Find Network Interface Card

ls /sys/class/net

cd /sys/class/net/[wifi interface]/wireless/

Release network connections

sudo ip link set dev [wifi interface] down
sudo dhclient -r [wifi interface]
sudo ip link set dev [wifi interface] up

Scan

sudo iwlist [wifi interface] scan

wlan0 Scan completed :
Cell 01 - Address: 00:04:E2:D0:D1:96
ESSID:"SMC"
Mode:Master
Channel:6
Frequency:2.437 GHz
Quality=78/100 Signal level=-56 dBm Noise level=-127 dBm
Encryption key:off
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:tsf=00000039cdb32ac3

Setup Network Interface Card

sudo iwconfig [wifi interface] ap [whatever you found for the MAC address]
sudo iwconfig [wifi interface] essid [whatever you found for essid]
sudo iwconfig [wifi interface] freq [whatever you found for frequency]G

Note the "G" after the frequency, to denote "GHz".

Acuire Network Address

sudo dhclient [wifi interface]

Compatible Chipsets

lspci