source: chapter08/util-linux.xml@ b2837c9

multilib xry111/multilib
Last change on this file since b2837c9 was 9dca319, checked in by Thomas Trepl <thomas@…>, 5 months ago

Automatic merge of trunk into multilib
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File size: 53.8 KB
RevLine 
[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
[9bfd203f]96 <!-- To editors:
97 Two tests need a /etc/fstab file. They are skipped if the host
98 distro isn't using systemd as the init system, so don't remove
99 the creation of /etc/fstab unless you've tested it with such a
100 host distro (for example LFS systemd or Debian). -->
101 <para>If desired, create a dummy <filename>/etc/fstab</filename> file
102 to satisfy two tests and run the test suite as a non-&root;
103 user:</para>
[6c4092b0]104
[38de42d]105 <warning><para>Running the test suite as the
106 <systemitem class="username">root</systemitem> user can be harmful to
[4783efe]107 your system. To run it, the CONFIG_SCSI_DEBUG option for the kernel must
[6dfcfecc]108 be available in the currently running system and must be built as a
[4783efe]109 module. Building it into the kernel will prevent booting. For complete
110 coverage, other BLFS packages must be installed. If desired, this test can
[9bb4939]111 be run by booting into the completed LFS system and running:</para>
[6c4092b0]112
[e37764e]113<screen role="nodump"><userinput>bash tests/run.sh --srcdir=$PWD --builddir=$PWD</userinput></screen>
[6c4092b0]114 </warning>
[11d5dee]115
[9bfd203f]116<screen><userinput remap="test">touch /etc/fstab
117chown -R tester .
[8d4f212]118su tester -c "make -k check"</userinput></screen>
[673b0d8]119
[9b01d1b]120 <para>
121 The <emphasis>hardlink</emphasis> tests will fail if the host's kernel
122 does not have the option <option>CONFIG_CRYPTO_USER_API_HASH</option>
123 enabled or does not have any options providing a SHA256 implementation
124 (for example, <option>CONFIG_CRYPTO_SHA256</option>, or
125 <option>CONFIG_CRYPTO_SHA256_SSSE3</option> if the CPU supports
126 Supplemental SSE3) enabled. In addition, the lsfd: inotify test will
127 fail if the kernel option <option>CONFIG_NETLINK_DIAG</option> is not
128 enabled.
129 </para>
[676f0fd]130
[0b8bbee]131 <para>Install the package:</para>
132
[4bac71c]133<screen><userinput remap="install">make install</userinput></screen>
[ff96923]134<!--
[7fe99c2]135 <para>Finally, install the man pages:</para>
136
[ff96923]137<screen><userinput remap="install">tar -xf ../util-linux-man-pages-&util-linux-version;.tar.xz - -directory /usr/share/man - -strip-components=1</userinput></screen>
138-->
[b3f1ebb3]139 </sect2>
140
[6dfcfecc]141 <!-- - - - - - - - - - -->
142 <!-- Multilib - 32bit -->
143 <!-- - - - - - - - - - -->
[fd48baa]144
145 <sect2 arch="ml_32,ml_all" role="installation">
[b3f1ebb3]146 <title>Installation of Util-linux - 32-bit</title>
147
148 <para>Clean previous build:</para>
149
150<screen><userinput remap="pre">make distclean</userinput></screen>
151
[a08b5f0]152 <para>Move a tool out of the way which is optionally used by
153 configure but will report invalid pathes for multilib builds.</para>
154
155<screen><userinput remap="configure">mv /usr/bin/ncursesw6-config{,.tmp}</userinput></screen>
156
[b3f1ebb3]157 <para>Prepare Util-linux for compilation:</para>
158
159<screen revision="sysv"><userinput remap="configure">CC="gcc -m32" \
160./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
[70aadfb]161 --host=i686-pc-linux-gnu \
162 --libdir=/usr/lib32 \
[ce45f8d]163 --runstatedir=/run \
164 --sbindir=/usr/sbin \
[b3f1ebb3]165 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
166 --disable-chfn-chsh \
167 --disable-login \
168 --disable-nologin \
169 --disable-su \
170 --disable-setpriv \
171 --disable-runuser \
172 --disable-pylibmount \
[ce45f8d]173 --disable-liblastlog2 \
[b3f1ebb3]174 --disable-static \
175 --without-python \
176 --without-systemd \
[a08b5f0]177 --without-systemdsystemunitdir</userinput></screen>
[b3f1ebb3]178
179<screen revision="systemd"><userinput remap="configure">CC="gcc -m32" \
180./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
[70aadfb]181 --host=i686-pc-linux-gnu \
182 --libdir=/usr/lib32 \
[ce45f8d]183 --runstatedir=/run \
184 --sbindir=/usr/sbin \
[b3f1ebb3]185 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
186 --disable-chfn-chsh \
187 --disable-login \
188 --disable-nologin \
189 --disable-su \
190 --disable-setpriv \
191 --disable-runuser \
192 --disable-pylibmount \
[ce45f8d]193 --disable-liblastlog2 \
[b3f1ebb3]194 --disable-static \
[a08b5f0]195 --without-python</userinput></screen>
196
197 <para>Restore the tool previously moved away:</para>
198
199<screen><userinput remap="configure">mv /usr/bin/ncursesw6-config{.tmp,}</userinput></screen>
[b3f1ebb3]200
201 <para>Compile the package:</para>
202
203<screen><userinput remap="make">make</userinput></screen>
204
205 <para>Install the package:</para>
206
207<screen><userinput remap="install">make DESTDIR=$PWD/DESTDIR install
[0ebda11]208cp -Rv DESTDIR/usr/lib32/* /usr/lib32
[b3f1ebb3]209rm -rf DESTDIR</userinput></screen>
210
[6dfcfecc]211 </sect2><!-- m32 -->
[b3f1ebb3]212
[6dfcfecc]213 <!-- - - - - - - - - - -->
214 <!-- Multilib - x32bit -->
215 <!-- - - - - - - - - - -->
[fd48baa]216
217 <sect2 arch="ml_x32,ml_all" role="installation">
[b3f1ebb3]218 <title>Installation of Util-linux - x32-bit</title>
219
220 <para>Clean previous build:</para>
221
222<screen><userinput remap="pre">make distclean</userinput></screen>
223
[a08b5f0]224 <para>Move a tool out of the way which is optionally used by
225 configure but will report invalid pathes for multilib builds.</para>
226
227<screen><userinput remap="configure">mv /usr/bin/ncursesw6-config{,.tmp}</userinput></screen>
228
[b3f1ebb3]229 <para>Prepare Util-linux for compilation:</para>
230
231<screen revision="sysv"><userinput remap="configure">CC="gcc -mx32" \
232./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
[70aadfb]233 --host=x86_64-pc-linux-gnux32 \
[ce45f8d]234 --libdir=/usr/libx32 \
235 --runstatedir=/run \
236 --sbindir=/usr/sbin \
[b3f1ebb3]237 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
[ce45f8d]238 --disable-chfn-chsh \
239 --disable-login \
240 --disable-nologin \
241 --disable-su \
242 --disable-setpriv \
243 --disable-runuser \
244 --disable-pylibmount \
