source: chapter08/util-linux.xml@ 67ecb26

xry111/loongarch xry111/loongarch-12.2
Last change on this file since 67ecb26 was 67ecb26, checked in by Xi Ruoyao <xry111@…>, 6 months ago

loongarch: Remove reference to SSSE3

Obviously LoongArch does not have SSSE3.

  • Property mode set to 100644
File size: 47.7 KB
Line 
1<?xml version="1.0" encoding="UTF-8"?>
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-fin-sbu;</seg>
36 <seg>&util-linux-fin-du;</seg>
37 </seglistitem>
38 </segmentedlist>
39
40 </sect2>
41
42 <sect2 role="installation">
43 <title>Installation of Util-linux</title>
44
45<!--
46 <para>First, disable a problematic test:</para>
47
48 <screen><userinput remap="pre">sed -i '/test_mkfds/s/^/#/' tests/helpers/Makemodule.am</userinput></screen>
49-->
50 <para>Prepare Util-linux for compilation:</para>
51
52 <screen revision="sysv"><userinput remap="configure">./configure --bindir=/usr/bin \
53 --libdir=/usr/lib \
54 --runstatedir=/run \
55 --sbindir=/usr/sbin \
56 --disable-chfn-chsh \
57 --disable-login \
58 --disable-nologin \
59 --disable-su \
60 --disable-setpriv \
61 --disable-runuser \
62 --disable-pylibmount \
63 --disable-liblastlog2 \
64 --disable-static \
65 --without-python \
66 --without-systemd \
67 --without-systemdsystemunitdir \
68 ADJTIME_PATH=/var/lib/hwclock/adjtime \
69 --docdir=/usr/share/doc/util-linux-&util-linux-version;</userinput></screen>
70
71 <screen revision="systemd"><userinput remap="configure">./configure --bindir=/usr/bin \
72 --libdir=/usr/lib \
73 --runstatedir=/run \
74 --sbindir=/usr/sbin \
75 --disable-chfn-chsh \
76 --disable-login \
77 --disable-nologin \
78 --disable-su \
79 --disable-setpriv \
80 --disable-runuser \
81 --disable-pylibmount \
82 --disable-liblastlog2 \
83 --disable-static \
84 --without-python \
85 ADJTIME_PATH=/var/lib/hwclock/adjtime \
86 --docdir=/usr/share/doc/util-linux-&util-linux-version;</userinput></screen>
87
88 <para>The --disable and --without options prevent warnings about
89 building components that either require packages not in LFS, or are
90 inconsistent with programs installed by other packages.</para>
91
92 <para>Compile the package:</para>
93
94<screen><userinput remap="make">make</userinput></screen>
95
96 <para>If desired, run the test suite as a non-&root; user:</para>
97
98 <warning><para>Running the test suite as the
99 <systemitem class="username">root</systemitem> user can be harmful to
100 your system. To run it, the CONFIG_SCSI_DEBUG option for the kernel must
101 be available in the currently running system and must be built as a
102 module. Building it into the kernel will prevent booting. For complete
103 coverage, other BLFS packages must be installed. If desired, this test can
104 be run by booting into the completed LFS system and running:</para>
105
106<screen role="nodump"><userinput>bash tests/run.sh --srcdir=$PWD --builddir=$PWD</userinput></screen>
107 </warning>
108
109<screen><userinput remap="test">chown -R tester .
110su tester -c "make -k check"</userinput></screen>
111
112 <para>
113 The <emphasis>hardlink</emphasis> tests will fail if the host's kernel
114 does not have the option <option>CONFIG_CRYPTO_USER_API_HASH</option>
115 enabled or does not have any options providing a SHA256 implementation
116 (for example, <option>CONFIG_CRYPTO_SHA256</option>)
117 enabled. In addition, the lsfd: inotify test will
118 fail if the kernel option <option>CONFIG_NETLINK_DIAG</option> is not
119 enabled.
120 </para>
121
122 <!-- Related to non-4K page size. -->
123 <para>Two tests named <filename>fadvise/drop</filename> and
124 <filename>fincore/count</filename> are known to fail.</para>
125
126 <para>Install the package:</para>
127
128<screen><userinput remap="install">make install</userinput></screen>
129<!--
130 <para>Finally, install the man pages:</para>
131
132<screen><userinput remap="install">tar -xf ../util-linux-man-pages-&util-linux-version;.tar.xz - -directory /usr/share/man - -strip-components=1</userinput></screen>
133-->
134 </sect2>
135
136 <sect2 id="contents-utillinux" role="content">
137 <title>Contents of Util-linux</title>
138
139 <segmentedlist>
140 <segtitle>Installed programs</segtitle>
141 <segtitle>Installed libraries</segtitle>
142 <segtitle>Installed directories</segtitle>
143
144 <seglistitem>
145 <seg>addpart, agetty, blkdiscard, blkid, blkzone, blockdev, cal, cfdisk, chcpu,
146 chmem, choom, chrt, col, colcrt, colrm, column, ctrlaltdel, delpart, dmesg,
147 eject, fallocate, fdisk, fincore, findfs, findmnt, flock, fsck,
148 fsck.cramfs, fsck.minix, fsfreeze, fstrim, getopt, hardlink, hexdump, hwclock,
149 ionice, ipcmk, ipcrm, ipcs, irqtop, isosize, kill, last,
150 lastb (link to last), ldattach, linux32 (link to setarch), linux64 (link to setarch),
151 logger, look, losetup, lsblk, lscpu, lsipc, lsirq, lsfd, lslocks, lslogins,
152 lsmem, lsns, mcookie, mesg, mkfs, mkfs.bfs, mkfs.cramfs, mkfs.minix, mkswap,
153 more, mount, mountpoint, namei, nsenter, partx, pivot_root, prlimit,
154 readprofile, rename, renice, resizepart, rev, rfkill, rtcwake, script,
155 scriptlive, scriptreplay, setarch, setsid, setterm, sfdisk, sulogin, swaplabel,
156 swapoff, swapon, switch_root, taskset, uclampset, ul,
157 umount, uname26 (link to setarch), unshare, utmpdump, uuidd, uuidgen, uuidparse,
158 wall, wdctl, whereis, wipefs, and zramctl</seg>
159 <seg>libblkid.so, libfdisk.so, libmount.so,
