source: chapter06/util-linux.xml@ 9c5cdd8a

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Last change on this file since 9c5cdd8a was 18fa909, checked in by Pierre Labastie <pieere@…>, 4 years ago

Merge the 2 role="installation" sections in util-linux, using the same layout
as for glibc to explain the FHS compliance. Note also that /var/lib/hwclock
only contains adjtime, so it is not a "storage location" IMHO.

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@11867 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

  • Property mode set to 100644
File size: 46.1 KB
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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" role="wrap">
9 <?dbhtml filename="util-linux.html"?>
10
11 <sect1info condition="script">
12 <productname>util-linux</productname>
13 <productnumber>&util-linux-version;</productnumber>
14 <address>&util-linux-url;</address>
15 </sect1info>
16
17 <title>Util-linux-&util-linux-version;</title>
18
19 <indexterm zone="ch-system-util-linux">
20 <primary sortas="a-Util-linux">Util-linux</primary>
21 </indexterm>
22
23 <sect2 role="package">
24 <title/>
25
26 <para>The Util-linux package contains miscellaneous utility programs.
27 Among them are utilities for handling file systems, consoles, partitions,
28 and messages.</para>
29
30 <segmentedlist>
31 <segtitle>&buildtime;</segtitle>
32 <segtitle>&diskspace;</segtitle>
33
34 <seglistitem>
35 <seg>&util-linux-ch6-sbu;</seg>
36 <seg>&util-linux-ch6-du;</seg>
37 </seglistitem>
38 </segmentedlist>
39
40 </sect2>
41
42 <sect2 role="installation">
43 <title>Installation of Util-linux</title>
44
45 <para>The FHS recommends using the <filename
46 class="directory">/var/lib/hwclock</filename> directory instead of the
47 usual <filename class="directory">/etc</filename> directory as the
48 location for the <filename>adjtime</filename> file. Create this directory
49 with:</para>
50
51<screen><userinput remap="pre">mkdir -pv /var/lib/hwclock</userinput></screen>
52
53 <para>Remove the earlier created symlinks and files:</para>
54
55<screen><userinput remap="pre">rm -vf /usr/include/{blkid,libfdisk,libmount,uuid}
56rm -vf /usr/lib/lib{blkid,fdisk,mount,uuid}.so*
57rm -vf /usr/lib/pkgconfig/{blkid,fdisk,mount,uuid}.pc</userinput></screen>
58
59 <para>Prepare Util-linux for compilation:</para>
60
61<screen revision="sysv"><userinput remap="configure">./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
62 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
63 --disable-chfn-chsh \
64 --disable-login \
65 --disable-nologin \
66 --disable-su \
67 --disable-setpriv \
68 --disable-runuser \
69 --disable-pylibmount \
70 --disable-static \
71 --without-python \
72 --without-systemd \
73 --without-systemdsystemunitdir</userinput></screen>
74
75<screen revision="systemd"><userinput remap="configure">./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
76 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
77 --disable-chfn-chsh \
78 --disable-login \
79 --disable-nologin \
80 --disable-su \
81 --disable-setpriv \
82 --disable-runuser \
83 --disable-pylibmount \
84 --disable-static \
85 --without-python</userinput></screen>
86
87 <para>The --disable and --without options prevent warnings about
88 building components that require packages not in LFS or are
89 inconsistent with programs installed by other packages.</para>
90
91 <para>Compile the package:</para>
92
93<screen><userinput remap="make">make</userinput></screen>
94
95 <para>If desired, run the test suite as a non-root user:</para>
96
97 <warning><para>Running the test suite as the root user can be harmful to
98 your system. To run it, the CONFIG_SCSI_DEBUG option for the kernel must
99 be available in the currently running system, and must be built as a
100 module. Building it into the kernel will prevent booting. For complete
101 coverage, other BLFS packages must be installed. If desired, this test can
102 be run after rebooting into the completed LFS system and running:</para>
103
104<screen role="nodump"><userinput>bash tests/run.sh --srcdir=$PWD --builddir=$PWD</userinput></screen>
105 </warning>
106
107<screen><userinput remap="test">chown -Rv tester .
108su tester -c "make -k check"</userinput></screen>
109
110 <para>Install the package:</para>
111
112<screen><userinput remap="install">make install</userinput></screen>
113
114 </sect2>
115
116 <sect2 id="contents-utillinux" role="content">
117 <title>Contents of Util-linux</title>
118
119 <segmentedlist>
120 <segtitle>Installed programs</segtitle>
121 <segtitle>Installed libraries</segtitle>
122 <segtitle>Installed directories</segtitle>
123
124 <seglistitem>
125 <seg>addpart, agetty, blkdiscard, blkid, blkzone, blockdev, cal, cfdisk, chcpu,
126 chmem, choom, chrt, col, colcrt, colrm, column, ctrlaltdel, delpart, dmesg,
127 eject, fallocate, fdformat, fdisk, fincore, findfs, findmnt, flock, fsck,
128 fsck.cramfs, fsck.minix, fsfreeze, fstrim, getopt, hexdump, hwclock,
129 i386, ionice, ipcmk, ipcrm, ipcs, isosize, kill, last, lastb (link to
130 last), ldattach, linux32, linux64, logger, look, losetup, lsblk, lscpu,
131 lsipc, lslocks, lslogins, lsmem, lsns, mcookie, mesg, mkfs, mkfs.bfs, mkfs.cramfs, mkfs.minix, mkswap,
132 more, mount, mountpoint, namei, nsenter, partx, pivot_root, prlimit, raw,
133 readprofile, rename, renice, resizepart, rev, rfkill, rtcwake, script,
