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Change the keyboard layout on Ubuntu Server
Use dpkg-reconfigure to change the keyboard layout of an Ubuntu Server console. An SSH session normally uses the client computer’s...
Mitsubishi robot solved a Rubik’s Cube in 0.305 seconds...
In May 2024, Mitsubishi Electric’s TOKUFASTbot solved a puzzle cube in 0.305 seconds, beating the previous 0.38-second record.
A simple blockchain implementation in PHP
An introductory PHP example that creates blocks, calculates hashes and checks the integrity of a local chain.
Disable the floppy device /dev/fd0 on Linux
If an unused floppy controller produces /dev/fd0 errors, prevent automatic loading of its kernel module and check firmware setting...
Enable root SSH login on Ubuntu 22.04
Steps for enabling root SSH login on Ubuntu 22.04, with configuration validation and important security precautions.
Which ports do IMAP, POP3 and SMTP use?
Common email ports: IMAP 143/993, POP3 110/995, SMTP submission 587/465 and SMTP relay 25.
Install a Let’s Encrypt SSL certificate on Ubuntu with ...
Let’s Encrypt provides free TLS certificates. This guide shows how to install Certbot, obtain a certificate and test renewal on Ub...
Getting started with jQuery
Follow these steps to add jQuery to an HTML page and run your first script.
Convert a BAT file to EXE with IExpress
IExpress is a tool included with Windows that packages a batch script into a self-extracting executable. This guide follows its wi...
What is Bootstrap?
Bootstrap is an open-source front-end framework originally developed at Twitter. It provides HTML, CSS and JavaScript components f...
CodeIgniter 3: an introduction
CodeIgniter 3 is a PHP framework for developing web applications. This introduction covers its modularity, security, performance a...
What is jQuery?
jQuery is a JavaScript library that simplifies dynamic interactions and animations on web pages.