To connect to Wifi [Using terminal]

This guide is to connect ONLY to WPA/WPA2 wifi networks. This guide will show you how to connect to the Wifi on a Raspberry Pi 3. This is for people who already has an OS installed on their Raspberry Pi and don't have a mouse to navigate through and click on the wifi icon OR anyone who wants to learn to connect using the terminals.

STEP 1 - SETTING IT UP

• Insert your SD card with the OS in it.
• Power up your Raspberry Pi 3 using a Micro USB charger.
• Connect your keyboard.
• Connect your screen to see whats happening.
• Open terminals by pressing CTRL + ALT + T.

STEP 2 - TERMINAL COMMANDS

• Navigate to the etc folder

cd /etc/

• In this folder there will be another folder named, wpa_supplicant, open the folder.

cd wpa_supplicant

• Here you have to edit the file named wpa_supplicant.conf
• To do so, we use terminals nano text editor.
• We have to be a Super User to make changes to this file, hence we have to use sudo

sudo nano wpa_supplicant.conf

• If you have connected your Raspberry Pi 3 to Wifi before you will see:

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
country=GB

network={
        ssid="wifi-1-ssid"
        psk="wifi-1-password"
        key_mgmt=wifi-password-security-type
}

network={
        ssid="wifi-2-ssid"
        psk="wifi-2-password"
        key_mgmt=wifi-password-security-type
}

• If not, you wont see the network={...}
• What we have to understand is that network={...} is EACH network that we connected to in the past.
• Now, We have to add our own network={...}, We can do that by adding this to the end of the file:

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
country=GB

network={
        ssid="wifi-1-ssid"
        psk="wifi-1-password"
        key_mgmt=wifi-password-security-type
}

network={
        ssid="wifi-2-ssid"
        psk="wifi-2-password"
        key_mgmt=wifi-password-security-type
}

#Add it here.. 
network={
        ssid="new-wifi-2-ssid"
        psk="new-wifi-2-password"
        key_mgmt=new-wifi-password-security-type
}

• "new-wifi-2-ssid" will be your Wifi name which you want to connect to.
• "new-wifi-2-password" will be your Wifi password of the wifi you want to connect to.
• wifi-password-security-type will be the security type: WPA/WPA2
• Now we have to reconfigure, We can do that by

sudo wpa_cli reconfigure

• This should connect you to the Wifi network, now you can use SSH to use your Raspberry Pi 3.