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<article class="manpage"><p>
</p><div class="head" role="doc-pageheader" aria-label="Manual header
line"><span class="head-ltitle">MAN(1)</span> <span class="head-vol">General
Commands Manual</span> <span class="head-rtitle">MAN(1)</span></div>
<main class="manual-text">
<section class="Sh">
<h2 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h2>
<p class="Pp"><code class="Nm">man</code> —
<span class="Nd" role="doc-subtitle">display manual pages</span></p>
</section>
<section class="Sh">
<h2 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h2>
<table class="Nm">
<tbody><tr>
<td><code class="Nm">man</code></td>
<td>[<code class="Fl">-acfhklw</code>] [<code class="Fl">-C</code>
<var class="Ar">file</var>] [<code class="Fl">-M</code>
<var class="Ar">path</var>] [<code class="Fl">-m</code>
<var class="Ar">path</var>] [<code class="Fl">-S</code>
<var class="Ar">subsection</var>] [[<code class="Fl">-s</code>]
<var class="Ar">section</var>] <var class="Ar">name ...</var></td>
</tr>
</tbody></table>
</section>
<h2 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h2>
The <code class="Nm">man</code> utility displays the manual page entitled
<var class="Ar">name</var>. Pages may be selected according to a specific
category (<var class="Ar">section</var>) or machine architecture
(<var class="Ar">subsection</var>).
<p class="Pp">The options are as follows:</p>
<dl class="Bl-tag">
<dt id="a"><a class="permalink" href="#a"><code class="Fl">-a</code></a></dt>
<dd>Display all matching manual pages.</dd>
<dt id="C"><a class="permalink" href="#C"><code class="Fl">-C</code></a>
<var class="Ar">file</var></dt>
<dd>Use the specified <var class="Ar">file</var> instead of the default
configuration file. This permits users to configure their own manual
environment. See <a class="Xr" aria-label="man.conf, section
5">man.conf(5)</a> for a description of the contents of this file.</dd>
<dt id="c"><a class="permalink" href="#c"><code class="Fl">-c</code></a></dt>
<dd>Copy the manual page to the standard output instead of using
<a class="Xr" aria-label="less, section 1">less(1)</a> to paginate it.
This is done by default if the standard output is not a terminal device.
<p class="Pp">When using <code class="Fl">-c</code>, most terminal devices
are unable to show the markup. To print the output of
<code class="Nm">man</code> to the terminal with markup but without
using a pager, pipe it to <a class="Xr" aria-label="ul, section
1">ul(1)</a>. To remove the markup, pipe the output to
<a class="Xr" aria-label="col, section 1">col(1)</a>
<code class="Fl">-b</code> instead.</p>
</dd>
<dt id="f"><a class="permalink" href="#f"><code class="Fl">-f</code></a></dt>
<dd>A synonym for <a class="Xr" aria-label="whatis, section 1">whatis(1)</a>.
It searches for <var class="Ar">name</var> in manual page names and
displays the header lines from all matching pages. The search is case
insensitive and matches whole words only.</dd>
<dt id="h"><a class="permalink" href="#h"><code class="Fl">-h</code></a></dt>
<dd>Display only the SYNOPSIS lines of the requested manual pages. Implies
<code class="Fl">-a</code> and <code class="Fl">-c</code>.</dd>
<dt id="k"><a class="permalink" href="#k"><code class="Fl">-k</code></a></dt>
<dd>A synonym for <a class="Xr" aria-label="apropos, section
1">apropos(1)</a>. Instead of <var class="Ar">name</var>, an expression
can be provided using the syntax described in the
<a class="Xr" aria-label="apropos, section 1">apropos(1)</a> manual. By
default, it displays the header lines of all matching pages.</dd>
<dt id="l"><a class="permalink" href="#l"><code class="Fl">-l</code></a></dt>
<dd>A synonym for <a class="Xr" aria-label="mandoc, section 1">mandoc(1)</a>.
