wlan0

pi@raspberrypi ~ $ sudo ifconfig wlan0 up; sudo iwlist wlan0 scan
wlan0     Scan completed :
          Cell 01 - Address: 00:19:CB:07:23:93
                    ESSID:"ZyXELMA"
                    Protocol:IEEE 802.11bg
                    Mode:Master
                    Frequency:2.437 GHz (Channel 6)
                    Encryption key:on
                    Bit Rates:54 Mb/s
                    Quality:0  Signal level:0  Noise level:0
          Cell 02 - Address: F4:C7:14:15:A7:D2
                    ESSID:"TELE2INTERNET-9995"
                    Protocol:IEEE 802.11bg
                    Mode:Master
                    Frequency:2.462 GHz (Channel 11)
                    Encryption key:on
                    Bit Rates:54 Mb/s
                    Extra:rsn_ie =30140100000fac020100000fac020100000fac020c00
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (1) : TKIP
                        Authentication Suites (1) : PSK
                    Quality:0  Signal level:0  Noise level:0