source: BOOK/final-system/common/util-linux.xml@ 1400499

clfs-1.2 clfs-2.1 clfs-3.0.0-systemd clfs-3.0.0-sysvinit systemd sysvinit
Last change on this file since 1400499 was cc1ccdd, checked in by Chris Staub <chris@…>, 18 years ago

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[3f8be484]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-util-linux" role="wrap">
9 <?dbhtml filename="util-linux.html"?>
10
11 <title>Util-linux-&util-linux-version;</title>
12
13 <indexterm zone="ch-system-util-linux">
14 <primary sortas="a-Util-linux">Util-linux</primary>
15 </indexterm>
16
17 <sect2 role="package">
18 <title/>
19
20 <para>The Util-linux package contains miscellaneous utility programs.
21 Among them are utilities for handling file systems, consoles, partitions,
22 and messages.</para>
23
24
25 </sect2>
26
27 <sect2 id="fhs-util-linux" 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
[a40edab]38mkdir -pv /var/lib/hwclock</userinput></screen>
[3f8be484]39
40 </sect2>
41
42 <sect2 role="installation">
43 <title>Installation of Util-linux</title>
44
[e0e40d3]45 <para os="p1">Util-linux fails to compile against newer versions of
[4f049972]46 Linux kernel headers. The following patch properly fixes this issue:</para>
[3f8be484]47
[e0e40d3]48<screen os="p2"><userinput>patch -Np1 -i ../&util-linux-cramfs-patch;</userinput></screen>
[3f8be484]49
[e2de6f8]50 <para os="p3">The following patch fixes build issues with GCC &gcc-version;:</para>
[3f8be484]51
[e0e40d3]52<screen os="p4"><userinput>patch -Np1 -i ../&util-linux-gcc4_fixes-patch;</userinput></screen>
[3f8be484]53
[cc1ccdd]54 <para os="p5">The following patch fixes swapon.c - it tries to find the variable R_OK, but
[480f54b]55 the header that has R_OK is not included:</para>
56
57<screen os="p6"><userinput>patch -Np1 -i ../&util-linux-missing_header-patch;</userinput></screen>
58
[e0e40d3]59 <para os="a">Prepare Util-linux for compilation:</para>
[3f8be484]60
[e0e40d3]61<screen os="b"><userinput>./configure</userinput></screen>
[3f8be484]62
[e0e40d3]63 <para os="c">Compile the package:</para>
[3f8be484]64
[e0e40d3]65<screen os="d"><userinput>make HAVE_KILL=yes HAVE_SLN=yes</userinput></screen>
[3f8be484]66
[e0e40d3]67 <variablelist os="e">
[3f8be484]68 <title>The meaning of the make parameters:</title>
69
[e0e40d3]70 <varlistentry os="e1">
[3f8be484]71 <term><parameter>HAVE_KILL=yes</parameter></term>
72 <listitem>
73 <para>This prevents the <command>kill</command> program (already
74 installed by Procps) from being built and installed again.</para>
75 </listitem>
76 </varlistentry>
77
[e0e40d3]78 <varlistentry os="e2">
[3f8be484]79 <term><parameter>HAVE_SLN=yes</parameter></term>
80 <listitem>
81 <para>This prevents the <command>sln</command> program (a
82 statically linked version of <command>ln</command> already installed
83 by Glibc) from being built and installed again.</para>
84 </listitem>
85 </varlistentry>
86
87 </variablelist>
88
[e0e40d3]89 <para os="f">This package does not come with a test suite.</para>
[3f8be484]90
[e0e40d3]91 <para os="g">Install the package and move the <command>logger</command> binary
[3f8be484]92 to <filename class="directory">/bin</filename> as it is needed by the
[fb40919]93 CLFS-Bootscripts package:</para>
[3f8be484]94
[e0e40d3]95<screen os="h"><userinput>make HAVE_KILL=yes HAVE_SLN=yes install
[6c4e93e]96mv -v /usr/bin/logger /bin</userinput></screen>
[3f8be484]97
98 </sect2>
99
100 <sect2 id="contents-util-linux" role="content">
101 <title>Contents of Util-linux</title>
102
103 <segmentedlist>
