source: chapter08/util-linux.xml@ c53c917

multilib xry111/multilib
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[7152faa]1<?xml version="1.0" encoding="UTF-8"?>
[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>
[6dfcfecc]35 <seg>&util-linux-fin-sbu;</seg>
36 <seg>&util-linux-fin-du;</seg>
[ddd5542]37 </seglistitem>
38 </segmentedlist>
39
40 </sect2>
41
42 <sect2 role="installation">
[8d4f212]43 <title>Installation of Util-linux</title>
[ddd5542]44
[9b01d1b]45<!--
[1f20176c]46 <para>First, disable a problematic test:</para>
[0a7df4c]47
48 <screen><userinput remap="pre">sed -i '/test_mkfds/s/^/#/' tests/helpers/Makemodule.am</userinput></screen>
[9b01d1b]49-->
[4783efe]50 <para>Prepare Util-linux for compilation:</para>
[12d9bda6]51
[9b01d1b]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 \
[03682b2]67 --without-systemdsystemunitdir \
68 ADJTIME_PATH=/var/lib/hwclock/adjtime \
[89c3f71]69 --docdir=/usr/share/doc/util-linux-&util-linux-version;</userinput></screen>
[96e9f0b]70
[9b01d1b]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 \
[03682b2]85 ADJTIME_PATH=/var/lib/hwclock/adjtime \
[89c3f71]86 --docdir=/usr/share/doc/util-linux-&util-linux-version;</userinput></screen>
[1118b17]87
[96e9f0b]88 <para>The --disable and --without options prevent warnings about
[9bb4939]89 building components that either require packages not in LFS, or are
[96e9f0b]90 inconsistent with programs installed by other packages.</para>
[673b0d8]91
[ddd5542]92 <para>Compile the package:</para>
[673b0d8]93
[e990ec99]94<screen><userinput remap="make">make</userinput></screen>
[0556946]95
[e286d8db]96 <para>If desired, run the test suite as a non-&root; user:</para>
[6c4092b0]97
[38de42d]98 <warning><para>Running the test suite as the
99 <systemitem class="username">root</systemitem> user can be harmful to
[4783efe]100 your system. To run it, the CONFIG_SCSI_DEBUG option for the kernel must
[6dfcfecc]101 be available in the currently running system and must be built as a
[4783efe]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
[9bb4939]104 be run by booting into the completed LFS system and running:</para>
[6c4092b0]105
[e37764e]106<screen role="nodump"><userinput>bash tests/run.sh --srcdir=$PWD --builddir=$PWD</userinput></screen>
[6c4092b0]107 </warning>
[11d5dee]108
[9c73d911]109<screen><userinput remap="test">chown -R tester .
[8d4f212]110su tester -c "make -k check"</userinput></screen>
[673b0d8]111
[9b01d1b]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>, or
117 <option>CONFIG_CRYPTO_SHA256_SSSE3</option> if the CPU supports
118 Supplemental SSE3) enabled. In addition, the lsfd: inotify test will
119 fail if the kernel option <option>CONFIG_NETLINK_DIAG</option> is not
120 enabled.
121 </para>
[676f0fd]122
[0b8bbee]123 <para>Install the package:</para>
124
[4bac71c]125<screen><userinput remap="install">make install</userinput></screen>
[ff96923]126<!--
[7fe99c2]127 <para>Finally, install the man pages:</para>
128
[ff96923]129<screen><userinput remap="install">tar -xf ../util-linux-man-pages-&util-linux-version;.tar.xz - -directory /usr/share/man - -strip-components=1</userinput></screen>
130-->
[b3f1ebb3]131 </sect2>
132
[6dfcfecc]133 <!-- - - - - - - - - - -->
134 <!-- Multilib - 32bit -->
135 <!-- - - - - - - - - - -->
[fd48baa]136
137 <sect2 arch="ml_32,ml_all" role="installation">
[b3f1ebb3]138 <title>Installation of Util-linux - 32-bit</title>
139
140 <para>Clean previous build:</para>
141
142<screen><userinput remap="pre">make distclean</userinput></screen>
143
[a08b5f0]144 <para>Move a tool out of the way which is optionally used by
145 configure but will report invalid pathes for multilib builds.</para>
146
147<screen><userinput remap="configure">mv /usr/bin/ncursesw6-config{,.tmp}</userinput></screen>
148
[b3f1ebb3]149 <para>Prepare Util-linux for compilation:</para>
150
151<screen revision="sysv"><userinput remap="configure">CC="gcc -m32" \
152./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
[70aadfb]153 --host=i686-pc-linux-gnu \
154 --libdir=/usr/lib32 \
[ce45f8d]155 --runstatedir=/run \
156 --sbindir=/usr/sbin \
[b3f1ebb3]157 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
158 --disable-chfn-chsh \
159 --disable-login \
160 --disable-nologin \
161 --disable-su \
162 --disable-setpriv \
163 --disable-runuser \
164 --disable-pylibmount \
[ce45f8d]165 --disable-liblastlog2 \
[b3f1ebb3]166 --disable-static \
167 --without-python \
168 --without-systemd \
[a08b5f0]169 --without-systemdsystemunitdir</userinput></screen>
[b3f1ebb3]170
171<screen revision="systemd"><userinput remap="configure">CC="gcc -m32" \
172./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
[70aadfb]173 --host=i686-pc-linux-gnu \
174 --libdir=/usr/lib32 \
[ce45f8d]175 --runstatedir=/run \
176 --sbindir=/usr/sbin \
[b3f1ebb3]177 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
178 --disable-chfn-chsh \
179 --disable-login \
180 --disable-nologin \
181 --disable-su \
182 --disable-setpriv \
183 --disable-runuser \
184 --disable-pylibmount \
[ce45f8d]185 --disable-liblastlog2 \
[b3f1ebb3]186 --disable-static \
[a08b5f0]187 --without-python</userinput></screen>
188
189 <para>Restore the tool previously moved away:</para>
190
191<screen><userinput remap="configure">mv /usr/bin/ncursesw6-config{.tmp,}</userinput></screen>
[b3f1ebb3]192
193 <para>Compile the package:</para>
194
195<screen><userinput remap="make">make</userinput></screen>
196
197 <para>Install the package:</para>
198
199<screen><userinput remap="install">make DESTDIR=$PWD/DESTDIR install
[0ebda11]200cp -Rv DESTDIR/usr/lib32/* /usr/lib32
[b3f1ebb3]201rm -rf DESTDIR</userinput></screen>
202
[6dfcfecc]203 </sect2><!-- m32 -->
[b3f1ebb3]204
[6dfcfecc]205 <!-- - - - - - - - - - -->
206 <!-- Multilib - x32bit -->
207 <!-- - - - - - - - - - -->
[fd48baa]208
209 <sect2 arch="ml_x32,ml_all" role="installation">
[b3f1ebb3]210 <title>Installation of Util-linux - x32-bit</title>
211
212 <para>Clean previous build:</para>
213
214<screen><userinput remap="pre">make distclean</userinput></screen>
215
[a08b5f0]216 <para>Move a tool out of the way which is optionally used by
217 configure but will report invalid pathes for multilib builds.</para>
218
219<screen><userinput remap="configure">mv /usr/bin/ncursesw6-config{,.tmp}</userinput></screen>
220
[b3f1ebb3]221 <para>Prepare Util-linux for compilation:</para>
222
