https://askubuntu.com/questions/88384/how-can-i-repair-grub-how-to-get-ubuntu-back-after-installing-windows
Boot repair Ununtu
https://help.ubuntu.com/community/Boot-Repair
https://help.ubuntu.com/community/Grub2/Installing
https://help.ubuntu.com/community/Grub2/CustomMenus
https://help.ubuntu.com/community/Grub2
In case you still experience boot problem, indicate this URL to:
[email protected]
Please do not forget to make your BIOS boot on sda5/EFI/ubuntu/shimx64.efi file!
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sudo add-apt-repository ppa:yannubuntu/boot-repair sudo apt-get update sudo apt-get install -y boot-repair && boot-repair
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3 times before this
https://paste.ubuntu.com/p/6R42CzZW3Q/
https://paste.ubuntu.com/p/sFR2TkzgVH Sun 03 May 2020 10:31:35 PM UTC
https://paste.ubuntu.com/p/JymkMsmbzz/ Sun 03 May 2020 10:45:40 PM UTC