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chgrp
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<h2 id="history">History</h2> <p>The chgrp command was originally developed as part of the <a href="/facts/Unix/0pNL2seI">Unix</a> operating system by <a href="/facts/AT%2526T_Bell_Laboratories/fKP5Gk0H">AT&T Bell Laboratories</a>. It is available in most <a href="/facts/Unix-like/YAKrAxzd">Unix-like</a> systems, <a href="/facts/Plan_9_from_Bell_Labs/pQjPlS7w">Plan 9</a>, <a href="/facts/Inferno_(operating_system)/baKPoWRU">Inferno</a> and <a href="/facts/IBM_i/lsIRAUvn">IBM i</a>.<a class="footnote-ref" id="fnref:1" href="#fn:1"><sup>1</sup></a> </p><p>The version of chgrp bundled in <a href="/facts/GNU/HlAKKBdt">GNU</a> <a href="/facts/Coreutils/Q9cop5U5">coreutils</a> was written by David MacKenzie.<a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a> </p> <h2 id="use">Use</h2> <p>Generally, the syntax can be described as: </p> chgrp [<i>options</i>] <i>group</i> <i>files</i> <ul><li><i>group</i> specifies the group with which the files should be associated; may be either a symbolic name or an <a href="/facts/Group_identifier_(Unix)/23lndCN4">identifier</a></li> <li><i>files</i> specifies one or more files, which may be the result of a <a href="/facts/Glob_(programming)/IIPcqW8o">glob</a> expression like *.conf</li></ul> <p>Options: </p> <ul><li>-R Recurse through directories</li> <li>-v Verbose output: log the name of each file changed</li> <li>-f Force or forge ahead even if an error occurs</li></ul> <h2 id="examples">Examples</h2> <p>The following demonstrates changing the group of files matching *.conf to <i>staff</i> – provided the user owns the files (is <i>gbeeker</i>) and is a member of <i>staff</i>. The change will allow members of the group <i>staff</i> to modify the files since the group-class permissions (read/write) will apply; not the others-class permissions (read only). </p> $ ls -l *.conf -rw-rw-r-- 1 gbeeker wheel 3545 Nov 04 2011 prog.conf -rw-rw-r-- 1 gbeeker wheel 3545 Nov 04 2011 prox.conf $ chgrp staff *.conf $ ls -l *.conf -rw-rw-r-- 1 gbeeker staff 3545 Nov 04 2011 prog.conf -rw-rw-r-- 1 gbeeker staff 3545 Nov 04 2011 prox.conf <h2 id="see-also">See also</h2> <ul><li><a href="/facts/Chmod/aGRdWvvk">chmod</a> – Shell command for changing access permissions of a file</li> <li><a href="/facts/Chown/JPm7Xv6u">chown</a> – Shell command for changing the owner of a file</li> <li><a href="/facts/Group_identifier_(Unix)/23lndCN4">Group identifier (Unix)</a> – Unix/POSIX system account group number; numeric value used to represent a specific groupPages displaying short descriptions of redirect targets</li> <li><a href="/facts/List_of_POSIX_commands/EEuIsUx9">List of POSIX commands</a></li></ul> <h2 id="external-links">External links</h2> The Wikibook <i>Guide to Unix</i> has a page on the topic of: <i>Commands</i> <ul><li><a href="https://pubs.opengroup.org/onlinepubs/9799919799/utilities/chgrp.html">chgrp</a>: change the file group ownership – Shell and Utilities Reference, <a href="/facts/Single_Unix_Specification/w1ba5bDt">The Single UNIX Specification</a>, Version 4 from <a href="/facts/The_Open_Group/uRoDdEae">The Open Group</a></li> <li><a href="https://9p.io/magic/man2html/1/chgrp">chgrp(1)</a> – <a href="/facts/Plan_9_from_Bell_Labs/pQjPlS7w">Plan 9</a> Programmer's Manual, Volume 1</li> <li><a href="http://man.cat-v.org/inferno/1/chgrp">chgrp(1)</a> – <a href="/facts/Inferno_(operating_system)/baKPoWRU">Inferno</a> General commands <a href="/facts/Man_page/S2yYjy0J">Manual</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>IBM. "IBM System i Version 7.2 Programming Qshell" (PDF). IBM. Archived (PDF) from the original on 2020-09-18. Retrieved 2020-09-05. <a href="/wiki/IBM" target="_blank">/wiki/IBM</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>chgrp(1) – Linux User Manual – User Commands <a href="https://manned.org/chgrp.1" target="_blank">https://manned.org/chgrp.1</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> </ol>