223<screen revision="sysv"><userinput remap="configure">CC="gcc -mx32" \
224./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
[70aadfb]225 --host=x86_64-pc-linux-gnux32 \
[ce45f8d]226 --libdir=/usr/libx32 \
227 --runstatedir=/run \
228 --sbindir=/usr/sbin \
[b3f1ebb3]229 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
[ce45f8d]230 --disable-chfn-chsh \
231 --disable-login \
232 --disable-nologin \
233 --disable-su \
234 --disable-setpriv \
235 --disable-runuser \
236 --disable-pylibmount \
237 --disable-liblastlog2 \
238 --disable-static \
239 --without-python \
240 --without-systemd \
[a08b5f0]241 --without-systemdsystemunitdir</userinput></screen>
[b3f1ebb3]242
243<screen revision="systemd"><userinput remap="configure">CC="gcc -mx32" \
244./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
[70aadfb]245 --host=x86_64-pc-linux-gnux32 \
[ce45f8d]246 --libdir=/usr/libx32 \
247 --runstatedir=/run \
248 --sbindir=/usr/sbin \
[b3f1ebb3]249 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
[ce45f8d]250 --disable-chfn-chsh \
251 --disable-login \
252 --disable-nologin \
253 --disable-su \
254 --disable-setpriv \
255 --disable-runuser \
256 --disable-pylibmount \
257 --disable-liblastlog2 \
258 --disable-static \
[a08b5f0]259 --without-python</userinput></screen>
260
261 <para>Restore the tool previously moved away:</para>
262
263<screen><userinput remap="configure">mv /usr/bin/ncursesw6-config{.tmp,}</userinput></screen>
[b3f1ebb3]264
265 <para>Compile the package:</para>
266
267<screen><userinput remap="make">make</userinput></screen>
268
269 <para>Install the package:</para>
270
271<screen><userinput remap="install">make DESTDIR=$PWD/DESTDIR install
[0ebda11]272cp -Rv DESTDIR/usr/libx32/* /usr/libx32
[b3f1ebb3]273rm -rf DESTDIR</userinput></screen>
[673b0d8]274
[6dfcfecc]275 </sect2><!-- mx32 -->
[ddd5542]276
277 <sect2 id="contents-utillinux" role="content">
[e1428f3]278 <title>Contents of Util-linux</title>
[ddd5542]279
280 <segmentedlist>
281 <segtitle>Installed programs</segtitle>
[cd82ee5]282 <segtitle>Installed libraries</segtitle>
[fe05b08]283 <segtitle>Installed directories</segtitle>
[ddd5542]284
285 <seglistitem>
[78cc3be]286 <seg>addpart, agetty, blkdiscard, blkid, blkzone, blockdev, cal, cfdisk, chcpu,
287 chmem, choom, chrt, col, colcrt, colrm, column, ctrlaltdel, delpart, dmesg,
[50c357d3]288 eject, fallocate, fdisk, fincore, findfs, findmnt, flock, fsck,
[9bb4939]289 fsck.cramfs, fsck.minix, fsfreeze, fstrim, getopt, hardlink, hexdump, hwclock,
290 i386 (link to setarch), ionice, ipcmk, ipcrm, ipcs, irqtop, isosize, kill, last,
291 lastb (link to last), ldattach, linux32 (link to setarch), linux64 (link to setarch),
292 logger, look, losetup, lsblk, lscpu, lsipc, lsirq, lsfd, lslocks, lslogins,
293 lsmem, lsns, mcookie, mesg, mkfs, mkfs.bfs, mkfs.cramfs, mkfs.minix, mkswap,
[7b370c5]294 more, mount, mountpoint, namei, nsenter, partx, pivot_root, prlimit,
[78cc3be]295 readprofile, rename, renice, resizepart, rev, rfkill, rtcwake, script,
[50c357d3]296 scriptlive, scriptreplay, setarch, setsid, setterm, sfdisk, sulogin, swaplabel,
[9bb4939]297 swapoff, swapon, switch_root, taskset, uclampset, ul,
298 umount, uname26 (link to setarch), unshare, utmpdump, uuidd, uuidgen, uuidparse,
299 wall, wdctl, whereis, wipefs, x86_64 (link to setarch), and zramctl</seg>
[d672ab7]300 <seg>libblkid.so, libfdisk.so, libmount.so,
[040ecb6]301 libsmartcols.so, and libuuid.so</seg>
[d672ab7]302 <seg>/usr/include/blkid,
303 /usr/include/libfdisk,
304 /usr/include/libmount,
305 /usr/include/libsmartcols,
306 /usr/include/uuid,
307 /usr/share/doc/util-linux-&util-linux-version;,
[040ecb6]308 and /var/lib/hwclock</seg>
[ddd5542]309 </seglistitem>
310 </segmentedlist>
311
312 <variablelist>
313 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
314 <?dbfo list-presentation="list"?>
315 <?dbhtml list-presentation="table"?>
316
[5c92d21]317 <varlistentry id="addpart">
318 <term><command>addpart</command></term>
319 <listitem>
320 <para>Informs the Linux kernel of new partitions</para>
[e1428f3]321 <indexterm zone="ch-system-util-linux addpart">
[5c92d21]322 <primary sortas="b-addpart">addpart</primary>
323 </indexterm>
324 </listitem>
325 </varlistentry>
326
[ddd5542]327 <varlistentry id="agetty">
328 <term><command>agetty</command></term>
329 <listitem>
330 <para>Opens a tty port, prompts for a login name,
331 and then invokes the <command>login</command> program</para>
[e1428f3]332 <indexterm zone="ch-system-util-linux agetty">
[ddd5542]333 <primary sortas="b-agetty">agetty</primary>
334 </indexterm>
335 </listitem>
336 </varlistentry>
337
[f6b1d91]338 <varlistentry id="blkdiscard">
339 <term><command>blkdiscard</command></term>
340 <listitem>
341 <para>Discards sectors on a device</para>
342 <indexterm zone="ch-system-util-linux blkdiscard">
343 <primary sortas="b-blkdiscard">blkdiscard</primary>
344 </indexterm>
345 </listitem>
346 </varlistentry>
347
[cd82ee5]348 <varlistentry id="blkid">
349 <term><command>blkid</command></term>
350 <listitem>
351 <para>A command line utility to locate and print block device
352 attributes</para>
[e1428f3]353 <indexterm zone="ch-system-util-linux blkid">
[cd82ee5]354 <primary sortas="b-blkid">blkid</primary>
355 </indexterm>
356 </listitem>
357 </varlistentry>
358
[78cc3be]359 <varlistentry id="blkzone">
360 <term><command>blkzone</command></term>
361 <listitem>
[9bb4939]362 <para>Is used to manage zoned storage block devices</para>
[78cc3be]363 <indexterm zone="ch-system-util-linux blkzone">
364 <primary sortas="b-blkzone">blkzone</primary>
365 </indexterm>
366 </listitem>
367 </varlistentry>
368
[ddd5542]369 <varlistentry id="blockdev">
370 <term><command>blockdev</command></term>
371 <listitem>
372 <para>Allows users to call block device ioctls from the command
373 line</para>
[e1428f3]374 <indexterm zone="ch-system-util-linux blockdev">
[ddd5542]375 <primary sortas="b-blockdev">blockdev</primary>
376 </indexterm>
377 </listitem>
378 </varlistentry>
379
380 <varlistentry id="cal">
381 <term><command>cal</command></term>
382 <listitem>
383 <para>Displays a simple calendar</para>
[e1428f3]384 <indexterm zone="ch-system-util-linux cal">
[ddd5542]385 <primary sortas="b-cal">cal</primary>
386 </indexterm>
387 </listitem>
388 </varlistentry>
389
390 <varlistentry id="cfdisk">
391 <term><command>cfdisk</command></term>
392 <listitem>
393 <para>Manipulates the partition table of the given device</para>
