source: BOOK/final-system/common/util-linux-ng.xml@ 8053eec

clfs-1.2 clfs-2.1 clfs-3.0.0-systemd clfs-3.0.0-sysvinit systemd sysvinit
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1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4 <!ENTITY % general-entities SYSTEM "../../general.ent">
5 %general-entities;
6]>
7
8<sect1 id="ch-system-util-linux-ng" role="wrap">
9 <?dbhtml filename="util-linux-ng.html"?>
10
11 <title>Util-linux-ng-&util-linux-ng-version;</title>
12
13 <indexterm zone="ch-system-util-linux-ng">
14 <primary sortas="a-Util-linux-ng">Util-linux-ng</primary>
15 </indexterm>
16
17 <sect2 role="package">
18 <title/>
19
20 <para>The Util-linux-ng package contains miscellaneous utility programs.
21 Among them are utilities for handling file systems, consoles, partitions,
22 and messages.</para>
23
24
25 </sect2>
26
27 <sect2 id="fhs-util-linux-ng" role="installation">
28 <title>FHS compliance notes</title>
29
30 <para>The FHS recommends using the <filename
31 class="directory">/var/lib/hwclock</filename> directory instead of the
32 usual <filename class="directory">/etc</filename> directory as the
33 location for the <filename>adjtime</filename> file. To make the
34 <command>hwclock</command> program FHS-compliant, run the following:</para>
35
36<screen><userinput>sed -i 's@etc/adjtime@var/lib/hwclock/adjtime@g' \
37 hwclock/hwclock.c
38mkdir -pv /var/lib/hwclock</userinput></screen>
39
40 </sect2>
41
42 <sect2 role="installation">
43 <title>Installation of Util-linux-ng</title>
44
45 <para os="a">Prepare Util-linux-ng for compilation:</para>
46
47<screen os="b"><userinput>./configure --enable-partx --disable-wall --enable-write</userinput></screen>
48
49 <variablelist os="c">
50 <title>The meaning of the configure options:</title>
51
52 <varlistentry>
53 <term><parameter>--enable-partx</parameter></term>
54 <listitem>
55 <para>Enable partx stuff (need more description).</para>
56 </listitem>
57 </varlistentry>
58
59 <varlistentry>
60 <term><parameter>--disable-wall</parameter></term>
61 <listitem>
62 <para>Disables building the <command>wall</command> program,
63 as the Sysvinit package installs its own version.</para>
64 </listitem>
65 </varlistentry>
66
67 <varlistentry>
68 <term><parameter>--enable-write</parameter></term>
69 <listitem>
70 <para>This option allows the <command>write</command> program to be
71 installed.</para>
72 </listitem>
73 </varlistentry>
74
75 </variablelist>
76
77 <para os="d">Compile the package:</para>
78
79<screen os="e"><userinput>make</userinput></screen>
80
81 <para os="f">This package does not come with a test suite.</para>
82
83 <para os="g">Install the package:</para>
84
85<screen os="h"><userinput>make install</userinput></screen>
86
87 <para os="i">Move the <command>logger</command> binary to
88 <filename class="directory">/bin</filename> as it is needed by the
89 CLFS-Bootscripts package:</para>
90
91<screen os="j"><userinput>mv -v /usr/bin/logger /bin</userinput></screen>
92
93 </sect2>
94
95 <sect2 id="contents-util-linux-ng" role="content">
96 <title>Contents of Util-linux-ng</title>
97
98 <segmentedlist>
99 <segtitle>Installed programs</segtitle>
100
101 <seglistitem>
102 <seg>addpart, agetty, blockdev, cal, cfdisk, chkdupexe, col, colcrt,
103 colrm, column, ctrlaltdel, cytune, ddate, delpart, dmesg, fdformat,
104 fdisk, flock, fsck.cramfs, fsck.minix, getopt, hexdump, hwclock, ionice,
105 ipcrm, ipcs, isosize, line, logger, look, losetup, mcookie, mkfs,
106 mkfs.bfs, mkfs.cramfs, mkfs.minix, mkswap, more, mount, namei, partx,
