source: chapter06/util-linux.xml@ ac340c2

ml-11.0 multilib
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MultiLib: Merge changes from trunk

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[673b0d8]1<?xml version="1.0" encoding="ISO-8859-1"?>
[b06ca36]2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
[673b0d8]4 <!ENTITY % general-entities SYSTEM "../general.ent">
5 %general-entities;
6]>
[ddd5542]7
[e1428f3]8<sect1 id="ch-system-util-linux" role="wrap">
9 <?dbhtml filename="util-linux.html"?>
[ddd5542]10
[e747759]11 <sect1info condition="script">
[e1428f3]12 <productname>util-linux</productname>
13 <productnumber>&util-linux-version;</productnumber>
14 <address>&util-linux-url;</address>
[e747759]15 </sect1info>
16
[e1428f3]17 <title>Util-linux-&util-linux-version;</title>
[ddd5542]18
[e1428f3]19 <indexterm zone="ch-system-util-linux">
20 <primary sortas="a-Util-linux">Util-linux</primary>
[ddd5542]21 </indexterm>
22
23 <sect2 role="package">
24 <title/>
25
[e1428f3]26 <para>The Util-linux package contains miscellaneous utility programs.
[4bac71c]27 Among them are utilities for handling file systems, consoles, partitions,
28 and messages.</para>
[ddd5542]29
30 <segmentedlist>
31 <segtitle>&buildtime;</segtitle>
32 <segtitle>&diskspace;</segtitle>
33
34 <seglistitem>
[e1428f3]35 <seg>&util-linux-ch6-sbu;</seg>
36 <seg>&util-linux-ch6-du;</seg>
[ddd5542]37 </seglistitem>
38 </segmentedlist>
39
40 </sect2>
41
42 <sect2 role="installation">
43 <title>FHS compliance notes</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
[14109e7]48 location for the <filename>adjtime</filename> file. First create a directory
49 to enable storage for the <command>hwclock</command> program:</para>
[673b0d8]50
[14109e7]51<screen><userinput remap="pre">mkdir -pv /var/lib/hwclock</userinput></screen>
[673b0d8]52
[ddd5542]53 </sect2>
[673b0d8]54
[ddd5542]55 <sect2 role="installation">
[e1428f3]56 <title>Installation of Util-linux</title>
[96e9f0b]57<!--
[3b66f6a]58 <para>First, fix one of the regression tests:</para>
59
60<screen><userinput remap="pre">sed -e 's/2^64/(2^64/' -e 's/E &lt;/E) &lt;=/' -e 's/ne /eq /' \
61 -i tests/ts/ipcs/limits2</userinput></screen>
[96e9f0b]62-->
[1803e9b]63 <para revision="systemd">Remove the earlier created symlinks:</para>
[f1e1fe6]64
[1803e9b]65<screen revision="systemd"><userinput remap="pre">rm -vf /usr/include/{blkid,libmount,uuid}</userinput></screen>
[f1e1fe6]66
[4783efe]67 <para>Prepare Util-linux for compilation:</para>
[12d9bda6]68
[1118b17]69<screen revision="sysv"><userinput remap="configure">./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
[96e9f0b]70 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
71 --disable-chfn-chsh \
72 --disable-login \
[e1ceb81]73 --disable-nologin \
[96e9f0b]74 --disable-su \
75 --disable-setpriv \
76 --disable-runuser \
77 --disable-pylibmount \
[73b2841]78 --disable-static \
[96e9f0b]79 --without-python \
80 --without-systemd \
81 --without-systemdsystemunitdir</userinput></screen>
82
[1118b17]83<screen revision="systemd"><userinput remap="configure">./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
84 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
85 --disable-chfn-chsh \
86 --disable-login \
87 --disable-nologin \
88 --disable-su \
89 --disable-setpriv \
90 --disable-runuser \
91 --disable-pylibmount \
92 --disable-static \
[121cdc9]93 --without-python</userinput></screen>
[1118b17]94
[96e9f0b]95 <para>The --disable and --without options prevent warnings about
96 building components that require packages not in LFS or are
97 inconsistent with programs installed by other packages.</para>
[673b0d8]98
[ddd5542]99 <para>Compile the package:</para>
[673b0d8]100
[e990ec99]101<screen><userinput remap="make">make</userinput></screen>
[0556946]102
[6c4092b0]103 <para>If desired, run the test suite as a non-root user:</para>
104
105 <warning><para>Running the test suite as the root user can be harmful to
[4783efe]106 your system. To run it, the CONFIG_SCSI_DEBUG option for the kernel must
107 be available in the currently running system, and must be built as a
108 module. Building it into the kernel will prevent booting. For complete
109 coverage, other BLFS packages must be installed. If desired, this test can
110 be run after rebooting into the completed LFS system and running:</para>
[6c4092b0]111
112 <screen role="nodump"><userinput>bash tests/run.sh --srcdir=$PWD --builddir=$PWD</userinput></screen>
113 </warning>
114
115 <screen><userinput remap="test">chown -Rv nobody .
[f55c13f]116su nobody -s /bin/bash -c "PATH=$PATH make -k check"</userinput></screen>
[673b0d8]117
[0b8bbee]118 <para>Install the package:</para>
119
[4bac71c]120<screen><userinput remap="install">make install</userinput></screen>
[b3f1ebb3]121
122 </sect2>
123
[fd48baa]124 <!-- ~~~~~~~~~~~~~~~~~~~~ ABI 32 ~~~~~~~~~~~~~~~~~~~~ -->
125
126 <sect2 arch="ml_32,ml_all" role="installation">
[b3f1ebb3]127 <title>Installation of Util-linux - 32-bit</title>
128
129 <para>Clean previous build:</para>
130
131<screen><userinput remap="pre">make distclean</userinput></screen>
132
133 <para>Prepare Util-linux for compilation:</para>
134
135<screen revision="sysv"><userinput remap="configure">CC="gcc -m32" \
136./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
137 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
138 --disable-chfn-chsh \
139 --disable-login \
140 --disable-nologin \
141 --disable-su \
142 --disable-setpriv \
143 --disable-runuser \
144 --disable-pylibmount \
145 --disable-static \
146 --without-python \
147 --without-systemd \
148 --libdir=/usr/lib32 \
149 --host=i686-pc-linux-gnu \
150 --without-systemdsystemunitdir \
151 --enable-libmount-force-mountinfo</userinput></screen>
152
153<screen revision="systemd"><userinput remap="configure">CC="gcc -m32" \
154./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
155 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
156 --disable-chfn-chsh \
157 --disable-login \
158 --disable-nologin \
159 --disable-su \
160 --disable-setpriv \
161 --disable-runuser \
162 --disable-pylibmount \
163 --disable-static \
164 --without-python \
165 --libdir=/usr/lib32 \
166 --host=i686-pc-linux-gnu \
