Linux Hands - On
Through this hands-on you will install Ubuntu Server on a vm. 
Setting up virtualbox
Installation of virtualbox and Downloading Ubuntu iso image
•	Download and install virtualbox 6.x 
•	https://ubuntu.com/download/server Ubuntu image from the website (Ubuntu Server 20.04.2 LTS) 
Creating the VM
•	Start virtualbox and Click on New button to create new virtual machine 
•	Enter name of the VM as: VMNAME 
•	Select OS Type: Linux 
o	Select Version: Ubuntu (64-bit) 
o	Then click on Continue button 
o	Set VM's memory size to 4096MB and click on Continue button 
o	Set VM's hard disk option to Create a virtual hard disk now and then click on Continue 
o	Select disk type to VDI 
o	Select storage type to Fixed size and Continue 
o	adjust the disk size to 50.0GB and click on Create to create the VM 
This might take couple of minutes 
(Note down the location of vdi image file when virtualbox flashes it on the screen) 
Setting up Network Interface
•	Select the VM from left panel on Virtual box, right click and open Settings 
•	Click on the Network title 
•	On Adapter 1 While Enable Network Adapter selected choose Attached to be Bride Adapter, then select the name of the network (please select only LAN connection, later it will help you to access switches) This virtual interface will work as the WAN port of the firewall (Can be connect from out side).