[lekernel@localhost ~]$ fuser /dev/ttyUSB0
/dev/ttyUSB0: 5578
[lekernel@localhost ~]$ fuser /dev/ttyUSB0
/dev/ttyUSB0: 5578
[lekernel@localhost ~]$ fuser /dev/ttyUSB0
/dev/ttyUSB0: 5581
[lekernel@localhost ~]$ fuser /dev/ttyUSB0
/dev/ttyUSB0: 5581
[lekernel@localhost ~]$ fuser /dev/ttyUSB0
/dev/ttyUSB0: 5584
[lekernel@localhost ~]$ fuser /dev/ttyUSB0
/dev/ttyUSB0: 5586
[lekernel@localhost ~]$ fuser /dev/ttyUSB0
/dev/ttyUSB0: 5588