1.\" Copyright (c) 1983, 1990, 1993, 1994 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" This code is derived from software contributed to Berkeley by 5.\" the Institute of Electrical and Electronics Engineers, Inc. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 4. Neither the name of the University nor the names of its contributors 16.\" may be used to endorse or promote products derived from this software 17.\" without specific prior written permission. 18.\" 19.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29.\" SUCH DAMAGE. 30.\" 31.\" @(#)chgrp.1 8.3 (Berkeley) 3/31/94 32.\" $FreeBSD: head/usr.sbin/chown/chgrp.1 282208 2015-04-29 00:49:00Z smh $ 33.\" 34.Dd May 12, 2016 35.Dt CHGRP 1 36.Os 37.Sh NAME 38.Nm chgrp 39.Nd change group 40.Sh SYNOPSIS 41.Nm 42.Op Fl fhvx 43.Oo 44.Fl R 45.Op Fl H | Fl L | Fl P 46.Oc 47.Ar group 48.Ar 49.Sh DESCRIPTION 50The 51.Nm 52utility sets the group ID of the file named by each 53.Ar file 54operand to the 55.Ar group 56ID specified by the group operand. 57.Pp 58The following options are available: 59.Bl -tag -width indent 60.It Fl H 61If the 62.Fl R 63option is specified, symbolic links on the command line are followed 64and hence unaffected by the command. 65(Symbolic links encountered during traversal are not followed.) 66.It Fl L 67If the 68.Fl R 69option is specified, all symbolic links are followed. 70.It Fl P 71If the 72.Fl R 73option is specified, no symbolic links are followed. 74This is the default. 75.It Fl R 76Change the group ID of the file hierarchies rooted in the files, 77instead of just the files themselves. 78Beware of unintentionally matching the 79.Dq Pa ".." 80hard link to the parent directory when using wildcards like 81.Dq Li ".*" . 82.It Fl f 83The force option ignores errors, except for usage errors and does not 84query about strange modes (unless the user does not have proper permissions). 85.It Fl h 86If the file is a symbolic link, the group ID of the link itself is changed 87rather than the file that is pointed to. 88.It Fl v 89Cause 90.Nm 91to be verbose, showing files as the group is modified. 92If the 93.Fl v 94flag is specified more than once, 95.Nm 96will print the filename, followed by the old and new numeric group ID. 97.It Fl x 98File system mount points are not traversed. 99.El 100.Pp 101The 102.Fl H , 103.Fl L 104and 105.Fl P 106options are ignored unless the 107.Fl R 108option is specified. 109In addition, these options override each other and the 110command's actions are determined by the last one specified. 111.Pp 112The 113.Ar group 114operand can be either a group name from the group database, 115or a numeric group ID. 116If a group name is also a numeric group ID, the operand is used as a 117group name. 118.Pp 119The user invoking 120.Nm 121must belong to the specified group and be the owner of the file, 122or be the super-user. 123.Sh FILES 124.Bl -tag -width /etc/group -compact 125.It Pa /etc/group 126group ID file 127.El 128.Sh EXIT STATUS 129.Ex -std 130.Sh COMPATIBILITY 131In previous versions of this system, symbolic links did not have groups. 132.Pp 133The 134.Fl v 135and 136.Fl x 137options are non-standard and their use in scripts is not recommended. 138.Sh SEE ALSO 139.Xr chown 2 , 140.Xr fts 3 , 141.Xr group 5 , 142.Xr passwd 5 , 143.Xr symlink 7 , 144.Xr chown 8 145.Sh STANDARDS 146The 147.Nm 148utility is expected to be 149.St -p1003.2 150compatible. 151