Install Mono on Ubuntu

install-mono.sh

wget http://download.mono-project.com/repo/xamarin.gpg
sudo apt-key add xamarin.gpg
echo "deb http://download.mono-project.com/repo/debian wheezy main" | sudo tee --append /etc/apt/sources.list.d/mono-xamarin.list
sudo apt-get update
sudo apt-get install mono-complete

sudo certmgr -ssl -m https://go.microsoft.com
sudo certmgr -ssl -m https://nugetgallery.blob.core.windows.net
sudo certmgr -ssl -m https://nuget.org
mozroots --import --sync