Installing gnuradio

UPDATE:

The installation instructions in the books are now completely out of date and do not support the most recent version of Ubuntu. Rather than provide a new set of instructions, we’ve simplified things by creating an installation script that handles almost everything. Please see the following post for details:

[Updated gnuradio Install Instructions] (https://factorialabs.com/2020/01/11/updated-gnuradio-install-instructions-2/)