Issue the following commands to create a new directory where we will create the ASP.NET 5 application. The first command ( mkdir - make directory) is for creating a directory in Linux and the second command ( cd - change directory) is for going inside the folder. And the last command is the command line to create a .NET Core application:

mkdir aspnetcoreapp
cd aspnetcoreapp
dotnet new

The following screen will be displayed:

This will create the .NET Core application, which has a couple of files—Program.cs and project.json. It's a bare minimum application that does not have even Startup file.

We need to add the Kestrel HTTP Server package as a dependency in project.json. You can edit the file by issuing the command vi project.json . By default, the vi editor will open the file in read-only mode. You need to press Esc + I in order to make it to the edit mode. Add the line "Microsoft.AspNetCore.Server.Kestrel": "1.0.0" as shown in the following screenshot:

Press the Escape key and ":"  and type wq to write into and quit the vi editor.

As we have added the dependency, we need to restore the packages by executing the following command:

dotnet restore

Once you enter this command, all the packages will be restored as shown in the following screenshot:

Create a new file, Startup.cs, with the following content. You can create a new file by issuing the command vi Startup.cs . As usual, we need to press Esc + I to make the file in write and read mode. Paste the following content (you can paste it by right-clicking on the mouse after copying it from here):

using System;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
namespace aspnetcoreapp
{
  public class Startup
  {
    public void Configure(IApplicationBuilder app)
    {
      app.Run(context =>
        {
          return context.Response.WriteAsync("This is ASP.NET Core application running in Linux!");
         });
    }
  }
}

Press Esc + :  and type wq, to save the file. Update the Program.cs file with the following content:

namespace aspnetcoreapp
{
  public class Program
  {
    public static void Main(string[] args)
    {
      var host = new WebHostBuilder()
      .UseKestrel()
      .UseStartup<Startup>()
      .Build();
       host.Run();
     }
   }
}

You'll see the following screen:

We have created the ASP.NET Core web application. Now we need to install Nginx, a reverse proxy server, which enables you to offload work such as serving static content, caching, and compressing requests. You can configure Nginx to listen on a particular port (we'll discuss the details later in this chapter). You can install Nginx by issuing the following command:

sudo apt-get install nginx

Once it is installed, you can issue the following command to start the service:

sudo service nginx start

When you'll run the command, you'll see the following screen: