source: chapter06/util-linux.xml@ ae7f075

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Update to trunk r11877

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