The <var class="Ar">name</var> arguments are interpreted as filenames. No
search is done and <var class="Ar">file</var>, <var class="Ar">path</var>,
<var class="Ar">section</var>, <var class="Ar">subsection</var>, and
<code class="Fl">-w</code> are ignored. This option implies
<code class="Fl">-a</code>.</dd>
<dt id="M"><a class="permalink" href="#M"><code class="Fl">-M</code></a>
<var class="Ar">path</var></dt>
<dd>Override the list of directories to search for manual pages. The supplied
<var class="Ar">path</var> must be a colon
(‘<code class="Li">:</code>’) separated list of directories.
This option also overrides the environment variable
<code class="Ev">MANPATH</code> and any directories specified in the
<a class="Xr" aria-label="man.conf, section 5">man.conf(5)</a> file.</dd>
<dt id="m"><a class="permalink" href="#m"><code class="Fl">-m</code></a>
<var class="Ar">path</var></dt>
<dd>Augment the list of directories to search for manual pages. The supplied
<var class="Ar">path</var> must be a colon
(‘<code class="Li">:</code>’) separated list of directories.
These directories will be searched before those specified using the
<code class="Fl">-M</code> option, the <code class="Ev">MANPATH</code>
environment variable, the <a class="Xr" aria-label="man.conf, section
5">man.conf(5)</a> file, or the default directories.</dd>
<dt id="S"><a class="permalink" href="#S"><code class="Fl">-S</code></a>
<var class="Ar">subsection</var></dt>
<dd>Only show pages for the specified <a class="Xr" aria-label="machine,
section 1">machine(1)</a> architecture. <var class="Ar">subsection</var>
is case insensitive.
<p class="Pp">By default manual pages for all architectures are installed.
Therefore this option can be used to view pages for one architecture
whilst using another.</p>
<p class="Pp">This option overrides the <code class="Ev">MACHINE</code>
environment variable.</p>
</dd>
<dt id="s">[<code class="Fl">-s</code>] <var class="Ar">section</var></dt>
<dd>Only select manuals from the specified <var class="Ar">section</var>. The
currently available sections are:
<p class="Pp"></p>
<div class="Bd-indent">
<dl class="Bl-tag Bl-compact">
<dt>1</dt>
<dd>General commands (tools and utilities).</dd>
<dt>2</dt>
<dd>System calls and error numbers.</dd>
<dt>3</dt>
<dd>Library functions.</dd>
<dt>3p</dt>
<dd><a class="Xr" aria-label="perl, section 1">perl(1)</a> programmer's
reference guide.</dd>
<dt>4</dt>
<dd>Device drivers.</dd>
<dt>5</dt>
<dd>File formats.</dd>
<dt>6</dt>
<dd>Games.</dd>
<dt>7</dt>
<dd>Miscellaneous information.</dd>
<dt>8</dt>
<dd>System maintenance and operation commands.</dd>
<dt>9</dt>
<dd>Kernel internals.</dd>
</dl>
</div>
</dd>
<dt id="w"><a class="permalink" href="#w"><code class="Fl">-w</code></a></dt>
<dd>List the pathnames of all matching manual pages instead of displaying any
of them. If no <var class="Ar">name</var> is given, list the directories
that would be searched.</dd>
</dl>
<p class="Pp">The options <code class="Fl">-IKOTW</code> are also supported and
are documented in <a class="Xr" aria-label="mandoc, section
1">mandoc(1)</a>. The options <code class="Fl">-fkl</code> are mutually
exclusive and override each other.</p>
<p class="Pp">The search starts with the <code class="Fl">-m</code> argument if
provided, then continues with the <code class="Fl">-M</code> argument, the
<code class="Ev">MANPATH</code> variable, the
<code class="Ic">manpath</code> entries in the
<a class="Xr" aria-label="man.conf, section 5">man.conf(5)</a> file, or with
<span class="Pa">/usr/share/man</span>:<span class="Pa">/usr/X11R6/man</span>:<span class="Pa">/usr/local/man</span>
by default. Within each of these, directories are searched in the order
provided. Within each directory, the search proceeds according to the
following list of sections: 1, 8, 6, 2, 3, 5, 7, 4, 9, 3p. The first match
found is shown.</p>
<p class="Pp">The <a class="Xr" aria-label="mandoc.db, section
5">mandoc.db(5)</a> database is used for looking up manual page entries. In
cases where the database is absent, outdated, or corrupt,
<code class="Nm">man</code> falls back to looking for files called
<var class="Ar">name</var>.<var class="Ar">section</var>. If both a
formatted and an unformatted version of the same manual page, for example
<span class="Pa">cat1/foo.0</span> and <span class="Pa">man1/foo.1</span>,
exist in the same directory, only the unformatted version is used. The
database is kept up to date with <a class="Xr" aria-label="makewhatis,
section 8">makewhatis(8)</a>, which is run by the
<a class="Xr" aria-label="weekly, section 8">weekly(8)</a> maintenance
script.</p>
<p class="Pp">Guidelines for writing man pages can be found in
<a class="Xr" aria-label="mdoc, section 7">mdoc(7)</a>.</p>
<section class="Sh">
<h2 class="Sh" id="ENVIRONMENT"><a class="permalink" href="#ENVIRONMENT">ENVIRONMENT</a></h2>
<dl class="Bl-tag">
<dt id="MACHINE"><a class="permalink" href="#MACHINE"><code class="Ev">MACHINE</code></a></dt>
<dd>As some manual pages are intended only for specific architectures,
<code class="Nm">man</code> searches any subdirectories, with the same
name as the current architecture, in every directory which it searches.