134 scriptreplay, setarch, setsid, setterm, sfdisk, sulogin, swaplabel,
135 swapoff (link to swapon), swapon, switch_root, taskset, ul,
136 umount, uname26, unshare, utmpdump, uuidd, uuidgen, uuidparse, wall, wdctl, whereis,
137 wipefs, x86_64, and zramctl</seg>
138 <seg>libblkid.so, libfdisk.so, libmount.so,
139 libsmartcols.so, and libuuid.so</seg>
140 <seg>/usr/include/blkid,
141 /usr/include/libfdisk,
142 /usr/include/libmount,
143 /usr/include/libsmartcols,
144 /usr/include/uuid,
145 /usr/share/doc/util-linux-&util-linux-version;,
146 and /var/lib/hwclock</seg>
147 </seglistitem>
148 </segmentedlist>
149
150 <variablelist>
151 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
152 <?dbfo list-presentation="list"?>
153 <?dbhtml list-presentation="table"?>
154
155 <varlistentry id="addpart">
156 <term><command>addpart</command></term>
157 <listitem>
158 <para>Informs the Linux kernel of new partitions</para>
159 <indexterm zone="ch-system-util-linux addpart">
160 <primary sortas="b-addpart">addpart</primary>
161 </indexterm>
162 </listitem>
163 </varlistentry>
164
165 <varlistentry id="agetty">
166 <term><command>agetty</command></term>
167 <listitem>
168 <para>Opens a tty port, prompts for a login name,
169 and then invokes the <command>login</command> program</para>
170 <indexterm zone="ch-system-util-linux agetty">
171 <primary sortas="b-agetty">agetty</primary>
172 </indexterm>
173 </listitem>
174 </varlistentry>
175
176 <varlistentry id="blkdiscard">
177 <term><command>blkdiscard</command></term>
178 <listitem>
179 <para>Discards sectors on a device</para>
180 <indexterm zone="ch-system-util-linux blkdiscard">
181 <primary sortas="b-blkdiscard">blkdiscard</primary>
182 </indexterm>
183 </listitem>
184 </varlistentry>
185
186 <varlistentry id="blkid">
187 <term><command>blkid</command></term>
188 <listitem>
189 <para>A command line utility to locate and print block device
190 attributes</para>
191 <indexterm zone="ch-system-util-linux blkid">
192 <primary sortas="b-blkid">blkid</primary>
193 </indexterm>
194 </listitem>
195 </varlistentry>
196
197 <varlistentry id="blkzone">
198 <term><command>blkzone</command></term>
199 <listitem>
200 <para>Runs zone command on the given block device</para>
201 <indexterm zone="ch-system-util-linux blkzone">
202 <primary sortas="b-blkzone">blkzone</primary>
203 </indexterm>
204 </listitem>
205 </varlistentry>
206
207 <varlistentry id="blockdev">
208 <term><command>blockdev</command></term>
209 <listitem>
210 <para>Allows users to call block device ioctls from the command
211 line</para>
212 <indexterm zone="ch-system-util-linux blockdev">
213 <primary sortas="b-blockdev">blockdev</primary>
214 </indexterm>
215 </listitem>
216 </varlistentry>
217
218 <varlistentry id="cal">
219 <term><command>cal</command></term>
220 <listitem>
221 <para>Displays a simple calendar</para>
222 <indexterm zone="ch-system-util-linux cal">
223 <primary sortas="b-cal">cal</primary>
224 </indexterm>
225 </listitem>
226 </varlistentry>
227
228 <varlistentry id="cfdisk">
229 <term><command>cfdisk</command></term>
230 <listitem>
231 <para>Manipulates the partition table of the given device</para>
232 <indexterm zone="ch-system-util-linux cfdisk">
233 <primary sortas="b-cfdisk">cfdisk</primary>
234 </indexterm>
235 </listitem>
236 </varlistentry>
237
238 <varlistentry id="chcpu">
239 <term><command>chcpu</command></term>
240 <listitem>
241 <para>Modifies the state of CPUs</para>
242 <indexterm zone="ch-system-util-linux chcpu">
243 <primary sortas="b-chcpu">chcpu</primary>
244 </indexterm>
245 </listitem>
246 </varlistentry>
247
248 <varlistentry id="chmem">
249 <term><command>chmem</command></term>
250 <listitem>
251 <para>Configures memory</para>
252 <indexterm zone="ch-system-util-linux chmem">
253 <primary sortas="b-chmem">chmem</primary>
254 </indexterm>
255 </listitem>
256 </varlistentry>
257
258 <varlistentry id="choom">
259 <term><command>choom</command></term>
260 <listitem>
261 <para>Displays and adjusts OOM-killer score</para>
262 <indexterm zone="ch-system-util-linux choom">
263 <primary sortas="b-choom">choom</primary>
264 </indexterm>
265 </listitem>
266 </varlistentry>
267
268 <varlistentry id="chrt">
269 <term><command>chrt</command></term>
270 <listitem>
271 <para>Manipulates real-time attributes of a process</para>
272 <indexterm zone="ch-system-util-linux chrt">
273 <primary sortas="b-chrt">chrt</primary>
274 </indexterm>
275 </listitem>
276 </varlistentry>
277
278 <varlistentry id="col">
279 <term><command>col</command></term>
280 <listitem>
281 <para>Filters out reverse line feeds</para>
282 <indexterm zone="ch-system-util-linux col">
283 <primary sortas="b-col">col</primary>
284 </indexterm>
285 </listitem>
286 </varlistentry>
287
288 <varlistentry id="colcrt">
289 <term><command>colcrt</command></term>
290 <listitem>
291 <para>Filters <command>nroff</command> output for terminals
292 that lack some capabilities, such as overstriking and half-lines</para>
293 <indexterm zone="ch-system-util-linux colcrt">
294 <primary sortas="b-colcrt">colcrt</primary>
295 </indexterm>
296 </listitem>
297 </varlistentry>
298
299 <varlistentry id="colrm">
300 <term><command>colrm</command></term>
301 <listitem>
302 <para>Filters out the given columns</para>
303 <indexterm zone="ch-system-util-linux colrm">
