The Ubuntu 14.04.3 LTS installation kernel doesn't support the Intel i219V gigabit controller.
To enable networking under Ubuntu 14.04.3 LTS first install the system without networking.
Next, download an updated e1000e driver.
Place the driver on a memory stick and copy it to the following location on the newly installed system:
/lib/modules/$(uname -r)/kernel/drivers/net/ethernet/intel/e1000e
Finally run the following command:
$ sudo depmod -a
Reboot the system and use the ifconfig command to verify that the network interface is active. The dnf command can now be used to update the kernel to a version which contains support for the i219V controller:
$ sudo apt-get update $ sudo apt-get dist-upgrade $ sudo apt-get install linux-generic-lts-vivid