[e1428f3]394 <indexterm zone="ch-system-util-linux cfdisk">
[ddd5542]395 <primary sortas="b-cfdisk">cfdisk</primary>
396 </indexterm>
397 </listitem>
398 </varlistentry>
399
[0c90d60]400 <varlistentry id="chcpu">
401 <term><command>chcpu</command></term>
402 <listitem>
403 <para>Modifies the state of CPUs</para>
404 <indexterm zone="ch-system-util-linux chcpu">
405 <primary sortas="b-chcpu">chcpu</primary>
406 </indexterm>
407 </listitem>
408 </varlistentry>
[faaac5c]409
[78cc3be]410 <varlistentry id="chmem">
411 <term><command>chmem</command></term>
412 <listitem>
413 <para>Configures memory</para>
414 <indexterm zone="ch-system-util-linux chmem">
415 <primary sortas="b-chmem">chmem</primary>
416 </indexterm>
417 </listitem>
418 </varlistentry>
419
[faaac5c]420 <varlistentry id="choom">
421 <term><command>choom</command></term>
422 <listitem>
[9bb4939]423 <para>Displays and adjusts OOM-killer scores, used to determine
424 which process to kill first when Linux is Out Of Memory</para>
[faaac5c]425 <indexterm zone="ch-system-util-linux choom">
426 <primary sortas="b-choom">choom</primary>
427 </indexterm>
428 </listitem>
429 </varlistentry>
[0c90d60]430
[5c92d21]431 <varlistentry id="chrt">
432 <term><command>chrt</command></term>
433 <listitem>
434 <para>Manipulates real-time attributes of a process</para>
[e1428f3]435 <indexterm zone="ch-system-util-linux chrt">
[5c92d21]436 <primary sortas="b-chrt">chrt</primary>
437 </indexterm>
438 </listitem>
439 </varlistentry>
440
[ddd5542]441 <varlistentry id="col">
442 <term><command>col</command></term>
443 <listitem>
444 <para>Filters out reverse line feeds</para>
[e1428f3]445 <indexterm zone="ch-system-util-linux col">
[ddd5542]446 <primary sortas="b-col">col</primary>
447 </indexterm>
448 </listitem>
449 </varlistentry>
450
451 <varlistentry id="colcrt">
452 <term><command>colcrt</command></term>
453 <listitem>
454 <para>Filters <command>nroff</command> output for terminals
455 that lack some capabilities, such as overstriking and half-lines</para>
[e1428f3]456 <indexterm zone="ch-system-util-linux colcrt">
[ddd5542]457 <primary sortas="b-colcrt">colcrt</primary>
458 </indexterm>
459 </listitem>
460 </varlistentry>
461
462 <varlistentry id="colrm">
463 <term><command>colrm</command></term>
464 <listitem>
465 <para>Filters out the given columns</para>
[e1428f3]466 <indexterm zone="ch-system-util-linux colrm">
[ddd5542]467 <primary sortas="b-colrm">colrm</primary>
468 </indexterm>
469 </listitem>
470 </varlistentry>
471
472 <varlistentry id="column">
473 <term><command>column</command></term>
474 <listitem>
475 <para>Formats a given file into multiple columns</para>
[e1428f3]476 <indexterm zone="ch-system-util-linux column">
[ddd5542]477 <primary sortas="b-column">column</primary>
478 </indexterm>
479 </listitem>
480 </varlistentry>
481
482 <varlistentry id="ctrlaltdel">
483 <term><command>ctrlaltdel</command></term>
484 <listitem>
485 <para>Sets the function of the Ctrl+Alt+Del key combination to a
486 hard or a soft reset</para>
[e1428f3]487 <indexterm zone="ch-system-util-linux ctrlaltdel">
[ddd5542]488 <primary sortas="b-ctrlaltdel">ctrlaltdel</primary>
489 </indexterm>
490 </listitem>
491 </varlistentry>
492
[5c92d21]493 <varlistentry id="delpart">
494 <term><command>delpart</command></term>
[ddd5542]495 <listitem>
[5c92d21]496 <para>Asks the Linux kernel to remove a partition</para>
[e1428f3]497 <indexterm zone="ch-system-util-linux delpart">
[5c92d21]498 <primary sortas="b-delpart">delpart</primary>
[ddd5542]499 </indexterm>
500 </listitem>
501 </varlistentry>
502
[5c92d21]503 <varlistentry id="dmesg">
504 <term><command>dmesg</command></term>
[ddd5542]505 <listitem>
[5c92d21]506 <para>Dumps the kernel boot messages</para>
[e1428f3]507 <indexterm zone="ch-system-util-linux dmesg">
[5c92d21]508 <primary sortas="b-dmesg">dmesg</primary>
[ddd5542]509 </indexterm>
510 </listitem>
511 </varlistentry>
512
[ca101ad]513 <varlistentry id="eject">
514 <term><command>eject</command></term>
515 <listitem>
516 <para>Ejects removable media</para>
517 <indexterm zone="ch-system-util-linux eject">
518 <primary sortas="b-eject">eject</primary>
519 </indexterm>
520 </listitem>
521 </varlistentry>
522
[9d42ad9]523 <varlistentry id="fallocate">
524 <term><command>fallocate</command></term>
525 <listitem>
526 <para>Preallocates space to a file</para>
[e1428f3]527 <indexterm zone="ch-system-util-linux fallocate">
[9d42ad9]528 <primary sortas="b-fallocate">fallocate</primary>
529 </indexterm>
530 </listitem>
531 </varlistentry>
532
[2791a8e]533 <varlistentry id="fdisk">
534 <term><command>fdisk</command></term>
535 <listitem>
[edbeeb5]536 <para>Manipulates the partition table of the given device</para>
[e1428f3]537 <indexterm zone="ch-system-util-linux fdisk">
[2791a8e]538 <primary sortas="b-fdisk">fdisk</primary>
539 </indexterm>
540 </listitem>
541 </varlistentry>
542
[78cc3be]543 <varlistentry id="fincore">
544 <term><command>fincore</command></term>
545 <listitem>
546 <para>Counts pages of file contents in core</para>
547 <indexterm zone="ch-system-util-linux fincore">
548 <primary sortas="b-fincore">fincore</primary>
549 </indexterm>
550 </listitem>
551 </varlistentry>
552
[cd82ee5]553 <varlistentry id="findfs">
554 <term><command>findfs</command></term>
555 <listitem>
[9bb4939]556 <para>Finds a file system, either by label or Universally Unique Identifier
[cd82ee5]557 (UUID)</para>
[e1428f3]558 <indexterm zone="ch-system-util-linux findfs">
[cd82ee5]559 <primary sortas="b-findfs">findfs</primary>
560 </indexterm>
561 </listitem>
562 </varlistentry>
563
[6541b70]564 <varlistentry id="findmnt">
565 <term><command>findmnt</command></term>
566 <listitem>
[2ca8941]567 <para>Is a command line interface to the libmount library
[9bb4939]568 for working with mountinfo, fstab and mtab files</para>
[e1428f3]569 <indexterm zone="ch-system-util-linux findmnt">
[6541b70]570 <primary sortas="b-findmnt">findmnt</primary>
571 </indexterm>
572 </listitem>
573 </varlistentry>
574
[8bc46a5]575 <varlistentry id="flock">
576 <term><command>flock</command></term>
577 <listitem>
578 <para>Acquires a file lock and then executes a command with the lock
579 held</para>
[e1428f3]580 <indexterm zone="ch-system-util-linux flock">
[a2add74]581 <primary sortas="b-flock">flock</primary>
[8bc46a5]582 </indexterm>
583 </listitem>
584 </varlistentry>
585
[cd82ee5]586 <varlistentry id="fsck">
