9.1.4 Adding a Modem

9.1.4.1 Make the device node

The mknod command builds the special file that you want the kernel to recognize as the modem, cua0. It should be a character type file with major and minor numbers of 12 and 128, respectively. This corresponds to the same physical line as ttya, with major and minor numbers of 12 and 0, respectively. The commands to create the device and set the proper permissions and ownerships are:

# mknod cua0 c 12 128
# chmod 600 cua0
# chown uucp cua0

Unix System Administration - 8 AUG 1996

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