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<h1 id="firstHeading" class="firstHeading mw-first-heading">
<span id="openzim-page-title" class="mw-page-title-main">command (Unix)</span>
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</style><table class="infobox vevent"><tbody><tr><th colspan="2" class="infobox-above summary">command</th></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="Operating_system" title="Operating system">Operating system</a></th><td class="infobox-data"><a href="Unix" title="Unix">Unix</a> and <a href="Unix-like" title="Unix-like">Unix-like</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="Software_categories#Categorization_approaches" title="Software categories">Type</a></th><td class="infobox-data"><a href="Command_(computing)" title="Command (computing)">Command</a></td></tr></tbody></table>
<p><code><b>command</b></code> is a <a href="Unix_shell" title="Unix shell">shell</a> <a href="Command_(computing)" title="Command (computing)">command</a> for executing a command without invoking a <a href="Function_(computing)" class="mw-redirect" title="Function (computing)">function</a> or <a href="Alias_(command)" title="Alias (command)">alias</a> that has the same name.<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> The <a href="Command_line" class="mw-redirect" title="Command line">command line</a> arguments consist of an inner command line to executed. If the first argument is the name of a function or alias as well as the name of a command, then normally the function or alias takes precedence, but when passed as an argument to <code class="mw-highlight mw-highlight-lang-text mw-content-ltr" style="" dir="ltr">command</code> the inner command is invoked instead of the function.<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>
</p><p>The command is available on <a href="Unix" title="Unix">Unix</a> and <a href="Unix-like" title="Unix-like">Unix-like</a> <a href="Operating_system" title="Operating system">operating systems</a>. It is specified in the <a href="POSIX" title="POSIX">POSIX</a> standard and is often implemented in <a href="Unix_shell" title="Unix shell">Unix shells</a> as a <a href="Shell_builtin" title="Shell builtin">shell builtin</a> function or alias.
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<div class="mw-heading mw-heading2"><h2 id="Examples">Examples</h2></div>
<p>In the following, the <code>ls</code> command is run directly instead of invoking a function or alias with the same name.
</p>
<div class="mw-highlight mw-highlight-lang-console mw-content-ltr" dir="ltr"><pre><span class="gp">$ </span><span class="nb">command</span><span class="w"> </span>ls
</pre></div>
<div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2></div>
<ul><li><a href="List_of_POSIX_commands" title="List of POSIX commands">List of POSIX commands</a></li></ul>
<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>
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<li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">
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</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://manned.org/man/command">"command - manned.org"</a>. <i>POSIX Programmer's Manual</i><span class="reference-accessdate">. Retrieved <span class="nowrap">13 February</span> 2025</span>.</cite></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"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://man7.org/linux/man-pages/man1/command.1p.html">"command(1p)"</a>. <i>Linux manual page</i><span class="reference-accessdate">. Retrieved <span class="nowrap">13 February</span> 2025</span>.</cite></span>
</li>
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<div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2></div>
<ul><li><span class="neverexpand"><code><a rel="nofollow" class="external text" href="https://pubs.opengroup.org/onlinepubs/9799919799/utilities/command.html">command</a></code></span> – Shell and Utilities Reference, <a href="Single_Unix_Specification" class="mw-redirect" title="Single Unix Specification">The Single UNIX Specification</a>, Version 5 from <a href="The_Open_Group" title="The Open Group">The Open Group</a></li></ul>
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</style><div id="Unix_command-line_interface_programs_and_shell_builtins541" style="font-size:114%;margin:0 4em"><a href="Unix" title="Unix">Unix</a> <a href="Command-line_interface" title="Command-line interface">command-line interface</a> programs and <a href="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="Cat_(Unix)" title="Cat (Unix)">cat</a></li>
<li><a href="Chattr" title="Chattr">chattr</a></li>
<li><a href="Chmod" title="Chmod">chmod</a></li>
<li><a href="Chown" title="Chown">chown</a></li>
<li><a href="Chgrp" title="Chgrp">chgrp</a></li>
<li><a href="Cksum" title="Cksum">cksum</a></li>
<li><a href="Cmp_(Unix)" title="Cmp (Unix)">cmp</a></li>
<li><a href="Cp_(Unix)" title="Cp (Unix)">cp</a></li>
<li><a href="Dd_(Unix)" title="Dd (Unix)">dd</a></li>
<li><a href="Du_(Unix)" title="Du (Unix)">du</a></li>
<li><a href="Df_(Unix)" title="Df (Unix)">df</a></li>
<li><a href="File_(command)" title="File (command)">file</a></li>
<li><a href="Fuser_(Unix)" title="Fuser (Unix)">fuser</a></li>
<li><a href="Ln_(Unix)" title="Ln (Unix)">ln</a></li>
<li><a href="Ls" title="Ls">ls</a></li>
<li><a href="Mkdir" title="Mkdir">mkdir</a></li>
<li><a href="Mv_(Unix)" title="Mv (Unix)">mv</a></li>
<li><a href="Pax_(command)" title="Pax (command)">pax</a></li>
<li><a href="Pwd" title="Pwd">pwd</a></li>