160 libsmartcols.so, and libuuid.so</seg>
161 <seg>/usr/include/blkid,
162 /usr/include/libfdisk,
163 /usr/include/libmount,
164 /usr/include/libsmartcols,
165 /usr/include/uuid,
166 /usr/share/doc/util-linux-&util-linux-version;,
167 and /var/lib/hwclock</seg>
168 </seglistitem>
169 </segmentedlist>
170
171 <variablelist>
172 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
173 <?dbfo list-presentation="list"?>
174 <?dbhtml list-presentation="table"?>
175
176 <varlistentry id="addpart">
177 <term><command>addpart</command></term>
178 <listitem>
179 <para>Informs the Linux kernel of new partitions</para>
180 <indexterm zone="ch-system-util-linux addpart">
181 <primary sortas="b-addpart">addpart</primary>
182 </indexterm>
183 </listitem>
184 </varlistentry>
185
186 <varlistentry id="agetty">
187 <term><command>agetty</command></term>
188 <listitem>
189 <para>Opens a tty port, prompts for a login name,
190 and then invokes the <command>login</command> program</para>
191 <indexterm zone="ch-system-util-linux agetty">
192 <primary sortas="b-agetty">agetty</primary>
193 </indexterm>
194 </listitem>
195 </varlistentry>
196
197 <varlistentry id="blkdiscard">
198 <term><command>blkdiscard</command></term>
199 <listitem>
200 <para>Discards sectors on a device</para>
201 <indexterm zone="ch-system-util-linux blkdiscard">
202 <primary sortas="b-blkdiscard">blkdiscard</primary>
203 </indexterm>
204 </listitem>
205 </varlistentry>
206
207 <varlistentry id="blkid">
208 <term><command>blkid</command></term>
209 <listitem>
210 <para>A command line utility to locate and print block device
211 attributes</para>
212 <indexterm zone="ch-system-util-linux blkid">
213 <primary sortas="b-blkid">blkid</primary>
214 </indexterm>
215 </listitem>
216 </varlistentry>
217
218 <varlistentry id="blkzone">
219 <term><command>blkzone</command></term>
220 <listitem>
221 <para>Is used to manage zoned storage block devices</para>
222 <indexterm zone="ch-system-util-linux blkzone">
223 <primary sortas="b-blkzone">blkzone</primary>
224 </indexterm>
225 </listitem>
226 </varlistentry>
227
228 <varlistentry id="blockdev">
229 <term><command>blockdev</command></term>
230 <listitem>
231 <para>Allows users to call block device ioctls from the command
232 line</para>
233 <indexterm zone="ch-system-util-linux blockdev">
234 <primary sortas="b-blockdev">blockdev</primary>
235 </indexterm>
236 </listitem>
237 </varlistentry>
238
239 <varlistentry id="cal">
240 <term><command>cal</command></term>
241 <listitem>
242 <para>Displays a simple calendar</para>
243 <indexterm zone="ch-system-util-linux cal">
244 <primary sortas="b-cal">cal</primary>
245 </indexterm>
246 </listitem>
247 </varlistentry>
248
249 <varlistentry id="cfdisk">
250 <term><command>cfdisk</command></term>
251 <listitem>
252 <para>Manipulates the partition table of the given device</para>
253 <indexterm zone="ch-system-util-linux cfdisk">
254 <primary sortas="b-cfdisk">cfdisk</primary>
255 </indexterm>
256 </listitem>
257 </varlistentry>
258
259 <varlistentry id="chcpu">
260 <term><command>chcpu</command></term>
261 <listitem>
262 <para>Modifies the state of CPUs</para>
263 <indexterm zone="ch-system-util-linux chcpu">
264 <primary sortas="b-chcpu">chcpu</primary>
265 </indexterm>
266 </listitem>
267 </varlistentry>
268
269 <varlistentry id="chmem">
270 <term><command>chmem</command></term>
271 <listitem>
272 <para>Configures memory</para>
273 <indexterm zone="ch-system-util-linux chmem">
274 <primary sortas="b-chmem">chmem</primary>
275 </indexterm>
276 </listitem>
277 </varlistentry>
278
279 <varlistentry id="choom">
280 <term><command>choom</command></term>
281 <listitem>
282 <para>Displays and adjusts OOM-killer scores, used to determine
283 which process to kill first when Linux is Out Of Memory</para>
284 <indexterm zone="ch-system-util-linux choom">
285 <primary sortas="b-choom">choom</primary>
286 </indexterm>
287 </listitem>
288 </varlistentry>
289
290 <varlistentry id="chrt">
291 <term><command>chrt</command></term>
292 <listitem>
293 <para>Manipulates real-time attributes of a process</para>
294 <indexterm zone="ch-system-util-linux chrt">
295 <primary sortas="b-chrt">chrt</primary>
296 </indexterm>
297 </listitem>
298 </varlistentry>
299
300 <varlistentry id="col">
301 <term><command>col</command></term>
302 <listitem>
303 <para>Filters out reverse line feeds</para>
304 <indexterm zone="ch-system-util-linux col">
305 <primary sortas="b-col">col</primary>
306 </indexterm>
307 </listitem>
308 </varlistentry>
309
310 <varlistentry id="colcrt">
311 <term><command>colcrt</command></term>
312 <listitem>
313 <para>Filters <command>nroff</command> output for terminals
314 that lack some capabilities, such as overstriking and half-lines</para>
315 <indexterm zone="ch-system-util-linux colcrt">
316 <primary sortas="b-colcrt">colcrt</primary>
317 </indexterm>
318 </listitem>
319 </varlistentry>
320
321 <varlistentry id="colrm">
322 <term><command>colrm</command></term>
323 <listitem>
324 <para>Filters out the given columns</para>
325 <indexterm zone="ch-system-util-linux colrm">
326 <primary sortas="b-colrm">colrm</primary>
327 </indexterm>
328 </listitem>
329 </varlistentry>
330
331 <varlistentry id="column">
332 <term><command>column</command></term>
333 <listitem>
334 <para>Formats a given file into multiple columns</para>
335 <indexterm zone="ch-system-util-linux column">
336 <primary sortas="b-column">column</primary>