304 <primary sortas="b-colrm">colrm</primary>
305 </indexterm>
306 </listitem>
307 </varlistentry>
308
309 <varlistentry id="column">
310 <term><command>column</command></term>
311 <listitem>
312 <para>Formats a given file into multiple columns</para>
313 <indexterm zone="ch-system-util-linux column">
314 <primary sortas="b-column">column</primary>
315 </indexterm>
316 </listitem>
317 </varlistentry>
318
319 <varlistentry id="ctrlaltdel">
320 <term><command>ctrlaltdel</command></term>
321 <listitem>
322 <para>Sets the function of the Ctrl+Alt+Del key combination to a
323 hard or a soft reset</para>
324 <indexterm zone="ch-system-util-linux ctrlaltdel">
325 <primary sortas="b-ctrlaltdel">ctrlaltdel</primary>
326 </indexterm>
327 </listitem>
328 </varlistentry>
329
330 <varlistentry id="delpart">
331 <term><command>delpart</command></term>
332 <listitem>
333 <para>Asks the Linux kernel to remove a partition</para>
334 <indexterm zone="ch-system-util-linux delpart">
335 <primary sortas="b-delpart">delpart</primary>
336 </indexterm>
337 </listitem>
338 </varlistentry>
339
340 <varlistentry id="dmesg">
341 <term><command>dmesg</command></term>
342 <listitem>
343 <para>Dumps the kernel boot messages</para>
344 <indexterm zone="ch-system-util-linux dmesg">
345 <primary sortas="b-dmesg">dmesg</primary>
346 </indexterm>
347 </listitem>
348 </varlistentry>
349
350 <varlistentry id="eject">
351 <term><command>eject</command></term>
352 <listitem>
353 <para>Ejects removable media</para>
354 <indexterm zone="ch-system-util-linux eject">
355 <primary sortas="b-eject">eject</primary>
356 </indexterm>
357 </listitem>
358 </varlistentry>
359
360 <varlistentry id="fallocate">
361 <term><command>fallocate</command></term>
362 <listitem>
363 <para>Preallocates space to a file</para>
364 <indexterm zone="ch-system-util-linux fallocate">
365 <primary sortas="b-fallocate">fallocate</primary>
366 </indexterm>
367 </listitem>
368 </varlistentry>
369
370 <varlistentry id="fdformat">
371 <term><command>fdformat</command></term>
372 <listitem>
373 <para>Low-level formats a floppy disk</para>
374 <indexterm zone="ch-system-util-linux fdformat">
375 <primary sortas="b-fdformat">fdformat</primary>
376 </indexterm>
377 </listitem>
378 </varlistentry>
379
380 <varlistentry id="fdisk">
381 <term><command>fdisk</command></term>
382 <listitem>
383 <para>Manipulates the partition table of the given device</para>
384 <indexterm zone="ch-system-util-linux fdisk">
385 <primary sortas="b-fdisk">fdisk</primary>
386 </indexterm>
387 </listitem>
388 </varlistentry>
389
390 <varlistentry id="fincore">
391 <term><command>fincore</command></term>
392 <listitem>
393 <para>Counts pages of file contents in core</para>
394 <indexterm zone="ch-system-util-linux fincore">
395 <primary sortas="b-fincore">fincore</primary>
396 </indexterm>
397 </listitem>
398 </varlistentry>
399
400 <varlistentry id="findfs">
401 <term><command>findfs</command></term>
402 <listitem>
403 <para>Finds a file system by label or Universally Unique Identifier
404 (UUID)</para>
405 <indexterm zone="ch-system-util-linux findfs">
406 <primary sortas="b-findfs">findfs</primary>
407 </indexterm>
408 </listitem>
409 </varlistentry>
410
411 <varlistentry id="findmnt">
412 <term><command>findmnt</command></term>
413 <listitem>
414 <para>Is a command line interface to the libmount library
415 for work with mountinfo, fstab and mtab files</para>
416 <indexterm zone="ch-system-util-linux findmnt">
417 <primary sortas="b-findmnt">findmnt</primary>
418 </indexterm>
419 </listitem>
420 </varlistentry>
421
422 <varlistentry id="flock">
423 <term><command>flock</command></term>
424 <listitem>
425 <para>Acquires a file lock and then executes a command with the lock
426 held</para>
427 <indexterm zone="ch-system-util-linux flock">
428 <primary sortas="b-flock">flock</primary>
429 </indexterm>
430 </listitem>
431 </varlistentry>
432
433 <varlistentry id="fsck">
434 <term><command>fsck</command></term>
435 <listitem>
436 <para>Is used to check, and optionally repair, file systems</para>
437 <indexterm zone="ch-system-util-linux fsck">
438 <primary sortas="b-fsck">fsck</primary>
439 </indexterm>
440 </listitem>
441 </varlistentry>
442
443 <varlistentry id="fsck.cramfs">
444 <term><command>fsck.cramfs</command></term>
445 <listitem>
446 <para>Performs a consistency check on the Cramfs file system on the
447 given device</para>
448 <indexterm zone="ch-system-util-linux fsck.cramfs">
449 <primary sortas="b-fsck.cramfs">fsck.cramfs</primary>
450 </indexterm>
451 </listitem>
452 </varlistentry>
453
454 <varlistentry id="fsck.minix">
455 <term><command>fsck.minix</command></term>
456 <listitem>
457 <para>Performs a consistency check on the Minix file system on the
458 given device</para>
459 <indexterm zone="ch-system-util-linux fsck.minix">
460 <primary sortas="b-fsck.minix">fsck.minix</primary>
461 </indexterm>
462 </listitem>
463 </varlistentry>
464
465 <varlistentry id="fsfreeze">
466 <term><command>fsfreeze</command></term>
467 <listitem>
468 <para>Is a very simple wrapper around FIFREEZE/FITHAW ioctl
469 kernel driver operations</para>
470 <indexterm zone="ch-system-util-linux fsfreeze">
471 <primary sortas="b-fsfreeze">fsfreeze</primary>
472 </indexterm>
473 </listitem>
474 </varlistentry>
475
476 <varlistentry id="fstrim">
477 <term><command>fstrim</command></term>
478 <listitem>
