In this tutorial, I will explain how to configure the default applications (browser, PDF reader…) using a Group Policy (GPO) in an Active Directory environment. Puzzle of IT services, it is the use of default programs for certain types of files (PDF, Images) or even Internet browser, the configuration of such a group strategy allows …
In this tutorial, I will explain how to activate the firewall on a computer with Ubuntu and manage it with UFW. UFW for Uncomplicated Firewall is a simplified Netfilter command line utility, it is a simple alternative to iptables, which allows to manage firewall rules. If UFW is not installed, use the following command to …
In this tutorial, I will explain how to display the members of an Active Directory group in PowerShell. I already see some reaction of the style, we can have it from the graphical interface, it’s true, but in some cases the use of PowerShell saves a lot of time, especially when using ADGLP I will …
In this tutorial, I will explain how to delete a mailbox on Exchange 2016/2019, without deleting the user who is linked to this mailbox. On the ECP interface, if you use the trash can icon in addition to deleting the mailbox, this deletes the user in the Active Directory, or it happens in some cases …
In this tutorial, I will explain how to configure a receive connector to send emails outside your organization from Exchange. You have already configured a receive connector on Exchange in order to be able to receive e-mails from applications, copiers or any other devices. Now you need to send mail to external addresses (gmail.com, outlook.com …
In this tutorial, I will explain how to solve the error : WARNING : REMOTE HOST IDENTIFICATION HAS CHANGED. This error mainly occurs when you reinstall a Linux server with the same IP address and you have registered the thumbprint (key). Since the server has been reinstalled, it is normally that the key is changed. …
In this tutorial, I will explain how to solve error 0x800f0954 with the PowerShell Add-WindowsCapability Cmdlet when trying to install a Windows feature. This error mainly occurs when you use a WSUS server to update your Windows computers and therefore when using the Cmdlet Add-WindowsCapability, it will look for files on the WSUS server. Here …
In this tutorial, we will see how to configure the size of systemd logs on an Ubuntu distribution. By default, the logs located in the /var/log/journal folder can take several gigabytes of disk space. As can be seen from the screenshot below, the logs take up 4 Giga of disk space. The configuration of the …
In this new tutorial dedicated to Zabbix, I will explain how to monitor a web server under Nginx in order to have performance metrics. For monitoring, Zabbix agent should be installed on Nginx server, as we will use it to collect statics which will then send to Zabbix monitoring server. Before configuring monitoring at Zabbix …
In this tutorial, I will explain how to easily install nano on Windows (Desktop and Server). If you regularly use Linux, you are certainly familiar with it, for those who do not know nano, it is a command line text editor and it must be said that sometimes it is missing on Windows, particularly when …