107 pg, pivot_root, readprofile, rename, renice, rev, rtcwake, script,
108 scriptreplay, setarch, setsid, setterm, sfdisk, swapoff (link to swapon),
109 swapon, tailf, taskset, tunelp, ul, umount, whereis, and write</seg>
110 </seglistitem>
111 </segmentedlist>
112
113 <variablelist>
114 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
115 <?dbfo list-presentation="list"?>
116 <?dbhtml list-presentation="table"?>
117
118 <varlistentry id="addpart">
119 <term><command>addpart</command></term>
120 <listitem>
121 <para>Informs the kernel of a new partition</para>
122 <indexterm zone="ch-system-util-linux-ng addpart">
123 <primary sortas="b-addpart">addpart</primary>
124 </indexterm>
125 </listitem>
126 </varlistentry>
127
128 <varlistentry id="agetty">
129 <term><command>agetty</command></term>
130 <listitem>
131 <para>Opens a tty port, prompts for a login name,
132 and then invokes the <command>login</command> program</para>
133 <indexterm zone="ch-system-util-linux-ng agetty">
134 <primary sortas="b-agetty">agetty</primary>
135 </indexterm>
136 </listitem>
137 </varlistentry>
138
139 <varlistentry id="blockdev">
140 <term><command>blockdev</command></term>
141 <listitem>
142 <para>Allows users to call block device ioctls from the command
143 line</para>
144 <indexterm zone="ch-system-util-linux-ng blockdev">
145 <primary sortas="b-blockdev">blockdev</primary>
146 </indexterm>
147 </listitem>
148 </varlistentry>
149
150 <varlistentry id="cal">
151 <term><command>cal</command></term>
152 <listitem>
153 <para>Displays a simple calendar</para>
154 <indexterm zone="ch-system-util-linux-ng cal">
155 <primary sortas="b-cal">cal</primary>
156 </indexterm>
157 </listitem>
158 </varlistentry>
159
160 <varlistentry id="cfdisk">
161 <term><command>cfdisk</command></term>
162 <listitem>
163 <para>Manipulates the partition table of the given device</para>
164 <indexterm zone="ch-system-util-linux-ng cfdisk">
165 <primary sortas="b-cfdisk">cfdisk</primary>
166 </indexterm>
167 </listitem>
168 </varlistentry>
169
170 <varlistentry id="chkdupexe">
171 <term><command>chkdupexe</command></term>
172 <listitem>
173 <para>Finds duplicate executables</para>
174 <indexterm zone="ch-system-util-linux-ng chkdupexe">
175 <primary sortas="b-chkdupexe">chkdupexe</primary>
176 </indexterm>
177 </listitem>
178 </varlistentry>
179
180 <varlistentry id="col">
181 <term><command>col</command></term>
182 <listitem>
183 <para>Filters out reverse line feeds</para>
184 <indexterm zone="ch-system-util-linux-ng col">
185 <primary sortas="b-col">col</primary>
186 </indexterm>
187 </listitem>
188 </varlistentry>
189
190 <varlistentry id="colcrt">
191 <term><command>colcrt</command></term>
192 <listitem>
193 <para>Filters <command>nroff</command> output for terminals
194 that lack some capabilities, such as overstriking and half-lines</para>
195 <indexterm zone="ch-system-util-linux-ng colcrt">
196 <primary sortas="b-colcrt">colcrt</primary>
197 </indexterm>
198 </listitem>
199 </varlistentry>
200
201 <varlistentry id="colrm">
202 <term><command>colrm</command></term>
203 <listitem>
204 <para>Filters out the given columns</para>
205 <indexterm zone="ch-system-util-linux-ng colrm">
206 <primary sortas="b-colrm">colrm</primary>
207 </indexterm>
208 </listitem>
209 </varlistentry>
210
211 <varlistentry id="column">
212 <term><command>column</command></term>
213 <listitem>
214 <para>Formats a given file into multiple columns</para>
215 <indexterm zone="ch-system-util-linux-ng column">
