programming

radiolist-widget

How to use ncurses widgets in shell scripts on Linux

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In this tutorial we will learn the basics of the dialog utility, in order to use ncurses widget in our shell scripts. We will see how to install dialog in the most used Linux distributions, some of the common options we can use to alter the behavior of dialog, how to use some widgets; among the others: inputbox, checklist, radiolist and yesno. Finally, we will see how to use the data obtained by the widget processing.

In this tutorial you will learn:

  • How to install the dialog utility on Linux
  • What are the most relevant dialog options
  • How to use the inputbox, checklist, radiolist, passwordbox, msbox, calendar and yesno widgets
  • How to manage data derived from the widget processing

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Check Java Version

Check Java Version

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There are several ways on how to check what version of Java is installed on your system. Most likely the simplest way is to directly use the java binary in combination with the -version option. To do so run java -version on your terminal.

$ java -version

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How to create a selection menu using the select statement in Bash shell

How to create a selection menu using the select statement in Bash shell

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We all very often use bash scripts to automatize boring and repetitive tasks. Sometimes in our scripts we need to ask
the user to perform one or more choices interactively: in this tutorial we will see how to use the Bash shell select statement to perform such operation in very few lines of code.

In this tutorial you will learn:

  • How to use the Bash select statement
  • How to customize the select menu prompt

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How to extend the GNOME Nautilus file manager with custom scripts

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Although GNOME, in its 3.x iteration has been the object of many debates, due to its non-traditional desktop paradigm, it is probably the most used desktop on Linux. The default file manager included in GNOME is Nautilus (the application new name is “Files”). In this tutorial we will see how we can extend the file manager with functionalities provided by custom scripts.

In this tutorial you will learn:

  • How to use custom scripts to extend Nautilus functionalities

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How to create and manipulate tar archives using Python

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On Linux and other Unix-like operating systems, tar is undoubtedly one of the most used archiving utilities; it let us create archives, often called “tarballs”, we can use for source code distribution or backup purposes. In this tutorial we will see how to read, create and modify tar archives with python, using the tarfile module.

In this tutorial you will learn:

  • The modes in which a tar archive can be opened using the tarfile module
  • What are the TarInfo and TarFile classes and what they represent
  • How to list the content of a tar archive
  • How to extract the content of a tar archive
  • How to add files to a tar archive

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How to persist data to PostgreSQL in Java

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Java is perhaps the most widely used programming language nowadays. It’s robustness and platform-independent nature enables Java based applications to run on mostly anything. As is the case with any application, we need to store our data in some sort of reliable way – this need called databases to life.

In Java database connections are implemented by JDBC (Java Database Connectivity API), that let’s the programmer handle different kind of databases in almost the same way, which makes our lives much easier when we need to save or read data from a database.

In this tutorial we will create an example Java application that will be able to connect to a PostgreSQL database instance, and write data into it. To check that our data insertion is successful, we’ll also implement reading back and print the table we inserted data into.

In this tutorial you will learn:

  • How to setup the database for the application
  • How to import PostgreSQL JDBC Driver into your project
  • How to insert data into the database
  • How to run a simple query to read a database table’s content
  • How to print fetched data

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How to install Firefox Developer Edition on Linux

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The “developer edition” is a special version of the Mozilla Firefox web browser tailored for web developers. It has features stabilized in nightly builds, provides experimental developer tools, and it is configured for development, so some options as remote debugging, are enabled by default.

The browser creates and uses a separate profile, so it can be used together with the standard edition of Firefox (on Linux, profiles are created inside the ~/.mozilla directory).

In this tutorial we will see how to install Firefox Developer Edition on Linux, how to add the application to our PATH, and how to create a desktop launcher for it: the instructions can be applied to any Linux distribution.

In this tutorial you will learn:

  • How to download and install Firefox developer edition
  • How to add the Firefox binary to PATH
  • How to create a launcher for the application

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IntelliJ IDEA 3D creation suite on Ubuntu 20.04 Focal Fossa

How to install IntelliJ IDEA on Ubuntu 20.04 Linux Desktop

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In this tutorial we will be installing the IntelliJ IDEA on Ubuntu 20.04 Focal Fossa Desktop.

WHAT IS INTELLIJ IDEA?
IntelliJ IDEA is an integrated development environment written in Java for developing computer software. It is developed by JetBrains, and is available as an Apache 2 Licensed community edition, and in a proprietary commercial edition. Both can be used for commercial development.. Reference: https://en.wikipedia.org/wiki/IntelliJ_IDEA

In this tutorial you will learn:

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