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This patch implements savedefault NUM which allows you to specify the next boot
entry
savedefault NUM Installation Download the patch from here Download grub Unpack the grub-0.93 archive
tar xzf grub-0.93.tar.gz
Apply the patch in the stage2 directory:
gunzip grub-0.93-stage2-builtins.diff.gz cd grub-0.93/stage2 patch < ../../grub-0.93-stage2-builtins.diff.gz Install grub
cd grub-0.93 ./configure make make install grub-install /dev/hda For more information please see grub’s documentation Example usage Upgrading kernels on remote machines can be a trouble maker the following configuration can save you from going to the office and fix your machine (if you have the ability to power boot your machine) /boot/grub/menu.lst
default saved
timeout 10 title RedHat - New Kernel savedefault 1 root (hd0,0) kernel /vmlinuz.new ro root=/dev/hda1 initrd /initrd.img title RedHat - Old Kernel savedefault 0 root (hd0,0) kernel (hd0,0) kernel /vmlinuz.old ro root=/dev/hda1 initrd /initrd.img
Modify the above values to fit your configuration
This will alternatively boot the two kernels, if your new kernel won’t work you only need a reboot to bring the old kernel back. If everything is ok you can change "default saved" to "default 0" or "savedefault 1" to "savedefault" and it will continue to boot with your new kernel. |
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