Start (boot) your computer’s operating system to run when the computer is turned on. Boot Sequence is the first set of operations which is performed when the computer is turned on. Some managers are typically used GRUB, bootmgr, SYSLINUX, LILO, NTLDR. Linux implementation is much easier to understand and learn about them.
For Linux loaders are usually run LILO (Linux Loader), loadlin (Load Linux) and GRUB (Grand Unified Bootloader). LILO boot loader is the most popular for those who use Linux as the main or only operating system.LILO is very fast loading. Loadlin used by those who have multiple operating systems. Loadlin is sometimes used as a boot loader for Linux backup in case of LILO. GRUB is preferred by many users of Red Hat Linux.
Loader consists of three programs:
Program boot sector (512 bytes) is loaded directly from the BIOS at startup.
The program for the second phase of the boot sector is loaded and make the program.
Start the installation is used to install the bootloader and program the second step on the boot disk. They must be stored in special locations on the first sector of boot device. It may not be copied with a simple click Copy.
Now let’s compare the features of GRUB and LILO bootloaders.GRUB most commonly used is able to accommodate the amount of free operating systems and custom. GRUB works well with Linux, DOS, Windows and BSD. GRUB is dynamically configurable means that you can make changes at the start, including changes to existing entries beginning with, add your own entries, selection of different colors, or modifying the initrd. GRUB supports Logical Block Address mode, which means that if your computer has a modern BIOS access to more than 8 GB (1024 cylinders) free disk space on your hard disk, GRUB will automatically access it. In addition to these GRUB can be run from, or can be installed on any device, such as floppy disks, hard disk, CD-ROMs, USB, network operating systems, and can carry as many places, including network drives. You can also expand the operating system files before starting.
LILO is a reasonable choice for many users of Linux and boot faster. LILO is not dependent on a particular file system.One up to sixteen different images can be selected at startup. Parameters can be set independently for each core. LILO can be installed either on the Master Boot Record (MBR) and partition boot sector. At system startup, only the BIOS drivers are available for LILO to access hard disks. Thus, a very old BIOS, the area is limited access to war 0-1023 of the first two blocks. For further BIOS, LILO can use 32-bit Logical Block Addressing (LBA) access to all the hard disk that the BIOS supports. LILO has several disadvantages compared to the GNU GRUB.
LILO only supports up to 16 different selections to boot, GRUB supports an unlimited number of entries in the luggage compartment.
LILO can not boot from the network.
LILO must be rewritten every change GRUB configuration file, no.
LILO has no interactive command interface.
Finally, there are several options bootloader that works with Linux user can choose what’s best needs.