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chgrp
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<p>chgrp, short for change group, is a <a href="/facts/Shell_(computing)/Sa67elS7">shell</a> <a href="/facts/Command_(computing)/zUrvQbFy">command</a> for changing the <a href="/facts/Group_(computing)/9PY9xUaE">group</a> associated with a <a href="/facts/Unix/0pNL2seI">Unix</a>-based <a href="/facts/File_system/FdPm90uc">file system</a> <a href="/facts/Computer_file/FjFH3Ufm">file</a> – including special files such as <a href="/facts/Directory_(computing)/VLtLcEXY">directories</a>. Changing the group of a file is restricted to a super-user (such as via sudo) or to the file's owning user if the user is in the specified group. </p><p>A file has access <a href="/facts/File-system_permissions/DHq5SwI4">permissions</a> for the owning user, a group and for others. Changing the group for a file changes access to it based on users' group memberships. </p>