How to install Signal on the Linux Mint 20.1 or Ubuntu

After the WhatsApp privacy changes, many folks have installed the Signal app on their Android devices. Signal also has a desktop client, where Signal can be installed and used on a computer. To install the Linux version, open a terminal window and enter the following commands:

Set up the repository
$ wget -O- https://updates.signal.org/desktop/apt/keys.asc | sudo apt-key add - <enter>
$ echo "deb [arch=amd64] https://updates.signal.org/desktop/apt xenial main" | sudo tee -a /etc/apt/sources.list.d/signal-xenial.list <enter>

Install signal on the Linux desktop
$ sudo apt-get update <enter>
$ sudo apt-get install signal-desktop <enter>