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NetBSD 6.1.5 - man page for chown (netbsd section 8)

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

NAME
     chown -- change file owner and group

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

DESCRIPTION
     chown sets the user ID and/or the group ID of the specified files.

     The options are as follows:

     -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.)

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

     -P      If the -R option is specified, no symbolic links are followed.

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

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

     -h      If file is a symbolic link, the owner and/or group of the link is changed.

     -v      Cause chown to be verbose, showing files as they are processed.

     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 speci-
     fied.

     The -L option cannot be used together with the -h option.

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

     The owner may be either a user name or a numeric user ID.	The group may be either a group
     name or a numeric group ID.  Since it is valid to have a user or group name that is numeric
     (and doesn't have the numeric ID that matches its name) the name lookup is always done
     first.  Preceding an ID with a ``#'' character will force it to be taken as a number.

     The ownership of a file may only be altered by a super-user for obvious security reasons.

     Unless invoked by the super-user, chown clears the set-user-id and set-group-id bits on a
     file to prevent accidental or mischievous creation of set-user-id and set-group-id programs.

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

COMPATIBILITY
     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.

SEE ALSO
     chflags(1), chgrp(1), find(1), chown(2), lchown(2), fts(3), symlink(7)

STANDARDS
     The chown command is expected to be POSIX 1003.2 compliant.

     The -v option and the use of ``#'' to force a numeric lookup are extensions to IEEE Std
     1003.2 (``POSIX.2'').

BSD					 December 9, 2005				      BSD
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