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30 .\" from: @(#)chown.8 8.3 (Berkeley) 3/31/94
32 .Dd $Mdocdate: March 9 2011 $
37 .Nd change file owner and group
45 .Ar owner Ns Op : Ns Ar group
57 sets the user ID and/or the group ID of the specified files.
59 The options are as follows:
64 option is specified, symbolic links on the command line are followed.
65 (Symbolic links encountered in the tree traversal are not followed.)
67 Change the user ID and/or the group ID on symbolic links.
72 options are mutually exclusive.
76 option is specified, all symbolic links are followed.
80 option is specified, no symbolic links are followed.
82 Change the user ID and/or the group ID for the file hierarchies rooted
83 in the files instead of just the files themselves.
91 options are ignored unless the
94 In addition, these options override each other and the
95 command's actions are determined by the last one specified.
101 operands are both optional; however, one must be specified.
104 operand is specified, it must be preceded by a colon
110 may be either a numeric user ID or a user name.
111 If a user name is also a numeric user ID, the operand is used as a
115 may be either a numeric group ID or a group name.
116 If a group name is also a numeric group ID, the operand is used as a
121 clears the set-user-ID and set-group-ID bits on the file
122 to prevent accidental or mischievous creation of
123 set-user-ID and set-group-ID programs.
124 This behaviour can be overridden by setting the
130 Only the superuser is permitted to change the owner of a file.
142 utility is compliant with the
146 Previous versions of the
150 character to distinguish the group name.
151 This has been changed to be a colon
153 character so that user and
154 group names may contain the dot character.