How to Install .NET Core on Ubuntu 20.04

The .NET Core is a free and open-source software framework designed with keeping Linux and macOS in mind. It is a cross-platform successor to .NET Framework available for Linux, macOS and Windows systems. .NET Core framework already provides scaffolding tools for bootstrapping projects.

This tutorial will give details about the installation of .NET Core SDK and .NET Core Runtime on Ubuntu 20.04 Linux system.

Step 1 – Enable Microsoft PPA

First of all, you need to enable Microsoft packages repository on your Ubuntu system. The Microsoft official team provides a Debian packages to create PPA file on your system.

Open a terminal on your Ubuntu system and configure Microsoft PPA by run the following commands:

wget https://packages.microsoft.com/config/ubuntu/20.04/packages-microsoft-prod.deb 
sudo dpkg -i packages-microsoft-prod.deb 

Step 2 – Installing .NET Core SDK

.NET Core SDK is the Software development kit used for developing applications. If you are going to create a application or making changes to existing application, you will required .net core sdk package on your system.

To install .NET Core SDK on Ubuntu 20.04 LTS system, execute the commands:

sudo apt update 
sudo apt install apt-transport-https 
sudo apt install dotnet-sdk-3.1 

To install the previous version of .Net Core SDK 2.1, type:

sudo apt install dotnet-sdk-2.1

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jQuery Ajax CRUD in ASP.NET Core MVC with Modal Popup

In this article, we’ll discuss how to use jQuery Ajax for ASP.NET Core MVC CRUD Operations using Bootstrap Modal. With jQuery Ajax, we can make HTTP request to controller action methods without reloading the entire page, like a single page application.

To demonstrate CRUD operations – insert, update, delete and retrieve, the project will be dealing with details of a normal bank transaction. GitHub repository for this demo project : https://bit.ly/33KTJAu.

Sub-topics discussed :

• Form design for insert and update operation.
• Display forms in modal popup dialog.
• Form post using jQuery Ajax.
• Implement MVC CRUD operations with jQuery Ajax.
• Loading spinner in .NET Core MVC.
• Prevent direct access to MVC action method.

Create ASP.NET Core MVC Project

In Visual Studio 2019, Go to File > New > Project (Ctrl + Shift + N).

From new project window, Select Asp.Net Core Web Application_._

Once you provide the project name and location. Select Web Application(Model-View-Controller) and uncheck HTTPS Configuration. Above steps will create a brand new ASP.NET Core MVC project.

Setup a Database

Let’s create a database for this application using Entity Framework Core. For that we’ve to install corresponding NuGet Packages. Right click on project from solution explorer, select Manage NuGet Packages_,_ From browse tab, install following 3 packages.

Now let’s define DB model class file – /Models/TransactionModel.cs.

public class TransactionModel
{
    [Key]
    public int TransactionId { get; set; }

    [Column(TypeName ="nvarchar(12)")]
    [DisplayName("Account Number")]
    [Required(ErrorMessage ="This Field is required.")]
    [MaxLength(12,ErrorMessage ="Maximum 12 characters only")]
    public string AccountNumber { get; set; }

    [Column(TypeName ="nvarchar(100)")]
    [DisplayName("Beneficiary Name")]
    [Required(ErrorMessage = "This Field is required.")]
    public string BeneficiaryName { get; set; }

    [Column(TypeName ="nvarchar(100)")]
    [DisplayName("Bank Name")]
    [Required(ErrorMessage = "This Field is required.")]
    public string BankName { get; set; }

    [Column(TypeName ="nvarchar(11)")]
    [DisplayName("SWIFT Code")]
    [Required(ErrorMessage = "This Field is required.")]
    [MaxLength(11)]
    public string SWIFTCode { get; set; }

    [DisplayName("Amount")]
    [Required(ErrorMessage = "This Field is required.")]
    public int Amount { get; set; }

    [DisplayFormat(DataFormatString = "{0:MM/dd/yyyy}")]
    public DateTime Date { get; set; }
}

C#Copy

Here we’ve defined model properties for the transaction with proper validation. Now let’s define  DbContextclass for EF Core.

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How to Install Microsoft Teams on Ubuntu 20.04

Microsoft Teams is a communication platform used for Chat, Calling, Meetings, and Collaboration. Generally, it is used by companies and individuals working on projects. However, Microsoft Teams is available for macOS, Windows, and Linux operating systems available now.

In this tutorial, we will show you how to install Microsoft Teams on Ubuntu 20.04 machine. By default, Microsoft Teams package is not available in the Ubuntu default repository. However we will show you 2 methods to install Teams by downloading the Debian package from their official website, or by adding the Microsoft repository.

Install Microsoft Teams on Ubuntu 20.04

1./ Install Microsoft Teams using Debian installer file

01- First, navigate to teams app downloads page and grab the Debian binary installer. You can simply obtain the URL and pull the binary using wget;

$ VERSION=1.3.00.5153
$ wget https://packages.microsoft.com/repos/ms-teams/pool/main/t/teams/teams_${VERSION}_amd64.deb

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How to Install PgAdmin 4 on Ubuntu 20.04

pgAdmin is the leading graphical Open Source management, development and administration tool for PostgreSQL. pgAdmin4 is a rewrite of the popular pgAdmin3 management tool for the PostgreSQL database.

In this tutorial, we are going to show you how to install pgAdmin4 in Server Mode as a web application using apache2 and Wsgi module on Ubuntu 20.04 LTS.

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Install VirtualBox in Ubuntu 21.04/20.04/18.04 › Servo Node

VirtualBox is a widely known and open-source tool offered by Oracle. It’s a cross platform virtualization application that can be installed on any system that allows users to run a number of guest operating systems on single machine over a virtual system.

Means, with the usage of VirtualBox on your system, you can easily install many operating systems and can run them simultaneously which can be helpful to develop, demonstrate, deploy and test applications on a single machine.

How to install VirtualBox On Ubuntu 18.04, 20.04 and 21.04?

Since the virtualization system offered by Oracle is available for cross platforms, even Ubuntu users can install the app and take its benefits. In order to install VirtualBox in Ubuntu variants, there’s a number of approaches that can be helpful.

Installing using default repository

sudo apt install virtualbox

Install using official DEB package

Visit the Virtualbox download page and download DEB package in your machine, and run the following command to install the package using ATP command.

sudo apt install ./virtualbox-6.1_6.1.22-144080_Ubuntu_bionic_amd64.deb

for more approaches and information, Read Here

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How to Install TeamViewer on Ubuntu 20.04

TeamViewer is a cross-platform, proprietary application that allows a user to remotely connect to a workstation, transfer files, and have online meetings. In this tutorial, we will walk you through how to install TeamViewer on Ubuntu 20.04 Desktop through the command line.

Prerequisites

Before continuing with this tutorial, make sure you are logged in as a user with sudo privileges.

Installing TeamViewer on Ubuntu

01- To install TeamViewer, first, download the TeamViewer .deb package. So, open the Terminal and run the following wget command.

$ wget https://download.teamviewer.com/download/linux/teamviewer_amd64.deb

02- Once you have downloaded the TeamViewer‘s Debian package, execute the following command to install Teamviewer:

$ sudo apt install ./teamviewer_amd64.deb

The system will prompt you with a [Y/n] option. Type ‘Y‘ and hit the enter key in order for to continue the installation.

03- Once the installation is done, you can launch TeamViewer either by typing the command teamviewer in your terminal or by clicking on the TeamViewer icon (Activities -> TeamViewer).

04- A pop-up License Agreement will be displayed. To proceed, click on the Accept License Agreement button.

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