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ethtool -i <network card> <network card> can be eth0 etc. Example output:
driver: e1000 version: 7.3.21-k4.1-NAPI firmware-version: N/A bus-info: 0000:02:00.0
The bus-info can be coupled with lspci
lspci -s -v "2:"
Where 2: is taken from bus-info.