216 <primary sortas="b-column">column</primary>
217 </indexterm>
218 </listitem>
219 </varlistentry>
220
221 <varlistentry id="ctrlaltdel">
222 <term><command>ctrlaltdel</command></term>
223 <listitem>
224 <para>Sets the function of the Ctrl+Alt+Del key combination to a
225 hard or a soft reset</para>
226 <indexterm zone="ch-system-util-linux-ng ctrlaltdel">
227 <primary sortas="b-ctrlaltdel">ctrlaltdel</primary>
228 </indexterm>
229 </listitem>
230 </varlistentry>
231
232 <varlistentry id="cytune">
233 <term><command>cytune</command></term>
234 <listitem>
235 <para>Tunes the parameters of the serial line drivers for
236 Cyclades cards</para>
237 <indexterm zone="ch-system-util-linux-ng cytune">
238 <primary sortas="b-cytune">cytune</primary>
239 </indexterm>
240 </listitem>
241 </varlistentry>
242
243 <varlistentry id="ddate">
244 <term><command>ddate</command></term>
245 <listitem>
246 <para>Gives the Discordian date or converts the given Gregorian date
247 to a Discordian one</para>
248 <indexterm zone="ch-system-util-linux-ng ddate">
249 <primary sortas="b-ddate">ddate</primary>
250 </indexterm>
251 </listitem>
252 </varlistentry>
253
254 <varlistentry id="delpart">
255 <term><command>delpart</command></term>
256 <listitem>
257 <para>Asks the kernel to remove a partition</para>
258 <indexterm zone="ch-system-util-linux-ng delpart">
259 <primary sortas="b-delpart">delpart</primary>
260 </indexterm>
261 </listitem>
262 </varlistentry>
263
264 <varlistentry id="dmesg">
265 <term><command>dmesg</command></term>
266 <listitem>
267 <para>Dumps the kernel boot messages</para>
268 <indexterm zone="ch-system-util-linux-ng dmesg">
269 <primary sortas="b-dmesg">dmesg</primary>
270 </indexterm>
271 </listitem>
272 </varlistentry>
273
274 <varlistentry id="fdformat">
275 <term><command>fdformat</command></term>
276 <listitem>
277 <para>Low-level formats a floppy disk</para>
278 <indexterm zone="ch-system-util-linux-ng fdformat">
279 <primary sortas="b-fdformat">fdformat</primary>
280 </indexterm>
281 </listitem>
282 </varlistentry>
283
284 <varlistentry id="fdisk">
285 <term><command>fdisk</command></term>
286 <listitem>
287 <para>Manipulates the partition table of the given device</para>
288 <indexterm zone="ch-system-util-linux-ng fdisk">
289 <primary sortas="b-fdisk">fdisk</primary>
290 </indexterm>
291 </listitem>
292 </varlistentry>
293
294 <varlistentry id="flock">
295 <term><command>flock</command></term>
296 <listitem>
297 <para>Acquires a file lock and then executes a command with the lock
298 held</para>
299 <indexterm zone="ch-system-util-linux-ng flock">
300 <primary sortas="b-flock">flock</primary>
301 </indexterm>
302 </listitem>
303 </varlistentry>
304
305 <varlistentry id="fsck.cramfs">
306 <term><command>fsck.cramfs</command></term>
307 <listitem>
308 <para>Performs a consistency check on the Cramfs file system on the
309 given device</para>
310 <indexterm zone="ch-system-util-linux-ng fsck.cramfs">
311 <primary sortas="b-fsck.cramfs">fsck.cramfs</primary>
312 </indexterm>
313 </listitem>
314 </varlistentry>
315
316 <varlistentry id="fsck.minix">
317 <term><command>fsck.minix</command></term>
318 <listitem>
319 <para>Performs a consistency check on the Minix file system on the
320 given device</para>
321 <indexterm zone="ch-system-util-linux-ng fsck.minix">
322 <primary sortas="b-fsck.minix">fsck.minix</primary>
323 </indexterm>
324 </listitem>
325 </varlistentry>
326
327 <varlistentry id="getopt">
328 <term><command>getopt</command></term>
