KVIrc is a free and open source IRC client application for Linux, Windows and MacOS. It is released under GNU General Public License v2.0. It comes with Proxy, IPv6 and SSL support, multi-server connection, built-in scripting language interpreter, micryption, Themes support, Standard DCC CHAT and SEND support and more.
Install KVIrc on Ubuntu Linux
You can install KVIrc IRC app via flatpak from the remote flathub repository. First you need to install flatpak and flathub on your system and restart it.
How to Install Flatpak and Flathub
After that in the terminal application (ctrl+alt+t) run this flatpak KVIrc install command.
This command will install the latest KVIrc IRC app on your system.
flatpak install flathub net.kvirc.KVIrc
After the installation you can run below command to open KVIrc app.
flatpak run net.kvirc.KVIrc
And also uninstall KVIrc using
sudo flatpak uninstall net.kvirc.KVIrc