167 --enable-libmount-force-mountinfo</userinput></screen>
168
169 <para>Compile the package:</para>
170
171<screen><userinput remap="make">make</userinput></screen>
172
173 <para>Install the package:</para>
174
175<screen><userinput remap="install">make DESTDIR=$PWD/DESTDIR install
176cp -Rv DESTDIR/usr/lib32/* /usr/lib32
177rm -rf DESTDIR</userinput></screen>
178
179 </sect2>
180
[fd48baa]181 <!-- ~~~~~~~~~~~~~~~~~~~~ ABI x32 ~~~~~~~~~~~~~~~~~~~~ -->
182
183 <sect2 arch="ml_x32,ml_all" role="installation">
[b3f1ebb3]184 <title>Installation of Util-linux - x32-bit</title>
185
186 <para>Clean previous build:</para>
187
188<screen><userinput remap="pre">make distclean</userinput></screen>
189
190 <para>Prepare Util-linux for compilation:</para>
191
192<screen revision="sysv"><userinput remap="configure">CC="gcc -mx32" \
193./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
194 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
195 --disable-chfn-chsh \
196 --disable-login \
197 --disable-nologin \
198 --disable-su \
199 --disable-setpriv \
200 --disable-runuser \
201 --disable-pylibmount \
202 --disable-static \
203 --without-python \
204 --without-systemd \
205 --without-systemdsystemunitdir \
206 --libdir=/usr/libx32 \
207 --host=x86_64-pc-linux-gnux32 \
208 --enable-libmount-force-mountinfo</userinput></screen>
209
210<screen revision="systemd"><userinput remap="configure">CC="gcc -mx32" \
211./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
212 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
213 --disable-chfn-chsh \
214 --disable-login \
215 --disable-nologin \
216 --disable-su \
217 --disable-setpriv \
218 --disable-runuser \
219 --disable-pylibmount \
220 --disable-static \
221 --without-python \
222 --libdir=/usr/libx32 \
223 --host=x86_64-pc-linux-gnux32 \
224 --enable-libmount-force-mountinfo</userinput></screen>
225
226 <para>Compile the package:</para>
227
228<screen><userinput remap="make">make</userinput></screen>
229
230 <para>Install the package:</para>
231
232<screen><userinput remap="install">make DESTDIR=$PWD/DESTDIR install
233cp -Rv DESTDIR/usr/libx32/* /usr/libx32
234rm -rf DESTDIR</userinput></screen>
[673b0d8]235
[ddd5542]236 </sect2>
237
238 <sect2 id="contents-utillinux" role="content">
[e1428f3]239 <title>Contents of Util-linux</title>
[ddd5542]240
241 <segmentedlist>
242 <segtitle>Installed programs</segtitle>
[cd82ee5]243 <segtitle>Installed libraries</segtitle>
[fe05b08]244 <segtitle>Installed directories</segtitle>
[ddd5542]245
246 <seglistitem>
[78cc3be]247 <seg>addpart, agetty, blkdiscard, blkid, blkzone, blockdev, cal, cfdisk, chcpu,
248 chmem, choom, chrt, col, colcrt, colrm, column, ctrlaltdel, delpart, dmesg,
249 eject, fallocate, fdformat, fdisk, fincore, findfs, findmnt, flock, fsck,
[4783efe]250 fsck.cramfs, fsck.minix, fsfreeze, fstrim, getopt, hexdump, hwclock,
251 i386, ionice, ipcmk, ipcrm, ipcs, isosize, kill, last, lastb (link to
252 last), ldattach, linux32, linux64, logger, look, losetup, lsblk, lscpu,
[78cc3be]253 lsipc, lslocks, lslogins, lsmem, lsns, mcookie, mesg, mkfs, mkfs.bfs, mkfs.cramfs, mkfs.minix, mkswap,
254 more, mount, mountpoint, namei, nsenter, partx, pivot_root, prlimit, raw,
255 readprofile, rename, renice, resizepart, rev, rfkill, rtcwake, script,
[4783efe]256 scriptreplay, setarch, setsid, setterm, sfdisk, sulogin, swaplabel,
[78cc3be]257 swapoff (link to swapon), swapon, switch_root, taskset, ul,
258 umount, uname26, unshare, utmpdump, uuidd, uuidgen, uuidparse, wall, wdctl, whereis,
[eb8b1c5]259 wipefs, x86_64, and zramctl</seg>
[040ecb6]260 <seg>libblkid.so, libfdisk.so, libmount.so,
261 libsmartcols.so, and libuuid.so</seg>
262 <seg>/usr/include/blkid,
263 /usr/include/libfdisk,
264 /usr/include/libmount,
265 /usr/include/libsmartcols,
266 /usr/include/uuid,
267 /usr/share/doc/util-linux-&util-linux-version;,
268 and /var/lib/hwclock</seg>
[ddd5542]269 </seglistitem>
270 </segmentedlist>
271
272 <variablelist>
273 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
274 <?dbfo list-presentation="list"?>
275 <?dbhtml list-presentation="table"?>
276
[5c92d21]277 <varlistentry id="addpart">
278 <term><command>addpart</command></term>
279 <listitem>
280 <para>Informs the Linux kernel of new partitions</para>
[e1428f3]281 <indexterm zone="ch-system-util-linux addpart">
[5c92d21]282 <primary sortas="b-addpart">addpart</primary>
283 </indexterm>
284 </listitem>
285 </varlistentry>
286
[ddd5542]287 <varlistentry id="agetty">
288 <term><command>agetty</command></term>
289 <listitem>
290 <para>Opens a tty port, prompts for a login name,
291 and then invokes the <command>login</command> program</para>
[e1428f3]292 <indexterm zone="ch-system-util-linux agetty">
[ddd5542]293 <primary sortas="b-agetty">agetty</primary>
294 </indexterm>
295 </listitem>
296 </varlistentry>
297
[f6b1d91]298 <varlistentry id="blkdiscard">
299 <term><command>blkdiscard</command></term>
300 <listitem>
301 <para>Discards sectors on a device</para>
302 <indexterm zone="ch-system-util-linux blkdiscard">
303 <primary sortas="b-blkdiscard">blkdiscard</primary>
304 </indexterm>
305 </listitem>
306 </varlistentry>
307
[cd82ee5]308 <varlistentry id="blkid">
309 <term><command>blkid</command></term>
310 <listitem>
311 <para>A command line utility to locate and print block device
312 attributes</para>
[e1428f3]313 <indexterm zone="ch-system-util-linux blkid">
[cd82ee5]314 <primary sortas="b-blkid">blkid</primary>
315 </indexterm>
316 </listitem>
317 </varlistentry>
318
[78cc3be]319 <varlistentry id="blkzone">
320 <term><command>blkzone</command></term>
321 <listitem>
322 <para>Runs zone command on the given block device</para>
323 <indexterm zone="ch-system-util-linux blkzone">
324 <primary sortas="b-blkzone">blkzone</primary>
325 </indexterm>
326 </listitem>
327 </varlistentry>
328
[ddd5542]329 <varlistentry id="blockdev">
330 <term><command>blockdev</command></term>
331 <listitem>
332 <para>Allows users to call block device ioctls from the command
333 line</para>
[e1428f3]334 <indexterm zone="ch-system-util-linux blockdev">
[ddd5542]335 <primary sortas="b-blockdev">blockdev</primary>
336 </indexterm>
337 </listitem>
338 </varlistentry>
339
