root@mepis1:/home/mic# iwconfig wlan0 essid
Error for wireless request "Set ESSID" (8B1A) :
    too few arguments.
root@mepis1:/home/mic# iwlist wlan0 scan
wlan0     Scan completed :
          Cell 01 - Address: 00:09:5B:51:70:7E
                    ESSID:"NETGEAR"
                    Protocol:IEEE 802.11b
                    Mode:Managed
                    Frequency:2.462 GHz (Channel 11)
                    Quality:81/100  Signal level:-44 dBm  Noise level:-96 dBm
                    Encryption key:off
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s
                    Extra:bcn_int=100
                    Extra:atim=0
          Cell 02 - Address: 00:04:ED:0A:0A:FC
                    ESSID:"wlan-ap"
                    Protocol:IEEE 802.11g
                    Mode:Managed
                    Frequency:2.462 GHz (Channel 11)
                    Quality:56/100  Signal level:-60 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
                              9 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
          Cell 03 - Address: 00:40:F4:D2:A2:61
                    ESSID:"Dalton"
                    Protocol:IEEE 802.11g
                    Mode:Managed
                    Frequency:2.437 GHz (Channel 6)
                    Quality:7/100  Signal level:-91 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
                              9 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

root@mepis1:/home/mic#