Automatic install of Redhat 9 using Kickstart

We talk about creating a new user and talk about user permissions and create login profile and start script, all needed for bootstraping user login.

We upgrade Debian using a simple guide to go from Jessie to buster and looking at the different upgrade steps required to guide you through the process to get your Debian upgraded. Upgrade from Debian Jessie to Buster First of we ensure that the current installation is as upgraded as possible and that all the…

We will create an image from scratch in docker and add that to a docker registry so we can reuse that image when we create new docker instances, controlling the whole flow. Working with docker and registry First of we install the docker client, server and registry on our debian machine. apt install docker docker.io…

We talk about the different collection structures in Java and how to measure their performance and memory footprint Simple example of performance testing for collection types in java: package org.ea.debugger; import java.lang.management.ManagementFactory; import java.util.*; import java.util.function.IntConsumer; public class CollectionTest { public static void sleep() { try { Thread.sleep(3000); } catch (Exception e) { e.printStackTrace(); }…

Looking into the configuration file and talk about what the different parameters mean