
948 <primary sortas="b-unlink">unlink</primary>
949 </indexterm>
950 </listitem>
951 </varlistentry>
952
953 <varlistentry id="users">
954 <term><command>users</command></term>
955 <listitem>
956 <para>Reports the names of the users currently logged on</para>
957 <indexterm zone="ch-system-coreutils users">
958 <primary sortas="b-users">users</primary>
959 </indexterm>
960 </listitem>
961 </varlistentry>
962
963 <varlistentry id="vdir">
964 <term><command>vdir</command></term>
965 <listitem>
966 <para>Is the same as <command>ls -l</command></para>
967 <indexterm zone="ch-system-coreutils vdir">
968 <primary sortas="b-vdir">vdir</primary>
969 </indexterm>
970 </listitem>
971 </varlistentry>
972
973 <varlistentry id="wc">
974 <term><command>wc</command></term>
975 <listitem>
976 <para>Reports the number of lines, words, and bytes for each given
977 file, as well as a total line when more than one file is given</para>
978 <indexterm zone="ch-system-coreutils wc">
979 <primary sortas="b-wc">wc</primary>
980 </indexterm>
981 </listitem>
982 </varlistentry>
983
984 <varlistentry id="who">
985 <term><command>who</command></term>
986 <listitem>
987 <para>Reports who is logged on</para>
988 <indexterm zone="ch-system-coreutils who">
989 <primary sortas="b-who">who</primary>
990 </indexterm>
991 </listitem>
992 </varlistentry>
993
994 <varlistentry id="whoami">
995 <term><command>whoami</command></term>
996 <listitem>
997 <para>Reports the user name associated with the current effective
998 user ID</para>
999 <indexterm zone="ch-system-coreutils whoami">
1000 <primary sortas="b-whoami">whoami</primary>
1001 </indexterm>
1002 </listitem>
1003 </varlistentry>
1004
1005 <varlistentry id="yes">
1006 <term><command>yes</command></term>
1007 <listitem>
1008 <para>Repeatedly outputs <quote>y</quote> or a given string until
1009 killed</para>
1010 <indexterm zone="ch-system-coreutils yes">
1011 <primary sortas="b-yes">yes</primary>
1012 </indexterm>
1013 </listitem>
1014 </varlistentry>
1015
1016 </variablelist>
1017
1018 </sect2>
1019
1020</sect1>
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