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Available in 16 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-16" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">16 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/Who" title="Who – Belarusian" lang="be" hreflang="be" data-title="Who" data-language-autonym="Беларуская" data-language-local-name="Belarusian" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Who_(Unix)" title="Who (Unix) – Czech" lang="cs" hreflang="cs" data-title="Who (Unix)" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Who_(Unix)" title="Who (Unix) – German" lang="de" hreflang="de" data-title="Who (Unix)" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/Who_(Unix)" title="Who (Unix) – Greek" lang="el" hreflang="el" data-title="Who (Unix)" data-language-autonym="Ελληνικά" data-language-local-name="Greek" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Who_(Unix)" title="Who (Unix) – Spanish" lang="es" hreflang="es" data-title="Who (Unix)" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Who_(Unix)" title="Who (Unix) – French" lang="fr" hreflang="fr" data-title="Who (Unix)" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/Who_(%EC%9C%A0%EB%8B%89%EC%8A%A4)" title="Who (유닉스) – Korean" lang="ko" hreflang="ko" data-title="Who (유닉스)" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Who_(Unix)" title="Who (Unix) – Italian" lang="it" hreflang="it" data-title="Who (Unix)" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/Who_(%D7%A4%D7%A7%D7%95%D7%93%D7%94)" title="Who (פקודה) – Hebrew" lang="he" hreflang="he" data-title="Who (פקודה)" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Who_(Unix)" title="Who (Unix) – Hungarian" lang="hu" hreflang="hu" data-title="Who (Unix)" data-language-autonym="Magyar" data-language-local-name="Hungarian" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/Who_(UNIX)" title="Who (UNIX) – Japanese" lang="ja" hreflang="ja" data-title="Who (UNIX)" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Who_(Unix)" title="Who (Unix) – Polish" lang="pl" hreflang="pl" data-title="Who (Unix)" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Who_(Unix)" title="Who (Unix) – Portuguese" lang="pt" hreflang="pt" data-title="Who (Unix)" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Who_(Unix)" title="Who (Unix) – Romanian" lang="ro" hreflang="ro" data-title="Who (Unix)" data-language-autonym="Română" data-language-local-name="Romanian" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/Who" title="Who – Russian" lang="ru" hreflang="ru" data-title="Who" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/Who_(Unix)" title="Who (Unix) – Chinese" lang="zh" hreflang="zh" data-title="Who (Unix)" data-language-autonym="中文" data-language-local-name="Chinese" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q311681#sitelinks-wikipedia" title="Edit interlanguage links" class="wbc-editpage">Edit links</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> 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.infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox vevent"><caption class="infobox-title summary">who</caption><tbody><tr><td colspan="2" class="infobox-image logo"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:Who_screenshot.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/11/Who_screenshot.png/220px-Who_screenshot.png" decoding="async" width="220" height="89" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/11/Who_screenshot.png/330px-Who_screenshot.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/11/Who_screenshot.png/440px-Who_screenshot.png 2x" data-file-width="639" data-file-height="259" /></a></span><div class="infobox-caption">The <code class="mw-highlight mw-highlight-lang-text mw-content-ltr" style="" dir="ltr">who</code> command</div></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Programmer" title="Programmer">Developer(s)</a></th><td class="infobox-data"><a href="/wiki/AT%26T_Bell_Laboratories" class="mw-redirect" title="AT&T Bell Laboratories">AT&T Bell Laboratories</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Initial release</th><td class="infobox-data">November 3, 1971<span class="noprint">; 53 years ago</span><span style="display:none"> (<span class="bday dtstart published updated">1971-11-03</span>)</span></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Operating_system" title="Operating system">Operating system</a></th><td class="infobox-data"><a href="/wiki/Multics" title="Multics">Multics</a>, <a href="/wiki/Unix" title="Unix">Unix</a>, <a href="/wiki/Unix-like" title="Unix-like">Unix-like</a>, <a href="/wiki/Plan_9_from_Bell_Labs" title="Plan 9 from Bell Labs">Plan 9</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Computing_platform" title="Computing platform">Platform</a></th><td class="infobox-data"><a href="/wiki/Cross-platform" class="mw-redirect" title="Cross-platform">Cross-platform</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_categories#Categorization_approaches" title="Software categories">Type</a></th><td class="infobox-data"><a href="/wiki/Command_(computing)" title="Command (computing)">Command</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_license" title="Software license">License</a></th><td class="infobox-data"><a href="/wiki/Coreutils" class="mw-redirect" title="Coreutils">coreutils</a>: <a href="/wiki/GPLv3%2B" class="mw-redirect" title="GPLv3+">GPLv3+</a></td></tr></tbody></table> <p>The standard <a href="/wiki/Unix" title="Unix">Unix</a> command <code>who</code> displays a list of users who are currently logged into the computer. </p><p>The <code>who</code> command is related to the command <style data-mw-deduplicate="TemplateStyles:r886049734">.mw-parser-output .monospaced{font-family:monospace,monospace}</style><span class="monospaced"><a href="/wiki/W_(Unix)" title="W (Unix)">w</a></span>, which provides the same information but also displays additional data and statistics. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="History">History</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Who_(Unix)&action=edit&section=1" title="Edit section: History"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>A <code class="mw-highlight mw-highlight-lang-text mw-content-ltr" style="" dir="ltr">who</code> command that displays the names of users logged in was first implemented within <a href="/wiki/Multics" title="Multics">Multics</a>.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> Later, it appeared in <a href="/wiki/Ancient_UNIX" title="Ancient UNIX">Version 1 Unix</a><sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> and became part of the <a href="/wiki/X/Open" title="X/Open">X/Open</a> Portability Guide since issue 2 of 1987. It was inherited into the first version of POSIX.1 and the <a href="/wiki/Single_Unix_Specification" class="mw-redirect" title="Single Unix Specification">Single Unix Specification</a>.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p><p>The version of <code>who</code> bundled in <a href="/wiki/GNU" title="GNU">GNU</a> <a href="/wiki/Coreutils" class="mw-redirect" title="Coreutils">coreutils</a> was written by Joseph Arceneaux, David MacKenzie, and Michael Stone.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Specification">Specification</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Who_(Unix)&action=edit&section=2" title="Edit section: Specification"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The <a href="/wiki/Single_UNIX_Specification" title="Single UNIX Specification">Single UNIX Specification</a> (SUS) specifies that <code>who</code> should list information about accessible users. The <a href="/w/index.php?title=X/Open_System_Interfaces_Extension&action=edit&redlink=1" class="new" title="X/Open System Interfaces Extension (page does not exist)">XSI</a> extension also specifies that the data of the username, terminal, login time, process ID, and time since last activity occurred on the terminal, furthermore, an alternate system database used for user information can be specified as an optional argument to <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886049734"><span class="monospaced">who</span>. </p><p>The command can be invoked with the arguments <code>am i</code> or <code>am I</code> (so it is invoked as <code>who am i</code> or <code>who am I</code>), showing information about the current terminal only (see the command <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886049734"><span class="monospaced"><a href="/wiki/Tty_(Unix)" title="Tty (Unix)">tty</a></span> and the <code>-m</code> option below, of which this invocation is equivalent). </p> <div class="mw-heading mw-heading2"><h2 id="Usage">Usage</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Who_(Unix)&action=edit&section=3" title="Edit section: Usage"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The SUS without extensions only specifies the following <code>-m</code>, <code>-T</code>, and <code>-u</code> options, all other options are specified in the XSI extension. </p> <dl><dd><code>-a</code>, process the system database used for user information with the <code>-b</code>, <code>-d</code>, <code>-l</code>, <code>-p</code>, <code>-r</code>, <code>-t</code>, <code>-T</code> and <code>-u</code>.</dd> <dd><code>-b</code>, show time when system was last rebooted</dd> <dd><code>-d</code>, show <a href="/wiki/Zombie_process" title="Zombie process">zombie processes</a> and details</dd> <dd><code>-H</code>, show column headers</dd> <dd><code>-l</code>, show terminals where a user can log in</dd> <dd><code>-m</code>, show information about the current terminal only</dd> <dd><code>-p</code>, show active processes</dd> <dd><code>-q</code>, quick format, show only names and the number of all users logged on, disables all other options; equivalent to <b>users</b> <a href="/wiki/Command_line_interface" class="mw-redirect" title="Command line interface">command line</a> utility</dd> <dd><code>-r</code>, show runlevel of the <a href="/w/index.php?title=Init_(Unix)&action=edit&redlink=1" class="new" title="Init (Unix) (page does not exist)">init</a> process.