user linux - nhmkdev/cardmaker GitHub Wiki
CardMaker in Linux
⚠️ This application is not well tested in Linux and likely has multiple limitations and potential issues.
If you plan to run CardMaker with a Linux based operating system you will need to install Mono. I have personally seen it run with Ubuntu and Debian (and even MacOS once).
Install Mono:
sudo apt-get install mono-complete
sudo apt-get install libcanberra-gtk-module
Then run mono CardMaker_Mono.exe to launch the application.