TTYS(4)

NAME
ttys - serial terminal lines

DESCRIPTION
ttyS[0-3] are character devices for the serial terminal lines.

They are typically created by:

    mknod -m 660 /dev/ttyS0 c 4 64 # base address 0x03f8
    mknod -m 660 /dev/ttyS1 c 4 65 # base address 0x02f8
    mknod -m 660 /dev/ttyS2 c 4 66 # base address 0x03e8
    mknod -m 660 /dev/ttyS3 c 4 67 # base address 0x02e8
    chown root.tty /dev/ttyS[0-3]

FILES
/dev/ttyS[0-3]

SEE ALSO
mknod(1), chown(1), getty(1), tty(4)