root@bt:~# ifconfig -a
[...]
eth0   Link encap:Ethernet  HWaddr 00:0c:29:7c:e7:6a
       inet addr:192.168.11.138  Bcast:192.168.11.255  Mask:255.255.255.0
       inet6 addr: fe80::20c:29ff:fe7c:e76a/64 Scope:Link
[...]
root@bt:~# ip -6 addr
[...]
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436
    inet6 ::1/128 scope host
    valid_lft forever preferred_lft forever
[...]
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
    inet6 fe80::20c:29ff:fecf:6aba/64 scope link
    valid_lft forever preferred_lft forever