//sys/class/tty/tty21/subsystem/tty63/subsystem/tty40/subsystem/ttyS2/subsystem/tty49/subsystem/tty42/subsystem/tty45/subsystem/tty4/subsystem/ttyS0/subsystem/tty18/subsystem/tty29/subsystem/tty38/subsystem/tty15/dev