104 <segtitle>Installed programs</segtitle>
105
106 <seglistitem>
107 <seg>agetty, arch, blockdev, cal, cfdisk, chkdupexe, col, colcrt,
108 colrm, column, ctrlaltdel, cytune, ddate, dmesg, elvtune, fdformat,
[e29fb58]109 fdisk, flock, fsck.cramfs, fsck.minix, getopt, hexdump, hwclock, ipcrm,
[3f8be484]110 ipcs, isosize, line, logger, look, losetup, mcookie, mkfs, mkfs.bfs,
111 mkfs.cramfs, mkfs.minix, mkswap, more, mount, namei, pg, pivot_root,
112 ramsize (link to rdev), raw, rdev, readprofile, rename, renice, rev,
113 rootflags (link to rdev), script, setfdprm, setsid, setterm, sfdisk,
[e29fb58]114 swapoff (link to swapon), swapon, tailf, tunelp, ul, umount, vidmode
[3f8be484]115 (link to rdev), whereis, and write</seg>
116 </seglistitem>
117 </segmentedlist>
118
119 <variablelist>
120 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
121 <?dbfo list-presentation="list"?>
122 <?dbhtml list-presentation="table"?>
123
124 <varlistentry id="agetty">
125 <term><command>agetty</command></term>
126 <listitem>
127 <para>Opens a tty port, prompts for a login name,
128 and then invokes the <command>login</command> program</para>
129 <indexterm zone="ch-system-util-linux agetty">
130 <primary sortas="b-agetty">agetty</primary>
131 </indexterm>
132 </listitem>
133 </varlistentry>
134
135 <varlistentry id="arch">
136 <term><command>arch</command></term>
137 <listitem>
138 <para>Reports the machine's architecture</para>
139 <indexterm zone="ch-system-util-linux arch">
140 <primary sortas="b-arch">arch</primary>
141 </indexterm>
142 </listitem>
143 </varlistentry>
144
145 <varlistentry id="blockdev">
146 <term><command>blockdev</command></term>
147 <listitem>
148 <para>Allows users to call block device ioctls from the command
149 line</para>
150 <indexterm zone="ch-system-util-linux blockdev">
151 <primary sortas="b-blockdev">blockdev</primary>
152 </indexterm>
153 </listitem>
154 </varlistentry>
155
156 <varlistentry id="cal">
157 <term><command>cal</command></term>
158 <listitem>
159 <para>Displays a simple calendar</para>
160 <indexterm zone="ch-system-util-linux cal">
161 <primary sortas="b-cal">cal</primary>
162 </indexterm>
163 </listitem>
164 </varlistentry>
165
166 <varlistentry id="cfdisk">
167 <term><command>cfdisk</command></term>
168 <listitem>
169 <para>Manipulates the partition table of the given device</para>
170 <indexterm zone="ch-system-util-linux cfdisk">
171 <primary sortas="b-cfdisk">cfdisk</primary>
172 </indexterm>
173 </listitem>
174 </varlistentry>
175
176 <varlistentry id="chkdupexe">
177 <term><command>chkdupexe</command></term>
178 <listitem>
179 <para>Finds duplicate executables</para>
180 <indexterm zone="ch-system-util-linux chkdupexe">
181 <primary sortas="b-chkdupexe">chkdupexe</primary>
182 </indexterm>
183 </listitem>
184 </varlistentry>
185
186 <varlistentry id="col">
187 <term><command>col</command></term>
188 <listitem>
189 <para>Filters out reverse line feeds</para>
190 <indexterm zone="ch-system-util-linux col">
191 <primary sortas="b-col">col</primary>
192 </indexterm>
193 </listitem>
194 </varlistentry>
195
196 <varlistentry id="colcrt">
197 <term><command>colcrt</command></term>
198 <listitem>
199 <para>Filters <command>nroff</command> output for terminals
200 that lack some capabilities, such as overstriking and half-lines</para>
201 <indexterm zone="ch-system-util-linux colcrt">
202 <primary sortas="b-colcrt">colcrt</primary>
203 </indexterm>
204 </listitem>
205 </varlistentry>
206
207 <varlistentry id="colrm">
208 <term><command>colrm</command></term>
209 <listitem>
210 <para>Filters out the given columns</para>
211 <indexterm zone="ch-system-util-linux colrm">
212 <primary sortas="b-colrm">colrm</primary>
213 </indexterm>
214 </listitem>
215 </varlistentry>
216
217 <varlistentry id="column">
218 <term><command>column</command></term>
219 <listitem>
220 <para>Formats a given file into multiple columns</para>
221 <indexterm zone="ch-system-util-linux column">
222 <primary sortas="b-column">column</primary>
223 </indexterm>
224 </listitem>
225 </varlistentry>
226
227 <varlistentry id="ctrlaltdel">
228 <term><command>ctrlaltdel</command></term>
229 <listitem>
230 <para>Sets the function of the Ctrl+Alt+Del key combination to a
231 hard or a soft reset</para>
232 <indexterm zone="ch-system-util-linux ctrlaltdel">
233 <primary sortas="b-ctrlaltdel">ctrlaltdel</primary>
234 </indexterm>
235 </listitem>
236 </varlistentry>
237
238 <varlistentry id="cytune">
239 <term><command>cytune</command></term>
240 <listitem>
241 <para>Tunes the parameters of the serial line drivers for
242 Cyclades cards</para>
243 <indexterm zone="ch-system-util-linux cytune">
244 <primary sortas="b-cytune">cytune</primary>
245 </indexterm>
246 </listitem>
247 </varlistentry>
248
249 <varlistentry id="ddate">
250 <term><command>ddate</command></term>
251 <listitem>
252 <para>Gives the Discordian date or converts the given Gregorian date
253 to a Discordian one</para>
254 <indexterm zone="ch-system-util-linux ddate">
255 <primary sortas="b-ddate">ddate</primary>
256 </indexterm>
257 </listitem>
258 </varlistentry>
259
260 <varlistentry id="dmesg">
261 <term><command>dmesg</command></term>
262 <listitem>
263 <para>Dumps the kernel boot messages</para>
264 <indexterm zone="ch-system-util-linux dmesg">
265 <primary sortas="b-dmesg">dmesg</primary>
266 </indexterm>
267 </listitem>
268 </varlistentry>
269
270 <varlistentry id="elvtune">
271 <term><command>elvtune</command></term>
272 <listitem>
273 <para>Tunes the performance and interactivity of a block
274 device</para>
275 <indexterm zone="ch-system-util-linux elvtune">
276 <primary sortas="b-elvtune">elvtune</primary>
277 </indexterm>
278 </listitem>
279 </varlistentry>
280
281 <varlistentry id="fdformat">
282 <term><command>fdformat</command></term>
283 <listitem>
284 <para>Low-level formats a floppy disk</para>
285 <indexterm zone="ch-system-util-linux fdformat">
286 <primary sortas="b-fdformat">fdformat</primary>
287 </indexterm>
288 </listitem>
289 </varlistentry>
290
291 <varlistentry id="fdisk">
292 <term><command>fdisk</command></term>
293 <listitem>
294 <para>Manipulates the partition table of the given device</para>
295 <indexterm zone="ch-system-util-linux fdisk">
296 <primary sortas="b-fdisk">fdisk</primary>
297 </indexterm>
298 </listitem>
299 </varlistentry>
300
[e29fb58]301 <varlistentry id="flock">
302 <term><command>flock</command></term>
303 <listitem>
304 <para>Acquires a file lock and then executes a command with the lock
305 held</para>
306 <indexterm zone="ch-system-util-linux flock">
307 <primary sortas="b-flock">flock</primary>
308 </indexterm>
309 </listitem>
310 </varlistentry>
311
[3f8be484]312 <varlistentry id="fsck.cramfs">
313 <term><command>fsck.cramfs</command></term>
314 <listitem>
315 <para>Performs a consistency check on the Cramfs file system on the
316 given device</para>
317 <indexterm zone="ch-system-util-linux fsck.cramfs">
318 <primary sortas="b-fsck.cramfs">fsck.cramfs</primary>
319 </indexterm>
320 </listitem>
321 </varlistentry>
322
323 <varlistentry id="fsck.minix">
324 <term><command>fsck.minix</command></term>