479 <para>Discards unused blocks on a mounted filesystem</para>
480 <indexterm zone="ch-system-util-linux fstrim">
481 <primary sortas="b-fstrim">fstrim</primary>
482 </indexterm>
483 </listitem>
484 </varlistentry>
485
486 <varlistentry id="getopt">
487 <term><command>getopt</command></term>
488 <listitem>
489 <para>Parses options in the given command line</para>
490 <indexterm zone="ch-system-util-linux getopt">
491 <primary sortas="b-getopt">getopt</primary>
492 </indexterm>
493 </listitem>
494 </varlistentry>
495
496 <varlistentry id="hexdump">
497 <term><command>hexdump</command></term>
498 <listitem>
499 <para>Dumps the given file in hexadecimal or in another given
500 format</para>
501 <indexterm zone="ch-system-util-linux hexdump">
502 <primary sortas="b-hexdump">hexdump</primary>
503 </indexterm>
504 </listitem>
505 </varlistentry>
506
507 <varlistentry id="hwclock">
508 <term><command>hwclock</command></term>
509 <listitem>
510 <para>Reads or sets the system's hardware clock, also called
511 the Real-Time Clock (RTC) or Basic Input-Output System (BIOS)
512 clock</para>
513 <indexterm zone="ch-system-util-linux hwclock">
514 <primary sortas="b-hwclock">hwclock</primary>
515 </indexterm>
516 </listitem>
517 </varlistentry>
518
519 <varlistentry id="i386">
520 <term><command>i386</command></term>
521 <listitem>
522 <para>A symbolic link to setarch</para>
523 <indexterm zone="ch-system-util-linux i386">
524 <primary sortas="b-i386">i386</primary>
525 </indexterm>
526 </listitem>
527 </varlistentry>
528
529 <varlistentry id="ionice">
530 <term><command>ionice</command></term>
531 <listitem>
532 <para>Gets or sets the io scheduling class and priority for a program</para>
533 <indexterm zone="ch-system-util-linux ionice">
534 <primary sortas="b-ionice">ionice</primary>
535 </indexterm>
536 </listitem>
537 </varlistentry>
538
539 <varlistentry id="ipcmk">
540 <term><command>ipcmk</command></term>
541 <listitem>
542 <para>Creates various IPC resources</para>
543 <indexterm zone="ch-system-util-linux ipcmk">
544 <primary sortas="b-ipcmk">ipcmk</primary>
545 </indexterm>
546 </listitem>
547 </varlistentry>
548
549 <varlistentry id="ipcrm">
550 <term><command>ipcrm</command></term>
551 <listitem>
552 <para>Removes the given Inter-Process Communication (IPC) resource</para>
553 <indexterm zone="ch-system-util-linux ipcrm">
554 <primary sortas="b-ipcrm">ipcrm</primary>
555 </indexterm>
556 </listitem>
557 </varlistentry>
558
559 <varlistentry id="ipcs">
560 <term><command>ipcs</command></term>
561 <listitem>
562 <para>Provides IPC status information</para>
563 <indexterm zone="ch-system-util-linux ipcs">
564 <primary sortas="b-ipcs">ipcs</primary>
565 </indexterm>
566 </listitem>
567 </varlistentry>
568
569 <varlistentry id="isosize">
570 <term><command>isosize</command></term>
571 <listitem>
572 <para>Reports the size of an iso9660 file system</para>
573 <indexterm zone="ch-system-util-linux isosize">
574 <primary sortas="b-isosize">isosize</primary>
575 </indexterm>
576 </listitem>
577 </varlistentry>
578
579 <varlistentry id="kill">
580 <term><command>kill</command></term>
581 <listitem>
582 <para>Sends signals to processes</para>
583 <indexterm zone="ch-system-util-linux kill">
584 <primary sortas="b-kill">kill</primary>
585 </indexterm>
586 </listitem>
587 </varlistentry>
588
589 <varlistentry id="last">
590 <term><command>last</command></term>
591 <listitem>
592 <para>Shows which users last logged in (and out), searching back
593 through the <filename>/var/log/wtmp</filename> file; it also shows
594 system boots, shutdowns, and run-level changes</para>
595 <indexterm zone="ch-system-util-linux last">
596 <primary sortas="b-last">last</primary>
597 </indexterm>
598 </listitem>
599 </varlistentry>
600
601 <varlistentry id="lastb">
602 <term><command>lastb</command></term>
603 <listitem>
604 <para>Shows the failed login attempts, as logged in
605 <filename>/var/log/btmp</filename></para>
606 <indexterm zone="ch-system-util-linux lastb">
607 <primary sortas="b-lastb">lastb</primary>
608 </indexterm>
609 </listitem>
610 </varlistentry>
611
612 <varlistentry id="ldattach">
613 <term><command>ldattach</command></term>
614 <listitem>
615 <para>Attaches a line discipline to a serial line</para>
616 <indexterm zone="ch-system-util-linux ldattach">
617 <primary sortas="b-ldattach">ldattach</primary>
618 </indexterm>
619 </listitem>
620 </varlistentry>
621
622 <varlistentry id="linux32">
623 <term><command>linux32</command></term>
624 <listitem>
625 <para>A symbolic link to setarch</para>
626 <indexterm zone="ch-system-util-linux linux32">
627 <primary sortas="b-linux32">linux32</primary>
628 </indexterm>
629 </listitem>
630 </varlistentry>
631
632 <varlistentry id="linux64">
633 <term><command>linux64</command></term>
634 <listitem>
635 <para>A symbolic link to setarch</para>
636 <indexterm zone="ch-system-util-linux linux64">
637 <primary sortas="b-linux64">linux64</primary>
638 </indexterm>
639 </listitem>
640 </varlistentry>
641
642 <varlistentry id="logger">
643 <term><command>logger</command></term>
644 <listitem>
645 <para>Enters the given message into the system log</para>
646 <indexterm zone="ch-system-util-linux logger">
647 <primary sortas="b-logger">logger</primary>
648 </indexterm>
649 </listitem>
650 </varlistentry>
651
652 <varlistentry id="look">
653 <term><command>look</command></term>
