SQL Foreign Key

A foreign key is one or more columns in a child table that refers to a primary key of a parent table. The link between both tables is the foreign key.

Boyce–Codd, Fourth and Fifth Normal Forms

The 5NF issue comes up when a given supplier can supply a given product to more than one customer. The Five Normal Forms are discussed in this article.

Development Release: AlmaLinux OS 8.7 Beta

AlmaLinux OS is a clone of Red Hat Enterprise Linux which uses the same source code and provides binary compatibility. The project has published a new development snapshot, AlmaLinux OS 8.7 Beta. “The AlmaLinux 8.7 Beta provides a more stable foundati…

Atlas Auth Commands

Atlas Auth commands perform authentication to the development machines and restrict other addresses outside your network from accessing your cluster.

KDE Plasma 5.26.2 Disables Animated Wallpaper Due to Severe Memory Leak

KDE Plasma 5.26.2 is here a week after KDE Plasma 5.26’s first point release to address more bugs and critical security issues, including a severe memory leak when using the xcb_glx integration for the new animated wallpaper feature on X11. As such, the animated wallpaper feature has been disabled on X11, for now. Learn more […]

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SMTP Commands: Essential SMTP Commands and Response Codes

A guide on the essential SMTP commands and response codes with their functions and how to apply these commands and codes in SMTP sessions.

Ubuntu 22.10 Gets First Kernel Security Update for Recent Vulnerabilities

This first kernel security update for Ubuntu 22.10 patches the recently discovered Wi-Fi Stack security vulnerabilities that Canonical already patched in its other supported Ubuntu releases last week, namely Ubuntu 22.04 LTS, Ubuntu 20.04 LTS, and Ubun…

NumPy Zip

The NumPy zip() function is used to zip the variables together in an object or container. This function works with multiple iterable objects or containers.

NumPy Subtract

This guide is about the NumPy subtract() method, how it works, and when it is used. We also covered the syntax, and parameters of the subtract() function.

Numpy Replace Method

In this guide, we learned about the numpy.char.replace function of python’s NumPy. We explained what the purpose of the replace function is.

Numpy Logical_AND

This article have discussed how easily we can perform logical operations on our arrays with the help of the np.logical_and() function of numPy.

Numpy Linalg Norm

This tutorial was created to review Numpy linalg norm. We have provided details about the Python function numpy.linalg.norm() to find a matrix or vector norm.

Numpy Inverse Matrix

We have discussed how we can take the inverse of complex matrices with the help of the linalg module of NumPy by using simple to complex examples.

Java Substring

The java substring is a part of the java main string. As the java strings are immutable, the initial string is left unchanged.

How to Set Up an SMTP Server on Windows

A guide on how to set up a Simple Mail Transfer Protocol or SMTP server on Windows 7, 10, and other versions to meet the SMTP server capabilities by default.

Debian Package Managers: dpkg, apt and Aptitude Explained

This tutorial explains how to install, remove, search and list packages using dpkg, apt and aptitude Debian Linux package managers.

How to Install Bitcoin Core in Ubuntu 22.04

Tutorial on how to install the Bitcoin Core in Ubuntu 22.04, what Bitcoins are, and how you can use the Bitcoin Core to create and manage your Bitcoin wallet.

Arch Linux Docker Tutorial

A guide on how to get started with Docker on Arch Linux by installing Docker, starting the Daemon, adding a user to the Docker group, and various commands used.

13 Independent Linux Distros that Are Built from Scratch

Unique and independent Linux distros that are totally built from scratch. Sounds interesting? Check out the list here.
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How to Install Discourse with Docker on Ubuntu 22.04

Discourse is a free and open-source discussion platform. In this tutorial, we will show you how to install Discourse Forum on Ubuntu 22.04.
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