325 <listitem>
326 <para>Performs a consistency check on the Minix file system on the
327 given device</para>
328 <indexterm zone="ch-system-util-linux fsck.minix">
329 <primary sortas="b-fsck.minix">fsck.minix</primary>
330 </indexterm>
331 </listitem>
332 </varlistentry>
333
334 <varlistentry id="getopt">
335 <term><command>getopt</command></term>
336 <listitem>
337 <para>Parses options in the given command line</para>
338 <indexterm zone="ch-system-util-linux getopt">
339 <primary sortas="b-getopt">getopt</primary>
340 </indexterm>
341 </listitem>
342 </varlistentry>
343
344 <varlistentry id="hexdump">
345 <term><command>hexdump</command></term>
346 <listitem>
347 <para>Dumps the given file in hexadecimal or in another given
348 format</para>
349 <indexterm zone="ch-system-util-linux hexdump">
350 <primary sortas="b-hexdump">hexdump</primary>
351 </indexterm>
352 </listitem>
353 </varlistentry>
354
355 <varlistentry id="hwclock">
356 <term><command>hwclock</command></term>
357 <listitem>
358 <para>Reads or sets the system's hardware clock, also called
359 the Real-Time Clock (RTC) or Basic Input-Output System (BIOS)
360 clock</para>
361 <indexterm zone="ch-system-util-linux hwclock">
362 <primary sortas="b-hwclock">hwclock</primary>
363 </indexterm>
364 </listitem>
365 </varlistentry>
366
367 <varlistentry id="ipcrm">
368 <term><command>ipcrm</command></term>
369 <listitem>
370 <para>Removes the given Inter-Process Communication (IPC) resource</para>
371 <indexterm zone="ch-system-util-linux ipcrm">
372 <primary sortas="b-ipcrm">ipcrm</primary>
373 </indexterm>
374 </listitem>
375 </varlistentry>
376
377 <varlistentry id="ipcs">
378 <term><command>ipcs</command></term>
379 <listitem>
380 <para>Provides IPC status information</para>
381 <indexterm zone="ch-system-util-linux ipcs">
382 <primary sortas="b-ipcs">ipcs</primary>
383 </indexterm>
384 </listitem>
385 </varlistentry>
386
387 <varlistentry id="isosize">
388 <term><command>isosize</command></term>
389 <listitem>
390 <para>Reports the size of an iso9660 file system</para>
391 <indexterm zone="ch-system-util-linux isosize">
392 <primary sortas="b-isosize">isosize</primary>
393 </indexterm>
394 </listitem>
395 </varlistentry>
396
397 <varlistentry id="line">
398 <term><command>line</command></term>
399 <listitem>
400 <para>Copies a single line</para>
401 <indexterm zone="ch-system-util-linux line">
402 <primary sortas="b-line">line</primary>
403 </indexterm>
404 </listitem>
405 </varlistentry>
406
407 <varlistentry id="logger">
408 <term><command>logger</command></term>
409 <listitem>
410 <para>Enters the given message into the system log</para>
411 <indexterm zone="ch-system-util-linux logger">
412 <primary sortas="b-logger">logger</primary>
413 </indexterm>
414 </listitem>
415 </varlistentry>
416
417 <varlistentry id="look">
418 <term><command>look</command></term>
419 <listitem>
420 <para>Displays lines that begin with the given string</para>
421 <indexterm zone="ch-system-util-linux look">
422 <primary sortas="b-look">look</primary>
423 </indexterm>
424 </listitem>
425 </varlistentry>
426
427 <varlistentry id="losetup">
428 <term><command>losetup</command></term>
429 <listitem>
430 <para>Sets up and controls loop devices</para>
431 <indexterm zone="ch-system-util-linux losetup">
432 <primary sortas="b-losetup">losetup</primary>
433 </indexterm>
434 </listitem>
435 </varlistentry>
436
437 <varlistentry id="mcookie">
438 <term><command>mcookie</command></term>
439 <listitem>
440 <para>Generates magic cookies (128-bit random hexadecimal numbers) for