654 <listitem>
655 <para>Displays lines that begin with the given string</para>
656 <indexterm zone="ch-system-util-linux look">
657 <primary sortas="b-look">look</primary>
658 </indexterm>
659 </listitem>
660 </varlistentry>
661
662 <varlistentry id="losetup">
663 <term><command>losetup</command></term>
664 <listitem>
665 <para>Sets up and controls loop devices</para>
666 <indexterm zone="ch-system-util-linux losetup">
667 <primary sortas="b-losetup">losetup</primary>
668 </indexterm>
669 </listitem>
670 </varlistentry>
671
672 <varlistentry id="lsblk">
673 <term><command>lsblk</command></term>
674 <listitem>
675 <para>Lists information about all or selected block devices in
676 a tree-like format</para>
677 <indexterm zone="ch-system-util-linux lsblk">
678 <primary sortas="b-lsblk">lsblk</primary>
679 </indexterm>
680 </listitem>
681 </varlistentry>
682
683 <varlistentry id="lscpu">
684 <term><command>lscpu</command></term>
685 <listitem>
686 <para>Prints CPU architecture information</para>
687 <indexterm zone="ch-system-util-linux lscpu">
688 <primary sortas="b-lscpu">lscpu</primary>
689 </indexterm>
690 </listitem>
691 </varlistentry>
692
693 <varlistentry id="lsipc">
694 <term><command>lsipc</command></term>
695 <listitem>
696 <para>Prints information on IPC facilities currently employed
697 in the system</para>
698 <indexterm zone="ch-system-util-linux lsipc">
699 <primary sortas="b-lsipc">lsipc</primary>
700 </indexterm>
701 </listitem>
702 </varlistentry>
703
704 <varlistentry id="lslocks">
705 <term><command>lslocks</command></term>
706 <listitem>
707 <para>Lists local system locks</para>
708 <indexterm zone="ch-system-util-linux lslocks">
709 <primary sortas="b-lslocks">lslocks</primary>
710 </indexterm>
711 </listitem>
712 </varlistentry>
713
714 <varlistentry id="lslogins">
715 <term><command>lslogins</command></term>
716 <listitem>
717 <para>Lists information about users, groups and system accounts</para>
718 <indexterm zone="ch-system-util-linux lslogins">
719 <primary sortas="b-lslogins">lslogins</primary>
720 </indexterm>
721 </listitem>
722 </varlistentry>
723
724 <varlistentry id="lsmem">
725 <term><command>lsmem</command></term>
726 <listitem>
727 <para>Lists the ranges of available memory with their online
728 status</para>
729 <indexterm zone="ch-system-util-linux lsmem">
730 <primary sortas="b-lsmem">lsmem</primary>
731 </indexterm>
732 </listitem>
733 </varlistentry>
734
735 <varlistentry id="lsns">
736 <term><command>lsns</command></term>
737 <listitem>
738 <para>Lists namespaces</para>
739 <indexterm zone="ch-system-util-linux lsns">
740 <primary sortas="b-lsns">lsns</primary>
741 </indexterm>
742 </listitem>
743 </varlistentry>
744
745 <varlistentry id="mcookie">
746 <term><command>mcookie</command></term>
747 <listitem>
748 <para>Generates magic cookies (128-bit random hexadecimal numbers) for
749 <command>xauth</command></para>
750 <indexterm zone="ch-system-util-linux mcookie">
751 <primary sortas="b-mcookie">mcookie</primary>
752 </indexterm>
753 </listitem>
754 </varlistentry>
755
756 <varlistentry id="mesg">
757 <term><command>mesg</command></term>
758 <listitem>
759 <para>Controls whether other users can send messages to the current
760 user's terminal</para>
761 <indexterm zone="ch-system-util-linux mesg">
762 <primary sortas="b-mesg">mesg</primary>
763 </indexterm>
764 </listitem>
765 </varlistentry>
766
767 <varlistentry id="mkfs">
768 <term><command>mkfs</command></term>
769 <listitem>
770 <para>Builds a file system on a device (usually a hard disk
771 partition)</para>
772 <indexterm zone="ch-system-util-linux mkfs">
773 <primary sortas="b-mkfs">mkfs</primary>
774 </indexterm>
775 </listitem>
776 </varlistentry>
777
778 <varlistentry id="mkfs.bfs">
779 <term><command>mkfs.bfs</command></term>
780 <listitem>
781 <para>Creates a Santa Cruz Operations (SCO) bfs file system</para>
782 <indexterm zone="ch-system-util-linux mkfs.bfs">
783 <primary sortas="b-mkfs.bfs">mkfs.bfs</primary>
784 </indexterm>
785 </listitem>
786 </varlistentry>
787
788 <varlistentry id="mkfs.cramfs">
789 <term><command>mkfs.cramfs</command></term>
790 <listitem>
791 <para>Creates a cramfs file system</para>
792 <indexterm zone="ch-system-util-linux mkfs.cramfs">
793 <primary sortas="b-mkfs.cramfs">mkfs.cramfs</primary>
794 </indexterm>
795 </listitem>
796 </varlistentry>
797
798 <varlistentry id="mkfs.minix">
799 <term><command>mkfs.minix</command></term>
800 <listitem>
801 <para>Creates a Minix file system</para>
802 <indexterm zone="ch-system-util-linux mkfs.minix">
803 <primary sortas="b-mkfs.minix">mkfs.minix</primary>
804 </indexterm>
805 </listitem>
806 </varlistentry>
807
808 <varlistentry id="mkswap">
809 <term><command>mkswap</command></term>
810 <listitem>
811 <para>Initializes the given device or file to be used as a swap
812 area</para>
813 <indexterm zone="ch-system-util-linux mkswap">
814 <primary sortas="b-mkswap">mkswap</primary>
815 </indexterm>
816 </listitem>
817 </varlistentry>
818
819 <varlistentry id="more">
820 <term><command>more</command></term>
821 <listitem>
822 <para>A filter for paging through text one screen at a time</para>
823 <indexterm zone="ch-system-util-linux more">
824 <primary sortas="b-more">more</primary>
825 </indexterm>
826 </listitem>
827 </varlistentry>
828
829 <varlistentry id="mount">
830 <term><command>mount</command></term>