587 <term><command>fsck</command></term>
588 <listitem>
589 <para>Is used to check, and optionally repair, file systems</para>
[e1428f3]590 <indexterm zone="ch-system-util-linux fsck">
[cd82ee5]591 <primary sortas="b-fsck">fsck</primary>
592 </indexterm>
593 </listitem>
594 </varlistentry>
595
[ddd5542]596 <varlistentry id="fsck.cramfs">
597 <term><command>fsck.cramfs</command></term>
598 <listitem>
599 <para>Performs a consistency check on the Cramfs file system on the
600 given device</para>
[e1428f3]601 <indexterm zone="ch-system-util-linux fsck.cramfs">
[ddd5542]602 <primary sortas="b-fsck.cramfs">fsck.cramfs</primary>
603 </indexterm>
604 </listitem>
605 </varlistentry>
606
607 <varlistentry id="fsck.minix">
608 <term><command>fsck.minix</command></term>
609 <listitem>
610 <para>Performs a consistency check on the Minix file system on the
611 given device</para>
[e1428f3]612 <indexterm zone="ch-system-util-linux fsck.minix">
[ddd5542]613 <primary sortas="b-fsck.minix">fsck.minix</primary>
614 </indexterm>
615 </listitem>
616 </varlistentry>
617
[6541b70]618 <varlistentry id="fsfreeze">
619 <term><command>fsfreeze</command></term>
620 <listitem>
[2ca8941]621 <para>Is a very simple wrapper around FIFREEZE/FITHAW ioctl
[6541b70]622 kernel driver operations</para>
[e1428f3]623 <indexterm zone="ch-system-util-linux fsfreeze">
[6541b70]624 <primary sortas="b-fsfreeze">fsfreeze</primary>
625 </indexterm>
626 </listitem>
627 </varlistentry>
628
[e1428f3]629 <varlistentry id="fstrim">
630 <term><command>fstrim</command></term>
631 <listitem>
632 <para>Discards unused blocks on a mounted filesystem</para>
633 <indexterm zone="ch-system-util-linux fstrim">
634 <primary sortas="b-fstrim">fstrim</primary>
635 </indexterm>
636 </listitem>
637 </varlistentry>
638
[ddd5542]639 <varlistentry id="getopt">
640 <term><command>getopt</command></term>
641 <listitem>
642 <para>Parses options in the given command line</para>
[e1428f3]643 <indexterm zone="ch-system-util-linux getopt">
[ddd5542]644 <primary sortas="b-getopt">getopt</primary>
645 </indexterm>
646 </listitem>
647 </varlistentry>
[9bb4939]648
649 <varlistentry id="hardlink">
650 <term><command>hardlink</command></term>
651 <listitem>
652 <para>Consolidates duplicate files by creating hard links</para>
653 <indexterm zone="ch-system-util-linux hardlink">
654 <primary sortas="b-hardlink">hardlink</primary>
655 </indexterm>
656 </listitem>
657 </varlistentry>
[ddd5542]658
659 <varlistentry id="hexdump">
660 <term><command>hexdump</command></term>
661 <listitem>
[9bb4939]662 <para>Dumps the given file in hexadecimal, decimal, octal,
663 or ascii</para>
[e1428f3]664 <indexterm zone="ch-system-util-linux hexdump">
[ddd5542]665 <primary sortas="b-hexdump">hexdump</primary>
666 </indexterm>
667 </listitem>
668 </varlistentry>
669
670 <varlistentry id="hwclock">
671 <term><command>hwclock</command></term>
672 <listitem>
673 <para>Reads or sets the system's hardware clock, also called
674 the Real-Time Clock (RTC) or Basic Input-Output System (BIOS)
675 clock</para>
[e1428f3]676 <indexterm zone="ch-system-util-linux hwclock">
[ddd5542]677 <primary sortas="b-hwclock">hwclock</primary>
678 </indexterm>
679 </listitem>
680 </varlistentry>
681
[db2f21e]682 <varlistentry id="i386">
683 <term><command>i386</command></term>
684 <listitem>
685 <para>A symbolic link to setarch</para>
[e1428f3]686 <indexterm zone="ch-system-util-linux i386">
[db2f21e]687 <primary sortas="b-i386">i386</primary>
688 </indexterm>
689 </listitem>
690 </varlistentry>
691
[5c92d21]692 <varlistentry id="ionice">
693 <term><command>ionice</command></term>
694 <listitem>
695 <para>Gets or sets the io scheduling class and priority for a program</para>
[e1428f3]696 <indexterm zone="ch-system-util-linux ionice">
[5c92d21]697 <primary sortas="b-ionice">ionice</primary>
698 </indexterm>
699 </listitem>
700 </varlistentry>
701
[cd82ee5]702 <varlistentry id="ipcmk">
703 <term><command>ipcmk</command></term>
704 <listitem>
705 <para>Creates various IPC resources</para>
[e1428f3]706 <indexterm zone="ch-system-util-linux ipcmk">
[cd82ee5]707 <primary sortas="b-ipcmk">ipcmk</primary>
708 </indexterm>
709 </listitem>
710 </varlistentry>
711
[ddd5542]712 <varlistentry id="ipcrm">
713 <term><command>ipcrm</command></term>
714 <listitem>
715 <para>Removes the given Inter-Process Communication (IPC) resource</para>
[e1428f3]716 <indexterm zone="ch-system-util-linux ipcrm">
[ddd5542]717 <primary sortas="b-ipcrm">ipcrm</primary>
718 </indexterm>
719 </listitem>
720 </varlistentry>
721
722 <varlistentry id="ipcs">
723 <term><command>ipcs</command></term>
724 <listitem>
725 <para>Provides IPC status information</para>
[e1428f3]726 <indexterm zone="ch-system-util-linux ipcs">
[ddd5542]727 <primary sortas="b-ipcs">ipcs</primary>
728 </indexterm>
729 </listitem>
730 </varlistentry>
731
[50c357d3]732 <varlistentry id="irqtop">
733 <term><command>irqtop</command></term>
734 <listitem>
735 <para>Displays kernel interrupt counter information in
[ea93c11]736 <ulink role='man' url='&man;top.1'>top(1)</ulink> style
737 view</para>
[50c357d3]738 <indexterm zone="ch-system-util-linux irqtop">
739 <primary sortas="b-irqtop">irqtop</primary>
740 </indexterm>
741 </listitem>
742 </varlistentry>
743
[ddd5542]744 <varlistentry id="isosize">
745 <term><command>isosize</command></term>
746 <listitem>
747 <para>Reports the size of an iso9660 file system</para>
[e1428f3]748 <indexterm zone="ch-system-util-linux isosize">
[ddd5542]749 <primary sortas="b-isosize">isosize</primary>
750 </indexterm>
751 </listitem>
752 </varlistentry>
753
[d9aaf3d]754 <varlistentry id="kill">
755 <term><command>kill</command></term>
756 <listitem>
757 <para>Sends signals to processes</para>
758 <indexterm zone="ch-system-util-linux kill">
759 <primary sortas="b-kill">kill</primary>
760 </indexterm>
761 </listitem>
762 </varlistentry>
763
[4783efe]764 <varlistentry id="last">
765 <term><command>last</command></term>
766 <listitem>
[d672ab7]767 <para>Shows which users last logged in (and out), searching back
768 through the <filename>/var/log/wtmp</filename> file; it also shows
[4783efe]769 system boots, shutdowns, and run-level changes</para>
770 <indexterm zone="ch-system-util-linux last">
771 <primary sortas="b-last">last</primary>
772 </indexterm>
773 </listitem>
774 </varlistentry>
775
776 <varlistentry id="lastb">
777 <term><command>lastb</command></term>