</dd> <dd><code>-s</code>, (default) show only name, terminal, and time details</dd> <dd><code>-t</code>, show when system clock was last changed</dd> <dd><code>-T</code>, show details of each terminal in a standard format (see note in Examples section)</dd> <dd><code>-u</code>, show idle time; XSI shows users logged in and displays information whether the terminal has been used recently or not</dd></dl> <p>Other Unix and <a href="/wiki/Unix-like" title="Unix-like">Unix-like</a> operating systems may add extra options. <a href="/wiki/GNU" title="GNU">GNU</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886049734"><span class="monospaced">who</span> includes a <code>-i</code> option behaving similarly to <code>-u</code> and a <code>-w</code> option displaying whether the user listed accepts messages (the SUS displays this when <code>-T</code> is specified), yet <a href="/wiki/GNU" title="GNU">GNU</a> <code>who</code> and <a href="/wiki/BSD" class="mw-redirect" title="BSD">BSD</a> <code>who</code> both omit a number of the above options (such as <code>-a</code>, <code>-b</code>, <code>-d</code>, and others); <a href="/wiki/GNU" title="GNU">GNU</a> <code>who</code> instead uses <code>-l</code> to perform DNS lookups on hostnames listed. </p> <div class="mw-heading mw-heading2"><h2 id="Output">Output</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Who_(Unix)&action=edit&section=4" title="Edit section: Output"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The SUS without extensions specifies that the output format is to be "implementation-defined". The XSI extension specifies a format, but notes that it is not fully specified; delimiters and field lengths are not precisely specified. Thus, the format of the output differs considerably among Unix implementations. </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Who_(Unix)&action=edit&section=5" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/List_of_Unix_commands" class="mw-redirect" title="List of Unix commands">List of Unix commands</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Who_(Unix)&action=edit&section=6" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://www.multicians.org/multics-commands.html">Multics Commands</a></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><span class="plainlinksneverexpand"><code><a rel="nofollow" class="external text" href="https://www.freebsd.org/cgi/man.cgi?query=who&sektion=1">who(1)</a></code></span> – <a href="/wiki/FreeBSD" title="FreeBSD">FreeBSD</a> General Commands <a href="/wiki/Man_page" title="Man page">Manual</a></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><span class="plainlinksneverexpand"><code><a rel="nofollow" class="external text" href="https://pubs.opengroup.org/onlinepubs/9799919799/utilities/who.html">who</a></code></span> – Shell and Utilities Reference, <a href="/wiki/Single_Unix_Specification" class="mw-redirect" title="Single Unix Specification">The Single UNIX Specification</a>, Version 4 from <a href="/wiki/The_Open_Group" title="The Open Group">The Open Group</a></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><span class="plainlinksneverexpand"><code><a rel="nofollow" class="external text" href="https://manned.org/who.1">who(1)</a></code></span> – <a href="/wiki/Linux" title="Linux">Linux</a> User <a href="/wiki/Man_page" title="Man page">Manual</a> – User Commands</span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Who_(Unix)&action=edit&section=7" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1235681985">.mw-parser-output .side-box{margin:4px 0;box-sizing:border-box;border:1px solid #aaa;font-size:88%;line-height:1.25em;background-color:var(--background-color-interactive-subtle,#f8f9fa);display:flow-root}.mw-parser-output .side-box-abovebelow,.mw-parser-output .side-box-text{padding:0.25em 0.9em}.mw-parser-output .side-box-image{padding:2px 0 2px 0.9em;text-align:center}.mw-parser-output .side-box-imageright{padding:2px 0.9em 2px 0;text-align:center}@media(min-width:500px){.mw-parser-output .side-box-flex{display:flex;align-items:center}.mw-parser-output .side-box-text{flex:1;min-width:0}}@media(min-width:720px){.mw-parser-output .side-box{width:238px}.mw-parser-output .side-box-right{clear:right;float:right;margin-left:1em}.mw-parser-output .side-box-left{margin-right:1em}}</style><style data-mw-deduplicate="TemplateStyles:r1237033735">@media print{body.ns-0 .mw-parser-output .sistersitebox{display:none!important}}@media screen{html.skin-theme-clientpref-night .mw-parser-output .sistersitebox img[src*="Wiktionary-logo-en-v2.svg"]{background-color:white}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .sistersitebox img[src*="Wiktionary-logo-en-v2.svg"]{background-color:white}}</style><div class="side-box side-box-right plainlinks sistersitebox"><style data-mw-deduplicate="TemplateStyles:r1126788409">.mw-parser-output .plainlist ol,.mw-parser-output .plainlist ul{line-height:inherit;list-style:none;margin:0;padding:0}.mw-parser-output .plainlist ol li,.mw-parser-output .plainlist ul li{margin-bottom:0}</style> <div class="side-box-flex"> <div class="side-box-image"><span class="noviewer" typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/d/df/Wikibooks-logo-en-noslogan.svg/40px-Wikibooks-logo-en-noslogan.svg.png" decoding="async" width="40" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/df/Wikibooks-logo-en-noslogan.svg/60px-Wikibooks-logo-en-noslogan.