340 <varlistentry id="cal">
341 <term><command>cal</command></term>
342 <listitem>
343 <para>Displays a simple calendar</para>
[e1428f3]344 <indexterm zone="ch-system-util-linux cal">
[ddd5542]345 <primary sortas="b-cal">cal</primary>
346 </indexterm>
347 </listitem>
348 </varlistentry>
349
350 <varlistentry id="cfdisk">
351 <term><command>cfdisk</command></term>
352 <listitem>
353 <para>Manipulates the partition table of the given device</para>
[e1428f3]354 <indexterm zone="ch-system-util-linux cfdisk">
[ddd5542]355 <primary sortas="b-cfdisk">cfdisk</primary>
356 </indexterm>
357 </listitem>
358 </varlistentry>
359
[0c90d60]360 <varlistentry id="chcpu">
361 <term><command>chcpu</command></term>
362 <listitem>
363 <para>Modifies the state of CPUs</para>
364 <indexterm zone="ch-system-util-linux chcpu">
365 <primary sortas="b-chcpu">chcpu</primary>
366 </indexterm>
367 </listitem>
368 </varlistentry>
[faaac5c]369
[78cc3be]370 <varlistentry id="chmem">
371 <term><command>chmem</command></term>
372 <listitem>
373 <para>Configures memory</para>
374 <indexterm zone="ch-system-util-linux chmem">
375 <primary sortas="b-chmem">chmem</primary>
376 </indexterm>
377 </listitem>
378 </varlistentry>
379
[faaac5c]380 <varlistentry id="choom">
381 <term><command>choom</command></term>
382 <listitem>
383 <para>Displays and adjusts OOM-killer score</para>
384 <indexterm zone="ch-system-util-linux choom">
385 <primary sortas="b-choom">choom</primary>
386 </indexterm>
387 </listitem>
388 </varlistentry>
[0c90d60]389
[5c92d21]390 <varlistentry id="chrt">
391 <term><command>chrt</command></term>
392 <listitem>
393 <para>Manipulates real-time attributes of a process</para>
[e1428f3]394 <indexterm zone="ch-system-util-linux chrt">
[5c92d21]395 <primary sortas="b-chrt">chrt</primary>
396 </indexterm>
397 </listitem>
398 </varlistentry>
399
[ddd5542]400 <varlistentry id="col">
401 <term><command>col</command></term>
402 <listitem>
403 <para>Filters out reverse line feeds</para>
[e1428f3]404 <indexterm zone="ch-system-util-linux col">
[ddd5542]405 <primary sortas="b-col">col</primary>
406 </indexterm>
407 </listitem>
408 </varlistentry>
409
410 <varlistentry id="colcrt">
411 <term><command>colcrt</command></term>
412 <listitem>
413 <para>Filters <command>nroff</command> output for terminals
414 that lack some capabilities, such as overstriking and half-lines</para>
[e1428f3]415 <indexterm zone="ch-system-util-linux colcrt">
[ddd5542]416 <primary sortas="b-colcrt">colcrt</primary>
417 </indexterm>
418 </listitem>
419 </varlistentry>
420
421 <varlistentry id="colrm">
422 <term><command>colrm</command></term>
423 <listitem>
424 <para>Filters out the given columns</para>
[e1428f3]425 <indexterm zone="ch-system-util-linux colrm">
[ddd5542]426 <primary sortas="b-colrm">colrm</primary>
427 </indexterm>
428 </listitem>
429 </varlistentry>
430
431 <varlistentry id="column">
432 <term><command>column</command></term>
433 <listitem>
434 <para>Formats a given file into multiple columns</para>
[e1428f3]435 <indexterm zone="ch-system-util-linux column">
[ddd5542]436 <primary sortas="b-column">column</primary>
437 </indexterm>
438 </listitem>
439 </varlistentry>
440
441 <varlistentry id="ctrlaltdel">
442 <term><command>ctrlaltdel</command></term>
443 <listitem>
444 <para>Sets the function of the Ctrl+Alt+Del key combination to a
445 hard or a soft reset</para>
[e1428f3]446 <indexterm zone="ch-system-util-linux ctrlaltdel">
[ddd5542]447 <primary sortas="b-ctrlaltdel">ctrlaltdel</primary>
448 </indexterm>
449 </listitem>
450 </varlistentry>
451
[5c92d21]452 <varlistentry id="delpart">
453 <term><command>delpart</command></term>
[ddd5542]454 <listitem>
[5c92d21]455 <para>Asks the Linux kernel to remove a partition</para>
[e1428f3]456 <indexterm zone="ch-system-util-linux delpart">
[5c92d21]457 <primary sortas="b-delpart">delpart</primary>
[ddd5542]458 </indexterm>
459 </listitem>
460 </varlistentry>
461
[5c92d21]462 <varlistentry id="dmesg">
463 <term><command>dmesg</command></term>
[ddd5542]464 <listitem>
[5c92d21]465 <para>Dumps the kernel boot messages</para>
[e1428f3]466 <indexterm zone="ch-system-util-linux dmesg">
[5c92d21]467 <primary sortas="b-dmesg">dmesg</primary>
[ddd5542]468 </indexterm>
469 </listitem>
470 </varlistentry>
471
[ca101ad]472 <varlistentry id="eject">
473 <term><command>eject</command></term>
474 <listitem>
475 <para>Ejects removable media</para>
476 <indexterm zone="ch-system-util-linux eject">
477 <primary sortas="b-eject">eject</primary>
478 </indexterm>
479 </listitem>
480 </varlistentry>
481
[9d42ad9]482 <varlistentry id="fallocate">
483 <term><command>fallocate</command></term>
484 <listitem>
485 <para>Preallocates space to a file</para>
[e1428f3]486 <indexterm zone="ch-system-util-linux fallocate">
[9d42ad9]487 <primary sortas="b-fallocate">fallocate</primary>
488 </indexterm>
489 </listitem>
490 </varlistentry>
491
[ddd5542]492 <varlistentry id="fdformat">
493 <term><command>fdformat</command></term>
494 <listitem>
495 <para>Low-level formats a floppy disk</para>
[e1428f3]496 <indexterm zone="ch-system-util-linux fdformat">
[ddd5542]497 <primary sortas="b-fdformat">fdformat</primary>
498 </indexterm>
499 </listitem>
500 </varlistentry>
501
[2791a8e]502 <varlistentry id="fdisk">
503 <term><command>fdisk</command></term>
504 <listitem>
[edbeeb5]505 <para>Manipulates the partition table of the given device</para>
[e1428f3]506 <indexterm zone="ch-system-util-linux fdisk">
[2791a8e]507 <primary sortas="b-fdisk">fdisk</primary>
508 </indexterm>
509 </listitem>
510 </varlistentry>
511
[78cc3be]512 <varlistentry id="fincore">
513 <term><command>fincore</command></term>
514 <listitem>
515 <para>Counts pages of file contents in core</para>
516 <indexterm zone="ch-system-util-linux fincore">
517 <primary sortas="b-fincore">fincore</primary>
518 </indexterm>
519 </listitem>
520 </varlistentry>
521
[cd82ee5]522 <varlistentry id="findfs">
523 <term><command>findfs</command></term>
524 <listitem>
525 <para>Finds a file system by label or Universally Unique Identifier
526 (UUID)</para>
[e1428f3]527 <indexterm zone="ch-system-util-linux findfs">
[cd82ee5]528 <primary sortas="b-findfs">findfs</primary>
529 </indexterm>