441 <command>xauth</command></para>
442 <indexterm zone="ch-system-util-linux mcookie">
443 <primary sortas="b-mcookie">mcookie</primary>
444 </indexterm>
445 </listitem>
446 </varlistentry>
447
448 <varlistentry id="mkfs">
449 <term><command>mkfs</command></term>
450 <listitem>
451 <para>Builds a file system on a device (usually a hard disk
452 partition)</para>
453 <indexterm zone="ch-system-util-linux mkfs">
454 <primary sortas="b-mkfs">mkfs</primary>
455 </indexterm>
456 </listitem>
457 </varlistentry>
458
459 <varlistentry id="mkfs.bfs">
460 <term><command>mkfs.bfs</command></term>
461 <listitem>
462 <para>Creates a Santa Cruz Operations (SCO) bfs file system</para>
463 <indexterm zone="ch-system-util-linux mkfs.bfs">
464 <primary sortas="b-mkfs.bfs">mkfs.bfs</primary>
465 </indexterm>
466 </listitem>
467 </varlistentry>
468
469 <varlistentry id="mkfs.cramfs">
470 <term><command>mkfs.cramfs</command></term>
471 <listitem>
472 <para>Creates a cramfs file system</para>
473 <indexterm zone="ch-system-util-linux mkfs.cramfs">
474 <primary sortas="b-mkfs.cramfs">mkfs.cramfs</primary>
475 </indexterm>
476 </listitem>
477 </varlistentry>
478
479 <varlistentry id="mkfs.minix">
480 <term><command>mkfs.minix</command></term>
481 <listitem>
482 <para>Creates a Minix file system</para>
483 <indexterm zone="ch-system-util-linux mkfs.minix">
484 <primary sortas="b-mkfs.minix">mkfs.minix</primary>
485 </indexterm>
486 </listitem>
487 </varlistentry>
488
489 <varlistentry id="mkswap">
490 <term><command>mkswap</command></term>
491 <listitem>
492 <para>Initializes the given device or file to be used as a swap
493 area</para>
494 <indexterm zone="ch-system-util-linux mkswap">
495 <primary sortas="b-mkswap">mkswap</primary>
496 </indexterm>
497 </listitem>
498 </varlistentry>
499
500 <varlistentry id="more">
501 <term><command>more</command></term>
502 <listitem>
503 <para>A filter for paging through text one screen at a time</para>
504 <indexterm zone="ch-system-util-linux more">
505 <primary sortas="b-more">more</primary>
506 </indexterm>
507 </listitem>
508 </varlistentry>
509
510 <varlistentry id="mount">
511 <term><command>mount</command></term>
512 <listitem>
513 <para>Attaches the file system on the given device to a specified
514 directory in the file-system tree</para>
515 <indexterm zone="ch-system-util-linux mount">
516 <primary sortas="b-mount">mount</primary>
517 </indexterm>
518 </listitem>
519 </varlistentry>
520
521 <varlistentry id="namei">
522 <term><command>namei</command></term>
523 <listitem>
524 <para>Shows the symbolic links in the given pathnames</para>
525 <indexterm zone="ch-system-util-linux namei">
526 <primary sortas="b-namei">namei</primary>
527 </indexterm>
528 </listitem>
529 </varlistentry>
530
531 <varlistentry id="pg">
532 <term><command>pg</command></term>
533 <listitem>
534 <para>Displays a text file one screen full at a time</para>
535 <indexterm zone="ch-system-util-linux pg">
536 <primary sortas="b-pg">pg</primary>
537 </indexterm>
538 </listitem>
539 </varlistentry>
540
541 <varlistentry id="pivot_root">
542 <term><command>pivot_root</command></term>
543 <listitem>
544 <para>Makes the given file system the new root file system of the
545 current process</para>
546 <indexterm zone="ch-system-util-linux pivot_root">
547 <primary sortas="b-pivot_root">pivot_root</primary>
548 </indexterm>
549 </listitem>
550 </varlistentry>
551
552 <varlistentry id="ramsize">
553 <term><command>ramsize</command></term>
554 <listitem>
