How to Fix SSH Failed Permission Denied (publickey,gssapi-keyex,gssapi-with-mic)

February 4, 2021

The Permission Denied (publickey,gssapi-keyex,gssapi-with-mic) error appears after a new package installation or the creation of new users on an SSH server. This tutorial shows you how to troubleshoot and fix this error.

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How To Use Linux SS Command

February 3, 2021

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.

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Netstat Command in Linux - 28 Commands with Examples

January 28, 2021

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

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How to Install and Use ifconfig on CentOS 7

January 12, 2021

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.

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How to Deploy NGINX Reverse Proxy on Docker

January 6, 2021

The easiest way to set up a reverse proxy is using Docker and Nginx. Learn how to set up reverse proxy for web servers by running each service in a Docker container.

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How Does SSH Work?

December 17, 2020

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.

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How to Configure Proxy Settings on Ubuntu 20.04

December 10, 2020

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.

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How to Test Network Speed in Linux via CLI

November 25, 2020

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,

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How to Change Hostname on Ubuntu 20.04

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.

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Apache 403 Forbidden: Reasons and How to Fix It

Despite the reliability of Apache web servers, '403 Forbidden' errors are not uncommon. This tutorial goes over different things that could cause an Apache '403 Forbidden' error and ways to fix them.

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