Ubuntu: Missing network interface and no UI

I'm running 14.04.5 and somehow my system got into a state where my nVidia drivers, lightdm, and all window managers seemed to contribute to a broken graphical system. So, I uninstalled all of it while keeping the base system. I can now boot to a prompt.

However, I don't have a valid wired network interface any more.

I attempted to add my bootable USB drive as an Apt repository and updated, except nothing seemed to be findable/installable. So, I took it back out. This to say that I don't currently have a way to install any packages.

I see that the e1000e kernel module is loaded, so my network interface should be accessible. I tried deleting /etc/udev/rules.d/70-persistent-net.rules (implied that it might work here: ) and then rebooting, but nothing changed.

I'd appreciate some insight. Thanks.

6

1 Answer

To show all physical interfaces (in any state):

ip link show

To specifically show eth0:

ip link show eth0

This might show:

2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN mode DEFAULT group default qlen 1000 link/ether 3c:97:0e:bb:8e:a8 brd ff:ff:ff:ff:ff:ff

Note that it's down.

To configure the interface for DHCP and bring it up:

dhclient eth0
ip link set eth0 up

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