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/df/Wikibooks-logo-en-noslogan.svg/80px-Wikibooks-logo-en-noslogan.svg.png 2x" data-file-width="400" data-file-height="400" /></span></span></div> <div class="side-box-text plainlist">The Wikibook <i><a href="https://en.wikibooks.org/wiki/Guide_to_Unix" class="extiw" title="wikibooks:Guide to Unix">Guide to Unix</a></i> has a page on the topic of: <i><b><a href="https://en.wikibooks.org/wiki/Guide_to_Unix/Commands" class="extiw" title="wikibooks:Guide to Unix/Commands">Commands</a></b></i></div></div> </div> <ul><li><span class="plainlinksneverexpand"><code><a rel="nofollow" class="external text" href="https://pubs.opengroup.org/onlinepubs/9799919799/utilities/who.html">who</a></code></span> – Shell and Utilities Reference, <a href="/wiki/Single_Unix_Specification" class="mw-redirect" title="Single Unix Specification">The Single UNIX Specification</a>, Version 4 from <a href="/wiki/The_Open_Group" title="The Open Group">The Open Group</a></li> <li><a rel="nofollow" class="external text" href="https://www.gnu.org/software/coreutils/manual/html_node/who-invocation.html">who</a> — <a href="/wiki/Manual_page" class="mw-redirect" title="Manual page">manual page</a> from <a href="/wiki/GNU" title="GNU">GNU</a> <a href="/wiki/Coreutils" class="mw-redirect" title="Coreutils">coreutils</a></li> <li><span class="plainlinksneverexpand"><code><a rel="nofollow" class="external text" href="https://man.openbsd.org/who.1">who(1)</a></code></span> – <a href="/wiki/OpenBSD" title="OpenBSD">OpenBSD</a> General Commands <a href="/wiki/Man_page" title="Man page">Manual</a></li> <li><span class="plainlinksneverexpand"><code><a rel="nofollow" class="external text" href="https://9p.io/magic/man2html/1/who">who(1)</a></code></span> – <a href="/wiki/Plan_9_from_Bell_Labs" title="Plan 9 from Bell Labs">Plan 9</a> Programmer's Manual, Volume 1</li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul dl,.mw-parser-output .hlist ul ol,.mw-parser-output .hlist ul ul{display:inline}.mw-parser-output .hlist .mw-empty-li{display:none}.mw-parser-output .hlist dt::after{content:": "}.mw-parser-output .hlist dd::after,.mw-parser-output .hlist li::after{content:" · ";font-weight:bold}.mw-parser-output .hlist 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rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Unix_commands" title="Template:Unix commands"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Unix_commands" title="Template talk:Unix commands"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Unix_commands" title="Special:EditPage/Template:Unix commands"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Unix_command-line_interface_programs_and_shell_builtins" style="font-size:114%;margin:0 4em"><a href="/wiki/Unix" title="Unix">Unix</a> <a href="/wiki/Command-line_interface" title="Command-line interface">command-line interface</a> programs and <a href="/wiki/Shell_builtin" title="Shell builtin">shell builtins</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">File system</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Cat_(Unix)" title="Cat (Unix)">cat</a></li> <li><a href="/wiki/Chattr" title="Chattr">chattr</a></li> <li><a href="/wiki/Chmod" title="Chmod">chmod</a></li> <li><a href="/wiki/Chown" title="Chown">chown</a></li> <li><a href="/wiki/Chgrp" title="Chgrp">chgrp</a></li> <li><a href="/wiki/Cksum" title="Cksum">cksum</a></li> <li><a href="/wiki/Cmp_(Unix)" title="Cmp (Unix)">cmp</a></li> <li><a href="/wiki/Cp_(Unix)" title="Cp (Unix)">cp</a></li> <li><a href="/wiki/Dd_(Unix)" title="Dd (Unix)">dd</a></li> <li><a href="/wiki/Du_(Unix)" title="Du (Unix)">du</a></li> <li><a href="/wiki/Df_(Unix)" title="Df (Unix)">df</a></li> <li><a href="/wiki/File_(command)" title="File (command)">file</a></li> <li><a href="/wiki/Fuser_(Unix)" title="Fuser (Unix)">fuser</a></li> <li><a href="/wiki/Ln_(Unix)" title="Ln (Unix)">ln</a></li> <li><a href="/wiki/Ls" title="Ls">ls</a></li> <li><a href="/wiki/Mkdir" title="Mkdir">mkdir</a></li> <li><a href="/wiki/Mv_(Unix)" title="Mv (Unix)">mv</a></li> <li><a href="/wiki/Pax_(command)" title="Pax (command)">pax</a></li> <li><a href="/wiki/Pwd" title="Pwd">pwd</a></li> <li><a href="/wiki/Rm_(Unix)" title="Rm (Unix)">rm</a></li> <li><a href="/wiki/Rmdir" title="Rmdir">rmdir</a></li> <li><a href="/wiki/Split_(Unix)" title="Split (Unix)">split</a></li> <li><a href="/wiki/Tee_(command)" title="Tee (command)">tee</a></li> <li><a href="/wiki/Touch_(command)" title="Touch (command)">touch</a></li> <li><a href="/wiki/Type_(Unix)" title="Type (Unix)">type</a></li> <li><a href="/wiki/Umask" title="Umask">umask</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Processes</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/At_(command)" title="At (command)">at</a></li> <li><a href="/wiki/Job_control_(Unix)#Commands" title="Job control (Unix)">bg</a></li> <li><a href="/wiki/Cron" title="Cron">crontab</a></li> <li><a href="/wiki/Job_control_(Unix)#Commands" title="Job control (Unix)">fg</a></li> <li><a href="/wiki/Kill_(command)" title="Kill (command)">kill</a></li> <li><a