[Ale-study] HELP: Linux(Centos) Boot Process

[DJ-Pfulio]

On 08/12/2015 11:58 AM, Chris Wreh wrote:
> Hi Everyone,
> 
> I am in the kindergarten stage of Linux(Centos) and I am trying to
> understand GRUB at the boot process. After I select my kernel and press 'a'
> to edit the kernel parameter nothing happen. There's no default parameter
> (e.g. *grub append > ro root=LABEL=/ rhgb quiet*) that appear as
> illustrated in the book I am using. However, when I press 'c', it then take
> me to GRUB commands prompt as seen below and I don'tknow what to do from
> there:
> *grub>*
> Based on the above, I will appreciate your respond to the below questions:
> 1. Is there a reason why I do not see anything when I press 'a' to edit the
> kernel parameter? *NB: I actually do not want to edit but rather want to
> see what happen when 'a' is pressed*.
> 2. What specific command will I need to type at GRUB command prompt?
> 3. How do I set dual boot if I decide not to use Oracle VM. 

I don't know the answer, but grub has changed drastically so depending
on the book you are reading and the OS you are working from, those could
be completely different versions of grub.  Plus the genius people at
grub decided to call grub2 before the grub version numbers were at 2.0.
 Some of the late v1.9x versions are grub2.  Genius, right?

So - Redhat 6.x books are based on the 2.6 kernels and old versions of
grub.  Redhat v7 books are based on grub2.

Debian and Ubuntu grub versions - I don't remember when grub2 started.
None of my 12.04 and newer systems use grub1, I can say that.

This group has a very limited readership. Might be better to ask on the
larger, general list.  In fact, yours is the first message on this group
in over a year.