329 <listitem>
330 <para>Parses options in the given command line</para>
331 <indexterm zone="ch-system-util-linux-ng getopt">
332 <primary sortas="b-getopt">getopt</primary>
333 </indexterm>
334 </listitem>
335 </varlistentry>
336
337 <varlistentry id="hexdump">
338 <term><command>hexdump</command></term>
339 <listitem>
340 <para>Dumps the given file in hexadecimal or in another given
341 format</para>
342 <indexterm zone="ch-system-util-linux-ng hexdump">
343 <primary sortas="b-hexdump">hexdump</primary>
344 </indexterm>
345 </listitem>
346 </varlistentry>
347
348 <varlistentry id="hwclock">
349 <term><command>hwclock</command></term>
350 <listitem>
351 <para>Reads or sets the system's hardware clock, also called
352 the Real-Time Clock (RTC) or Basic Input-Output System (BIOS)
353 clock</para>
354 <indexterm zone="ch-system-util-linux-ng hwclock">
355 <primary sortas="b-hwclock">hwclock</primary>
356 </indexterm>
357 </listitem>
358 </varlistentry>
359
360 <varlistentry id="ionice">
361 <term><command>ionice</command></term>
362 <listitem>
363 <para>Gives and sets program I/O scheduling class and priority</para>
364 <indexterm zone="ch-system-util-linux-ng ionice">
365 <primary sortas="b-ionice">ionice</primary>
366 </indexterm>
367 </listitem>
368 </varlistentry>
369
370 <varlistentry id="ipcrm">
371 <term><command>ipcrm</command></term>
372 <listitem>
373 <para>Removes the given Inter-Process Communication (IPC) resource</para>
374 <indexterm zone="ch-system-util-linux-ng ipcrm">
375 <primary sortas="b-ipcrm">ipcrm</primary>
376 </indexterm>
377 </listitem>
378 </varlistentry>
379
380 <varlistentry id="ipcs">
381 <term><command>ipcs</command></term>
382 <listitem>
383 <para>Provides IPC status information</para>
384 <indexterm zone="ch-system-util-linux-ng ipcs">
385 <primary sortas="b-ipcs">ipcs</primary>
386 </indexterm>
387 </listitem>
388 </varlistentry>
389
390 <varlistentry id="isosize">
391 <term><command>isosize</command></term>
392 <listitem>
393 <para>Reports the size of an iso9660 file system</para>
394 <indexterm zone="ch-system-util-linux-ng isosize">
395 <primary sortas="b-isosize">isosize</primary>
396 </indexterm>
397 </listitem>
398 </varlistentry>
399
400 <varlistentry id="line">
401 <term><command>line</command></term>
402 <listitem>
403 <para>Copies a single line</para>
404 <indexterm zone="ch-system-util-linux-ng line">
405 <primary sortas="b-line">line</primary>
406 </indexterm>
407 </listitem>
408 </varlistentry>
409
410 <varlistentry id="logger">
411 <term><command>logger</command></term>
412 <listitem>
413 <para>Enters the given message into the system log</para>
414 <indexterm zone="ch-system-util-linux-ng logger">
415 <primary sortas="b-logger">logger</primary>
416 </indexterm>
417 </listitem>
418 </varlistentry>
419
420 <varlistentry id="look">
421 <term><command>look</command></term>
422 <listitem>
423 <para>Displays lines that begin with the given string</para>
424 <indexterm zone="ch-system-util-linux-ng look">
425 <primary sortas="b-look">look</primary>
426 </indexterm>
427 </listitem>
428 </varlistentry>
429
430 <varlistentry id="losetup">
431 <term><command>losetup</command></term>
432 <listitem>
433 <para>Sets up and controls loop devices</para>
434 <indexterm zone="ch-system-util-linux-ng losetup">
435 <primary sortas="b-losetup">losetup</primary>
436 </indexterm>
437 </listitem>
438 </varlistentry>
439
440 <varlistentry id="mcookie">
441 <term><command>mcookie</command></term>
442 <listitem>
