Networking

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.

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.

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

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.

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.

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

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.

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.

The select() system call enables a program to keep track of multiple file descriptors.
In this article, learn about Linux select() in synchronous I/O multiplexing.

Python structs help pack and unpack raw byte data. Learn how to use the struct library in this guide through practical examples.