Fix: “Initramfs unpacking failed” while trying to install Ubuntu Server in Virtual Box
Just posting a fix that took me hours of googling. While trying to install Ubuntu Server 20.04 on Virtual Box 6.1, and after mounting the Ubuntu Server ISO then starting the VM, I encountered this error:
Turns out I reduced the RAM of the VM to be 512MB, adjusting the RAM to 768MB fixed it!
Thanks to @mrtumnus for posting his answer at serverfault:
Hope I saved you some googling time!