245 --disable-liblastlog2 \
246 --disable-static \
247 --without-python \
248 --without-systemd \
[a08b5f0]249 --without-systemdsystemunitdir</userinput></screen>
[b3f1ebb3]250
251<screen revision="systemd"><userinput remap="configure">CC="gcc -mx32" \
252./configure ADJTIME_PATH=/var/lib/hwclock/adjtime \
[70aadfb]253 --host=x86_64-pc-linux-gnux32 \
[ce45f8d]254 --libdir=/usr/libx32 \
255 --runstatedir=/run \
256 --sbindir=/usr/sbin \
[b3f1ebb3]257 --docdir=/usr/share/doc/util-linux-&util-linux-version; \
[ce45f8d]258 --disable-chfn-chsh \
259 --disable-login \
260 --disable-nologin \
261 --disable-su \
262 --disable-setpriv \
263 --disable-runuser \
264 --disable-pylibmount \
265 --disable-liblastlog2 \
266 --disable-static \
[a08b5f0]267 --without-python</userinput></screen>
268
269 <para>Restore the tool previously moved away:</para>
270
271<screen><userinput remap="configure">mv /usr/bin/ncursesw6-config{.tmp,}</userinput></screen>
[b3f1ebb3]272
273 <para>Compile the package:</para>
274
275<screen><userinput remap="make">make</userinput></screen>
276
277 <para>Install the package:</para>
278
279<screen><userinput remap="install">make DESTDIR=$PWD/DESTDIR install
[0ebda11]280cp -Rv DESTDIR/usr/libx32/* /usr/libx32
[b3f1ebb3]281rm -rf DESTDIR</userinput></screen>
[673b0d8]282
[6dfcfecc]283 </sect2><!-- mx32 -->
[ddd5542]284
285 <sect2 id="contents-utillinux" role="content">
[e1428f3]286 <title>Contents of Util-linux</title>
[ddd5542]287
288 <segmentedlist>
289 <segtitle>Installed programs</segtitle>
[cd82ee5]290 <segtitle>Installed libraries</segtitle>
[fe05b08]291 <segtitle>Installed directories</segtitle>
[ddd5542]292
293 <seglistitem>
[78cc3be]294 <seg>addpart, agetty, blkdiscard, blkid, blkzone, blockdev, cal, cfdisk, chcpu,
295 chmem, choom, chrt, col, colcrt, colrm, column, ctrlaltdel, delpart, dmesg,
[50c357d3]296 eject, fallocate, fdisk, fincore, findfs, findmnt, flock, fsck,
[9bb4939]297 fsck.cramfs, fsck.minix, fsfreeze, fstrim, getopt, hardlink, hexdump, hwclock,
298 i386 (link to setarch), ionice, ipcmk, ipcrm, ipcs, irqtop, isosize, kill, last,
299 lastb (link to last), ldattach, linux32 (link to setarch), linux64 (link to setarch),
300 logger, look, losetup, lsblk, lscpu, lsipc, lsirq, lsfd, lslocks, lslogins,
301 lsmem, lsns, mcookie, mesg, mkfs, mkfs.bfs, mkfs.cramfs, mkfs.minix, mkswap,
[7b370c5]302 more, mount, mountpoint, namei, nsenter, partx, pivot_root, prlimit,
[78cc3be]303 readprofile, rename, renice, resizepart, rev, rfkill, rtcwake, script,
[50c357d3]304 scriptlive, scriptreplay, setarch, setsid, setterm, sfdisk, sulogin, swaplabel,
[9bb4939]305 swapoff, swapon, switch_root, taskset, uclampset, ul,
306 umount, uname26 (link to setarch), unshare, utmpdump, uuidd, uuidgen, uuidparse,
307 wall, wdctl, whereis, wipefs, x86_64 (link to setarch), and zramctl</seg>
[d672ab7]308 <seg>libblkid.so, libfdisk.so, libmount.so,
[040ecb6]309 libsmartcols.so, and libuuid.so</seg>
[d672ab7]310 <seg>/usr/include/blkid,
311 /usr/include/libfdisk,
312 /usr/include/libmount,
313 /usr/include/libsmartcols,
314 /usr/include/uuid,
315 /usr/share/doc/util-linux-&util-linux-version;,
[040ecb6]316 and /var/lib/hwclock</seg>
[ddd5542]317 </seglistitem>
318 </segmentedlist>
319
320 <variablelist>
321 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
322 <?dbfo list-presentation="list"?>
323 <?dbhtml list-presentation="table"?>
324
[5c92d21]325 <varlistentry id="addpart">
326 <term><command>addpart</command></term>
327 <listitem>
328 <para>Informs the Linux kernel of new partitions</para>
[e1428f3]329 <indexterm zone="ch-system-util-linux addpart">
[5c92d21]330 <primary sortas="b-addpart">addpart</primary>
331 </indexterm>
332 </listitem>
333 </varlistentry>
334
[ddd5542]335 <varlistentry id="agetty">
336 <term><command>agetty</command></term>
337 <listitem>
338 <para>Opens a tty port, prompts for a login name,
339 and then invokes the <command>login</command> program</para>
[e1428f3]340 <indexterm zone="ch-system-util-linux agetty">
[ddd5542]341 <primary sortas="b-agetty">agetty</primary>
342 </indexterm>
343 </listitem>
344 </varlistentry>
345
[f6b1d91]346 <varlistentry id="blkdiscard">
347 <term><command>blkdiscard</command></term>
348 <listitem>
349 <para>Discards sectors on a device</para>
350 <indexterm zone="ch-system-util-linux blkdiscard">
351 <primary sortas="b-blkdiscard">blkdiscard</primary>
352 </indexterm>
353 </listitem>
354 </varlistentry>
355
[cd82ee5]356 <varlistentry id="blkid">
357 <term><command>blkid</command></term>
358 <listitem>
359 <para>A command line utility to locate and print block device
360 attributes</para>
[e1428f3]361 <indexterm zone="ch-system-util-linux blkid">
[cd82ee5]362 <primary sortas="b-blkid">blkid</primary>
363 </indexterm>
364 </listitem>
365 </varlistentry>
366
[78cc3be]367 <varlistentry id="blkzone">
368 <term><command>blkzone</command></term>
369 <listitem>
[9bb4939]370 <para>Is used to manage zoned storage block devices</para>
[78cc3be]371 <indexterm zone="ch-system-util-linux blkzone">
372 <primary sortas="b-blkzone">blkzone</primary>
373 </indexterm>
374 </listitem>
375 </varlistentry>
376
[ddd5542]377 <varlistentry id="blockdev">
378 <term><command>blockdev</command></term>
379 <listitem>
380 <para>Allows users to call block device ioctls from the command
381 line</para>
[e1428f3]382 <indexterm zone="ch-system-util-linux blockdev">
[ddd5542]383 <primary sortas="b-blockdev">blockdev</primary>
384 </indexterm>
385 </listitem>
386 </varlistentry>
387
388 <varlistentry id="cal">
389 <term><command>cal</command></term>
390 <listitem>
391 <para>Displays a simple calendar</para>
[e1428f3]392 <indexterm zone="ch-system-util-linux cal">
[ddd5542]393 <primary sortas="b-cal">cal</primary>
394 </indexterm>
395 </listitem>
396 </varlistentry>
397
398 <varlistentry id="cfdisk">
399 <term><command>cfdisk</command></term>
400 <listitem>
401 <para>Manipulates the partition table of the given device</para>
[e1428f3]402 <indexterm zone="ch-system-util-linux cfdisk">
[ddd5542]403 <primary sortas="b-cfdisk">cfdisk</primary>
404 </indexterm>
405 </listitem>
406 </varlistentry>
407
[0c90d60]408 <varlistentry id="chcpu">
409 <term><command>chcpu</command></term>
410 <listitem>
411 <para>Modifies the state of CPUs</para>
412 <indexterm zone="ch-system-util-linux chcpu">
413 <primary sortas="b-chcpu">chcpu</primary>
