<亲测>centos安装 .net core 2.1

https://www.microsoft.com/net/learn/get-started-with-dotnet-tutorial#install 

.NET Tutorial - Hello World in 10 minutes

Not ready to install anything? Try our in-browser tutorial.

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Tutorial Guide

WindowsLinuxmacOS

• Install the .NET SDK
• Create your app
• Run your app
• Get an editor
• Keep learning

Try .NET in your browser

1. Install the .NET SDK

   To start building .NET apps you just need to download and install the .NET SDK (Software Development Kit).

   Linux Distribution

                     RHEL                   Ubuntu 18.04                   Ubuntu 17.10                   Ubuntu 16.04                   Ubuntu 14.04                   Debian 9                   Debian 8                   Fedora 28                   Fedora 27                   CentOS / Oracle                   openSUSE                   SLES      

   Add the dotnet product feed

   Before installing .NET, you'll need to register the Microsoft key, register the product repository, and install required dependencies. This only needs to be done once per machine.

   Open a command prompt and run the following commands:

   sudo rpm -Uvh https://packages.microsoft.com/config/rhel/7/packages-microsoft-prod.rpm
   

   Install the .NET SDK

   Update the products available for installation, then install the .NET SDK.

   In your command prompt, run the following commands:

   sudo yum update
   sudo yum install dotnet-sdk-2.1
   

2. Create your app

   Open a new command prompt and run the following commands:

   dotnet new console -o myApp
   cd myApp

   The dotnet command creates a new application of type console for you. The -o parameter creates a directory named myAppwhere your app is stored, and populates it with the required files. The cd myApp command puts you into the newly created app directory.

   The main file in the myApp folder is Program.cs. By default, it already contains the necessary code to write "Hello World!" to the Console.

   using System;
   
   namespace myApp
   {
       class Program
       {
           static void Main(string[] args)
           {
               Console.WriteLine("Hello World!");
           }
       }
   }

3. Run your app

   In your command prompt, run the following command:

   dotnet run

   Congratulations, you've built and run your first .NET app!

4. Get an editor

   Visual Studio Code is a free, cross-platform code editor with support for .NET.

   Download Visual Studio Code

   For full language support including smart code completion and debugging, get the C# extension for Visual Studio Code.

   Download the C# Extension

5. Keep learning

   Now that you've got the basics, you can keep learning with the .NET Quick Starts. In the first Quick Start you'll learn about collections.

   Quick start: Collections