Merge pull request #10 from sarraKs/master

Update index.md

docs/index.md

@@ -46,19 +46,55 @@ can choose which enablers are of interest to you.
 
 ## Prerequisites
 
+### Tested configuration
+
+Virtualbox
+Ubuntu 22.04.2 2G RAM 25G Disk
+Docker Engine on Ubuntu: Docker 24.0.4 and Docker compose 2.19.1
+
+### Virtualbox
+
+Download Virtualbox from [here](https://www.virtualbox.org/)
+
+### Ubuntu
+
+Download Ubuntu LTS from [here](https://ubuntu.com/download/desktop)
+
+To set up the working environment, follow these steps: 
+- Open Virtualbox and create a new virtual machine.
+- Select the ISO image downloaded earlier (.iso file).
+- Choose a username and a password. Check the "Guest Additions" option (to enable features such as shared clipboard and shared folders).
+- Set the memory size to 2GB and allocate 2 CPUs.
+- Create a virtual hard disk with a size of 25GB.
+- Finish the setup process and start the virtual machine.
+
+If you encounter the error "Username is not in the sudoers file. This incident will be reported" when attempting to execute a sudo command, follow these steps to resolve the issue:
+- Restart your virtual machine. While restaring, press the Shift key for a few seconds to get the Grub boot menu.
+- Using the Down Arrow, select "Advanced options for Ubuntu" and press Enter.
+- Select the kernel with the "recovery mode" option and press Enter to open the Recovery menu.
+- In the "Recovery menu", move over to the line "root Drop to root shell prompt", then press Enter.
+- Use the root password and press Enter to start the "maintenance mode".
+- At this point, you should be at the root shell prompt. Change the system to be mounted as read/write by running the command: "mount -o rw,remount /"
+- Execute the following command to add the user to the sudo group: "adduser username sudo" (use the actual username on the system).
+- Type the exit command to go back to the "Recovery menu": "Exit"
+- Use the Right Arrow to select <Ok> and press Enter.
+- Press <Ok> to continue with normal boot sequence.
+
 ### Docker and Docker Compose <img src="https://www.docker.com/favicon.ico" align="left"  height="30" width="30" style="border-right-style:solid; border-right-width:10px; border-color:transparent; background: transparent">
 
 To keep things simple all components will be run using [Docker](https://www.docker.com). **Docker** is a container
 technology which allows to different components isolated into their respective environments.
 
 -   To install Docker on Windows follow the instructions [here](https://docs.docker.com/docker-for-windows/).
 -   To install Docker on Mac follow the instructions [here](https://docs.docker.com/docker-for-mac/).
--   To install Docker on Linux follow the instructions [here](https://docs.docker.com/install/).
+
+#### install Docker Engine on Ubuntu
+
+Follow the instructions in this [link](https://docs.docker.com/engine/install/ubuntu/#install-using-the-repository) to install Docker using the apt repository.
 
 **Docker Compose** is a tool for defining and running multi-container Docker applications. A series of `*.yaml` files
 are used configure the required services for the application. This means all container services can be brought up in a
-single command. Docker Compose is installed by default as part of Docker for Windows and Docker for Mac, however Linux
-users will need to follow the instructions found [here](https://docs.docker.com/compose/install/).
+single command.
 
 You can check your current **Docker** and **Docker Compose** versions using the following commands:
 
@@ -101,11 +137,6 @@ FIWARE Postman collections can be downloaded directly from the
 development environments that spins up an automated dev environment for each task, in the cloud. It enables you to run
 the tutorials in a cloud development environment directly from your browser or your Desktop IDE.
 
-### Cygwin for Windows <img src="https://www.cygwin.com/favicon.ico" align="left"  height="30" width="30" style="border-right-style:solid; border-right-width:10px; border-color:transparent; background: transparent">
-
-The tutorials start up their services using a simple Bash script. When working locally, Windows users should download
-[cygwin](http://www.cygwin.com/) to provide a command-line functionality similar to a Linux distribution on Windows.
-
 ### Apache Maven <img src="https://maven.apache.org/favicon.ico" align="left"  height="30" width="30" style="border-right-style:solid; border-right-width:10px; border-color:transparent; background: transparent">
 
 [Apache Maven](https://maven.apache.org/download.cgi) is a software project management and comprehension tool. Based on