Update Ansible on Ubuntu

In a previous tutorial, I explained how to install and use Ansible to execute automatic actions on your Windows and Linux servers. Like all applications, Ansible is regularly updated and so to enjoy the latest features and bug fixes, you should also update Ansible. The “problem” when you go through the official repositories of distributions …

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Install Docker on Ubuntu and Debian

In this tutorial, I will walk you through how to install Docker and Docker Compose on Ubuntu and Debian. Installation of Docker and docker-compose from the official repositories Docker and docker-compose are part of the official repositories of both distributions (Ubuntu and Debian), so just run the two commands below: Installing Docker: Installing docker-compose: The …

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Ubuntu: Install a Remote Desktop Server with XRDP

In this tutorial, I will explain how to install xRDP in order to have a remote desktop server (or rather a service) on Ubuntu. The purpose of this installation is not to make a remote desktop farm so that several users can connect to it simultaneously, but to be able to take control of Ubuntu …

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Crowdsec: send logs to Elasticsearch (ELK)

In this tutorial, I will explain how to send decision logs to Elasticsearch (ELK) so that you can create a dashboard to use the logs. What you need to achieve what described in the tutorial: Crowdsec version 1.2.x or higher an Elasticsearch server or an ELK stack Since version 1.2 of Crowdsec, a notification system …

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Ubuntu 20.04: add swap space

In this tutorial, I will walk you through how to add swap space on Ubuntu 20.04 and above. A swap space on Linux is a location on the disk, which allows the OS to load the random access memory (RAM), on Windows we find this type of file pagefile.sys By default, on server versions of …

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Docker: manage your containers with Portainer.io

In this tutorial, I will explain how to manage your Docker containers with Portainer. Portainer is an application that runs under Docker and will allow you to have a graphical interface (Web) to manage your containers under Docker. With Portainer you will be able to: Create / Modify / Delete containers Administrators your containers (SSH …

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ncdu: analyze disk space in command line on Linux

In this “‘little” tutorial, I will explain how to view and analyze the space in the command line on Linux with ncdu. If you are adapted from WinDirStat or TreeSize on Windows, the ncdu utility on Linux allows you to have the “same” thing in a terminal. The first thing to do is to install …

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Ubuntu – Extend LVM partition and disk

In this tutorial, I will explain how to extend a disk’s partition and then the LVM disk. To understand what we are going to do in this tutorial, I have a virtual machine with Ubuntu Server 20.04 installed on an LVM disk, following the addition of data, I must increase the storage capacity, for that …

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Nginx: generate a Let’s Encrypt certificate

After seeing how to install and configure Nginx as a reverse proxy and harden security with Crowdsec, I will explain in this tutorial how to generate a Let’s Encrypt certificate. As a reminder, Let’s Encrypt is a free certification authority, which allows you to obtain SSL certificates for free. If you want to generate SSL …

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PFX certificate: extract the certificate and the private key

In this tutorial, I will explain how to extract the certificate and the private key from a certificate in PFX format with OpenSSL. The easiest way to use OpenSSL is to use a Linux computer. 1. Copy the PFX file to your computer where OpenSSL is installed. 2. The first step will be to extract …

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