href="/wiki/Nice_(Unix)" title="Nice (Unix)">nice</a></li> <li><a href="/wiki/Ps_(Unix)" title="Ps (Unix)">ps</a></li> <li><a href="/wiki/Time_(Unix)" title="Time (Unix)">time</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">User environment</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Env" title="Env">env</a></li> <li><a href="/wiki/Exit_(command)" title="Exit (command)">exit</a></li> <li><a href="/wiki/Logname" title="Logname">logname</a></li> <li><a href="/wiki/Mesg" title="Mesg">mesg</a></li> <li><a href="/wiki/Talk_(software)" title="Talk (software)">talk</a></li> <li><a href="/wiki/Tput" title="Tput">tput</a></li> <li><a href="/wiki/Uname" title="Uname">uname</a></li> <li><a class="mw-selflink selflink">who</a></li> <li><a href="/wiki/Write_(Unix)" title="Write (Unix)">write</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Text processing</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/AWK" title="AWK">awk</a></li> <li><a href="/wiki/Basename" title="Basename">basename</a></li> <li><a href="/wiki/Comm" title="Comm">comm</a></li> <li><a href="/wiki/Csplit" title="Csplit">csplit</a></li> <li><a href="/wiki/Cut_(Unix)" title="Cut (Unix)">cut</a></li> <li><a href="/wiki/Diff" title="Diff">diff</a></li> <li><a href="/wiki/Dirname" title="Dirname">dirname</a></li> <li><a href="/wiki/Ed_(text_editor)" class="mw-redirect" title="Ed (text editor)">ed</a></li> <li><a href="/wiki/Ex_(text_editor)" title="Ex (text editor)">ex</a></li> <li><a href="/wiki/Fold_(Unix)" title="Fold (Unix)">fold</a></li> <li><a href="/wiki/Head_(Unix)" title="Head (Unix)">head</a></li> <li><a href="/wiki/Iconv" title="Iconv">iconv</a></li> <li><a href="/wiki/Join_(Unix)" title="Join (Unix)">join</a></li> <li><a href="/wiki/M4_(computer_language)" title="M4 (computer language)">m4</a></li> <li><a href="/wiki/More_(command)" title="More (command)">more</a></li> <li><a href="/wiki/Nl_(Unix)" title="Nl (Unix)">nl</a></li> <li><a href="/wiki/Paste_(Unix)" title="Paste (Unix)">paste</a></li> <li><a href="/wiki/Patch_(Unix)" title="Patch (Unix)">patch</a></li> <li><a href="/wiki/Printf_(Unix)" title="Printf (Unix)">printf</a></li> <li><a href="/wiki/Read_(Unix)" title="Read (Unix)">read</a></li> <li><a href="/wiki/Sed" title="Sed">sed</a></li> <li><a href="/wiki/Sort_(Unix)" title="Sort (Unix)">sort</a></li> <li><a href="/wiki/Strings_(Unix)" title="Strings (Unix)">strings</a></li> <li><a href="/wiki/Tail_(Unix)" title="Tail (Unix)">tail</a></li> <li><a href="/wiki/Tr_(Unix)" title="Tr (Unix)">tr</a></li> <li><a href="/wiki/Troff" title="Troff">troff</a></li> <li><a href="/wiki/Uniq" title="Uniq">uniq</a></li> <li><a href="/wiki/Vi_(text_editor)" title="Vi (text editor)">vi</a></li> <li><a href="/wiki/Wc_(Unix)" title="Wc (Unix)">wc</a></li> <li><a href="/wiki/Xargs" title="Xargs">xargs</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Shell_builtin" title="Shell builtin">Shell builtins</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Alias_(command)" title="Alias (command)">alias</a></li> <li><a href="/wiki/Cd_(command)" title="Cd (command)">cd</a></li> <li><a href="/wiki/Echo_(command)" title="Echo (command)">echo</a></li> <li><a href="/wiki/Test_(Unix)" title="Test (Unix)">test</a></li> <li><a href="/wiki/Environment_variable#unset_command" title="Environment variable">unset</a></li> <li><a href="/wiki/Wait_(command)" title="Wait (command)">wait</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Searching</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Find_(Unix)" title="Find (Unix)">find</a></li> <li><a href="/wiki/Grep" title="Grep">grep</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Documentation</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Man_page" title="Man page">man</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Software_development" title="Software development">Software development</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Ar_(Unix)" title="Ar (Unix)">ar</a></li> <li><a href="/wiki/Ctags" title="Ctags">ctags</a></li> <li><a href="/wiki/Lex_(software)" title="Lex (software)">lex</a></li> <li><a href="/wiki/Make_(software)" title="Make (software)">make</a></li> <li><a href="/wiki/Nm_(Unix)" title="Nm (Unix)">nm</a></li> <li><a href="/wiki/Strip_(Unix)" title="Strip (Unix)">strip</a></li> <li><a href="/wiki/Yacc" title="Yacc">yacc</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Miscellaneous</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Bc_(programming_language)" title="Bc (programming language)">bc</a></li> <li><a href="/wiki/Cal_(command)" title="Cal (command)">cal</a></li> <li><a href="/wiki/Expr" title="Expr">expr</a></li> <li><a href="/wiki/System_V_printing_system" title="System V printing system">lp</a></li> <li><a href="/wiki/Od_(Unix)" title="Od (Unix)">od</a></li> <li><a href="/wiki/Sleep_(command)" title="Sleep (command)">sleep</a></li> <li><a href="/wiki/True_and_false_(commands)" title="True and false (commands)">true and false</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow hlist" colspan="2"><div> <ul><li><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/23px-Symbol_category_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/31px-Symbol_category_class.