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chown(8)                  BSD System Manager's Manual                 chown(8)


     chown -- change file owner and group


     chown [-fhv] [-R [-H | -L | -P]] owner[:group] file ...
     chown [-fhv] [-R [-H | -L | -P]] :group file ...


     The chown utility changes the user ID and/or the group ID of the speci-
     fied files.  Symbolic links named by arguments are silently left
     unchanged unless -h is used.

     The options are as follows:

     -f      Don't report any failure to change file owner or group, nor mod-
             ify the exit status to reflect such failures.

     -H      If the -R option is specified, symbolic links on the command line
             are followed.  (Symbolic links encountered in the tree traversal
             are not followed.)

     -h      If the file is a symbolic link, change the user ID and/or the
             group ID of the link itself.

     -L      If the -R option is specified, all symbolic links are followed.

     -P      If the -R option is specified, no symbolic links are followed.
             Instead, the user and/or group ID of the link itself are modi-
             fied.  This is the default. Use -h to change the user ID and/or
             the group of symbolic links.

     -R      Change the user ID and/or the group ID for the file hierarchies
             rooted in the files instead of just the files themselves.

     -v      Cause chown to be verbose, showing files as the owner is modi-

     The -H, -L and -P options are ignored unless the -R option is specified.
     In addition, these options override each other and the command's actions
     are determined by the last one specified.

     The owner and group operands are both optional; however, at least one
     must be specified.  If the group operand is specified, it must be pre-
     ceded by a colon (``:'') character.

     The owner may be either a numeric user ID or a user name.  If a user name
     is also a numeric user ID, the operand is used as a user name.  The group
     may be either a numeric group ID or a group name.  If a group name is
     also a numeric group ID, the operand is used as a group name.

     For obvious security reasons, the ownership of a file may only be altered
     by a super-user.  Similarly, only a member of a group can change a file's
     group ID to that group.


     The chown utility exits 0 on success, and >0 if an error occurs.


     Previous versions of the chown utility used the dot (``.'') character to
     distinguish the group name.  This has been changed to be a colon (``:'')
     character, so that user and group names may contain the dot character.

     On previous versions of this system, symbolic links did not have owners.

     The -v option is non-standard and its use in scripts is not recommended.


     In legacy mode, the -R and -RP options do not change the user ID or the
     group ID of symbolic links.


     chgrp(1), find(1), chown(2), fts(3), compat(5), symlink(7)


     The chown utility is expected to be IEEE Std 1003.2 (``POSIX.2'') compli-


     A chown utility appeared in Version 1 AT&T UNIX.

BSD                             March 31, 1994                             BSD

Mac OS X 10.8 - Generated Mon Sep 3 17:11:39 CDT 2012
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