![]() ![]() ![]() In general, users should honor the comments and leave these lines alone, adding custom entries below the existing lines. The current 40_custom file contains only lines which are not actually imported into grub.cfg. The two scripts which actually place items into the menu are /etc/grub.d/10_linux, which locates kernels in the default Ubuntu partition, and /etc/grub.d/30_os-prober, which builds entries for operating systems found on other partitions.įor information on these files/folders please refer to the Grub2 page.Ī sample custom menu called 40_custom is provided in the /etc/grub.d/ folder. Most custom menu users will want to allow these components to continue to operate normally. The /etc/default/grub file contains most of the user-defined variables such as display time, menu resolution and default menuentry. The GRUB 2 menu configuration file ( grub.cfg) includes section remarks showing which script is responsible for creating the section. These scripts include /etc/grub.d/00_header and /etc/grub.d/05_header. GRUB 2 constructs the menu via a series of scripts, with each script building a portion of the menu. Loss of input of some user preferences from the /etc/default/grub file. Lack of automatic updates, depending on how the custom menu is constructed.Password protection for specific entries rather than an entire class of operating systems can be made.Items are easily placed in any order on the menu. ![]() Kernel and system updates will not change the position or options of a menu item.The menu only changes when the user edits it.This page details how to build and incorporate custom menus into the GRUB 2 menu.Ĭustom menus offer many benefits over the default GRUB 2 menu. GRUB 2's custom menus allow the system to provide the basic building blocks of the boot menu while allowing the user to control what actually appears on the screen. Others may want a menu which more closely follows the way GRUB 0.97 operated. Nevertheless, users may want to build a menu, or part of a menu, which does not change or which allows specific inputs not easily attained via the scripts. When new kernels are added or the system is updated, GRUB 2 automatically rebuilds the menu to keep it current and to reflect the latest system boot options. The scripts are highly configurable and produce a menu which requires little user input. GRUB 2 runs a series of scripts which search the user's computer and builds a boot menu based on what operating systems it finds. ![]()
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