Flathub install command line install on Ubuntu 2023

Install Flathub on Ubuntu 2023.
Flathub Link: flathub.org
About Flathub.
Flathub is a valuable resource for Linux users, simplifying the installation and management of applications on different Linux distributions. Its cross-distribution support, ease of use, and commitment to security make it an essential part of the Linux software ecosystem. Whether you are a seasoned Linux user or new to the platform, Flathub offers a convenient and reliable way to access a vast library of software for your Linux system.