How to install Ubuntu 20.04 on Virtualbox


Download Ubuntu Server

https://ubuntu.com/download/server








Download Oracle VirtualBox

https://www.virtualbox.org/wiki/Downloads

Setup VirtualBox

Install Oracle VM VirtualBox

Click Continue

Click Install

Click close
From Applications Open VirtualBox

Click New

Name the new VM. E.G Web Server



Chose the Memory Size for the virtual Machine (Default 1 G) , it's fine.

Select Create Virtual Hard Disk Now

Select VDI (Virtual Disk Image)

Select Dynamically allocated.
Enter 25 GB or more
Click Settings


Attach the Ubuntu iso file

By default Adapter 1 is enabled and NAT is attached.

This is fine for GUI VMs

but for Ubuntu Server, we want to use SSH to connect to the VM.

So we need fixed IP

we have 3 options:

1-NAT + Host Only

2-Bridged

3-Internal Network


In the main menu click File/Host Network Manager 

DHCP Unchecked

Configure Adapter Manually

IPv4 192.168.56.1

IPv4 Network Mask 255.255.255.0


Go to out VM settings

Enable Network Adapter 2



Now we are ready, Click Start.
Ubuntu Server installation starts

No mouse in Ubuntu Server, use TAB,UP/Down Arrows

Select your Language

Update installer or Continue Without Updating
Select the Keyboard layout
adapter 1 enp0s3 which uses DHCP has IP

but Adapter 2 en0s8 needs to be configured manualy


go to en0s8 and press Enter

use Down Key and chose Edit IPv4

Select Manual and Press Enter

The Host Adapter manager had the IP 192.168.56.1

In the Subnet enter 192.168.56.0/24

IP address 192.168.56.xxx , I chose 100

In Gateway, Enter your local machine gateway 

Usually 192.168.0.1 or 192.168.1.1 

In names servers enter 8.8.8.8,8.8.8.4

The Save

Now the VM IPs are set






Type Your Name

Server Name (will be host name)

User Name (Ubuntu user)

Password

Check Install Open SSH

Ubuntu is downloading Security Updates














Ubuntu Server installation is done.

Let's connect using Secured Shell

Open Terminal/New Remote Connection

Press + to add new connection
Enter the IP of our VM
Enter the VM user name





Type Yes and Press Enter
Here we are, logged in the Ubuntu Server



Network Adapters configuration is in /etc/netplan
Here is it.
Set your tie zone using timedatectl command








 

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