Hi, I have added /dev/ttyS4 using mknod command on Ubuntu 8.04 Server. mknod /dev/ttyS4 c 4 68 chown root.dialout /dev/ttyS4 chmod 600 /dev/ttyS4 when i run minicom i get minicom: cannot open /dev/ttyS4 : No such device or address Am i missing something Thanks, Kaushal