778 <listitem>
[d672ab7]779 <para>Shows the failed login attempts, as logged in
[4783efe]780 <filename>/var/log/btmp</filename></para>
781 <indexterm zone="ch-system-util-linux lastb">
782 <primary sortas="b-lastb">lastb</primary>
783 </indexterm>
784 </listitem>
785 </varlistentry>
786
[5c92d21]787 <varlistentry id="ldattach">
788 <term><command>ldattach</command></term>
789 <listitem>
790 <para>Attaches a line discipline to a serial line</para>
[e1428f3]791 <indexterm zone="ch-system-util-linux ldattach">
[5c92d21]792 <primary sortas="b-ldattach">ldattach</primary>
793 </indexterm>
794 </listitem>
795 </varlistentry>
796
[db2f21e]797 <varlistentry id="linux32">
798 <term><command>linux32</command></term>
799 <listitem>
800 <para>A symbolic link to setarch</para>
[e1428f3]801 <indexterm zone="ch-system-util-linux linux32">
[db2f21e]802 <primary sortas="b-linux32">linux32</primary>
803 </indexterm>
804 </listitem>
805 </varlistentry>
806
807 <varlistentry id="linux64">
808 <term><command>linux64</command></term>
809 <listitem>
810 <para>A symbolic link to setarch</para>
[e1428f3]811 <indexterm zone="ch-system-util-linux linux64">
[db2f21e]812 <primary sortas="b-linux64">linux64</primary>
813 </indexterm>
814 </listitem>
815 </varlistentry>
816
[ddd5542]817 <varlistentry id="logger">
818 <term><command>logger</command></term>
819 <listitem>
820 <para>Enters the given message into the system log</para>
[e1428f3]821 <indexterm zone="ch-system-util-linux logger">
[ddd5542]822 <primary sortas="b-logger">logger</primary>
823 </indexterm>
824 </listitem>
825 </varlistentry>
826
827 <varlistentry id="look">
828 <term><command>look</command></term>
829 <listitem>
830 <para>Displays lines that begin with the given string</para>
[e1428f3]831 <indexterm zone="ch-system-util-linux look">
[ddd5542]832 <primary sortas="b-look">look</primary>
833 </indexterm>
834 </listitem>
835 </varlistentry>
836
837 <varlistentry id="losetup">
838 <term><command>losetup</command></term>
839 <listitem>
840 <para>Sets up and controls loop devices</para>
[e1428f3]841 <indexterm zone="ch-system-util-linux losetup">
[ddd5542]842 <primary sortas="b-losetup">losetup</primary>
843 </indexterm>
844 </listitem>
845 </varlistentry>
846
[e1428f3]847 <varlistentry id="lsblk">
848 <term><command>lsblk</command></term>
849 <listitem>
850 <para>Lists information about all or selected block devices in
[afba93b]851 a tree-like format</para>
[e1428f3]852 <indexterm zone="ch-system-util-linux lsblk">
853 <primary sortas="b-lsblk">lsblk</primary>
854 </indexterm>
855 </listitem>
856 </varlistentry>
857
[cd82ee5]858 <varlistentry id="lscpu">
859 <term><command>lscpu</command></term>
860 <listitem>
[cb02946]861 <para>Prints CPU architecture information</para>
[e1428f3]862 <indexterm zone="ch-system-util-linux lscpu">
[cd82ee5]863 <primary sortas="b-lscpu">lscpu</primary>
864 </indexterm>
865 </listitem>
866 </varlistentry>
[9bb4939]867
868 <varlistentry id="lsfd">
869 <term><command>lsfd</command></term>
870 <listitem>
871 <para>Displays information about open files; replaces <command>lsof</command></para>
872 <indexterm zone="ch-system-util-linux lsfd">
873 <primary sortas="b-lsfd">lsfd</primary>
874 </indexterm>
875 </listitem>
876 </varlistentry>
[cd82ee5]877
[040ecb6]878 <varlistentry id="lsipc">
879 <term><command>lsipc</command></term>
880 <listitem>
881 <para>Prints information on IPC facilities currently employed
882 in the system</para>
883 <indexterm zone="ch-system-util-linux lsipc">
884 <primary sortas="b-lsipc">lsipc</primary>
885 </indexterm>
886 </listitem>
887 </varlistentry>
888
[50c357d3]889 <varlistentry id="lsirq">
890 <term><command>lsirq</command></term>
891 <listitem>
892 <para>Displays kernel interrupt counter information</para>
893 <indexterm zone="ch-system-util-linux lsirq">
894 <primary sortas="b-lsirq">lsirq</primary>
895 </indexterm>
896 </listitem>
897 </varlistentry>
898
[ca101ad]899 <varlistentry id="lslocks">
900 <term><command>lslocks</command></term>
901 <listitem>
902 <para>Lists local system locks</para>
903 <indexterm zone="ch-system-util-linux lslocks">
904 <primary sortas="b-lslocks">lslocks</primary>
905 </indexterm>
906 </listitem>
907 </varlistentry>
908
[14109e7]909 <varlistentry id="lslogins">
910 <term><command>lslogins</command></term>
911 <listitem>
912 <para>Lists information about users, groups and system accounts</para>
913 <indexterm zone="ch-system-util-linux lslogins">
914 <primary sortas="b-lslogins">lslogins</primary>
915 </indexterm>
916 </listitem>
917 </varlistentry>
918
[78cc3be]919 <varlistentry id="lsmem">
920 <term><command>lsmem</command></term>
921 <listitem>
922 <para>Lists the ranges of available memory with their online
923 status</para>
924 <indexterm zone="ch-system-util-linux lsmem">
925 <primary sortas="b-lsmem">lsmem</primary>
926 </indexterm>
927 </listitem>
928 </varlistentry>
929
930 <varlistentry id="lsns">
931 <term><command>lsns</command></term>
932 <listitem>
933 <para>Lists namespaces</para>
934 <indexterm zone="ch-system-util-linux lsns">
935 <primary sortas="b-lsns">lsns</primary>
936 </indexterm>
937 </listitem>
938 </varlistentry>
939
[ddd5542]940 <varlistentry id="mcookie">
941 <term><command>mcookie</command></term>
942 <listitem>
943 <para>Generates magic cookies (128-bit random hexadecimal numbers) for
944 <command>xauth</command></para>
[e1428f3]945 <indexterm zone="ch-system-util-linux mcookie">
[ddd5542]946 <primary sortas="b-mcookie">mcookie</primary>
947 </indexterm>
948 </listitem>
949 </varlistentry>
950
[4783efe]951 <varlistentry id="mesg">
952 <term><command>mesg</command></term>
953 <listitem>
[d672ab7]954 <para>Controls whether other users can send messages to the current
[4783efe]955 user's terminal</para>
956 <indexterm zone="ch-system-util-linux mesg">
957 <primary sortas="b-mesg">mesg</primary>
958 </indexterm>
959 </listitem>
960 </varlistentry>
961
[ddd5542]962 <varlistentry id="mkfs">
963 <term><command>mkfs</command></term>
964 <listitem>
965 <para>Builds a file system on a device (usually a hard disk
966 partition)</para>
[e1428f3]967 <indexterm zone="ch-system-util-linux mkfs">
[ddd5542]968 <primary sortas="b-mkfs">mkfs</primary>
969 </indexterm>
970 </listitem>
971 </varlistentry>
972
973 <varlistentry id="mkfs.bfs">
974 <term><command>mkfs.bfs</command></term>
975 <listitem>
976 <para>Creates a Santa Cruz Operations (SCO) bfs file system</para>
