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Obtiene información detallada desde una interfaz inalámbrica.

iwlist wlan0 scan informa sobre las distintas redes wifi que detecte la interfaz wlan0 y las detalla.

# iwlist wlan0 scan
wlan0     Scan completed :
          Cell 01 - Address: xx:xx:xx:xx:xx:xx
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    Quality=28/70  Signal level=-82 dBm
                    Encryption key:on
                    ESSID:"Speedy"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 9 Mb/s
                              18 Mb/s; 36 Mb/s; 54 Mb/s
                    Bit Rates:6 Mb/s; 12 Mb/s; 24 Mb/s; 48 Mb/s
                    Mode:Master
                    Extra:tsf=0000003a326e98b9
                    Extra: Last beacon: 84ms ago
                    IE: Unknown: 000D5370656564792D304434324230
                    IE: Unknown: 010882848B961224486C
                    IE: Unknown: 030101
                    IE: Unknown: 2A0100
                    IE: Unknown: 32040C183060
                    IE: Unknown: 2D1A8E1103FFFF0000010000000000000000000000000C0000000000
                    IE: Unknown: 3D1601050100000000000000000000000000000000000000
                    IE: Unknown: 3E0100
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : TKIP CCMP
                        Authentication Suites (1) : PSK
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : TKIP CCMP
                        Authentication Suites (1) : PSK
                    IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00
                    IE: Unknown: 0B0500000B127A
                    IE: Unknown: 4A0E14000A002C01C800140005001900
                    IE: Unknown: 7F0101
                    IE: Unknown: DD07000C4307000000
                    IE: Unknown: 0706415220010D10
          Cell 02 - Address: xx:xx:xx:xx:xx:xx
                    Channel:2
                    Frequency:2.417 GHz (Channel 2)
                    Quality=22/70  Signal level=-88 dBm
                    Encryption key:on
                    ESSID:"Speedy2"
                    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
                    Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Master
                    Extra:tsf=000000920330ef74
                    Extra: Last beacon: 10764ms ago
                    IE: Unknown: 000D5370656564795F70396536357A
                    IE: Unknown: 010882848B0C12961824
                    IE: Unknown: 030102
                    IE: Unknown: 0706444520010D14
                    IE: Unknown: 200114
                    IE: Unknown: 2A0100
                    IE: Unknown: 32043048606C
          Cell 03 - Address: xx:xx:xx:xx:xx:xx
                    Channel:6
                    Frequency:2.437 GHz (Channel 6)
                    Quality=31/70  Signal level=-79 dBm
                    Encryption key:on
                    ESSID:"Speedy3"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 9 Mb/s
                              18 Mb/s; 36 Mb/s; 54 Mb/s
                    Bit Rates:6 Mb/s; 12 Mb/s; 24 Mb/s; 48 Mb/s
                    Mode:Master
                    Extra:tsf=00000058a5e4caf5
                    Extra: Last beacon: 9224ms ago
                    IE: Unknown: 000D5370656564792D304233324141
                    IE: Unknown: 010882848B961224486C
                    IE: Unknown: 030106
                    IE: Unknown: 2A0100
                    IE: Unknown: 32040C183060
                    IE: Unknown: 2D1A8E1103FFFF0000010000000000000000000000000C0000000000
                    IE: Unknown: 3D1606000100000000000000000000000000000000000000
                    IE: Unknown: 3E0100
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : TKIP CCMP
                        Authentication Suites (1) : PSK
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : TKIP CCMP
                        Authentication Suites (1) : PSK
                    IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00
                    IE: Unknown: 0B05000045127A
                    IE: Unknown: 4A0E14000A002C01C800140005001900
                    IE: Unknown: 7F0101
                    IE: Unknown: DD07000C4307000000
                    IE: Unknown: 0706415220010D10
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iwlist wlan0 frequency lista los canales soportados por la interfaz.

# iwlist wlan0 frequency
wlan0     24 channels in total; available frequencies :
          Channel 01 : 2.412 GHz
          Channel 02 : 2.417 GHz
          Channel 03 : 2.422 GHz
          Channel 04 : 2.427 GHz
          Channel 05 : 2.432 GHz
          Channel 06 : 2.437 GHz
          Channel 07 : 2.442 GHz
          Channel 08 : 2.447 GHz
          Channel 09 : 2.452 GHz
          Channel 10 : 2.457 GHz
          Channel 11 : 2.462 GHz
          Channel 36 : 5.18 GHz
          Channel 40 : 5.2 GHz
          Channel 44 : 5.22 GHz
          Channel 48 : 5.24 GHz
          Channel 52 : 5.26 GHz
          Channel 56 : 5.28 GHz
          Channel 60 : 5.3 GHz
          Channel 64 : 5.32 GHz
          Channel 149 : 5.745 GHz
          Channel 153 : 5.765 GHz
          Channel 157 : 5.785 GHz
          Channel 161 : 5.805 GHz
          Channel 165 : 5.825 GHz
          Current Frequency=2.462 GHz (Channel 11)