Install Ubuntu 20.04.1 as Virtual Box Guest on Fedora 32 Server

First follow https://computingforgeeks.com/how-to-install-vagrant-and-virtualbox-on-fedora/  Per standard procedure deploy Ubuntu Virtual Box Guest via local ISO image. Right after logging into newly created instance run :-

$ sudo apt install build-essential dkms linux-headers-$(uname -r)

Then Goto Menu option "Devices" and select from drop down list "Insert Guest =>Additions CD Image" . Perform actions requested by raised up window. Shutdown Ubuntu instance and start again to be able scale guest window as advised in video

https://www.youtube.com/watch?v=x5MhydijWmc

$ sudo dnf update -y ;  $ sudo shutdown -P now

Attach to F32 VM VBoxGuestAdditions_6.1.14.iso. Start up VM

Index of /virtualbox/6.1.14

  $ sudo dnf install kernel-headers kernel-devel make

  Copy content of DVD attached  to /root/VBoxGuestAdditions  as root

  # cd  

  # cd VBoxGuestAdditions 

  # ./VBoxLinuxAdditions.ru

  

Shutdown F32 Guest and start again

Two VMs running at a time