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HTTP benchmarking with wrk2

DevOps GitLab

One important step of any DevOps toolchain consists in testing the performance of the web application before the new version is deployed in production. HTTP benchmarking is a complex subject as a lot of parameters intervene in the perceived performance of the application.

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Install and use Dell OpenManage Server Administrator (OMSA) on Ubuntu

Sysadmin

Dell OpenManage Server Administrator (OMSA) is a Dell utility to monitor your Dell servers. Here is how to install and use OMSA on a Ubuntu server...

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Run your Laravel application on Kubernetes

Kubernetes Laravel

In this blog post series we will present how to deploy a Laravel app on Kubernetes. In this first tutorial, we start with a simple setup, and leave horizontal scaling and high-availability for a follow-up post...

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Multi-tenant Kubernetes cluster : namespace, quota and kubectl user

Kubernetes

When multiple users must use the same kubernetes cluster, a good practice consists in segregating them in isolated namespaces. In this tutorial we show how to create a namespace, apply quotas so the user cannot exhaust the resources (memory and cpu) of the cluster, and create a dedicated kubectl user.

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Add users to a group in Nextcloud

Nextcloud

If you are administrator of a group in Nextcloud, you have the possibility to create accounts yourself, and to add these new users to your group. Doing so, they will have access to all folders shared with the group. Here is a step-by-step example.

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Create your own VM image for the Cyber Range

Cyrange Cyber Range

cyrange is a Cyber Range platform built on top of VirtualBox. It brings some some additional features to support education and training:

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Change the MAC address of your Linux system

Offensive Security Sysadmin

Still today, some network monitoring tools and security systems rely on the MAC address of the host. However, a MAC address is not an authentication mechanism! It can be easily changed. More precisely, by default most operating systems will use the MAC address burnt into the network interface as the source MAC address for all emitted Ethernet frames. But you can easily reconfigure your system to change this behavior. Here is how to do that on a Linux computer.

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Training session GIT, GitLab and CI

News Training GitLab

We are organizing a new training session on git, GitLab and Continuous Integration (CI) for Python developers.

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Automated web application testing with PHP, Selenium and GitLab

PHP GitLab

The easiest way to test that a web application is working correctly is to use a browser and manually go through the pages. If one wants to automate the testing process, there are conceptually two possible approaches: 1) using raw HTTP requests to simulate a browser or 2) using some library and code to drive an actual browser.

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Run your Laravel app with docker-compose

Laravel Docker PHP

Docker-compose is an elegant way to run a Laravel app. It allows to define and run the different services: the main web app, a MySQL database and a redis server. There are however a few tricks to solve: how to run the database migrations, how to run the queue worker and the scheduler?

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Opportunities of COVID-19 (mis)information

SOCMINT

The ongoing COVID-19 crisis is being discussed a lot on social media platforms. Researchers and social media platforms a like make use of the online conversation to increase their situational awareness about the continuously evolving situation. At the same time, foreign powers or special interest groups have also been observed of piggybacking the large scale discussion to spread fake news and/or misinformation.

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Installing the cyrange Cyber Range platform

Cyrange Cyber Range

cyrange is a Cyber Range platform built on top of VirtualBox. Like some other tools, it has a web interface that allows to deploy and manage virtual machines.

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