[e1428f3]977 <indexterm zone="ch-system-util-linux mkfs.bfs">
[ddd5542]978 <primary sortas="b-mkfs.bfs">mkfs.bfs</primary>
979 </indexterm>
980 </listitem>
981 </varlistentry>
982
983 <varlistentry id="mkfs.cramfs">
984 <term><command>mkfs.cramfs</command></term>
985 <listitem>
986 <para>Creates a cramfs file system</para>
[e1428f3]987 <indexterm zone="ch-system-util-linux mkfs.cramfs">
[ddd5542]988 <primary sortas="b-mkfs.cramfs">mkfs.cramfs</primary>
989 </indexterm>
990 </listitem>
991 </varlistentry>
992
993 <varlistentry id="mkfs.minix">
994 <term><command>mkfs.minix</command></term>
995 <listitem>
996 <para>Creates a Minix file system</para>
[e1428f3]997 <indexterm zone="ch-system-util-linux mkfs.minix">
[ddd5542]998 <primary sortas="b-mkfs.minix">mkfs.minix</primary>
999 </indexterm>
1000 </listitem>
1001 </varlistentry>
1002
1003 <varlistentry id="mkswap">
1004 <term><command>mkswap</command></term>
1005 <listitem>
1006 <para>Initializes the given device or file to be used as a swap
1007 area</para>
[e1428f3]1008 <indexterm zone="ch-system-util-linux mkswap">
[ddd5542]1009 <primary sortas="b-mkswap">mkswap</primary>
1010 </indexterm>
1011 </listitem>
1012 </varlistentry>
1013
1014 <varlistentry id="more">
1015 <term><command>more</command></term>
1016 <listitem>
1017 <para>A filter for paging through text one screen at a time</para>
[e1428f3]1018 <indexterm zone="ch-system-util-linux more">
[ddd5542]1019 <primary sortas="b-more">more</primary>
1020 </indexterm>
1021 </listitem>
1022 </varlistentry>
1023
1024 <varlistentry id="mount">
1025 <term><command>mount</command></term>
1026 <listitem>
1027 <para>Attaches the file system on the given device to a specified
1028 directory in the file-system tree</para>
[e1428f3]1029 <indexterm zone="ch-system-util-linux mount">
[ddd5542]1030 <primary sortas="b-mount">mount</primary>
1031 </indexterm>
1032 </listitem>
1033 </varlistentry>
1034
[eb797aa]1035 <varlistentry id="mountpoint">
1036 <term><command>mountpoint</command></term>
1037 <listitem>
1038 <para>Checks if the directory is a mountpoint</para>
1039 <indexterm zone="ch-system-util-linux mountpoint">
1040 <primary sortas="b-mountpoint">mountpoint</primary>
1041 </indexterm>
1042 </listitem>
1043 </varlistentry>
1044
[ddd5542]1045 <varlistentry id="namei">
1046 <term><command>namei</command></term>
1047 <listitem>
[9bb4939]1048 <para>Shows the symbolic links in the given paths</para>
[e1428f3]1049 <indexterm zone="ch-system-util-linux namei">
[ddd5542]1050 <primary sortas="b-namei">namei</primary>
1051 </indexterm>
1052 </listitem>
1053 </varlistentry>
1054
[f6b1d91]1055 <varlistentry id="nsenter">
1056 <term><command>nsenter</command></term>
1057 <listitem>
1058 <para>Runs a program with namespaces of other processes</para>
1059 <indexterm zone="ch-system-util-linux nsenter">
1060 <primary sortas="b-nsenter">nsenter</primary>
1061 </indexterm>
1062 </listitem>
1063 </varlistentry>
1064
[5c92d21]1065 <varlistentry id="partx">
1066 <term><command>partx</command></term>
1067 <listitem>
1068 <para>Tells the kernel about the presence and numbering of on-disk
1069 partitions</para>
[e1428f3]1070 <indexterm zone="ch-system-util-linux partx">
[5c92d21]1071 <primary sortas="b-partx">partx</primary>
1072 </indexterm>
1073 </listitem>
1074 </varlistentry>
1075
[ddd5542]1076 <varlistentry id="pivot_root">
1077 <term><command>pivot_root</command></term>
1078 <listitem>
1079 <para>Makes the given file system the new root file system of the
1080 current process</para>
[e1428f3]1081 <indexterm zone="ch-system-util-linux pivot_root">
[ddd5542]1082 <primary sortas="b-pivot_root">pivot_root</primary>
1083 </indexterm>
1084 </listitem>
1085 </varlistentry>
1086
[0c90d60]1087 <varlistentry id="prlimit">
1088 <term><command>prlimit</command></term>
1089 <listitem>
[9bb4939]1090 <para>Gets and sets a process's resource limits</para>
[0c90d60]1091 <indexterm zone="ch-system-util-linux prlimit">
1092 <primary sortas="b-prlimit">prlimit</primary>
1093 </indexterm>
1094 </listitem>
1095 </varlistentry>
1096
[ddd5542]1097 <varlistentry id="readprofile">
1098 <term><command>readprofile</command></term>
1099 <listitem>
1100 <para>Reads kernel profiling information</para>
[e1428f3]1101 <indexterm zone="ch-system-util-linux readprofile">
[ddd5542]1102 <primary sortas="b-readprofile">readprofile</primary>
1103 </indexterm>
1104 </listitem>
1105 </varlistentry>
1106
1107 <varlistentry id="rename">
1108 <term><command>rename</command></term>
1109 <listitem>
1110 <para>Renames the given files, replacing a given string with
1111 another</para>
[e1428f3]1112 <indexterm zone="ch-system-util-linux rename">
[ddd5542]1113 <primary sortas="b-rename">rename</primary>
1114 </indexterm>
1115 </listitem>
1116 </varlistentry>
1117
1118 <varlistentry id="renice">
1119 <term><command>renice</command></term>
1120 <listitem>
1121 <para>Alters the priority of running processes</para>
[e1428f3]1122 <indexterm zone="ch-system-util-linux renice">
[ddd5542]1123 <primary sortas="b-renice">renice</primary>
1124 </indexterm>
1125 </listitem>
1126 </varlistentry>
1127
[ca101ad]1128 <varlistentry id="resizepart">
1129 <term><command>resizepart</command></term>
1130 <listitem>
1131 <para>Asks the Linux kernel to resize a partition</para>
1132 <indexterm zone="ch-system-util-linux resizepart">
1133 <primary sortas="b-resizepart">resizepart</primary>
1134 </indexterm>
1135 </listitem>
1136 </varlistentry>
1137
[ddd5542]1138 <varlistentry id="rev">
1139 <term><command>rev</command></term>
1140 <listitem>
1141 <para>Reverses the lines of a given file</para>
[e1428f3]1142 <indexterm zone="ch-system-util-linux rev">
[ddd5542]1143 <primary sortas="b-rev">rev</primary>
1144 </indexterm>
1145 </listitem>
1146 </varlistentry>
1147
[d765208]1148 <varlistentry id="rfkill">
1149 <term><command>rfkill</command></term>
[78cc3be]1150 <listitem>
1151 <para>Tool for enabling and disabling wireless devices</para>
[d765208]1152 <indexterm zone="ch-system-util-linux rfkill">
1153 <primary sortas="b-rfkill">rfkill</primary>
[78cc3be]1154 </indexterm>
1155 </listitem>
1156 </varlistentry>
1157
[5c92d21]1158 <varlistentry id="rtcwake">
1159 <term><command>rtcwake</command></term>
[ddd5542]1160 <listitem>
[9bb4939]1161 <para>Used to enter a system sleep state until the specified wakeup
[5c92d21]1162 time</para>
[e1428f3]1163 <indexterm zone="ch-system-util-linux rtcwake">
