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CHOWN(1) User Commands CHOWN(1)
NAME
chown - change file owner and group
SYNOPSIS
chown [OPTION]... [OWNER][:[GROUP]] FILE...
chown [OPTION]... --reference=RFILE FILE...
DESCRIPTION
This manual page documents the GNU version of chown.
chown changes the user and/or group ownership of each
given file, according to its first non-option argument,
which is interpreted 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 or dot
and a group name (or numeric group ID), with no spaces
between them, the group ownership of the files is
changed as well. 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.
OPTIONS
Change the owner and/or group of each FILE to OWNER
and/or GROUP. With --reference, change the owner and
group of each FILE to those of RFILE.
-c, --changes
like verbose but report only when a change is
made
--dereference
affect the referent of each symbolic link, rather
than the symbolic link itself (this is the
default)
-h, --no-dereference
affect each symbolic link instead of any refer-
enced file (useful only on systems that can
change the ownership of a symlink)
--from=CURRENT_OWNER:CURRENT_GROUP
change the owner and/or group of each file only
if its current owner and/or group match those
specified here. Either may be omitted, in which
case a match is not required for the omitted
attribute.
--no-preserve-root do not treat `/' specially (the
default)
--preserve-root
fail to operate recursively on `/'
-f, --silent, --quiet
suppress most error messages
--reference=RFILE
use RFILE's owner and group rather than the spec-
ifying OWNER:GROUP values
-R, --recursive
operate on files and directories recursively
-v, --verbose
output a diagnostic for every file processed
The following options modify how a hierarchy is tra-
versed when the -R option is also specified. If more
than one is specified, only the final one takes effect.
-H if a command line argument is a symbolic link to
a directory, traverse it
-L traverse every symbolic link to a directory
encountered
-P do not traverse any symbolic links (default)
--help display this help and exit
--version
output version information and exit
Owner is unchanged if missing. Group is unchanged if
missing, but changed to login group if implied by a `:'
following a symbolic OWNER. OWNER and GROUP may be
numeric as well as symbolic.
AUTHOR
Written by David MacKenzie and Jim Meyering.
REPORTING BUGS
Report bugs to <bug-coreutils@gnu.org>.
COPYRIGHT
Copyright (C) 2004 Free Software Foundation, Inc.
This is free software; see the source for copying condi-
tions. There is NO warranty; not even for MERCHANTABIL-
ITY or FITNESS FOR A PARTICULAR PURPOSE.
SEE ALSO
The full documentation for chown is maintained as a Tex-
info manual. If the info and chown programs are prop-
erly installed at your site, the command
info chown
should give you access to the complete manual.
chown 5.3.0 November 2004 CHOWN(1)
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