SysAdmin

This guide gives a step-by-step guide on how to install VirtualBox extension pack using a GUI or a CLI in Windows, macOS or Linux. Get insight into some of its features.

Need a reference sheet for all the important MySQL commands? Check out this MySQL Commands article which includes a downloadable MySQL cheat sheet in PDF format.

Environment variables store values that help build the system environment and run processes. In this tutorial, learn how to set, view, and unset environment variables in macOS.

In order to properly track your changes and push them to Git, you need to set a remote upstream branch. Learn about upstream branches and how to set them in this tutorial.

An IDE is like a toolbox and a Code editor is like a power tool. In this article, we review 9 IDEs and 5 Code editors for Python. Discover the best one for you.

To avoid compatibility problems when implementing new PHP-related features or debugging a website, it is useful to know the PHP version you are working with. This tutorial explains how to check the PHP version running on your website or a local…

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.

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.

The umask command on Linux lets you interact with your system's default permissions and fine-tune permissions for new files and folders. This tutorial shows you what umask is, how it works, and how best to use it.

The Kubernetes command-line tool, kubectl, allows you to control Kubernetes by carrying out HTTP requests to the Kubernetes API. This reference guide provides a list of the most common kubectl commands, along with a handy, downloadable cheat sheet.