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Linux in a Nutshell, 6th Edition by Robert Love, Stephen Figgins, Ellen Siever, Arnold Robbins

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Name

chgrp

Synopsis

chgrp [options] newgroup files

Change the group of one or more files to newgroup. newgroup is either a group ID number or a group name located in /etc/group. Only the owner of a file or a privileged user may change the group.

Options

-c, --changes

Print information about files that are changed.

--dereference

Change the group of the file pointed to by a symbolic link, not the group of the symbolic link. This is the default behavior.

-f, --silent, --quiet

Do not print error messages about files that cannot be changed.

-h, --no-dereference

Change the group of the symbolic link.

-H

Used with -R. If a command-line argument is a symbolic link to a directory, traverse the directory.

--help

Print help message and then exit.

-L

Used with -R. Traverse every symbolic link that points to a directory.

--no-preserve-root

Do not treat / as special. This is the default behavior.

-P

Used with -R. Do not traverse any symbolic links. This is the default behavior.

--preserve-root

Do not operate recursively on /.

-R, --recursive

Traverse subdirectories recursively, applying changes.

--reference=filename

Change the group to that associated with filename. In this case, newgroup is not specified.

-v, --verbose

Verbosely describe ownership changes.

--version

Print version information and then exit.

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