414 </indexterm>
415 </listitem>
416 </varlistentry>
[faaac5c]417
[78cc3be]418 <varlistentry id="chmem">
419 <term><command>chmem</command></term>
420 <listitem>
421 <para>Configures memory</para>
422 <indexterm zone="ch-system-util-linux chmem">
423 <primary sortas="b-chmem">chmem</primary>
424 </indexterm>
425 </listitem>
426 </varlistentry>
427
[faaac5c]428 <varlistentry id="choom">
429 <term><command>choom</command></term>
430 <listitem>
[9bb4939]431 <para>Displays and adjusts OOM-killer scores, used to determine
432 which process to kill first when Linux is Out Of Memory</para>
[faaac5c]433 <indexterm zone="ch-system-util-linux choom">
434 <primary sortas="b-choom">choom</primary>
435 </indexterm>
436 </listitem>
437 </varlistentry>
[0c90d60]438
[5c92d21]439 <varlistentry id="chrt">
440 <term><command>chrt</command></term>
441 <listitem>
442 <para>Manipulates real-time attributes of a process</para>
[e1428f3]443 <indexterm zone="ch-system-util-linux chrt">
[5c92d21]444 <primary sortas="b-chrt">chrt</primary>
445 </indexterm>
446 </listitem>
447 </varlistentry>
448
[ddd5542]449 <varlistentry id="col">
450 <term><command>col</command></term>
451 <listitem>
452 <para>Filters out reverse line feeds</para>
[e1428f3]453 <indexterm zone="ch-system-util-linux col">
[ddd5542]454 <primary sortas="b-col">col</primary>
455 </indexterm>
456 </listitem>
457 </varlistentry>
458
459 <varlistentry id="colcrt">
460 <term><command>colcrt</command></term>
461 <listitem>
462 <para>Filters <command>nroff</command> output for terminals
463 that lack some capabilities, such as overstriking and half-lines</para>
[e1428f3]464 <indexterm zone="ch-system-util-linux colcrt">
[ddd5542]465 <primary sortas="b-colcrt">colcrt</primary>
466 </indexterm>
467 </listitem>
468 </varlistentry>
469
470 <varlistentry id="colrm">
471 <term><command>colrm</command></term>
472 <listitem>
473 <para>Filters out the given columns</para>
[e1428f3]474 <indexterm zone="ch-system-util-linux colrm">
[ddd5542]475 <primary sortas="b-colrm">colrm</primary>
476 </indexterm>
477 </listitem>
478 </varlistentry>
479
480 <varlistentry id="column">
481 <term><command>column</command></term>
482 <listitem>
483 <para>Formats a given file into multiple columns</para>
[e1428f3]484 <indexterm zone="ch-system-util-linux column">
[ddd5542]485 <primary sortas="b-column">column</primary>
486 </indexterm>
487 </listitem>
488 </varlistentry>
489
490 <varlistentry id="ctrlaltdel">
491 <term><command>ctrlaltdel</command></term>
492 <listitem>
493 <para>Sets the function of the Ctrl+Alt+Del key combination to a
494 hard or a soft reset</para>
[e1428f3]495 <indexterm zone="ch-system-util-linux ctrlaltdel">
[ddd5542]496 <primary sortas="b-ctrlaltdel">ctrlaltdel</primary>
497 </indexterm>
498 </listitem>
499 </varlistentry>
500
[5c92d21]501 <varlistentry id="delpart">
502 <term><command>delpart</command></term>
[ddd5542]503 <listitem>
[5c92d21]504 <para>Asks the Linux kernel to remove a partition</para>
[e1428f3]505 <indexterm zone="ch-system-util-linux delpart">
[5c92d21]506 <primary sortas="b-delpart">delpart</primary>
[ddd5542]507 </indexterm>
508 </listitem>
509 </varlistentry>
510
[5c92d21]511 <varlistentry id="dmesg">
512 <term><command>dmesg</command></term>
[ddd5542]513 <listitem>
[5c92d21]514 <para>Dumps the kernel boot messages</para>
[e1428f3]515 <indexterm zone="ch-system-util-linux dmesg">
[5c92d21]516 <primary sortas="b-dmesg">dmesg</primary>
[ddd5542]517 </indexterm>
518 </listitem>
519 </varlistentry>
520
[ca101ad]521 <varlistentry id="eject">
522 <term><command>eject</command></term>
523 <listitem>
524 <para>Ejects removable media</para>
525 <indexterm zone="ch-system-util-linux eject">
526 <primary sortas="b-eject">eject</primary>
527 </indexterm>
528 </listitem>
529 </varlistentry>
530
[9d42ad9]531 <varlistentry id="fallocate">
532 <term><command>fallocate</command></term>
533 <listitem>
534 <para>Preallocates space to a file</para>
[e1428f3]535 <indexterm zone="ch-system-util-linux fallocate">
[9d42ad9]536 <primary sortas="b-fallocate">fallocate</primary>
537 </indexterm>
538 </listitem>
539 </varlistentry>
540
[2791a8e]541 <varlistentry id="fdisk">
542 <term><command>fdisk</command></term>
543 <listitem>
[edbeeb5]544 <para>Manipulates the partition table of the given device</para>
[e1428f3]545 <indexterm zone="ch-system-util-linux fdisk">
[2791a8e]546 <primary sortas="b-fdisk">fdisk</primary>
547 </indexterm>
548 </listitem>
549 </varlistentry>
550
[78cc3be]551 <varlistentry id="fincore">
552 <term><command>fincore</command></term>
553 <listitem>
554 <para>Counts pages of file contents in core</para>
555 <indexterm zone="ch-system-util-linux fincore">
556 <primary sortas="b-fincore">fincore</primary>
557 </indexterm>
558 </listitem>
559 </varlistentry>
560
[cd82ee5]561 <varlistentry id="findfs">
562 <term><command>findfs</command></term>
563 <listitem>
[9bb4939]564 <para>Finds a file system, either by label or Universally Unique Identifier
[cd82ee5]565 (UUID)</para>
[e1428f3]566 <indexterm zone="ch-system-util-linux findfs">
[cd82ee5]567 <primary sortas="b-findfs">findfs</primary>
568 </indexterm>
569 </listitem>
570 </varlistentry>
571
[6541b70]572 <varlistentry id="findmnt">
573 <term><command>findmnt</command></term>
574 <listitem>
[2ca8941]575 <para>Is a command line interface to the libmount library
[9bb4939]576 for working with mountinfo, fstab and mtab files</para>
[e1428f3]577 <indexterm zone="ch-system-util-linux findmnt">
[6541b70]578 <primary sortas="b-findmnt">findmnt</primary>
579 </indexterm>
580 </listitem>
581 </varlistentry>
582
[8bc46a5]583 <varlistentry id="flock">
584 <term><command>flock</command></term>
585 <listitem>
586 <para>Acquires a file lock and then executes a command with the lock
587 held</para>
[e1428f3]588 <indexterm zone="ch-system-util-linux flock">
[a2add74]589 <primary sortas="b-flock">flock</primary>
[8bc46a5]590 </indexterm>
591 </listitem>
592 </varlistentry>
593
[cd82ee5]594 <varlistentry id="fsck">
595 <term><command>fsck</command></term>
596 <listitem>
597 <para>Is used to check, and optionally repair, file systems</para>
[e1428f3]598 <indexterm zone="ch-system-util-linux fsck">
[cd82ee5]599 <primary sortas="b-fsck">fsck</primary>
600 </indexterm>
601 </listitem>
602 </varlistentry>
603
[ddd5542]604 <varlistentry id="fsck.cramfs">
