https://itsfoss.com/fix-minimal-bash-line-editing-supported-grub-error-linux/
In cmd run the followings:>
>sudo add-apt-repository universe
>sudo add-apt-repository ppa:yannubuntu/boot-repair
>sudo apt-get update
>sudo apt-get install boot-repair
run >boot-repair &
boot from usb (press F12 on reboot) , run on usb ubuntu19.10
use GParted to create partition and format (ext4) the external SSD (usb connected)
38G for root /, 10G for swap
reboot again, (press F12 on reboot) , run on usb ubuntu19.10, select insatll (safe graphics) the partitions (no need to format becuase it has been formatted above)
38G for root /, 10G for swap
may need this : https://blog.pcrisk.com/windows/12622-an-administrator-has-blocked-you-from-running-this-app#disable-windows-smartscreen-feature
https://www.diskpart.com/windows-10/windows-10-disk-management-0528.html
https://www.groovypost.com/howto/create-partitions-windows-10-macos-linux/#windows10
https://rufus.ie/ for bootable usb, https://turbofuture.com/computers/How-to-Create-a-Bootable-USB-Ubuntu-Installer-in-Windows
https://ubuntu.com/download or latest ubuntu download
The screen may be flashing during installation?
https://linuxconfig.org/how-to-install-google-chrome-web-browser-on-ubuntu-19-10-eoan-ermine-linux