Riot is an open, private and secure messenger application built with Matrix that allows you to chat, exchange files, make voice or video calls and conference. It also allows you to bridge other networks as well so you can use the Matrix ecosystems to talk in an IRC room as well.
To install Riot messenger on Kubuntu 20.04 open Konsole and type,
sudo apt install -y wget apt-transport-httpssudo wget -O /usr/share/keyrings/riot-im-archive-keyring.gpg https://packages.riot.im/debian/riot-im-archive-keyring.gpgecho "deb [signed-by=/usr/share/keyrings/riot-im-archive-keyring.gpg] https://packages.riot.im/debian/ default main" | sudo tee /etc/apt/sources.list.d/riot-im.listsudo apt updatesudo apt install riot-desktop
Pressing enter after each line is input. You may also have too authenticate with your password and answer some questions. After installation Riot can be found in the Application Menu under Applications/Internet or by selecting the menu and typing its name.
If you want to set up Riot to use the KDE server the instructions can be found here.