337 </indexterm>
338 </listitem>
339 </varlistentry>
340
341 <varlistentry id="ctrlaltdel">
342 <term><command>ctrlaltdel</command></term>
343 <listitem>
344 <para>Sets the function of the Ctrl+Alt+Del key combination to a
345 hard or a soft reset</para>
346 <indexterm zone="ch-system-util-linux ctrlaltdel">
347 <primary sortas="b-ctrlaltdel">ctrlaltdel</primary>
348 </indexterm>
349 </listitem>
350 </varlistentry>
351
352 <varlistentry id="delpart">
353 <term><command>delpart</command></term>
354 <listitem>
355 <para>Asks the Linux kernel to remove a partition</para>
356 <indexterm zone="ch-system-util-linux delpart">
357 <primary sortas="b-delpart">delpart</primary>
358 </indexterm>
359 </listitem>
360 </varlistentry>
361
362 <varlistentry id="dmesg">
363 <term><command>dmesg</command></term>
364 <listitem>
365 <para>Dumps the kernel boot messages</para>
366 <indexterm zone="ch-system-util-linux dmesg">
367 <primary sortas="b-dmesg">dmesg</primary>
368 </indexterm>
369 </listitem>
370 </varlistentry>
371
372 <varlistentry id="eject">
373 <term><command>eject</command></term>
374 <listitem>
375 <para>Ejects removable media</para>
376 <indexterm zone="ch-system-util-linux eject">
377 <primary sortas="b-eject">eject</primary>
378 </indexterm>
379 </listitem>
380 </varlistentry>
381
382 <varlistentry id="fallocate">
383 <term><command>fallocate</command></term>
384 <listitem>
385 <para>Preallocates space to a file</para>
386 <indexterm zone="ch-system-util-linux fallocate">
387 <primary sortas="b-fallocate">fallocate</primary>
388 </indexterm>
389 </listitem>
390 </varlistentry>
391
392 <varlistentry id="fdisk">
393 <term><command>fdisk</command></term>
394 <listitem>
395 <para>Manipulates the partition table of the given device</para>
396 <indexterm zone="ch-system-util-linux fdisk">
397 <primary sortas="b-fdisk">fdisk</primary>
398 </indexterm>
399 </listitem>
400 </varlistentry>
401
402 <varlistentry id="fincore">
403 <term><command>fincore</command></term>
404 <listitem>
405 <para>Counts pages of file contents in core</para>
406 <indexterm zone="ch-system-util-linux fincore">
407 <primary sortas="b-fincore">fincore</primary>
408 </indexterm>
409 </listitem>
410 </varlistentry>
411
412 <varlistentry id="findfs">
413 <term><command>findfs</command></term>
414 <listitem>
415 <para>Finds a file system, either by label or Universally Unique Identifier
416 (UUID)</para>
417 <indexterm zone="ch-system-util-linux findfs">
418 <primary sortas="b-findfs">findfs</primary>
419 </indexterm>
420 </listitem>
421 </varlistentry>
422
423 <varlistentry id="findmnt">
424 <term><command>findmnt</command></term>
425 <listitem>
426 <para>Is a command line interface to the libmount library
427 for working with mountinfo, fstab and mtab files</para>
428 <indexterm zone="ch-system-util-linux findmnt">
429 <primary sortas="b-findmnt">findmnt</primary>
430 </indexterm>
431 </listitem>
432 </varlistentry>
433
434 <varlistentry id="flock">
435 <term><command>flock</command></term>
436 <listitem>
437 <para>Acquires a file lock and then executes a command with the lock
438 held</para>
439 <indexterm zone="ch-system-util-linux flock">
440 <primary sortas="b-flock">flock</primary>
441 </indexterm>
442 </listitem>
443 </varlistentry>
444
445 <varlistentry id="fsck">
446 <term><command>fsck</command></term>
447 <listitem>
448 <para>Is used to check, and optionally repair, file systems</para>
449 <indexterm zone="ch-system-util-linux fsck">
450 <primary sortas="b-fsck">fsck</primary>
451 </indexterm>
452 </listitem>
453 </varlistentry>
454
455 <varlistentry id="fsck.cramfs">
456 <term><command>fsck.cramfs</command></term>
457 <listitem>
458 <para>Performs a consistency check on the Cramfs file system on the
459 given device</para>
460 <indexterm zone="ch-system-util-linux fsck.cramfs">
461 <primary sortas="b-fsck.cramfs">fsck.cramfs</primary>
462 </indexterm>
463 </listitem>
464 </varlistentry>
465
466 <varlistentry id="fsck.minix">
467 <term><command>fsck.minix</command></term>
468 <listitem>
469 <para>Performs a consistency check on the Minix file system on the
470 given device</para>
471 <indexterm zone="ch-system-util-linux fsck.minix">
472 <primary sortas="b-fsck.minix">fsck.minix</primary>
473 </indexterm>
474 </listitem>
475 </varlistentry>
476
477 <varlistentry id="fsfreeze">
478 <term><command>fsfreeze</command></term>
479 <listitem>
480 <para>Is a very simple wrapper around FIFREEZE/FITHAW ioctl
481 kernel driver operations</para>
482 <indexterm zone="ch-system-util-linux fsfreeze">
483 <primary sortas="b-fsfreeze">fsfreeze</primary>
484 </indexterm>
485 </listitem>
486 </varlistentry>
487
488 <varlistentry id="fstrim">
489 <term><command>fstrim</command></term>
490 <listitem>
491 <para>Discards unused blocks on a mounted filesystem</para>
492 <indexterm zone="ch-system-util-linux fstrim">
493 <primary sortas="b-fstrim">fstrim</primary>
494 </indexterm>
495 </listitem>
496 </varlistentry>
497
498 <varlistentry id="getopt">
499 <term><command>getopt</command></term>
500 <listitem>
501 <para>Parses options in the given command line</para>
502 <indexterm zone="ch-system-util-linux getopt">
503 <primary sortas="b-getopt">getopt</primary>
504 </indexterm>
505 </listitem>
506 </varlistentry>
507
508 <varlistentry id="hardlink">
509 <term><command>hardlink</command></term>
510 <listitem>
511 <para>Consolidates duplicate files by creating hard links</para>
512 <indexterm zone="ch-system-util-linux hardlink">
513 <primary sortas="b-hardlink">hardlink</primary>
514 </indexterm>
515 </listitem>
516 </varlistentry>
517
518 <varlistentry id="hexdump">
519 <term><command>hexdump</command></term>
520 <listitem>
521 <para>Dumps the given file in hexadecimal, decimal, octal,
522 or ascii</para>
523 <indexterm zone="ch-system-util-linux hexdump">
524 <primary sortas="b-hexdump">hexdump</primary>
525 </indexterm>
526 </listitem>
527 </varlistentry>
528
529 <varlistentry id="hwclock">
530 <term><command>hwclock</command></term>
531 <listitem>
532 <para>Reads or sets the system's hardware clock, also called
533 the Real-Time Clock (RTC) or Basic Input-Output System (BIOS)
534 clock</para>
535 <indexterm zone="ch-system-util-linux hwclock">
536 <primary sortas="b-hwclock">hwclock</primary>
537 </indexterm>
538 </listitem>
539 </varlistentry>
540
541 <varlistentry id="ionice">
542 <term><command>ionice</command></term>
543 <listitem>
544 <para>Gets or sets the io scheduling class and priority for a program</para>
545 <indexterm zone="ch-system-util-linux ionice">
546 <primary sortas="b-ionice">ionice</primary>
547 </indexterm>
548 </listitem>
549 </varlistentry>
550
551 <varlistentry id="ipcmk">
552 <term><command>ipcmk</command></term>
553 <listitem>
554 <para>Creates various IPC resources</para>
555 <indexterm zone="ch-system-util-linux ipcmk">
556 <primary sortas="b-ipcmk">ipcmk</primary>
557 </indexterm>
558 </listitem>
559 </varlistentry>
560
561 <varlistentry id="ipcrm">
562 <term><command>ipcrm</command></term>
563 <listitem>
564 <para>Removes the given Inter-Process Communication (IPC) resource</para>
565 <indexterm zone="ch-system-util-linux ipcrm">
566 <primary sortas="b-ipcrm">ipcrm</primary>
567 </indexterm>
568 </listitem>
569 </varlistentry>
570
571 <varlistentry id="ipcs">
572 <term><command>ipcs</command></term>
573 <listitem>
574 <para>Provides IPC status information</para>
575 <indexterm zone="ch-system-util-linux ipcs">
576 <primary sortas="b-ipcs">ipcs</primary>
577 </indexterm>
578 </listitem>
579 </varlistentry>
580
581 <varlistentry id="irqtop">
582 <term><command>irqtop</command></term>
583 <listitem>
584 <para>Displays kernel interrupt counter information in
585 <ulink role='man' url='&man;top.1'>top(1)</ulink> style
586 view</para>
587 <indexterm zone="ch-system-util-linux irqtop">
588 <primary sortas="b-irqtop">irqtop</primary>
589 </indexterm>
590 </listitem>
591 </varlistentry>
592
593 <varlistentry id="isosize">
594 <term><command>isosize</command></term>
595 <listitem>
596 <para>Reports the size of an iso9660 file system</para>
597 <indexterm zone="ch-system-util-linux isosize">
598 <primary sortas="b-isosize">isosize</primary>
599 </indexterm>
600 </listitem>
601 </varlistentry>
602
603 <varlistentry id="kill">
604 <term><command>kill</command></term>
605 <listitem>
606 <para>Sends signals to processes</para>
607 <indexterm zone="ch-system-util-linux kill">
608 <primary sortas="b-kill">kill</primary>
609 </indexterm>
610 </listitem>
611 </varlistentry>
612
613 <varlistentry id="last">
614 <term><command>last</command></term>
615 <listitem>
616 <para>Shows which users last logged in (and out), searching back
617 through the <filename>/var/log/wtmp</filename> file; it also shows
618 system boots, shutdowns, and run-level changes</para>
619 <indexterm zone="ch-system-util-linux last">
620 <primary sortas="b-last">last</primary>
621 </indexterm>
622 </listitem>
623 </varlistentry>
624
625 <varlistentry id="lastb">
626 <term><command>lastb</command></term>
627 <listitem>
628 <para>Shows the failed login attempts, as logged in
629 <filename>/var/log/btmp</filename></para>
630 <indexterm zone="ch-system-util-linux lastb">
631 <primary sortas="b-lastb">lastb</primary>
632 </indexterm>
633 </listitem>
634 </varlistentry>
635
636 <varlistentry id="ldattach">
637 <term><command>ldattach</command></term>
638 <listitem>
639 <para>Attaches a line discipline to a serial line</para>
640 <indexterm zone="ch-system-util-linux ldattach">
641 <primary sortas="b-ldattach">ldattach</primary>
642 </indexterm>
643 </listitem>
644 </varlistentry>
645
646 <varlistentry id="linux32">
647 <term><command>linux32</command></term>
648 <listitem>
649 <para>A symbolic link to setarch</para>
650 <indexterm zone="ch-system-util-linux linux32">
651 <primary sortas="b-linux32">linux32</primary>
652 </indexterm>
653 </listitem>
654 </varlistentry>
655
656 <varlistentry id="linux64">
657 <term><command>linux64</command></term>
658 <listitem>
659 <para>A symbolic link to setarch</para>
660 <indexterm zone="ch-system-util-linux linux64">
661 <primary sortas="b-linux64">linux64</primary>
662 </indexterm>
663 </listitem>
664 </varlistentry>
665
666 <varlistentry id="logger">
667 <term><command>logger</command></term>
668 <listitem>
669 <para>Enters the given message into the system log</para>
670 <indexterm zone="ch-system-util-linux logger">
671 <primary sortas="b-logger">logger</primary>
672 </indexterm>
673 </listitem>
674 </varlistentry>
675
676 <varlistentry id="look">
677 <term><command>look</command></term>
678 <listitem>
679 <para>Displays lines that begin with the given string</para>
680 <indexterm zone="ch-system-util-linux look">
681 <primary sortas="b-look">look</primary>
682 </indexterm>
683 </listitem>
684 </varlistentry>
685
686 <varlistentry id="losetup">
