root@sm-test2-trusty:~# sudo dhclient -1 -v -v -v eth0
sudo: unable to resolve host sm-test2-trusty
Internet Systems Consortium DHCP Client 4.2.4
Copyright 2004-2012 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Listening on LPF/eth0/00:16:3e:d3:d0:19
Sending on LPF/eth0/00:16:3e:d3:d0:19
Sending on Socket/fallback
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3 (xid=0xa1e03e60)
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 4 (xid=0xa1e03e60)
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 6 (xid=0xa1e03e60)
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 12 (xid=0xa1e03e60)
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 6 (xid=0xa1e03e60)
No DHCPOFFERS received.
No working leases in persistent database - sleeping.
root@sm-test2-trusty:~# echo $?
0