On Sat, Jan 25, 2014 at 11:18 AM, Graham Murray <[email protected]> wrote: > Andrés Becerra Sandoval <[email protected]> writes: > >> If you put the kernels in /boot with proper names and launch: >> >> grub2-mkconfig -o /boot/grub/grub.cfg >> >> Grub will set up the kernels for you. > > How do you then choose which one to boot by default? I normally run > hardened-sources but also want to occasional boot (eg test) the latest > gentoo-sources kernel which is often a higher version than the latest > hardened one. So I might have (in /boot) > vmlinuz-3.12.6-hardened-r4 > vmlinuz-3.12.8-hardened > vmlinuz-3.12.8-hardened-r1 > vmlinuz-3.13.0-gentoo-r1 > > grub2-mkconfig will set the highest version as the default (ie without > manual menu selection) to boot. I would like to configure it so that the > default is the latest -hardened. >
Overriding the default is a bit tricky. grub-mkconfig generates submenus by default, so you end up having to do something like this in /etc/default/grub: GRUB_DEFAULT=""gnulinux-advanced-508868e4-54c6-4e6b-84b0-b3b28b1656b6>gnulinux-3.10.9-advanced-508868e4-54c6-4e6b-84b0-b3b28b1656b6" Thats "gnulinux-advanced-508868e4-54c6-4e6b-84b0-b3b28b1656b6", followed by a ">", and then "gnulinux-3.10.9-advanced-508868e4-54c6-4e6b-84b0-b3b28b1656b6". The former is the submenu id, and the latter is the menuentry within the submenu. I believe there will be a way to shut off the submenu stuff in grub-2.02, which is in beta now.
