Networking

SSH vs. SSL: What Are the Differences?

February 23, 2023

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.

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How to Set Up Static IP Address for Raspberry Pi

February 22, 2023

Setting up a static local network IP address on a device ensures that its location on the network persists across reboots. Static IPs are especially useful when accessing devices remotely (e.g., over SSH). This tutorial shows you how to configure a static IP address on Raspberry Pi.

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How to Change the SSH Port?

February 13, 2023

This tutorial shows the steps required for changing the default SSH port into a different one. A different port adds an extra layer of protection to the connection.

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Error 520: What It Means and How to Fix It

February 9, 2023

This guide explains what error 520 means, what causes it, and how to fix it.

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How to Configure Postfix to Use External SMTP


Postfix is a free mail transfer agent that uses SMTP to route and deliver emails. This tutorial shows how to configure Postfix to use an external SMTP server.

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How to Use telnet Command in Linux?

January 25, 2023

The telnet command allows users to establish an unsecure connection to remote servers or machines. This tutorial shows how to use telnet and showcases its useful features.

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How to Use The SSH Config File

January 19, 2023

Do you use the SSH config file? Learn how to utilize the SSH config file to automate and streamline SSH connections.

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How to Install Apache in Docker

January 17, 2023

Docker containers are particularly handy when an application such as a web server needs to preserve its configuration across different environments. This article demonstrates two methods to deploy Apache web server using Docker.

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How to Forward Ports With Iptables in Linux

January 12, 2023

Port forwarding allows proxy firewalls to redirect communication requests from one IP address and port to another. On Linux systems, port forwarding is frequently set up with the Iptables utility. This tutorial teaches you how to forward ports using Iptables.

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Windows CMD Commands: Mastering the Command Prompt

January 11, 2023

Windows offers over 280 CMD commands to automate various tasks through the command prompt. Read this guide and grab our free cheat sheet to master the command prompt in no time.

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