subsystem-name     Specifies a subsystem that contains the
                       attributes you want to modify. The subsystem
                       name and attributes are in a stanza input
                       file.

                       You must specify the subsystem name when
                       deleting (-d), adding (-a), or replacing (-u)
                       a subsystem.

                       In other cases, when you do not specify a
                       subsystem name, the operation is attempted for
                       all the subsystems and attributes specified in
                       the input file.