Zabbix: Update from 7.2 to 7.4 with Docker
In this article I will explain to you how to go from version 7.2 of Zabbix to version 7.4 which released in early July 2025. This article is mainly intended for those who …
Tutorials
All IT tutorials: systems, networking, virtualization, security.
660 articles
Active Directory: Raise Domain and Forest Functional Level with PowerShell
After seeing how to increase the functional level of the domain and the forest using the different Active Directory administration consoles, I will explain how to do this …
Windows Server: How to Install an SSH Server - OpenSSH
In this tutorial, I will explain how to install the OpenSSH (SSH) server on Windows Server in order to administer it remotely as you would do for a Linux server and also …
Windows: Add a static route
In this tutorial, I will explain how to add a static route on a Windows computer (Servers or Desktop). To illustrate this tutorial, we will use this diagram: Here we have …
GLPI 11: installation on Linux
In this tutorial, I will explain how to install GLPI 11 on Linux (Ubuntu 24.04) with Apache2, PHP 8.3 in FPM and MariaDB. GLPI 11 is an open-source IT Service Management …
Active Directory: Create a user with PowerShell
This “how to” tutorial explains how to create users in Active Directory using the New-ADUser cmdlet in PowerShell Create a user in Active Directory with PowerShell …
Veeam: Configuring Virtual Machine Replication
In this tutorial, we will see how to set up and use replication in Veeam Backup & Replication. Before you begin, the source 1 and destination 2 servers must be added to …
Active Directory: setting up a third-party system (tiering)
In this tutorial, I will explain how to configure a tiering system in an Active Directory environment, more specifically how to configure group policies (GPOs). This …
Active Directory: Create a group in PowerShell
In this tutorial, we will see how to create an Active Directory group from a domain controller in PowerShell using the New-ADGroup cmdlet. Syntax to create a group in …
SSH: Resolve error: Warning: unprotected private key file!
In this tutorial, I will explain how to resolve the following error : Warning: unprotected private key file! when you try to SSH from Linux to another SSH server with a …
Telnet: Test an SMTP server and send an email
In this tutorial, I will explain how to send an email by telneting into an SMTP server. This manipulation is regularly used to test the correct functioning of an SMTP …
Docker: Clean up and free up disk space
In this tutorial, I’ll walk you through how to clean up Docker to free up disk space on your server or computer. Even though Docker container images don’t necessarily …