443 <para>Generates magic cookies (128-bit random hexadecimal numbers) for
444 <command>xauth</command></para>
445 <indexterm zone="ch-system-util-linux-ng mcookie">
446 <primary sortas="b-mcookie">mcookie</primary>
447 </indexterm>
448 </listitem>
449 </varlistentry>
450
451 <varlistentry id="mkfs">
452 <term><command>mkfs</command></term>
453 <listitem>
454 <para>Builds a file system on a device (usually a hard disk
455 partition)</para>
456 <indexterm zone="ch-system-util-linux-ng mkfs">
457 <primary sortas="b-mkfs">mkfs</primary>
458 </indexterm>
459 </listitem>
460 </varlistentry>
461
462 <varlistentry id="mkfs.bfs">
463 <term><command>mkfs.bfs</command></term>
464 <listitem>
465 <para>Creates a Santa Cruz Operations (SCO) bfs file system</para>
466 <indexterm zone="ch-system-util-linux-ng mkfs.bfs">
467 <primary sortas="b-mkfs.bfs">mkfs.bfs</primary>
468 </indexterm>
469 </listitem>
470 </varlistentry>
471
472 <varlistentry id="mkfs.cramfs">
473 <term><command>mkfs.cramfs</command></term>
474 <listitem>
475 <para>Creates a cramfs file system</para>
476 <indexterm zone="ch-system-util-linux-ng mkfs.cramfs">
477 <primary sortas="b-mkfs.cramfs">mkfs.cramfs</primary>
478 </indexterm>
479 </listitem>
480 </varlistentry>
481
482 <varlistentry id="mkfs.minix">
483 <term><command>mkfs.minix</command></term>
484 <listitem>
485 <para>Creates a Minix file system</para>
486 <indexterm zone="ch-system-util-linux-ng mkfs.minix">
487 <primary sortas="b-mkfs.minix">mkfs.minix</primary>
488 </indexterm>
489 </listitem>
490 </varlistentry>
491
492 <varlistentry id="mkswap">
493 <term><command>mkswap</command></term>
494 <listitem>
495 <para>Initializes the given device or file to be used as a swap
496 area</para>
497 <indexterm zone="ch-system-util-linux-ng mkswap">
498 <primary sortas="b-mkswap">mkswap</primary>
499 </indexterm>
500 </listitem>
501 </varlistentry>
502
503 <varlistentry id="more">
504 <term><command>more</command></term>
505 <listitem>
506 <para>A filter for paging through text one screen at a time</para>
507 <indexterm zone="ch-system-util-linux-ng more">
508 <primary sortas="b-more">more</primary>
509 </indexterm>
510 </listitem>
511 </varlistentry>
512
513 <varlistentry id="mount">
514 <term><command>mount</command></term>
515 <listitem>
516 <para>Attaches the file system on the given device to a specified
517 directory in the file-system tree</para>
518 <indexterm zone="ch-system-util-linux-ng mount">
519 <primary sortas="b-mount">mount</primary>
520 </indexterm>
521 </listitem>
522 </varlistentry>
523
524 <varlistentry id="namei">
525 <term><command>namei</command></term>
526 <listitem>
527 <para>Shows the symbolic links in the given pathnames</para>
528 <indexterm zone="ch-system-util-linux-ng namei">
529 <primary sortas="b-namei">namei</primary>
530 </indexterm>
531 </listitem>
532 </varlistentry>
533
534 <varlistentry id="partx">
535 <term><command>partx</command></term>
536 <listitem>
537 <para>Tells the kernel about the presence and numbering of on-disk
538 partitions</para>
539 <indexterm zone="ch-system-util-linux-ng partx">
540 <primary sortas="b-partx">partx</primary>
541 </indexterm>
542 </listitem>
543 </varlistentry>
544
545 <varlistentry id="pg">
546 <term><command>pg</command></term>
547 <listitem>
548 <para>Displays a text file one screen full at a time</para>
549 <indexterm zone="ch-system-util-linux-ng pg">
550 <primary sortas="b-pg">pg</primary>
551 </indexterm>
552 </listitem>
553 </varlistentry>
554
555 <varlistentry id="pivot_root">