687 <term><command>losetup</command></term>
688 <listitem>
689 <para>Sets up and controls loop devices</para>
690 <indexterm zone="ch-system-util-linux losetup">
691 <primary sortas="b-losetup">losetup</primary>
692 </indexterm>
693 </listitem>
694 </varlistentry>
695
696 <varlistentry id="lsblk">
697 <term><command>lsblk</command></term>
698 <listitem>
699 <para>Lists information about all or selected block devices in
700 a tree-like format</para>
701 <indexterm zone="ch-system-util-linux lsblk">
702 <primary sortas="b-lsblk">lsblk</primary>
703 </indexterm>
704 </listitem>
705 </varlistentry>
706
707 <varlistentry id="lscpu">
708 <term><command>lscpu</command></term>
709 <listitem>
710 <para>Prints CPU architecture information</para>
711 <indexterm zone="ch-system-util-linux lscpu">
712 <primary sortas="b-lscpu">lscpu</primary>
713 </indexterm>
714 </listitem>
715 </varlistentry>
716
717 <varlistentry id="lsfd">
718 <term><command>lsfd</command></term>
719 <listitem>
720 <para>Displays information about open files; replaces <command>lsof</command></para>
721 <indexterm zone="ch-system-util-linux lsfd">
722 <primary sortas="b-lsfd">lsfd</primary>
723 </indexterm>
724 </listitem>
725 </varlistentry>
726
727 <varlistentry id="lsipc">
728 <term><command>lsipc</command></term>
729 <listitem>
730 <para>Prints information on IPC facilities currently employed
731 in the system</para>
732 <indexterm zone="ch-system-util-linux lsipc">
733 <primary sortas="b-lsipc">lsipc</primary>
734 </indexterm>
735 </listitem>
736 </varlistentry>
737
738 <varlistentry id="lsirq">
739 <term><command>lsirq</command></term>
740 <listitem>
741 <para>Displays kernel interrupt counter information</para>
742 <indexterm zone="ch-system-util-linux lsirq">
743 <primary sortas="b-lsirq">lsirq</primary>
744 </indexterm>
745 </listitem>
746 </varlistentry>
747
748 <varlistentry id="lslocks">
749 <term><command>lslocks</command></term>
750 <listitem>
751 <para>Lists local system locks</para>
752 <indexterm zone="ch-system-util-linux lslocks">
753 <primary sortas="b-lslocks">lslocks</primary>
754 </indexterm>
755 </listitem>
756 </varlistentry>
757
758 <varlistentry id="lslogins">
759 <term><command>lslogins</command></term>
760 <listitem>
761 <para>Lists information about users, groups and system accounts</para>
762 <indexterm zone="ch-system-util-linux lslogins">
763 <primary sortas="b-lslogins">lslogins</primary>
764 </indexterm>
765 </listitem>
766 </varlistentry>
767
768 <varlistentry id="lsmem">
769 <term><command>lsmem</command></term>
770 <listitem>
771 <para>Lists the ranges of available memory with their online
772 status</para>
773 <indexterm zone="ch-system-util-linux lsmem">
774 <primary sortas="b-lsmem">lsmem</primary>
775 </indexterm>
776 </listitem>
777 </varlistentry>
778
779 <varlistentry id="lsns">
780 <term><command>lsns</command></term>
781 <listitem>
782 <para>Lists namespaces</para>
783 <indexterm zone="ch-system-util-linux lsns">
784 <primary sortas="b-lsns">lsns</primary>
785 </indexterm>
786 </listitem>
787 </varlistentry>
788
789 <varlistentry id="mcookie">
790 <term><command>mcookie</command></term>
791 <listitem>
792 <para>Generates magic cookies (128-bit random hexadecimal numbers) for
793 <command>xauth</command></para>
794 <indexterm zone="ch-system-util-linux mcookie">
795 <primary sortas="b-mcookie">mcookie</primary>
796 </indexterm>
797 </listitem>
798 </varlistentry>
799
800 <varlistentry id="mesg">
801 <term><command>mesg</command></term>
802 <listitem>
803 <para>Controls whether other users can send messages to the current
804 user's terminal</para>
805 <indexterm zone="ch-system-util-linux mesg">
806 <primary sortas="b-mesg">mesg</primary>
807 </indexterm>
808 </listitem>
809 </varlistentry>
810
811 <varlistentry id="mkfs">
812 <term><command>mkfs</command></term>
813 <listitem>
814 <para>Builds a file system on a device (usually a hard disk
815 partition)</para>
816 <indexterm zone="ch-system-util-linux mkfs">
817 <primary sortas="b-mkfs">mkfs</primary>
818 </indexterm>
819 </listitem>
820 </varlistentry>
821
822 <varlistentry id="mkfs.bfs">
823 <term><command>mkfs.bfs</command></term>
824 <listitem>
825 <para>Creates a Santa Cruz Operations (SCO) bfs file system</para>
826 <indexterm zone="ch-system-util-linux mkfs.bfs">
827 <primary sortas="b-mkfs.bfs">mkfs.bfs</primary>
828 </indexterm>
829 </listitem>
830 </varlistentry>
831
832 <varlistentry id="mkfs.cramfs">
833 <term><command>mkfs.cramfs</command></term>
834 <listitem>
835 <para>Creates a cramfs file system</para>
836 <indexterm zone="ch-system-util-linux mkfs.cramfs">
837 <primary sortas="b-mkfs.cramfs">mkfs.cramfs</primary>
838 </indexterm>
839 </listitem>
840 </varlistentry>
841
842 <varlistentry id="mkfs.minix">
843 <term><command>mkfs.minix</command></term>
844 <listitem>
845 <para>Creates a Minix file system</para>
846 <indexterm zone="ch-system-util-linux mkfs.minix">
847 <primary sortas="b-mkfs.minix">mkfs.minix</primary>
848 </indexterm>
849 </listitem>
850 </varlistentry>
851
852 <varlistentry id="mkswap">
853 <term><command>mkswap</command></term>
854 <listitem>
855 <para>Initializes the given device or file to be used as a swap
856 area</para>
857 <indexterm zone="ch-system-util-linux mkswap">
858 <primary sortas="b-mkswap">mkswap</primary>
859 </indexterm>
860 </listitem>
861 </varlistentry>
862
863 <varlistentry id="more">
864 <term><command>more</command></term>
