[gentoo-user] Re: Is grub2 stable and who uses it?

[Grant Edwards <grant.b.edwards@gmail.com>]

On 2011-10-04, Canek Pel??ez Vald??s <caneko@gmail.com> wrote:
> On Tue, Oct 4, 2011 at 2:24 PM, Grant Edwards <grant.b.edwards@gmail.com> wrote:
>> On 2011-10-04, Canek Pel??ez Vald??s <caneko@gmail.com> wrote:
>>
>>> Then any boot loader will need to call something to start it.
>>> Understand this: any Linux/Unix init system (systemd, SysV, Upstart,
>>> OpenRC) is simply a program... that the Linux kernel itself executes.
>>
>> I know. ??What I don't understand is the statement that grub2 calls (or
>> connects to) the init system.
>>
>>> That's the init= command line in the kernel.
>>>
>>> The bootloader calls an operating system. The init system (if at all)
>>> that the OS uses doesn't matter: so if you have an operating system,
>>> any bootloader should be able to boot it (bearing things like being
>>> able to understand the filesystem etc.)
>>
>> I know how bootloaders like LILO and grub-legacy work. ??What I don't
>> understand is the statement that grub2 is somehow aware of the booted
>> OS's init system.
>
> Oh. The configuration file of GRUB2 is autogenerated, and this means
> that the init=systemd has to be passed to the kernel line.
>
> In that sense, GRUB2 is "aware" of it.

So to use grub2 you have to replace the normal "init" program that's
started by the kernle as PID#1 with something else?

-- 
Grant Edwards               grant.b.edwards        Yow! Where does it go when
                                  at               you flush?
                              gmail.com