605 <term><command>fsck.cramfs</command></term>
606 <listitem>
607 <para>Performs a consistency check on the Cramfs file system on the
608 given device</para>
[e1428f3]609 <indexterm zone="ch-system-util-linux fsck.cramfs">
[ddd5542]610 <primary sortas="b-fsck.cramfs">fsck.cramfs</primary>
611 </indexterm>
612 </listitem>
613 </varlistentry>
614
615 <varlistentry id="fsck.minix">
616 <term><command>fsck.minix</command></term>
617 <listitem>
618 <para>Performs a consistency check on the Minix file system on the
619 given device</para>
[e1428f3]620 <indexterm zone="ch-system-util-linux fsck.minix">
[ddd5542]621 <primary sortas="b-fsck.minix">fsck.minix</primary>
622 </indexterm>
623 </listitem>
624 </varlistentry>
625
[6541b70]626 <varlistentry id="fsfreeze">
627 <term><command>fsfreeze</command></term>
628 <listitem>
[2ca8941]629 <para>Is a very simple wrapper around FIFREEZE/FITHAW ioctl
[6541b70]630 kernel driver operations</para>
[e1428f3]631 <indexterm zone="ch-system-util-linux fsfreeze">
[6541b70]632 <primary sortas="b-fsfreeze">fsfreeze</primary>
633 </indexterm>
634 </listitem>
635 </varlistentry>
636
[e1428f3]637 <varlistentry id="fstrim">
638 <term><command>fstrim</command></term>
639 <listitem>
640 <para>Discards unused blocks on a mounted filesystem</para>
641 <indexterm zone="ch-system-util-linux fstrim">
642 <primary sortas="b-fstrim">fstrim</primary>
643 </indexterm>
644 </listitem>
645 </varlistentry>
646
[ddd5542]647 <varlistentry id="getopt">
648 <term><command>getopt</command></term>
649 <listitem>
650 <para>Parses options in the given command line</para>
[e1428f3]651 <indexterm zone="ch-system-util-linux getopt">
[ddd5542]652 <primary sortas="b-getopt">getopt</primary>
653 </indexterm>
654 </listitem>
655 </varlistentry>
[9bb4939]656
657 <varlistentry id="hardlink">
658 <term><command>hardlink</command></term>
659 <listitem>
660 <para>Consolidates duplicate files by creating hard links</para>
661 <indexterm zone="ch-system-util-linux hardlink">
662 <primary sortas="b-hardlink">hardlink</primary>
663 </indexterm>
664 </listitem>
665 </varlistentry>
[ddd5542]666
667 <varlistentry id="hexdump">
668 <term><command>hexdump</command></term>
669 <listitem>
[9bb4939]670 <para>Dumps the given file in hexadecimal, decimal, octal,
671 or ascii</para>
[e1428f3]672 <indexterm zone="ch-system-util-linux hexdump">
[ddd5542]673 <primary sortas="b-hexdump">hexdump</primary>
674 </indexterm>
675 </listitem>
676 </varlistentry>
677
678 <varlistentry id="hwclock">
679 <term><command>hwclock</command></term>
680 <listitem>
681 <para>Reads or sets the system's hardware clock, also called
682 the Real-Time Clock (RTC) or Basic Input-Output System (BIOS)
683 clock</para>
[e1428f3]684 <indexterm zone="ch-system-util-linux hwclock">
[ddd5542]685 <primary sortas="b-hwclock">hwclock</primary>
686 </indexterm>
687 </listitem>
688 </varlistentry>
689
[db2f21e]690 <varlistentry id="i386">
691 <term><command>i386</command></term>
692 <listitem>
693 <para>A symbolic link to setarch</para>
[e1428f3]694 <indexterm zone="ch-system-util-linux i386">
[db2f21e]695 <primary sortas="b-i386">i386</primary>
696 </indexterm>
697 </listitem>
698 </varlistentry>
699
[5c92d21]700 <varlistentry id="ionice">
701 <term><command>ionice</command></term>
702 <listitem>
703 <para>Gets or sets the io scheduling class and priority for a program</para>
[e1428f3]704 <indexterm zone="ch-system-util-linux ionice">
[5c92d21]705 <primary sortas="b-ionice">ionice</primary>
706 </indexterm>
707 </listitem>
708 </varlistentry>
709
[cd82ee5]710 <varlistentry id="ipcmk">
711 <term><command>ipcmk</command></term>
712 <listitem>
713 <para>Creates various IPC resources</para>
[e1428f3]714 <indexterm zone="ch-system-util-linux ipcmk">
[cd82ee5]715 <primary sortas="b-ipcmk">ipcmk</primary>
716 </indexterm>
717 </listitem>
718 </varlistentry>
719
[ddd5542]720 <varlistentry id="ipcrm">
721 <term><command>ipcrm</command></term>
722 <listitem>
723 <para>Removes the given Inter-Process Communication (IPC) resource</para>
[e1428f3]724 <indexterm zone="ch-system-util-linux ipcrm">
[ddd5542]725 <primary sortas="b-ipcrm">ipcrm</primary>
726 </indexterm>
727 </listitem>
728 </varlistentry>
729
730 <varlistentry id="ipcs">
731 <term><command>ipcs</command></term>
732 <listitem>
733 <para>Provides IPC status information</para>
[e1428f3]734 <indexterm zone="ch-system-util-linux ipcs">
[ddd5542]735 <primary sortas="b-ipcs">ipcs</primary>
736 </indexterm>
737 </listitem>
738 </varlistentry>
739
[50c357d3]740 <varlistentry id="irqtop">
741 <term><command>irqtop</command></term>
742 <listitem>
743 <para>Displays kernel interrupt counter information in
[ea93c11]744 <ulink role='man' url='&man;top.1'>top(1)</ulink> style
745 view</para>
[50c357d3]746 <indexterm zone="ch-system-util-linux irqtop">
747 <primary sortas="b-irqtop">irqtop</primary>
748 </indexterm>
749 </listitem>
750 </varlistentry>
751
[ddd5542]752 <varlistentry id="isosize">
753 <term><command>isosize</command></term>
754 <listitem>
755 <para>Reports the size of an iso9660 file system</para>
[e1428f3]756 <indexterm zone="ch-system-util-linux isosize">
[ddd5542]757 <primary sortas="b-isosize">isosize</primary>
758 </indexterm>
759 </listitem>
760 </varlistentry>
761
[d9aaf3d]762 <varlistentry id="kill">
763 <term><command>kill</command></term>
764 <listitem>
765 <para>Sends signals to processes</para>
766 <indexterm zone="ch-system-util-linux kill">
767 <primary sortas="b-kill">kill</primary>
768 </indexterm>
769 </listitem>
770 </varlistentry>
771
[4783efe]772 <varlistentry id="last">
773 <term><command>last</command></term>
774 <listitem>
[d672ab7]775 <para>Shows which users last logged in (and out), searching back
776 through the <filename>/var/log/wtmp</filename> file; it also shows
[4783efe]777 system boots, shutdowns, and run-level changes</para>
778 <indexterm zone="ch-system-util-linux last">
779 <primary sortas="b-last">last</primary>
780 </indexterm>
781 </listitem>
782 </varlistentry>
783
784 <varlistentry id="lastb">
785 <term><command>lastb</command></term>
786 <listitem>
[d672ab7]787 <para>Shows the failed login attempts, as logged in
[4783efe]788 <filename>/var/log/btmp</filename></para>
789 <indexterm zone="ch-system-util-linux lastb">
790 <primary sortas="b-lastb">lastb</primary>
791 </indexterm>
792 </listitem>