831 <listitem>
832 <para>Attaches the file system on the given device to a specified
833 directory in the file-system tree</para>
834 <indexterm zone="ch-system-util-linux mount">
835 <primary sortas="b-mount">mount</primary>
836 </indexterm>
837 </listitem>
838 </varlistentry>
839
840 <varlistentry id="mountpoint">
841 <term><command>mountpoint</command></term>
842 <listitem>
843 <para>Checks if the directory is a mountpoint</para>
844 <indexterm zone="ch-system-util-linux mountpoint">
845 <primary sortas="b-mountpoint">mountpoint</primary>
846 </indexterm>
847 </listitem>
848 </varlistentry>
849
850 <varlistentry id="namei">
851 <term><command>namei</command></term>
852 <listitem>
853 <para>Shows the symbolic links in the given pathnames</para>
854 <indexterm zone="ch-system-util-linux namei">
855 <primary sortas="b-namei">namei</primary>
856 </indexterm>
857 </listitem>
858 </varlistentry>
859
860 <varlistentry id="nsenter">
861 <term><command>nsenter</command></term>
862 <listitem>
863 <para>Runs a program with namespaces of other processes</para>
864 <indexterm zone="ch-system-util-linux nsenter">
865 <primary sortas="b-nsenter">nsenter</primary>
866 </indexterm>
867 </listitem>
868 </varlistentry>
869
870 <varlistentry id="partx">
871 <term><command>partx</command></term>
872 <listitem>
873 <para>Tells the kernel about the presence and numbering of on-disk
874 partitions</para>
875 <indexterm zone="ch-system-util-linux partx">
876 <primary sortas="b-partx">partx</primary>
877 </indexterm>
878 </listitem>
879 </varlistentry>
880
881 <varlistentry id="pivot_root">
882 <term><command>pivot_root</command></term>
883 <listitem>
884 <para>Makes the given file system the new root file system of the
885 current process</para>
886 <indexterm zone="ch-system-util-linux pivot_root">
887 <primary sortas="b-pivot_root">pivot_root</primary>
888 </indexterm>
889 </listitem>
890 </varlistentry>
891
892 <varlistentry id="prlimit">
893 <term><command>prlimit</command></term>
894 <listitem>
895 <para>Get and set a process' resource limits</para>
896 <indexterm zone="ch-system-util-linux prlimit">
897 <primary sortas="b-prlimit">prlimit</primary>
898 </indexterm>
899 </listitem>
900 </varlistentry>
901
902 <varlistentry id="raw">
903 <term><command>raw</command></term>
904 <listitem>
905 <para>Bind a Linux raw character device to a block device</para>
906 <indexterm zone="ch-system-util-linux raw">
907 <primary sortas="b-raw">raw</primary>
908 </indexterm>
909 </listitem>
910 </varlistentry>
911
912 <varlistentry id="readprofile">
913 <term><command>readprofile</command></term>
914 <listitem>
915 <para>Reads kernel profiling information</para>
916 <indexterm zone="ch-system-util-linux readprofile">
917 <primary sortas="b-readprofile">readprofile</primary>
918 </indexterm>
919 </listitem>
920 </varlistentry>
921
922 <varlistentry id="rename">
923 <term><command>rename</command></term>
924 <listitem>
925 <para>Renames the given files, replacing a given string with
926 another</para>
927 <indexterm zone="ch-system-util-linux rename">
928 <primary sortas="b-rename">rename</primary>
929 </indexterm>
930 </listitem>
931 </varlistentry>
932
933 <varlistentry id="renice">
934 <term><command>renice</command></term>
935 <listitem>
936 <para>Alters the priority of running processes</para>
937 <indexterm zone="ch-system-util-linux renice">
938 <primary sortas="b-renice">renice</primary>
939 </indexterm>
940 </listitem>
941 </varlistentry>
942
943 <varlistentry id="resizepart">
944 <term><command>resizepart</command></term>
945 <listitem>
946 <para>Asks the Linux kernel to resize a partition</para>
947 <indexterm zone="ch-system-util-linux resizepart">
948 <primary sortas="b-resizepart">resizepart</primary>
949 </indexterm>
950 </listitem>
951 </varlistentry>
952
953 <varlistentry id="rev">
954 <term><command>rev</command></term>
955 <listitem>
956 <para>Reverses the lines of a given file</para>
957 <indexterm zone="ch-system-util-linux rev">
958 <primary sortas="b-rev">rev</primary>
959 </indexterm>
960 </listitem>
961 </varlistentry>
962
963 <varlistentry id="rkfill">
964 <term><command>rkfill</command></term>
965 <listitem>
966 <para>Tool for enabling and disabling wireless devices</para>
967 <indexterm zone="ch-system-util-linux rkfill">
968 <primary sortas="b-rkfill">rkfill</primary>
969 </indexterm>
970 </listitem>
971 </varlistentry>
972
973 <varlistentry id="rtcwake">
974 <term><command>rtcwake</command></term>
975 <listitem>
976 <para>Used to enter a system sleep state until specified wakeup
977 time</para>
978 <indexterm zone="ch-system-util-linux rtcwake">
979 <primary sortas="b-rtcwake">rtcwake</primary>
980 </indexterm>
981 </listitem>
982 </varlistentry>
983
984 <varlistentry id="script">
985 <term><command>script</command></term>
986 <listitem>
987 <para>Makes a typescript of a terminal session</para>
988 <indexterm zone="ch-system-util-linux script">
989 <primary sortas="b-script">script</primary>
990 </indexterm>
991 </listitem>
992 </varlistentry>
993
994 <varlistentry id="scriptreplay">
995 <term><command>scriptreplay</command></term>
996 <listitem>
997 <para>Plays back typescripts using timing information</para>
998 <indexterm zone="ch-system-util-linux scriptreplay">
999 <primary sortas="b-scriptreplay">scriptreplay</primary>
1000 </indexterm>
1001 </listitem>
