For many years, I have been a proud owner and user of a Raspberry PI, and in particular, a Model 4.

I use it to run a bunch of Docker containers, one of which is the excellent PiHole that keeps the traffic within my network ad-free.

piHole

Recently, I wanted to change the WiFi network it was operating on and found, to my consternation, that the mouse had died.

How then, could I get the device to join a network?

The terminal to the rescue!

Run this command

sudo raspi-config

This will launch raspi-config, a utility to configure various options on the device.

RaspberryMenu1

Select 1, System Options.

RaspberryMenu2

Next, S1, Wireless LAN.

RaspberryMenu3

You can now key in the SSID and access key.

TLDR

The raspi-config tool allows you to configure various aspects of your Raspberry Pi.

Happy hacking!