PHP is the most widely used server-side scripting language for web development. Ubuntu 18.04 ships with PHP 7.2 in its default repositories, which is fully compatible with WordPress, Laravel, Drupal, and Nextcloud. The installation method differs based on which web server you are...

A properly configured firewall is one of the most important layers of security for any internet-facing server. UFW (Uncomplicated Firewall) is a user-friendly front-end for managing iptables rules that ships pre-installed on Ubuntu. Its defaults are sensible: block all incoming connections, allow all outgoing connections. No outside traffic reaches your server unless you explicitly open a port. This guide covers how to configure a UFW firewall on Ubuntu 18.04, from setting default policies and application profiles to writing allow and deny rules for specific ports, IPs, and subnets. Configure UFW Firewall on Ubuntu: Defaults, SSH, and Application Profiles If UFW is not installed, add it with: Check the current status: Application profiles. When you install a service with apt, it registers a profile in /etc/ufw/applications.d/. List all available profiles: Use a profile name or a port number interchangeably when writing rules. To see what ports a profile covers: Allow SSH before enabling UFW. This is the most critical step. If you enable UFW without an SSH rule and you are on a remote server, you lose access immediately: If your SSH daemon runs on a non-standard port, use the port number instead, for example sudo ufw allow 4422/tcp. Enable UFW: Type y at the prompt to confirm. Allow Port Ranges, Specific IPs, Subnets, and Network Interface Rules Common...

VMware Workstation Player is a mature, stable virtualization platform that lets you run multiple isolated operating systems on a single physical machine. You can create your own virtual machines or run virtual appliances from VMware’s Solution Exchange. Common uses include testing...

NetBeans is a free, open-source, cross-platform IDE developed by the Apache Software Foundation. It was one of the first IDEs to ship with a drag-and-drop GUI builder for Java Swing applications, and it has since grown into a full-featured development environment...

Apache is the most widely used web server in the world. It is free, open-source, and runs on Linux, Windows, and macOS. Apache handles HTTP and HTTPS requests and its feature set can be extended with a large library of modules...