I am running Ubuntu 20. I am running it inside a LXC container. I set a static IP, and do a reboot, and I am back to dhcp again. I look at the file, and all of my changes are lost. I did notice that my interface name changes. The format is: eth0@nnn. I tried for the match section, eth0@*, but that did not work. How do I make my changes persistent upon a reboot?