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <b>Categories</b> <ul><li><a href="/wiki/Category:Standard_Unix_programs" title="Category:Standard Unix programs">Standard Unix programs</a></li> <li><a href="/wiki/Category:Unix_SUS2008_utilities" title="Category:Unix SUS2008 utilities">Unix SUS2008 utilities</a></li></ul></li> <li><span class="noviewer" typeof="mw:File"><span title="List-Class article"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/d/db/Symbol_list_class.svg/16px-Symbol_list_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/d/db/Symbol_list_class.svg/23px-Symbol_list_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/d/db/Symbol_list_class.svg/31px-Symbol_list_class.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <b><a href="/wiki/List_of_POSIX_commands" title="List of POSIX commands">List</a></b></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox" aria-labelledby="Plan_9_command-line_interface_programs_and_shell_builtins" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Plan_9_commands" title="Template:Plan 9 commands"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Plan_9_commands" title="Template talk:Plan 9 commands"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Plan_9_commands" title="Special:EditPage/Template:Plan 9 commands"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Plan_9_command-line_interface_programs_and_shell_builtins" style="font-size:114%;margin:0 4em"><a href="/wiki/Plan_9_from_Bell_Labs" title="Plan 9 from Bell Labs">Plan 9</a> <a href="/wiki/Command-line_interface" title="Command-line interface">command-line interface</a> programs and <a href="/wiki/Shell_builtin" title="Shell builtin">shell builtins</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">File system</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Chmod" title="Chmod">chmod</a></li> <li><a href="/wiki/Chgrp" title="Chgrp">chgrp</a></li> <li><a href="/wiki/Cmp_(Unix)" title="Cmp (Unix)">cmp</a></li> <li><a href="/wiki/Cp_(Unix)" title="Cp (Unix)">cp</a></li> <li><a href="/wiki/Dd_(Unix)" title="Dd (Unix)">dd</a></li> <li><a href="/wiki/Du_(Unix)" title="Du (Unix)">du</a></li> <li><a href="/wiki/File_(command)" title="File (command)">file</a></li> <li><a href="/wiki/Gzip" title="Gzip">gzip</a></li> <li><a href="/wiki/Ls" title="Ls">ls</a></li> <li><a href="/wiki/Mkdir" title="Mkdir">mkdir</a></li> <li><a href="/wiki/Pwd" title="Pwd">pwd</a></li> <li><a href="/wiki/Rm_(Unix)" title="Rm (Unix)">rm</a></li> <li><a href="/wiki/Split_(Unix)" title="Split (Unix)">split</a></li> <li><a href="/wiki/Tee_(command)" title="Tee (command)">tee</a></li> <li><a href="/wiki/Touch_(command)" title="Touch (command)">touch</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Processes</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Kill_(command)" title="Kill (command)">kill</a></li> <li><a href="/wiki/Ps_(Unix)" title="Ps (Unix)">ps</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">User environment</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Passwd" title="Passwd">passwd</a></li> <li><a class="mw-selflink selflink">who</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Text processing</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/AWK" title="AWK">awk</a></li> <li><a href="/wiki/Basename" title="Basename">basename</a></li> <li><a href="/wiki/Comm" title="Comm">comm</a></li> <li><a href="/wiki/Diff" title="Diff">diff</a></li> <li><a href="/wiki/Ed_(text_editor)" class="mw-redirect" title="Ed (text editor)">ed</a></li> <li><a href="/wiki/Eqn_(software)" title="Eqn (software)">eqn</a></li> <li><a href="/wiki/Join_(Unix)" title="Join (Unix)">join</a></li> <li><a href="/wiki/Sed" title="Sed">sed</a></li> <li><a href="/wiki/Sort_(Unix)" title="Sort (Unix)">sort</a></li> <li><a href="/wiki/Spell_(Unix)" title="Spell (Unix)">spell</a></li> <li><a href="/wiki/Strings_(Unix)" title="Strings (Unix)">strings</a></li> <li><a href="/wiki/Tail_(Unix)" title="Tail (Unix)">tail</a></li> <li><a href="/wiki/Tr_(Unix)" title="Tr (Unix)">tr</a></li> <li><a href="/wiki/Troff" title="Troff">troff</a></li> <li><a href="/wiki/Uniq" title="Uniq">uniq</a></li> <li><a href="/wiki/Wc_(Unix)" title="Wc (Unix)">wc</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Shell_builtin" title="Shell builtin">Shell builtins</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Echo_(command)" title="Echo (command)">echo</a></li> <li><a href="/wiki/Test_(Unix)" title="Test (Unix)">test</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Network_utility" title="Network utility">Networking</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Ipconfig" title="Ipconfig">ip/ipconfig</a></li> <li><a href="/wiki/Ping_(networking_utility)" title="Ping (networking utility)">ip/ping</a></li> <li><a href="/wiki/Netstat" title="Netstat">netstat</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Searching</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Grep" title="Grep">grep</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Software_development" title="Software development">Software