Machine specific areas are checked before general areas. The current
machine type may be overridden by setting the environment variable
<code class="Ev">MACHINE</code> to the name of a specific architecture, or
with the <code class="Fl">-S</code> option.
<code class="Ev">MACHINE</code> is case insensitive.</dd>
<dt id="MANPAGER"><a class="permalink" href="#MANPAGER"><code class="Ev">MANPAGER</code></a></dt>
<dd>Any non-empty value of the environment variable
<code class="Ev">MANPAGER</code> is used instead of the standard
pagination program, <a class="Xr" aria-label="less, section
1">less(1)</a>. If <a class="Xr" aria-label="less, section 1">less(1)</a>
is used, the interactive <code class="Ic">:t</code> command can be used to
go to the definitions of various terms, for example command line options,
command modifiers, internal commands, environment variables, function
names, preprocessor macros, <a class="Xr" aria-label="errno, section
2">errno(2)</a> values, and some other emphasized words. Some terms may
have defining text at more than one place. In that case, the
<a class="Xr" aria-label="less, section 1">less(1)</a> interactive
commands <code class="Ic">t</code> and <code class="Ic">T</code> can be
used to move to the next and to the previous place providing information
about the term last searched for with <code class="Ic">:t</code>. The
<code class="Fl">-O</code>
<code class="Cm">tag</code>[=<var class="Ar">term</var>] option documented
in the <a class="Xr" aria-label="mandoc, section 1">mandoc(1)</a> manual
opens a manual page at the definition of a specific
<var class="Ar">term</var> rather than at the beginning.</dd>
<dt id="MANPATH"><a class="permalink" href="#MANPATH"><code class="Ev">MANPATH</code></a></dt>
<dd>Override the standard search path which is either specified in
<a class="Xr" aria-label="man.conf, section 5">man.conf(5)</a> or the
default path. The format of <code class="Ev">MANPATH</code> is a colon
(‘<code class="Li">:</code>’) separated list of directories.
Invalid directories are ignored. Overridden by <code class="Fl">-M</code>,
ignored if <code class="Fl">-l</code> is specified.
