Linux CentOS 安装 .net core 3.1
打开终端，输入以下命令以添加 .NET Core Yum 仓库：
sudo rpm -Uvh
https://packages.microsoft.com/config/centos/7/packages-microsoft-prod.rpm
安装 .NET Core SDK：
sudo yum install dotnet-sdk-3.1
验证安装：
dotnet --version
reference:
https://www.oryoy.com/news/centos-7-qing-song-bu-shu-net-core-3-1-yi-jian-kai-qi-kua-ping-tai-ying-yong-zhi-lv-a15077861.html