556 <term><command>pivot_root</command></term>
557 <listitem>
558 <para>Makes the given file system the new root file system of the
559 current process</para>
560 <indexterm zone="ch-system-util-linux-ng pivot_root">
561 <primary sortas="b-pivot_root">pivot_root</primary>
562 </indexterm>
563 </listitem>
564 </varlistentry>
565
566 <varlistentry id="readprofile">
567 <term><command>readprofile</command></term>
568 <listitem>
569 <para>Reads kernel profiling information</para>
570 <indexterm zone="ch-system-util-linux-ng readprofile">
571 <primary sortas="b-readprofile">readprofile</primary>
572 </indexterm>
573 </listitem>
574 </varlistentry>
575
576 <varlistentry id="rename">
577 <term><command>rename</command></term>
578 <listitem>
579 <para>Renames the given files, replacing a given string with
580 another</para>
581 <indexterm zone="ch-system-util-linux-ng rename">
582 <primary sortas="b-rename">rename</primary>
583 </indexterm>
584 </listitem>
585 </varlistentry>
586
587 <varlistentry id="renice">
588 <term><command>renice</command></term>
589 <listitem>
590 <para>Alters the priority of running processes</para>
591 <indexterm zone="ch-system-util-linux-ng renice">
592 <primary sortas="b-renice">renice</primary>
593 </indexterm>
594 </listitem>
595 </varlistentry>
596
597 <varlistentry id="rev">
598 <term><command>rev</command></term>
599 <listitem>
600 <para>Reverses the lines of a given file</para>
601 <indexterm zone="ch-system-util-linux-ng rev">
602 <primary sortas="b-rev">rev</primary>
603 </indexterm>
604 </listitem>
605 </varlistentry>
606
607 <varlistentry id="rtcwake">
608 <term><command>rtcwake</command></term>
609 <listitem>
610 <para>Enters a system sleep state until a specified wakeup time</para>
611 <indexterm zone="ch-system-util-linux-ng rtcwake">
612 <primary sortas="b-rtcwake">rtcwake</primary>
613 </indexterm>
614 </listitem>
615 </varlistentry>
616
617 <varlistentry id="script">
618 <term><command>script</command></term>
619 <listitem>
620 <para>Makes a typescript of a terminal session</para>
621 <indexterm zone="ch-system-util-linux-ng script">
622 <primary sortas="b-script">script</primary>
623 </indexterm>
624 </listitem>
625 </varlistentry>
626
627 <varlistentry id="scriptreplay">
628 <term><command>scriptreplay</command></term>
629 <listitem>
630 <para>Plays back typescripts created by <command>script</command></para>
631 <indexterm zone="ch-system-util-linux-ng scriptreplay">
632 <primary sortas="b-scriptreplay">scriptreplay</primary>
633 </indexterm>
634 </listitem>
635 </varlistentry>
636
637 <varlistentry id="setarch">
638 <term><command>setarch</command></term>
639 <listitem>
640 <para>Changes reported architecture in new program environment and
641 sets personality flags</para>
642 <indexterm zone="ch-system-util-linux-ng setarch">
643 <primary sortas="b-setarch">setarch</primary>
644 </indexterm>
645 </listitem>
646 </varlistentry>
647
648 <varlistentry id="setsid">
649 <term><command>setsid</command></term>
650 <listitem>
651 <para>Runs the given program in a new session</para>
652 <indexterm zone="ch-system-util-linux-ng setsid">
653 <primary sortas="b-setsid">setsid</primary>
654 </indexterm>
655 </listitem>
656 </varlistentry>
657
658 <varlistentry id="setterm">
659 <term><command>setterm</command></term>
660 <listitem>
661 <para>Sets terminal attributes</para>
662 <indexterm zone="ch-system-util-linux-ng setterm">
663 <primary sortas="b-setterm">setterm</primary>
664 </indexterm>
665 </listitem>
666 </varlistentry>
667
