安装环境：在Vmware15下安装了 银河麒麟 4.0.2桌面版。

Install the .NET Core SDK

Update the products available for installation, then install the .NET Core SDK. In your terminal, run the following commands.

sudo apt-get update
sudo apt-get install apt-transport-https
sudo apt-get update
sudo apt-get install dotnet-sdk-3.1  

主要是最后一句。