On Linux systems, proper user management is the foundation of security, stability, and audit compliance. One incorrectly configured user with root access can become a vulnerability for the entire infrastructure. Therefore, a system administrator must know not only basic commands, but also groups, permissions, restrictions, and activity logging. 👥 Basic user management commands Here are…

In today’s IT world, failures, attacks and human error are not “if” but “when”. Therefore, backup has become an art in which strategy, recovery speed and budget are important. The choice of tool depends on the scale of the infrastructure, the criticality of the data and financial capabilities. Today we will consider three popular players:…

DDoS attacks are a headache for any system administrator. At the same time, many companies cannot afford expensive commercial protection solutions like Arbor or Akamai. The good news is that there are affordable and effective methods that can be implemented in a couple of hours. In this article, we will tell you how to use…

In modern DevOps and systems administration, manual infrastructure management is becoming a thing of the past. Automation tools like Ansible and Terraform are taking its place. They help reduce errors, speed up server deployment, ensure configuration consistency, and simplify scaling. But how do these tools differ? When should you use each of them, and how…

Active Directory (AD) is the cornerstone of most enterprise IT infrastructures. AD provides centralized management of users, computers, groups, policies, and access. But as threats grow and networks become more complex, it’s vital to understand how to properly organize, secure, and back up AD. 1. How does Active Directory work? Active Directory is a database…

PowerShell is a powerful automation tool for Windows administrators. It allows you to manage servers, perform automated tasks, and solve common problems without using complex graphical interfaces. In this article, we will look at the top 10 PowerShell scripts that will make your work much easier and improve your efficiency. 1. Getting a list of…

Modern IT infrastructures need reliable and flexible monitoring. Errors, overloads, failures — all this can be predicted and prevented with the help of competent monitoring. Three popular tools — Zabbix, Prometheus and Grafana — have become the standard in system administration. Let’s figure out what to choose and for what tasks. 1. Zabbix: all-in-one for…

With Windows Server 2022, Microsoft is focusing on security, flexibility, and cloud integration. This version is aimed at both enterprise data centers and hybrid infrastructures. In this article, we will look at the main features that make Windows Server 2022 a major step forward. 1. Advanced security: Secured-core Server Windows Server 2022 introduces Secured-core Server,…