Networking

This tutorial covers the use of several networking tools and utilities for pinging a specific port number. Even though the primary use of the ping command does not involve ports, it can be used in order to check if a port is open or not by trying to establish a connection with it.

The who command belongs to the GNU coreutils package in Linux. Its main purpose is to provide system administrators with information about the users who are currently logged into the system. This tutorial provides examples for the use of the command along with its options.

The ss (socket statistics) tool is used for displaying various network and socket statistics. It is a faster version of the neststat tool. This article gives an in-depth overview of how to use it with various examples.

Read about the most commonly used netstat commands for Linux and see examples of their usage.

The ifconfig command is a tool for network interface management that is used to enable/disable interfaces, manage IP addresses, netmasks, MAC addresses, etc. This tutorial shows how to install and use the ifconfig command on CentOS 7.

SSH is a network protocol designed to provide a more secure network communication by employing encryption. This article deals with the mechanism behind SSH and its layers, and lists some of its common use cases.

Proxy servers are commonly found on local business networks, providing an additional security layer. Among personal users, they are popular because they help increase privacy and speed. This tutorial shows how to set up a proxy on Ubuntu 20.04.

This article shows you numerous ways to test network speed in Linux via CLI. Learn how to install and use 9 online tools to test internet speed from the command prompt window,

Hostname is a unique identifier of a computer on a network. This tutorial details ways in which you can change your Ubuntu 20.04 machine's hostname, using command line or GUI.

In this tutorial, you will learn how to set up OpenVPN on a CentOS 7 server and how to connect to OpenVPN from a client machine. Establish a secure connection to a company network, bypass geo-restrictions, and allow you to surf the web using public Wi-Fi networks while keeping your data private with OpenVPN.