root@ubuntu:~# cat /etc/network/interfaces
# The loopback network interface
auto lo
iface lo inet loopback

auto wlan2
iface wlan2 inet static
        address 10.0.0.6
        network 10.0.0.0
        netmask 255.255.255.0
        broadcast 10.0.0.255
        wireless-channel 3
        wireless-essid adhoc_wlan
        wireless-mode ad-hoc
        wireless-ap D6:74:1B:C2:38:41

root@ubuntu:~# iwconfig
wlan2     IEEE 802.11bgn  ESSID:"adhoc_wlan"
          Mode:Ad-Hoc  Frequency:2.422 GHz  Cell: D6:74:1B:C2:38:41
          Tx-Power=20 dBm
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off

lo        no wireless extensions.

root@ubuntu:~# ifconfig
lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:16 errors:0 dropped:0 overruns:0 frame:0
          TX packets:16 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1792 (1.7 KiB)  TX bytes:1792 (1.7 KiB)

wlan2     Link encap:Ethernet  HWaddr 00:19:70:94:7c:8b
          inet addr:10.0.0.6  Bcast:10.0.0.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:49 errors:0 dropped:15 overruns:0 frame:0
          TX packets:43 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:3414 (3.3 KiB)  TX bytes:3342 (3.2 KiB)

root@ubuntu:~# ip r
10.0.0.0/24 dev wlan2  proto kernel  scope link  src 10.0.0.6
root@ubuntu:~# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
2: wlan2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    link/ether 00:19:70:94:7c:8b brd ff:ff:ff:ff:ff:ff
    inet 10.0.0.6/24 brd 10.0.0.255 scope global wlan2
root@ubuntu:~# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
10.0.0.0        *               255.255.255.0   U     0      0        0 wlan2