How to install Riot desktop (Matrix client) on Debian-based systems
Tested on Debian Mint edition, but this should work for Ubuntu too.
These instructions assume you are willing and able to use the command line— that is, open a terminal and type these lines of commands. Unlike the the official desktop install information, these instructions don't assume you already know and remember how to add a new remote source to your package manager and install from it.
First off, don't trust keys and sources given by random sites like this one. Confirm that each comes from the Riot web site's own desktop installation instructions.
sudo apt-key add repo-key.asc
sudo vi /etc/apt/sources.list.d/matrix-riot.list
And add (press
i to enter insert mode):
# Riot (Matrix client)
deb https://riot.im/packages/debian/ jessie main
deb-src https://riot.im/packages/debian/ jessie main
Exit (write and quit) vim (Esc :wq), and then:
sudo apt-get update
sudo apt-get install riot-web
Now you should be able to open Riot by typing its name in your favorite launcher.
Your good to connect Riot to the default server available to all users. To set up your own Matrix server: