//sys/class/tty/ttyS2/subsystem/tty20/subsystem/tty47/subsystem/tty21/subsystem/tty59/subsystem/tty54/subsystem/tty16/subsystem/tty57/subsystem/tty56/subsystem/tty9/subsystem/ttyS1/subsystem/tty25/subsystem/ttyS0/dev