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GNU GRUB (short for GNU GRand Unified Bootloader, commonly referred to as GRUB) is a boot loader package from the GNU Project.GRUB is the reference implementation of the Free Software Foundation's Multiboot Specification, which provides a user the choice to boot one of multiple operating systems installed on a computer or select a specific kernel configuration available on a particular ...
It also contains a command-line interface, which makes it easier to fix or modify GRUB if it is misconfigured or corrupt. [16] Loadlin is a bootloader that can replace a running DOS or Windows 9x kernel with the Linux kernel at run time. This can be useful in the case of hardware that needs to be switched on via software and for which such ...
Supersedes other *sum utilities with -a option from version 9.0. comm: Compares two sorted files line by line csplit: Splits a file into sections determined by context lines cut: Removes sections from each line of files expand: Converts tabs to spaces fmt: Simple optimal text formatter fold: Wraps each input line to fit in specified width head
LILO (Linux Loader) is a boot loader for Linux and was the default boot loader for most Linux distributions. Unlike loadlin , it allowed booting Linux without having DOS on the computer. [ 3 ] As of 2009, most distributions had switched to GRUB as the default boot loader. [ 4 ]
Linux bzImage, Multiboot, other ELF image Depending on configuration and user space The kexec system call can start another kernel, replacing the current running Linux, thus turning a Linux-based operating system into a fancy bootloader.
In an OS/2 dual-boot configuration, the C drive can contain both DOS and OS/2. The user issues the BOOT command [1] from the DOS or OS/2 command line to do the necessary copy, move and rename operations and then reboot to the specified system on C:. Other systems provide similar mechanisms for alternate systems on the same logical drive.
The lsmod command lists the loaded kernel modules. In emergency cases, when the system fails to boot due to e.g. broken modules, specific modules can be enabled or disabled by modifying the kernel boot parameters list (for example, if using GRUB, by pressing 'e' in the GRUB start menu, then editing the kernel parameter line).
UEFI binaries like GRUB or the Linux kernel can be booted via the boot manager or from the command-line interface. U-Boot runs a command-line interface on a console or a serial port. Using the CLI, users can load and boot a kernel, possibly changing parameters from the default.