On Fri, Jul 7, 2017 at 8:28 AM, Harry Putnam <rea...@newsguy.com> wrote: > Googling to find out if it is necessary to reinstall the bootloader > and update grub.cfg afer update world installed grub2 update. > > I was buried in directions to install grub2, or move from old grub to > grub2. But not what I wanted to know short of reading all hits word > for word. > > So, (sniveling over), do I need to reinstall the boot loader and > update grub.cfg like when it was newly installed?
Good question(s). You don't really *need* to reinstall; the old version will continue to run/boot indefinitely. If you want to use the new version to boot your system, you should re-run grub-install, which will copy the modules to /boot/grub and will install the core image to your MBR or EFI system partition. You only need to re-generate grub.cfg if you make a change to your kernel/initramfs images in /boot; your existing grub.cfg file will continue to work otherwise.