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14.3.12. Loopback interface does not work

Question:
When I boot Linux I get a "socket: Address family not supported by protocol" error message when I try to configure the loopback interface. What's wrong?

Answer:
This is most probably a problem with your kernel configuration. Make sure that the CONFIG_PACKET option is selected.
14.3.11. Ethernet does not work in Linux 1. Abstract 14.3.13. Linux kernel messages are not printed on the console
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