Command:   chown - change owner
Syntax:    chown [-R] owner[:group] file ...
Flags:     -R  Change directory hierarchies
Examples:  chown ast file1 file2    # Make ast the owner of the files
           chown -R ast:other dir   # Change the owner and group of  all
                                      files in dir

     The owner field (and optionally group field) of the named files  is
changed to owner (i.e., login name specified) and group.  Alternatively,
a decimal uid(gid) may be specified instead of a user  name.   Only  the
superuser may execute this command.