help in init 6.....

[East]

hi all
When i type init 6 in the terminal, it reboots the system by unloading modules,filesystem....etc. all things are in /etc/rc... folders or anything present in kernel code...Can anyone explain the reboot process.
Thanks in advance.

[i92guboj]

hi all
When i type init 6 in the terminal, it reboots the system by unloading modules,filesystem....etc. all things are in /etc/rc... folders or anything present in kernel code...Can anyone explain the reboot process.
Thanks in advance.

I am not sure if I understand the question.

The 6th runlevel usually means "reboot". 0 is halt. 1 is single user. Usually, 3 is used for normal operation and 5 for X.

Anyway, this is arbitrary. The runlevels are defined usually in /etc/inittab, and what is done on each runlevel, usually depends on that file, and the stuff in /etc/rc.d or /etc/runlevels, it depends on the init system of each distro really.

Besides that, all what happens before init, it's kernel stuff and doesn't have anything to do with init.

[East]

Currently i am using RedHat. my doubt is once user types init 6 in the terminal, /etc/init.d/halt is called and in that all the modules and filesystem are unmounted ( is it correct?) and finally /sbin/reboot is called to reboot the system. So at this time whether the system switches to real mode or not ? I want some doc which deals about after system restart and before system boots up and things happen in BIOS like....Can anyone help me

[jayd512]

Is this of any use? I found it by putting init into <Linux> - Google Search.

[East]

I found /usr/src/linux2.6.23.12/arch/i386/kernel/reboot.c. In this file, when system reboots the OS switches from protected mode to real mode. when this corresponding object file will be used? is any differnce b/w /sbin/reboot and the above specified reboot.o. Can anyone explain me.