root@monster:~ # ifconfig wlan0 down
root@monster:~ # ifconfig wlan0 country GB
root@monster:~ # ifconfig wlan0
wlan0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
ether ac:22:0b:c7:49:69
nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
media: IEEE 802.11 Wireless Ethernet autoselect (autoselect)
status: no carrier
ssid "" channel 1 (2412 MHz 11b)
regdomain ETSI [B]country GB[/B] authmode WPA2/802.11i privacy OFF
txpower 30 bmiss 7 scanvalid 60 wme
root@monster:~ # ifconfig wlan0 list chan
Channel 1 : 2412 MHz 11g Channel 52 : 5260* MHz 11a
Channel 2 : 2417 MHz 11g Channel 56 : 5280* MHz 11a
Channel 3 : 2422 MHz 11g Channel 60 : 5300* MHz 11a
Channel 4 : 2427 MHz 11g Channel 64 : 5320* MHz 11a
Channel 5 : 2432 MHz 11g Channel 100 : 5500* MHz 11a
Channel 6 : 2437 MHz 11g Channel 104 : 5520* MHz 11a
Channel 7 : 2442 MHz 11g Channel 108 : 5540* MHz 11a
Channel 8 : 2447 MHz 11g Channel 112 : 5560* MHz 11a
Channel 9 : 2452 MHz 11g Channel 116 : 5580* MHz 11a
Channel 10 : 2457 MHz 11g Channel 120 : 5600* MHz 11a
[B]Channel 11[/B] : 2462 MHz 11g Channel 124 : 5620* MHz 11a
[B]Channel 36[/B] : 5180 MHz 11a Channel 128 : 5640* MHz 11a
Channel 40 : 5200 MHz 11a Channel 132 : 5660* MHz 11a
Channel 44 : 5220 MHz 11a Channel 136 : 5680* MHz 11a
Channel 48 : 5240 MHz 11a Channel 140 : 5700* MHz 11a
root@monster:~ # ifconfig wlan0 channel 13
ifconfig: unknown/undefined channel number 13 flags 0x0