參考微軟官方知識庫

添加存儲庫

sudo add-apt-repository ppa:dotnet/backports

安裝 SDK

sudo apt-get update && sudo apt-get install -y dotnet-sdk-9.0

安裝運行時

安裝ASP.NET Core 運行時

sudo apt-get update && sudo apt-get install -y aspnetcore-runtime-9.0

或者

安裝不包含 ASP.NET Core 支持的 .NET 運行時

sudo apt-get update && sudo apt-get install -y dotnet-runtime-9.0

編個程序測試下

dotnet new console -o SocketServer

Welcome to .NET 9.0!
---------------------
SDK Version: 9.0.107

----------------
Installed an ASP.NET Core HTTPS development certificate.
To trust the certificate, run 'dotnet dev-certs https --trust'
Learn about HTTPS: https://aka.ms/dotnet-https

----------------
Write your first app: https://aka.ms/dotnet-hello-world
Find out what's new: https://aka.ms/dotnet-whats-new
Explore documentation: https://aka.ms/dotnet-docs
Report issues and find source on GitHub: https://github.com/dotnet/core
Use 'dotnet --help' to see available commands or visit: https://aka.ms/dotnet-cli
--------------------------------------------------------------------------------------
The template "Console App" was created successfully.

Processing post-creation actions...
Restoring /home/siit/donetscript/SocketServer/SocketServer.csproj:
Restore succeeded.

反饋信息里給出了一大溜學習資源，這個培養用戶的手法是真不錯。
繼續繼續，CD進路徑。

cd SocketServer

使用Nano打開Program.cs,并寫入以下代碼。

using System;
using System.Net;
using System.Net.Sockets;
using System.Text;

class Program
{
    static void Main()
    {
        int port = 11000;

        IPEndPoint localEndPoint = new IPEndPoint(IPAddress.Any, port);

        using (Socket listener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp))
        {
            listener.Bind(localEndPoint);
            listener.Listen(10);

            Console.WriteLine($"Server is running on port {port}. Accepting connections...");

            while (true)
            {
                Console.WriteLine("Waiting for a client to connect...");
                using (Socket handler = listener.Accept())
                {
                    Console.WriteLine("Client connected. Ready to receive messages:");

                    byte[] buffer = new byte[1024];

                    while (true)
                    {
                        int received = handler.Receive(buffer);
                        if (received == 0)
                        {
                            Console.WriteLine("Client disconnected.");
                            break;
                        }

                        string message = Encoding.ASCII.GetString(buffer, 0, received);
                        Console.WriteLine("Received: " + message);

                        string reply = $"Echo: {message}<EOF>";
                        byte[] replyBytes = Encoding.ASCII.GetBytes(reply);
                        handler.Send(replyBytes);
                    }
                }
            }
        }
    }
}

然后運行一下

dotnet run

看到反饋：

SocketServer$ dotnet run
Server is running on port 11000. Accepting connections...
Waiting for a client to connect...

然后通過另一臺電腦，使用NetAssist去連接這臺服務器。套接字通信和NetAssist下載看這篇

可以在服務器端看到

Client connected. Ready to receive messages:

客戶端發送Hello，可以看到服務器的Echo。

同時在服務器終端可以看到

Received: Hello

下一步就準備把這段套接字通信的內容和視覺部分程序結合起來，就可以實現外部設備比如機器人或者PLC等觸發視覺拍照獲取坐標信息等內容的交互了。