Suppose you have multiple kernels installed on your Linux system and your GRUB menu looks something like this: Debian GNU/Linux, kernel 2.6.26-deb-ws – Kernel 0 Debian GNU/Linux, kernel 2.6.26-deb-ws (single-user mode) – Kernel 1 Debian GNU/Linux, kernel 2.6.26-1-amd64 – Kernel 2 Debian GNU/Linux, kernel 2.6.26-1-amd64 (single-user mode) – Kernel 3 Debian GNU/Linux, kernel 2.6.24-etchnhalf.1-686 – […]