Last update: 17 march 2022.

In order to have a wired ethernet connection available under GLLFSC, I recommend you follow the following steps.


First, you have to find the model of your ethernet card:

lspci | grep -i ethernet

For Dell Optiplex 745, the result of the previous command is:

03:00.0 Ethernet controller: Broadcom Inc. and subsidiaries NetXtreme \
BCM5754 Gigabit Ethernet PCI Express (rev 02)


To make your ethernet card work, you need to compile the corresponding driver with the kernel Linux, built-in or as a module. To know which driver of the kernel corresponds to your ethernet card, I encourage you to browse My search with BCM5754 informs me that this card uses the free driver tg3.


In general, the network interface for a wired connection is named eth0. You may need to activate this interface:

ifconfig eth0 up

IP attribution

If you have chosen to use DHCPCD, dynamic IP attribution to eth0 is done with:

dhcpcd eth0

Problems and solutions

If ifconfig hangs, try to reinstall inetutils.

Connection script

To connect to the internet, I wrote a script named under /bin with the following content:

# Exit on error:
set -e

ifconfig eth0 up
dhcpcd eth0

exit 0