Thursday, July 23, 2009

Booting another bootloader(grub,lilo,ntldr....) from grub

Chainloading an operating system allows grub to boot an opearating system's boot loader. This is commonly used to boot Windows for instance.

Suppose main grub installed on /dev/sda1 and the second os is installed on /dev/sda2
in /boot/grub/grub.conf or /boot/grub/menu.lst (which is grub configuration file)

add as following

title Linux 2 on /dev/sda2
root (hd0,1)
# or use rootnoverify (hd0,1)
#rootnoverify is same as root but don't attempt to mount the partition.
chainloader +1


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