TTYS Section: Linux Programmer's Manual (4) Updated: 19 December 2024 Index   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   Index NAME DESCRIPTION FILES SEE ALSO This document was created by using the manual pages. Time: 12:11:43 GMT, March 24, 2025