<li><a href="Rm_(Unix)" title="Rm (Unix)">rm</a></li>
<li><a href="Rmdir" title="Rmdir">rmdir</a></li>
<li><a href="Split_(Unix)" title="Split (Unix)">split</a></li>
<li><a href="Tee_(command)" title="Tee (command)">tee</a></li>
<li><a href="Touch_(command)" title="Touch (command)">touch</a></li>
<li><a href="Type_(Unix)" title="Type (Unix)">type</a></li>
<li><a href="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="At_(command)" title="At (command)">at</a></li>
<li><a href="Job_control_(Unix)#Commands" title="Job control (Unix)">bg</a></li>
<li><a href="Cron" title="Cron">crontab</a></li>
<li><a href="Job_control_(Unix)#Commands" title="Job control (Unix)">fg</a></li>
<li><a href="Kill_(command)" title="Kill (command)">kill</a></li>
<li><a href="Nice_(Unix)" title="Nice (Unix)">nice</a></li>
<li><a href="Ps_(Unix)" title="Ps (Unix)">ps</a></li>
<li><a href="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="Env" title="Env">env</a></li>
<li><a href="Exit_(command)" title="Exit (command)">exit</a></li>
<li><a href="Logname" title="Logname">logname</a></li>
<li><a href="Mesg" title="Mesg">mesg</a></li>
<li><a href="Talk_(software)" title="Talk (software)">talk</a></li>
<li><a href="Tput" title="Tput">tput</a></li>
<li><a href="Uname" title="Uname">uname</a></li>
<li><a href="Who_(Unix)" title="Who (Unix)">who</a></li>
<li><a href="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="AWK" title="AWK">awk</a></li>
<li><a href="Basename" title="Basename">basename</a></li>
<li><a href="Comm" title="Comm">comm</a></li>
<li><a href="Csplit" title="Csplit">csplit</a></li>
<li><a href="Cut_(Unix)" title="Cut (Unix)">cut</a></li>
<li><a href="Diff" title="Diff">diff</a></li>
<li><a href="Dirname" title="Dirname">dirname</a></li>
<li><a href="Ed_(text_editor)" class="mw-redirect" title="Ed (text editor)">ed</a></li>
<li><a href="Ex_(text_editor)" title="Ex (text editor)">ex</a></li>
<li><a href="Fold_(Unix)" title="Fold (Unix)">fold</a></li>
<li><a href="Head_(Unix)" title="Head (Unix)">head</a></li>
<li><a href="Iconv" title="Iconv">iconv</a></li>
<li><a href="Join_(Unix)" title="Join (Unix)">join</a></li>
<li><a href="M4_(computer_language)" title="M4 (computer language)">m4</a></li>
<li><a href="More_(command)" title="More (command)">more</a></li>
<li><a href="Nl_(Unix)" title="Nl (Unix)">nl</a></li>
<li><a href="Paste_(Unix)" title="Paste (Unix)">paste</a></li>
<li><a href="Patch_(Unix)" title="Patch (Unix)">patch</a></li>
<li><a href="Printf_(Unix)" title="Printf (Unix)">printf</a></li>
<li><a href="Read_(Unix)" title="Read (Unix)">read</a></li>
<li><a href="Sed" title="Sed">sed</a></li>
<li><a href="Sort_(Unix)" title="Sort (Unix)">sort</a></li>
<li><a href="Strings_(Unix)" title="Strings (Unix)">strings</a></li>
<li><a href="Tail_(Unix)" title="Tail (Unix)">tail</a></li>
<li><a href="Tr_(Unix)" title="Tr (Unix)">tr</a></li>
<li><a href="Troff" title="Troff">troff</a></li>
<li><a href="Uniq" title="Uniq">uniq</a></li>
<li><a href="Vi_(text_editor)" title="Vi (text editor)">vi</a></li>
<li><a href="Wc_(Unix)" title="Wc (Unix)">wc</a></li>
<li><a href="Xargs" title="Xargs">xargs</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="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="Alias_(command)" title="Alias (command)">alias</a></li>
<li><a href="Cd_(command)" title="Cd (command)">cd</a></li>
<li><a href="Echo_(command)" title="Echo (command)">echo</a></li>
<li><a href="Test_(Unix)" title="Test (Unix)">test</a></li>
<li><a href="Environment_variable#unset_command" title="Environment variable">unset</a></li>
<li><a href="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="Find_(Unix)" title="Find (Unix)">find</a></li>
<li><a href="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="Man_page" title="Man page">man</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="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="Ar_(Unix)" title="Ar (Unix)">ar</a></li>
<li><a href="Ctags" title="Ctags">ctags</a></li>
<li><a href="Lex_(software)" title="Lex (software)">lex</a></li>
<li><a href="Make_(software)" title="Make (software)">make</a></li>
<li><a href="Nm_(Unix)" title="Nm (Unix)">nm</a></li>
<li><a href="Strip_(Unix)" title="Strip (Unix)">strip</a></li>
<li><a href="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="Bc_(programming_language)" title="Bc (programming language)">bc</a></li>
<li><a href="Cal_(command)" title="Cal (command)">cal</a></li>
<li><a href="Expr" title="Expr">expr</a></li>
<li><a href="System_V_printing_system" title="System V printing system">lp</a></li>
<li><a href="Od_(Unix)" title="Od (Unix)">od</a></li>
<li><a href="Sleep_(command)" title="Sleep (command)">sleep</a></li>
<li><a href="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"></span></span> <b>Categories</b>
<ul><li>Standard Unix programs</li>
<li>Unix SUS2008 utilities</li></ul></li>
<li><span class="noviewer" typeof="mw:File"><span title="List-Class article"></span></span> <b><a href="List_of_POSIX_commands" title="List of POSIX commands">List</a></b></li></ul>
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This article is issued from <a class="external text" title="Last edited on 2025-08-05" href="https://en.wikipedia.org/wiki/?title=Command_(Unix)&oldid=1304275327">Wikipedia</a>. The text is available under <a class="external text" href="https://creativecommons.org/licenses/by-sa/4.0/deed.en">Creative Commons Attribution-Share Alike 4.0</a> unless otherwise noted. Additional terms may apply for the media files.
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