793 </varlistentry>
794
[5c92d21]795 <varlistentry id="ldattach">
796 <term><command>ldattach</command></term>
797 <listitem>
798 <para>Attaches a line discipline to a serial line</para>
[e1428f3]799 <indexterm zone="ch-system-util-linux ldattach">
[5c92d21]800 <primary sortas="b-ldattach">ldattach</primary>
801 </indexterm>
802 </listitem>
803 </varlistentry>
804
[db2f21e]805 <varlistentry id="linux32">
806 <term><command>linux32</command></term>
807 <listitem>
808 <para>A symbolic link to setarch</para>
[e1428f3]809 <indexterm zone="ch-system-util-linux linux32">
[db2f21e]810 <primary sortas="b-linux32">linux32</primary>
811 </indexterm>
812 </listitem>
813 </varlistentry>
814
815 <varlistentry id="linux64">
816 <term><command>linux64</command></term>
817 <listitem>
818 <para>A symbolic link to setarch</para>
[e1428f3]819 <indexterm zone="ch-system-util-linux linux64">
[db2f21e]820 <primary sortas="b-linux64">linux64</primary>
821 </indexterm>
822 </listitem>
823 </varlistentry>
824
[ddd5542]825 <varlistentry id="logger">
826 <term><command>logger</command></term>
827 <listitem>
828 <para>Enters the given message into the system log</para>
[e1428f3]829 <indexterm zone="ch-system-util-linux logger">
[ddd5542]830 <primary sortas="b-logger">logger</primary>
831 </indexterm>
832 </listitem>
833 </varlistentry>
834
835 <varlistentry id="look">
836 <term><command>look</command></term>
837 <listitem>
838 <para>Displays lines that begin with the given string</para>
[e1428f3]839 <indexterm zone="ch-system-util-linux look">
[ddd5542]840 <primary sortas="b-look">look</primary>
841 </indexterm>
842 </listitem>
843 </varlistentry>
844
845 <varlistentry id="losetup">
846 <term><command>losetup</command></term>
847 <listitem>
848 <para>Sets up and controls loop devices</para>
[e1428f3]849 <indexterm zone="ch-system-util-linux losetup">
[ddd5542]850 <primary sortas="b-losetup">losetup</primary>
851 </indexterm>
852 </listitem>
853 </varlistentry>
854
[e1428f3]855 <varlistentry id="lsblk">
856 <term><command>lsblk</command></term>
857 <listitem>
858 <para>Lists information about all or selected block devices in
[afba93b]859 a tree-like format</para>
[e1428f3]860 <indexterm zone="ch-system-util-linux lsblk">
861 <primary sortas="b-lsblk">lsblk</primary>
862 </indexterm>
863 </listitem>
864 </varlistentry>
865
[cd82ee5]866 <varlistentry id="lscpu">
867 <term><command>lscpu</command></term>
868 <listitem>
[cb02946]869 <para>Prints CPU architecture information</para>
[e1428f3]870 <indexterm zone="ch-system-util-linux lscpu">
[cd82ee5]871 <primary sortas="b-lscpu">lscpu</primary>
872 </indexterm>
873 </listitem>
874 </varlistentry>
[9bb4939]875
876 <varlistentry id="lsfd">
877 <term><command>lsfd</command></term>
878 <listitem>
879 <para>Displays information about open files; replaces <command>lsof</command></para>
880 <indexterm zone="ch-system-util-linux lsfd">
881 <primary sortas="b-lsfd">lsfd</primary>
882 </indexterm>
883 </listitem>
884 </varlistentry>
[cd82ee5]885
[040ecb6]886 <varlistentry id="lsipc">
887 <term><command>lsipc</command></term>
888 <listitem>
889 <para>Prints information on IPC facilities currently employed
890 in the system</para>
891 <indexterm zone="ch-system-util-linux lsipc">
892 <primary sortas="b-lsipc">lsipc</primary>
893 </indexterm>
894 </listitem>
895 </varlistentry>
896
[50c357d3]897 <varlistentry id="lsirq">
898 <term><command>lsirq</command></term>
899 <listitem>
900 <para>Displays kernel interrupt counter information</para>
901 <indexterm zone="ch-system-util-linux lsirq">
902 <primary sortas="b-lsirq">lsirq</primary>
903 </indexterm>
904 </listitem>
905 </varlistentry>
906
[ca101ad]907 <varlistentry id="lslocks">
908 <term><command>lslocks</command></term>
909 <listitem>
910 <para>Lists local system locks</para>
911 <indexterm zone="ch-system-util-linux lslocks">
912 <primary sortas="b-lslocks">lslocks</primary>
913 </indexterm>
914 </listitem>
915 </varlistentry>
916
[14109e7]917 <varlistentry id="lslogins">
918 <term><command>lslogins</command></term>
919 <listitem>
920 <para>Lists information about users, groups and system accounts</para>
921 <indexterm zone="ch-system-util-linux lslogins">
922 <primary sortas="b-lslogins">lslogins</primary>
923 </indexterm>
924 </listitem>
925 </varlistentry>
926
[78cc3be]927 <varlistentry id="lsmem">
928 <term><command>lsmem</command></term>
929 <listitem>
930 <para>Lists the ranges of available memory with their online
931 status</para>
932 <indexterm zone="ch-system-util-linux lsmem">
933 <primary sortas="b-lsmem">lsmem</primary>
934 </indexterm>
935 </listitem>
936 </varlistentry>
937
938 <varlistentry id="lsns">
939 <term><command>lsns</command></term>
940 <listitem>
941 <para>Lists namespaces</para>
942 <indexterm zone="ch-system-util-linux lsns">
943 <primary sortas="b-lsns">lsns</primary>
944 </indexterm>
945 </listitem>
946 </varlistentry>
947
[ddd5542]948 <varlistentry id="mcookie">
949 <term><command>mcookie</command></term>
950 <listitem>
951 <para>Generates magic cookies (128-bit random hexadecimal numbers) for
952 <command>xauth</command></para>
[e1428f3]953 <indexterm zone="ch-system-util-linux mcookie">
[ddd5542]954 <primary sortas="b-mcookie">mcookie</primary>
955 </indexterm>
956 </listitem>
957 </varlistentry>
958
[4783efe]959 <varlistentry id="mesg">
960 <term><command>mesg</command></term>
961 <listitem>
[d672ab7]962 <para>Controls whether other users can send messages to the current
[4783efe]963 user's terminal</para>
964 <indexterm zone="ch-system-util-linux mesg">
965 <primary sortas="b-mesg">mesg</primary>
966 </indexterm>
967 </listitem>
968 </varlistentry>
969
[ddd5542]970 <varlistentry id="mkfs">
971 <term><command>mkfs</command></term>
972 <listitem>
973 <para>Builds a file system on a device (usually a hard disk
974 partition)</para>
[e1428f3]975 <indexterm zone="ch-system-util-linux mkfs">
[ddd5542]976 <primary sortas="b-mkfs">mkfs</primary>
977 </indexterm>
978 </listitem>
979 </varlistentry>
980
981 <varlistentry id="mkfs.bfs">
982 <term><command>mkfs.bfs</command></term>
983 <listitem>
984 <para>Creates a Santa Cruz Operations (SCO) bfs file system</para>
[e1428f3]985 <indexterm zone="ch-system-util-linux mkfs.bfs">
[ddd5542]986 <primary sortas="b-mkfs.bfs">mkfs.bfs</primary>
987 </indexterm>
988 </listitem>
989 </varlistentry>
990
