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將項目部署到ubuntu上面以后，運(yùn)行，竟然報錯：

ubuntu@VM-4-11-ubuntu:~/publish$ uname -a
Linux VM-4-11-ubuntu 5.4.0-121-generic #137-Ubuntu SMP Wed Jun 15 13:33:07 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
ubuntu@VM-4-11-ubuntu:~/publish$ 

ubuntu@VM-4-11-ubuntu:~/publish$ ./qhxyhs

==================西寧威勢電子提供此程序==================

8/27/2022 7:07:25 PM:   數(shù)據(jù)庫初始化專題數(shù)量1條
8/27/2022 7:07:26 PM:   數(shù)據(jù)庫初始化頻道數(shù)量5條
8/27/2022 7:07:26 PM:   數(shù)據(jù)庫初始化系統(tǒng)權(quán)限模塊數(shù)量47條
8/27/2022 7:07:26 PM:   數(shù)據(jù)庫初始化系統(tǒng)用戶數(shù)量3條
8/27/2022 7:07:26 PM:   數(shù)據(jù)庫初始化用戶角色數(shù)量3條
8/27/2022 7:07:26 PM:   數(shù)據(jù)庫初始化API商家演示接口數(shù)量5條
8/27/2022 7:07:26 PM:   數(shù)據(jù)庫初始化頻道單頁面數(shù)量3條
8/27/2022 7:07:26 PM:   數(shù)據(jù)庫初始化頻道新聞頁面5條
8/27/2022 7:07:26 PM:   數(shù)據(jù)庫初始化完成.

Unhandled exception. System.Net.Sockets.SocketException (13): Permission denied
   at System.Net.Sockets.Socket.UpdateStatusAfterSocketErrorAndThrowException(SocketError , String )
   at System.Net.Sockets.Socket.DoBind(EndPoint , SocketAddress )
   at System.Net.Sockets.Socket.Bind(EndPoint )
   at Microsoft.AspNetCore.Server.Kestrel.Transport.Sockets.SocketTransportOptions.CreateDefaultBoundListenSocket(EndPoint endpoint)
   at Microsoft.AspNetCore.Server.Kestrel.Transport.Sockets.SocketConnectionListener.Bind()
   at Microsoft.AspNetCore.Server.Kestrel.Transport.Sockets.SocketTransportFactory.BindAsync(EndPoint endpoint, CancellationToken cancellationToken)
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Infrastructure.TransportManager.BindAsync(EndPoint endPoint, ConnectionDelegate connectionDelegate, EndpointConfig endpointConfig, CancellationToken cancellationToken)
   at Microsoft.AspNetCore.Server.Kestrel.Core.KestrelServerImpl.<>c__DisplayClass30_0`1.<<StartAsync>g__OnBind|0>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.AddressBinder.BindEndpointAsync(ListenOptions endpoint, AddressBindContext context, CancellationToken cancellationToken)
   at Microsoft.AspNetCore.Server.Kestrel.Core.ListenOptions.BindAsync(AddressBindContext context, CancellationToken cancellationToken)
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.AddressBinder.AddressesStrategy.BindAsync(AddressBindContext context, CancellationToken cancellationToken)
   at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.AddressBinder.BindAsync(IEnumerable`1 listenOptions, AddressBindContext context, CancellationToken cancellationToken)
   at Microsoft.AspNetCore.Server.Kestrel.Core.KestrelServerImpl.BindAsync(CancellationToken cancellationToken)
   at Microsoft.AspNetCore.Server.Kestrel.Core.KestrelServerImpl.StartAsync[TContext](IHttpApplication`1 application, CancellationToken cancellationToken)
   at Microsoft.AspNetCore.Hosting.GenericWebHostService.StartAsync(CancellationToken cancellationToken)
   at Microsoft.Extensions.Hosting.Internal.Host.StartAsync(CancellationToken )
   at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.RunAsync(IHost , CancellationToken )
   at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.RunAsync(IHost , CancellationToken )
   at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.Run(IHost )
   at WinsMVC.Program.Main(String[] args) in X:\WEB\Program.cs:line 41
Aborted (core dumped)

看提示，應(yīng)該是權(quán)限拒絕引起的。在lunchSetting.json中有如下定義：

"applicationUrl": "https://www.xxx.com;http://www.xxx.com;",  

奇怪的是，將https協(xié)議剔除以后再次部署運(yùn)行，程序又可以正常啟動，但是端口被綁定到5000上面去了。于是在startup.cs中強(qiáng)行綁定端口試試：

webBuilder.UseKestrel() .UseUrls($"http://"+System.Net.IPAddress.Any+":80") .UseStartup<Startup>();

但是還是報同樣的錯。后來經(jīng)過一凡查閱資料與測試，發(fā)現(xiàn)綁定低端端口的時候就會報錯，將端口改為3389后再運(yùn)行，發(fā)現(xiàn)代碼又可以正常運(yùn)行了，高端口（ >1024）沒有問題?？磥泶_實是權(quán)限原因引起的,如果是root權(quán)限，應(yīng)該是沒問題的，條件不成熟，沒有測試。

這些是查閱到的資料

PROBLEM: Rancher reported "unable to start kestrel" and Access Denied
REASON: This happen because port 80 is low port and need adminstrator permissions
SOLUTION: Use port 8080