Ubuntu 22.04: install Docker

In this tutorial, I will show you a script to install Docker and Docker Compose on Ubuntu 22.04. Today more and more applications are available in containers with Docker, I regularly have to install a new machine on Ubuntu and have to install Docker and Docker Compose. Personally, I prefer to install Docker from the …

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Hyper-V Cluster: Installation and Configuration

Introduction Through this tutorial, we will see how to set up a Hyper-v cluster under Windows Server (2012R2 / 2016/2019) step by step. Each step requires it, will take you on a tutorial to guide you in setting up a Hyper-V cluster. Prerequisites Be in an Active Directory environment, ideally having a server-side domain controller …

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Exchange: convert a shared mailbox into a user mailbox

In this tutorial, I will show you how to convert a shared mailbox to a user mailbox on Exchange using PowerShell. It happens that for the needs of consulting a shared mailbox on mobile, users request a change of mailbox type. Mobile applications do not allow you to view shared mailboxes unless you go through …

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GLPI 10: link with an Active Directory

Presentation In this tutorial, I will explain how to link GLPI 10 with an Active Directory to allow users to log in with their domain account. This link will allow you to synchronize users in GLPI, if you use an email collector, this allows you to provision user accounts and allows the import of emails …

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Create a sub-certificate authority with AD CS

In this tutorial, I will explain how to create a sub CA with Windows AD CS. Sub-CAs are underused on firewalls when SSL decryption is implemented, generating a sub-CA with Windows AD CS allows you to avoid deploying the firewall certificate if you have already deployed the root certificate. Before you begin, verify that the …

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Configure a reverse proxy with Apache on Ubuntu

Introducing the Reverse Proxy In this tutorial, I will explain how to configure a reverse proxy with Apache on Ubuntu (By adapting the Apache installation commands, this tutorial can easily be transposed to other distributions). Before getting into the technical part, let’s take a look at what a Reverse proxy is? A reverse proxy is …

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Install WSUS role on Windows Server 2025

In this tutorial, we will see how to install the WSUS (Windows Server Update Services) role on Windows Server 2025, which will allow you to have a server in your environment to control the distribution of updates for Microsoft products (Windows, Office, SQL Server, etc.). The WSUS role is also a “component” of MECM, because …

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Windows Server 2025: Enable SSH Server for Remote Access

In this tutorial, I will explain how to SSH server on Windows Server 2025 to administer it remotely. If you have been following me for several years, this is not the first article I have done on OpenSSH on Windows Server. At the beginning of the portability of the SSH server on Windows Server, to …

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Windows Server 2025: Joining the Computer’s Active Directory Domain

In this tutorial, we will see how to join a computer running Windows Server 2025 to an Active Directory domain. Before joining the Active Directory domain, you must have a user (administrator) account in the target domain with the necessary rights to add a computer. Before you make sure that the domain join is successful, …

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Installing Windows Server 2025

In this first tutorial, dedicated to Windows Server 2025, we will see its installation, which differs very little from other versions of Windows Server. At the time of writing this tutorial, Windows Server 2025 is still in “preview.” I will also not cover the hardware requirements regarding CPU and RAM which will depend on several …

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Outlook: Unable to display image

In this “troubleshooting” tutorial, I will give you one of the solutions when you are using Outlook and images are not displayed. I encountered this problem recently in a corporate environment, with images not displaying on computers. When I clicked on Upload images in the message, I then got the message “Unable to display image”. …

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