Извлечь доступные Wi-Fi-сети на Ubuntu

Question

Я начинаю изучать Ubuntu 9.10. Как я могу программно получить все доступные Wi-Fi-сети? Может ли кто-нибудь привести пример?

Answer 1

sudo iwlist wlan0 scan 

где wlan0 - ваш wifi-интерфейс.

Answer 2

Для лучшего выхода, сортировка из наибольший (-43 дБм) до самых слабых (-87 дБм) сигналов для каждой сети:

$ iwlist wlan0 scanning | egrep 'Cell |Encryption|Quality|ESSID' | tr '\n' ' ' | sed 's/Cell/\nCell/g' | sort -k 8 | sed 's/ //g' 

будет производить следующий вывод:

Cell 01 - Address: 20:08:ED:C3:29:F4  Quality=67/70 Signal level=-43 dBm  Encryption key:on  ESSID:"INFINITUM57yt" 
Cell 03 - Address: 38:BC:01:94:CA:98  Quality=45/70 Signal level=-65 dBm  Encryption key:on  ESSID:"KATKENAKI" 
Cell 15 - Address: A4:B1:E9:57:44:03  Quality=42/70 Signal level=-68 dBm  Encryption key:on  ESSID:"INFINITUM574403" 
Cell 07 - Address: 78:D7:52:D2:70:38  Quality=37/70 Signal level=-73 dBm  Encryption key:on  ESSID:"palehouse" 
Cell 02 - Address: C8:3A:35:14:5E:F0  Quality=35/70 Signal level=-75 dBm  Encryption key:off  ESSID:"Tenda_145EF0" 
Cell 05 - Address: 64:70:02:A8:E8:AD  Quality=35/70 Signal level=-75 dBm  Encryption key:off  ESSID:"ThomasJefferson" 
Cell 11 - Address: D0:05:2A:99:3C:92  Quality=35/70 Signal level=-75 dBm  Encryption key:on  ESSID:"INFINITUM4183" 
Cell 08 - Address: 9C:97:26:D3:ED:9D  Quality=33/70 Signal level=-77 dBm  Encryption key:on  ESSID:"INFINITUMD3ED9D" 
Cell 04 - Address: F8:1A:67:70:71:04  Quality=33/70 Signal level=-77 dBm  Encryption key:on  ESSID:"TP-LINK_707104" 
Cell 14 - Address: 64:66:B3:8B:F0:C8  Quality=30/70 Signal level=-80 dBm  Encryption key:on  ESSID:"ola q ace robando el wifi oq ace" 
Cell 12 - Address: 9C:2A:70:4B:85:D9  Quality=29/70 Signal level=-81 dBm  Encryption key:off  ESSID:"HP-Print-D9-LaserJet 1025" 
Cell 10 - Address: F4:F2:6D:C2:7A:48  Quality=25/70 Signal level=-85 dBm  Encryption key:on  ESSID:"AppGarage" 
Cell 13 - Address: 20:25:64:8E:B8:88  Quality=25/70 Signal level=-85 dBm  Encryption key:on  ESSID:"f46f84" 
Cell 09 - Address: 60:E3:27:EC:CE:14  Quality=25/70 Signal level=-85 dBm  Encryption key:on  ESSID:"INFINITUM57yt" 
Cell 06 - Address: 04:9F:CA:23:A0:00  Quality=23/70 Signal level=-87 dBm  Encryption key:on  ESSID:"Totalplay-F07C"