As you may know, Flatpak is a software deployment tool that aims to ease software distribution and use in Linux. It is mainly developed to contain applications in a secure virtual sandbox allowing for using applications without the need of root privileges and without compromising on the systems security. Since the Flatpak apps are contained inside the sandbox environment, they have to request permissions to access other parts of the operating system, hardware devices (like bluetooth, network etc.) and sockets (like pulseaudio, ssh-auth, cups etc.). This guide teaches how we can easily configure flatpak apps permissions with Flatseal in Linux.