$ lspci | grep Ethernet
$ lspci | grep Ethernet
olej@ACER:~$ lspci | grep Ethernet
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 06)
olej@astra:~$ /sbin/ifconfig -a
...