Debian sets up grub differently from fedora. Besides the fact that debian based distros put grub files in /boot/grub and fedora puts grub files in /boot/grub2, fedora does not setup grub like most other distros.
If the partition layout is still the same as in your other thread this may produce the fedora grub menu.
If the grub menu doesn't appear and /or the partition layout has changed will need more information to give any advice henceforth the suggestion to run the boot-repair info script.

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Is sdb the windows drive? You seem to be selective on which questions you answer. At this point, you will need to download and run the bootinfoscript as suggested as that will provide the most detailed information for you to get some help.

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>>>>>>>
Accordingly, I have booted the boot-repair-cd usb into my my pc and had extracted the boot info and guided by the app and was posted to
https://paste.ubuntu.com/p/kcRw8Gb5mG/.

A note though, after much frustrated attempts to get the bootloader to work, I have tried numerous utilities .
Finally I have used Sergei strelec winPE to restore windows 10 bootloader to get into windows OS.
Unfortunately this bootloader can see windows partition only and not Debian, Fedora and Elementary OS-
which I have installed during this period.
Hence I am still unable to boot into those Linux OS.

Kindly advise
Thanks

>>>>>>>>>>>>
Using LXTerminal on the <boot-repair-cd> usb, I have typed grub> but I get the error bash: syntax error near unexpected token 'newline'.
what is missing?

NO, this done at the grub> prompt when you first turn the system on. This is based on your previous post:
However based on the boot-repair-info the partition layout has changed and I don't think post16 will work, I need to study the boot-info before giving any other advice.

Are you still able to boot windows? At some point did you reinstall windows? The current linux root partition on sda10 of 13.9G is not big enough.

Based on the boot-info, if it was me I would backup all important files, clear the sda drive of all partitions and do a complete reinstall of windows and linux. If you don't wont to reinstall windows, delete partitions 6 and 8-14, keep partition 7
during the partitioning stage let the installer do the partitioning

Maybe someone else will have a better way of fixing.

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[QUOTE=colorpurple21859;6424503]NO, this done at the grub> prompt when you first turn the system on. This is based on your previous post:

However based on the boot-repair-info the partition layout has changed and I don't think post16 will work, I need to study the boot-info before giving any other advice.

Are you still able to boot windows? At some point did you reinstall windows? The current linux root partition on sda10 of 13.9G is not big enough.

>>>>>>>>>>>>
Yes after I am able to boot to Windows 10 -using Sergei Strelec to fix the bootrec /fixmbr.
Windows 10 is now intact throughout this time. No I didnt reinstall Windows.

The current linux root partition on sda10 of 13.9G is not big enough.
What is the ideal size for a root partition. In case I may need to re-install Debian\Fedora?

Thanks

The size of the root partition is subject to specualtion and prefernce. It mostly depends on how the system is used and partition layout. I wouldn't go no less than 35G, I prefer to have at least 80G if not more on the systems I use daily

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@1530hrs, I have finally managed to get my Debian 11 setup & running successfully with dual booting to Windows 10 after numerous trial and error. Thanks to all kind moderator & senior LQ. who have been patiently assisting me on this. Especially to colourpurple21859 who have been assisting me to this end.
Thanks

Glad you got it figured out.

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