william@beaglebone:~$ apt-cache search setserial
setserial - controls configuration of serial ports
william@beaglebone:~$ sudo apt-get install setserial
. . .
The following NEW packages will be installed:
setserial
0 upgraded, 1 newly installed, 0 to remove and 13 not upgraded.
Need to get 49.9 kB of archives.
After this operation, 139 kB of additional disk space will be used.
william@beaglebone:~$ setserial -g /dev/ttyS[0-5]
/dev/ttyS0, UART: 8250, Port: 0x0000, IRQ: 158
/dev/ttyS1, UART: unknown, Port: 0x0000, IRQ: 0
/dev/ttyS2, UART: 8250, Port: 0x0000, IRQ: 198
/dev/ttyS3, UART: unknown, Port: 0x0000, IRQ: 0
/dev/ttyS4, UART: unknown, Port: 0x0000, IRQ: 0
/dev/ttyS5, UART: unknown, Port: 0x0000, IRQ: 0