555 <para>Sets the size of the RAM disk in a bootable image</para>
556 <indexterm zone="ch-system-util-linux ramsize">
557 <primary sortas="b-ramsize">ramsize</primary>
558 </indexterm>
559 </listitem>
560 </varlistentry>
561
562 <varlistentry id="raw">
563 <term><command>raw</command></term>
564 <listitem>
565 <para>Used to bind a Linux raw character device to a block
566 device</para>
567 <indexterm zone="ch-system-util-linux raw">
568 <primary sortas="b-raw">raw</primary>
569 </indexterm>
570 </listitem>
571 </varlistentry>
572
573 <varlistentry id="rdev">
574 <term><command>rdev</command></term>
575 <listitem>
576 <para>Queries and sets the root device, among other things, in a
577 bootable image</para>
578 <indexterm zone="ch-system-util-linux rdev">
579 <primary sortas="b-rdev">rdev</primary>
580 </indexterm>
581 </listitem>
582 </varlistentry>
583
584 <varlistentry id="readprofile">
585 <term><command>readprofile</command></term>
586 <listitem>
587 <para>Reads kernel profiling information</para>
588 <indexterm zone="ch-system-util-linux readprofile">
589 <primary sortas="b-readprofile">readprofile</primary>
590 </indexterm>
591 </listitem>
592 </varlistentry>
593
594 <varlistentry id="rename">
595 <term><command>rename</command></term>
596 <listitem>
597 <para>Renames the given files, replacing a given string with
598 another</para>
599 <indexterm zone="ch-system-util-linux rename">
600 <primary sortas="b-rename">rename</primary>
601 </indexterm>
602 </listitem>
603 </varlistentry>
604
605 <varlistentry id="renice">
606 <term><command>renice</command></term>
607 <listitem>
608 <para>Alters the priority of running processes</para>
609 <indexterm zone="ch-system-util-linux renice">
610 <primary sortas="b-renice">renice</primary>
611 </indexterm>
612 </listitem>
613 </varlistentry>
614
615 <varlistentry id="rev">
616 <term><command>rev</command></term>
617 <listitem>
618 <para>Reverses the lines of a given file</para>
619 <indexterm zone="ch-system-util-linux rev">
620 <primary sortas="b-rev">rev</primary>
621 </indexterm>
622 </listitem>
623 </varlistentry>
624
625 <varlistentry id="rootflags">
626 <term><command>rootflags</command></term>
627 <listitem>
628 <para>Sets the rootflags in a bootable image</para>
629 <indexterm zone="ch-system-util-linux rootflags">
630 <primary sortas="b-rootflags">rootflags</primary>
631 </indexterm>
632 </listitem>
633 </varlistentry>
634
635 <varlistentry id="script">
636 <term><command>script</command></term>
637 <listitem>
638 <para>Makes a typescript of a terminal session</para>
639 <indexterm zone="ch-system-util-linux script">
640 <primary sortas="b-script">script</primary>
641 </indexterm>
642 </listitem>
643 </varlistentry>
644
645 <varlistentry id="setfdprm">
646 <term><command>setfdprm</command></term>
647 <listitem>
648 <para>Sets user-provided floppy disk parameters</para>
649 <indexterm zone="ch-system-util-linux setfdprm">
650 <primary sortas="b-setfdprm">setfdprm</primary>
651 </indexterm>
652 </listitem>
653 </varlistentry>
654
655 <varlistentry id="setsid">
656 <term><command>setsid</command></term>
657 <listitem>
658 <para>Runs the given program in a new session</para>
659 <indexterm zone="ch-system-util-linux setsid">
660 <primary sortas="b-setsid">setsid</primary>
661 </indexterm>
662 </listitem>
663 </varlistentry>
664
665 <varlistentry id="setterm">
666 <term><command>setterm</command></term>
667 <listitem>
668 <para>Sets terminal attributes</para>
669 <indexterm zone="ch-system-util-linux setterm">
670 <primary sortas="b-setterm">setterm</primary>
671 </indexterm>
