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 0x3f8
    mknod -m 660 /dev/ttyS1 c 4 65 # base address 0x2f8
    mknod -m 660 /dev/ttyS2 c 4 66 # base address 0x3e8
    mknod -m 660 /dev/ttyS3 c 4 67 # base address 0x2e8
    chown root:tty /dev/ttyS[0-3]

FILES
/dev/ttyS[0-3]

SEE ALSO
chown(1), mknod(1), tty(4), agetty(8), mingetty(8), setserial(8)