Linux

How to manually configure your WiFi on Arch Linux?

Published on June 9th, 2020


Recently, I thought of playing around with Arch Linux to learn more about Linux under-the-hood and to see if it can become my new daily driver.

As I booted from live USB, I tried connecting to my WiFi using wifi-menu but it never worked after selecting my network name and entering the credentials.

So, I did a little bit of research in ArchWiki and forums and I figured a way to set it up manually using netctl by myself.

netctl is a network profile manager and it's apparently an Arch Linux project.

1. Select your interface

Before you begin to set up your WiFi connection from your computer, check if your network interface is being detected:


iwconfig

Since it's a WiFi connection, your interface most probably must be wlan0. If you see it, then set the interface up:


ip link set wlan0 up

2. Scan for networks

Now, that your interface, use it to scan for your WiFi network:


iwlist wlan0 scan | less

Once, you execute this command, you must be able to see your WiFi's SSID (or network name).

Now, put your interface down for a while:


ip link set wlan0 down

3. Create a network profile

Alright, go to /etc/netctl/examples/ directory and make a copy of the wireless-wpa file to the /etc/netctl directory:


cd /etc/netctl/examples
cp /etc/netctl/examples/wireless-wpa /etc/netctl/your-wifi-name

Now, go back to /etc/netctl/ directory and open the your-wifi-name file with your preferred text editor and edit the following only:


ESSID: your-wifi-name
key: your-wifi-password

After you're done editing, save the file.

4. Test network profile

To test if your profile is working, do the following:


netctl start your-wifi-name
ping -c 3 www.google.com

In case, you get an error, try doing this:


ip link set dev wlan0 down
netctl start your-wifi-name
ping -c 3 www.google.com

If you're able to ping, then it works. Else, edit your network profile and try connecting to it again.

5. Enable network profile

If you've reached this stage that means your network profile must be working fine. Just do the following to enable the network profile to run the internet throughout the setup:


netctl enable your-wifi-name

Try reading more about using netctl in Arch Linux's official wikipage.