991 <varlistentry id="mkfs.cramfs">
992 <term><command>mkfs.cramfs</command></term>
993 <listitem>
994 <para>Creates a cramfs file system</para>
[e1428f3]995 <indexterm zone="ch-system-util-linux mkfs.cramfs">
[ddd5542]996 <primary sortas="b-mkfs.cramfs">mkfs.cramfs</primary>
997 </indexterm>
998 </listitem>
999 </varlistentry>
1000
1001 <varlistentry id="mkfs.minix">
1002 <term><command>mkfs.minix</command></term>
1003 <listitem>
1004 <para>Creates a Minix file system</para>
[e1428f3]1005 <indexterm zone="ch-system-util-linux mkfs.minix">
[ddd5542]1006 <primary sortas="b-mkfs.minix">mkfs.minix</primary>
1007 </indexterm>
1008 </listitem>
1009 </varlistentry>
1010
1011 <varlistentry id="mkswap">
1012 <term><command>mkswap</command></term>
1013 <listitem>
1014 <para>Initializes the given device or file to be used as a swap
1015 area</para>
[e1428f3]1016 <indexterm zone="ch-system-util-linux mkswap">
[ddd5542]1017 <primary sortas="b-mkswap">mkswap</primary>
1018 </indexterm>
1019 </listitem>
1020 </varlistentry>
1021
1022 <varlistentry id="more">
1023 <term><command>more</command></term>
1024 <listitem>
1025 <para>A filter for paging through text one screen at a time</para>
[e1428f3]1026 <indexterm zone="ch-system-util-linux more">
[ddd5542]1027 <primary sortas="b-more">more</primary>
1028 </indexterm>
1029 </listitem>
1030 </varlistentry>
1031
1032 <varlistentry id="mount">
1033 <term><command>mount</command></term>
1034 <listitem>
1035 <para>Attaches the file system on the given device to a specified
1036 directory in the file-system tree</para>
[e1428f3]1037 <indexterm zone="ch-system-util-linux mount">
[ddd5542]1038 <primary sortas="b-mount">mount</primary>
1039 </indexterm>
1040 </listitem>
1041 </varlistentry>
1042
[eb797aa]1043 <varlistentry id="mountpoint">
1044 <term><command>mountpoint</command></term>
1045 <listitem>
1046 <para>Checks if the directory is a mountpoint</para>
1047 <indexterm zone="ch-system-util-linux mountpoint">
1048 <primary sortas="b-mountpoint">mountpoint</primary>
1049 </indexterm>
1050 </listitem>
1051 </varlistentry>
1052
[ddd5542]1053 <varlistentry id="namei">
1054 <term><command>namei</command></term>
1055 <listitem>
[9bb4939]1056 <para>Shows the symbolic links in the given paths</para>
[e1428f3]1057 <indexterm zone="ch-system-util-linux namei">
[ddd5542]1058 <primary sortas="b-namei">namei</primary>
1059 </indexterm>
1060 </listitem>
1061 </varlistentry>
1062
[f6b1d91]1063 <varlistentry id="nsenter">
1064 <term><command>nsenter</command></term>
1065 <listitem>
1066 <para>Runs a program with namespaces of other processes</para>
1067 <indexterm zone="ch-system-util-linux nsenter">
1068 <primary sortas="b-nsenter">nsenter</primary>
1069 </indexterm>
1070 </listitem>
1071 </varlistentry>
1072
[5c92d21]1073 <varlistentry id="partx">
1074 <term><command>partx</command></term>
1075 <listitem>
1076 <para>Tells the kernel about the presence and numbering of on-disk
1077 partitions</para>
[e1428f3]1078 <indexterm zone="ch-system-util-linux partx">
[5c92d21]1079 <primary sortas="b-partx">partx</primary>
1080 </indexterm>
1081 </listitem>
1082 </varlistentry>
1083
[ddd5542]1084 <varlistentry id="pivot_root">
1085 <term><command>pivot_root</command></term>
1086 <listitem>
1087 <para>Makes the given file system the new root file system of the
1088 current process</para>
[e1428f3]1089 <indexterm zone="ch-system-util-linux pivot_root">
[ddd5542]1090 <primary sortas="b-pivot_root">pivot_root</primary>
1091 </indexterm>
1092 </listitem>
1093 </varlistentry>
1094
[0c90d60]1095 <varlistentry id="prlimit">
1096 <term><command>prlimit</command></term>
1097 <listitem>
[9bb4939]1098 <para>Gets and sets a process's resource limits</para>
[0c90d60]1099 <indexterm zone="ch-system-util-linux prlimit">
1100 <primary sortas="b-prlimit">prlimit</primary>
1101 </indexterm>
1102 </listitem>
1103 </varlistentry>
1104
[ddd5542]1105 <varlistentry id="readprofile">
1106 <term><command>readprofile</command></term>
1107 <listitem>
1108 <para>Reads kernel profiling information</para>
[e1428f3]1109 <indexterm zone="ch-system-util-linux readprofile">
[ddd5542]1110 <primary sortas="b-readprofile">readprofile</primary>
1111 </indexterm>
1112 </listitem>
1113 </varlistentry>
1114
1115 <varlistentry id="rename">
1116 <term><command>rename</command></term>
1117 <listitem>
1118 <para>Renames the given files, replacing a given string with
1119 another</para>
[e1428f3]1120 <indexterm zone="ch-system-util-linux rename">
[ddd5542]1121 <primary sortas="b-rename">rename</primary>
1122 </indexterm>
1123 </listitem>
1124 </varlistentry>
1125
1126 <varlistentry id="renice">
1127 <term><command>renice</command></term>
1128 <listitem>
1129 <para>Alters the priority of running processes</para>
[e1428f3]1130 <indexterm zone="ch-system-util-linux renice">
[ddd5542]1131 <primary sortas="b-renice">renice</primary>
1132 </indexterm>
1133 </listitem>
1134 </varlistentry>
1135
[ca101ad]1136 <varlistentry id="resizepart">
1137 <term><command>resizepart</command></term>
1138 <listitem>
1139 <para>Asks the Linux kernel to resize a partition</para>
1140 <indexterm zone="ch-system-util-linux resizepart">
1141 <primary sortas="b-resizepart">resizepart</primary>
1142 </indexterm>
1143 </listitem>
1144 </varlistentry>
1145
[ddd5542]1146 <varlistentry id="rev">
1147 <term><command>rev</command></term>
1148 <listitem>
1149 <para>Reverses the lines of a given file</para>
[e1428f3]1150 <indexterm zone="ch-system-util-linux rev">
[ddd5542]1151 <primary sortas="b-rev">rev</primary>
1152 </indexterm>
1153 </listitem>
1154 </varlistentry>
1155
[d765208]1156 <varlistentry id="rfkill">
1157 <term><command>rfkill</command></term>
[78cc3be]1158 <listitem>
1159 <para>Tool for enabling and disabling wireless devices</para>
[d765208]1160 <indexterm zone="ch-system-util-linux rfkill">
1161 <primary sortas="b-rfkill">rfkill</primary>
[78cc3be]1162 </indexterm>
1163 </listitem>
1164 </varlistentry>
1165
[5c92d21]1166 <varlistentry id="rtcwake">
1167 <term><command>rtcwake</command></term>
[ddd5542]1168 <listitem>
[9bb4939]1169 <para>Used to enter a system sleep state until the specified wakeup
[5c92d21]1170 time</para>
[e1428f3]1171 <indexterm zone="ch-system-util-linux rtcwake">
[5c92d21]1172 <primary sortas="b-rtcwake">rtcwake</primary>
[ddd5542]1173 </indexterm>
1174 </listitem>
1175 </varlistentry>
