

          chown owner|{owner group} filelist
               Set owner of each file in the list filelist to owner,
               which is a owner name or numeric owner id.  If the
               first parameter is a list, then the owner is set to the
               first element of the list and the group is set to the
               second element of the list. Group is a group name or
               numeric group id.  If group is {}, then the file group
               will be set to the group for the associated the
               specified user.