530 </listitem>
531 </varlistentry>
532
[6541b70]533 <varlistentry id="findmnt">
534 <term><command>findmnt</command></term>
535 <listitem>
[2ca8941]536 <para>Is a command line interface to the libmount library
[6541b70]537 for work with mountinfo, fstab and mtab files</para>
[e1428f3]538 <indexterm zone="ch-system-util-linux findmnt">
[6541b70]539 <primary sortas="b-findmnt">findmnt</primary>
540 </indexterm>
541 </listitem>
542 </varlistentry>
543
[8bc46a5]544 <varlistentry id="flock">
545 <term><command>flock</command></term>
546 <listitem>
547 <para>Acquires a file lock and then executes a command with the lock
548 held</para>
[e1428f3]549 <indexterm zone="ch-system-util-linux flock">
[a2add74]550 <primary sortas="b-flock">flock</primary>
[8bc46a5]551 </indexterm>
552 </listitem>
553 </varlistentry>
554
[cd82ee5]555 <varlistentry id="fsck">
556 <term><command>fsck</command></term>
557 <listitem>
558 <para>Is used to check, and optionally repair, file systems</para>
[e1428f3]559 <indexterm zone="ch-system-util-linux fsck">
[cd82ee5]560 <primary sortas="b-fsck">fsck</primary>
561 </indexterm>
562 </listitem>
563 </varlistentry>
564
[ddd5542]565 <varlistentry id="fsck.cramfs">
566 <term><command>fsck.cramfs</command></term>
567 <listitem>
568 <para>Performs a consistency check on the Cramfs file system on the
569 given device</para>
[e1428f3]570 <indexterm zone="ch-system-util-linux fsck.cramfs">
[ddd5542]571 <primary sortas="b-fsck.cramfs">fsck.cramfs</primary>
572 </indexterm>
573 </listitem>
574 </varlistentry>
575
576 <varlistentry id="fsck.minix">
577 <term><command>fsck.minix</command></term>
578 <listitem>
579 <para>Performs a consistency check on the Minix file system on the
580 given device</para>
[e1428f3]581 <indexterm zone="ch-system-util-linux fsck.minix">
[ddd5542]582 <primary sortas="b-fsck.minix">fsck.minix</primary>
583 </indexterm>
584 </listitem>
585 </varlistentry>
586
[6541b70]587 <varlistentry id="fsfreeze">
588 <term><command>fsfreeze</command></term>
589 <listitem>
[2ca8941]590 <para>Is a very simple wrapper around FIFREEZE/FITHAW ioctl
[6541b70]591 kernel driver operations</para>
[e1428f3]592 <indexterm zone="ch-system-util-linux fsfreeze">
[6541b70]593 <primary sortas="b-fsfreeze">fsfreeze</primary>
594 </indexterm>
595 </listitem>
596 </varlistentry>
597
[e1428f3]598 <varlistentry id="fstrim">
599 <term><command>fstrim</command></term>
600 <listitem>
601 <para>Discards unused blocks on a mounted filesystem</para>
602 <indexterm zone="ch-system-util-linux fstrim">
603 <primary sortas="b-fstrim">fstrim</primary>
604 </indexterm>
605 </listitem>
606 </varlistentry>
607
[ddd5542]608 <varlistentry id="getopt">
609 <term><command>getopt</command></term>
610 <listitem>
611 <para>Parses options in the given command line</para>
[e1428f3]612 <indexterm zone="ch-system-util-linux getopt">
[ddd5542]613 <primary sortas="b-getopt">getopt</primary>
614 </indexterm>
615 </listitem>
616 </varlistentry>
617
618 <varlistentry id="hexdump">
619 <term><command>hexdump</command></term>
620 <listitem>
621 <para>Dumps the given file in hexadecimal or in another given
622 format</para>
[e1428f3]623 <indexterm zone="ch-system-util-linux hexdump">
[ddd5542]624 <primary sortas="b-hexdump">hexdump</primary>
625 </indexterm>
626 </listitem>
627 </varlistentry>
628
629 <varlistentry id="hwclock">
630 <term><command>hwclock</command></term>
631 <listitem>
632 <para>Reads or sets the system's hardware clock, also called
633 the Real-Time Clock (RTC) or Basic Input-Output System (BIOS)
634 clock</para>
[e1428f3]635 <indexterm zone="ch-system-util-linux hwclock">
[ddd5542]636 <primary sortas="b-hwclock">hwclock</primary>
637 </indexterm>
638 </listitem>
639 </varlistentry>
640
[db2f21e]641 <varlistentry id="i386">
642 <term><command>i386</command></term>
643 <listitem>
644 <para>A symbolic link to setarch</para>
[e1428f3]645 <indexterm zone="ch-system-util-linux i386">
[db2f21e]646 <primary sortas="b-i386">i386</primary>
647 </indexterm>
648 </listitem>
649 </varlistentry>
650
[5c92d21]651 <varlistentry id="ionice">
652 <term><command>ionice</command></term>
653 <listitem>
654 <para>Gets or sets the io scheduling class and priority for a program</para>
[e1428f3]655 <indexterm zone="ch-system-util-linux ionice">
[5c92d21]656 <primary sortas="b-ionice">ionice</primary>
657 </indexterm>
658 </listitem>
659 </varlistentry>
660
[cd82ee5]661 <varlistentry id="ipcmk">
662 <term><command>ipcmk</command></term>
663 <listitem>
664 <para>Creates various IPC resources</para>
[e1428f3]665 <indexterm zone="ch-system-util-linux ipcmk">
[cd82ee5]666 <primary sortas="b-ipcmk">ipcmk</primary>
667 </indexterm>
668 </listitem>
669 </varlistentry>
670
[ddd5542]671 <varlistentry id="ipcrm">
672 <term><command>ipcrm</command></term>
673 <listitem>
674 <para>Removes the given Inter-Process Communication (IPC) resource</para>
[e1428f3]675 <indexterm zone="ch-system-util-linux ipcrm">
[ddd5542]676 <primary sortas="b-ipcrm">ipcrm</primary>
677 </indexterm>
678 </listitem>
679 </varlistentry>
680
681 <varlistentry id="ipcs">
682 <term><command>ipcs</command></term>
683 <listitem>
684 <para>Provides IPC status information</para>
[e1428f3]685 <indexterm zone="ch-system-util-linux ipcs">
[ddd5542]686 <primary sortas="b-ipcs">ipcs</primary>
687 </indexterm>
688 </listitem>
689 </varlistentry>
690
691 <varlistentry id="isosize">
692 <term><command>isosize</command></term>
693 <listitem>
694 <para>Reports the size of an iso9660 file system</para>
[e1428f3]695 <indexterm zone="ch-system-util-linux isosize">
[ddd5542]696 <primary sortas="b-isosize">isosize</primary>
697 </indexterm>
698 </listitem>
699 </varlistentry>
700
[d9aaf3d]701 <varlistentry id="kill">
702 <term><command>kill</command></term>
703 <listitem>
704 <para>Sends signals to processes</para>
705 <indexterm zone="ch-system-util-linux kill">
706 <primary sortas="b-kill">kill</primary>
707 </indexterm>
708 </listitem>
709 </varlistentry>
710
[4783efe]711 <varlistentry id="last">
712 <term><command>last</command></term>
713 <listitem>
714 <para>Shows which users last logged in (and out), searching back
715 through the <filename>/var/log/wtmp</filename> file; it also shows