[5c92d21]1164 <primary sortas="b-rtcwake">rtcwake</primary>
[ddd5542]1165 </indexterm>
1166 </listitem>
1167 </varlistentry>
1168
1169 <varlistentry id="script">
1170 <term><command>script</command></term>
1171 <listitem>
1172 <para>Makes a typescript of a terminal session</para>
[e1428f3]1173 <indexterm zone="ch-system-util-linux script">
[ddd5542]1174 <primary sortas="b-script">script</primary>
1175 </indexterm>
1176 </listitem>
1177 </varlistentry>
1178
[50c357d3]1179 <varlistentry id="scriptlive">
1180 <term><command>scriptlive</command></term>
1181 <listitem>
[9bb4939]1182 <para>Re-runs session typescripts using timing information</para>
[50c357d3]1183 <indexterm zone="ch-system-util-linux scriptlive">
1184 <primary sortas="b-scriptlive">scriptlive</primary>
1185 </indexterm>
1186 </listitem>
1187 </varlistentry>
1188
[5c92d21]1189 <varlistentry id="scriptreplay">
1190 <term><command>scriptreplay</command></term>
1191 <listitem>
1192 <para>Plays back typescripts using timing information</para>
[e1428f3]1193 <indexterm zone="ch-system-util-linux scriptreplay">
[5c92d21]1194 <primary sortas="b-scriptreplay">scriptreplay</primary>
1195 </indexterm>
1196 </listitem>
1197 </varlistentry>
1198
1199 <varlistentry id="setarch">
1200 <term><command>setarch</command></term>
[ddd5542]1201 <listitem>
[9bb4939]1202 <para>Changes reported architecture in a new program environment, and
[5c92d21]1203 sets personality flags</para>
[e1428f3]1204 <indexterm zone="ch-system-util-linux setarch">
[5c92d21]1205 <primary sortas="b-setarch">setarch</primary>
[ddd5542]1206 </indexterm>
1207 </listitem>
1208 </varlistentry>
1209
1210 <varlistentry id="setsid">
1211 <term><command>setsid</command></term>
1212 <listitem>
1213 <para>Runs the given program in a new session</para>
[e1428f3]1214 <indexterm zone="ch-system-util-linux setsid">
[ddd5542]1215 <primary sortas="b-setsid">setsid</primary>
1216 </indexterm>
1217 </listitem>
1218 </varlistentry>
1219
1220 <varlistentry id="setterm">
1221 <term><command>setterm</command></term>
1222 <listitem>
1223 <para>Sets terminal attributes</para>
[e1428f3]1224 <indexterm zone="ch-system-util-linux setterm">
[ddd5542]1225 <primary sortas="b-setterm">setterm</primary>
1226 </indexterm>
1227 </listitem>
1228 </varlistentry>
1229
1230 <varlistentry id="sfdisk">
1231 <term><command>sfdisk</command></term>
1232 <listitem>
1233 <para>A disk partition table manipulator</para>
[e1428f3]1234 <indexterm zone="ch-system-util-linux sfdisk">
[ddd5542]1235 <primary sortas="b-sfdisk">sfdisk</primary>
1236 </indexterm>
1237 </listitem>
1238 </varlistentry>
1239
[4783efe]1240 <varlistentry id="sulogin">
1241 <term><command>sulogin</command></term>
1242 <listitem>
1243 <para>Allows <systemitem class="username">root</systemitem> to log in;
1244 it is normally invoked by <command>init</command> when the system goes
1245 into single user mode</para>
1246 <indexterm zone="ch-system-util-linux sulogin">
1247 <primary sortas="b-sulogin">sulogin</primary>
1248 </indexterm>
1249 </listitem>
1250 </varlistentry>
1251
[6541b70]1252 <varlistentry id="swaplabel">
1253 <term><command>swaplabel</command></term>
1254 <listitem>
[9bb4939]1255 <para>Makes changes to the swap area's UUID and label</para>
[e1428f3]1256 <indexterm zone="ch-system-util-linux swaplabel">
[6541b70]1257 <primary sortas="b-swaplabel">swaplabel</primary>
1258 </indexterm>
1259 </listitem>
1260 </varlistentry>
1261
[90aae6b]1262 <varlistentry id="swapoff">
1263 <term><command>swapoff</command></term>
1264 <listitem>
1265 <para>Disables devices and files for paging and swapping</para>
[e1428f3]1266 <indexterm zone="ch-system-util-linux swapoff">
[90aae6b]1267 <primary sortas="b-swapoff">swapoff</primary>
1268 </indexterm>
1269 </listitem>
1270 </varlistentry>
1271
[ddd5542]1272 <varlistentry id="swapon">
1273 <term><command>swapon</command></term>
1274 <listitem>
[9bb4939]1275 <para>Enables devices and files for paging and swapping, and
[ddd5542]1276 lists the devices and files currently in use</para>
[e1428f3]1277 <indexterm zone="ch-system-util-linux swapon">
[ddd5542]1278 <primary sortas="b-swapon">swapon</primary>
1279 </indexterm>
1280 </listitem>
1281 </varlistentry>
1282
[cd82ee5]1283 <varlistentry id="switch_root">
1284 <term><command>switch_root</command></term>
1285 <listitem>
1286 <para>Switches to another filesystem as the root of the mount tree</para>
[e1428f3]1287 <indexterm zone="ch-system-util-linux switch_root">
[cd82ee5]1288 <primary sortas="b-switch_root">switch_root</primary>
1289 </indexterm>
1290 </listitem>
1291 </varlistentry>
1292
[5c92d21]1293 <varlistentry id="taskset">
1294 <term><command>taskset</command></term>
1295 <listitem>
[9bb4939]1296 <para>Retrieves or sets a process's CPU affinity</para>
[e1428f3]1297 <indexterm zone="ch-system-util-linux taskset">
[5c92d21]1298 <primary sortas="b-taskset">taskset</primary>
1299 </indexterm>
1300 </listitem>
1301 </varlistentry>
1302
[50c357d3]1303 <varlistentry id="uclampset">
1304 <term><command>uclampset</command></term>
1305 <listitem>
[9bb4939]1306 <para>Manipulates the utilization clamping attributes of the
[50c357d3]1307 system or a process</para>
1308 <indexterm zone="ch-system-util-linux uclampset">
1309 <primary sortas="b-uclampset">uclampset</primary>
1310 </indexterm>
1311 </listitem>
1312 </varlistentry>
1313
[ddd5542]1314 <varlistentry id="ul">
1315 <term><command>ul</command></term>
1316 <listitem>
1317 <para>A filter for translating underscores into escape sequences
1318 indicating underlining for the terminal in use</para>
[e1428f3]1319 <indexterm zone="ch-system-util-linux ul">
[ddd5542]1320 <primary sortas="b-ul">ul</primary>
1321 </indexterm>
1322 </listitem>
1323 </varlistentry>
1324
1325 <varlistentry id="umount">
1326 <term><command>umount</command></term>
1327 <listitem>
1328 <para>Disconnects a file system from the system's file tree</para>
[e1428f3]1329 <indexterm zone="ch-system-util-linux umount">
[ddd5542]1330 <primary sortas="b-umount">umount</primary>
1331 </indexterm>
1332 </listitem>
1333 </varlistentry>
1334
[040ecb6]1335 <varlistentry id="uname26">
1336 <term><command>uname26</command></term>
1337 <listitem>
1338 <para>A symbolic link to setarch</para>
1339 <indexterm zone="ch-system-util-linux uname26">
1340 <primary sortas="b-uname26">uname26</primary>
1341 </indexterm>
1342 </listitem>
1343 </varlistentry>
1344
