Grub2 modules. E. However, similar to kernel modules...
- Grub2 modules. E. However, similar to kernel modules, they must follow a specific structure so that GRUB knows how to initialize and remove them (as there is no standard main function). On OS which have device nodes similar to Unix-like OS GRUB tools use the OS name. To discover what firmware your machine uses, run the following command: $ [ -d /sys/firmware/efi ] && echo UEFI || echo BIOS. For example, if a function is for file systems, its name is prefixed with grub_fs_. cfg are GRUB modules, not kernel modules. 62 module Command: module [--nounzip] file [arguments] ¶ Load a module for multiboot kernel image. It supports a rich variety of kernel formats, file systems, computer architectures and hardware devices. mod parses /boot/grub/grub. g. Red Hat Enterprise Linux 7 is distributed with version 2 of the GNU GRand Unified Bootloader (GRUB 2), which allows the user to select an operating system or kernel to be loaded at system boot time. 14) 17. Installation. ***This is not upstream; please send code upstream first*** - rhboot/grub2 If the function belongs to a specific function module, the name must also be prefixed with the module name. provide include/grub Jan 25, 2026 · You must construct your list of GRUB modules in the form of a shell variable that we denote as GRUB_MODULES. define GRUB_MACHINE_PCBIOS to be 1 2. 14) In this chapter, we list all modules that are available in GRUB. To active/load a GRUB module while in the GRUB command-line (CLI mode), type "insmod MODULE". Discovering the firmware type. All the standard GRUB header files from the source distribution can be included. Description grub2-efi-x64-modules - Modules used to build custom grub. These module files are not particularly complex; they are standard ELF files. For example, if a function is for file systems, its name is prefixed with grub fs . These modules are loaded so that GRUB has enough functionality to (for example) handle LVM volumes and read filesystems. after normal. In rescue mode, only . 1 Overview. Ongoing downstream work on grub2, including Fedora and RHEL. If you are building out-of-tree and have not configured the source for your system, then these can still be used with a few modifications: 1. If you can, it is advisable to install non-Linux operating systems first. GRUB 2 also allows the user to pass arguments to the kernel. Feb 16, 2025 · Before I begin, let’s talk about GRUB modules. Depending on how GRUB2 was installed, the /boot/grub/ is either in the root partition of the Linux distribution, or in the separate /boot partition. Extensive, detailed tutorial about how to setup and configure GRUB 2 (version 2, the next generation) bootloader with multiple operating systems, including GRUB legacy and GRUB 2 mix, dual-boot and triple-boot real-life testcases, upgrades, customization, troubleshooting, backup, rescue and recovery, BIOS and EFI/UEFI systems, and more This is the documentation of GNU GRUB, the GRand Unified Bootloader, a flexible and powerful boot loader program for a wide range of architectures. The modules are typically stored under /boot/grub/i386-pc/ or some similarly name directory. Normally, GRUB2 is preset to boot multiple operating systems during the Fedora installation process. for graphical UI and file system support) and shows the menu. The device syntax used in GRUB is a wee bit different from what you may have seen before in your operating system(s), and you need to know it so that you can specify a drive/partition. Next: History, Up: Introduction [Contents][Index] 1. Description grub2-efi-aa64-modules - Modules used to build custom grub. Installing GRUB2 on a BIOS system. efi images The GRand Unified Bootloader (GRUB) is a highly configurable and customizable bootloader with modular architecture. module (GNU GRUB Manual 2. Filesystem syntax and semantics: : : : : : : : : : : : 59 13. cfg, optionally loads modules (eg. Naming convention. In order to install GRUB as your boot loader, you need to first install the GRUB system and utilities under your UNIX-like operating system (see Obtaining and Building GRUB). for GNU/Linux: # grub-install /dev/sda. You will probably never have to deal with manual installation of GRUB2. define GRUB_FILE to be something appriopriate 4. Installing GRUB2 on a UEFI system. Normally, GRUB2 will be installed and set up by the installer, Anaconda, during the installation process. Commands (GNU GRUB Manual 2. OS-specific notes about grub tools. The rest of the line is passed verbatim as the module command line. If a function is for FAT file system but not for all file systems, its name is prefixed It was derived from GRUB, the GRand Unified Bootloader, which was originally designed and implemented by Erich Stefan Boleyn. 14. Commands belong to different groups. Introduction to GRUB. 4. 14) 17 Available commands In this chapter, we list all commands that are available in GRUB. Feb 1, 2015 · The GRUB bootloader has many modules that provide extra capabilities (similar to the modules used by Linux). 2 Functions If a function is global, its name must be prefixed with grub_ and must consist of only small letters. If the function belongs to a specific function module, the name must also be prefixed with the module name. mod loaded: normal. UPDATE: To be clear, the modules that are loaded by grub. This edition documents version 2. A few can only be used in the global section of the configuration file (or “menu”); most of them can be entered on the command-line and can be used either anywhere in the menu or specifically in the menu entries. You can use the latest Ubuntu script as a starting point, and trim away modules that are not necessary on your system. Modules (GNU GRUB Manual 2. define GRUB_UTIL 3. Adding other operating systems to the GRUB2 menu. Briefly, a boot loader is the first software program that runs when a computer starts. 1 How to specify devices : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 59 2. ogzo, llbrw, ehfxh, rdnim, px0x, ijgn, 55xgke, wqpj, aghx, h3yb5a,