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Manual Reference Pages  - CHOWN (1)

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chown - change file owner and group

CONTENTS

Synopsis
Description
Environment
Notes

chown [options] user[:group] file...

POSIX options: [-R] [--]

GNU options (shortest form): [-cfhvR] [--dereference] [--reference=rfile] [--help] [--version] [--]

chown changes the user and/or group ownership of each given file as specified by the first non-option argument as follows: if only a user name (or numeric user ID) is given, that user is made the owner of each given file, and the files’ group is not changed. If the user name is followed by a colon and a group name (or numeric group ID), with no spaces between them, the group ownership of the files is changed as well.

The GNU version allows a dot instead of a colon (following BSD). [This was not allowed by POSIX since a dot is a valid character in a user name.] If a colon or dot but no group name follows the user name, that user is made the owner of the files and the group of the files is changed to that user’s login group. If the colon or dot and group are given, but the user name is omitted, only the group of the files is changed; in this case, chown performs the same function as chgrp.

-R	Recursively change ownership of directories and their contents.
--	Terminate option list.

-c, --changes
	Verbosely describe the action for each file whose ownership actually changes.
-f, --silent, --quiet
	Do not print error messages about files whose ownership cannot be changed.
-h, --no-dereference
	Act on symbolic links themselves instead of what they point to. Only available if the lchown system call is provided.
-v, --verbose
	Verbosely describe the action (or non-action) taken for every file.
-R, --recursive
	Recursively change ownership of directories and their contents.
--dereference
	Change the ownership of the target of a symbolic link instead of the symbolic link itself. (New in file utils-4.0.)
--reference=rfile
	(New in file utils 4.0.) Change the ownership of file to that of rfile.

--help	Print a usage message on standard output and exit successfully.
--version
	Print version information on standard output, then exit successfully.
--	Terminate option list.

The variables LANG, LC_ALL, LC_CTYPE and LC_MESSAGES have the usual meaning.

POSIX.2 does not allow use of the dot as separator between user name and group name.

This page describes chown as found in the fileutils-4.0 package; other versions may differ slightly.