grub-reboot − set the default boot entry for GRUB, for the next boot only
grub-reboot [OPTION] MENU_ENTRY
Set the default boot menu entry for GRUB, for the next boot only.
−h, −−help
print this message and exit
−V, −−version
print the version information and exit
−−boot−directory=DIR
expect GRUB images under the directory DIR/grub instead of the /boot/grub directory
MENU_ENTRY is a number, a menu item title or a menu item identifier. Please note that menu items in submenus or sub−submenus require specifying the submenu components and then the menu item component. The titles should be separated using the greater−than character (>) with no extra spaces. Depending on your shell some characters including > may need escaping. More information about this is available in the GRUB Manual in the section about the ’default’ command.
Report bugs to <bug−grub AT gnu DOT org>.
grub-set-default(8), grub-editenv(1)
The full documentation for grub-reboot is maintained as a Texinfo manual. If the info and grub-reboot programs are properly installed at your site, the command
info grub-reboot
should give you access to the complete manual.