716 system boots, shutdowns, and run-level changes</para>
717 <indexterm zone="ch-system-util-linux last">
718 <primary sortas="b-last">last</primary>
719 </indexterm>
720 </listitem>
721 </varlistentry>
722
723 <varlistentry id="lastb">
724 <term><command>lastb</command></term>
725 <listitem>
726 <para>Shows the failed login attempts, as logged in
727 <filename>/var/log/btmp</filename></para>
728 <indexterm zone="ch-system-util-linux lastb">
729 <primary sortas="b-lastb">lastb</primary>
730 </indexterm>
731 </listitem>
732 </varlistentry>
733
[5c92d21]734 <varlistentry id="ldattach">
735 <term><command>ldattach</command></term>
736 <listitem>
737 <para>Attaches a line discipline to a serial line</para>
[e1428f3]738 <indexterm zone="ch-system-util-linux ldattach">
[5c92d21]739 <primary sortas="b-ldattach">ldattach</primary>
740 </indexterm>
741 </listitem>
742 </varlistentry>
743
[db2f21e]744 <varlistentry id="linux32">
745 <term><command>linux32</command></term>
746 <listitem>
747 <para>A symbolic link to setarch</para>
[e1428f3]748 <indexterm zone="ch-system-util-linux linux32">
[db2f21e]749 <primary sortas="b-linux32">linux32</primary>
750 </indexterm>
751 </listitem>
752 </varlistentry>
753
754 <varlistentry id="linux64">
755 <term><command>linux64</command></term>
756 <listitem>
757 <para>A symbolic link to setarch</para>
[e1428f3]758 <indexterm zone="ch-system-util-linux linux64">
[db2f21e]759 <primary sortas="b-linux64">linux64</primary>
760 </indexterm>
761 </listitem>
762 </varlistentry>
763
[ddd5542]764 <varlistentry id="logger">
765 <term><command>logger</command></term>
766 <listitem>
767 <para>Enters the given message into the system log</para>
[e1428f3]768 <indexterm zone="ch-system-util-linux logger">
[ddd5542]769 <primary sortas="b-logger">logger</primary>
770 </indexterm>
771 </listitem>
772 </varlistentry>
773
774 <varlistentry id="look">
775 <term><command>look</command></term>
776 <listitem>
777 <para>Displays lines that begin with the given string</para>
[e1428f3]778 <indexterm zone="ch-system-util-linux look">
[ddd5542]779 <primary sortas="b-look">look</primary>
780 </indexterm>
781 </listitem>
782 </varlistentry>
783
784 <varlistentry id="losetup">
785 <term><command>losetup</command></term>
786 <listitem>
787 <para>Sets up and controls loop devices</para>
[e1428f3]788 <indexterm zone="ch-system-util-linux losetup">
[ddd5542]789 <primary sortas="b-losetup">losetup</primary>
790 </indexterm>
791 </listitem>
792 </varlistentry>
793
[e1428f3]794 <varlistentry id="lsblk">
795 <term><command>lsblk</command></term>
796 <listitem>
797 <para>Lists information about all or selected block devices in
[afba93b]798 a tree-like format</para>
[e1428f3]799 <indexterm zone="ch-system-util-linux lsblk">
800 <primary sortas="b-lsblk">lsblk</primary>
801 </indexterm>
802 </listitem>
803 </varlistentry>
804
[cd82ee5]805 <varlistentry id="lscpu">
806 <term><command>lscpu</command></term>
807 <listitem>
[cb02946]808 <para>Prints CPU architecture information</para>
[e1428f3]809 <indexterm zone="ch-system-util-linux lscpu">
[cd82ee5]810 <primary sortas="b-lscpu">lscpu</primary>
811 </indexterm>
812 </listitem>
813 </varlistentry>
814
[040ecb6]815 <varlistentry id="lsipc">
816 <term><command>lsipc</command></term>
817 <listitem>
818 <para>Prints information on IPC facilities currently employed
819 in the system</para>
820 <indexterm zone="ch-system-util-linux lsipc">
821 <primary sortas="b-lsipc">lsipc</primary>
822 </indexterm>
823 </listitem>
824 </varlistentry>
825
[ca101ad]826 <varlistentry id="lslocks">
827 <term><command>lslocks</command></term>
828 <listitem>
829 <para>Lists local system locks</para>
830 <indexterm zone="ch-system-util-linux lslocks">
831 <primary sortas="b-lslocks">lslocks</primary>
832 </indexterm>
833 </listitem>
834 </varlistentry>
835
[14109e7]836 <varlistentry id="lslogins">
837 <term><command>lslogins</command></term>
838 <listitem>
839 <para>Lists information about users, groups and system accounts</para>
840 <indexterm zone="ch-system-util-linux lslogins">
841 <primary sortas="b-lslogins">lslogins</primary>
842 </indexterm>
843 </listitem>
844 </varlistentry>
845
[78cc3be]846 <varlistentry id="lsmem">
847 <term><command>lsmem</command></term>
848 <listitem>
849 <para>Lists the ranges of available memory with their online
850 status</para>
851 <indexterm zone="ch-system-util-linux lsmem">
852 <primary sortas="b-lsmem">lsmem</primary>
853 </indexterm>
854 </listitem>
855 </varlistentry>
856
857 <varlistentry id="lsns">
858 <term><command>lsns</command></term>
859 <listitem>
860 <para>Lists namespaces</para>
861 <indexterm zone="ch-system-util-linux lsns">
862 <primary sortas="b-lsns">lsns</primary>
863 </indexterm>
864 </listitem>
865 </varlistentry>
866
[ddd5542]867 <varlistentry id="mcookie">
868 <term><command>mcookie</command></term>
869 <listitem>
870 <para>Generates magic cookies (128-bit random hexadecimal numbers) for
871 <command>xauth</command></para>
[e1428f3]872 <indexterm zone="ch-system-util-linux mcookie">
[ddd5542]873 <primary sortas="b-mcookie">mcookie</primary>
874 </indexterm>
875 </listitem>
876 </varlistentry>
877
[4783efe]878 <varlistentry id="mesg">
879 <term><command>mesg</command></term>
880 <listitem>
881 <para>Controls whether other users can send messages to the current
882 user's terminal</para>
883 <indexterm zone="ch-system-util-linux mesg">
884 <primary sortas="b-mesg">mesg</primary>
885 </indexterm>
886 </listitem>
887 </varlistentry>
888
[ddd5542]889 <varlistentry id="mkfs">
890 <term><command>mkfs</command></term>
891 <listitem>
892 <para>Builds a file system on a device (usually a hard disk
893 partition)</para>
[e1428f3]894 <indexterm zone="ch-system-util-linux mkfs">
[ddd5542]895 <primary sortas="b-mkfs">mkfs</primary>
896 </indexterm>
897 </listitem>
898 </varlistentry>
899
900 <varlistentry id="mkfs.bfs">
901 <term><command>mkfs.bfs</command></term>
902 <listitem>
903 <para>Creates a Santa Cruz Operations (SCO) bfs file system</para>
[e1428f3]904 <indexterm zone="ch-system-util-linux mkfs.bfs">
[ddd5542]905 <primary sortas="b-mkfs.bfs">mkfs.bfs</primary>
906 </indexterm>
907 </listitem>
908 </varlistentry>
909
910 <varlistentry id="mkfs.cramfs">
