In this article, we are going to configure basic network connectivity using wpa_supplicant.
Prerequisites
Besides having a terminal open, we need to remember a few concepts:
- Check whether
wpa_supplicantis installed or not. - You should know the SSID and password.
- Remember that you have to run your program as a root user.
How to do it
Create a script called wifi_conn.sh and write the following code in it:
#!/bin/bash
ifdown wlan0
rm /etc/network/interfaces
touch /etc/network/interfaces
echo 'auto lo' >> /etc/network/interfaces
echo 'iface lo inet loopback' >> /etc/network/interfaces
echo 'iface eth0 inet dhcp' >> /etc/network/interfaces
echo 'allow-hotplug wlan0' >> /etc/network/interfaces
echo 'iface wlan0 inet manual' >> /etc/network/interfaces
echo 'wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf' >> /etc/network/interfaces
echo 'iface default inet dhcp' >> /etc/network/interfaces
rm /etc/wpa_supplicant/wpa_supplicant.conf
touch /etc/wpa_supplicant/wpa_supplicant.conf
echo 'ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev' >> /etc/wpa_supplicant/wpa_supplicant.conf
echo 'update_config=1' >> /etc/wpa_supplicant/wpa_supplicant.conf
wpa_passphrase $1 $2 >> /etc/wpa_supplicant/wpa_supplicant.conf
ifup wlan0How it works
Execute the script using sudo:
sudo bash wifi_conn.sh <SSID> <password>
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