Networking

This tutotial shows you how to use the whoami command to find the name of the effective user on a Linux system.

The Domain Name System (DNS) translates text-based domain names to numeric IP addresses. Most networks are configured to work with DNS servers provided by the ISP. This tutorial shows you how to change DNS addresses in Ubuntu.

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.

This article demonstrates 3 distinct methods used to port forward SSH connections. It examines the syntax of the individual commands and teaches you everything you need to know to implement SSH port forwarding successfully.

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.

The default MTU value on phoenixNAP's BMC servers is jumbo frames (9000 bytes). Learn about MTU and jumbo frames, and how to adjust it in Windows and Linux.

Learn how to use iptables commands and see how iptables works. By following the instructions listed in this article, you'll get a better understanding of network packets, and can configure basic rules for your system and set up ports on the firewall to meet your security needs.

Despite the reliability of Apache web servers, the "403 Forbidden" error is not uncommon. This tutorial goes over different issues that could cause the Apache "403 Forbidden" error and methods to fix them.

dig (Domain Information Groper) command is a tool for querying DNS name servers. It is a helpful command for diagnosing DNS problems but is also used to display DNS information. Learn how to use this command by following this article.

There are many potential causes for the "localhost refused to connect error". Troubleshoot the issue and learn how to solve the problem with this step by step guide.