chown(1) chown(1)
NAME
chown - change file owner
SYNOPSIS
chown [-h] [-R] owner[:group] file . . .
DESCRIPTION
chown changes the owner of the files to owner. The value of
owner may be either a decimal user ID or a login name found in
the /etc/passwd file. Login names in /etc/passwd must begin
with a non-numeric character; an alphabetic character or any
special character except colon is acceptable. chown will
optionally also change the group ID of the files to group.
The value of group may be either a decimal group ID or a group
name found in the group ID file /etc/group.
If chown is invoked by someone other than a privileged user,
the set-user-ID and set-group ID bit of the file mode, 04000,
is cleared.
Only the owner of a file (or a privileged user) may change the
owner or group of that file.
Valid options to chown are:
-R Recursive. chown descends through the directory, and
any subdirectories, setting the ownership (and group) ID
as it proceeds. When symbolic links are encountered,
they are traversed.
-h If the file is a symbolic link, change the owner (and
group) of the symbolic link. Without this option, the
owner (and group) of the file referenced by the symbolic
link is changed. (See NOTICES below.)
The operating system has a configuration option
{_POSIX_CHOWN_RESTRICTED}, to restrict ownership changes.
When this option is in effect the owner of the file is
prevented from changing the owner ID of the file, and may
change the group of the file to a group to which the owner
belongs. Only a privileged user can arbitrarily change owner
(and group) IDs whether this option is in effect or not. When
this option is in effect, only a privileged user can
arbitrarily change group IDs.
Copyright 1994 Novell, Inc. Page 1
chown(1) chown(1)
FILES
/etc/passwd
/usr/lib/locale/locale/LC_MESSAGES/uxcore.abi
language-specific message file [see LANG on environ(5)].
REFERENCES
chgrp(1), chmod(1), chown(2), passwd(4)
NOTICES
chown(1) does not check the user ID if it is in decimal form;
to check a user ID in this form, you can use chown(2).
Note that, with appropriate permissions, the owner of setuid
files might inadvertantly be changed.
Copyright 1994 Novell, Inc. Page 2