1176
1177 <varlistentry id="script">
1178 <term><command>script</command></term>
1179 <listitem>
1180 <para>Makes a typescript of a terminal session</para>
[e1428f3]1181 <indexterm zone="ch-system-util-linux script">
[ddd5542]1182 <primary sortas="b-script">script</primary>
1183 </indexterm>
1184 </listitem>
1185 </varlistentry>
1186
[50c357d3]1187 <varlistentry id="scriptlive">
1188 <term><command>scriptlive</command></term>
1189 <listitem>
[9bb4939]1190 <para>Re-runs session typescripts using timing information</para>
[50c357d3]1191 <indexterm zone="ch-system-util-linux scriptlive">
1192 <primary sortas="b-scriptlive">scriptlive</primary>
1193 </indexterm>
1194 </listitem>
1195 </varlistentry>
1196
[5c92d21]1197 <varlistentry id="scriptreplay">
1198 <term><command>scriptreplay</command></term>
1199 <listitem>
1200 <para>Plays back typescripts using timing information</para>
[e1428f3]1201 <indexterm zone="ch-system-util-linux scriptreplay">
[5c92d21]1202 <primary sortas="b-scriptreplay">scriptreplay</primary>
1203 </indexterm>
1204 </listitem>
1205 </varlistentry>
1206
1207 <varlistentry id="setarch">
1208 <term><command>setarch</command></term>
[ddd5542]1209 <listitem>
[9bb4939]1210 <para>Changes reported architecture in a new program environment, and
[5c92d21]1211 sets personality flags</para>
[e1428f3]1212 <indexterm zone="ch-system-util-linux setarch">
[5c92d21]1213 <primary sortas="b-setarch">setarch</primary>
[ddd5542]1214 </indexterm>
1215 </listitem>
1216 </varlistentry>
1217
1218 <varlistentry id="setsid">
1219 <term><command>setsid</command></term>
1220 <listitem>
1221 <para>Runs the given program in a new session</para>
[e1428f3]1222 <indexterm zone="ch-system-util-linux setsid">
[ddd5542]1223 <primary sortas="b-setsid">setsid</primary>
1224 </indexterm>
1225 </listitem>
1226 </varlistentry>
1227
1228 <varlistentry id="setterm">
1229 <term><command>setterm</command></term>
1230 <listitem>
1231 <para>Sets terminal attributes</para>
[e1428f3]1232 <indexterm zone="ch-system-util-linux setterm">
[ddd5542]1233 <primary sortas="b-setterm">setterm</primary>
1234 </indexterm>
1235 </listitem>
1236 </varlistentry>
1237
1238 <varlistentry id="sfdisk">
1239 <term><command>sfdisk</command></term>
1240 <listitem>
1241 <para>A disk partition table manipulator</para>
[e1428f3]1242 <indexterm zone="ch-system-util-linux sfdisk">
[ddd5542]1243 <primary sortas="b-sfdisk">sfdisk</primary>
1244 </indexterm>
1245 </listitem>
1246 </varlistentry>
1247
[4783efe]1248 <varlistentry id="sulogin">
1249 <term><command>sulogin</command></term>
1250 <listitem>
1251 <para>Allows <systemitem class="username">root</systemitem> to log in;
1252 it is normally invoked by <command>init</command> when the system goes
1253 into single user mode</para>
1254 <indexterm zone="ch-system-util-linux sulogin">
1255 <primary sortas="b-sulogin">sulogin</primary>
1256 </indexterm>
1257 </listitem>
1258 </varlistentry>
1259
[6541b70]1260 <varlistentry id="swaplabel">
1261 <term><command>swaplabel</command></term>
1262 <listitem>
[9bb4939]1263 <para>Makes changes to the swap area's UUID and label</para>
[e1428f3]1264 <indexterm zone="ch-system-util-linux swaplabel">
[6541b70]1265 <primary sortas="b-swaplabel">swaplabel</primary>
1266 </indexterm>
1267 </listitem>
1268 </varlistentry>
1269
[90aae6b]1270 <varlistentry id="swapoff">
1271 <term><command>swapoff</command></term>
1272 <listitem>
1273 <para>Disables devices and files for paging and swapping</para>
[e1428f3]1274 <indexterm zone="ch-system-util-linux swapoff">
[90aae6b]1275 <primary sortas="b-swapoff">swapoff</primary>
1276 </indexterm>
1277 </listitem>
1278 </varlistentry>
1279
[ddd5542]1280 <varlistentry id="swapon">
1281 <term><command>swapon</command></term>
1282 <listitem>
[9bb4939]1283 <para>Enables devices and files for paging and swapping, and
[ddd5542]1284 lists the devices and files currently in use</para>
[e1428f3]1285 <indexterm zone="ch-system-util-linux swapon">
[ddd5542]1286 <primary sortas="b-swapon">swapon</primary>
1287 </indexterm>
1288 </listitem>
1289 </varlistentry>
1290
[cd82ee5]1291 <varlistentry id="switch_root">
1292 <term><command>switch_root</command></term>
1293 <listitem>
1294 <para>Switches to another filesystem as the root of the mount tree</para>
[e1428f3]1295 <indexterm zone="ch-system-util-linux switch_root">
[cd82ee5]1296 <primary sortas="b-switch_root">switch_root</primary>
1297 </indexterm>
1298 </listitem>
1299 </varlistentry>
1300
[5c92d21]1301 <varlistentry id="taskset">
1302 <term><command>taskset</command></term>
1303 <listitem>
[9bb4939]1304 <para>Retrieves or sets a process's CPU affinity</para>
[e1428f3]1305 <indexterm zone="ch-system-util-linux taskset">
[5c92d21]1306 <primary sortas="b-taskset">taskset</primary>
1307 </indexterm>
1308 </listitem>
1309 </varlistentry>
1310
[50c357d3]1311 <varlistentry id="uclampset">
1312 <term><command>uclampset</command></term>
1313 <listitem>
[9bb4939]1314 <para>Manipulates the utilization clamping attributes of the
[50c357d3]1315 system or a process</para>
1316 <indexterm zone="ch-system-util-linux uclampset">
1317 <primary sortas="b-uclampset">uclampset</primary>
1318 </indexterm>
1319 </listitem>
1320 </varlistentry>
1321
[ddd5542]1322 <varlistentry id="ul">
1323 <term><command>ul</command></term>
1324 <listitem>
1325 <para>A filter for translating underscores into escape sequences
1326 indicating underlining for the terminal in use</para>
[e1428f3]1327 <indexterm zone="ch-system-util-linux ul">
[ddd5542]1328 <primary sortas="b-ul">ul</primary>
1329 </indexterm>
1330 </listitem>
1331 </varlistentry>
1332
1333 <varlistentry id="umount">
1334 <term><command>umount</command></term>
1335 <listitem>
1336 <para>Disconnects a file system from the system's file tree</para>
[e1428f3]1337 <indexterm zone="ch-system-util-linux umount">
[ddd5542]1338 <primary sortas="b-umount">umount</primary>
1339 </indexterm>
1340 </listitem>
1341 </varlistentry>
1342
[040ecb6]1343 <varlistentry id="uname26">
1344 <term><command>uname26</command></term>
1345 <listitem>
1346 <para>A symbolic link to setarch</para>
1347 <indexterm zone="ch-system-util-linux uname26">
1348 <primary sortas="b-uname26">uname26</primary>
1349 </indexterm>
1350 </listitem>
1351 </varlistentry>
1352
[9d42ad9]1353 <varlistentry id="unshare">
1354 <term><command>unshare</command></term>
