Ethernet interface gone after update

Yesterday I added blackarch keyring in order to install some of the programs of this OS in together with endeavour. I noticed that after addind the keyring and running pacman -Syu the eth0 interface is now gone and not listed anymore in ip link command and therefore I can’t connect to the internet using cable. How to solve this? thx in advance.

yea not a good ide to simply install package updates from another Distro at first… i do not how BlackArch is setup the kernels and repositories.
You could take a closer look into pacman log:
cat /var/log/pacman.log

And if you want playing with penetration testing better take BlackArch directly, as we can not recommend this and we can not support this term at our forum.