865 <listitem>
866 <para>A filter for paging through text one screen at a time</para>
867 <indexterm zone="ch-system-util-linux more">
868 <primary sortas="b-more">more</primary>
869 </indexterm>
870 </listitem>
871 </varlistentry>
872
873 <varlistentry id="mount">
874 <term><command>mount</command></term>
875 <listitem>
876 <para>Attaches the file system on the given device to a specified
877 directory in the file-system tree</para>
878 <indexterm zone="ch-system-util-linux mount">
879 <primary sortas="b-mount">mount</primary>
880 </indexterm>
881 </listitem>
882 </varlistentry>
883
884 <varlistentry id="mountpoint">
885 <term><command>mountpoint</command></term>
886 <listitem>
887 <para>Checks if the directory is a mountpoint</para>
888 <indexterm zone="ch-system-util-linux mountpoint">
889 <primary sortas="b-mountpoint">mountpoint</primary>
890 </indexterm>
891 </listitem>
892 </varlistentry>
893
894 <varlistentry id="namei">
895 <term><command>namei</command></term>
896 <listitem>
897 <para>Shows the symbolic links in the given paths</para>
898 <indexterm zone="ch-system-util-linux namei">
899 <primary sortas="b-namei">namei</primary>
900 </indexterm>
901 </listitem>
902 </varlistentry>
903
904 <varlistentry id="nsenter">
905 <term><command>nsenter</command></term>
906 <listitem>
907 <para>Runs a program with namespaces of other processes</para>
908 <indexterm zone="ch-system-util-linux nsenter">
909 <primary sortas="b-nsenter">nsenter</primary>
910 </indexterm>
911 </listitem>
912 </varlistentry>
913
914 <varlistentry id="partx">
915 <term><command>partx</command></term>
916 <listitem>
917 <para>Tells the kernel about the presence and numbering of on-disk
918 partitions</para>
919 <indexterm zone="ch-system-util-linux partx">
920 <primary sortas="b-partx">partx</primary>
921 </indexterm>
922 </listitem>
923 </varlistentry>
924
925 <varlistentry id="pivot_root">
926 <term><command>pivot_root</command></term>
927 <listitem>
928 <para>Makes the given file system the new root file system of the
929 current process</para>
930 <indexterm zone="ch-system-util-linux pivot_root">
931 <primary sortas="b-pivot_root">pivot_root</primary>
932 </indexterm>
933 </listitem>
934 </varlistentry>
935
936 <varlistentry id="prlimit">
937 <term><command>prlimit</command></term>
938 <listitem>
939 <para>Gets and sets a process's resource limits</para>
940 <indexterm zone="ch-system-util-linux prlimit">
941 <primary sortas="b-prlimit">prlimit</primary>
942 </indexterm>
943 </listitem>
944 </varlistentry>
945
946 <varlistentry id="readprofile">
947 <term><command>readprofile</command></term>
948 <listitem>
949 <para>Reads kernel profiling information</para>
950 <indexterm zone="ch-system-util-linux readprofile">
951 <primary sortas="b-readprofile">readprofile</primary>
952 </indexterm>
953 </listitem>
954 </varlistentry>
955
956 <varlistentry id="rename">
957 <term><command>rename</command></term>
958 <listitem>
959 <para>Renames the given files, replacing a given string with
960 another</para>
961 <indexterm zone="ch-system-util-linux rename">
962 <primary sortas="b-rename">rename</primary>
963 </indexterm>
964 </listitem>
965 </varlistentry>
966
967 <varlistentry id="renice">
968 <term><command>renice</command></term>
969 <listitem>
970 <para>Alters the priority of running processes</para>
971 <indexterm zone="ch-system-util-linux renice">
972 <primary sortas="b-renice">renice</primary>
973 </indexterm>
974 </listitem>
975 </varlistentry>
976
977 <varlistentry id="resizepart">
978 <term><command>resizepart</command></term>
979 <listitem>
980 <para>Asks the Linux kernel to resize a partition</para>
981 <indexterm zone="ch-system-util-linux resizepart">
982 <primary sortas="b-resizepart">resizepart</primary>
983 </indexterm>
984 </listitem>
985 </varlistentry>
986
987 <varlistentry id="rev">
988 <term><command>rev</command></term>
989 <listitem>
990 <para>Reverses the lines of a given file</para>
991 <indexterm zone="ch-system-util-linux rev">
992 <primary sortas="b-rev">rev</primary>
993 </indexterm>
994 </listitem>
995 </varlistentry>
996
997 <varlistentry id="rfkill">
998 <term><command>rfkill</command></term>
999 <listitem>
1000 <para>Tool for enabling and disabling wireless devices</para>
1001 <indexterm zone="ch-system-util-linux rfkill">
1002 <primary sortas="b-rfkill">rfkill</primary>
1003 </indexterm>
1004 </listitem>
1005 </varlistentry>
1006
1007 <varlistentry id="rtcwake">
1008 <term><command>rtcwake</command></term>
1009 <listitem>
1010 <para>Used to enter a system sleep state until the specified wakeup
1011 time</para>
1012 <indexterm zone="ch-system-util-linux rtcwake">
1013 <primary sortas="b-rtcwake">rtcwake</primary>
1014 </indexterm>
1015 </listitem>
1016 </varlistentry>
1017
1018 <varlistentry id="script">
1019 <term><command>script</command></term>
1020 <listitem>
1021 <para>Makes a typescript of a terminal session</para>
1022 <indexterm zone="ch-system-util-linux script">
1023 <primary sortas="b-script">script</primary>
1024 </indexterm>
1025 </listitem>
1026 </varlistentry>
1027
1028 <varlistentry id="scriptlive">
1029 <term><command>scriptlive</command></term>
1030 <listitem>
1031 <para>Re-runs session typescripts using timing information</para>
1032 <indexterm zone="ch-system-util-linux scriptlive">
1033 <primary sortas="b-scriptlive">scriptlive</primary>
1034 </indexterm>
1035 </listitem>
1036 </varlistentry>
