Run the following commands to install mono sudo apt update sudo apt install dirmngr gnupg apt-transport-https ca-certificates software-properties-common sudo apt-key adv –keyserver hkp://keyserver.ubuntu.com:80 –recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF sudo apt-add-repository ‘deb https://download.mono-project.com/repo/ubuntu stable-focal main’ sudo apt install mono-complete Progress will look like this Confirm if the package is installed by running the following command: apt -qq list mono-complete … Continue reading Install mono on UbuntuMore