windows/fedora dual boot - update grub2

After kernel updates the grub boot menu will include both the new kernel version and the previous kernel version.

Remove old kernels (keeping 2)


$ yum install yum-utils
$ package-cleanup --oldkernels --count=2



Update grub's boot menu

It's probably a good idea to make a backup of the old grub.cfg file

$ grub2-mkconfig -o /boot/grub2/grub.cfg

This will update the grub config used to load the boot menu.

You can customize the menu order by renaming the 10_* entries in /etc/grub.d/

Customize the boot order:

Find the menu entries:

$ grep ^menuentry /boot/grub2/grub.cfg | cut -d "'" -f2

Set the default menu entry:

$ grub2-set-default 'one-of-the-above-menu-entries'

Check to see if it worked:

$ grub2-editenv list