Seems like network namespaces doesn't work in Armbian 3.4 kernel.
Armbian 4.13 works fine.
Is it possible to fix it?
How to reproduce:
ip netns add test
ip netns exec test ip a
Armbian 3.4 shows all interfaces (it's wrong)
Armbian 4.13 shows only 1 interface (lo, it's ok)