Eddie on Ubuntu 17, first install attempt did not complete sucessfully, due to other packages not being installed first.
I did not keep track of what order I tried what commands, unfortunately.
before the reboot, I did however, after searching on the forms, do this:
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
echo "deb http://download.mono-project.com/repo/debian wheezy main" | sudo tee /etc/apt/sources.list.d/mono-xamarin.list
sudo apt-get update
sudo apt-get install mono-complete
After these otehr steps,, a reboot was required. After reboot, I tried again, and am prompted for root password, but then nothing else happens in terminal window.
rebooted, tried again, no change.
Thanks for any assistance