Security

firewalld is the default firewall tool on CentOS and Rocky Linux servers. This tutorial shows you how to disable and stop the firewalld service.

This phoenixNAP guide instructs how to enable and start firewalld on CentOS or Rocky Linux. It explains basic firewall zone concepts and teaches you how to work with default firewalld zones.

This article explains how to generate a key pair and use them to connect to a remote server via SSH.

In this tutorial, find out How To Use SSH to Connect to a Remote Server in Linux, Mac, or Windows.

Legacy application migration is often a necessary and difficult process. This guide takes you through the benefits, challenges, and best practices when moving legacy applications to a new and modern system.

For Linux users, the best practice of accessing and managing your server remotely is through Secure Shell (SSH). This tutorial shows how to enable, install and configure SSH on Ubuntu.

The chown command changes user ownership of a file, directory, or link in Linux. This tutorial shows how to execute the Linux chown command to control who can modify file contents.

Install an SSL Certificate on NGINX to ensure a safe connection between your web server and browser. Encrypt transmitted data over the internet so that it is only visible to the intended recipient.

This guide explores the best Linux network monitoring tools, from lightweight CLI utilities to feature-rich GUI-based platforms.

UFW is a simple interface implemented on top of iptables that provides an easier way to configure a firewall. Use it to define rules of communication to and from a server and ensure your Ubuntu is protected.