Running on Ubuntu 18.04. Here is an example via command-line:
sudo ip netns add testBB sudo ip netns list sudo ip netns exec testBB ip link set vnet4 netns testBB sudo ip netns exec testBB ip link set eno3.50 netns testBB sudo ip netns exec testBB ip link set vnet4 up sudo ip netns exec testBB ip link set eno3.50 up
But this is not permanent. I would like to set up above configuration in
/etc/netplan/eno3.yaml.
How can I do that?