<p class="Pp">If <code class="Ev">MANPATH</code> begins with a colon, it is
appended to the standard path; if it ends with a colon, it is prepended
to the standard path; or if it contains two adjacent colons, the
standard path is inserted between the colons.</p>
</dd>
<dt id="PAGER"><a class="permalink" href="#PAGER"><code class="Ev">PAGER</code></a></dt>
<dd>Specifies the pagination program to use when
<code class="Ev">MANPAGER</code> is not defined. If neither PAGER nor
MANPAGER is defined, <a class="Xr" aria-label="less, section
1">less(1)</a> is used.</dd>
</dl>
</section>
<section class="Sh">
<h2 class="Sh" id="FILES"><a class="permalink" href="#FILES">FILES</a></h2>
<dl class="Bl-tag Bl-compact">
<dt><span class="Pa">/etc/man.conf</span></dt>
<dd>default <code class="Nm">man</code> configuration file</dd>
</dl>
</section>
<section class="Sh">
<h2 class="Sh" id="EXIT_STATUS"><a class="permalink" href="#EXIT_STATUS">EXIT
STATUS</a></h2>
<p class="Pp">The <code class="Nm">man</code> utility exits 0 on success,
and >0 if an error occurs. See <a class="Xr" aria-label="mandoc,
section 1">mandoc(1)</a> for details.</p>
</section>
<section class="Sh">
<h2 class="Sh" id="EXAMPLES"><a class="permalink" href="#EXAMPLES">EXAMPLES</a></h2>
<p class="Pp">Format a page for pasting extracts into an email message —
avoid printing any UTF-8 characters, reduce the width to ease quoting in
replies, and remove markup:</p>
<p class="Pp"></p>
<div class="Bd Bd-indent"><code class="Li">$ man -T ascii -O width=65 pledge |
col -b</code></div>
<p class="Pp">Read a typeset page in a PDF viewer:</p>
<p class="Pp"></p>
<div class="Bd Bd-indent"><code class="Li">$ MANPAGER=mupdf man -T pdf
lpd</code></div>
</section>
<section class="Sh">
<h2 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE
ALSO</a></h2>
<p class="Pp"><a class="Xr" aria-label="apropos, section 1">apropos(1)</a>,
<a class="Xr" aria-label="col, section 1">col(1)</a>,
<a class="Xr" aria-label="mandoc, section 1">mandoc(1)</a>,
<a class="Xr" aria-label="ul, section 1">ul(1)</a>,
<a class="Xr" aria-label="whereis, section 1">whereis(1)</a>,
<a class="Xr" aria-label="man.conf, section 5">man.conf(5)</a>,
<a class="Xr" aria-label="mdoc, section 7">mdoc(7)</a></p>
</section>
<section class="Sh">
<h2 class="Sh" id="STANDARDS"><a class="permalink" href="#STANDARDS">STANDARDS</a></h2>
<p class="Pp">The <code class="Nm">man</code> utility is compliant with the
<span class="St">IEEE Std 1003.1-2008 (“POSIX.1”)</span>
specification.</p>
<p class="Pp">The flags [<code class="Fl">-aCcfhIKlMmOSsTWw</code>], as well as
the environment variables <code class="Ev">MACHINE</code>,
<code class="Ev">MANPAGER</code>, and <code class="Ev">MANPATH</code>, are
extensions to that specification.</p>
</section>
<section class="Sh">
<h2 class="Sh" id="HISTORY"><a class="permalink" href="#HISTORY">HISTORY</a></h2>
<p class="Pp">A <code class="Nm">man</code> command first appeared in
<span class="Ux">Version 2 AT&T UNIX</span>.</p>
<p class="Pp">The <code class="Fl">-w</code> option first appeared in
<span class="Ux">Version 7 AT&T UNIX</span>;
<code class="Fl">-f</code> and <code class="Fl">-k</code> in
<span class="Pa">/usr/usb/man</span> in <span class="Ux">4.0BSD</span>;
<code class="Fl">-M</code> in <span class="Ux">4.3BSD</span>;
<code class="Fl">-a</code> in <span class="Ux">4.3BSD-Tahoe</span>;
<code class="Fl">-c</code> and <code class="Fl">-m</code> in
<span class="Ux">4.3BSD-Reno</span>; <code class="Fl">-h</code> in
<span class="Ux">4.3BSD-Net/2</span>; <code class="Fl">-C</code> in
<span class="Ux">NetBSD 1.0</span>; <code class="Fl">-s</code> and
<code class="Fl">-S</code> in <span class="Ux">OpenBSD 2.3</span>; and
<code class="Fl">-I</code>, <code class="Fl">-K</code>,
<code class="Fl">-l</code>, <code class="Fl">-O</code>, and
<code class="Fl">-W</code> in <span class="Ux">OpenBSD 5.7</span>. The
<code class="Fl">-T</code> option first appeared in
<span class="Ux">AT&T System III UNIX</span> and was also added
in <span class="Ux">OpenBSD 5.7</span>.</p>
</section>
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2022</span> <span class="foot-os">Linux 5.10.0-28-cloud-amd64</span></div>
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