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28 .\" from: @(#)chown.8 8.3 (Berkeley) 3/31/94
29 .\" $NetBSD: chown.8,v 1.10 2016/09/11 01:23:26 sevan Exp $
31 .Dd September 11, 2016
36 .Nd change file owner and group
41 .Op Fl H | Fl L | Fl P
44 .Ar owner Ns Op Ar :group
49 .Op Fl H | Fl L | Fl P
57 .Op Fl H | Fl L | Fl P
60 .Fl Fl reference=rfile
64 sets the user ID and/or the group ID of the specified files.
65 Symbolic links named by arguments are silently left unchanged unless
69 The options are as follows:
74 option is specified, symbolic links on the command line are followed.
75 (Symbolic links encountered in the tree traversal are not followed.)
79 option is specified, all symbolic links are followed.
83 option is specified, no symbolic links are followed.
85 Change the user ID and/or the group ID for the file hierarchies rooted
86 in the files instead of just the files themselves.
88 Do not report any failure to change file owner or group, nor modify
89 the exit status to reflect such failures.
93 is a symbolic link, the owner and/or group of the link is changed.
97 to be verbose, showing files as they are processed.
105 options are ignored unless the
108 In addition, these options override each other and the
109 command's actions are determined by the last one specified.
110 The default is as if the
112 option had been specified.
116 option cannot be used together with the
124 operands are both optional, however, one must be specified; alternatively,
125 both the owner and group may be specified using a reference
132 operand is specified, it must be preceded by a colon (``:'') character.
136 may be either a user name or a numeric user ID.
139 may be either a group name or a numeric group ID.
140 Since it is valid to have a user or group name that is numeric (and
141 does not have the numeric ID that matches its name) the name lookup
142 is always done first.
143 Preceding an ID with a ``#'' character will force it to be taken
146 The ownership of a file may only be altered by a super-user for
147 obvious security reasons.
149 Unless invoked by the super-user,
151 clears the set-user-id and set-group-id bits on a file to prevent
152 accidental or mischievous creation of set-user-id and set-group-id
157 utility exits 0 on success, and \*[Gt]0 if an error occurs.
159 Previous versions of the
161 utility used the dot (``.'') character to distinguish the group name.
162 This has been changed to be a colon (``:'') character so that user and
163 group names may contain the dot character.
180 command is expected to be POSIX 1003.2 compliant.
184 option and the use of ``#'' to force a numeric lookup