Something

plantain@plantain-laptop:/dev$ cat /etc/network/interfaces
auto lo
iface lo inet loopback
address 127.0.0.1
netmask 255.0.0.0


iface eth0 inet dhcp

#ADD THIS TO YOUR INTERFACES file

auto eth1
iface eth1 inet dhcp
##########################


this should go in your wpa_supplicant.conf

network={
        ssid="Wifi"
        key_mgmt=NONE
	wep_key0=PUT YOUR KEY HERE
	wep_tx_keyidx=0
	priority=5
}