Тогда странно. Дождись любой реакции на eth0
Оно должно отвиснуть, рано или поздно. Хотя нормально оно пишет что-то вроде
anrdaemon@daemon-v1:~$ sudo dhclient eth0
[sudo] password for anrdaemon:
Internet Systems Consortium DHCP Client V3.1.3
Copyright 2004-2009 Internet Systems Consortium.
All rights reserved.
For info, please visit
https://www.isc.org/software/dhcp/Listening on LPF/eth0/08:00:27:61:d8:02
Sending on LPF/eth0/08:00:27:61:d8:02
Sending on Socket/fallback
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 4
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 6
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 7
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 8