1ttyS(4)                    Kernel Interfaces Manual                    ttyS(4)
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NAME

6       ttyS - serial terminal lines
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DESCRIPTION

9       ttyS[0-3] are character devices for the serial terminal lines.
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11       They are typically created by:
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13           mknod -m 660 /dev/ttyS0 c 4 64 # base address 0x3f8
14           mknod -m 660 /dev/ttyS1 c 4 65 # base address 0x2f8
15           mknod -m 660 /dev/ttyS2 c 4 66 # base address 0x3e8
16           mknod -m 660 /dev/ttyS3 c 4 67 # base address 0x2e8
17           chown root:tty /dev/ttyS[0-3]
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FILES

20       /dev/ttyS[0-3]
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SEE ALSO

23       chown(1), mknod(1), tty(4), agetty(8), mingetty(8), setserial(8)
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27Linux man-pages 6.05              2022-10-30                           ttyS(4)