1037
1038 <varlistentry id="scriptreplay">
1039 <term><command>scriptreplay</command></term>
1040 <listitem>
1041 <para>Plays back typescripts using timing information</para>
1042 <indexterm zone="ch-system-util-linux scriptreplay">
1043 <primary sortas="b-scriptreplay">scriptreplay</primary>
1044 </indexterm>
1045 </listitem>
1046 </varlistentry>
1047
1048 <varlistentry id="setarch">
1049 <term><command>setarch</command></term>
1050 <listitem>
1051 <para>Changes reported architecture in a new program environment, and
1052 sets personality flags</para>
1053 <indexterm zone="ch-system-util-linux setarch">
1054 <primary sortas="b-setarch">setarch</primary>
1055 </indexterm>
1056 </listitem>
1057 </varlistentry>
1058
1059 <varlistentry id="setsid">
1060 <term><command>setsid</command></term>
1061 <listitem>
1062 <para>Runs the given program in a new session</para>
1063 <indexterm zone="ch-system-util-linux setsid">
1064 <primary sortas="b-setsid">setsid</primary>
1065 </indexterm>
1066 </listitem>
1067 </varlistentry>
1068
1069 <varlistentry id="setterm">
1070 <term><command>setterm</command></term>
1071 <listitem>
1072 <para>Sets terminal attributes</para>
1073 <indexterm zone="ch-system-util-linux setterm">
1074 <primary sortas="b-setterm">setterm</primary>
1075 </indexterm>
1076 </listitem>
1077 </varlistentry>
1078
1079 <varlistentry id="sfdisk">
1080 <term><command>sfdisk</command></term>
1081 <listitem>
1082 <para>A disk partition table manipulator</para>
1083 <indexterm zone="ch-system-util-linux sfdisk">
1084 <primary sortas="b-sfdisk">sfdisk</primary>
1085 </indexterm>
1086 </listitem>
1087 </varlistentry>
1088
1089 <varlistentry id="sulogin">
1090 <term><command>sulogin</command></term>
1091 <listitem>
1092 <para>Allows <systemitem class="username">root</systemitem> to log in;
1093 it is normally invoked by <command>init</command> when the system goes
1094 into single user mode</para>
1095 <indexterm zone="ch-system-util-linux sulogin">
1096 <primary sortas="b-sulogin">sulogin</primary>
1097 </indexterm>
1098 </listitem>
1099 </varlistentry>
1100
1101 <varlistentry id="swaplabel">
1102 <term><command>swaplabel</command></term>
1103 <listitem>
1104 <para>Makes changes to the swap area's UUID and label</para>
1105 <indexterm zone="ch-system-util-linux swaplabel">
1106 <primary sortas="b-swaplabel">swaplabel</primary>
1107 </indexterm>
1108 </listitem>
1109 </varlistentry>
1110
1111 <varlistentry id="swapoff">
1112 <term><command>swapoff</command></term>
1113 <listitem>
1114 <para>Disables devices and files for paging and swapping</para>
1115 <indexterm zone="ch-system-util-linux swapoff">
1116 <primary sortas="b-swapoff">swapoff</primary>
1117 </indexterm>
1118 </listitem>
1119 </varlistentry>
1120
1121 <varlistentry id="swapon">
1122 <term><command>swapon</command></term>
1123 <listitem>
1124 <para>Enables devices and files for paging and swapping, and
1125 lists the devices and files currently in use</para>
1126 <indexterm zone="ch-system-util-linux swapon">
1127 <primary sortas="b-swapon">swapon</primary>
1128 </indexterm>
1129 </listitem>
1130 </varlistentry>
1131
1132 <varlistentry id="switch_root">
1133 <term><command>switch_root</command></term>
1134 <listitem>
1135 <para>Switches to another filesystem as the root of the mount tree</para>
1136 <indexterm zone="ch-system-util-linux switch_root">
1137 <primary sortas="b-switch_root">switch_root</primary>
1138 </indexterm>
1139 </listitem>
1140 </varlistentry>
1141
1142 <varlistentry id="taskset">
1143 <term><command>taskset</command></term>
1144 <listitem>
1145 <para>Retrieves or sets a process's CPU affinity</para>
1146 <indexterm zone="ch-system-util-linux taskset">
1147 <primary sortas="b-taskset">taskset</primary>
1148 </indexterm>
1149 </listitem>
1150 </varlistentry>
1151
1152 <varlistentry id="uclampset">
1153 <term><command>uclampset</command></term>
1154 <listitem>
1155 <para>Manipulates the utilization clamping attributes of the
1156 system or a process</para>
1157 <indexterm zone="ch-system-util-linux uclampset">
1158 <primary sortas="b-uclampset">uclampset</primary>
1159 </indexterm>
1160 </listitem>
1161 </varlistentry>
1162
1163 <varlistentry id="ul">
1164 <term><command>ul</command></term>
1165 <listitem>
1166 <para>A filter for translating underscores into escape sequences
1167 indicating underlining for the terminal in use</para>
1168 <indexterm zone="ch-system-util-linux ul">
1169 <primary sortas="b-ul">ul</primary>
1170 </indexterm>
1171 </listitem>
1172 </varlistentry>
1173
1174 <varlistentry id="umount">
1175 <term><command>umount</command></term>
1176 <listitem>
1177 <para>Disconnects a file system from the system's file tree</para>
1178 <indexterm zone="ch-system-util-linux umount">
1179 <primary sortas="b-umount">umount</primary>
1180 </indexterm>
1181 </listitem>
1182 </varlistentry>
1183
1184 <varlistentry id="uname26">
1185 <term><command>uname26</command></term>
1186 <listitem>
1187 <para>A symbolic link to setarch</para>
1188 <indexterm zone="ch-system-util-linux uname26">
1189 <primary sortas="b-uname26">uname26</primary>
1190 </indexterm>
1191 </listitem>
1192 </varlistentry>
1193
1194 <varlistentry id="unshare">
1195 <term><command>unshare</command></term>
1196 <listitem>
1197 <para>Runs a program with some namespaces unshared from parent</para>
1198 <indexterm zone="ch-system-util-linux unshare">