672 </listitem>
673 </varlistentry>
674
675 <varlistentry id="sfdisk">
676 <term><command>sfdisk</command></term>
677 <listitem>
678 <para>A disk partition table manipulator</para>
679 <indexterm zone="ch-system-util-linux sfdisk">
680 <primary sortas="b-sfdisk">sfdisk</primary>
681 </indexterm>
682 </listitem>
683 </varlistentry>
684
685 <varlistentry id="swapoff">
686 <term><command>swapoff</command></term>
687 <listitem>
688 <para>Disables devices and files for paging and swapping</para>
689 <indexterm zone="ch-system-util-linux swapoff">
690 <primary sortas="b-swapoff">swapoff</primary>
691 </indexterm>
692 </listitem>
693 </varlistentry>
694
695 <varlistentry id="swapon">
696 <term><command>swapon</command></term>
697 <listitem>
698 <para>Enables devices and files for paging and swapping and
699 lists the devices and files currently in use</para>
700 <indexterm zone="ch-system-util-linux swapon">
701 <primary sortas="b-swapon">swapon</primary>
702 </indexterm>
703 </listitem>
704 </varlistentry>
705
[e29fb58]706 <varlistentry id="tailf">
707 <term><command>tailf</command></term>
708 <listitem>
709 <para>Tracks the growth of a log file. Displays the last 10 lines
710 of a log file, then continues displaying any new entries in the
711 log file as they are created</para>
712 <indexterm zone="ch-system-util-linux tailf">
713 <primary sortas="b-tailf">tailf</primary>
714 </indexterm>
715 </listitem>
716 </varlistentry>
717
[3f8be484]718 <varlistentry id="tunelp">
719 <term><command>tunelp</command></term>
720 <listitem>
721 <para>Tunes the parameters of the line printer</para>
722 <indexterm zone="ch-system-util-linux tunelp">
723 <primary sortas="b-tunelp">tunelp</primary>
724 </indexterm>
725 </listitem>
726 </varlistentry>
727
728 <varlistentry id="ul">
729 <term><command>ul</command></term>
730 <listitem>
731 <para>A filter for translating underscores into escape sequences
732 indicating underlining for the terminal in use</para>
733 <indexterm zone="ch-system-util-linux ul">
734 <primary sortas="b-ul">ul</primary>
735 </indexterm>
736 </listitem>
737 </varlistentry>
738
739 <varlistentry id="umount">
740 <term><command>umount</command></term>
741 <listitem>
742 <para>Disconnects a file system from the system's file tree</para>
743 <indexterm zone="ch-system-util-linux umount">
744 <primary sortas="b-umount">umount</primary>
745 </indexterm>
746 </listitem>
747 </varlistentry>
748
749 <varlistentry id="vidmode">
750 <term><command>vidmode</command></term>
751 <listitem>
752 <para>Sets the video mode in a bootable image</para>
753 <indexterm zone="ch-system-util-linux vidmode">
754 <primary sortas="b-vidmode">vidmode</primary>
755 </indexterm>
756 </listitem>
757 </varlistentry>
758
759 <varlistentry id="whereis">
760 <term><command>whereis</command></term>
761 <listitem>
762 <para>Reports the location of the binary, source, and man page
763 for the given command</para>
764 <indexterm zone="ch-system-util-linux whereis">
765 <primary sortas="b-whereis">whereis</primary>
766 </indexterm>
767 </listitem>
768 </varlistentry>
769
770 <varlistentry id="write">
771 <term><command>write</command></term>
772 <listitem>
773 <para>Sends a message to the given user <emphasis>if</emphasis> that
774 user has not disabled receipt of such messages</para>
775 <indexterm zone="ch-system-util-linux write">
776 <primary sortas="b-write">write</primary>
777 </indexterm>
778 </listitem>
779 </varlistentry>
780
781 </variablelist>
782
783 </sect2>
784
785</sect1>
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