Hi ! Thanks for your help, I see you’re very active on this kind of topic and it’s pleasant. Unfortunately, as for the grub rescue prompt, none of the commands work. “help” doesn’t work, “lsmod” doesn’t work, “linux”, “normal” or even “boot” doesn’t too, and so on. The only known commands I tried and worked was “ls” and “set”.
As for this
this was the one I followed for reinstalling grub and didn’t work.