1199 <primary sortas="b-unshare">unshare</primary>
1200 </indexterm>
1201 </listitem>
1202 </varlistentry>
1203
1204 <varlistentry id="utmpdump">
1205 <term><command>utmpdump</command></term>
1206 <listitem>
1207 <para>Displays the content of the given login file in a
1208 user-friendly format</para>
1209 <indexterm zone="ch-system-util-linux utmpdump">
1210 <primary sortas="b-utmpdump">utmpdump</primary>
1211 </indexterm>
1212 </listitem>
1213 </varlistentry>
1214
1215 <varlistentry id="uuidd">
1216 <term><command>uuidd</command></term>
1217 <listitem>
1218 <para>A daemon used by the UUID library to generate time-based
1219 UUIDs in a secure and guaranteed-unique fashion</para>
1220 <indexterm zone="ch-system-util-linux uuidd">
1221 <primary sortas="b-uuidd">uuidd</primary>
1222 </indexterm>
1223 </listitem>
1224 </varlistentry>
1225
1226 <varlistentry id="uuidgen">
1227 <term><command>uuidgen</command></term>
1228 <listitem>
1229 <para>Creates new UUIDs. Each new UUID is a random number likely to be
1230 unique among all UUIDs created, on the local system and on other
1231 systems, in the past and in the future, with extremely high
1232 probability (2<superscript>128</superscript> UUIDs are
1233 possible)</para>
1234 <indexterm zone="ch-system-util-linux uuidgen">
1235 <primary sortas="b-uuidgen">uuidgen</primary>
1236 </indexterm>
1237 </listitem>
1238 </varlistentry>
1239
1240 <varlistentry id="uuidparse">
1241 <term><command>uuidparse</command></term>
1242 <listitem>
1243 <para>A utility to parse unique identifiers</para>
1244 <indexterm zone="ch-system-util-linux uuidparse">
1245 <primary sortas="b-uuidparse">uuidparse</primary>
1246 </indexterm>
1247 </listitem>
1248 </varlistentry>
1249
1250 <varlistentry id="wall">
1251 <term><command>wall</command></term>
1252 <listitem>
1253 <para>Displays the contents of a file or, by default, its standard
1254 input, on the terminals of all currently logged in users</para>
1255 <indexterm zone="ch-system-util-linux wall">
1256 <primary sortas="b-wall">wall</primary>
1257 </indexterm>
1258 </listitem>
1259 </varlistentry>
1260
1261 <varlistentry id="wdctl">
1262 <term><command>wdctl</command></term>
1263 <listitem>
1264 <para>Shows hardware watchdog status</para>
1265 <indexterm zone="ch-system-util-linux wdctl">
1266 <primary sortas="b-wdctl">wdctl</primary>
1267 </indexterm>
1268 </listitem>
1269 </varlistentry>
1270
1271 <varlistentry id="whereis">
1272 <term><command>whereis</command></term>
1273 <listitem>
1274 <para>Reports the location of the binary, source, and man page
1275 files for the given command</para>
1276 <indexterm zone="ch-system-util-linux whereis">
1277 <primary sortas="b-whereis">whereis</primary>
1278 </indexterm>
1279 </listitem>
1280 </varlistentry>
1281
1282 <varlistentry id="wipefs">
1283 <term><command>wipefs</command></term>
1284 <listitem>
1285 <para>Wipes a filesystem signature from a device</para>
1286 <indexterm zone="ch-system-util-linux wipefs">
1287 <primary sortas="b-wipefs">wipefs</primary>
1288 </indexterm>
1289 </listitem>
1290 </varlistentry>
1291
1292 <varlistentry id="zramctl">
1293 <term><command>zramctl</command></term>
1294 <listitem>
1295 <para>A program to set up and control zram (compressed ram disk)
1296 devices</para>
1297 <indexterm zone="ch-system-util-linux zramctl">
1298 <primary sortas="b-zramctl">zramctl</primary>
1299 </indexterm>
1300 </listitem>
1301 </varlistentry>
1302
1303 <varlistentry id="libblkid">
1304 <term><filename class="libraryfile">libblkid</filename></term>
1305 <listitem>
1306 <para>Contains routines for device identification and token
1307 extraction</para>
1308 <indexterm zone="ch-system-util-linux libblkid">
1309 <primary sortas="c-libblkid">libblkid</primary>
1310 </indexterm>
1311 </listitem>
1312 </varlistentry>
1313
1314 <varlistentry id="libfdisk">
1315 <term><filename class="libraryfile">libfdisk</filename></term>
1316 <listitem>
1317 <para>Contains routines for manipulating partition tables</para>
1318 <indexterm zone="ch-system-util-linux libfdisk">
1319 <primary sortas="c-libfdisk">libfdisk</primary>
1320 </indexterm>
1321 </listitem>
1322 </varlistentry>
1323
1324 <varlistentry id="libmount">
1325 <term><filename class="libraryfile">libmount</filename></term>
1326 <listitem>
1327 <para>Contains routines for block device mounting and
1328 unmounting</para>
1329 <indexterm zone="ch-system-util-linux libmount">
1330 <primary sortas="c-libmount">libmount</primary>
1331 </indexterm>
1332 </listitem>
1333 </varlistentry>
1334
1335 <varlistentry id="libsmartcols">
1336 <term><filename class="libraryfile">libsmartcols</filename></term>
1337 <listitem>
1338 <para>Contains routines for aiding screen output in tabular form</para>
1339 <indexterm zone="ch-system-util-linux libsmartcols">
1340 <primary sortas="c-libsmartcols">libsmartcols</primary>
1341 </indexterm>
1342 </listitem>
1343 </varlistentry>
1344
1345 <varlistentry id="libuuid">
1346 <term><filename class="libraryfile">libuuid</filename></term>
1347 <listitem>
1348 <para>Contains routines for generating unique identifiers for objects
1349 that may be accessible beyond the local system</para>
1350 <indexterm zone="ch-system-util-linux libuuid">
1351 <primary sortas="c-libuuid">libuuid</primary>
1352 </indexterm>
1353 </listitem>
1354 </varlistentry>
1355
1356 </variablelist>
1357
1358 </sect2>
1359
1360</sect1>
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