x86: How to Manually Regenerate the GRUB Menu

Use the bootadm generate-menu command to manually regenerate a grub.cfg file that contains the OS instances that are currently installed on a system.

Information from the /usr/lib/grub2/bios/etc/default/grub or the /usr/lib/grub2/uefi64/etc/default/grub file, combined with information from GRUB meta configuration file, rpool/boot/grub/menu.conf, is used to generate the final grub.cfg file.

1. Assume the root role.

   See Using Your Assigned Administrative Rights in Securing Users and Processes in Oracle Solaris 11.2 .

2. Generate the grub.cfg file.

   # bootadm generate-menu

   • If the grub.cfg file already exists, use the –f option to overwrite the existing file.

     # bootadm generate-menu -f

   • Generate a new GRUB menu for a root pool other than the current root pool, as follows:

     # bootadm generate-menu -P pool-name

3. Verify that the menu has been updated to reflect the changes.

   # bootadm list-menu

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   Note - If you do not see your changes, check the grub.cfg file to verify that the change was made.

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