Ubuntu no network connection, what could be the problem?

Question

linux

I am a beginner in linux (trying to learn), installed ubuntu on a separate disk, while there is no network connection to the system during the course. The result of 'lspci' https://pastenow.ru/617a96092ec07cc35788ebaf85b11dfd
if you execute 'lsmod' - then r8169 is in the list, 'modprobe r8169' - there is no error.
'ip' shows only one entry with lo. Why there is no line with eth - I can not understand.
The /etc/network/interfaces file only has 2 lines for lo.
What is the problem I can not understand. I will be glad to help.

Answer 1

Look at nmcli device status, maybe network manager manages your networks.
Or just write it manually in interfaces and reboot network