My ubuntu 12.04 droplet is broken after update to 14.04

So I selected Boot from Recovery ISO

I launch console and select Attempt to chroot on installed system from menu list

I need working network to download some packages and restore my droplet. But there is no working network.

When I ping -c3 google.com

ping: unknown host google.com

What I did then is added DNS in my /etc/resolv.conf

nameserver 8.8.8.8
nameserver 8.8.4.4

But nothing happened and I still getting unkown host error. Maybe there is need to reload something for it to take place?

Any suggestions appreciated.