Serial console is not /dev/modem

Remote Serial Console HOWTO
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# 7.4. Serial console is not `/dev/modem`

In many Linux distributions the file `/dev/modem` is a symbolic link to the serial port containing a modem which is available for use.

Although the serial console is a serial port with a modem, we certainly don't want it used to place an outgoing call.

Check that `/dev/modem` does not point to the serial port being used for the console, say `/dev/ttyS0`. If it does, then remove the symbolic link.

Figure 7-5. Remove `/dev/modem` if it points to the serial console's port

    bash$ ls -l /dev/modem
    lrwxrwxrwx 1 root root 10 Jan 01 00:00 /dev/modem -> /dev/ttyS0
    bash# rm /dev/modem

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