911 <term><command>mkfs.cramfs</command></term>
912 <listitem>
913 <para>Creates a cramfs file system</para>
[e1428f3]914 <indexterm zone="ch-system-util-linux mkfs.cramfs">
[ddd5542]915 <primary sortas="b-mkfs.cramfs">mkfs.cramfs</primary>
916 </indexterm>
917 </listitem>
918 </varlistentry>
919
920 <varlistentry id="mkfs.minix">
921 <term><command>mkfs.minix</command></term>
922 <listitem>
923 <para>Creates a Minix file system</para>
[e1428f3]924 <indexterm zone="ch-system-util-linux mkfs.minix">
[ddd5542]925 <primary sortas="b-mkfs.minix">mkfs.minix</primary>
926 </indexterm>
927 </listitem>
928 </varlistentry>
929
930 <varlistentry id="mkswap">
931 <term><command>mkswap</command></term>
932 <listitem>
933 <para>Initializes the given device or file to be used as a swap
934 area</para>
[e1428f3]935 <indexterm zone="ch-system-util-linux mkswap">
[ddd5542]936 <primary sortas="b-mkswap">mkswap</primary>
937 </indexterm>
938 </listitem>
939 </varlistentry>
940
941 <varlistentry id="more">
942 <term><command>more</command></term>
943 <listitem>
944 <para>A filter for paging through text one screen at a time</para>
[e1428f3]945 <indexterm zone="ch-system-util-linux more">
[ddd5542]946 <primary sortas="b-more">more</primary>
947 </indexterm>
948 </listitem>
949 </varlistentry>
950
951 <varlistentry id="mount">
952 <term><command>mount</command></term>
953 <listitem>
954 <para>Attaches the file system on the given device to a specified
955 directory in the file-system tree</para>
[e1428f3]956 <indexterm zone="ch-system-util-linux mount">
[ddd5542]957 <primary sortas="b-mount">mount</primary>
958 </indexterm>
959 </listitem>
960 </varlistentry>
961
[eb797aa]962 <varlistentry id="mountpoint">
963 <term><command>mountpoint</command></term>
964 <listitem>
965 <para>Checks if the directory is a mountpoint</para>
966 <indexterm zone="ch-system-util-linux mountpoint">
967 <primary sortas="b-mountpoint">mountpoint</primary>
968 </indexterm>
969 </listitem>
970 </varlistentry>
971
[ddd5542]972 <varlistentry id="namei">
973 <term><command>namei</command></term>
974 <listitem>
975 <para>Shows the symbolic links in the given pathnames</para>
[e1428f3]976 <indexterm zone="ch-system-util-linux namei">
[ddd5542]977 <primary sortas="b-namei">namei</primary>
978 </indexterm>
979 </listitem>
980 </varlistentry>
981
[f6b1d91]982 <varlistentry id="nsenter">
983 <term><command>nsenter</command></term>
984 <listitem>
985 <para>Runs a program with namespaces of other processes</para>
986 <indexterm zone="ch-system-util-linux nsenter">
987 <primary sortas="b-nsenter">nsenter</primary>
988 </indexterm>
989 </listitem>
990 </varlistentry>
991
[5c92d21]992 <varlistentry id="partx">
993 <term><command>partx</command></term>
994 <listitem>
995 <para>Tells the kernel about the presence and numbering of on-disk
996 partitions</para>
[e1428f3]997 <indexterm zone="ch-system-util-linux partx">
[5c92d21]998 <primary sortas="b-partx">partx</primary>
999 </indexterm>
1000 </listitem>
1001 </varlistentry>
1002
[ddd5542]1003 <varlistentry id="pivot_root">
1004 <term><command>pivot_root</command></term>
1005 <listitem>
1006 <para>Makes the given file system the new root file system of the
1007 current process</para>
[e1428f3]1008 <indexterm zone="ch-system-util-linux pivot_root">
[ddd5542]1009 <primary sortas="b-pivot_root">pivot_root</primary>
1010 </indexterm>
1011 </listitem>
1012 </varlistentry>
1013
[0c90d60]1014 <varlistentry id="prlimit">
1015 <term><command>prlimit</command></term>
1016 <listitem>
1017 <para>Get and set a process' resource limits</para>
1018 <indexterm zone="ch-system-util-linux prlimit">
1019 <primary sortas="b-prlimit">prlimit</primary>
1020 </indexterm>
1021 </listitem>
1022 </varlistentry>
1023
1024 <varlistentry id="raw">
1025 <term><command>raw</command></term>
1026 <listitem>
1027 <para>Bind a Linux raw character device to a block device</para>
1028 <indexterm zone="ch-system-util-linux raw">
1029 <primary sortas="b-raw">raw</primary>
1030 </indexterm>
1031 </listitem>
1032 </varlistentry>
1033
[ddd5542]1034 <varlistentry id="readprofile">
1035 <term><command>readprofile</command></term>
1036 <listitem>
1037 <para>Reads kernel profiling information</para>
[e1428f3]1038 <indexterm zone="ch-system-util-linux readprofile">
[ddd5542]1039 <primary sortas="b-readprofile">readprofile</primary>
1040 </indexterm>
1041 </listitem>
1042 </varlistentry>
1043
1044 <varlistentry id="rename">
1045 <term><command>rename</command></term>
1046 <listitem>
1047 <para>Renames the given files, replacing a given string with
1048 another</para>
[e1428f3]1049 <indexterm zone="ch-system-util-linux rename">
[ddd5542]1050 <primary sortas="b-rename">rename</primary>
1051 </indexterm>
1052 </listitem>
1053 </varlistentry>
1054
1055 <varlistentry id="renice">
1056 <term><command>renice</command></term>
1057 <listitem>
1058 <para>Alters the priority of running processes</para>
[e1428f3]1059 <indexterm zone="ch-system-util-linux renice">
[ddd5542]1060 <primary sortas="b-renice">renice</primary>
1061 </indexterm>
1062 </listitem>
1063 </varlistentry>
1064
[ca101ad]1065 <varlistentry id="resizepart">
1066 <term><command>resizepart</command></term>
1067 <listitem>
1068 <para>Asks the Linux kernel to resize a partition</para>
1069 <indexterm zone="ch-system-util-linux resizepart">
1070 <primary sortas="b-resizepart">resizepart</primary>
1071 </indexterm>
1072 </listitem>
1073 </varlistentry>
1074
[ddd5542]1075 <varlistentry id="rev">
1076 <term><command>rev</command></term>
1077 <listitem>
1078 <para>Reverses the lines of a given file</para>
[e1428f3]1079 <indexterm zone="ch-system-util-linux rev">
[ddd5542]1080 <primary sortas="b-rev">rev</primary>
1081 </indexterm>
1082 </listitem>
1083 </varlistentry>
1084
[78cc3be]1085 <varlistentry id="rkfill">
1086 <term><command>rkfill</command></term>
1087 <listitem>
1088 <para>Tool for enabling and disabling wireless devices</para>
1089 <indexterm zone="ch-system-util-linux rkfill">
1090 <primary sortas="b-rkfill">rkfill</primary>
1091 </indexterm>
1092 </listitem>
1093 </varlistentry>
1094
[5c92d21]1095 <varlistentry id="rtcwake">
1096 <term><command>rtcwake</command></term>
[ddd5542]1097 <listitem>
