PostgreSQL – Default Password/Resetting the Default Password
This post will explain how user accounts by default work in PostgreSQL, and how you can change the default password. PostgreSQL works a bit differently to other database servers like MySQL when it...
View ArticleHow to Start, Stop, and Restart PostgreSQL in Linux
This short tutorial will show you how to start, stop, and restart PostgreSQL servers on your Linux system. PostgreSQL is a flexible database system that allows you to run multiple versions of the...
View ArticleHow to Upgrade the Release of PostgreSQL (Ubuntu/Debian/Red Hat)
This article will show you how to safely upgrade the PostgreSQL database server to the latest version on your Linux system. First, Back Up Your Databases! Before making any changes to your system, you...
View ArticleHow to Update PostgreSQL on Linux (Ubuntu/Debian/Arch/RedHat)
This article will instruct you how to update the PostgreSQL database server on Linux – Redhat, Ubuntu, Debian, and Arch Linux. If you’re looking to install PostgreSQL server on your Linux system,...
View ArticleHow to Check that PostgreSQL Server is Running on Linux (Ubuntu/Debian/Red...
This tutorial will show you how to check that the PostgreSQL Server service is running on your Linux system. To install PostgreSQL follow our tutorial here. Checking PostgreSQL is Running on...
View ArticleTop 3 Best (FREE) GUIs for PostgreSQL in 2022
PostgreSQL is one of the most popular database systems in use today. GUIs make working with data in PostgreSQL simpler for beginners – here are the best free GUIs you can use on Linux in 2022. What is...
View ArticleHow to Use Variable Variables in PHP, with Examples
Variable variables let you dynamically access variables by their name. Sound confusing? This article will explain PHP variable variables, and provide code examples. What is a variable? In computer...
View ArticlePHP $this Variable – What It Is, How To Use It [Examples]
This article will explain the PHP $this variable – what it is, what it does, and how to use it – with code examples. PHP Objects and Classes PHP is an object-oriented programming language. Code and...
View ArticlePython Virtual Environments with virtualenv and Anaconda
This article will explain and demonstrate virtual environments in Python using virtualenv and in Anaconda. What is a ‘Virtual Environment’? In Python, a virtual environment is an isolated directory...
View ArticlePython NumPy Crash Course – A Simple Tutorial and Example
Python’s NumPy library is the standard for working with numerical data. This article will explain why that is, and how to use it. In addition to this, code examples for basic usage will be shown, and...
View ArticlePHP Scopes in Functions, Loops, Modules, With Examples
This article explains what variable scopes are, and how they work in the PHP programming language, with code examples. When programming in any language, you must be aware of how variables are scoped –...
View ArticleJavaScript Reference: Complete List of Operators + Examples
This article will explain and list JavaScript operators and expressions. JavaScript operators perform a given operation on the provided expressions or values. Common operations include comparisons,...
View ArticleHow to Include a JavaScript File in Another JavaScript File [Examples]
This article will detail the various methods for including a JavaScript file in another JavaScript file – providing several methods for use in the browser, and when working in Node.js. One of the...
View ArticleIs PostgreSQL an SQL or NoSQL Database?
A common question is whether PostgreSQL is an SQL or NoSQL database (it’s not) – this article explains why. What is SQL SQL (pronounced sequel or S-Q-L) is the Structured Query Language – a language...
View ArticleHow to Test Connection to PostgreSQL Database on Linux (Ubuntu/Debian/Fedora)
This short tutorial will demonstrate how to test the connection to a PostgreSQL database locally and remotely from Linux. This article is part of our series on getting started with PostgreSQL, head...
View ArticleSafely Using PHP Variable Variables with Arrays [Examples]
PHP variable variables are a powerful way to add flexibility to your code. This article explains the pitfalls and solutions to using them with arrays. Variable variables are a great way to simplify...
View ArticleHow to Check What Version of PostgreSQL You are Running on Linux
This article will show you how to check the version (or versions) of PostgreSQL running on your Linux system. As it is possible to install multiple versions of PostgreSQL on the same machine, there...
View ArticleHow to Declare Variables in PHP (Constants, Static, Global)
This article shows you how to declare variables in PHP, including constant, static, and global variables. Code examples are provided. What is a Variable? In computer programming, a variable stores a...
View ArticleThe Worst Things You’ll Probably Google As a Programmer on Linux
Programming terminology isn’t always well thought out. Language changes, or the people building out languages don’t consider the full implications of what a function or program or program name may...
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How to Share a Printer using AirPrint with a Raspberry Pi
This tutorial will show you how to share your USB printer with iPhones and iPads using AirPrint from a Raspberry Pi. AirPrint is Apple’s printer sharing technology and is required to print from iOS...
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