1002 </varlistentry>
1003
1004 <varlistentry id="setarch">
1005 <term><command>setarch</command></term>
1006 <listitem>
1007 <para>Changes reported architecture in a new program environment and
1008 sets personality flags</para>
1009 <indexterm zone="ch-system-util-linux setarch">
1010 <primary sortas="b-setarch">setarch</primary>
1011 </indexterm>
1012 </listitem>
1013 </varlistentry>
1014
1015 <varlistentry id="setsid">
1016 <term><command>setsid</command></term>
1017 <listitem>
1018 <para>Runs the given program in a new session</para>
1019 <indexterm zone="ch-system-util-linux setsid">
1020 <primary sortas="b-setsid">setsid</primary>
1021 </indexterm>
1022 </listitem>
1023 </varlistentry>
1024
1025 <varlistentry id="setterm">
1026 <term><command>setterm</command></term>
1027 <listitem>
1028 <para>Sets terminal attributes</para>
1029 <indexterm zone="ch-system-util-linux setterm">
1030 <primary sortas="b-setterm">setterm</primary>
1031 </indexterm>
1032 </listitem>
1033 </varlistentry>
1034
1035 <varlistentry id="sfdisk">
1036 <term><command>sfdisk</command></term>
1037 <listitem>
1038 <para>A disk partition table manipulator</para>
1039 <indexterm zone="ch-system-util-linux sfdisk">
1040 <primary sortas="b-sfdisk">sfdisk</primary>
1041 </indexterm>
1042 </listitem>
1043 </varlistentry>
1044
1045 <varlistentry id="sulogin">
1046 <term><command>sulogin</command></term>
1047 <listitem>
1048 <para>Allows <systemitem class="username">root</systemitem> to log in;
1049 it is normally invoked by <command>init</command> when the system goes
1050 into single user mode</para>
1051 <indexterm zone="ch-system-util-linux sulogin">
1052 <primary sortas="b-sulogin">sulogin</primary>
1053 </indexterm>
1054 </listitem>
1055 </varlistentry>
1056
1057 <varlistentry id="swaplabel">
1058 <term><command>swaplabel</command></term>
1059 <listitem>
1060 <para>Allows to change swaparea UUID and label</para>
1061 <indexterm zone="ch-system-util-linux swaplabel">
1062 <primary sortas="b-swaplabel">swaplabel</primary>
1063 </indexterm>
1064 </listitem>
1065 </varlistentry>
1066
1067 <varlistentry id="swapoff">
1068 <term><command>swapoff</command></term>
1069 <listitem>
1070 <para>Disables devices and files for paging and swapping</para>
1071 <indexterm zone="ch-system-util-linux swapoff">
1072 <primary sortas="b-swapoff">swapoff</primary>
1073 </indexterm>
1074 </listitem>
1075 </varlistentry>
1076
1077 <varlistentry id="swapon">
1078 <term><command>swapon</command></term>
1079 <listitem>
1080 <para>Enables devices and files for paging and swapping and
1081 lists the devices and files currently in use</para>
1082 <indexterm zone="ch-system-util-linux swapon">
1083 <primary sortas="b-swapon">swapon</primary>
1084 </indexterm>
1085 </listitem>
1086 </varlistentry>
1087
1088 <varlistentry id="switch_root">
1089 <term><command>switch_root</command></term>
1090 <listitem>
1091 <para>Switches to another filesystem as the root of the mount tree</para>
1092 <indexterm zone="ch-system-util-linux switch_root">
1093 <primary sortas="b-switch_root">switch_root</primary>
1094 </indexterm>
1095 </listitem>
1096 </varlistentry>
1097
1098 <varlistentry id="tailf">
1099 <term><command>tailf</command></term>
1100 <listitem>
1101 <para>Tracks the growth of a log file; displays the last 10 lines
1102 of a log file, then continues displaying any new entries in the
1103 log file as they are created</para>
1104 <indexterm zone="ch-system-util-linux tailf">
1105 <primary sortas="b-tailf">tailf</primary>
1106 </indexterm>
1107 </listitem>
1108 </varlistentry>
1109
1110 <varlistentry id="taskset">
1111 <term><command>taskset</command></term>
1112 <listitem>
1113 <para>Retrieves or sets a process' CPU affinity</para>
1114 <indexterm zone="ch-system-util-linux taskset">
1115 <primary sortas="b-taskset">taskset</primary>
1116 </indexterm>
1117 </listitem>
1118 </varlistentry>
1119
1120 <varlistentry id="ul">
1121 <term><command>ul</command></term>
1122 <listitem>
1123 <para>A filter for translating underscores into escape sequences
1124 indicating underlining for the terminal in use</para>
1125 <indexterm zone="ch-system-util-linux ul">
1126 <primary sortas="b-ul">ul</primary>
1127 </indexterm>
1128 </listitem>
1129 </varlistentry>
1130
1131 <varlistentry id="umount">
1132 <term><command>umount</command></term>
1133 <listitem>
1134 <para>Disconnects a file system from the system's file tree</para>
1135 <indexterm zone="ch-system-util-linux umount">
1136 <primary sortas="b-umount">umount</primary>
1137 </indexterm>
1138 </listitem>
1139 </varlistentry>
1140
1141 <varlistentry id="uname26">
1142 <term><command>uname26</command></term>
1143 <listitem>
1144 <para>A symbolic link to setarch</para>
1145 <indexterm zone="ch-system-util-linux uname26">
1146 <primary sortas="b-uname26">uname26</primary>
1147 </indexterm>
1148 </listitem>
1149 </varlistentry>
1150
1151 <varlistentry id="unshare">
1152 <term><command>unshare</command></term>
1153 <listitem>
1154 <para>Runs a program with some namespaces unshared from parent</para>
1155 <indexterm zone="ch-system-util-linux unshare">
1156 <primary sortas="b-unshare">unshare</primary>
1157 </indexterm>
1158 </listitem>
1159 </varlistentry>
1160
1161 <varlistentry id="utmpdump">
1162 <term><command>utmpdump</command></term>
1163 <listitem>
1164 <para>Displays the content of the given login file in a more
