The Raspberry Pi Model 3B has built-in 802.11n wireless network card, which means you can connect to internet over wifi. For all other model, you may purchase a USB wifi dongle.
The wifi network is controlled by wpa_supplicant, edit the file with the following command:
- sudo nano /etc/wpa_supplicant/wpa_supplicant.conf
Enter the network detail as the following format at the end of the file:
- network={
- ssid=”<wifi SSID>”
- psk=”<wifi Password>”
- }
Note that the quotation marks are compulsory. Save and exit nano, then restart wireless service by the following command:
- sudo ifdown wlan0
- sudo ifup wlan0
You should be see the IP address on “ifconfig wlan0” under inet address. If not, check your SSID and password.