668 <varlistentry id="sfdisk">
669 <term><command>sfdisk</command></term>
670 <listitem>
671 <para>A disk partition table manipulator</para>
672 <indexterm zone="ch-system-util-linux-ng sfdisk">
673 <primary sortas="b-sfdisk">sfdisk</primary>
674 </indexterm>
675 </listitem>
676 </varlistentry>
677
678 <varlistentry id="swapoff">
679 <term><command>swapoff</command></term>
680 <listitem>
681 <para>Disables devices and files for paging and swapping</para>
682 <indexterm zone="ch-system-util-linux-ng swapoff">
683 <primary sortas="b-swapoff">swapoff</primary>
684 </indexterm>
685 </listitem>
686 </varlistentry>
687
688 <varlistentry id="swapon">
689 <term><command>swapon</command></term>
690 <listitem>
691 <para>Enables devices and files for paging and swapping and
692 lists the devices and files currently in use</para>
693 <indexterm zone="ch-system-util-linux-ng swapon">
694 <primary sortas="b-swapon">swapon</primary>
695 </indexterm>
696 </listitem>
697 </varlistentry>
698
699 <varlistentry id="tailf">
700 <term><command>tailf</command></term>
701 <listitem>
702 <para>Tracks the growth of a log file. Displays the last 10 lines
703 of a log file, then continues displaying any new entries in the
704 log file as they are created</para>
705 <indexterm zone="ch-system-util-linux-ng tailf">
706 <primary sortas="b-tailf">tailf</primary>
707 </indexterm>
708 </listitem>
709 </varlistentry>
710
711 <varlistentry id="taskset">
712 <term><command>taskset</command></term>
713 <listitem>
714 <para>Retrieves or sets a process's CPU affinity</para>
715 <indexterm zone="ch-system-util-linux-ng taskset">
716 <primary sortas="b-taskset">taskset</primary>
717 </indexterm>
718 </listitem>
719 </varlistentry>
720
721 <varlistentry id="tunelp">
722 <term><command>tunelp</command></term>
723 <listitem>
724 <para>Tunes the parameters of the line printer</para>
725 <indexterm zone="ch-system-util-linux-ng tunelp">
726 <primary sortas="b-tunelp">tunelp</primary>
727 </indexterm>
728 </listitem>
729 </varlistentry>
730
731 <varlistentry id="ul">
732 <term><command>ul</command></term>
733 <listitem>
734 <para>A filter for translating underscores into escape sequences
735 indicating underlining for the terminal in use</para>
736 <indexterm zone="ch-system-util-linux-ng ul">
737 <primary sortas="b-ul">ul</primary>
738 </indexterm>
739 </listitem>
740 </varlistentry>
741
742 <varlistentry id="umount">
743 <term><command>umount</command></term>
744 <listitem>
745 <para>Disconnects a file system from the system's file tree</para>
746 <indexterm zone="ch-system-util-linux-ng umount">
747 <primary sortas="b-umount">umount</primary>
748 </indexterm>
749 </listitem>
750 </varlistentry>
751
752 <varlistentry id="whereis">
753 <term><command>whereis</command></term>
754 <listitem>
755 <para>Reports the location of the binary, source, and man page
756 for the given command</para>
757 <indexterm zone="ch-system-util-linux-ng whereis">
758 <primary sortas="b-whereis">whereis</primary>
759 </indexterm>
760 </listitem>
761 </varlistentry>
762
763 <varlistentry id="write">
764 <term><command>write</command></term>
765 <listitem>
766 <para>Sends a message to the given user <emphasis>if</emphasis> that
767 user has not disabled receipt of such messages</para>
768 <indexterm zone="ch-system-util-linux-ng write">
769 <primary sortas="b-write">write</primary>
770 </indexterm>
771 </listitem>
772 </varlistentry>
773
774 </variablelist>
775
776 </sect2>
777
778</sect1>
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