[5c92d21]1098 <para>Used to enter a system sleep state until specified wakeup
1099 time</para>
[e1428f3]1100 <indexterm zone="ch-system-util-linux rtcwake">
[5c92d21]1101 <primary sortas="b-rtcwake">rtcwake</primary>
[ddd5542]1102 </indexterm>
1103 </listitem>
1104 </varlistentry>
1105
1106 <varlistentry id="script">
1107 <term><command>script</command></term>
1108 <listitem>
1109 <para>Makes a typescript of a terminal session</para>
[e1428f3]1110 <indexterm zone="ch-system-util-linux script">
[ddd5542]1111 <primary sortas="b-script">script</primary>
1112 </indexterm>
1113 </listitem>
1114 </varlistentry>
1115
[5c92d21]1116 <varlistentry id="scriptreplay">
1117 <term><command>scriptreplay</command></term>
1118 <listitem>
1119 <para>Plays back typescripts using timing information</para>
[e1428f3]1120 <indexterm zone="ch-system-util-linux scriptreplay">
[5c92d21]1121 <primary sortas="b-scriptreplay">scriptreplay</primary>
1122 </indexterm>
1123 </listitem>
1124 </varlistentry>
1125
1126 <varlistentry id="setarch">
1127 <term><command>setarch</command></term>
[ddd5542]1128 <listitem>
[5c92d21]1129 <para>Changes reported architecture in a new program environment and
1130 sets personality flags</para>
[e1428f3]1131 <indexterm zone="ch-system-util-linux setarch">
[5c92d21]1132 <primary sortas="b-setarch">setarch</primary>
[ddd5542]1133 </indexterm>
1134 </listitem>
1135 </varlistentry>
1136
1137 <varlistentry id="setsid">
1138 <term><command>setsid</command></term>
1139 <listitem>
1140 <para>Runs the given program in a new session</para>
[e1428f3]1141 <indexterm zone="ch-system-util-linux setsid">
[ddd5542]1142 <primary sortas="b-setsid">setsid</primary>
1143 </indexterm>
1144 </listitem>
1145 </varlistentry>
1146
1147 <varlistentry id="setterm">
1148 <term><command>setterm</command></term>
1149 <listitem>
1150 <para>Sets terminal attributes</para>
[e1428f3]1151 <indexterm zone="ch-system-util-linux setterm">
[ddd5542]1152 <primary sortas="b-setterm">setterm</primary>
1153 </indexterm>
1154 </listitem>
1155 </varlistentry>
1156
1157 <varlistentry id="sfdisk">
1158 <term><command>sfdisk</command></term>
1159 <listitem>
1160 <para>A disk partition table manipulator</para>
[e1428f3]1161 <indexterm zone="ch-system-util-linux sfdisk">
[ddd5542]1162 <primary sortas="b-sfdisk">sfdisk</primary>
1163 </indexterm>
1164 </listitem>
1165 </varlistentry>
1166
[4783efe]1167 <varlistentry id="sulogin">
1168 <term><command>sulogin</command></term>
1169 <listitem>
1170 <para>Allows <systemitem class="username">root</systemitem> to log in;
1171 it is normally invoked by <command>init</command> when the system goes
1172 into single user mode</para>
1173 <indexterm zone="ch-system-util-linux sulogin">
1174 <primary sortas="b-sulogin">sulogin</primary>
1175 </indexterm>
1176 </listitem>
1177 </varlistentry>
1178
[6541b70]1179 <varlistentry id="swaplabel">
1180 <term><command>swaplabel</command></term>
1181 <listitem>
1182 <para>Allows to change swaparea UUID and label</para>
[e1428f3]1183 <indexterm zone="ch-system-util-linux swaplabel">
[6541b70]1184 <primary sortas="b-swaplabel">swaplabel</primary>
1185 </indexterm>
1186 </listitem>
1187 </varlistentry>
1188
[90aae6b]1189 <varlistentry id="swapoff">
1190 <term><command>swapoff</command></term>
1191 <listitem>
1192 <para>Disables devices and files for paging and swapping</para>
[e1428f3]1193 <indexterm zone="ch-system-util-linux swapoff">
[90aae6b]1194 <primary sortas="b-swapoff">swapoff</primary>
1195 </indexterm>
1196 </listitem>
1197 </varlistentry>
1198
[ddd5542]1199 <varlistentry id="swapon">
1200 <term><command>swapon</command></term>
1201 <listitem>
1202 <para>Enables devices and files for paging and swapping and
1203 lists the devices and files currently in use</para>
[e1428f3]1204 <indexterm zone="ch-system-util-linux swapon">
[ddd5542]1205 <primary sortas="b-swapon">swapon</primary>
1206 </indexterm>
1207 </listitem>
1208 </varlistentry>
1209
[cd82ee5]1210 <varlistentry id="switch_root">
1211 <term><command>switch_root</command></term>
1212 <listitem>
1213 <para>Switches to another filesystem as the root of the mount tree</para>
[e1428f3]1214 <indexterm zone="ch-system-util-linux switch_root">
[cd82ee5]1215 <primary sortas="b-switch_root">switch_root</primary>
1216 </indexterm>
1217 </listitem>
1218 </varlistentry>
1219
[8bc46a5]1220 <varlistentry id="tailf">
1221 <term><command>tailf</command></term>
1222 <listitem>
[7bb9fda]1223 <para>Tracks the growth of a log file; displays the last 10 lines
[8bc46a5]1224 of a log file, then continues displaying any new entries in the
1225 log file as they are created</para>
[e1428f3]1226 <indexterm zone="ch-system-util-linux tailf">
[8bc46a5]1227 <primary sortas="b-tailf">tailf</primary>
1228 </indexterm>
1229 </listitem>
1230 </varlistentry>
1231
[5c92d21]1232 <varlistentry id="taskset">
1233 <term><command>taskset</command></term>
1234 <listitem>
1235 <para>Retrieves or sets a process' CPU affinity</para>
[e1428f3]1236 <indexterm zone="ch-system-util-linux taskset">
[5c92d21]1237 <primary sortas="b-taskset">taskset</primary>
1238 </indexterm>
1239 </listitem>
1240 </varlistentry>
1241
[ddd5542]1242 <varlistentry id="ul">
1243 <term><command>ul</command></term>
1244 <listitem>
1245 <para>A filter for translating underscores into escape sequences
1246 indicating underlining for the terminal in use</para>
[e1428f3]1247 <indexterm zone="ch-system-util-linux ul">
[ddd5542]1248 <primary sortas="b-ul">ul</primary>
1249 </indexterm>
1250 </listitem>
1251 </varlistentry>
1252
1253 <varlistentry id="umount">
1254 <term><command>umount</command></term>
1255 <listitem>
1256 <para>Disconnects a file system from the system's file tree</para>
[e1428f3]1257 <indexterm zone="ch-system-util-linux umount">
[ddd5542]1258 <primary sortas="b-umount">umount</primary>
1259 </indexterm>
1260 </listitem>
1261 </varlistentry>
1262
[040ecb6]1263 <varlistentry id="uname26">
1264 <term><command>uname26</command></term>
1265 <listitem>
1266 <para>A symbolic link to setarch</para>
1267 <indexterm zone="ch-system-util-linux uname26">
1268 <primary sortas="b-uname26">uname26</primary>
1269 </indexterm>
1270 </listitem>
1271 </varlistentry>
1272