1165 user-friendly format</para>
1166 <indexterm zone="ch-system-util-linux utmpdump">
1167 <primary sortas="b-utmpdump">utmpdump</primary>
1168 </indexterm>
1169 </listitem>
1170 </varlistentry>
1171
1172 <varlistentry id="uuidd">
1173 <term><command>uuidd</command></term>
1174 <listitem>
1175 <para>A daemon used by the UUID library to generate time-based
1176 UUIDs in a secure and guaranteed-unique fashion</para>
1177 <indexterm zone="ch-system-util-linux uuidd">
1178 <primary sortas="b-uuidd">uuidd</primary>
1179 </indexterm>
1180 </listitem>
1181 </varlistentry>
1182
1183 <varlistentry id="uuidgen">
1184 <term><command>uuidgen</command></term>
1185 <listitem>
1186 <para>Creates new UUIDs. Each new UUID can reasonably be considered
1187 unique among all UUIDs created, on the local system and on other
1188 systems, in the past and in the future</para>
1189 <indexterm zone="ch-system-util-linux uuidgen">
1190 <primary sortas="b-uuidgen">uuidgen</primary>
1191 </indexterm>
1192 </listitem>
1193 </varlistentry>
1194
1195 <varlistentry id="uuidparse">
1196 <term><command>uuidparse</command></term>
1197 <listitem>
1198 <para>An utility to parse unique identifiers</para>
1199 <indexterm zone="ch-system-util-linux uuidparse">
1200 <primary sortas="b-uuidparse">uuidparse</primary>
1201 </indexterm>
1202 </listitem>
1203 </varlistentry>
1204
1205 <varlistentry id="wall">
1206 <term><command>wall</command></term>
1207 <listitem>
1208 <para>Displays the contents of a file or, by default, its standard
1209 input, on the terminals of all currently logged in users</para>
1210 <indexterm zone="ch-system-util-linux wall">
1211 <primary sortas="b-wall">wall</primary>
1212 </indexterm>
1213 </listitem>
1214 </varlistentry>
1215
1216 <varlistentry id="wdctl">
1217 <term><command>wdctl</command></term>
1218 <listitem>
1219 <para>Shows hardware watchdog status</para>
1220 <indexterm zone="ch-system-util-linux wdctl">
1221 <primary sortas="b-wdctl">wdctl</primary>
1222 </indexterm>
1223 </listitem>
1224 </varlistentry>
1225
1226 <varlistentry id="whereis">
1227 <term><command>whereis</command></term>
1228 <listitem>
1229 <para>Reports the location of the binary, source, and man page
1230 for the given command</para>
1231 <indexterm zone="ch-system-util-linux whereis">
1232 <primary sortas="b-whereis">whereis</primary>
1233 </indexterm>
1234 </listitem>
1235 </varlistentry>
1236
1237 <varlistentry id="wipefs">
1238 <term><command>wipefs</command></term>
1239 <listitem>
1240 <para>Wipes a filesystem signature from a device</para>
1241 <indexterm zone="ch-system-util-linux wipefs">
1242 <primary sortas="b-wipefs">wipefs</primary>
1243 </indexterm>
1244 </listitem>
1245 </varlistentry>
1246
1247 <varlistentry id="x86_64">
1248 <term><command>x86_64</command></term>
1249 <listitem>
1250 <para>A symbolic link to setarch</para>
1251 <indexterm zone="ch-system-util-linux x86_64">
1252 <primary sortas="b-x86_64">x86_64</primary>
1253 </indexterm>
1254 </listitem>
1255 </varlistentry>
1256
1257 <varlistentry id="zramctl">
1258 <term><command>zramctl</command></term>
1259 <listitem>
1260 <para>A program to set up and control zram (compressed ram disk)
1261 devices</para>
1262 <indexterm zone="ch-system-util-linux zramctl">
1263 <primary sortas="b-zramctl">zramctl</primary>
1264 </indexterm>
1265 </listitem>
1266 </varlistentry>
1267
1268 <varlistentry id="libblkid">
1269 <term><filename class="libraryfile">libblkid</filename></term>
1270 <listitem>
1271 <para>Contains routines for device identification and token
1272 extraction</para>
1273 <indexterm zone="ch-system-util-linux libblkid">
1274 <primary sortas="c-libblkid">libblkid</primary>
1275 </indexterm>
1276 </listitem>
1277 </varlistentry>
1278
1279 <varlistentry id="libfdisk">
1280 <term><filename class="libraryfile">libfdisk</filename></term>
1281 <listitem>
1282 <para>Contains routines for manipulating partition tables</para>
1283 <indexterm zone="ch-system-util-linux libfdisk">
1284 <primary sortas="c-libfdisk">libfdisk</primary>
1285 </indexterm>
1286 </listitem>
1287 </varlistentry>
1288
1289 <varlistentry id="libmount">
1290 <term><filename class="libraryfile">libmount</filename></term>
1291 <listitem>
1292 <para>Contains routines for block device mounting and
1293 unmounting</para>
1294 <indexterm zone="ch-system-util-linux libmount">
1295 <primary sortas="c-libmount">libmount</primary>
1296 </indexterm>
1297 </listitem>
1298 </varlistentry>
1299
1300 <varlistentry id="libsmartcols">
1301 <term><filename class="libraryfile">libsmartcols</filename></term>
1302 <listitem>
1303 <para>Contains routines for aiding screen output in tabular form</para>
1304 <indexterm zone="ch-system-util-linux libsmartcols">
1305 <primary sortas="c-libsmartcols">libsmartcols</primary>
1306 </indexterm>
1307 </listitem>
1308 </varlistentry>
1309
1310 <varlistentry id="libuuid">
1311 <term><filename class="libraryfile">libuuid</filename></term>
1312 <listitem>
1313 <para>Contains routines for generating unique identifiers for objects
1314 that may be accessible beyond the local system</para>
1315 <indexterm zone="ch-system-util-linux libuuid">
1316 <primary sortas="c-libuuid">libuuid</primary>
1317 </indexterm>
1318 </listitem>
1319 </varlistentry>
1320
1321 </variablelist>
1322
1323 </sect2>
1324
1325</sect1>
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