1355 <listitem>
1356 <para>Runs a program with some namespaces unshared from parent</para>
[e1428f3]1357 <indexterm zone="ch-system-util-linux unshare">
[9d42ad9]1358 <primary sortas="b-unshare">unshare</primary>
1359 </indexterm>
1360 </listitem>
1361 </varlistentry>
1362
[ca101ad]1363 <varlistentry id="utmpdump">
1364 <term><command>utmpdump</command></term>
1365 <listitem>
[9bb4939]1366 <para>Displays the content of the given login file in a
[ca101ad]1367 user-friendly format</para>
1368 <indexterm zone="ch-system-util-linux utmpdump">
1369 <primary sortas="b-utmpdump">utmpdump</primary>
1370 </indexterm>
1371 </listitem>
1372 </varlistentry>
1373
[cd82ee5]1374 <varlistentry id="uuidd">
1375 <term><command>uuidd</command></term>
1376 <listitem>
1377 <para>A daemon used by the UUID library to generate time-based
[0d84af1]1378 UUIDs in a secure and guaranteed-unique fashion</para>
[e1428f3]1379 <indexterm zone="ch-system-util-linux uuidd">
[cd82ee5]1380 <primary sortas="b-uuidd">uuidd</primary>
1381 </indexterm>
1382 </listitem>
1383 </varlistentry>
1384
1385 <varlistentry id="uuidgen">
1386 <term><command>uuidgen</command></term>
1387 <listitem>
[9bb4939]1388 <para>Creates new UUIDs. Each new UUID is a random number likely to be
[cd82ee5]1389 unique among all UUIDs created, on the local system and on other
[9bb4939]1390 systems, in the past and in the future, with extremely high
[e8f0a1b]1391 probability (2<superscript>128</superscript> UUIDs are
1392 possible)</para>
[e1428f3]1393 <indexterm zone="ch-system-util-linux uuidgen">
[cd82ee5]1394 <primary sortas="b-uuidgen">uuidgen</primary>
1395 </indexterm>
1396 </listitem>
1397 </varlistentry>
1398
[78cc3be]1399 <varlistentry id="uuidparse">
1400 <term><command>uuidparse</command></term>
1401 <listitem>
[9bb4939]1402 <para>A utility to parse unique identifiers</para>
[78cc3be]1403 <indexterm zone="ch-system-util-linux uuidparse">
1404 <primary sortas="b-uuidparse">uuidparse</primary>
1405 </indexterm>
1406 </listitem>
1407 </varlistentry>
1408
[5c92d21]1409 <varlistentry id="wall">
1410 <term><command>wall</command></term>
[ddd5542]1411 <listitem>
[5c92d21]1412 <para>Displays the contents of a file or, by default, its standard
1413 input, on the terminals of all currently logged in users</para>
[e1428f3]1414 <indexterm zone="ch-system-util-linux wall">
[5c92d21]1415 <primary sortas="b-wall">wall</primary>
[ddd5542]1416 </indexterm>
1417 </listitem>
1418 </varlistentry>
1419
[ca101ad]1420 <varlistentry id="wdctl">
1421 <term><command>wdctl</command></term>
1422 <listitem>
1423 <para>Shows hardware watchdog status</para>
1424 <indexterm zone="ch-system-util-linux wdctl">
1425 <primary sortas="b-wdctl">wdctl</primary>
1426 </indexterm>
1427 </listitem>
1428 </varlistentry>
1429
[ddd5542]1430 <varlistentry id="whereis">
1431 <term><command>whereis</command></term>
1432 <listitem>
1433 <para>Reports the location of the binary, source, and man page
[9bb4939]1434 files for the given command</para>
[e1428f3]1435 <indexterm zone="ch-system-util-linux whereis">
[ddd5542]1436 <primary sortas="b-whereis">whereis</primary>
1437 </indexterm>
1438 </listitem>
1439 </varlistentry>
1440
[9d42ad9]1441 <varlistentry id="wipefs">
1442 <term><command>wipefs</command></term>
1443 <listitem>
1444 <para>Wipes a filesystem signature from a device</para>
[e1428f3]1445 <indexterm zone="ch-system-util-linux wipefs">
[9d42ad9]1446 <primary sortas="b-wipefs">wipefs</primary>
1447 </indexterm>
1448 </listitem>
1449 </varlistentry>
1450
[0c90d60]1451 <varlistentry id="x86_64">
1452 <term><command>x86_64</command></term>
[ddd5542]1453 <listitem>
[0c90d60]1454 <para>A symbolic link to setarch</para>
1455 <indexterm zone="ch-system-util-linux x86_64">
1456 <primary sortas="b-x86_64">x86_64</primary>
[ddd5542]1457 </indexterm>
1458 </listitem>
1459 </varlistentry>
1460
[eb8b1c5]1461 <varlistentry id="zramctl">
1462 <term><command>zramctl</command></term>
1463 <listitem>
[d672ab7]1464 <para>A program to set up and control zram (compressed ram disk)
[eb8b1c5]1465 devices</para>
1466 <indexterm zone="ch-system-util-linux zramctl">
1467 <primary sortas="b-zramctl">zramctl</primary>
1468 </indexterm>
1469 </listitem>
1470 </varlistentry>
1471
[cd82ee5]1472 <varlistentry id="libblkid">
1473 <term><filename class="libraryfile">libblkid</filename></term>
1474 <listitem>
1475 <para>Contains routines for device identification and token
1476 extraction</para>
[e1428f3]1477 <indexterm zone="ch-system-util-linux libblkid">
[cd82ee5]1478 <primary sortas="c-libblkid">libblkid</primary>
1479 </indexterm>
1480 </listitem>
1481 </varlistentry>
1482
[eb8b1c5]1483 <varlistentry id="libfdisk">
1484 <term><filename class="libraryfile">libfdisk</filename></term>
1485 <listitem>
1486 <para>Contains routines for manipulating partition tables</para>
1487 <indexterm zone="ch-system-util-linux libfdisk">
1488 <primary sortas="c-libfdisk">libfdisk</primary>
1489 </indexterm>
1490 </listitem>
1491 </varlistentry>
1492
[12d9bda6]1493 <varlistentry id="libmount">
1494 <term><filename class="libraryfile">libmount</filename></term>
1495 <listitem>
1496 <para>Contains routines for block device mounting and
1497 unmounting</para>
1498 <indexterm zone="ch-system-util-linux libmount">
1499 <primary sortas="c-libmount">libmount</primary>
1500 </indexterm>
1501 </listitem>
1502 </varlistentry>
1503
[eb8b1c5]1504 <varlistentry id="libsmartcols">
1505 <term><filename class="libraryfile">libsmartcols</filename></term>
1506 <listitem>
1507 <para>Contains routines for aiding screen output in tabular form</para>
1508 <indexterm zone="ch-system-util-linux libsmartcols">
1509 <primary sortas="c-libsmartcols">libsmartcols</primary>
1510 </indexterm>
1511 </listitem>
1512 </varlistentry>
1513
[cd82ee5]1514 <varlistentry id="libuuid">
1515 <term><filename class="libraryfile">libuuid</filename></term>
1516 <listitem>
1517 <para>Contains routines for generating unique identifiers for objects
1518 that may be accessible beyond the local system</para>
[e1428f3]1519 <indexterm zone="ch-system-util-linux libuuid">
[cd82ee5]1520 <primary sortas="c-libuuid">libuuid</primary>
1521 </indexterm>
1522 </listitem>
1523 </varlistentry>
1524
[ddd5542]1525 </variablelist>
1526
1527 </sect2>
[673b0d8]1528
1529</sect1>
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