Security

SSH (Secure Shell) and SSL (Secure Sockets Layer) protocols are cryptographic technologies that ensure secure communication over the internet. This guide explains how they work, what makes them different, and which one to use.

This article compares and gives advice on choosing between SSH and HTTPS - two network protocols used to secure the connection to remote repositories.

The chpasswd command in Linux is a useful tool for batch-updating passwords. This article provides examples and explanations of how to use chpasswd for optimal security.

Hackers are always on the lookout for server vulnerabilities. Minimize risks and be confident your data is safe on secure servers by implementing our server security best practices.

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.

Learn how to list and delete iptables rules and protect your system.
This tutorial will teach you how to harvest the full potential of the Linux firewall.

AppArmor and SELinux, allow system administrators to grant or deny access to resources and control systems built into the Linux kernel.
In this text, you'll learn how the tools differ.

By following the steps in this tutorial you will learn how to add a user to a group in Linux. Read the easy steps and learn how to expand your team. You will learn how to manage privileges for several users at once. Linux groups allow you to manage multiple user permissions more quickly and easily.

SSL certificates encrypt data sharing between a web server and a client browser to ensure information is kept safe and secure. Learn more about SSL certificate and find out why you should have one.

It is always dangerous to run a Linux terminal command when you aren't sure what it does. This article lists 14 Linux commands that can have adverse effects on your data or system.