dave@debian:~$ su
Password:
debian:/home/dave# wifi-radar
dhclient3 --version 2>&1
eth2      Interface doesn't support scanning.

eth2: error fetching interface information: Device not found
eth2      No such device

debian:/home/dave# iwconfig
lo        no wireless extensions.

eth1      no wireless extensions.

eth0      no wireless extensions.

wlan0     IEEE 802.11g  ESSID:off/any
          Mode:Managed  Frequency:7.202 GHz  Access Point: Not-Associated
          Bit Rate:11 Mb/s
          RTS thr:2347 B   Fragment thr:2346 B
          Encryption key:off
          Power Management:off
          Link Quality:0/100  Signal level:56/154  Noise level:160/154
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

sit0      no wireless extensions.

debian:/home/dave# iwlist scan
lo        Interface doesn't support scanning.

eth1      Interface doesn't support scanning.

eth0      Interface doesn't support scanning.

wlan0     Scan completed :
          Cell 01 - Address: 00:14:6C:B5:C7:04
                    ESSID:"SKY13065"
                    Protocol:IEEE 802.11g
                    Mode:Managed
                    Frequency:2.412 GHz (Channel 1)
                    Quality:25/100  Signal level:-80 dBm  Noise level:-96 dBm
                    Encryption key:on
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 6 Mb/s; 9 Mb/s
                              11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
                              48 Mb/s; 54 Mb/s
                    Extra:bcn_int=100
                    Extra:atim=0
                    IE: WPA Version 1
                        Group Cipher : WEP-40
                        Pairwise Ciphers (1) : WEP-40
                        Authentication Suites (1) : PSK
          Cell 02 - Address: 00:0D:88:B8:B2:C8
                    ESSID:"default"
                    Protocol:IEEE 802.11g
                    Mode:Managed
                    Frequency:2.437 GHz (Channel 6)
                    Quality:100/100  Signal level:-30 dBm  Noise level:-96 dBm
                    Encryption key:on
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
                              12 Mb/s; 24 Mb/s; 36 Mb/s; 9 Mb/s; 18 Mb/s
                              48 Mb/s; 54 Mb/s
                    Extra:bcn_int=100
                    Extra:atim=0
          Cell 03 - Address: 00:14:6C:7D:65:E2
                    ESSID:"Penny"
                    Protocol:IEEE 802.11g
                    Mode:Managed
                    Frequency:2.437 GHz (Channel 6)
                    Quality:34/100  Signal level:-74 dBm  Noise level:-96 dBm
                    Encryption key:on
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
                              12 Mb/s; 24 Mb/s; 36 Mb/s; 9 Mb/s; 18 Mb/s
                              48 Mb/s; 54 Mb/s
                    Extra:bcn_int=100
                    Extra:atim=0

sit0      Interface doesn't support scanning.

debian:/home/dave# wifi-radar
dhclient3 --version 2>&1
eth2      Interface doesn't support scanning.

eth2: error fetching interface information: Device not found
eth2      No such device