sudo apt install mono-complete
# mono -V
mkdir -p ~/WorkingRam/net123
cd ~/WorkingRam/net123
wget http://www.nat123.com/down/nat123linux.tar.gz
tar -zxvf nat123linux.tar.gz
mono nat123linux.sh
# >> wenliang999
cd ~/WorkingRam/net123;mono nat123linux.sh service &