development</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Ar_(Unix)" title="Ar (Unix)">ar</a></li> <li><a href="/wiki/Hoc_(programming_language)" title="Hoc (programming language)">hoc</a></li> <li><a href="/wiki/Lex_(software)" title="Lex (software)">lex</a></li> <li><a href="/wiki/Nm_(Unix)" title="Nm (Unix)">nm</a></li> <li><a href="/wiki/Strip_(Unix)" title="Strip (Unix)">strip</a></li> <li><a href="/wiki/Yacc" title="Yacc">yacc</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Miscellaneous</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Bc_(programming_language)" title="Bc (programming language)">bc</a></li> <li><a href="/wiki/Cal_(command)" title="Cal (command)">cal</a></li> <li><a href="/wiki/Fortune_(Unix)" title="Fortune (Unix)">fortune</a></li> <li><a href="/wiki/Sleep_(command)" title="Sleep (command)">sleep</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow hlist" colspan="2"><div> <ul><li><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/23px-Symbol_category_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/31px-Symbol_category_class.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <a href="/wiki/Category:Plan_9_commands" title="Category:Plan 9 commands">Category</a></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox" aria-labelledby="GNU_Core_Utilities_command-line_interface_programs" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Core_Utilities_commands" title="Template:Core Utilities commands"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Core_Utilities_commands" title="Template talk:Core Utilities commands"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Core_Utilities_commands" title="Special:EditPage/Template:Core Utilities commands"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="GNU_Core_Utilities_command-line_interface_programs" style="font-size:114%;margin:0 4em"><a href="/wiki/GNU_Core_Utilities" title="GNU Core Utilities">GNU Core Utilities</a> <a href="/wiki/Command-line_interface" title="Command-line interface">command-line interface</a> programs</div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">File system</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/w/index.php?title=Chcon&action=edit&redlink=1" class="new" title="Chcon (page does not exist)">chcon</a></li> <li><a href="/wiki/Chmod" title="Chmod">chmod</a></li> <li><a href="/wiki/Chown" title="Chown">chown</a></li> <li><a href="/wiki/Chgrp" title="Chgrp">chgrp</a></li> <li><a href="/wiki/Cksum" title="Cksum">cksum</a></li> <li><a href="/wiki/Cp_(Unix)" title="Cp (Unix)">cp</a></li> <li><a href="/wiki/Dd_(Unix)" title="Dd (Unix)">dd</a></li> <li><a href="/wiki/Df_(Unix)" title="Df (Unix)">df</a></li> <li><a href="/wiki/Ls" title="Ls">dir</a></li> <li><a href="/w/index.php?title=Dircolors_(Unix)&action=edit&redlink=1" class="new" title="Dircolors (Unix) (page does not exist)">dircolors</a></li> <li><a href="/wiki/Install_(Unix)" title="Install (Unix)">install</a></li> <li><a href="/wiki/Ln_(Unix)" title="Ln (Unix)">ln</a></li> <li><a href="/wiki/Ls" title="Ls">ls</a></li> <li><a href="/wiki/Mkdir" title="Mkdir">mkdir</a></li> <li><a href="/wiki/Mkfifo" class="mw-redirect" title="Mkfifo">mkfifo</a></li> <li><a href="/wiki/Mknod" class="mw-redirect" title="Mknod">mknod</a></li> <li><a href="/wiki/Mktemp" title="Mktemp">mktemp</a></li> <li><a href="/wiki/Mv_(Unix)" title="Mv (Unix)">mv</a></li> <li><a href="/w/index.php?title=Realpath&action=edit&redlink=1" class="new" title="Realpath (page does not exist)">realpath</a></li> <li><a href="/wiki/Rm_(Unix)" title="Rm (Unix)">rm</a></li> <li><a href="/wiki/Rmdir" title="Rmdir">rmdir</a></li> <li><a href="/wiki/Shred_(Unix)" title="Shred (Unix)">shred</a></li> <li><a href="/wiki/Sync_(Unix)" title="Sync (Unix)">sync</a></li> <li><a href="/wiki/Touch_(command)" title="Touch (command)">touch</a></li> <li><a href="/wiki/Truncate" class="mw-redirect" title="Truncate">truncate</a></li> <li><a href="/wiki/Ls" title="Ls">vdir</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Text utilities</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/w/index.php?title=B2sum&action=edit&redlink=1" class="new" title="B2sum (page does not exist)">b2sum</a></li> <li><a href="/wiki/Base32" title="Base32">base32</a></li> <li><a href="/wiki/Base64" title="Base64">base64</a></li> <li><a href="/wiki/Cat_(Unix)" title="Cat (Unix)">cat</a></li> <li><a href="/wiki/Cksum" title="Cksum">cksum</a></li> <li><a href="/wiki/Comm" title="Comm">comm</a></li> <li><a href="/wiki/Csplit" title="Csplit">csplit</a></li> <li><a href="/wiki/Cut_(Unix)" title="Cut (Unix)">cut</a></li> <li><a href="/wiki/Expand_(Unix)" title="Expand (Unix)">expand</a></li> <li><a href="/wiki/Fmt_(Unix)" title="Fmt (Unix)">fmt</a></li> <li><a href="/wiki/Fold_(Unix)" title="Fold (Unix)">fold</a></li> <li><a href="/wiki/Head_(Unix)" title="Head (Unix)">head</a></li> <li><a href="/wiki/Join_(Unix)" title="Join (Unix)">join</a></li> <li><a href="/wiki/Md5sum" title="Md5sum">md5sum</a></li> <li><a href="/wiki/Nl_(Unix)" title="Nl (Unix)">nl</a></li> <li><a href="/w/index.php?title=Numfmt&action=edit&redlink=1" class="new" title="Numfmt (page does not exist)">numfmt</a></li> <li><a