Thanks for your replies guy:
@Igor
fux@bananapipro:~$ cat /etc/network/interfaces
source /etc/network/interfaces.d/*
# Network is managed by Network manager
auto lo
iface lo inet loopback
dns-nameservers 192.168.1.1 8.8.8.8
fux@bananapipro:~$ cat /etc/netplan
cat: /etc/netplan: No such file or directory
fux@bananapipro:~$ /etc/networkmanager/system-connections
-bash: /etc/networkmanager/system-connections: No such file or directory
fux@bananapipro:~$ cat /etc/networkmanager/system-connections
cat: /etc/networkmanager/system-connections: No such file or directory
I just used nmtui as far I am aware.
@sfx2000
No seems to be stable. Neither deleting the newly created eth0 configs nor the reboot changes the mac address.
Oh and what is interesting is that it always greats the same new ip6 addres.
Thanks