I have three Linux installs and one Windows 8.1 install on my computer. Now, I've only installed Grub2 on one Linux install. So, I always have to login to that one to use update-grub. The problem is, I want to get rid of exactly that Linux install.
So, my goal is it to get it to work, that I can use update-grub from another install, while keeping the grub installation, that is sitting on my EFI partition.
The install that should be the one for updating grub2 from now on is Arch.
Is this somehow possible and if how?