href="/wiki/Od_(Unix)" title="Od (Unix)">od</a></li> <li><a href="/wiki/Paste_(Unix)" title="Paste (Unix)">paste</a></li> <li><a href="/wiki/Ptx_(Unix)" title="Ptx (Unix)">ptx</a></li> <li><a href="/wiki/Pr_(Unix)" title="Pr (Unix)">pr</a></li> <li><a href="/wiki/Sha1sum" title="Sha1sum">sha1sum</a></li> <li><a href="/wiki/Shuf" title="Shuf">shuf</a></li> <li><a href="/wiki/Sort_(Unix)" title="Sort (Unix)">sort</a></li> <li><a href="/wiki/Split_(Unix)" title="Split (Unix)">split</a></li> <li><a href="/wiki/Sum_(Unix)" title="Sum (Unix)">sum</a></li> <li>tac</li> <li><a href="/wiki/Tail_(Unix)" title="Tail (Unix)">tail</a></li> <li><a href="/wiki/Tr_(Unix)" title="Tr (Unix)">tr</a></li> <li><a href="/wiki/Tsort" title="Tsort">tsort</a></li> <li><a href="/wiki/Unexpand" title="Unexpand">unexpand</a></li> <li><a href="/wiki/Uniq" title="Uniq">uniq</a></li> <li><a href="/wiki/Wc_(Unix)" title="Wc (Unix)">wc</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Shell utilities</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Uname" title="Uname">arch</a></li> <li><a href="/wiki/Basename" title="Basename">basename</a></li> <li><a href="/wiki/Chroot" title="Chroot">chroot</a></li> <li><a href="/wiki/Unix_time#Command_line" title="Unix time">date</a></li> <li><a href="/wiki/Dirname" title="Dirname">dirname</a></li> <li><a href="/wiki/Du_(Unix)" title="Du (Unix)">du</a></li> <li><a href="/wiki/Echo_(command)" title="Echo (command)">echo</a></li> <li><a href="/wiki/Env" title="Env">env</a></li> <li><a href="/wiki/Expr" title="Expr">expr</a></li> <li><a href="/wiki/Factor_(Unix)" title="Factor (Unix)">factor</a></li> <li><a href="/wiki/True_and_false_(commands)" title="True and false (commands)">false</a></li> <li><a href="/wiki/Groups_(Unix)" class="mw-redirect" title="Groups (Unix)">groups</a></li> <li><a href="/w/index.php?title=Hostid_(Unix)&action=edit&redlink=1" class="new" title="Hostid (Unix) (page does not exist)">hostid</a></li> <li><a href="/wiki/Id_(Unix)" class="mw-redirect" title="Id (Unix)">id</a></li> <li><a href="/wiki/Link_(Unix)" title="Link (Unix)">link</a></li> <li><a href="/wiki/Logname" title="Logname">logname</a></li> <li><a href="/wiki/Nice_(Unix)" title="Nice (Unix)">nice</a></li> <li><a href="/wiki/Nohup" title="Nohup">nohup</a></li> <li><a href="/w/index.php?title=Nproc&action=edit&redlink=1" class="new" title="Nproc (page does not exist)">nproc</a></li> <li><a href="/w/index.php?title=Pathchk_(Unix)&action=edit&redlink=1" class="new" title="Pathchk (Unix) (page does not exist)">pathchk</a></li> <li><a href="/w/index.php?title=Pinky_(Unix)&action=edit&redlink=1" class="new" title="Pinky (Unix) (page does not exist)">pinky</a></li> <li><a href="/wiki/Printenv" class="mw-redirect" title="Printenv">printenv</a></li> <li><a href="/wiki/Printf" title="Printf">printf</a></li> <li><a href="/wiki/Pwd" title="Pwd">pwd</a></li> <li><a href="/wiki/Readlink" class="mw-redirect" title="Readlink">readlink</a></li> <li><a href="/w/index.php?title=Runcon&action=edit&redlink=1" class="new" title="Runcon (page does not exist)">runcon</a></li> <li><a href="/wiki/Seq_(Unix)" title="Seq (Unix)">seq</a></li> <li><a href="/wiki/Sleep_(command)" title="Sleep (command)">sleep</a></li> <li>stat</li> <li><a href="/w/index.php?title=Stdbuf&action=edit&redlink=1" class="new" title="Stdbuf (page does not exist)">stdbuf</a></li> <li><a href="/wiki/Stty_(Unix)" class="mw-redirect" title="Stty (Unix)">stty</a></li> <li><a href="/wiki/Tee_(command)" title="Tee (command)">tee</a></li> <li><a href="/wiki/Test_(Unix)" title="Test (Unix)">test</a></li> <li><a href="/wiki/Timeout_(computing)" title="Timeout (computing)">timeout</a></li> <li><a href="/wiki/True_and_false_(commands)" title="True and false (commands)">true</a></li> <li><a href="/wiki/Tty_(Unix)" title="Tty (Unix)">tty</a></li> <li><a href="/wiki/Uname" title="Uname">uname</a></li> <li><a href="/wiki/Unlink_(Unix)" title="Unlink (Unix)">unlink</a></li> <li><a href="/wiki/Uptime#coreutils" title="Uptime">uptime</a></li> <li><a href="/wiki/Users_(Unix)" class="mw-redirect" title="Users (Unix)">users</a></li> <li><a class="mw-selflink selflink">who</a></li> <li><a href="/wiki/Whoami" title="Whoami">whoami</a></li> <li><a href="/wiki/Yes_(Unix)" title="Yes (Unix)">yes</a></li></ul> </div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Who_(Unix)&oldid=1148635790">https://en.wikipedia.org/w/index.php?title=Who_(Unix)&oldid=1148635790</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Categories</a>: <ul><li><a href="/wiki/Category:Multics_commands" title="Category:Multics commands">Multics commands</a></li><li><a href="/wiki/Category:Unix_user_management_and_support-related_utilities" title="Category:Unix user management and support-related utilities">Unix user management and support-related utilities</a></li><li><a href="/wiki/Category:Standard_Unix_programs" title="Category:Standard Unix programs">Standard Unix programs</a></li><li><a href="/wiki/Category:Unix_SUS2008_utilities" title="Category:Unix SUS2008 utilities">Unix SUS2008 utilities</a></li><li><a href="/wiki/Category:Plan_9_commands" 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