...hown 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)...1), ioctl (2), ioctl_console (2), ioctl_tty (2), termios (3), ttyS (4), vcs (4), pty (7), agetty (8), mingetty (8)