[9d42ad9]1273 <varlistentry id="unshare">
1274 <term><command>unshare</command></term>
1275 <listitem>
1276 <para>Runs a program with some namespaces unshared from parent</para>
[e1428f3]1277 <indexterm zone="ch-system-util-linux unshare">
[9d42ad9]1278 <primary sortas="b-unshare">unshare</primary>
1279 </indexterm>
1280 </listitem>
1281 </varlistentry>
1282
[ca101ad]1283 <varlistentry id="utmpdump">
1284 <term><command>utmpdump</command></term>
1285 <listitem>
1286 <para>Displays the content of the given login file in a more
1287 user-friendly format</para>
1288 <indexterm zone="ch-system-util-linux utmpdump">
1289 <primary sortas="b-utmpdump">utmpdump</primary>
1290 </indexterm>
1291 </listitem>
1292 </varlistentry>
1293
[cd82ee5]1294 <varlistentry id="uuidd">
1295 <term><command>uuidd</command></term>
1296 <listitem>
1297 <para>A daemon used by the UUID library to generate time-based
[0d84af1]1298 UUIDs in a secure and guaranteed-unique fashion</para>
[e1428f3]1299 <indexterm zone="ch-system-util-linux uuidd">
[cd82ee5]1300 <primary sortas="b-uuidd">uuidd</primary>
1301 </indexterm>
1302 </listitem>
1303 </varlistentry>
1304
1305 <varlistentry id="uuidgen">
1306 <term><command>uuidgen</command></term>
1307 <listitem>
1308 <para>Creates new UUIDs. Each new UUID can reasonably be considered
1309 unique among all UUIDs created, on the local system and on other
1310 systems, in the past and in the future</para>
[e1428f3]1311 <indexterm zone="ch-system-util-linux uuidgen">
[cd82ee5]1312 <primary sortas="b-uuidgen">uuidgen</primary>
1313 </indexterm>
1314 </listitem>
1315 </varlistentry>
1316
[78cc3be]1317 <varlistentry id="uuidparse">
1318 <term><command>uuidparse</command></term>
1319 <listitem>
1320 <para>An utility to parse unique identifiers</para>
1321 <indexterm zone="ch-system-util-linux uuidparse">
1322 <primary sortas="b-uuidparse">uuidparse</primary>
1323 </indexterm>
1324 </listitem>
1325 </varlistentry>
1326
[5c92d21]1327 <varlistentry id="wall">
1328 <term><command>wall</command></term>
[ddd5542]1329 <listitem>
[5c92d21]1330 <para>Displays the contents of a file or, by default, its standard
1331 input, on the terminals of all currently logged in users</para>
[e1428f3]1332 <indexterm zone="ch-system-util-linux wall">
[5c92d21]1333 <primary sortas="b-wall">wall</primary>
[ddd5542]1334 </indexterm>
1335 </listitem>
1336 </varlistentry>
1337
[ca101ad]1338 <varlistentry id="wdctl">
1339 <term><command>wdctl</command></term>
1340 <listitem>
1341 <para>Shows hardware watchdog status</para>
1342 <indexterm zone="ch-system-util-linux wdctl">
1343 <primary sortas="b-wdctl">wdctl</primary>
1344 </indexterm>
1345 </listitem>
1346 </varlistentry>
1347
[ddd5542]1348 <varlistentry id="whereis">
1349 <term><command>whereis</command></term>
1350 <listitem>
1351 <para>Reports the location of the binary, source, and man page
1352 for the given command</para>
[e1428f3]1353 <indexterm zone="ch-system-util-linux whereis">
[ddd5542]1354 <primary sortas="b-whereis">whereis</primary>
1355 </indexterm>
1356 </listitem>
1357 </varlistentry>
1358
[9d42ad9]1359 <varlistentry id="wipefs">
1360 <term><command>wipefs</command></term>
1361 <listitem>
1362 <para>Wipes a filesystem signature from a device</para>
[e1428f3]1363 <indexterm zone="ch-system-util-linux wipefs">
[9d42ad9]1364 <primary sortas="b-wipefs">wipefs</primary>
1365 </indexterm>
1366 </listitem>
1367 </varlistentry>
1368
[0c90d60]1369 <varlistentry id="x86_64">
1370 <term><command>x86_64</command></term>
[ddd5542]1371 <listitem>
[0c90d60]1372 <para>A symbolic link to setarch</para>
1373 <indexterm zone="ch-system-util-linux x86_64">
1374 <primary sortas="b-x86_64">x86_64</primary>
[ddd5542]1375 </indexterm>
1376 </listitem>
1377 </varlistentry>
1378
[eb8b1c5]1379 <varlistentry id="zramctl">
1380 <term><command>zramctl</command></term>
1381 <listitem>
1382 <para>A program to set up and control zram (compressed ram disk)
1383 devices</para>
1384 <indexterm zone="ch-system-util-linux zramctl">
1385 <primary sortas="b-zramctl">zramctl</primary>
1386 </indexterm>
1387 </listitem>
1388 </varlistentry>
1389
[cd82ee5]1390 <varlistentry id="libblkid">
1391 <term><filename class="libraryfile">libblkid</filename></term>
1392 <listitem>
1393 <para>Contains routines for device identification and token
1394 extraction</para>
[e1428f3]1395 <indexterm zone="ch-system-util-linux libblkid">
[cd82ee5]1396 <primary sortas="c-libblkid">libblkid</primary>
1397 </indexterm>
1398 </listitem>
1399 </varlistentry>
1400
[eb8b1c5]1401 <varlistentry id="libfdisk">
1402 <term><filename class="libraryfile">libfdisk</filename></term>
1403 <listitem>
1404 <para>Contains routines for manipulating partition tables</para>
1405 <indexterm zone="ch-system-util-linux libfdisk">
1406 <primary sortas="c-libfdisk">libfdisk</primary>
1407 </indexterm>
1408 </listitem>
1409 </varlistentry>
1410
[12d9bda6]1411 <varlistentry id="libmount">
1412 <term><filename class="libraryfile">libmount</filename></term>
1413 <listitem>
1414 <para>Contains routines for block device mounting and
1415 unmounting</para>
1416 <indexterm zone="ch-system-util-linux libmount">
1417 <primary sortas="c-libmount">libmount</primary>
1418 </indexterm>
1419 </listitem>
1420 </varlistentry>
1421
[eb8b1c5]1422 <varlistentry id="libsmartcols">
1423 <term><filename class="libraryfile">libsmartcols</filename></term>
1424 <listitem>
1425 <para>Contains routines for aiding screen output in tabular form</para>
1426 <indexterm zone="ch-system-util-linux libsmartcols">
1427 <primary sortas="c-libsmartcols">libsmartcols</primary>
1428 </indexterm>
1429 </listitem>
1430 </varlistentry>
1431
[cd82ee5]1432 <varlistentry id="libuuid">
1433 <term><filename class="libraryfile">libuuid</filename></term>
1434 <listitem>
1435 <para>Contains routines for generating unique identifiers for objects
1436 that may be accessible beyond the local system</para>
[e1428f3]1437 <indexterm zone="ch-system-util-linux libuuid">
[cd82ee5]1438 <primary sortas="c-libuuid">libuuid</primary>
1439 </indexterm>
1440 </listitem>
1441 </varlistentry>
1442
[ddd5542]1443 </variablelist>
1444
1445 </sect2>
[673b0d8]1446
1447</sect1>
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