$ gpg --keyserver pgp.mit.edu --recv-keys FE74E9EECC91E5C1
$ gpg --export FE74E9EECC91E5C1 | apt-key add -

$ echo "deb [arch=amd64] http://apt.azat.now.im/ azat main" >> /etc/apt/sources.list.d/azat.list
OR by IP address:
$ echo "deb [arch=amd64] http://95.161.166.82/ azat main" >> /etc/apt/sources.list.d/azat.list

$ apt-get update