[9d42ad9]1345 <varlistentry id="unshare">
1346 <term><command>unshare</command></term>
1347 <listitem>
1348 <para>Runs a program with some namespaces unshared from parent</para>
[e1428f3]1349 <indexterm zone="ch-system-util-linux unshare">
[9d42ad9]1350 <primary sortas="b-unshare">unshare</primary>
1351 </indexterm>
1352 </listitem>
1353 </varlistentry>
1354
[ca101ad]1355 <varlistentry id="utmpdump">
1356 <term><command>utmpdump</command></term>
1357 <listitem>
[9bb4939]1358 <para>Displays the content of the given login file in a
[ca101ad]1359 user-friendly format</para>
1360 <indexterm zone="ch-system-util-linux utmpdump">
1361 <primary sortas="b-utmpdump">utmpdump</primary>
1362 </indexterm>
1363 </listitem>
1364 </varlistentry>
1365
[cd82ee5]1366 <varlistentry id="uuidd">
1367 <term><command>uuidd</command></term>
1368 <listitem>
1369 <para>A daemon used by the UUID library to generate time-based
[0d84af1]1370 UUIDs in a secure and guaranteed-unique fashion</para>
[e1428f3]1371 <indexterm zone="ch-system-util-linux uuidd">
[cd82ee5]1372 <primary sortas="b-uuidd">uuidd</primary>
1373 </indexterm>
1374 </listitem>
1375 </varlistentry>
1376
1377 <varlistentry id="uuidgen">
1378 <term><command>uuidgen</command></term>
1379 <listitem>
[9bb4939]1380 <para>Creates new UUIDs. Each new UUID is a random number likely to be
[cd82ee5]1381 unique among all UUIDs created, on the local system and on other
[9bb4939]1382 systems, in the past and in the future, with extremely high
[e8f0a1b]1383 probability (2<superscript>128</superscript> UUIDs are
1384 possible)</para>
[e1428f3]1385 <indexterm zone="ch-system-util-linux uuidgen">
[cd82ee5]1386 <primary sortas="b-uuidgen">uuidgen</primary>
1387 </indexterm>
1388 </listitem>
1389 </varlistentry>
1390
[78cc3be]1391 <varlistentry id="uuidparse">
1392 <term><command>uuidparse</command></term>
1393 <listitem>
[9bb4939]1394 <para>A utility to parse unique identifiers</para>
[78cc3be]1395 <indexterm zone="ch-system-util-linux uuidparse">
1396 <primary sortas="b-uuidparse">uuidparse</primary>
1397 </indexterm>
1398 </listitem>
1399 </varlistentry>
1400
[5c92d21]1401 <varlistentry id="wall">
1402 <term><command>wall</command></term>
[ddd5542]1403 <listitem>
[5c92d21]1404 <para>Displays the contents of a file or, by default, its standard
1405 input, on the terminals of all currently logged in users</para>
[e1428f3]1406 <indexterm zone="ch-system-util-linux wall">
[5c92d21]1407 <primary sortas="b-wall">wall</primary>
[ddd5542]1408 </indexterm>
1409 </listitem>
1410 </varlistentry>
1411
[ca101ad]1412 <varlistentry id="wdctl">
1413 <term><command>wdctl</command></term>
1414 <listitem>
1415 <para>Shows hardware watchdog status</para>
1416 <indexterm zone="ch-system-util-linux wdctl">
1417 <primary sortas="b-wdctl">wdctl</primary>
1418 </indexterm>
1419 </listitem>
1420 </varlistentry>
1421
[ddd5542]1422 <varlistentry id="whereis">
1423 <term><command>whereis</command></term>
1424 <listitem>
1425 <para>Reports the location of the binary, source, and man page
[9bb4939]1426 files for the given command</para>
[e1428f3]1427 <indexterm zone="ch-system-util-linux whereis">
[ddd5542]1428 <primary sortas="b-whereis">whereis</primary>
1429 </indexterm>
1430 </listitem>
1431 </varlistentry>
1432
[9d42ad9]1433 <varlistentry id="wipefs">
1434 <term><command>wipefs</command></term>
1435 <listitem>
1436 <para>Wipes a filesystem signature from a device</para>
[e1428f3]1437 <indexterm zone="ch-system-util-linux wipefs">
[9d42ad9]1438 <primary sortas="b-wipefs">wipefs</primary>
1439 </indexterm>
1440 </listitem>
1441 </varlistentry>
1442
[0c90d60]1443 <varlistentry id="x86_64">
1444 <term><command>x86_64</command></term>
[ddd5542]1445 <listitem>
[0c90d60]1446 <para>A symbolic link to setarch</para>
1447 <indexterm zone="ch-system-util-linux x86_64">
1448 <primary sortas="b-x86_64">x86_64</primary>
[ddd5542]1449 </indexterm>
1450 </listitem>
1451 </varlistentry>
1452
[eb8b1c5]1453 <varlistentry id="zramctl">
1454 <term><command>zramctl</command></term>
1455 <listitem>
[d672ab7]1456 <para>A program to set up and control zram (compressed ram disk)
[eb8b1c5]1457 devices</para>
1458 <indexterm zone="ch-system-util-linux zramctl">
1459 <primary sortas="b-zramctl">zramctl</primary>
1460 </indexterm>
1461 </listitem>
1462 </varlistentry>
1463
[cd82ee5]1464 <varlistentry id="libblkid">
1465 <term><filename class="libraryfile">libblkid</filename></term>
1466 <listitem>
1467 <para>Contains routines for device identification and token
1468 extraction</para>
[e1428f3]1469 <indexterm zone="ch-system-util-linux libblkid">
[cd82ee5]1470 <primary sortas="c-libblkid">libblkid</primary>
1471 </indexterm>
1472 </listitem>
1473 </varlistentry>
1474
[eb8b1c5]1475 <varlistentry id="libfdisk">
1476 <term><filename class="libraryfile">libfdisk</filename></term>
1477 <listitem>
1478 <para>Contains routines for manipulating partition tables</para>
1479 <indexterm zone="ch-system-util-linux libfdisk">
1480 <primary sortas="c-libfdisk">libfdisk</primary>
1481 </indexterm>
1482 </listitem>
1483 </varlistentry>
1484
[12d9bda6]1485 <varlistentry id="libmount">
1486 <term><filename class="libraryfile">libmount</filename></term>
1487 <listitem>
1488 <para>Contains routines for block device mounting and
1489 unmounting</para>
1490 <indexterm zone="ch-system-util-linux libmount">
1491 <primary sortas="c-libmount">libmount</primary>
1492 </indexterm>
1493 </listitem>
1494 </varlistentry>
1495
[eb8b1c5]1496 <varlistentry id="libsmartcols">
1497 <term><filename class="libraryfile">libsmartcols</filename></term>
1498 <listitem>
1499 <para>Contains routines for aiding screen output in tabular form</para>
1500 <indexterm zone="ch-system-util-linux libsmartcols">
1501 <primary sortas="c-libsmartcols">libsmartcols</primary>
1502 </indexterm>
1503 </listitem>
1504 </varlistentry>
1505
[cd82ee5]1506 <varlistentry id="libuuid">
1507 <term><filename class="libraryfile">libuuid</filename></term>
1508 <listitem>
1509 <para>Contains routines for generating unique identifiers for objects
1510 that may be accessible beyond the local system</para>
[e1428f3]1511 <indexterm zone="ch-system-util-linux libuuid">
[cd82ee5]1512 <primary sortas="c-libuuid">libuuid</primary>
1513 </indexterm>
1514 </listitem>
1515 </varlistentry>
1516
[ddd5542]1517 </variablelist>
1518
1519 </sect2>
[673b0d8]1520
1521</sect1>
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