Man page - ttys(4)

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Documentations in package:

manpages

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Manual

ttyS

NAME
DESCRIPTION
FILES
SEE ALSO

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]