巨硬官网 - https://dotnet.microsoft.com/zh-cn/download/dotnet
    环境很简单，根据需要选择版本；SDK 很大，如果不需要在 Linux 上开发，只需要安装运行时即可

    1. rpm -Uvh https://packages.microsoft.com/config/rhel/7/packages-microsoft-prod.rpm
    2. yum update
    3. yum -y install dotnet-runtime-3.1
    4. yum -y install dotnet-sdk-3.1
    5. yum -y install aspnetcore-runtime-3.1

    注意：aspnetcore 和 dotnet 是两个东西
    /usr/share/dotnet/shared/Microsoft.NETCore.App/3.1.23

    1. dotnet --info
    2.   It was not possible to find any installed .NET Core SDKs
    3.   Did you mean to run .NET Core SDK commands? Install a .NET Core SDK from:
    4.       https://aka.ms/dotnet-download
    6. Host (useful for support):
    7.   Version: 3.1.23
    8.   Commit:  7af614fde0
    10. .NET Core SDKs installed:
    11.   No SDKs were found.
    13. .NET Core runtimes installed:
    14.   Microsoft.NETCore.App 3.1.23 [/usr/share/dotnet/shared/Microsoft.NETCore.App]
    16. To install additional .NET Core runtimes or SDKs:
    17.   https://aka.ms/dotnet-download

    .NET 监听所有 IP

    1. dotnet ./publish/Scigo.Utils.HttpApi.dll  --urls=http://*:5000